A power conversion circuit and related methods

Abstract

The application discloses a power conversion circuit, which comprises a source adjusting circuit, a load adjusting circuit, a first controller, a second controller and a pulse transmission unit. The second controller is used for acquiring output information of the load adjusting circuit and generating a first pulse signal. The first controller is used for receiving the first pulse signal through the pulse transmission unit and controlling the source adjusting circuit according to the first pulse signal, so that the source adjusting circuit is adjusted. In this way, the high-speed transmission of the first pulse signal between the second controller and the first controller can be realized through the pulse transmission unit, the first controller can control the source adjusting circuit according to the first pulse signal, the rapid response of the source adjusting circuit to the change of the output end can be realized, the ripple change in the power conversion circuit caused by the disturbance of the load and the like of the output end can be timely inhibited, the demand for the output capacitor and other devices can be reduced, and the occupied volume of the device can be reduced.

Description

Technical Field

[0001] This application relates to the field of power conversion technology, specifically to a power conversion circuit and related methods. Background Technology

[0002] In practical applications, various electronic devices such as servers, user terminals, storage devices, and network devices may have different power requirements. Therefore, power conversion circuits exist in the corresponding power systems to convert power sources. These circuits typically include power factor correction (PFC) circuits and direct current to direct current (DCDC) circuits. In these power conversion circuits, the PFC circuit is usually controlled by a PFC controller, and the DCDC circuit is controlled by a DCDC circuit controller.

[0003] The outputs of both the PFC and DC-DC circuits typically require large capacitors as energy storage devices. The overall circuit response to disturbances is slow; for example, the PFC circuit cannot efficiently adjust based on changes in the output of the DC-DC circuit.

[0004] At this point, in order to reduce voltage fluctuations and ripple at the output end during the adjustment process, the output capacitors of the PFC circuit and the DC-DC circuit are usually large, resulting in a large device size and making it difficult to miniaturize. Summary of the Invention

[0005] This application provides a power conversion circuit to address the problem that current power conversion circuits require large output capacitors to minimize ripple, resulting in large device size and hindering miniaturization. This application also provides corresponding methods, apparatus, devices, computer-readable storage media, and computer program products.

[0006] The first aspect of this application provides a power conversion circuit, which includes a source adjustment circuit, a load adjustment circuit, a first controller for controlling the operation of the source adjustment circuit, a second controller for controlling the operation of the load adjustment circuit, and a pulse transmission unit. The input terminal of the source adjustment circuit is coupled to a power supply, and the output terminal of the source adjustment circuit is coupled to the input terminal of the load adjustment circuit. The output terminal of the load adjustment circuit is coupled to the output terminal of the power conversion circuit. The first controller is coupled to the second controller through the pulse transmission unit. The second controller is used to acquire the output information of the load adjustment circuit and generate a first pulse signal. The first controller is used to receive the first pulse signal through the pulse transmission unit and control the source adjustment circuit according to the first pulse signal, so that the source adjustment circuit performs adjustment.

[0007] In the first aspect, a pulse transmission unit can be used to transmit information from the second controller to the first controller in the form of a first pulse signal. This allows for high-speed transmission of the first pulse signal between the second and first controllers, enabling the first controller to control the source adjustment circuit based on the first pulse signal. This allows the source adjustment circuit to respond quickly to changes in the output, thereby promptly suppressing ripple variations in the power conversion circuit caused by disturbances such as load at the output, reducing the demand for components such as output capacitors, and ultimately reducing the size of the components.

[0008] In one possible implementation of the first aspect, the first pulse parameter of the first pulse signal is used to describe the expected value of the target parameter in the source adjustment circuit; the first controller is used to control the source adjustment circuit according to the first pulse parameter of the first pulse signal, so that the source adjustment circuit adjusts based on the expected value.

[0009] In this possible implementation, after obtaining the output information of the load adjustment circuit, the second controller can generate a first pulse signal to describe the expected value of the target parameter in the source adjustment circuit. Then, the first pulse signal can be conveniently and quickly transmitted to the first controller via a pulse transmission unit. This allows the first controller to determine the expected value of the target parameter based on the first pulse parameter of the first pulse signal, and thus promptly control the source adjustment circuit according to the expected value fed back by the second controller. This ensures that the target parameter of the source adjustment circuit can be adjusted in a timely manner based on the output conditions, thereby suppressing ripple changes in the power conversion circuit caused by disturbances such as load at the output, reducing the demand for components such as output capacitors, and consequently reducing the component footprint.

[0010] In one possible implementation of the first aspect, the source adjustment circuit includes a PFC circuit; the input terminal of the PFC circuit is coupled to a power supply, and the output terminal of the PFC circuit is coupled to the input terminal of the load adjustment circuit; the first pulse parameter corresponding to the first pulse signal is used to describe the desired voltage at the output terminal of the PFC circuit; the first controller is used to control the PFC circuit according to the first pulse parameter of the first pulse signal to indicate that the output voltage of the PFC circuit is adjusted to the desired voltage.

[0011] In this possible implementation, considering the impact of output information such as load information on the power conversion circuit, the output voltage of the PFC circuit can be adaptively adjusted according to different output conditions. This optimizes the control loop of the source adjustment circuit for different output conditions, thereby improving voltage fluctuations and other issues in the power conversion circuit.

[0012] In one possible implementation of the first aspect, the source adjustment circuit further includes a PFC drive circuit for driving a PFC circuit; the PFC drive circuit is coupled to a first controller for controlling the PFC drive circuit according to a first pulse parameter of a first pulse signal to instruct the output voltage of the PFC circuit to be adjusted to a desired voltage.

[0013] In one possible implementation of the first aspect, the load regulation circuit includes a secondary circuit in the DC-DC circuit, and the source regulation circuit includes a PFC circuit and a primary circuit in the DC-DC circuit; the input terminal of the PFC circuit is coupled to the power supply, the output terminal of the PFC circuit is coupled to the input terminal of the primary circuit, and the output terminal of the primary circuit is coupled to the input terminal of the secondary circuit; the first pulse parameter corresponding to the first pulse signal is used to describe the expected value of the control parameter of the primary circuit; the first controller is used to: control the primary circuit according to the first pulse parameter of the first pulse signal to instruct the control parameter of the primary circuit to be adjusted based on the expected value.

[0014] In current conventional technologies, the second controller typically requires an isolated drive circuit to control the primary-side circuit. This drive circuit is usually complex and occupies a significant area. Furthermore, in current conventional technologies, the communication between the first and second controllers has a considerable delay. Therefore, the response speed of the primary-side circuit in the DC-DC converter to load changes is not synchronized with the response of the PFC circuit, and the time difference is large. This results in a mismatch between the control methods of the primary-side circuit and other components such as the PFC circuit, leading to large fluctuations in the output voltage of the power conversion circuit. In this possible implementation, the second controller can transmit a first pulse signal to the first controller via a pulse transmission unit. This allows the first controller to control the primary-side circuit in the DC-DC converter based on the first pulse parameters of the first pulse signal. This ensures that the output of the primary-side circuit changes promptly based on circuit changes, thus better meeting practical requirements.

[0015] In one possible implementation of the first aspect, the power conversion circuit further includes a primary-side driving circuit for driving the primary-side circuit; the primary-side driving circuit is coupled to a first controller, and the power supply of the primary-side driving circuit and the power supply of the first controller share a common ground; the first controller is used to control the primary-side driving circuit according to a first pulse parameter of a first pulse signal to instruct the control parameters of the primary-side circuit to be adjusted based on a desired value.

[0016] In this possible implementation, the first controller controls the primary circuit in the transformer of the DC-DC circuit through the primary-side drive circuit based on the first pulse parameters of the first pulse signal. In this case, the power supplies of the first controller and the primary-side drive circuit share a common ground. Therefore, there is no need for a complex, bulky isolated drive circuit between the first controller and the primary-side circuit, thus reducing the size of the components in the circuit. Furthermore, this possible implementation allows the output of the primary-side circuit to change promptly based on changes in the circuit conditions, thus better meeting practical needs.

[0017] In one possible implementation of the first aspect, the first pulse parameter includes the frequency of the first pulse signal and / or the operating time of the first pulse signal in each cycle.

[0018] In one possible implementation of the first aspect, the load regulation circuit includes the secondary circuit of the DC-DC circuit, and the source regulation circuit includes the PFC circuit and the primary circuit of the DC-DC circuit; the input terminal of the PFC circuit is coupled to the power supply, the output terminal of the PFC circuit is coupled to the input terminal of the primary circuit, and the output terminal of the primary circuit is coupled to the input terminal of the secondary circuit; the source regulation circuit includes multiple target parameters, and the frequency band of the first pulse signal corresponding to different target parameters is different, wherein the multiple target parameters include the desired voltage of the output terminal of the PFC circuit and the desired value of the control parameters of the primary circuit.

[0019] In this possible implementation, the second controller can transmit different first pulse signals to the first controller based on different control scenarios. At this time, the frequency band and other parameters of the first pulse signal in different control scenarios can be different, so that the first controller can determine whether the first pulse parameter in the first pulse signal describes the expected voltage at the output terminal of the PFC circuit or the expected value of the control parameter of the primary side circuit of the DC-DC circuit based on the frequency band and other parameters, and thus perform control accordingly.

[0020] In one possible implementation of the first aspect, the load adjustment circuit is an isolated circuit, and the pulse transmission unit transmits the first pulse signal through an electrically isolated device.

[0021] In this possible implementation, the isolated load regulation circuit can effectively isolate the input and load terminals of the power conversion circuit, thereby better ensuring the safety of the power conversion circuit. In this case, the power supplies of the first controller and the second controller are typically not grounded. Therefore, to achieve pulse signal transmission between the first and second controllers, the pulse transmission unit transmits the pulse signal through an electrically isolated device. For example, the electrically isolated device may include one or more of the following: a transformer, an optocoupler, a capacitive coupler, and a magnetic coupler.

[0022] A second aspect of this application provides a control method applied to a second controller in a power conversion circuit. The power conversion circuit further includes a source adjustment circuit, a load adjustment circuit, a first controller for controlling the operation of the source adjustment circuit, and a second controller for controlling the operation of the load adjustment circuit. The input terminal of the source adjustment circuit is coupled to a power source, and the output terminal of the source adjustment circuit is coupled to the input terminal of the load adjustment circuit. The output terminal of the load adjustment circuit is coupled to the output terminal of the power conversion circuit. The control method includes: acquiring output information of the load adjustment circuit; generating a first pulse signal; a first pulse parameter of the first pulse signal being used to describe the expected value of a target parameter in the source adjustment circuit; and sending the first pulse signal to the first controller, so that the first controller controls the source adjustment circuit according to the first pulse parameter of the first pulse signal, wherein the source adjustment circuit adjusts based on the expected value.

[0023] In one possible implementation of the second aspect, the source adjustment circuit includes a PFC circuit, and the first pulse parameter corresponding to the first pulse signal is used to describe the desired voltage at the output of the PFC circuit.

[0024] In one possible implementation of the second aspect, the output information includes the load amount of the load adjustment circuit; obtaining the output information of the load adjustment circuit and generating a first pulse signal includes: determining the value of a first pulse parameter of the first pulse signal based on the load amount; and generating the first pulse signal based on the value of the first pulse parameter.

[0025] In one possible implementation of the second aspect, determining the value of the first pulse parameter of the first pulse signal based on the load includes: determining a target preset interval corresponding to the load in a plurality of preset intervals; determining the value of the first pulse parameter of the first pulse signal based on the target preset interval and a preset correspondence, wherein the preset correspondence includes the correspondence between each preset interval and the first pulse parameter.

[0026] In one possible implementation of the second aspect, the preset correspondence includes a first correspondence between each preset interval and the output voltage of the PFC circuit, and a second correspondence between the output voltage of the PFC circuit and the first pulse parameter; determining the value of the first pulse parameter of the first pulse signal according to the target preset interval and the preset correspondence includes: determining the desired voltage at the output terminal of the PFC circuit according to the target preset interval and the first correspondence; and determining the value of the first pulse parameter of the first pulse signal according to the desired voltage and the second correspondence.

[0027] In one possible implementation of the second aspect, the load adjustment circuit includes the secondary circuit of the DC-DC circuit, and the source adjustment circuit includes the PFC circuit and the primary circuit of the DC-DC circuit; the first pulse parameter corresponding to the first pulse signal is used to describe the expected value of the control parameter of the primary circuit.

[0028] In one possible implementation of the second aspect, the method further includes: receiving a second pulse signal transmitted by a first controller via a pulse transmission unit, wherein the second pulse parameter of the second pulse signal is used to describe the first output voltage of the PFC circuit; obtaining output information of the load adjustment circuit and generating a first pulse signal, including: generating the first pulse signal based on the output information and the second pulse parameter of the second pulse signal.

[0029] A third aspect of this application provides a control method applied to a first controller in a power conversion circuit. The power conversion circuit further includes a source adjustment circuit, a load adjustment circuit, and a second controller for controlling the operation of the load adjustment circuit. The first controller controls the operation of the source adjustment circuit. The input terminal of the source adjustment circuit is coupled to a power supply, and the output terminal of the source adjustment circuit is coupled to the input terminal of the load adjustment circuit. The output terminal of the load adjustment circuit is coupled to the output terminal of the power conversion circuit. The control method includes: receiving a first pulse signal transmitted by the second controller, the first pulse signal being generated based on the output information of the load adjustment circuit, and a first pulse parameter of the first pulse signal being used to describe the desired value of a target parameter in the source adjustment circuit; and controlling the source adjustment circuit according to the first pulse parameter of the first pulse signal so that the source adjustment circuit adjusts based on the desired value.

[0030] In one possible implementation of the third aspect, the source adjustment circuit is controlled according to the first pulse parameter of the first pulse signal, including: calculating the expected value corresponding to the value of the first pulse parameter of the first pulse signal according to the target correspondence, wherein the target correspondence includes the correspondence between the first pulse parameter and the target parameter; and controlling the source adjustment circuit according to the expected value.

[0031] In one possible implementation of the third aspect, the source adjustment circuit includes a power factor correction (PFC) circuit, wherein a first pulse parameter corresponding to the first pulse signal is used to describe the desired voltage at the output of the PFC circuit; the source adjustment circuit is controlled according to the first pulse parameter of the first pulse signal so that the source adjustment circuit is adjusted based on the desired value, including: controlling the PFC circuit according to the first pulse parameter of the first pulse signal to instruct the output voltage of the PFC circuit to be adjusted to the desired voltage.

[0032] In one possible implementation of the third aspect, the load adjustment circuit includes a secondary circuit in the DC-DC circuit, and the source adjustment circuit includes a PFC circuit and a primary circuit in the DC-DC circuit; controlling the source adjustment circuit according to the first pulse parameter of the first pulse signal to make the source adjustment circuit adjust based on the desired value includes: controlling the primary circuit according to the first pulse parameter of the first pulse signal to instruct the control parameters of the primary circuit to be adjusted based on the desired value.

[0033] In one possible implementation of the third aspect, a first output voltage of the PFC circuit is obtained; a second pulse signal is transmitted to a second controller, the second pulse parameter of the second pulse signal being used to describe the first output voltage, so that the second controller generates the first pulse signal based on the output information and the second pulse parameter of the second pulse signal.

[0034] In one possible implementation of the third aspect, controlling the primary-side circuit according to the first pulse parameter of the first pulse signal includes: after receiving the first pulse signal, acquiring the second output voltage of the PFC circuit; obtaining a target coefficient based on the difference between the second output voltage and the first output voltage; correcting the expected value indicated by the first pulse signal based on the target coefficient to obtain a target value of the control parameter; and controlling the primary-side circuit according to the target value.

[0035] A fourth aspect of this application provides a control device applied to a second controller, the device having the function of implementing the method of the second aspect or any possible implementation of the second aspect. This function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above function, such as a receiving module, a generating module, and a transmitting module.

[0036] The fifth aspect of this application provides a controller including at least one processor, a memory, and computer-executable instructions stored in the memory and executable on the processor. When the computer-executable instructions are executed by the processor, the processor executes a method as described in the second aspect or any possible implementation thereof.

[0037] The sixth aspect of this application provides a computer-readable storage medium storing one or more computer-executable instructions, wherein when the computer-executable instructions are executed by a processor, the processor performs a method as described in the second aspect above or any possible implementation thereof.

[0038] The seventh aspect of this application provides a computer program product that stores one or more computer-executable instructions, wherein when the computer-executable instructions are executed by a processor, the processor executes a method as described in the second aspect above or any possible implementation thereof.

[0039] An eighth aspect of this application provides a chip system including a processor for supporting a terminal in implementing the functions described in the second aspect or any possible implementation thereof. In one possible design, the chip system may further include a memory for storing necessary program instructions and data for a computer device. This chip system may be composed of chips or may include chips and other discrete devices.

[0040] A ninth aspect of this application provides a control device applied to a first controller, the device having the function of implementing the method of the third aspect or any possible implementation of the third aspect. This function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described function, such as a receiving module, a control module, an acquisition module, and a transmission module.

[0041] The tenth aspect of this application provides a controller, which includes at least one processor, a memory, and computer-executable instructions stored in the memory and executable on the processor. When the computer-executable instructions are executed by the processor, the processor executes a method as described in the third aspect above or any possible implementation of the third aspect.

[0042] The eleventh aspect of this application provides a computer-readable storage medium for storing one or more computer-executable instructions, wherein when the computer-executable instructions are executed by a processor, the processor performs a method as described in the third aspect above or any possible implementation thereof.

[0043] The twelfth aspect of this application provides a computer program product storing one or more computer-executable instructions, wherein when the computer-executable instructions are executed by a processor, the processor executes a method as described in the third aspect above or any possible implementation thereof.

[0044] The thirteenth aspect of this application provides a chip system including a processor for supporting a terminal in implementing the functions involved in the third aspect or any possible implementation thereof. In one possible design, the chip system may further include a memory for storing program instructions and data necessary for the computer device. This chip system may be composed of chips or may include chips and other discrete devices.

[0045] The fourteenth aspect of this application provides an electronic device that includes a power conversion circuit as described in the first aspect or any possible implementation thereof.

[0046] The technical effects of the second to fourteenth aspects or any of their possible implementations can be found in the first aspect or the technical effects of its related possible implementations, and will not be repeated here. Attached Figure Description

[0047] Figure 1 This is an exemplary schematic diagram of a power conversion circuit provided in an embodiment of this application;

[0048] Figure 2 This is an exemplary schematic diagram of the control method provided in an embodiment of this application;

[0049] Figure 3 This is an exemplary schematic diagram of the first controller, the second controller, and the pulse transmission unit provided in an embodiment of this application;

[0050] Figure 4 This is another exemplary schematic diagram of the control method provided in the embodiments of this application;

[0051] Figure 5 This is another exemplary schematic diagram of the power conversion circuit provided in the embodiments of this application;

[0052] Figure 6 This is an exemplary flowchart illustrating the determination of the desired values ​​of control parameters for the primary circuit of a DC-DC circuit, as provided in an embodiment of this application.

[0053] Figure 7 This is an exemplary schematic diagram related to the first controller and source adjustment circuit provided in the embodiments of this application;

[0054] Figure 8 This is a schematic diagram of an embodiment of the control device provided in this application;

[0055] Figure 9 This is a schematic diagram of another embodiment of the control device provided in this application;

[0056] Figure 10 This is a schematic diagram of the controller provided in an embodiment of this application;

[0057] Figure 11 This is another schematic diagram of the controller provided in the embodiments of this application;

[0058] Figure 12 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0059] The embodiments of this application are described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. As those skilled in the art will understand, with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0060] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. In this application, "at least one" means one or more, and "more than one" means two or more. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0061] As described in the background section, in the power systems of various electronic devices such as servers, user terminals, storage devices, and network devices, there are power conversion circuits that convert power sources, such as power conversion circuits that include PFC circuits and DC-DC circuits.

[0062] With the development of information technology, higher requirements have been placed on the performance of power conversion circuits in various application fields.

[0063] Take a data center as an example. The power supply system of a data center can supply power to one or more electronic devices such as servers, storage devices, and various network devices (e.g., switches, routers, firewalls, bridges, hubs, gateways, network interface controllers (NICs)).

[0064] Each electronic device may include one or more electrical components such as a central processing unit (CPU), memory, and hard disk. To meet the power requirements of these components, the electronic device may include a power conversion circuit to convert the electricity output from the mains or power source into the direct current (DC) form required by the components. These electrical components in the electronic device can be considered the load of this power conversion circuit.

[0065] Currently, data centers are expanding in scale, and the power density of their power supply systems is increasing. The size of passive components such as capacitors in power modules directly affects the power density. One major approach to reducing the size of passive components is to reduce their capacitance within the circuit.

[0066] However, current PFC controllers and DC-DC circuit controllers are slow to respond to disturbances. For example, PFC circuits cannot efficiently adjust based on changes in the output. In the context of gradually upgrading server computing power, it is difficult to meet the power supply stability requirements of internal server components such as processors and memory when the workload fluctuates.

[0067] In order to reduce voltage fluctuations at the output terminal during the adjustment process and thus reduce ripple, the output terminals of PFC circuits and DC-DC circuits are usually large, resulting in a large device size and making it difficult to miniaturize.

[0068] To address the aforementioned issues, this application provides a circuit converter that can suppress ripple changes caused by disturbances such as load variations. This reduces the capacity requirements of passive components such as output capacitors in the power conversion circuit, thereby reducing the size of the corresponding components. Consequently, the size of components such as output capacitors configured in the power conversion circuit can be reduced, which is beneficial for miniaturizing the power conversion circuit.

[0069] The power conversion circuit is described below.

[0070] In this embodiment, the power conversion circuit includes a source adjustment circuit, a load adjustment circuit, a first controller for controlling the operation of the source adjustment circuit, a second controller for controlling the operation of the load adjustment circuit, and a pulse transmission unit.

[0071] The connection relationships between the various modules in the power conversion circuit are as follows: Figure 1 As shown.

[0072] exist Figure 1 In this circuit, the input terminal of the source adjustment circuit is coupled to the power supply, the output terminal of the source adjustment circuit is coupled to the input terminal of the load adjustment circuit, the output terminal of the load adjustment circuit is coupled to the output terminal of the power conversion circuit, and the output terminal of the power conversion circuit is coupled to the load.

[0073] The first controller is coupled to the second controller through a pulse transmission unit.

[0074] The following section introduces each module in the circuit converter.

[0075] In this embodiment, the output of the power supply coupled to the power conversion circuit can be determined based on the actual application scenario. Generally, the output of this power supply is alternating current (AC), and the power conversion circuit can convert this AC power to DC power that meets the load requirements and supply power to the load.

[0076] In this power conversion circuit, the source adjustment circuit is used to adjust the output of the power supply. The source adjustment circuit is coupled to the power supply. The load adjustment circuit adjusts the output of the source adjustment circuit to obtain an output that meets the load requirements.

[0077] It is understood that the power conversion circuit may include a two-stage system, where the source regulation circuit is the front-end circuit and the first controller can act as a first-level controller, while the load regulation circuit is the back-end circuit and the second controller can act as a second-level controller. The input terminal of the source regulation circuit can receive AC power, and the output terminal of the source regulation circuit can be coupled to the input terminal of the load regulation circuit. The output terminal of the load regulation circuit can be coupled to the load to provide DC power to the load. The type of load can be various, and this application embodiment does not limit this. Taking a data center as an example, a data center may include electronic devices such as servers, storage devices, and various network devices. One or more of the electrical components such as central processing units (CPUs), memory, and hard drives contained in these electronic devices can be the load of the power conversion circuit.

[0078] The specific structure of the source adjustment circuit and the load adjustment circuit is not limited here.

[0079] In one example, the source regulation circuit may include a PFC circuit. The load regulation circuit may include part or all of the circuitry in the DC-DC converter circuit. When the load regulation circuit includes a portion of the DC-DC converter circuitry, the portion of the DC-DC converter circuitry not included in the load regulation circuitry may be controlled by the source regulation circuitry; that is, this portion may be included in the source regulation circuitry. For example, in some examples, the primary winding of the transformer in the DC-DC converter circuitry may be included in the source regulation circuitry for control by a first controller.

[0080] The PFC circuit is used to convert the received AC power into DC power. There are various possible structures for the PFC circuit, which are not limited here.

[0081] For example, the PFC circuit can be a passive PFC circuit or an active PFC circuit. For example, in the PFC circuit, the input AC power can be converted into a ripple by a bridge rectifier, and then the voltage ripple can be improved by inductors, capacitors and / or other electronic devices to output DC power to subsequent circuits (such as DC-DC circuits).

[0082] In one example, the PFC circuit may include a bridge rectifier and a chopper circuit. For example, the chopper circuit may be a Buck circuit as a buck chopper, a Boost circuit as a boost chopper, or a Buck-Boost circuit as a buck-boost chopper, etc.

[0083] A DC-DC circuit is used to convert the DC output from a PFC circuit into DC of a target voltage, so that the output voltage of the DC-DC circuit is the target voltage. The DC output from the DC-DC circuit can then be used to power a load.

[0084] PFC and DC-DC circuits can be included in the power conversion circuit, so that the power conversion circuit can convert AC power into DC power required by the load.

[0085] The specific types of the first and second controllers are not limited here. Exemplarily, both the first and second controllers may include one or more of the following data processing modules: microcontroller unit (MCU), central processing unit (CPU), microprocessor, application-specific integrated circuit (ASIC), graphics processing unit (GPU), digital signal processor (DSP), field-programmable gate array (FPGA), or other programmable logic devices, to implement corresponding data processing operations. The type of the first controller may be the same as or different from the type of the second controller. These controllers may not be separately configured but can be replaced by existing controllers in the computing device, thereby reducing costs and not increasing circuit size.

[0086] Of course, in the embodiments of this application, it is not limited to the source adjustment circuit being controlled only by the first controller, nor is it limited to the load adjustment circuit being controlled only by the second controller.

[0087] The first controller is coupled to the source adjustment circuit for controlling the source adjustment circuit. The coupling between the first controller and the source adjustment circuit can be a direct or indirect connection between the first controller and at least one device (such as a corresponding switching device) in the source adjustment circuit to control the source adjustment circuit. This indirect connection can also include other devices between the first controller and the corresponding device in the source adjustment circuit, such as a corresponding drive circuit.

[0088] For example, in some examples, the power conversion circuit may include a PFC circuit and a primary-side circuit of a DC-DC converter. Additionally, it may include a PFC driver circuit for driving the PFC circuit, and a primary-side driver circuit for driving the primary-side circuit. A first controller may be coupled to the PFC driver circuit, and the PFC driver circuit may be coupled to the PFC circuit. The first controller may also be coupled to the primary-side driver circuit, and the primary-side driver circuit may be coupled to the primary-side circuit.

[0089] In this way, the first controller can adjust the PFC circuit by controlling the PFC drive circuit, and can adjust the primary-side circuit by controlling the primary-side drive circuit.

[0090] Furthermore, the source regulation circuit may also include an input detection circuit and a PFC output voltage detection circuit. The input detection circuit is coupled to both the input terminal of the PFC circuit and the first controller, allowing the first controller to detect the input voltage of the PFC circuit. Similarly, the PFC output voltage detection circuit is coupled to both the output terminal of the PFC circuit and the first controller, allowing the first controller to detect the output voltage of the PFC circuit.

[0091] The second controller is used to couple with the load adjustment circuit for controlling the load adjustment circuit. The coupling of the second controller with the load adjustment circuit can mean that the second controller is directly or indirectly connected to at least one device (such as a corresponding switching device) in the load adjustment circuit to control the load adjustment circuit. This indirect connection can also include other devices between the second controller and the corresponding device in the load adjustment circuit, such as a corresponding drive circuit.

[0092] For example, the power conversion circuit may also include a secondary-side drive circuit for driving the secondary-side circuit of the DC-DC converter. This secondary-side drive circuit is coupled to both the secondary-side circuit and a second controller, so that the second controller can adjust the secondary-side circuit in the DC-DC converter by controlling the secondary-side drive circuit.

[0093] In addition, the power conversion circuit may also include an output detection circuit for the DC-DC circuit. This output detection circuit is coupled to the output terminal of the DC-DC circuit and the second controller. In this way, the second controller can detect the output information such as the output voltage and / or output current of the DC-DC circuit through the output detection circuit.

[0094] like Figure 2 As shown, based on this power conversion circuit, a control method according to an embodiment of this application includes steps 201-202.

[0095] Step 201: The second controller acquires the output information of the load adjustment circuit and generates a first pulse signal.

[0096] In this embodiment, the output terminal of the load adjustment circuit can be coupled to the load. Therefore, the output information of the load adjustment circuit can include load-related information, such as load voltage and / or load current. For example, the output terminal of the load adjustment circuit can be the output terminal of a DC-DC circuit. In this case, the load voltage can be the voltage at the output terminal of the DC-DC circuit, and the load current can be determined by sampling the output current corresponding to the output terminal of the DC-DC circuit.

[0097] Based on this output information, a first pulse signal can be generated. This first pulse signal is used to implement feedback from the second controller to the first controller.

[0098] For example, in one example, the second controller can obtain feedback information to the first controller based on the output information, and describe the feedback information through a first pulse signal. In another example, the first pulse signal can be used to describe the output information, so that the first controller can obtain the output information based on the first pulse signal and determine the adjustment method for the source adjustment circuit based on the output information.

[0099] The specific method by which the second controller provides feedback to the first controller via the first pulse signal is not specified here.

[0100] In one example, the feedback information from the second controller to the first controller can be described by one or more pulse parameters (e.g., pulse frequency and / or operating time within each pulse cycle) in the first pulse signal. The specific content of this feedback information is not limited here. For example, the feedback information may include information such as the expected value of the target parameter in the source adjustment circuit, determined by the second controller based on the output information of the load adjustment circuit; or, the feedback information may include the output information of the load adjustment circuit.

[0101] Step 202: The first controller receives the first pulse signal through the pulse transmission unit and controls the source adjustment circuit according to the first pulse signal so that the source adjustment circuit is adjusted.

[0102] Compared to traditional power conversion circuits, in this embodiment, the second controller transmits a first pulse signal to the first controller through a pulse transmission unit, which can efficiently transmit feedback information to the first controller, thereby enabling the first controller to respond and control the output status at high speed.

[0103] Specifically, in traditional power controllers, the feedback control based on the output information of the subsequent circuit has a long delay and slow feedback speed, resulting in large ripple in the circuit.

[0104] This introduction will take a power controller that includes PFC and DC-DC circuits as an example.

[0105] In traditional power controllers that include PFC and DC-DC circuits, the control loops for the PFC circuit and the DC-DC circuit are not interconnected. Therefore, the PFC circuit cannot adjust in a timely manner according to changes in the load.

[0106] For example, if the second controller needs to send instructions to the first controller to change the output voltage of the PFC circuit, currently, communication between the second and first controllers is typically achieved via a power management bus (PMBus). This communication is based on PMBus protocols, where the second controller might send feedback to the first controller regarding the desired output voltage of the PFC circuit. However, this communication method introduces significant latency. The long delay in feedback from the second controller to the first controller results in a slow feedback speed, causing the load regulation circuit to be unable to respond promptly to changes in the load. Consequently, the output voltage of the load regulation circuit is difficult to adjust in a timely manner, resulting in large fluctuations and significant ripple.

[0107] In this embodiment, a pulse transmission unit can be used to transmit information from the second controller to the first controller in the form of a first pulse signal. This allows for high-speed transmission of the first pulse signal between the second and first controllers, enabling the first controller to control the source adjustment circuit based on the first pulse signal. This allows the source adjustment circuit to respond quickly to changes in the output, thereby suppressing ripple variations in the power conversion circuit caused by disturbances such as load at the output, reducing the demand for components such as output capacitors, and ultimately reducing the size of the components.

[0108] The pulse transmission unit can realize bidirectional transmission of pulse signals between the first controller and the second controller, or it can only realize unidirectional pulse signal transmission.

[0109] The specific form and structure of the pulse transmission unit are not limited here.

[0110] For example, the pulse transmission unit can be a transformer to realize the transmission of pulse signals between the primary and secondary circuits of the transformer based on electromagnetic induction, thereby transmitting the first pulse signal from the first controller to the second controller; or, the pulse transmission unit can be an optocoupler to convert the input pulse signal into an optical signal through the light-emitting diode in the optocoupler, then transmit it to the phototube and convert the optical signal back into a pulse signal through photoelectric conversion, and output it to the first controller.

[0111] In some embodiments, the load adjustment circuit is an isolated circuit, and the pulse transmission unit transmits the first pulse signal through an electrically isolated device.

[0112] Among them, the isolated load regulation circuit can effectively isolate the input terminal and the load terminal of the power conversion circuit, thereby better ensuring the safety of the power conversion circuit.

[0113] This load adjustment circuit typically includes a transformer to achieve electrical isolation. In this case, the power supplies for the first and second controllers are usually not grounded. Therefore, to enable pulse signal transmission between the first and second controllers, a pulse transmission unit transmits the pulse signal through electrically isolated devices.

[0114] Electrical isolation, also known as electrical isolation, refers to the method of preventing current from flowing directly from one area to another in a circuit; that is, not establishing a direct path for current flow between two areas. In the embodiments of this application, the pulse transmission unit can transmit pulse signals through electrically isolated devices.

[0115] For example, electrically isolated devices may include one or more of the following: transformers, optocouplers, capacitive couplers, and magnetic couplers.

[0116] For example, the pulse transmission unit can be a transformer to transmit pulse signals between the primary and secondary circuits of the transformer based on electromagnetic induction, thereby transmitting the first pulse signal from the first controller to the second controller; or, the pulse transmission unit can be an optocoupler to convert the input pulse signal into an optical signal through a light-emitting diode in the optocoupler, then transmit it to a phototransistor, and convert the optical signal back into a pulse signal through photoelectric conversion, and output it to the first controller. The specific type of electrically isolated device is not limited in the embodiments of this application.

[0117] like Figure 3 The diagram shown is an exemplary schematic of a first controller, a second controller, and a pulse transmission unit.

[0118] The power supplies of the first controller and the second controller are not grounded, and the pulse transmission unit includes electrically isolated devices.

[0119] The second controller can generate a first pulse signal based on the output information and transmit the first pulse signal to the first controller through a pulse transmission unit including electrically isolated devices. After receiving the first pulse signal, the first controller can control the source adjustment circuit based on the first pulse signal and the input and / or output information of the source adjustment circuit (e.g., information on the AC power input to the source adjustment circuit and / or the current output voltage of the source adjustment circuit). Furthermore, the second controller can also perform feedback control on the load adjustment circuit; for example, the second controller can also control the secondary circuit of the DC-DC converter circuit based on the output information.

[0120] The specific form of the first pulse signal and related embodiments of the control method based on the first pulse signal are described below.

[0121] In some embodiments, the first pulse parameter of the first pulse signal is used to describe the expected value of the target parameter in the source adjustment circuit.

[0122] Based on this, such as Figure 4 As shown, one control method according to an embodiment of this application includes steps 401-404.

[0123] Step 401: The second controller generates a first pulse signal based on the output information of the load adjustment circuit.

[0124] After obtaining the output information, a first pulse signal can be generated based on the output information, so as to describe the expected value of the target parameter in the source adjustment circuit through the first pulse parameter corresponding to the first pulse signal.

[0125] This target parameter can be the control parameter of the first controller for the source adjustment circuit.

[0126] For example, in one instance, the source regulation circuit includes a PFC circuit, and the target parameter can be the output voltage at the output terminal of the PFC circuit. In this case, the desired value can refer to the desired voltage at the output terminal of the PFC circuit.

[0127] In another example, the source adjustment circuit includes the primary circuit of the DC-DC circuit. The target parameter can be a certain control parameter of the switching device in the primary circuit of the DC-DC circuit (such as the frequency or duty cycle of the switching device). In this case, the expected value can refer to the expected value of the control parameter of the switching device in the primary circuit.

[0128] The expectation value of this target parameter being related to the output information can mean that the expectation value is determined based on the output information. The expectation value of this target parameter can vary depending on the load conditions.

[0129] The first pulse signal and its corresponding parameters are described below.

[0130] In this embodiment of the application, the expected value of the target parameter can be described by the values ​​of one or more first pulse parameters of the first pulse signal. In this way, after receiving the first pulse signal, the first controller can determine the expected value of the target parameter based on the specific values ​​of the one or more first pulse parameters of the received first pulse signal.

[0131] The correspondence between the first pulse parameter and the target parameter can be pre-configured in the first controller and the second controller.

[0132] The first pulse parameter can be selected in various ways, and the specific choice can be determined according to the actual application scenario. This application embodiment does not impose any restrictions on this.

[0133] In some embodiments, the first pulse parameter includes the frequency of the first pulse signal and / or the operating time of the first pulse signal in each cycle.

[0134] For example, the working time (Ton) of the first pulse signal in each cycle can be represented by the working duration of the first pulse signal in each cycle, or by the duty cycle of the first pulse signal in each cycle. That is to say, the first pulse parameter used to describe the working time of the first pulse signal in each cycle can be the duty cycle or Ton, etc.

[0135] The specific form of the first pulse signal can vary depending on the different first pulse parameters.

[0136] For example, if the first pulse parameter is the working time Ton for each cycle, then the first pulse signal may consist of only one pulse, and the pulse width of the pulse is used to describe the corresponding working time Ton. Furthermore, the pulse width of the first pulse signal (e.g., 5ms) may describe the expected value of the target parameter based on a preset correspondence.

[0137] For example, if the first pulse parameter is the frequency of the first pulse signal, then the first pulse signal may include multiple pulses, so that the first controller can determine the frequency of the first pulse signal based on the timing information of the multiple pulses.

[0138] The selection of the first pulse parameter can be determined based on the actual application scenario.

[0139] For example, the first controller controls a designated switching device in the source adjustment circuit.

[0140] In one example, the first controller controls the switching devices of the source conditioning circuit using pulse width modulation (PWM). When controlled by PWM, the switching frequency of the relevant switching devices in the circuit remains constant, while the on-time of the switches varies as required. During the control process, by controlling the on / off state of the relevant switching devices in the circuit, the width of each pulse can be modulated according to certain rules, thereby changing the output voltage of the relevant circuit (such as a PFC circuit).

[0141] At this time, the first controller can control the duty cycle of the relevant switching devices in the source adjustment circuit, that is, control the operating time Ton of the relevant switching devices in each cycle. In order to facilitate the conversion between the value of the first pulse parameter and the value of PWM control of the relevant switching devices (i.e., the relevant duty cycle or the relevant operating time Ton) by the first controller, the first pulse parameter can be the duty cycle of the first pulse signal in each cycle, or the operating time Ton of the first pulse signal in each cycle.

[0142] In another example, the first controller controls the switching devices of the source conditioning circuit using pulse frequency modulation (PFM). When controlled via PFM, the on-time of the relevant switching devices remains constant, while the switching frequency varies as required. During the control process, by controlling the on / off state of the relevant switching devices, the frequency of the pulses can be modulated according to certain rules, thereby changing the output voltage of the relevant circuit (such as a PFC circuit).

[0143] At this time, the first controller can control the switching frequency of the relevant switching devices. To facilitate the conversion between the value of the first pulse parameter and the values ​​of parameters such as the frequency for PFM control of the relevant switching devices, the first pulse parameter can be the frequency of the first pulse signal.

[0144] In yet another example, the switching control mode in the power conversion circuit can vary depending on the scenario.

[0145] For example, a power conversion circuit can use PFM mode under light load conditions and PWM mode under heavier load conditions. In this case, the first pulse parameter can be fixed or can vary accordingly.

[0146] Generally speaking, due to the limitations of the control scenario and related devices, the values ​​of the target parameters are usually restricted to a certain range. Therefore, the specific values ​​of the first pulse parameter used to describe the desired voltage are also configured within a preset range.

[0147] Step 402: The second controller sends a first pulse signal to the first controller.

[0148] At this time, the second controller can transmit the first pulse signal to the second controller via the pulse transmission unit.

[0149] Compared to traditional power conversion circuits, in this embodiment, the second controller transmits a first pulse signal to the first controller through a pulse transmission unit, which can efficiently transmit relevant information about the desired voltage to the first controller, thereby enabling the first controller to respond and control the load conditions at high speed.

[0150] Specifically, in this embodiment, a pulse transmission unit can be used to transmit information from the second controller to the first controller in the form of a first pulse signal. This allows for high-speed transmission of the first pulse signal between the second and first controllers, enabling the first controller to control the source adjustment circuit based on the desired value of the target parameter corresponding to the first pulse parameter of the first pulse signal. This allows the source adjustment circuit to respond quickly to load changes.

[0151] Step 403: The first controller receives the first pulse signal sent by the second controller.

[0152] The first controller can receive the first pulse signal transmitted through the pulse transmission unit.

[0153] Step 404: The first controller controls the source adjustment circuit according to the first pulse parameter of the first pulse signal, so that the source adjustment circuit adjusts based on the desired value.

[0154] In this embodiment of the application, after receiving the first pulse signal, the first controller can know the expected value of the target parameter of the source adjustment circuit based on the specific situation of the first pulse parameter, and thus control the device corresponding to the target parameter in the source adjustment circuit.

[0155] For example, the source adjustment circuit includes a PFC circuit. If the desired value of the target parameter is the desired voltage at the output of the PFC circuit, the first controller can control the switching devices in the PFC circuit based on PWM or PFM according to the first pulse parameter. Alternatively, the source adjustment circuit includes the primary circuit of a DC-DC circuit. If the desired value of the target parameter refers to the desired value of a certain control parameter (e.g., the frequency or duty cycle of the switching device) of the switching device in the primary circuit of the DC-DC circuit, the first controller can control the switching device in the primary circuit based on PWM or PFM according to the first pulse parameter. The first controller may pre-store the correspondence between the first pulse parameter and the corresponding switching device's frequency or duty cycle, etc. Thus, the first controller can determine the specific values ​​of the parameters for controlling the relevant switching devices based on the specific values ​​of the first pulse parameter and this correspondence, thereby controlling the relevant switching devices.

[0156] In one embodiment, step 204 above includes:

[0157] Based on the target correspondence, the expected value corresponding to the value of the first pulse parameter of the first pulse signal is calculated. The target correspondence includes the correspondence between the first pulse parameter and the target parameter.

[0158] The source adjustment circuit is controlled according to the desired value.

[0159] The target correspondence can be stored in the form of tables, etc. The target correspondence describes the relationship between the first pulse parameter and the target parameter; this correspondence can be linear or non-linear. By looking up this target correspondence, the value of the target parameter corresponding to the value of the first pulse parameter can be determined, and this corresponding target parameter value is used as the corresponding expected value. For example, if the expected value of the target parameter is the expected voltage at the output of the PFC circuit, the first controller can calculate the corresponding expected value based on the value of the first pulse parameter and the target correspondence, and then control the switching devices in the PFC circuit according to this expected value to adjust the output voltage of the PFC circuit to the expected value.

[0160] As can be seen, in this embodiment, after obtaining the output information of the load adjustment circuit, the second controller can generate a first pulse signal to describe the expected value of the target parameter in the source adjustment circuit. Then, the first pulse signal can be conveniently and quickly transmitted to the first controller via a pulse transmission unit, allowing the first controller to obtain the expected value of the corresponding target parameter based on the first pulse parameter of the first pulse signal. This enables the first controller to control the source adjustment circuit promptly based on the expected value fed back by the second controller, allowing the target parameter of the source adjustment circuit to be adjusted in a timely manner based on the output conditions. This effectively suppresses ripple changes in the power conversion circuit caused by disturbances such as the load at the output, reducing the demand for components such as output capacitors and thus reducing the component footprint.

[0161] The following provides illustrative examples of two different control scenarios.

[0162] 1. In one example, the first controller controls the output voltage of the PFC circuit in the source adjustment circuit based on a first pulse signal.

[0163] Specifically, in one embodiment, the source regulation circuit includes a PFC circuit; the input of the PFC circuit is coupled to the power supply, and the output of the PFC circuit is coupled to the input of the load regulation circuit.

[0164] The first pulse parameter corresponding to the first pulse signal is used to describe the desired voltage at the output of the PFC circuit.

[0165] Step 404 above includes:

[0166] The first controller controls the PFC circuit according to the first pulse parameter of the first pulse signal, so as to instruct the output voltage of the PFC circuit to be adjusted to the desired voltage.

[0167] In this embodiment, the output information may include load information, which describes the load condition. For example, the load information may include the voltage and / or current at the load terminal, etc. Since the output of the load adjustment circuit can provide voltage to the load, the voltage at the load terminal can be the output voltage of the load adjustment circuit, and the load current can be the output current of the load adjustment circuit.

[0168] After obtaining the load information, a first pulse signal can be generated based on the load information, so as to describe the expected voltage of the output terminal of the PFC circuit through the first pulse parameter corresponding to the first pulse signal.

[0169] In general, in a traditional PFC circuit, it is expected that the voltage at the output terminal of the PFC circuit can be stabilized at a certain specified value. For ease of description, in the embodiments of this application, this specified value is referred to as the preset PFC output voltage, or VPECREF.

[0170] In this embodiment, considering the impact of output information such as load information on the power conversion circuit, the output voltage of the PFC circuit can be adaptively adjusted according to different output conditions to optimize the control loop of the source adjustment circuit for different output conditions, thereby improving voltage fluctuations and other issues in the power conversion circuit.

[0171] The desired voltage at the output of the PFC circuit is related to the load information, and this desired voltage may change due to the influence of the load information.

[0172] Specifically, in practical applications, the output voltage and output current at the output terminal of the load regulation circuit usually change with the load.

[0173] For example, if the load increases, the equivalent resistance at the load end decreases because the load devices are connected in parallel, while the load current increases. Conversely, the load decreases. Ideally, the voltage at the load end should remain stable. However, in reality, when the load increases, the voltage applied to the load end usually tends to decrease slightly due to the decrease in the equivalent resistance at the load end, causing voltage fluctuations at the load end, which in turn causes fluctuations in the output voltage of the load regulation circuit.

[0174] In order to suppress the fluctuation of the output voltage of the load regulation circuit and thus suppress the change of ripple, the first controller can be instructed to control the PFC circuit so that when the output voltage of the load regulation circuit shows a changing trend, the output voltage of the PFC circuit can be adjusted in time. After the output voltage of the PFC circuit is transmitted to the output terminal of the load regulation circuit, the fluctuation of the output voltage of the load regulation circuit can be suppressed, thereby keeping the output voltage of the load regulation circuit stable and reducing ripple.

[0175] Therefore, in this embodiment of the application, the desired voltage corresponding to the PFC circuit can be determined according to the load conditions, and a first pulse signal can be generated to describe the desired voltage of the output terminal of the PFC circuit through the first pulse parameter corresponding to the first pulse signal.

[0176] In one embodiment, the output information includes the load amount of the load adjustment circuit;

[0177] Obtain the output information of the load adjustment circuit and generate a first pulse signal, including:

[0178] Based on the load, determine the value of the first pulse parameter of the first pulse signal;

[0179] The first pulse signal is generated based on the value of the first pulse parameter.

[0180] Here, load capacity refers to the power of the load. Since the output voltage of the load regulation circuit remains relatively stable, i.e., the load terminal voltage remains relatively stable, the load capacity can be described by the load current. The higher the load current, the higher the corresponding load capacity. In this case, the load information can include the load current, which can be determined by sampling the output current corresponding to the output terminal of the load regulation circuit.

[0181] For example, the output current at the output terminal can be sampled by an output current detection circuit, so that the second controller can determine the output current based on the sampling results. For example, each relevant sampling result can be used as the load current at the corresponding moment, or the average value of relevant sampling results over a specified time period can be calculated and used as the load current.

[0182] The load level can indicate whether the power conversion circuit is under light, medium, or heavy load conditions.

[0183] To suppress fluctuations in the output voltage of the load regulation circuit and thus reduce ripple, the first controller can be instructed to control the PFC circuit. When the output voltage of the load regulation circuit shows a trend of change with the load, the PFC circuit's output voltage can be adjusted in a timely manner. This suppresses fluctuations in the output voltage of the load regulation circuit after it is transmitted to the output terminal of the load regulation circuit, thereby stabilizing the output voltage of the load regulation circuit and reducing ripple.

[0184] For example, if the load increases and the output voltage of the load regulation circuit tends to decrease, the output voltage of the PFC circuit can be increased. After inductive coupling and other transmission processes through the transformer in the load regulation circuit, the output voltage of the load regulation circuit increases with the increase in the output voltage of the PFC circuit, thus offsetting the decreasing trend caused by the increased load. This keeps the output voltage of the load regulation circuit stable and reduces ripple. The handling process for scenarios with decreasing load is similar to that for increasing load scenarios and will not be repeated here.

[0185] Therefore, the current load condition can be determined by the load amount, and the output voltage of the PFC circuit can be adjusted adaptively to optimize the control loop of the corresponding circuit for different load conditions, thereby improving voltage fluctuations and other issues in the circuit.

[0186] In one embodiment, determining the value of the first pulse parameter of the first pulse signal based on the load includes:

[0187] Determine the target preset range corresponding to the load amount in multiple preset ranges;

[0188] Based on the target preset interval and the preset correspondence, the value of the first pulse parameter of the first pulse signal is determined. The preset correspondence includes the correspondence between each preset interval and the first pulse parameter.

[0189] For example, the load can be described by the load current, that is, the output information can include information about the load current.

[0190] After obtaining the load current, the preset range to which the load current belongs among multiple preset ranges can be determined. At this point, the preset range to which the load current belongs is the target preset range corresponding to the load quantity.

[0191] In this embodiment of the application, each preset interval can represent a load condition.

[0192] For example, multiple preset intervals include preset interval A, preset interval B, and preset interval C.

[0193] Among them, preset interval A refers to the interval where the load current is greater than I1, preset interval B refers to the interval where the load current is greater than I2 but not greater than I1, preset interval C refers to the interval where the load current is not greater than I2, and I1 is greater than I2.

[0194] At this time, preset interval A represents the case of heavy load, preset interval B represents the case of medium load, and preset interval C represents the case of light load.

[0195] After determining the preset range to which the load belongs, the value of the first pulse parameter of the first pulse signal corresponding to that preset range can be determined according to the preset correspondence. It can be understood that the value of the first pulse parameter of the first pulse signal is used to describe the desired voltage at the output terminal of the PFC circuit. For example, the value of the first pulse parameter of the first pulse signal corresponds to the preset compensation value of the PFC output voltage, or corresponds to the desired voltage itself.

[0196] This preset correspondence can be stored in the second controller in the form of a table or similar format.

[0197] The preset correspondence can take several forms. For example, it could be a direct correspondence between each preset interval and a preset value of the first pulse parameter; or it could be a correspondence between the preset interval and the output voltage of the PFC circuit, and a correspondence between the output voltage and a preset value of the first pulse parameter. Each preset interval can correspond to a preset value of the first pulse parameter, or the correspondence between the preset interval and the preset value of the first pulse parameter can be established based on a linear relationship or other functional relationship.

[0198] In one example, the preset value corresponding to the preset interval can represent the compensation value. In this case, the expected output voltage of the PFC circuit under the corresponding load condition can be the sum of the preset PFC output voltage and the compensation value. That is to say, in this example, the first pulse parameter of the first pulse signal can indicate the compensation value for the output voltage of the PFC circuit, so as to indirectly describe the expected voltage at the output terminal of the PFC circuit through the first pulse parameter.

[0199] Alternatively, the preset value corresponding to the preset range can directly indicate the expected output voltage of the PFC circuit under the corresponding load conditions. That is to say, in this example, the first pulse parameter of the first pulse signal can directly correspond to the expected voltage at the output of the PFC circuit to describe the expected voltage at the output of the PFC circuit.

[0200] By setting a preset correspondence, the desired output voltage of the PFC circuit can be determined segmentally for different load conditions. Based on this desired voltage, the PFC circuit can be controlled to adaptively adjust the corresponding desired voltage according to the circuit conditions under different conditions such as load changes (e.g., from light load to heavy load or from heavy load to light load), system heavy load, system light load, or even system no load. This ensures the stability of the power transformer's output voltage and reduces ripple.

[0201] In some embodiments, the preset correspondence includes a first correspondence between each preset interval and the output voltage of the PFC circuit, and a second correspondence between the output voltage of the PFC circuit and the first pulse parameter;

[0202] Based on the target preset interval and the preset correspondence, the values ​​of the first pulse parameters of the first pulse signal are determined, including:

[0203] Based on the target preset range and the first correspondence, determine the expected voltage at the output terminal of the PFC circuit;

[0204] Based on the desired voltage and the second correspondence, the value of the first pulse parameter of the first pulse signal is determined.

[0205] In this embodiment of the application, after determining the target preset interval, the second controller can sequentially perform data conversion based on the first correspondence and the second correspondence to obtain the value of the first pulse parameter of the first pulse signal.

[0206] The following example illustrates this.

[0207] For example, the multiple preset intervals include preset interval A, preset interval B, and preset interval C. Preset interval A represents a heavy load, preset interval B represents a medium load, and preset interval C represents a light load.

[0208] In the first correspondence, the output voltage of the PFC circuit corresponding to preset interval A is 500V, the output voltage of the PFC circuit corresponding to preset interval B is 502V, and the output voltage of the PFC circuit corresponding to preset interval C is 504V.

[0209] If the target preset interval is preset interval A, then based on the first correspondence, the expected voltage at the output terminal of the PFC circuit can be determined to be 500V.

[0210] The first pulse parameter can be the frequency of the first pulse signal.

[0211] It can be predetermined that the second correspondence between the frequency of the first pulse signal and the value of the desired voltage Vpfc* is a linear relationship.

[0212] For example, in one instance, in the second correspondence, the frequency of the first pulse signal is f*(Hz) = 1 × Vpfc*(V). In this case, if the desired voltage is 500V, then according to the second correspondence, the frequency of the first pulse signal can be determined to be 500Hz.

[0213] In this way, when the first controller receives the first pulse signal at 500Hz, it can determine that the desired voltage is 500V.

[0214] After receiving the first pulse signal and determining the desired voltage, the first controller can control the PFC circuit based on that desired voltage. The first controller can control the switching devices in the PFC circuit based on PWM or PFM to adjust the output voltage of the PFC circuit. For example, the first controller can control the switching devices in the PFC circuit based on the input voltage Vin, the output voltage Vpfc of the PFC circuit, and the desired voltage, according to a first control loop related to the PFC circuit.

[0215] The specific method by which the first controller controls the switching devices of the PFC circuit to adjust the output voltage of the PFC circuit can be found in the control methods of the current and future PFC circuits, and will not be described in detail here.

[0216] As can be seen, in the control scenario of this application embodiment, after obtaining the output information, the second controller used to control the load adjustment circuit can generate a first pulse signal to describe the expected voltage of the output voltage of the PFC circuit corresponding to the output information. Then, the first pulse signal can be conveniently and quickly transmitted to the first controller according to the pulse transmission unit, so that the first controller can know the corresponding expected voltage according to the first pulse parameter of the first pulse signal, and thus control the PFC circuit in a timely manner according to the expected voltage fed back by the second controller. This allows the output voltage of the PFC circuit to be adjusted in a timely manner based on the load condition, and then transmitted to the output terminal of the load adjustment circuit, so that the output voltage of the load adjustment circuit can also be adjusted in a timely manner based on the load condition. This timely suppression of ripple changes caused by load disturbances reduces the demand for components such as output capacitors, thereby reducing the size of the components.

[0217] 2. In one example, the first controller controls the primary circuit in the DC-DC circuit based on the first pulse signal.

[0218] Specifically, in one embodiment, the load adjustment circuit includes the secondary side circuit of the DC-DC circuit, and the source adjustment circuit includes the PFC circuit and the primary side circuit of the DC-DC circuit.

[0219] The input terminal of the PFC circuit is coupled to the power supply, the output terminal of the PFC circuit is coupled to the input terminal of the primary circuit, and the output terminal of the primary circuit is coupled to the input terminal of the secondary circuit.

[0220] The first pulse parameter corresponding to the first pulse signal is used to describe the expected value of the control parameter of the primary circuit;

[0221] Step 204 above includes:

[0222] The first controller controls the primary circuit based on the first pulse parameter of the first pulse signal, so as to instruct the control parameters of the primary circuit to be adjusted based on the desired value.

[0223] In this embodiment of the application, a transformer can be used in the DC-DC circuit to transfer energy from the primary winding of the transformer to the secondary winding through inductive coupling. The ratio between the input voltage and the output voltage of the transformer can be based on the turns ratio between the primary winding and the secondary winding of the transformer.

[0224] By using a transformer, the load terminal and the power input terminal (i.e., the input terminal of the power conversion circuit) can be electrically isolated, thereby improving safety. In this case, the DC-DC circuit can be an isolated DC-DC circuit.

[0225] At this point, the primary circuit of the DC-DC circuit may include the first winding of the transformer, while the secondary circuit of the DC-DC circuit may include the second winding of the transformer.

[0226] In current traditional technologies, the control loop of the DC-DC circuit is usually controlled by a second controller. In other words, the primary circuit needs to be controlled by a second controller to make the loop control of the DC-DC circuit more accurate.

[0227] However, typically the second controller shares a common ground with the output of the DC-DC circuit, the secondary circuit shares a common ground with the output of the DC-DC circuit, but the primary circuit does not share a common ground with the output of the DC-DC circuit. Therefore, the second controller does not share a common ground with the primary circuit.

[0228] Therefore, in current conventional technologies, the second controller typically needs to control the primary-side circuit through an isolated drive circuit. This drive circuit is usually quite complex and occupies a large area. Furthermore, in current conventional technologies, due to the significant communication delay between the first and second controllers, the response speed of the primary-side circuit in the DC-DC converter to load changes is not synchronized with the response of the PFC circuit, and the time difference is large. This results in a mismatch between the control methods of the primary-side circuit and the control methods of the PFC circuit and other components, leading to large fluctuations in the output voltage of the power conversion circuit.

[0229] To address the aforementioned issues, in this embodiment, a first pulse signal can be transmitted from the second controller to the first controller via a pulse transmission unit. This allows the first controller to control the primary circuit in the DC-DC circuit based on the first pulse parameter of the first pulse signal. Consequently, the output of the primary circuit changes in a timely manner based on the circuit's changes, thus better meeting actual requirements.

[0230] In some embodiments, the control method further includes:

[0231] The first controller acquires the first output voltage of the PFC circuit;

[0232] The first controller transmits a second pulse signal to the second controller, and the second pulse parameter of the second pulse signal is used to describe the first output voltage.

[0233] The second controller generates the first pulse signal based on the output information of the load adjustment circuit and the second pulse parameter of the second pulse signal.

[0234] The output terminal of the PFC circuit can be connected to the first controller through the corresponding output voltage detection circuit of the PFC circuit, so that the first controller can obtain the first output voltage of the output terminal of the PFC circuit through the output voltage detection circuit.

[0235] The timing for the output voltage detection circuit to detect the output voltage of the PFC circuit can be determined according to the actual application scenario, and this application embodiment does not impose any restrictions on this.

[0236] For example, the output voltage detection circuit can sample the PFC circuit in real time to obtain the real-time output voltage of the PFC circuit based on the corresponding sampling results, and use each detected output voltage as a first output voltage to perform the operation of this embodiment once. Alternatively, the output voltage of the PFC circuit can be detected at a specified period to obtain a first output voltage and perform the operation of this embodiment once. Alternatively, the operation of detecting the output voltage of the PFC circuit can be triggered after receiving the indication signal from the first controller to obtain a first output voltage and perform the operation of this embodiment once.

[0237] After acquiring the first output voltage, the first controller can generate a second pulse signal and transmit it to the second controller via a pulse transmission unit. This allows the second controller to understand the specific content of the first output voltage based on information such as the specific values ​​of the second pulse parameters of the second pulse signal. In this way, the second controller can determine the desired values ​​of the control parameters for the primary circuit based on the output information of the load adjustment circuit and the first output voltage, and then generate the first pulse signal accordingly.

[0238] The second pulse signal is similar to the first pulse signal described above, and the second pulse parameters are also similar to the first pulse signal described above. The possible implementation methods of the second pulse signal and the second pulse parameters can be referred to the relevant descriptions of the first pulse signal and the first pulse parameters described above, and will not be repeated in this embodiment.

[0239] Furthermore, the first output voltage can be the input voltage of the primary circuit, and the output information of the load adjustment circuit can be the output information of the DC-DC circuit. The specific method by which the second controller determines the control data of the primary circuit of the transformer of the DC-DC circuit based on the first output voltage and the output information of the DC-DC circuit is not limited here.

[0240] like Figure 5 The diagram shown is an exemplary schematic of a power conversion circuit.

[0241] In this circuit, the input voltage of the PFC circuit is Vin, and the output voltage is Vpfc. Vpfc detected at different times may be used as either the first output voltage or the second output voltage. The first controller can detect Vin through the input detection circuit and Vpfc through the PFC output voltage detection circuit. Furthermore, the first and second controllers can transmit pulse signals based on a pulse transmission unit. For example, the first controller can transmit a second pulse signal to the second controller through the pulse transmission unit, and the second controller can transmit a first pulse signal to the first controller through the pulse transmission unit.

[0242] Furthermore, the first controller can determine the desired voltage at the output of the PFC circuit based on the first pulse signal, and control the PFC circuit through the PFC drive circuit based on the desired voltage. Specifically, control parameters such as the frequency or operating time of the relevant switching devices in the PFC circuit can be determined based on the desired voltage and Vin, and the relevant switching devices can be controlled through the PFC drive circuit. The specific method for determining the control parameters such as the frequency or operating time of the relevant switching devices in the PFC circuit based on the desired voltage and Vin can refer to current and future related technologies, and this application embodiment does not limit this. Alternatively, the desired value of the relevant control parameters of the primary circuit of the DC-DC circuit can be determined based on the first pulse signal, and the relevant control parameters of the primary circuit in the DC-DC circuit can be controlled through the primary drive circuit.

[0243] The output voltage of the second controller can be referred to as Vout. The second controller can detect the output voltage and / or output current of the DCDC circuit via the output detection circuit of the DCDC circuit. Furthermore, the second controller can control the secondary circuit in the DCDC circuit via the secondary-side drive circuit. The specific method by which the second controller controls the secondary circuit in the DCDC circuit via the secondary-side drive circuit can refer to current and future related technologies; this application does not limit this approach.

[0244] For example, such as Figure 6 The diagram shown is an exemplary flowchart for determining the desired values ​​of the control parameters for the primary side circuit of a DC-DC circuit.

[0245] In practical applications, it is generally desirable for the output voltage of a DC-DC circuit to be a preset desired load voltage, in order to provide a stable load voltage to the load. Figure 6The output voltage Vout of the DC-DC circuit is VoutREF. However, in practical applications, the output voltage Vout of the DC-DC circuit is likely to change. In this case, the second controller can detect Vout through the output voltage sampling circuit of the DC-DC circuit, and input Vout and VoutREF into the PID controller to obtain the output of the PID controller. Then, based on the output of the PID controller, the first output voltage, and the current control loop of the DC-DC circuit, the expected value of the control parameters of the primary-side switch of the DC-DC circuit is obtained, and a first pulse signal is generated based on the expected value to be transmitted to the first controller. The first output voltage can be used as a correction coefficient to process the output of the PID controller to correct the output of the PID controller based on the current state of the PFC circuit.

[0246] In the embodiments of this application, the current control loop of the DCDC circuit and the specific information processing flow of the PID controller can refer to the relevant technologies that are currently or will be developed in the future.

[0247] In this embodiment, the first controller and the second controller can efficiently transmit information through a pulse transmission unit. Based on this information transmission, the first controller and the second controller can achieve efficient active control of the corresponding circuit parts, reducing voltage fluctuations at the output terminal, thereby reducing ripple and reducing the capacity requirements of components such as output terminal capacitors. This allows for effective reduction of circuit size while ensuring circuit performance, which is beneficial for miniaturization of the circuit.

[0248] In some embodiments, the above step: the first controller controls the primary circuit according to the first pulse parameter of the first pulse signal to instruct the control parameters of the primary circuit to be adjusted based on the desired value, including:

[0249] After receiving the first pulse signal, the first controller obtains the second output voltage of the PFC circuit;

[0250] The first controller obtains the target coefficient based on the difference between the second output voltage and the first output voltage;

[0251] The first controller corrects the expected value indicated by the first pulse signal based on the target coefficient to obtain the target value of the control parameter;

[0252] The first controller controls the primary circuit according to the target value.

[0253] Specifically, in this embodiment of the application, the first controller can control the primary circuit according to the target coefficient.

[0254] The target coefficient is obtained based on the difference between the first output voltage and the second output voltage, which can describe the deviation of the expected value of the control parameter indicated by the first pulse parameter. Thus, based on the first pulse parameter and the target coefficient, the expected value can be corrected to obtain the target value, so that the first controller can control the primary circuit more accurately according to the target value.

[0255] It is understandable that if the moment when the first controller receives the first pulse signal is taken as the current moment, then when the first controller receives the first pulse signal, since the expected value indicated by the first pulse parameter of the first pulse signal is calculated based on the first output voltage detected before the current moment, but the output voltage of the PFC circuit may have changed at the current moment, therefore, in this embodiment, the second output voltage of the PFC circuit can be obtained again at the current moment, and the expected value can be corrected based on the difference between the first output voltage and the second output voltage at the current moment, so as to obtain control data that is more in line with the current state of the PFC circuit, thereby controlling the primary circuit more accurately, stabilizing the circuit voltage in a timely manner, and improving the circuit performance.

[0256] The specific calculation method for this target coefficient is not specified here.

[0257] In one example, the difference or ratio between the first output voltage and the second output voltage can be used as the target coefficient, or the target coefficient can be calculated through other operations.

[0258] For example, if the first output voltage is 500V and the second output voltage is 502V, then 502 / 500 = 1.004 can be used as the target coefficient.

[0259] After obtaining the target coefficient, the primary circuit in the DC-DC circuit can be controlled based on the target coefficient.

[0260] For example, based on the target coefficient, the switching devices corresponding to the primary circuit can be controlled based on PWM or PFM to adjust the output voltage of the primary circuit.

[0261] The specific methods for controlling the switching devices in the primary circuit to adjust the output voltage of the primary circuit can be found in the current and future developments of control methods for the switching devices in the primary circuit, and will not be described in detail here.

[0262] In one embodiment, the power conversion circuit further includes a primary-side driving circuit for driving the primary-side circuit.

[0263] The primary-side drive circuit is coupled to the first controller, and the power supply of the primary-side drive circuit and the power supply of the first controller share a common ground.

[0264] Step 404 above includes:

[0265] Based on the first pulse parameters of the first pulse signal, the primary-side drive circuit is controlled to instruct the control parameters of the primary-side circuit to be adjusted based on the desired value.

[0266] In this embodiment of the application, the first controller can control the primary-side driving circuit corresponding to the primary-side circuit so that the primary-side driving circuit drives the primary-side circuit.

[0267] The primary-side drive circuit driving the primary-side circuit can refer to the drive circuit driving the switching devices in the primary-side circuit to open and close at a specified frequency and / or duty cycle.

[0268] Since the first controller can share a common ground with the PFC circuit, and the PFC circuit can share a common ground with the primary-side circuit, it can be seen that when the primary-side circuit is driven by the primary-side driving circuit, the first controller can share a common ground with the primary-side driving circuit.

[0269] In current conventional technologies, the second controller typically requires an isolated drive circuit to control the primary circuit. This drive circuit is usually complex and occupies a significant amount of space. Furthermore, in current conventional technologies, due to the substantial communication delay between the first and second controllers, the response speed of the primary circuit in the DC-DC converter to load changes is not synchronized with that of the PFC circuit, and the time difference is large. This results in a mismatch between the control methods of the primary circuit and other components such as the PFC circuit, leading to large fluctuations in the output voltage of the power conversion circuit.

[0270] In this embodiment, the first controller controls the primary circuit in the transformer of the DC-DC circuit through the primary-side drive circuit based on the first pulse parameters of the first pulse signal. In this case, the power supplies of the first controller and the primary-side drive circuit share a common ground. Therefore, there is no need for a complex, bulky isolated drive circuit between the first controller and the primary-side circuit, thus reducing the size of the components in the circuit. Furthermore, this embodiment allows the output of the primary-side circuit to change promptly based on changes in the circuit, thus better meeting practical needs.

[0271] like Figure 7 The diagram shown is an exemplary schematic diagram related to the first controller and the source adjustment circuit.

[0272] The first controller shares a common ground with the primary-side drive circuit and the primary-side power supply of the pulse transmission unit, but does not share a common ground with the secondary-side power supply of the pulse transmission unit.

[0273] The first controller can control the first control loop based on the input voltage Vin, the PFC output voltage detected by the PFC output voltage detection circuit, the preset PFC output voltage VPFCREF, and the first pulse signal transmitted by the pulse transmission unit to describe the desired voltage at the output terminal of the PFC circuit, thereby controlling the PFC circuit.

[0274] Alternatively, the first controller can control the primary circuit of the DC-DC circuit through the primary-side drive circuit based on the PFC output voltage detected by the PFC output voltage detection circuit and the first pulse signal transmitted by the pulse transmission unit, which is used to describe the expected value of the control parameters of the primary circuit of the DC-DC circuit. The power supply of the primary-side drive circuit and the power supply of the first controller share a common ground.

[0275] Compared to the traditional technology of controlling the primary circuit through a second controller, in this embodiment, the primary circuit is adaptively and actively controlled by a first controller based on the target coefficient and the first pulse parameter. This allows the output voltage of the primary circuit to adapt to changes in the output voltage of the PFC circuit in a timely manner, thereby greatly improving the circuit's response speed, stabilizing the circuit voltage in a timely manner, and improving circuit performance.

[0276] It should be noted that, in the embodiments of this application, the power conversion circuit can realize any of the above control scenarios, or it can realize both the first control scenario and the second control scenario.

[0277] Specifically, in some embodiments, the source adjustment circuit includes multiple target parameters, and the frequency band of the first pulse signal corresponding to different target parameters is different. Among them, the multiple target parameters include the expected voltage at the output of the PFC circuit and the expected value of the control parameters of the primary circuit.

[0278] For example, when the power conversion circuit can realize both the first control scenario and the second control scenario, the second controller can transmit different first pulse signals to the first controller based on different control scenarios. At this time, the frequency band and other parameters of the first pulse signal in different control scenarios can be different, so that the first controller can determine whether the first pulse parameter in the first pulse signal describes the expected voltage at the output terminal of the PFC circuit or the expected value of the control parameter of the primary circuit of the DC-DC circuit based on the frequency band and other parameters, and thus perform corresponding control.

[0279] Furthermore, the timing relationship between the first and second control scenarios is not limited here. In one example, the second control scenario can be implemented by acquiring the first output voltage of the PFC circuit during the process of the first controller controlling the PFC circuit. In another example, the two can be controlled separately based on different control cycles.

[0280] The control method has been described above from multiple aspects in the embodiments of this application. The control device applied to the second controller and the control device applied to the first controller of this application are described below with reference to the accompanying drawings.

[0281] like Figure 8 As shown, this application embodiment provides a control device 80, which can be applied to the second controller in the power conversion circuit of the above embodiment. The power conversion circuit further includes a source adjustment circuit, a load adjustment circuit, a first controller for controlling the operation of the source adjustment circuit, and a second controller for controlling the operation of the load adjustment circuit. The input terminal of the source adjustment circuit is coupled to the power supply, and the output terminal of the source adjustment circuit is coupled to the input terminal of the load adjustment circuit. The output terminal of the load adjustment circuit is coupled to the output terminal of the power conversion circuit.

[0282] One embodiment of the device 80 includes:

[0283] The generation module 801 is used to acquire the output information of the load adjustment circuit and generate a first pulse signal. The first pulse parameter of the first pulse signal is used to describe the expected value of the target parameter in the source adjustment circuit.

[0284] The transmitting module 802 is used to transmit a first pulse signal to a first controller, so that the first controller controls the source adjustment circuit according to the first pulse parameter of the first pulse signal, wherein the source adjustment circuit adjusts based on the desired value.

[0285] Optionally, the source adjustment circuit includes a PFC circuit, and the first pulse parameter corresponding to the first pulse signal is used to describe the desired voltage at the output of the PFC circuit.

[0286] Optionally, the output information includes the load amount of the load adjustment circuit;

[0287] Generation module 801 is used for:

[0288] Based on the load, determine the value of the first pulse parameter of the first pulse signal;

[0289] The first pulse signal is generated based on the value of the first pulse parameter.

[0290] Optionally, the generation module 801 is used for:

[0291] Determine the target preset range corresponding to the load amount in multiple preset ranges;

[0292] Based on the target preset interval and the preset correspondence, the value of the first pulse parameter of the first pulse signal is determined. The preset correspondence includes the correspondence between each preset interval and the first pulse parameter.

[0293] Optionally, the preset correspondence includes a first correspondence between each preset interval and the output voltage of the PFC circuit, and a second correspondence between the output voltage of the PFC circuit and the first pulse parameter;

[0294] Generation module 801 is used for:

[0295] Based on the target preset range and the first correspondence, determine the expected voltage at the output terminal of the PFC circuit;

[0296] Based on the desired voltage and the second correspondence, the value of the first pulse parameter of the first pulse signal is determined.

[0297] Optionally, the load regulation circuit includes the secondary circuit of the DC-DC circuit, and the source regulation circuit includes the PFC circuit and the primary circuit of the DC-DC circuit.

[0298] The first pulse parameter corresponding to the first pulse signal is used to describe the expected value of the control parameter of the primary circuit.

[0299] Optionally, the control device 80 further includes:

[0300] The receiving module 803 is used to receive the second pulse signal transmitted by the first controller through the pulse transmission unit. The second pulse parameter of the second pulse signal is used to describe the first output voltage of the PFC circuit.

[0301] Generation module 801 is used for:

[0302] The first pulse signal is generated based on the output information and the second pulse parameter of the second pulse signal.

[0303] like Figure 9 As shown, this application embodiment provides a control device 90, which can be applied to the first controller in the power conversion circuit of the above embodiment. The power conversion circuit further includes a source adjustment circuit, a load adjustment circuit, and a second controller for controlling the operation of the load adjustment circuit. The first controller is used to control the operation of the source adjustment circuit. The input terminal of the source adjustment circuit is coupled to the power supply, and the output terminal of the source adjustment circuit is coupled to the input terminal of the load adjustment circuit. The output terminal of the load adjustment circuit is coupled to the output terminal of the power conversion circuit.

[0304] One embodiment of the device 90 includes:

[0305] The receiving module 901 is used to receive a first pulse signal transmitted by the second controller. The first pulse signal is generated based on the output information of the load adjustment circuit. The first pulse parameter of the first pulse signal is used to describe the expected value of the target parameter in the source adjustment circuit.

[0306] The control module 902 is used to control the source adjustment circuit according to the first pulse parameter of the first pulse signal, so that the source adjustment circuit adjusts based on the desired value.

[0307] Optionally, the control module 902 is used for:

[0308] Based on the target correspondence, the expected value corresponding to the value of the first pulse parameter of the first pulse signal is calculated. The target correspondence includes the correspondence between the first pulse parameter and the target parameter.

[0309] The source adjustment circuit is controlled according to the desired value.

[0310] Optionally, the source adjustment circuit includes a power factor correction (PFC) circuit, and the first pulse parameter corresponding to the first pulse signal is used to describe the desired voltage at the output of the PFC circuit.

[0311] Control module 902 is used for:

[0312] The PFC circuit is controlled according to the first pulse parameters of the first pulse signal to instruct the output voltage of the PFC circuit to be adjusted to the desired voltage.

[0313] Optionally, the load regulation circuit includes the secondary circuit of the DC-DC circuit, and the source regulation circuit includes the PFC circuit and the primary circuit of the DC-DC circuit.

[0314] Control module 902 is used for:

[0315] Based on the first pulse parameters of the first pulse signal, the primary circuit is controlled to instruct the control parameters of the primary circuit to be adjusted based on the desired value.

[0316] Optionally, the control device 90 further includes:

[0317] The acquisition module 903 is used to acquire the first output voltage of the PFC circuit;

[0318] The transmission module 904 is used to transmit a second pulse signal to the second controller. The second pulse parameter of the second pulse signal is used to describe the first output voltage, so that the second controller generates the first pulse signal according to the output information and the second pulse parameter of the second pulse signal.

[0319] Optionally, the control module 902 is used for:

[0320] After receiving the first pulse signal, the second output voltage of the PFC circuit is obtained;

[0321] The target coefficient is obtained based on the difference between the second output voltage and the first output voltage;

[0322] Based on the target coefficient, the expected value indicated by the first pulse signal is corrected to obtain the target value of the control parameter;

[0323] The primary circuit is controlled according to the target value.

[0324] Figure 10 The diagram shown is a possible logical structure of the controller 100 provided in an embodiment of this application. The controller 100 is used to implement the functions of the first controller involved in any of the above embodiments. The controller 100 includes: a memory 1001, a processor 1002, a communication interface 1003, and a bus 1004. The memory 1001, processor 1002, and communication interface 1003 are interconnected via the bus 1004.

[0325] The memory 1001 may be a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1001 may store a program. When the program stored in the memory 1001 is executed by the processor 1002, the processor 1002 and the communication interface 1003 are used to execute steps 201, 401, and 402, etc., of the control method embodiment described above.

[0326] The processor 1002 can be a central processing unit (CPU), microprocessor, application-specific integrated circuit (ASIC), graphics processing unit (GPU), digital signal processor (DSP), field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any combination thereof, to execute relevant programs to achieve the functions required by the generation module, transmission module, and receiving module in the control device applied to the first controller in the above embodiments, or to execute steps 201, 401, and 402 of the control method embodiments of this application. The steps of the method disclosed in the embodiments of this application can be directly embodied in the execution of the hardware decoding processor, or the execution of the hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 1001. Processor 1002 reads the information in memory 1001 and executes steps 201, 401, and 402 of the above-described control method embodiment in conjunction with its hardware.

[0327] The communication interface 1003 uses a transceiver device, such as, but not limited to, a transceiver, to enable communication between the controller 100 and other devices or communication networks.

[0328] Bus 1004 enables the transmission of information between various components of controller 100 (e.g., memory 1001, processor 1002, and communication interface 1003). Bus 1004 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 10 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0329] In another embodiment of this application, a computer-readable storage medium is also provided, which stores computer-executable instructions. When the processor of the device executes the computer-executable instructions, the device performs the aforementioned... Figure 10 The steps performed by the processor in the process.

[0330] In another embodiment of this application, a computer program product is also provided, which includes computer-executable instructions stored in a computer-readable storage medium; when the processor of the device executes the computer-executable instructions, the device performs the above-described... Figure 10 The steps performed by the processor in the process.

[0331] In another embodiment of this application, a chip system is also provided, the chip system including a processor for implementing the above. Figure 10 The steps performed by the processor. In one possible design, the chip system may also include a memory for storing program instructions and data necessary for data writing. The chip system may consist of chips or may include chips and other discrete components.

[0332] Figure 11 The diagram shown is a possible logical structure of the controller 110 provided in an embodiment of this application. The controller 110 is used to implement the functions of the second controller involved in any of the above embodiments. The controller 110 includes: a memory 1101, a processor 1102, a communication interface 1103, and a bus 1104. The memory 1101, processor 1102, and communication interface 1103 are interconnected via the bus 1104.

[0333] The memory 1101 may be a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1101 may store a program. When the program stored in the memory 1101 is executed by the processor 1102, the processor 1102 and the communication interface 1103 are used to execute steps 202, 403, and 404, etc., of the control method embodiment described above.

[0334] The processor 1102 can be a central processing unit (CPU), microprocessor, application-specific integrated circuit (ASIC), graphics processing unit (GPU), digital signal processor (DSP), field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any combination thereof, to execute relevant programs to achieve the functions required by the acquisition module, transmission module, receiving module, and control module in the control device applied to the second controller in the above embodiments, or to execute steps 202, 403, and 404 of the control method embodiments of this application. The steps of the method disclosed in the embodiments of this application can be directly embodied in the execution of the hardware decoding processor, or the execution of the hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 1101. Processor 1102 reads the information in memory 1101 and executes steps 202, 403, and 404 of the above-described control method embodiment in conjunction with its hardware.

[0335] The communication interface 1103 uses a transceiver device, such as, but not limited to, a transceiver, to enable communication between the controller 110 and other devices or communication networks.

[0336] Bus 1104 enables the transmission of information between various components of controller 110 (e.g., memory 1101, processor 1102, and communication interface 1103). Bus 1104 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 11 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0337] In another embodiment of this application, a computer-readable storage medium is also provided, which stores computer-executable instructions. When the processor of the device executes the computer-executable instructions, the device performs the aforementioned... Figure 11 The steps performed by the processor in the process.

[0338] In another embodiment of this application, a computer program product is also provided, which includes computer-executable instructions stored in a computer-readable storage medium; when the processor of the device executes the computer-executable instructions, the device performs the above-described... Figure 11 The steps performed by the processor in the process.

[0339] In another embodiment of this application, a chip system is also provided, the chip system including a processor for implementing the above. Figure 11 The steps performed by the processor. In one possible design, the chip system may also include a memory for storing program instructions and data necessary for data writing. The chip system may consist of chips or may include chips and other discrete components.

[0340] In another embodiment of this application, an electronic device is also provided, such as Figure 12 As shown, the electronic device may include the power conversion circuit described in any of the above embodiments. The type of electronic device is not limited herein. Exemplarily, the electronic device may be a server or a terminal device. Exemplarily, the electronic device may be one or more of a mobile phone, tablet computer, computer with wireless transceiver capabilities, network device, virtual reality (VR) terminal, augmented reality (AR) terminal, etc. The power conversion circuit in the electronic device may be coupled to a load located inside and / or outside the electronic device.

[0341] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this application.

[0342] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0343] In the embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0344] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0345] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0346] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of this application, essentially, or the parts that contribute to the prior art, or parts of the technical solutions, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0347] The above are merely specific implementation methods of the embodiments of this application, but the protection scope of the embodiments of this application is not limited thereto.

Claims

1. A power conversion circuit, characterized in that, The power conversion circuit includes a source adjustment circuit, a load adjustment circuit, a first controller for controlling the operation of the source adjustment circuit, a second controller for controlling the operation of the load adjustment circuit, and a pulse transmission unit; the input terminal of the source adjustment circuit is coupled to the power supply, and the output terminal of the source adjustment circuit is coupled to the input terminal of the load adjustment circuit. The output terminal of the load adjustment circuit is coupled to the output terminal of the power conversion circuit. The first controller is coupled to the second controller via the pulse transmission unit; wherein: The second controller is used to acquire the output information of the load adjustment circuit and generate a first pulse signal. The first pulse parameter of the first pulse signal is used to describe the expected value of the target parameter in the source adjustment circuit. The first controller is configured to receive the first pulse signal through the pulse transmission unit and control the source adjustment circuit according to the first pulse parameter of the first pulse signal, so that the source adjustment circuit adjusts based on the desired value.

2. The power conversion circuit according to claim 1, characterized in that, The source regulation circuit includes a PFC circuit; the input terminal of the PFC circuit is coupled to the power supply, and the output terminal of the PFC circuit is coupled to the input terminal of the load regulation circuit. The first pulse parameter corresponding to the first pulse signal is used to describe the desired voltage at the output terminal of the PFC circuit; The first controller is used to control the PFC circuit according to the first pulse parameter of the first pulse signal, so as to instruct the output voltage of the PFC circuit to be adjusted to the desired voltage.

3. The power conversion circuit according to claim 2, characterized in that, The source adjustment circuit further includes a PFC driving circuit, which is used to drive the PFC circuit. The PFC drive circuit is coupled to the first controller, which controls the PFC drive circuit according to the first pulse parameter of the first pulse signal to instruct the output voltage of the PFC circuit to be adjusted to the desired voltage.

4. The power conversion circuit according to claim 1, characterized in that, The load adjustment circuit includes the secondary side circuit of the DC-DC circuit, and the source adjustment circuit includes the PFC circuit and the primary side circuit of the DC-DC circuit. The input terminal of the PFC circuit is coupled to the power supply, the output terminal of the PFC circuit is coupled to the input terminal of the primary circuit, and the output terminal of the primary circuit is coupled to the input terminal of the secondary circuit. The first pulse parameter corresponding to the first pulse signal is used to describe the expected value of the control parameter of the primary circuit; The first controller is used for: The primary circuit is controlled according to the first pulse parameter of the first pulse signal to instruct the control parameters of the primary circuit to be adjusted based on the desired value.

5. The power conversion circuit according to claim 4, characterized in that, The power conversion circuit further includes a primary-side driving circuit, which is used to drive the primary-side circuit. The primary-side drive circuit is coupled to the first controller, and the power supply of the primary-side drive circuit and the power supply of the first controller share a common ground. The first controller is used to control the primary-side driving circuit according to the first pulse parameter of the first pulse signal, so as to instruct the control parameters of the primary-side circuit to be adjusted based on the expected value.

6. The power conversion circuit according to any one of claims 1-5, characterized in that, The first pulse parameter includes the frequency of the first pulse signal and / or the operating time of the first pulse signal in each cycle.

7. The power conversion circuit according to any one of claims 1-5, characterized in that, The load adjustment circuit includes a secondary circuit in the DC-DC circuit, and the source adjustment circuit includes a PFC circuit and a primary circuit in the DC-DC circuit; the input terminal of the PFC circuit is coupled to the power supply, the output terminal of the PFC circuit is coupled to the input terminal of the primary circuit, and the output terminal of the primary circuit is coupled to the input terminal of the secondary circuit. The source adjustment circuit includes multiple target parameters, and the frequency band of the first pulse signal corresponding to different target parameters is different. The multiple target parameters include the expected voltage at the output terminal of the PFC circuit and the expected value of the control parameters of the primary side circuit.

8. The power conversion circuit according to any one of claims 1-5, characterized in that, The load adjustment circuit is an isolated circuit, and the pulse transmission unit transmits the first pulse signal through electrically isolated devices.

9. A control method, characterized in that, The control method is applied to a second controller in a power conversion circuit. The power conversion circuit further includes a source adjustment circuit, a load adjustment circuit, and a first controller for controlling the operation of the source adjustment circuit. The second controller is used to control the operation of the load adjustment circuit. The input terminal of the source adjustment circuit is coupled to the power supply, and the output terminal of the source adjustment circuit is coupled to the input terminal of the load adjustment circuit. The output terminal of the load adjustment circuit is coupled to the output terminal of the power conversion circuit. The control method includes: The output information of the load adjustment circuit is obtained, and a first pulse signal is generated. The first pulse parameter of the first pulse signal is used to describe the expected value of the target parameter in the source adjustment circuit. The first pulse signal is sent to the first controller so that the first controller controls the source adjustment circuit according to the first pulse parameter of the first pulse signal, wherein the source adjustment circuit is adjusted based on the desired value.

10. The control method according to claim 9, characterized in that, The source adjustment circuit includes a PFC circuit, and the first pulse parameter corresponding to the first pulse signal is used to describe the desired voltage at the output terminal of the PFC circuit.

11. The control method according to claim 10, characterized in that, The output information includes the load amount of the load adjustment circuit; The step of acquiring the output information of the load adjustment circuit and generating a first pulse signal includes: Based on the load, determine the value of the first pulse parameter of the first pulse signal; The first pulse signal is generated based on the value of the first pulse parameter.

12. The control method according to claim 11, characterized in that, Determining the value of the first pulse parameter of the first pulse signal based on the load includes: Determine the target preset interval corresponding to the load amount in multiple preset intervals; Based on the target preset interval and the preset correspondence, the value of the first pulse parameter of the first pulse signal is determined, and the preset correspondence includes the correspondence between each preset interval and the first pulse parameter.

13. The control method according to claim 12, characterized in that, The preset correspondence includes a first correspondence between each preset interval and the output voltage of the PFC circuit, and a second correspondence between the output voltage of the PFC circuit and the first pulse parameter; The step of determining the value of the first pulse parameter of the first pulse signal based on the target preset interval and the preset correspondence includes: Based on the target preset range and the first correspondence, the desired voltage at the output terminal of the PFC circuit is determined; Based on the desired voltage and the second correspondence, the value of the first pulse parameter of the first pulse signal is determined.

14. The control method according to claim 9, characterized in that, The load adjustment circuit includes the secondary side circuit of the DC-DC circuit, and the source adjustment circuit includes the PFC circuit and the primary side circuit of the DC-DC circuit. The first pulse parameter corresponding to the first pulse signal is used to describe the expected value of the control parameter of the primary circuit.

15. The control method according to claim 14, characterized in that, Also includes: The pulse transmission unit receives the second pulse signal transmitted by the first controller, and the second pulse parameter of the second pulse signal is used to describe the first output voltage of the PFC circuit. The step of acquiring the output information of the load adjustment circuit and generating a first pulse signal includes: The first pulse signal is generated based on the output information and the second pulse parameter of the second pulse signal.

16. A control method, characterized in that, The control method is applied to a first controller in a power conversion circuit. The power conversion circuit further includes a source adjustment circuit, a load adjustment circuit, and a second controller for controlling the operation of the load adjustment circuit. The first controller is used to control the operation of the source adjustment circuit. The input terminal of the source adjustment circuit is coupled to the power supply, and the output terminal of the source adjustment circuit is coupled to the input terminal of the load adjustment circuit. The output terminal of the load adjustment circuit is coupled to the output terminal of the power conversion circuit. The control method includes: The system receives a first pulse signal transmitted by the second controller. The first pulse signal is generated based on the output information of the load adjustment circuit. The first pulse parameter of the first pulse signal is used to describe the expected value of the target parameter in the source adjustment circuit. The source adjustment circuit is controlled according to the first pulse parameter of the first pulse signal so that the source adjustment circuit adjusts based on the desired value.

17. The control method according to claim 16, characterized in that, The step of controlling the source adjustment circuit according to the first pulse parameter of the first pulse signal includes: Based on the target correspondence, the expected value corresponding to the value of the first pulse parameter of the first pulse signal is calculated, wherein the target correspondence includes the correspondence between the first pulse parameter and the target parameter; The source adjustment circuit is controlled according to the desired value.

18. The control method according to claim 16 or 17, characterized in that, The source adjustment circuit includes a power factor correction (PFC) circuit, and the first pulse parameter corresponding to the first pulse signal is used to describe the desired voltage at the output terminal of the PFC circuit. The step of controlling the source adjustment circuit according to the first pulse parameter of the first pulse signal, so that the source adjustment circuit adjusts based on the desired value, includes: The PFC circuit is controlled according to the first pulse parameter of the first pulse signal to instruct the output voltage of the PFC circuit to be adjusted to the desired voltage.

19. The control method according to claim 16 or 17, characterized in that, The load adjustment circuit includes the secondary side circuit of the DC-DC circuit, and the source adjustment circuit includes the PFC circuit and the primary side circuit of the DC-DC circuit. The step of controlling the source adjustment circuit according to the first pulse parameter of the first pulse signal, so that the source adjustment circuit adjusts based on the desired value, includes: The primary circuit is controlled according to the first pulse parameter of the first pulse signal to instruct the control parameters of the primary circuit to be adjusted based on the desired value.

20. The control method according to claim 19, characterized in that, Also includes: Obtain the first output voltage of the PFC circuit; A second pulse signal is transmitted to the second controller, and the second pulse parameter of the second pulse signal is used to describe the first output voltage, so that the second controller generates the first pulse signal according to the output information and the second pulse parameter of the second pulse signal.

21. The control method according to claim 20, characterized in that, The step of controlling the primary-side circuit according to the first pulse parameter of the first pulse signal includes: After receiving the first pulse signal, the second output voltage of the PFC circuit is obtained; The target coefficient is obtained based on the difference between the second output voltage and the first output voltage; Based on the target coefficient, the expected value indicated by the first pulse signal is corrected to obtain the target value of the control parameter; The primary circuit is controlled according to the target value.

22. A controller, characterized in that, The controller includes at least one processor, a memory, and instructions stored in the memory and executable by the at least one processor, wherein the at least one processor executes the instructions to implement the steps of the method according to any one of claims 9-21.

23. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method described in any one of claims 9-21.

24. An electronic device, characterized in that, The electronic device includes the power conversion circuit according to any one of claims 1-8.

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