Power converter control method, apparatus, electrical device, and storage medium

Abstract

The application discloses a power converter control method and device, electrical equipment and a storage medium. The method comprises the following steps: determining three first variables; the three first variables comprise a voltage on the side of a power converter controller, a current on the side of the power converter controller and a voltage on the non-controller side of the power converter; determining a second variable based on the three first variables and at least one component parameter of the power converter; the second variable represents a current on the non-controller side of the power converter and / or a parameter associated with the current on the non-controller side of the power converter; and adjusting at least one control parameter of the power converter when the determined second variable meets a set adjustment condition.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power systems, and particularly relates to a power converter control method and device, electrical equipment and a storage medium. BACKGROUND

[0002] In the fields of photovoltaic, UPS, electric drive, charging pile, communication power supply, aviation power supply and industrial servo, the power converter has a wide range of applications. For circuit control, application requirements, fault protection and other aspects, current sampling and detection are needed on the non-controller side of the power converter. In related technologies, the power converter has the problems of high production and maintenance costs. SUMMARY

[0003] Therefore, the embodiments of the present application provide a power converter control method and device, electrical equipment and a storage medium to at least solve the problem of high production and maintenance costs in related technologies.

[0004] The technical solutions of the embodiments of the present application are implemented as follows:

[0005] The embodiments of the present application provide a power converter control method, which comprises the following steps:

[0006] determining three first variables; the three first variables comprise a voltage on the controller side of the power converter, a current on the controller side of the power converter and a voltage on the non-controller side of the power converter;

[0007] determining a second variable based on the three first variables and at least one component parameter of the power converter; the second variable represents a current on the non-controller side of the power converter and / or a parameter associated with the current on the non-controller side of the power converter;

[0008] adjusting at least one control parameter of the power converter in a case where the determined second variable meets a set adjustment condition.

[0009] In the above scheme, the determination of the second variable based on the three first variables and the at least one component parameter of the power converter comprises the following steps:

[0010] determining an operation mode of the power converter based on the current on the controller side of the power converter;

[0011] determining the second variable according to the operation mode of the power converter based on the three first variables and the at least one component parameter of the power converter.

[0012] In the above scheme, the determination of the second variable based on the three first variables and the at least one component parameter of the power converter comprises the following steps:

[0013] determining a secondary side current ripple based on a product of the first ratio and the first difference; wherein,

[0014] the first ratio represents a ratio of a magnetizing time to an excitation inductance of the power converter; the first difference represents a difference between a first product and a first sum; the first product represents a product of a turns ratio of a primary side and a secondary side of the power converter and a primary side voltage of the power converter; the first sum represents a sum of an output diode voltage drop and a secondary side voltage of the power converter.

[0015] In the above solution, the voltage at the power converter controller side, the current at the power converter controller side and / or the voltage at the power converter non-controller side are obtained by sampling. In the above solution, the at least one component parameter of the power converter includes at least one of:

[0016] the excitation inductance of the power converter;

[0017] the turns ratio of the primary side and the secondary side of the power converter;

[0018] the output diode voltage drop;

[0019] the switching frequency;

[0020] the switching period.

[0021] In the above solution, the adjusting the at least one control parameter of the power converter includes:

[0022] adjusting the duty cycle and / or the switching frequency of the power converter.

[0023] Embodiments of the present application also provide a power converter control device, comprising:

[0024] a first determining unit configured to determine three first variables; the three first variables include a voltage at a power converter controller side, a current at the power converter controller side and a voltage at a power converter non-controller side;

[0025] a second determining unit configured to determine a second variable based on the three first variables and at least one component parameter of the power converter; the second variable represents a current at the power converter non-controller side and / or a parameter associated with the current at the power converter non-controller side;

[0026] an adjusting unit configured to adjust at least one control parameter of the power converter if the determined second variable satisfies a set adjusting condition.

[0027] The embodiment of the present application further provides an electrical device, comprising a processor and a memory for storing a computer program capable of running on the processor,

[0028] The processor is configured to execute the computer program to perform the steps of any of the methods.

[0029] In the above scheme, the electrical device comprises a power supply; and the power supply comprises a power converter.

[0030] The embodiment of the present application further provides a storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the steps of any of the methods.

[0031] In various embodiments of the present application, three first variables are determined; the three first variables comprise a voltage on the power converter controller side, a current on the power converter controller side and a voltage on the power converter non-controller side; a second variable is determined based on the three first variables and at least one component parameter of the power converter; the second variable represents a current on the power converter non-controller side and / or a parameter associated with the current on the power converter non-controller side; and at least one control parameter of the power converter is adjusted in a case where the determined second variable satisfies a set adjustment condition. In the above scheme, the current on the power converter non-controller side and / or the parameter associated with the current on the power converter non-controller side is determined based on the voltage on the power converter controller side, the current on the power converter controller side and the voltage on the power converter non-controller side, and at least one component parameter of the power converter, compared with the scheme of adding components in a circuit in the related art, the above scheme does not need to add components such as current sampling in the circuit, thereby improving the reliability of the power converter, reducing the production and maintenance costs of the power converter. Moreover, the components of the power converter circuit are reduced, the board area of the power converter is reduced, and the failure probability is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 FIG. 1 is a schematic diagram of a flyback power converter circuit in the related art;

[0033] Figure 2 FIG. 2 is a schematic diagram of waveforms in the related art;

[0034] Figure 3 FIG. 3 is a schematic diagram of a forward PWM power converter circuit provided by an embodiment of the present application;

[0035] Figure 4 FIG. 4 is a schematic diagram of a power converter control method implementation process provided by an embodiment of the present application;

[0036] Figure 5 FIG. 5 is a schematic diagram of an inductance current waveform in a CCM mode provided by an embodiment of the present application;

[0037] Figure 6 A DCM mode inductor current waveform diagram provided for an embodiment of the present application;

[0038] Figure 7 A power converter control method implementation flow diagram provided for an application embodiment of the present application

[0039] Figure 8 A functional unit diagram provided for an application embodiment of the present application;

[0040] Figure 9 A current signal transmission diagram provided for an application embodiment of the present application;

[0041] Figure 10 A current signal transmission diagram provided for another application embodiment of the present application;

[0042] Figure 11 A structure diagram of a power converter control device provided for an embodiment of the present application;

[0043] Figure 12 A structure diagram of an electrical device provided for an embodiment of the present application. DETAILED DESCRIPTION

[0044] In the fields of photovoltaic, UPS, electric drive, charging pile, communication power supply, aviation power supply, industrial servo, etc., isolated power converters have wide applications. In order to cope with different application scenarios, the controller can be set on the primary side or the secondary side of the power converter as needed. In the application of the power converter, for the reasons of circuit control, application demand, fault protection, etc., current sampling and detection are needed on the non-controller side of the power converter.

[0045] As Figure 1 shown in the schematic diagram of the flyback power converter circuit, the output voltage of the secondary side of the power converter is extracted by using the auxiliary feedback winding of the auxiliary power converter, and the operating mode of the flyback converter is determined by the output voltage, that is, the current detected on the primary side is taken as the control object to realize constant current output on the secondary side. Specifically, as Figure 2 shown in the waveform diagram corresponding to the flyback power converter circuit, the target value of the output current is compared with the primary side current and the duty cycle information, and the duty cycle signal is generated after the PID module to drive the main switch tube and the auxiliary switch tube of the snubber circuit, thereby realizing constant current control of the secondary side current. Here, sampling resistors, current sensors and other components need to be introduced into the power converter circuit, and the power converter has the problem of high production and maintenance cost.

[0046] Based on this, in various embodiments of the present application, three first variables are determined; the three first variables include a voltage on the power converter controller side, a current on the power converter controller side, and a voltage on the power converter non-controller side; based on the three first variables and at least one component parameter of the power converter, a second variable is determined; the second variable represents a current on the power converter non-controller side and / or a parameter associated with the current on the power converter non-controller side; in the case where the determined second variable meets a set adjustment condition, at least one control parameter of the power converter is adjusted. In the above scheme, according to the voltage on the power converter controller side, the current on the power converter controller side, and the voltage on the power converter non-controller side, based on at least one component parameter of the power converter, the current on the power converter non-controller side and / or the parameter associated with the current on the power converter non-controller side are determined, compared with the scheme of increasing components in the circuit in the related art, the above scheme does not need to increase current sampling and other components in the circuit, thereby improving the reliability of the power converter, reducing the production and maintenance cost of the power converter. Moreover, the components of the power converter circuit are reduced, the board area of the power converter is reduced, and the failure probability is reduced.

[0047] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0048] The following is described taking a forward PWM type power converter shown in the drawings as an example. It should be understood that for flyback PWM type power converters, full-bridge power converters, half-bridge power converters and other types of power converters, the same or similar power converter control method can be used to achieve the same or similar power converter control method, which will not be described here. Figure 3

[0049] Figure 4 The implementation flowchart of the power converter control method provided by the embodiments of the present application, the embodiments of the present application provide a power converter control method, which comprises:

[0050] Step 401: determining three first variables.

[0051] The three first variables include a voltage on the power converter controller side, a current on the power converter controller side, and a voltage on the power converter non-controller side.

[0052] The power converter can be an isolated power converter.

[0053] ​The three first variables include the voltage on the controller side of the power converter, which can be determined based on the sampled voltage on the controller side of the power converter or real-time detection parameters capable of representing the voltage on the controller side. The three first variables include the current on the controller side of the power converter, which can be determined based on the sampled current on the controller side of the power converter or real-time detection parameters capable of representing the current on the controller side. The three first variables also include the voltage on the non-controller side of the power converter, which can be determined based on the sampled voltage on the non-controller side of the power converter or real-time detection parameters capable of representing the voltage on the non-controller side.

[0054] According to the circuit configuration of the power converter, in some embodiments, the voltage on the controller side of the power converter, the current on the controller side of the power converter and / or the voltage on the non-controller side of the power converter are obtained by sampling.

[0055] Here, some or all of the three first variables can be obtained by sampling circuits or other sampling methods, that is, at least one of the first variables can be obtained by sampling. Preferably, in the circuit configuration of the power converter, when at least one of the first variables is not provided with a corresponding sampling circuit, it can be calculated based on other sampling results. For example, in the case where the voltage on the non-controller side is not sampled, the voltage on the non-controller side can be determined by calculation.

[0056] The sampling results of at least one of the first variables are input into the controller.

[0057] Step 402: determining a second variable based on the three first variables and at least one component parameter of the power converter.

[0058] The second variable represents the current on the non-controller side of the power converter and / or at least one parameter associated with the current on the non-controller side of the power converter.

[0059] Based on the determined three first variables and at least one component parameter of the power converter, at least one parameter associated with the current on the non-controller side of the power converter and / or the current on the non-controller side of the power converter is determined. The at least one parameter associated with the current on the non-controller side of the power converter, that is, the current on the non-controller side of the power converter and / or the parameter associated with the current on the non-controller side of the power converter, can be the peak-to-peak value, average value, maximum value, minimum value, effective value of the current, or the peak-to-peak value, average value, maximum value, minimum value, effective value of the power, etc. Here, including but not limited to: secondary side current ripple, minimum current corresponding to the secondary side, peak current corresponding to the secondary side, minimum current corresponding to the primary side, maximum current corresponding to the primary side, average current corresponding to the primary side.

[0060] It should be noted that in the embodiments of the present application, based on the three first variables and the at least one component parameter of the power converter, one or more of the following parameters can also be determined: the inductance of the non-controller side of the power converter, the magnetization time, the magnetization current, the secondary side current off time, and the secondary side zero current time.

[0061] In some embodiments, the at least one component parameter of the power converter includes at least one of:

[0062] The magnetizing inductance of the power converter;

[0063] The turns ratio of the primary side and the secondary side of the power converter;

[0064] The output diode voltage drop;

[0065] The switching frequency;

[0066] The switching period.

[0067] Here, the magnetizing inductance of the power converter is the inductance of the primary side of the power converter. The magnetizing inductance can be determined according to the controller side inductance of the power converter. When the controller is arranged on the primary side of the power converter, the controller side inductance of the power converter is the magnetizing inductance. When the controller is arranged on the secondary side of the power converter, the magnetizing inductance can be determined by the ratio of the controller side inductance of the power converter to the square of the turns ratio of the primary side and the secondary side of the power converter.

[0068] Step 403: If the determined second variable meets the set adjustment condition, adjust at least one control parameter of the power converter.

[0069] According to the actual application needs of the power converter, set a corresponding adjustment condition for each of the at least one second variable. If the determined second variable meets the set adjustment condition, adjust at least one control parameter of the power converter.

[0070] In some embodiments, the adjustment of the at least one control parameter of the power converter includes:

[0071] Adjusting the duty cycle and / or the switching frequency of the controller of the power converter.

[0072] Here, the precise control of the current of the non-controller side and the parameters associated with the current of the non-controller side can be achieved by adjusting the duty cycle and / or the switching power of the controller of the power converter.

[0073] Thus, by adjusting at least one control parameter of the power converter, the current parameters of the power converter can be controlled, including but not limited to constant current, overcurrent, ripple, frequency, constant power, peak power, peak current. And after adjusting at least one control parameter of the power converter, at least one first variable can be re-determined, and the corresponding second variable can be re-determined, to achieve real-time control of the current parameters of the power converter.

[0074] In some embodiments, the power converter control method is applied to an electrical device.

[0075] Preferably, the power converter control method is applied to a power supply, and the power supply includes the power converter.

[0076] Preferably, the calculation and adjustment can be performed by a controller of the power converter.

[0077] In various embodiments of the present application, based on at least one component parameter of the power converter, the current on the non-controller side of the power converter and / or a parameter associated with the current on the non-controller side of the power converter are determined according to the voltage on the controller side of the power converter, the current on the controller side of the power converter, and the voltage on the non-controller side of the power converter, compared with the related art scheme of increasing components in the circuit, the above scheme does not need to increase current sampling components in the circuit, thereby improving the reliability of the power converter, reducing the production and maintenance cost of the power converter. And, the components of the power converter circuit are reduced, the board area of the power converter is reduced, and the failure probability is reduced.

[0078] In some embodiments, the determination of the second variable based on the three first variables and at least one component parameter of the power converter includes:

[0079] determining the secondary side current ripple based on the product of the first ratio and the first difference; wherein,

[0080] The first ratio represents the ratio of the magnetization time to the excitation inductance of the power converter; the first difference represents the difference between the first product and the first sum; the first product represents the product of the turns ratio of the primary side and the secondary side of the power converter and the primary side voltage of the power converter; and the first sum represents the sum of the output diode voltage drop and the secondary side voltage of the power converter.

[0081] Here, the secondary side current ripple I ripple The formula (1) can be obtained as follows:

[0082]

[0083] wherein,

[0084] L pLm represents the magnetizing inductance of the power converter, i.e. the primary side inductance of the power converter; t1 represents the magnetization time; V in V represents the primary side voltage of the power converter; V out V represents the secondary side voltage of the power converter; V f n represents the output diode voltage drop; n p Np represents the primary side number of turns of the power converter; n s Ns represents the secondary side number of turns of the power converter.

[0085] Here, the controller side inductance is a set value. When the controller is set at the primary side of the power converter, the controller side inductance is the magnetizing inductance Lm of the power converter. p When the controller is set at the secondary side of the power converter, the magnetizing inductance Lm of the power converter is p It can be obtained by formula (2):

[0086]

[0087] wherein,

[0088] L s Ls represents the secondary side inductance of the power converter.

[0089] After determining the secondary side current ripple I ripple The minimum current I sec,min It can be obtained by formula (3):

[0090]

[0091] wherein,

[0092] I out Iout represents the output current average value, which can be calculated at least according to the controller side current, without limitation.

[0093] The peak current I sec,max It can be obtained by formula (4):

[0094]

[0095] The minimum current I pri,min It can be obtained by formula (5):

[0096]

[0097] The maximum current I pri,max It can be obtained by formula (6):

[0098]

[0099] wherein the magnetizing current I mag may be obtained by equation (7):

[0100]

[0101] the average current I in,avg may be obtained by equation (8):

[0102]

[0103] In some embodiments, the determining the second variable based on the three first variables and at least one component parameter of the power converter comprises:

[0104] determining the operation mode of the power converter based on the current at the controller side of the power converter;

[0105] determining the second variable according to the operation mode of the power converter based on the three first variables and at least one component parameter of the power converter.

[0106] Here, the operation mode of the power converter includes a continuous conduction mode (CCM) and a discontinuous conduction mode (DCM). As Figure 5 the minimum value of the corresponding inductor current in the charging and discharging period is greater than 0, it is determined that the power converter is currently operating in the CCM mode. As Figure 6 the minimum value of the corresponding inductor current in the charging and discharging period is equal to 0, it is determined that the power converter is currently operating in the DCM mode.

[0107] As mentioned above, one or more of the following parameters can be determined: magnetizing time, magnetizing current, secondary side current off time, secondary side zero current time.

[0108] wherein the magnetizing current I mag may be obtained by equation (7).

[0109] When the power converter is operating in the CCM mode, the magnetizing time t1 corresponding to the operation mode of the power converter can be determined.

[0110] The magnetizing time t1 can be obtained by equation (9):

[0111]

[0112] wherein,

[0113] f switch is a characteristic of the switching frequency.

[0114] When the power converter operates in the DCM mode, the running mode of the power converter can be determined corresponding to the magnetization time t1, the secondary side current off time t2, and the secondary side zero current time t3.

[0115] The magnetization time t1 can be obtained by formula (10):

[0116]

[0117] The secondary side current off time t2 can be obtained by formula (11):

[0118]

[0119] The secondary side zero current time t3 can be obtained by formula (12):

[0120]

[0121] Here, the input condition can be the inductance of the controller side of the power converter, the switching frequency or the switching period, the real-time detection value of the control side voltage or other real-time detection values related to the physical quantity, the turns ratio of the primary side and the secondary side of the power converter, the real-time detection value of the non-control side voltage or other real-time detection values related to the physical quantity, the real-time current detection value of the controller side or other real-time detection values related to the physical quantity. The output condition can be a parameter related to the current of the non-control side.

[0122] According to formula (1) to formula (12), only the current waveform of the controller side in each switching period is known, the current waveform of the non-controller side can be determined, and the current-related parameter and the physical quantity can be obtained.

[0123] It should be noted that formula (1) to formula (12) are the relationships of the forward PWM type power converter, and for other types of power converters such as flyback PWM type power converter, full-bridge power converter, half-bridge power converter, etc. can be correspondingly set, which will not be repeated here.

[0124] The application will be further described in detail in combination with the application examples.

[0125] At present, in order to achieve the corresponding control purpose, for example, current protection, constant current control, constant power control, current display, the current is sampled by using a sampling resistor and a current sensor on the non-controller side of the power converter, and the current is transmitted to the controller side of the power converter by using an isolator, and the current is processed by the controller.

[0126] Based on this,Figure 7 A flowchart of a power converter control method provided by the application is shown. The controller detects the controller-side voltage, the controller-side current, and the non-controller-side voltage. According to known parameters of the power converter design, such as inductance, turns ratio, and filter parameters such as output diode voltage drop, the running mode of the current power converter is determined. According to different running modes (CCM and DCM), theoretical calculations are performed, the current waveform is analyzed, and the actual parameters of the non-controller-side (i.e., the isolated side of the power converter) current are extracted and derived. Then, according to the actual parameters of the current obtained, the duty cycle and / or switching frequency of the controller are adjusted to achieve precise control of the current and related parameters of the non-controller-side.

[0127] Here, the specific theoretical calculation relationship is shown in equations (1) to (12).

[0128] For Figure 3 The forward PWM power converter shown can be divided into four functional units according to the functions achieved, as shown in Figure 8 The signal detection unit is used to detect the controller-side voltage, the controller-side current, and the non-controller-side voltage. The parameter unit is used to determine the known parameters of the power converter design, including inductance, secondary inductance, and turns ratio of the primary and secondary sides. The calculation unit is used for running mode analysis and current analysis calculation. The control unit is used to adjust the duty cycle and / or switching frequency.

[0129] The application embodiment accurately calculates, extracts, and infers the inferred isolated-side current (i.e., the non-controller-side current) and related physical quantities such as peak-to-peak value, average value, maximum value, minimum value, and effective value of power, etc. by sampling and detecting information (controller-side current, controller-side voltage), according to the relationship between the known parameters of the control system power converter design and the currents on both sides of the isolated power converter. Not only for low-voltage side current, but also for all non-controller-side current detection. The application embodiment provides an accurate detection and control method for non-isolated-side current-related parameters with low cost and high reliability.

[0130] The beneficial effects of the application embodiment include but are not limited to:

[0131] 1) Without using isolator devices, current sampling devices, and signal modulation devices, precise control of output current and related physical quantities is achieved, reducing the number of power converter devices, reducing the space, and improving long-term reliability.

[0132] 2) Using control-side computing resources, more current information can be obtained. Compared with traditional modulated signals, more signal parameters are obtained, with higher degrees of freedom, which can more truly reflect power converter running information and achieve control targets.

[0133] The application embodiment can realize the detection and control method of the current on the non-controller side of the forward converter, without using sampling resistors, current sensors, signal modulation, isolation transmission and other components, to realize accurate monitoring of the current on the non-controller side and current-related parameter control in the case of reducing design cost. Here, the current-related parameters include but are not limited to constant current, overcurrent, ripple, frequency, constant power, peak power, peak current and other indicators.

[0134] In an application embodiment, as shown in the current signal transmission schematic diagram, the current on the non-controller side is processed to obtain the required parameter information, and then sent to the control unit. Figure 9

[0135] In an application embodiment, as shown in the current signal transmission schematic diagram, the current on the non-controller side is processed to obtain the required parameter information, and then sent to the control unit. Figure 10

[0136] In an application embodiment, the voltage and current on the primary side can also be used to calculate the power, and then the secondary side current can be calculated in real time according to the relationship between the efficiency and the output voltage.

[0137] To realize the method of the application embodiment, the application embodiment further provides a power converter control device, as shown in the current signal transmission schematic diagram, the device comprises: Figure 11

[0138] The first determination unit 1101 is configured to determine three first variables, and the three first variables include the voltage on the controller side of the power converter, the current on the controller side of the power converter, and the voltage on the non-controller side of the power converter.

[0139] The second determination unit 1102 is configured to determine a second variable based on the three first variables and at least one component parameter of the power converter, and the second variable represents the current on the non-controller side of the power converter and / or a parameter associated with the current on the non-controller side of the power converter.

[0140] The adjustment unit 1103 is configured to adjust at least one control parameter of the power converter when the determined second variable meets a set adjustment condition.

[0141] In one embodiment, the second determination unit 1102 is configured to:

[0142] determine the operating mode of the power converter based on the current on the controller side of the power converter.

[0143] ​​​determining a second variable according to an operation mode of the power converter based on the three first variables and at least one component parameter of the power converter.

[0144] In one embodiment, the second determining unit 1102 is configured to:

[0145] determining a secondary side current ripple based on a product of a first ratio and a first difference; wherein,

[0146] the first ratio represents a ratio of a magnetizing time to an excitation inductance of the power converter; the first difference represents a difference between a first product and a first sum; the first product represents a product of a turns ratio of a primary side and a secondary side of the power converter and a primary side voltage of the power converter; and the first sum represents a sum of an output diode voltage drop and a secondary side voltage of the power converter.

[0147] In one embodiment, the voltage at the power converter controller side, the current at the power converter controller side and / or the voltage at the power converter non-controller side are obtained by sampling.

[0148] In one embodiment, the at least one component parameter of the power converter comprises at least one of:

[0149] the excitation inductance of the power converter;

[0150] the turns ratio of the primary side and the secondary side of the power converter;

[0151] the output diode voltage drop;

[0152] the switching frequency;

[0153] the switching period.

[0154] In one embodiment, the adjusting unit 1103 is configured to:

[0155] adjusting a duty cycle and / or a switching frequency of the power converter.

[0156] In actual application, the first determining unit 1101, the second determining unit 1102 and the adjusting unit 1103 can be implemented by a processor in a power converter control device, such as a central processing unit (CPU), a digital signal processor (DSP), a microcontroller unit (MCU) or a field-programmable gate array (FPGA).

[0157] It should be noted that the power converter control device provided in the above embodiment is only used for example to illustrate the division of the above program modules when the power converter control device is used to control the power converter. In actual application, the above processing can be completed by different program modules according to the needs, that is, the internal structure of the device is divided into different program modules to complete all or part of the above processing. In addition, the power converter control device and the power converter control method provided in the above embodiment belong to the same concept, and the specific implementation process is described in the method embodiment, which will not be repeated here.

[0158] Based on the hardware implementation of the above program modules, and in order to realize the power converter control method of the embodiment of the present application, the embodiment of the present application further provides an electrical equipment. Figure 12 The hardware component structure diagram of the electrical equipment of the embodiment of the present application is shown in FIG. 1. Figure 12 As shown in FIG. 1, the electrical equipment includes:

[0159] The communication interface 1 can interact with other devices such as network devices and the like.

[0160] The processor 2 is connected with the communication interface 1 to realize information interaction with other devices, and is used to run the computer program to execute the method provided in one or more technical solutions. The computer program is stored on the memory 3.

[0161] Of course, in actual application, each component in the electrical equipment is coupled together through the bus system 4. It can be understood that the bus system 4 is used to realize the connection and communication between the components. The bus system 4 includes not only the data bus, but also the power bus, the control bus and the state signal bus. However, in order to clearly illustrate, all kinds of buses are marked as the bus system 4 in the Figure 12 .

[0162] The memory 3 in the embodiment of the present application is used to store various types of data to support the operation of the electrical equipment. Examples of these data include: any computer program used for operation on the electrical equipment.

[0163] It can be understood that the memory 3 can be a volatile memory or a non-volatile memory, and can also include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a ferromagnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM). The magnetic surface memory can be a disk memory or a tape memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example but not limitation, many forms of RAM can be used, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), sync link dynamic random access memory (SLDRAM), and direct rambus random access memory (DRRAM).The memory 2 described in the embodiments of the present application is intended to include, but not limited to, these and any other suitable type of memory.

[0164] The method disclosed in the embodiments of the present application can be applied in or implemented by the processor 2. The processor 2 can be an integrated circuit chip having a processing capability of signals. In the implementation process, each step of the above method can be completed by integrated logic circuits or instructions in software form of the processor 2. The processor 2 described above can be a general processor, a DSP, or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The processor 2 can implement or execute each method, step and logic block disclosed in the embodiments of the present application. The general processor can be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiments of the present application, the execution can be directly completed by a hardware decoding processor, or completed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in the memory 3. The processor 2 reads the program in the memory 3 and combines the hardware to complete the steps of the above method.

[0165] The processor 2 implements the corresponding flow in each method of the embodiments of the present application when executing the program. For brevity, it will not be repeated here.

[0166] In one embodiment, the electrical device includes a power supply; the power supply includes a power converter.

[0167] In the exemplary embodiments, the embodiments of the present application also provide a storage medium, i.e. a computer storage medium, specifically a computer readable storage medium, such as the memory 3 storing a computer program, which can be executed by the processor 2 to complete the steps of the above method. The computer readable storage medium can be FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disc, or CD-ROM, etc.

[0168] In several embodiments provided in the present application, it should be understood that the disclosed devices, electrical devices and methods can be implemented by other ways. The device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and there can be another division way in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored, or not executed. In addition, the coupling or direct coupling or communication connection between the various components shown or discussed can be through some interface, indirect coupling or communication connection between devices or units, which can be electrical, mechanical or other forms.

[0169] The units described as separate components above can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place or distributed on multiple network units; part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0170] In addition, the functional units in each embodiment of the present application can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be realized in the form of hardware or in the form of hardware plus software functional units.

[0171] Those skilled in the art can understand that all or part of the steps of the above-mentioned method embodiments can be completed by program instruction related hardware, and the above-mentioned program can be stored in a computer readable storage medium, and the program executes the steps including the above-mentioned method embodiments when executed; and the above-mentioned storage medium includes mobile storage devices, ROM, RAM, magnetic discs or optical discs and various storage program codes.

[0172] Alternatively, the integrated units of the present application, if implemented in the form of software functional modules and sold or used as independent products, can also be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application can be embodied in the form of software products, which are stored in a storage medium and include a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in the embodiments of the present application. The above-mentioned storage medium includes mobile storage devices, ROM, RAM, magnetic discs or optical discs and various storage program codes.

[0173] It should be noted that the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict. Unless otherwise stated and limited, the term "connection" should be understood broadly, for example, it can be an electrical connection, or a communication between two elements, it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above-mentioned term can be understood according to the specific situation.

[0174] In addition, in the present application, "first", "second", etc. are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the objects distinguished by "first", "second" and "third" can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0175] The term "and / or", merely describes association relationship of associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the term "at least one" herein means any one of a plurality or any combination of at least two of a plurality, for example, at least one of A, B and C can mean any one or more elements selected from the set consisting of A, B and C.

[0176] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0177] In the specific embodiments, various specific technical features in each of the various embodiments described can be combined in various combinations, for example, different embodiments can be formed by combining different specific technical features. In order to avoid unnecessary repetition, various possible combinations of each specific technical feature in the present application are not described again.

Claims

1. A power converter control method, characterized by, The method comprises: determining three first variables; the three first variables comprise a voltage on a power converter controller side, a current on the power converter controller side, and a voltage on a power converter non-controller side; determining a second variable based at least on the voltage on the power converter controller side and the voltage on the power converter non-controller side among the three first variables, and at least one component parameter of the power converter; the second variable represents a current on the power converter non-controller side and / or a parameter associated with the current on the power converter non-controller side; the second variable is not directly sampled by a component of the power converter; adjusting at least one control parameter of the power converter in a case where the determined second variable satisfies a set adjustment condition; wherein the determining of the second variable based at least on the voltage on the power converter controller side and the voltage on the power converter non-controller side among the three first variables, and at least one component parameter of the power converter comprises: determining a secondary side current ripple based on a product of a first ratio and a first difference value; wherein, the first ratio represents a ratio of a magnetizing time to an excitation inductance of the power converter; the first difference value represents a difference between a first product and a first sum value; the first product represents a product of a turns ratio of a primary side and a secondary side of the power converter and a primary side voltage of the power converter; and the first sum value represents a sum of an output diode voltage drop and a secondary side voltage of the power converter.

2. The method of claim 1, wherein, the determining of the second variable based at least on the voltage on the power converter controller side and the voltage on the power converter non-controller side among the three first variables, and at least one component parameter of the power converter comprises: determining an operation mode of the power converter based on the current on the power converter controller side; determining the second variable according to the operation mode of the power converter based on the three first variables and the at least one component parameter of the power converter.

3. The method of claim 1, wherein, The voltage on the power converter controller side, the current on the power converter controller side, and / or the voltage on the power converter non-controller side are obtained by sampling.

4. The method of claim 1, wherein, The at least one component parameter of the power converter comprises at least one of: the excitation inductance of the power converter; the turns ratio of the primary side and the secondary side of the power converter; the output diode voltage drop; the switching frequency; the switching period.

5. The method of claim 1, wherein, The adjusting of the at least one control parameter of the power converter comprises: adjusting a duty cycle and / or a switching frequency of the power converter.

6. A power converter control device, characterized by, comprise: a first determining unit configured to determine three first variables; the three first variables comprise a voltage on a power converter controller side, a current on the power converter controller side, and a voltage on a power converter non-controller side; The second determining unit is configured to determine a second variable based on at least the voltage on the power converter controller side and the voltage on the power converter non-controller side and at least one component parameter of the power converter, the second variable representing a current on the power converter non-controller side and / or a parameter associated with the current on the power converter non-controller side, the second variable not being directly sampled by a component of the power converter; and the second determining unit is specifically configured to determine a secondary side current ripple based on a product of a first ratio and a first difference, the first ratio representing a ratio of a magnetization time to an excitation inductance of the power converter, the first difference representing a difference between a first product and a first sum, the first product representing a product of a turns ratio of a primary side and a secondary side of the power converter and a primary side voltage of the power converter, and the first sum representing a sum of an output diode voltage drop and a secondary side voltage of the power converter. The adjusting unit is configured to adjust at least one control parameter of the power converter when the determined second variable satisfies a set adjusting condition.

7. An electrical device, characterized by The electrical device comprises a power supply; the power supply comprises the power converter. The computer program is executed by the processor to implement the steps of the method according to any one of claims 1 to 5. The electrical device comprises a power supply; the power supply comprises the power converter.

8. The electrical device of claim 7, wherein, The computer program is executed by the processor to implement the steps of the method according to any one of claims 1 to 5.

9. A storage medium having stored thereon a computer program, characterized in that ​

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