Current-sharing parallel operation device and method for numerical control switching power supply

Abstract

The invention belongs to the technical field of current-sharing parallel operation of switching power supplies, and provides a current-sharing parallel operation device and method of a numerical control switching power supply, the upper surface of a switching power supply module is connected with a mounting plate, the upper surface of the mounting plate is provided with a digital signal processor, one side of the switching power supply module is connected with a first connecting line in an inserted mode, and the first connecting line is connected with a second connecting line in an inserted mode. The first connecting line is connected with a CAN bus controller, a second connecting line is inserted into the front surface of the switching power supply module, and the second connecting line is connected with a fault detector; a current sharing control algorithm based on wireless communication is adopted, data exchange among the modules is achieved through the wireless modules, transmission delay and interference of a CAN bus are avoided, the response speed and stability of the system are improved, the current sharing control algorithm based on the neural network is adopted, and the reliability of the system is improved. The output characteristics and the load change of each module are adaptively learned through the neural network, so that more accurate and flexible current sharing control is realized, and the complexity and the cost of the system are reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of current-sharing parallel operation of switching power supplies, and in particular to a current-sharing parallel operation device and method for digitally controlled switching power supplies. Background Art

[0002] With the rapid development of power electronics technology and its wide application in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communication equipment, power equipment, instrumentation, medical equipment, semiconductor refrigeration and heating, air purifiers, electronic refrigerators, LCD monitors, LED lamps, communication equipment, audio-visual products, security monitoring, LED light bags, computer cases, digital products and instruments, the demand for high-power and high-reliability power supply systems continues to increase. The traditional single power supply mode has many limitations, such as limited output power and difficulty in meeting the needs of ultra-high power applications. At the same time, the high-power power supply brings difficulties to the selection of power devices, the improvement of switching frequency and power efficiency in design and implementation, which is not conducive to environmental protection and energy saving. In addition, a single power supply cannot provide high reliability. Once the power supply fails, the entire system will collapse.

[0003] When the existing digital control switch power supply current balancing and paralleling is used, such as a digital control switch power supply current balancing and paralleling device and method with publication number CN112994206A, the device includes at least two digital control switch power supplies connected in parallel, the output of the digital control switch power supply is connected to the load, the digital control switch power supply is configured with a voltage comparison unit, the digital control switch power supply is connected to a preset current balancing line through the voltage comparison unit, the positive output end of the digital control switch power supply is connected to a first current sampling unit, which is used to collect the local current value of the digital control switch power supply, and convert the current value into a voltage value and output it to a first operational amplifier; the voltage comparison unit includes the first operational amplifier and a first diode, the positive input end of the first operational amplifier obtains the output voltage of the first current sampling unit, the negative pole of the first operational amplifier obtains the voltage of the current balancing line, and the output end of the first operational amplifier is connected to the current balancing line through the first diode;

[0004] Although the above patent performs current-sharing and parallel control on the CNC switching power supply, not only can the single machine with the largest local current value be used as the host, but also can automatically replace it when a fault occurs in the host, to ensure that the entire machine group can work normally, which greatly improves the stability and reliability of the parallel operation of the CNC switching power supply, the system is highly complex and requires the use of high-performance DSP chips and CAN bus controllers, which increases the cost and power consumption of the system. At the same time, the response speed of the system is limited by the operation speed of the DSP and the transmission speed of the CAN bus, and may not meet the requirements of high dynamic loads. Finally, the stability of the system is affected by the software programming and debugging of the DSP, and there may be software errors or loopholes, resulting in abnormal operation of the system.

[0005] Therefore, those skilled in the art have proposed a current-sharing parallel device and method for digitally controlled switching power supplies to solve the problems raised in the background art. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a current-sharing parallel device and method for a digitally controlled switching power supply, so as to solve the problems in the prior art that the system is highly complex and requires the use of a high-performance DSP chip and a CAN bus controller, which increases the cost and power consumption of the system. At the same time, the response speed of the system is limited by the operation speed of the DSP and the transmission speed of the CAN bus, and may not be able to meet the requirements of high dynamic loads. Finally, the stability of the system is affected by the software programming and debugging of the DSP, and there may be software errors or loopholes, resulting in abnormal operation of the system.

[0007] A current-sharing parallel device for a digitally controlled switching power supply, characterized in that it comprises a plurality of switching power supply modules, a digital signal processor, a CAN bus controller, a fault detector and a protection circuit line, characterized in that each of the plurality of switching power supply modules comprises a switching circuit and an output filtering circuit; the digital signal processor is used to control the duty cycle of the switching circuit of each switching power supply module; the CAN bus controller is used to realize data exchange between each switching power supply module; the fault detector and the protection circuit line are electrically connected to each switching power supply module, a mounting plate is connected to the upper surface of the switching power supply module, a digital signal processor is installed on the upper surface of the mounting plate, a first connecting line is plugged into one side of the switching power supply module, the first connecting line is interconnected with the CAN bus controller, a second connecting line is plugged into the front surface of the switching power supply module, the second connecting line is interconnected with the fault detector.

[0008] Preferably, the current sharing control algorithm inside the digital signal processor is based on wireless communication.

[0009] Preferably, the current sharing control algorithm inside the digital signal processor is based on a neural network.

[0010] Preferably, the current sharing control algorithm inside the digital signal processor is based on fuzzy logic.

[0011] Preferably, data exchange between the plurality of switching power supply modules is based on a time-division communication protocol.

[0012] Preferably, the fault detector and the fault handling strategy within the protection circuit line are based on a state machine.

[0013] Preferably, the switching circuit inside the switching power supply module is based on soft switching.

[0014] Preferably, the current sharing control algorithm inside the digital signal processor is based on artificial intelligence.

[0015] A method for using a current-sharing and paralleling digital control switching power supply, characterized in that it comprises the following steps: S1, a current-sharing control algorithm realizes data exchange between various switching power supply modules through a wireless module, thereby avoiding transmission delay and interference of a CAN bus;

[0016] S2, adaptively learning the output characteristics and load changes of each switching power supply module through a neural network to achieve more accurate and flexible current sharing control;

[0017] S3, the switching power supply module realizes synchronization and coordination of each switching power supply module by setting a clock signal on each switching power supply module, thereby reducing communication conflicts and interference;

[0018] S4, using fuzzy logic to process the uncertainty and fuzziness of the output current and voltage of each switching power module to achieve more stable and robust current sharing control;

[0019] S5, by setting a state machine on the DSP, according to different fault types and levels, execute corresponding fault handling actions, including alarm, isolation, switching, recovery, etc.;

[0020] S6. By using fuzzy logic to process the uncertainty and ambiguity of the output current and voltage of each switching power supply module, a more stable and robust current sharing control is achieved, which improves the fault tolerance and safety of the system; through artificial intelligence technologies such as deep learning, reinforcement learning, genetic algorithms, etc., intelligent optimization and control of the output current of each switching power supply module is achieved.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The current sharing control algorithm based on wireless communication is adopted to realize data exchange between modules through wireless modules, which avoids the transmission delay and interference of CAN bus and improves the response speed and stability of the system.

[0023] 2. A neural network-based current sharing control algorithm is adopted to adaptively learn the output characteristics and load changes of each module through the neural network, so as to achieve more accurate and flexible current sharing control and reduce the complexity and cost of the system.

[0024] 3. A current sharing control algorithm based on fuzzy logic is adopted to process the uncertainty and ambiguity of the output current and voltage of each module through fuzzy logic, so as to achieve more stable and robust current sharing control and improve the fault tolerance and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 2 For the present invention Figure 1 Use the flow chart in

[0027] In the figure: 1. switching power supply module; 2. mounting plate; 3. digital signal processor; 4. first connecting line; 5. CAN bus controller; 6. second connecting line; 7. fault detector; 8. protection circuit line; 9. base. DETAILED DESCRIPTION

[0028] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] As attached Figure 1-2 As shown:

[0030] Embodiment 1: The present invention provides a current-sharing and paralleling device for a digitally controlled switching power supply, comprising a plurality of switching power supply modules 1, a digital signal processor 3, the digital signal processor 3 being a DSP, a CAN bus controller 5, a fault detector 7 and a protection circuit line 8, characterized in that: a plurality of switching power supply modules 1, each switching power supply module 1 comprising a switching circuit and an output filter circuit, data exchange between the plurality of switching power supply modules 1 adopts a communication protocol based on time division, the switching power supply module 1 adopts a switching circuit based on a soft switch, a mounting plate 2 is connected to the upper surface of the switching power supply module 1, a digital signal processor 3 is mounted on the upper surface of the mounting plate 2, a first connecting line 4 is plugged into one side of the switching power supply module 1, the first connecting line 4 is interconnected with the CAN bus controller 5, a second connecting line 6 is plugged into the front surface of the switching power supply module 1, the second connecting line 6 is interconnected with the fault detector 7.

[0031] Specifically, the switching power supply module 1 realizes synchronization and coordination of each switching power supply module 1 by setting a clock signal on each switching power supply module 1, thereby reducing communication conflicts and interferences. The switching power supply module 1 is used to convert input alternating current into output direct current, and the output filter circuit is used to convert input alternating current into output direct current. By adding an auxiliary circuit in the switching circuit, zero voltage or zero current switching of the switching device is realized, thereby reducing switching losses and electromagnetic interference, and improving the efficiency and performance of the switching power supply module 1.

[0032] The digital signal processor 3, which is a DSP, is used to control the duty cycle of the switching circuit of each switching power supply module 1 to adjust the output current of each switching power supply module 1. The digital signal processor 3, which is a DSP, adopts a current sharing control algorithm based on wireless communication. The digital signal processor 3, which is a DSP, adopts a current sharing control algorithm based on neural network. The digital signal processor 3, which is a DSP, adopts a current sharing control algorithm based on artificial intelligence.

[0033] Specifically, the current sharing control algorithm realizes data exchange between each switching power supply module 1 through a wireless module, avoiding transmission delay and interference of the CAN bus, and improving the response speed and stability of the system; adaptively learning the output characteristics and load changes of each switching power supply module 1 through a neural network, achieving more accurate and flexible current sharing control, and reducing the complexity and cost of the system; processing the uncertainty and ambiguity of the output current and voltage of each switching power supply module 1 through fuzzy logic, achieving more stable and robust current sharing control, and improving the fault tolerance and safety of the system; and realizing intelligent optimization and control of the output current of each switching power supply module 1 through artificial intelligence technologies, such as deep learning, reinforcement learning, genetic algorithms, etc., and improving the performance and effect of the current sharing control of the system.

[0034] The fault detector 7 and the protection circuit line 8 are used to monitor the input voltage, output voltage, output current, temperature and other parameters of each switching power supply module 1, as well as the working status of the DSP and the CAN bus controller 5, to realize timely identification and processing of overvoltage, undervoltage, overcurrent, overtemperature and other faults. The fault detector 7 and the protection circuit line 8 adopt a fault processing strategy based on a state machine.

[0035] Specifically, by setting a state machine on the DSP, corresponding fault handling actions are executed according to different fault types and levels, including alarm, isolation, switching, recovery, etc., thereby improving the system's fault handling capability and efficiency.

[0036] A method for using a current-sharing and paralleling digital control switching power supply, characterized in that it comprises the following steps: S1, a current-sharing control algorithm realizes data exchange between each switching power supply module 1 through a wireless module, thereby avoiding transmission delay and interference of a CAN bus;

[0037] S2, adaptively learning the output characteristics and load changes of each switching power supply module 1 through a neural network to achieve more accurate and flexible current sharing control;

[0038] S3, the switching power supply module 1 realizes synchronization and coordination of each switching power supply module 1 by setting a clock signal on each switching power supply module 1, thereby reducing communication conflicts and interference;

[0039] S4, processing the uncertainty and fuzziness of the output current and voltage of each switching power supply module 1 through fuzzy logic to achieve more stable and robust current sharing control;

[0040] S5, by setting a state machine on the DSP, according to different fault types and levels, execute corresponding fault handling actions, including alarm, isolation, switching, recovery, etc.;

[0041] S6. By using fuzzy logic to process the uncertainty and ambiguity of the output current and voltage of each switching power supply module 1, a more stable and robust current sharing control is achieved, thereby improving the fault tolerance and safety of the system; by using artificial intelligence technologies such as deep learning, reinforcement learning, genetic algorithms, etc., intelligent optimization and control of the output current of each switching power supply module 1 is achieved.

[0042] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0043] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradiction.

[0047] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0048] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A current-sharing parallel device for a digitally controlled switching power supply, characterized in that: The invention comprises a plurality of switch power modules (1), a digital signal processor (3), a CAN bus controller (5), a fault detector (7) and a protection circuit line (8), and is characterized in that: each of the plurality of switch power modules (1) comprises a switch circuit and an output filter circuit; the digital signal processor (3) is used to control the duty cycle of the switch circuit of each switch power module (1); the CAN bus controller (5) is used to realize data exchange between each switch power module (1); the fault detector (7) and the protection circuit line (8) are electrically connected to each switch power module (1); the upper surface of the switch power module (1) is connected to a mounting plate (2), the upper surface of the mounting plate (2) is mounted with a digital signal processor (3); a first connecting line (4) is plugged into one side of the switch power module (1), the first connecting line (4) is interconnected with the CAN bus controller (5); a second connecting line (6) is plugged into the front surface of the switch power module (1), the second connecting line (6) is interconnected with the fault detector (7).

2. A current-sharing parallel device for a digitally controlled switching power supply as claimed in claim 1, characterized in that: The current sharing control algorithm inside the digital signal processor (3) is based on wireless communication.

3. A current-sharing parallel device for a digitally controlled switching power supply as claimed in claim 1, characterized in that: The current sharing control algorithm inside the digital signal processor (3) is based on a neural network.

4. A current-sharing parallel device for a digitally controlled switching power supply as claimed in claim 1, characterized in that: The current sharing control algorithm inside the digital signal processor (3) is based on fuzzy logic.

5. A current-sharing parallel device for a digitally controlled switching power supply as claimed in claim 1, characterized in that: The data exchange between the plurality of switching power supply modules (1) is based on a time-division communication protocol.

6. A current-sharing parallel device for a digitally controlled switching power supply as claimed in claim 1, characterized in that: The fault handling strategy within the fault detector (7) and the protection circuit line (8) is based on a state machine.

7. A current-sharing parallel device for a digitally controlled switching power supply as claimed in claim 1, characterized in that: The switch circuit inside the switch power supply module (1) is based on soft switching.

8. A current-sharing parallel device for a digitally controlled switching power supply as claimed in claim 1, characterized in that: The current sharing control algorithm inside the digital signal processor (3) is based on artificial intelligence.

9. A method for current-sharing and paralleling a digital control switching power supply, characterized in that: The following steps are involved: S1, the current sharing control algorithm realizes data exchange between each switching power supply module (1) through the wireless module, avoiding the transmission delay and interference of the CAN bus; S2, adaptively learning the output characteristics and load changes of each switching power supply module (1) through a neural network to achieve more accurate and flexible current sharing control; S3, the switching power supply modules (1) realize synchronization and coordination of the switching power supply modules (1) by setting a clock signal on each switching power supply module (1), thereby reducing communication conflicts and interferences; S4, processing the uncertainty and fuzziness of the output current and voltage of each switching power supply module (1) through fuzzy logic to achieve more stable and robust current sharing control; S5, by setting a state machine on the DSP, according to different fault types and levels, execute corresponding fault handling actions, including alarm, isolation, switching, recovery, etc.; S6. By using fuzzy logic to process the uncertainty and ambiguity of the output current and voltage of each switching power supply module (1), a more stable and robust current sharing control is achieved, thereby improving the fault tolerance and safety of the system; by using artificial intelligence technologies such as deep learning, reinforcement learning, genetic algorithms, etc., intelligent optimization and control of the output current of each switching power supply module (1) is achieved.

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