Multi-channel adjustable power device driving power supply and method

Abstract

The invention provides a multi-channel adjustable power device driving power supply, and the power device driving power supply comprises a control panel which comprises a control module and a first connection interface which are connected with each other; the power board comprises a second connecting interface, a power output interface and at least one power sub-board, the second connecting interface is connected with the first connecting interface, the control end of the power sub-board is connected with the second connecting interface, and the output end of the power sub-board is connected with the power output interface; the power daughter board is used for adjusting and outputting voltage based on the control module. The multi-channel independent adjustment capability of the power device driving power supply is realized, and the arrangement of the control panel enables a user to realize remote automatic control of the power device driving power supply by remotely controlling the control panel, so that application and management of the power device driving power supply in a complex test environment are facilitated, and the test efficiency is improved. And the practicability of the power device driving power supply is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of driving power supplies, and in particular, to a multi-channel adjustable driving power supply and method for power devices. Background Art

[0002] Existing driving power supplies for power devices have several problems: First, they lack the ability of multi-channel independent adjustment; second, the adjustment accuracy of the output voltage is relatively low, affecting the dynamic testing of power devices; third, they rely on manual settings and lack remote automation control capabilities, which is not conducive to applications and management in complex testing environments. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a multi-channel adjustable driving power supply and method for power devices to solve all or part of the technical problems involved in the background art.

[0004] Based on the above purpose, the present invention provides a multi-channel adjustable driving power supply for power devices, including:

[0005] A control board, including a control module and a first connection interface connected to each other;

[0006] A power board, including a second connection interface, a power output interface, and at least one power sub-board. The second connection interface is connected to the first connection interface. The control end of the power sub-board is connected to the second connection interface, and the output end of the power sub-board is connected to the power output interface;

[0007] The power sub-board is used to adjust and output voltage based on the control module.

[0008] Further, the power sub-board includes at least one voltage adjustment channel. The control end of the voltage adjustment channel is connected to the second connection interface, and the output end of the voltage adjustment channel is connected to the power output interface.

[0009] Further, the voltage adjustment channel includes a voltage adjustment circuit and a voltage feedback circuit. The control end of the voltage adjustment circuit and the output end of the voltage feedback circuit are both connected to the second connection interface, and the input end of the voltage feedback circuit is connected to the output end of the voltage adjustment circuit.

[0010] Further, the power board further includes a data transmission bus. One end of the data transmission bus is connected to the second connection interface, and the other end is connected to the power sub-board.

[0011] Further, the power board further includes a digital quantity conversion module and a digital quantity input / output interface connected to each other. The digital quantity conversion module is connected to the data transmission bus.

[0012] Further, the control board further includes a first power interface, and the first power interface is connected to the control module to supply power to the control module through the first power interface.

[0013] Further, the power board further includes a second power interface, and the second power interface is connected to the input end of the power sub-board.

[0014] Further, the control board further includes a communication interface, and the communication interface is connected to the control module to send control instructions to the control module through the communication interface.

[0015] Further, the power board further includes a power output bus, one end of the power output bus is connected to the output end of the power sub-board, and the other end is connected to the power output interface.

[0016] Further, the voltage regulation circuit includes a flyback topology circuit.

[0017] Further, the voltage feedback circuit includes a linear optocoupler feedback circuit.

[0018] Based on the same inventive concept, the present application further provides a method applied to the multi-channel adjustable power device driving power supply as described above. The method includes:

[0019] The control module sends a control signal to the power sub-board through the first connection interface and the second connection interface;

[0020] The power sub-board determines the output voltage based on the control signal and outputs it through the power output interface.

[0021] Further, the power sub-board determines the output voltage based on the control signal and outputs it through the power output interface, including:

[0022] The voltage regulation channel of the power sub-board determines the output voltage based on the control signal and outputs it through the power output interface.

[0023] Further, the method further includes:

[0024] The voltage regulation circuit of the voltage regulation channel determines the output voltage based on the control signal and outputs it through the power output interface;

[0025] The voltage feedback circuit of the voltage regulation channel converts the output voltage of the voltage regulation circuit into a feedback signal and sends it to the control module;

[0026] The control module obtains an adjusted control signal based on the feedback signal and the control signal, and sends it to the voltage regulation circuit.

[0027] As can be seen from the above description, a multi-channel adjustable power device driving power supply provided by the present invention is provided with a control board and a power board connected to each other. At least one power sub-board is provided on the power board, so that the control module of the control board can control the power sub-board of the power board. The power sub-board outputs a voltage adapted to the electrical signal based on the electrical signal of the control module, thereby realizing the adjustability of the output voltage of the power sub-board, that is, the output voltage of the power device driving power supply is adjustable, and multiple power sub-boards can be provided on the power board to further improve the diversity of the output voltage of the power device driving power supply; the present application realizes the multi-channel independent adjustment ability of the power device driving power supply, and the setting of the control board enables users to remotely control the control board, realizing the remote automatic control of the power device driving power supply, which is beneficial to the application and management of the power device driving power supply in a complex test environment, and thus improves the practicability of the power device driving power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic structural diagram of a multi-channel adjustable power device driving power supply according to an embodiment of the present invention;

[0030] Figure 2 It is a schematic structural diagram of a power sub-board according to an embodiment of the present invention.

[0031] In the figure: 100, control board; 110, control module; 120, first connection interface; 130, first power supply interface; 140, communication interface; 200, power board; 210, second connection interface; 220, power output interface; 230, power sub-board; 231, voltage adjustment channel; 231-1, voltage adjustment circuit; 231-2, voltage feedback circuit; 240, data transmission bus; 250, digital quantity conversion module; 260, digital quantity input / output interface; 270, power output bus; 280, second power supply interface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following will further describe the present invention in detail with reference to specific embodiments and the accompanying drawings.

[0033] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which this application belongs. The "first", "second" and similar terms used in this application do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0034] In the field of power electronics, the dynamic characteristic test of power devices (such as IGBTs, MOSFETs, etc.) is an important link to evaluate their performance. In particular, the precise control of the gate drive voltage has a decisive impact on the test results. Currently, the commonly used gate drive DC / DC power supply systems on the market mainly use fixed output voltages or a few fixed voltage channels to provide drive voltages for power devices.

[0035] The dynamic characteristic test of power devices refers to the process of measuring and evaluating the electrical characteristics and response performance of power devices (such as power switching devices, IGBTs, MOSFETs, diodes, etc.) during the on, off, and other dynamic change processes under specific working conditions. These dynamic parameters reflect the working ability of power devices in high-frequency and high-speed switching environments, including switching speed, switching loss, conduction time, turn-off time, drive current, voltage and current changes during the transient process, etc.

[0036] However, the existing power device drive power supplies have several problems: First, they lack the ability of multi-channel independent regulation. Especially in applications that require multiple output voltage values, they cannot meet the precise requirements of different power device gate drives. Second, the output voltage regulation accuracy of the existing power supply systems is relatively low, resulting in unstable gate voltages during the test and affecting the accuracy of the dynamic test results. Finally, the regulation of the power supply output voltage usually relies on manual settings and lacks remote automation control capabilities, which is not conducive to applications and management in complex test environments.

[0037] Based on this, this application proposes a multi-channel adjustable power device drive power supply and method, which realizes the regulation accuracy and remote automation control capabilities of the power device drive power supply on the basis of achieving multi-channels.

[0038] The following will detail this application through one or more specific embodiments.

[0039] In some embodiments, a multi-channel adjustable power device driving power supply, as Figure 1 shown, includes:

[0040] A control board 100, including a connected control module 110 and a first connection interface 120;

[0041] A power board 200, including a second connection interface 210, a power output interface 220, and at least one power sub-board 230. The second connection interface 210 is connected to the first connection interface 120. The control end of the power sub-board 230 is connected to the second connection interface 210, and the output end of the power sub-board 230 is connected to the power output interface 220;

[0042] The power sub-board 230 is configured to adjust and output a voltage based on the control module 110.

[0043] Specifically, the control board 100 and the power board 200 are connected through the first connection interface 120 and the second connection interface 210, so that the control module 110 on the control board 100 is connected to the control end of the power sub-board 230 on the power board 200, realizing that the control module 110 controls the output voltage of the power sub-board 230. The power output interface 220 on the power board 200 is connected to the output end of the power sub-board 230, so that the power output interface 220 outputs the output voltage of the power sub-board 230, thereby realizing the application of the power sub-board 230.

[0044] It should be noted that the control module 110 sends a PWM signal to the power sub-board 230 through the first connection interface 120 and the second connection interface 210, and the power sub-board 230 adjusts the output voltage based on the received PWM signal.

[0045] In this embodiment, by providing a connected control board 100 and power board 200, with at least one power sub-board 230 provided on the power board 200, the control module 110 of the control board 100 can control the power sub-board 230 of the power board 200. The power sub-board 230 outputs a voltage adapted to the electrical signal based on the electrical signal of the control module 110, thereby realizing the adjustability of the output voltage of the power sub-board 230, that is, the output voltage of the power device drive power supply is adjustable. Moreover, multiple power sub-boards 230 can be provided on the power board 200 to further enhance the diversity of the output voltage of the power device drive power supply. This application realizes the multi-channel independent adjustment ability of the power device drive power supply. The setting of the control board 100 enables the user to remotely control the control board 100 to achieve remote automatic control of the power device drive power supply, which is beneficial to the application and management of the power device drive power supply in complex test environments, thereby enhancing the practicality of the power device drive power supply.

[0046] In some embodiments, as Figure 2 shown, the power sub-board 230 includes at least one voltage adjustment channel 231. The control end of the voltage adjustment channel 231 is connected to the second connection interface 210, and the output end of the voltage adjustment channel 231 is connected to the power supply output interface 220.

[0047] Specifically, at least one of the voltage adjustment channels 231 is provided on the power sub-board 230. The voltage adjustment channel 231 is used to output the adjusted voltage. The setting of the voltage adjustment channel 231 further increases the voltage output channels of the power device drive power supply on the basis of providing multiple power sub-boards 230, realizing the multi-channel adjustability of the power device drive power supply.

[0048] It should be noted that when two voltage adjustment channels 231 are provided on the power sub-board 230, the output ends of the two voltage adjustment channels 231 can be connected in series to form positive and negative voltages to supply power to the drive circuit of the power device, so as to increase the usage functions of the power device drive power supply.

[0049] In this embodiment, by providing at least one voltage adjustment channel 231 on the power sub-board 230, the power sub-board 230 can output at least one adjusted voltage simultaneously, increasing the voltage output channels of the power device drive power supply without adding the power sub-board 230, which is beneficial to the integrated setting of the power device drive power supply.

[0050] In some embodiments, as Figure 2As shown, the voltage regulation channel 231 includes a voltage regulation circuit 231-1 and a voltage feedback circuit 231-2. The control end of the voltage regulation circuit 231-1 and the output end of the voltage feedback circuit 231-2 are both connected to the second connection interface 210, and the input end of the voltage feedback circuit 231-2 is connected to the output end of the voltage regulation circuit 231-1.

[0051] Specifically, each voltage regulation channel 231 includes a voltage regulation circuit 231-1 and a voltage feedback circuit 231-2. The voltage regulation circuit 231-1 is used to regulate the voltage based on the control signal of the control module 110 and output the regulated voltage. The voltage feedback circuit 231-2 is used to feedback the voltage output by the voltage regulation circuit 231-1 to the control module 110, so that the control module 110 adjusts the output voltage of the voltage regulation circuit 231-1 to improve the accuracy of the voltage regulation circuit 231-1, and thus is beneficial to improving the output voltage regulation accuracy of the power device drive power supply.

[0052] Exemplarily, the control module 110 sends a PWM signal to the voltage regulation circuit 231-1, and the voltage feedback circuit 231-2 sends the output voltage of the voltage regulation circuit 231-1 to the ADC interface of the control module 110 for the control module 110 to adjust the duty cycle of the PWM signal according to the signal received by the ADC interface.

[0053] In some embodiments, as Figure 1 shown, the power board 200 further includes a data transmission bus 240. One end of the data transmission bus 240 is connected to the second connection interface 210, and the other end is connected to the power sub-board 230.

[0054] Specifically, the power board 200 is connected to at least one power sub-board 230. Each power sub-board 230 is connected to the second connection interface 210 and thus connected to the control board 100. Arranging the data transmission bus 240 between the second connection interface 210 and the power sub-board 230 can facilitate the connection between the power sub-board 230 and the second connection interface 210 and simplify the arrangement of the power board 200.

[0055] In some embodiments, as Figure 1 shown, the power board 200 further includes a connected digital-to-analog conversion module 250 and a digital input / output interface 260. The digital-to-analog conversion module 250 is connected to the data transmission bus 240.

[0056] Specifically, the digital quantity conversion module 250 is connected to the data transmission bus 240 to obtain the control signal sent by the control module 110 to the voltage regulation circuit 231-1 on the power sub-board 230, and the feedback signal sent by the voltage feedback circuit 231-2 on the power sub-board 230 to the control module 110, and send the obtained control signal and feedback signal to the digital input / output interface 260 for display or viewing via the digital input / output interface 260, facilitating the user to view the output voltage condition of the power device driving power supply.

[0057] In addition, when the power board 200 is not connected to the control board 100, the digital input / output interface 260 can also be used to obtain a control signal and send it to the data transmission bus 240 and the voltage regulation circuit 231-1 on the power sub-board 230 via the digital quantity conversion module 250, realizing the control diversity of the power device driving power supply.

[0058] In some embodiments, as Figure 1 shown, the control board 100 further includes a first power interface 130, and the first power interface 130 is connected to the control module 110 to supply power to the control module 110 through the first power interface 130.

[0059] Specifically, the first power interface 130 is used to connect to an external power supply to provide power support for the control module 110 and ensure the normal operation of the control module 110.

[0060] In some embodiments, as Figure 1 shown, the power board 200 further includes a second power interface 280, and the second power interface 280 is connected to the input end of the power sub-board 230.

[0061] Specifically, the second power interface 280 is used to connect to an external power supply to input power to the power sub-board 230, so that the voltage regulation circuit 231-1 of the power sub-board 230 can adjust the voltage of the input power supply and output it, serving as the power supply end of the voltage regulation circuit 231-1.

[0062] In some embodiments, as Figure 1 shown, the control board 100 further includes a communication interface 140, and the communication interface 140 is connected to the control module 110 to send a control instruction to the control module 110 through the communication interface 140.

[0063] Specifically, the communication interface 140 is used to connect to a host computer so that the user can control the control module 110 through the host computer.

[0064] In addition, the communication interface 140 can also be used to wirelessly connect to a host computer remotely, that is, the control module 110 can be controlled through remote operation, and then the power device drive power supply can be controlled, further enhancing the practicability of the power device drive power supply.

[0065] In some embodiments, as Figure 1 shown, the power board 200 further includes a power output bus 270. One end of the power output bus 270 is connected to the output end of the power sub-board 230, and the other end is connected to the power output interface 220.

[0066] Specifically, the power output bus 270 is located between the output end of the power sub-board 230 and the power output interface 220 for connecting the output end of the power sub-board 230 and the power output interface 220. The power output interface 220 includes a plurality of power connection interfaces, and each power connection interface is connected to a voltage regulation channel 231 of the power sub-board 230 to realize the independent output of the voltage regulation channel 231, thereby facilitating the individual application of the voltage regulation channel 231.

[0067] It should be noted that each power connection interface includes three terminals (positive, negative, and common) to supply power to the power device.

[0068] In some embodiments, the voltage regulation circuit 231-1 includes a flyback topology circuit.

[0069] Specifically, the flyback topology circuit includes a high-frequency transformer, a switching tube, a freewheeling diode, a storage inductor, and an output filter capacitor, which is responsible for converting the input voltage into a stable single-channel output voltage. The application of the flyback topology achieves a good balance between the conversion efficiency and the volume of the power device drive power supply, making it suitable for complex dynamic test environments.

[0070] In some embodiments, the voltage feedback circuit 231-2 includes a linear optocoupler feedback circuit.

[0071] Specifically, the linear optocoupler feedback circuit is composed of a linear optocoupler, a voltage detection circuit, and an adjustment circuit, which can collect the output voltage of the voltage regulation circuit 231-1 in real time and transmit it to the control module 110 to realize the closed-loop regulation of the output voltage of the voltage regulation circuit 231-1, which is beneficial to improving the output accuracy and regulation accuracy of the power device drive power supply.

[0072] Based on the same inventive concept, the present application also provides a method applied to the multi-channel adjustable power device drive power supply as described above. The method includes:

[0073] Step S100, the control module 110 sends a control signal to the power sub-board 230 through the first connection interface 120 and the second connection interface 210;

[0074] Specifically, the control module 110 sends a control signal to the power sub-board 230 on the power board 200, so that the power sub-board 230 adjusts and outputs the voltage based on this control signal.

[0075] It should be noted that the behavior of the control module 110 sending the control signal can be controlled by a host computer connected to the control board 100.

[0076] Step S200, the power sub-board 230 determines the output voltage based on the control signal and outputs it through the power output interface 220.

[0077] Specifically, the power sub-board 230 outputs a voltage adapted to the control signal under the action of the control signal, and outputs it through the power output interface 220 of the control board 100.

[0078] In this embodiment, the output voltage of the power device driving power supply is controlled by the control module 110, thereby realizing the adjustability of the output voltage of the power device driving power supply, which is beneficial to improving the practicability of the power device driving power supply.

[0079] In some embodiments, step S200: the power sub-board 230 determines the output voltage based on the control signal and outputs it through the power output interface 220, including:

[0080] Step S201, the voltage regulation channel 231 of the power sub-board 230 determines the output voltage based on the control signal and outputs it through the power output interface 220.

[0081] Specifically, the voltage regulation channel 231 on the power sub-board 230 is the acting unit of the control signal, to adjust the voltage according to the control signal and use the adjusted voltage as the output voltage, and output it through the power output interface 220.

[0082] In this embodiment, the voltage regulation channel 231 of the power sub-board 230 receives the control signal and performs voltage regulation to output. There is at least one such voltage regulation channel 231 on the power sub-board 230, and the power device driving power supply has at least one such power sub-board 230, realizing the integration of multiple voltage regulation channels 231 in the power device driving power supply, avoiding the redundant setting of multiple independent power supplies, simplifying the design of the power device driving power supply, and saving costs at the same time.

[0083] In some embodiments, the method further includes:

[0084] Step S300, the voltage regulation circuit 231-1 of the voltage regulation channel 231 determines an output voltage based on the control signal and outputs it through the power output interface 220;

[0085] Specifically, the voltage regulation circuit 231-1 receives the control signal, regulates the voltage received at its input end based on the control signal to obtain the output voltage, and outputs it via the voltage output interface.

[0086] Step S400, the voltage feedback circuit 231-2 of the voltage regulation channel 231 converts the output voltage of the voltage regulation circuit 231-1 into a feedback signal and sends it to the control module 110;

[0087] Specifically, the voltage feedback circuit 231-2 obtains the output voltage output by the voltage regulation circuit 231-1, converts the output voltage to obtain the feedback signal, and sends it to the control module 110.

[0088] Step S500, the control module 110 obtains an adjusted control signal based on the feedback signal and the control signal, and sends it to the voltage regulation circuit 231-1.

[0089] Specifically, the control module 110 adjusts the control signal based on the difference between the control signal output by it to the voltage regulation circuit 231-1 and the feedback signal to obtain an adjusted control signal, and continues to send it to the voltage regulation circuit 231-1. In this way, the cycle is repeated, so that the difference between the output voltage and the output voltage corresponding to the control signal is reduced, which is beneficial to improving the output voltage accuracy of the power device drive power supply.

[0090] Those of ordinary skill in the art should understand that: the discussion of any above embodiment is only exemplary, and is not intended to imply that the scope of the present application (including the claims) is limited to these examples; under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, and they are not provided in detail for the sake of brevity.

[0091] The embodiments of the present invention are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A multi-channel adjustable power device driving power supply, characterized in that Comprising: A control board, including a control module and a first connection interface connected thereto; A power board, including a second connection interface, a power output interface, and at least one power sub-board, the second connection interface being connected to the first connection interface, the control end of the power sub-board being connected to the second connection interface, and the output end of the power sub-board being connected to the power output interface; The power sub-board is configured to adjust and output a voltage based on the control module.

2. The multi-channel adjustable power device driving power supply according to claim 1, characterized in that The power sub-board includes at least one voltage regulation channel, the control end of the voltage regulation channel being connected to the second connection interface, and the output end of the voltage regulation channel being connected to the power output interface.

3. The multi-channel adjustable power device driving power supply according to claim 2, wherein The voltage regulation channel includes a voltage regulation circuit and a voltage feedback circuit, the control end of the voltage regulation circuit and the output end of the voltage feedback circuit being both connected to the second connection interface, and the input end of the voltage feedback circuit being connected to the output end of the voltage regulation circuit.

4. The multi-channel adjustable power device driving power supply according to claim 3, characterized in that The power board further includes a data transmission bus, one end of the data transmission bus being connected to the second connection interface, and the other end being connected to the power sub-board.

5. The multi-channel adjustable power device driving power supply according to claim 4, wherein The power board further includes a digital-to-analog conversion module and a digital input / output interface connected thereto, the digital-to-analog conversion module being connected to the data transmission bus.

6. The multi-channel adjustable power device driving power supply according to claim 1, characterized in that, The control board further includes a first power interface, the first power interface being connected to the control module to supply power to the control module through the first power interface.

7. The multi-channel adjustable power device driving power supply according to claim 1, wherein The power board further includes a second power interface, the second power interface being connected to the input end of the power sub-board.

8. The multi-channel adjustable power device driving power supply according to claim 1, wherein The control board further includes a communication interface, the communication interface being connected to the control module to send control instructions to the control module through the communication interface.

9. The multi-channel adjustable power device driving power supply according to claim 1, wherein The power board further includes a power output bus, one end of the power output bus being connected to the output end of the power sub-board, and the other end being connected to the power output interface.

10. The multi-channel adjustable power device driving power supply according to claim 3, characterized in that, The voltage regulation circuit includes a flyback topology circuit.

11. The multi-channel adjustable power device driving power supply according to claim 3, characterized in that, The voltage feedback circuit includes a linear optocoupler feedback circuit.

12. A method applied to a multi-channel adjustable power device driving power supply as described in any one of claims 1 to 11, characterized in that, Comprising: The control module sends a control signal to the power sub-board through the first connection interface and the second connection interface; The power sub-board determines the output voltage based on the control signal and outputs it through the power output interface.

13. The method according to claim 12, wherein The power sub-board determines the output voltage based on the control signal and outputs it through the power output interface, including: The voltage regulation channel of the power sub-board determines the output voltage based on the control signal and outputs it through the power output interface.

14. The method according to claim 13, characterized in that, Further comprising: The voltage regulation circuit of the voltage regulation channel determines the output voltage based on the control signal and outputs it through the power output interface; The voltage feedback circuit of the voltage regulation channel converts the output voltage of the voltage regulation circuit into a feedback signal and sends it to the control module; The control module obtains an adjusted control signal based on the feedback signal and the control signal and sends it to the voltage regulation circuit.

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