Test power supply system of high-voltage high-power module

Abstract

The invention provides a test power supply system of a high-voltage high-power module, which comprises a primary rectification module, an inversion module, a boosting module, a secondary rectification module and an energy storage module, and is characterized in that the primary rectification module is used for converting an input alternating current power frequency power supply into direct current and inputting the direct current into the inversion module; the inversion module is used for inverting the direct current into high-frequency alternating current and inputting the high-frequency alternating current into the boosting module; the boosting module is used for further boosting the inverted high-frequency alternating current to target voltage and inputting the target voltage to the secondary rectification module; the secondary rectification module is used for converting the high-frequency high-voltage alternating current into high-voltage direct current and inputting the high-voltage direct current into the energy storage module; and the energy storage module is used for storing the high-voltage direct current in a super capacitor and providing instantaneous high-power direct current output for back-end equipment. According to the invention, the IR2153 control chip and the IGBT are combined, so that the efficiency and stability of power conversion are improved, and the working reliability of the system under high-voltage and high-power output conditions is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply systems, and in particular to a test power supply system for a high-voltage and high-power module. Background Art

[0002] The power module is one of the core components of rail transit converters and other industrial electric transmission equipment. During the testing of the power module, the power supply device is indispensable. The main levels of DC power supply voltage of the power module are 750V, 1500V, 2800V, 3600V, etc. The current testing method for power modules is mainly chopping test. At present, the power supply voltage of most chopping equipment on the market is below DC 2000V.

[0003] At present, the mainstream power supply equipment for power module testing on the market, whether small low-power power supply equipment or large high-power power supply equipment, is limited by the voltage level of internal devices, and most of them are below 2000V. Although power supplies below 2000V can meet the testing requirements of most power modules and most functional tests of power modules above 2000V, power modules have many characteristics that must be tested at rated voltage. The current high-voltage power supply cost is relatively high, and the high-voltage power supply resources of various companies are limited, which easily leads to the problem of excessively high cost of high-voltage power module testing.

[0004] In addition, independent power supply cabinets are generally powered by AC380V. The internal input AC power is rectified, the DC voltage is inverted and controlled, and a control algorithm is added during the inversion process to adjust the voltage, and finally it is rectified to obtain DC power. The power supply equipment needs to be equipped with complex control circuits and complex control algorithms, and the maximum power of AC380V power supply is also easily limited. Using AC380V power supply will result in the maximum power being limited, which cannot meet the high power requirements during the power module test. Secondly, the maximum output voltage will also be limited, which cannot meet the test requirements of high-voltage power modules. Summary of the invention

[0005] According to the technical problems raised above, a test power supply system for high-voltage and high-power modules is provided. The present invention mainly includes a primary rectifier module, an inverter module, a boost module, a secondary rectifier module and an energy storage module. The high-voltage and high-power power module test power supply device only needs AC380V power supply, can provide high-power output in a short time, effectively solves the problems of large size and inconvenience in use of existing high-voltage power supply equipment, and improves the test efficiency of high-voltage power modules.

[0006] The technical means adopted by the present invention are as follows:

[0007] A test power supply system for a high-voltage and high-power module includes: a primary rectifier module, an inverter module, a boost module, a secondary rectifier module and an energy storage module, wherein:

[0008] The primary rectifier module is used to convert the input AC power supply into DC power and input it into the inverter module;

[0009] The inverter module is used to invert direct current into high-frequency alternating current and input it into the boost module;

[0010] The boost module is used to further boost the inverted high-frequency alternating current to a target voltage and input it into the secondary rectifier module;

[0011] The secondary rectifier module is used to convert high-frequency high-voltage alternating current into high-voltage direct current and input it into the energy storage module;

[0012] The energy storage module is used to store high-voltage direct current in a supercapacitor and provide instantaneous high-power direct current output for back-end equipment.

[0013] Furthermore, the primary rectification module adopts a full-bridge rectification circuit, and the diodes in the full-bridge rectification circuit adopt high-frequency and high-voltage rectification diodes.

[0014] Furthermore, the inverter module includes: a control circuit, a drive circuit and a resistor voltage divider feedback circuit. The control circuit uses a chip with high and low side gate drive. The resistor voltage divider feedback circuit is arranged at the input end of the inverter module to reduce the high voltage to a safe voltage through resistor voltage division.

[0015] Furthermore, the transformer in the boost module can meet high voltage and high frequency working conditions, and the high frequency winding can be designed according to the target voltage level.

[0016] Furthermore, the secondary rectification module comprises a rectification diode and a filtering capacitor, the rectification diode is a high-voltage rectification diode, and the filtering capacitor is a high-voltage withstand capacitor, so as to reduce the ripple of the output voltage.

[0017] Furthermore, the energy storage module includes a supercapacitor group and a voltage balancing circuit. The supercapacitor group adopts a series-parallel combination connection mode to meet voltage and capacity requirements. The voltage balancing circuit is used to maintain the supercapacitor group to work stably under high voltage.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] The test power supply system for high-voltage and high-power modules provided by the present invention realizes high-voltage DC4000V output through industrial frequency AC380V input, simplifies the input requirements of high-voltage power supply, avoids the 10kV power supply required by traditional high-voltage systems, and reduces the dependence on high-voltage approval of the power grid. The present invention adopts a multi-stage power conversion structure of primary rectification, inversion, boost and secondary rectification, combined with IR2153 control chip and IGBT, improves the efficiency and stability of power conversion, and ensures the working reliability of the system under high-voltage and high-power output conditions.

[0020] The test power supply system for high-voltage and high-power modules provided by the present invention samples high-voltage signals through resistor voltage division and feeds back to the control system, replacing the traditional high-voltage voltage sensor, reducing system costs, simplifying circuit design, and reducing equipment complexity. In addition, the addition of supercapacitor energy storage modules enables the system to have the ability of instantaneous high-power output, meeting the test requirements of high-voltage power modules in a short period of time, and improving the response speed and continuous power supply capacity of the power supply system.

[0021] The test power supply system for high-voltage and high-power modules provided by the present invention has a supercapacitor module that adopts a series-parallel structure, and the capacity can be flexibly expanded to meet the needs of different test environments and power modules, and has good scalability. The system of the present invention adopts a multi-level insulation and high-voltage isolation design, which reduces the safety hazards caused by high voltage, and at the same time has undervoltage, overcurrent and other protection functions, thereby improving overall safety. By rationally utilizing AC380V mains power, the complexity and bulky size of high-voltage equipment are avoided, the flexibility and portability of the system are increased, and the resource utilization efficiency of the power module is effectively improved.

[0022] Based on the above reasons, the present invention can be widely promoted in the fields of power supply systems and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 This is a framework diagram of the test power supply system for the high-voltage and high-power modules in the present invention.

[0025] Figure 2 This is a full-bridge rectifier circuit diagram of the primary rectifier module in the present invention.

[0026] Figure 3 This is a circuit diagram of the inverter module and boost module in the present invention.

[0027] Figure 4 It is a schematic diagram of the structure of the supercapacitor group in the present invention. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0032] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0033] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0034] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0035] like Figure 1 As shown, the present invention provides a test power supply system for high-voltage and high-power modules, which uses AC380V input power to achieve DC4000V high-voltage output through a multi-stage power conversion process, and finally stores it in a supercapacitor and is used to provide a stable high-power DC power supply for back-end equipment. The present invention includes: a primary rectifier module, an inverter module, a boost module, a secondary rectifier module and an energy storage module, wherein:

[0036] The primary rectifier module is used to convert the input AC380V industrial frequency power into direct current and input it to the inverter module;

[0037] In specific implementation, as a preferred embodiment of the present invention, the primary rectifier module adopts a full-bridge rectifier circuit, and the diodes in the full-bridge rectifier circuit adopt high-frequency and high-voltage rectifier diodes.

[0038] The inverter module is used to invert direct current into high-frequency alternating current and input it into the boost module;

[0039] In specific implementation, as a preferred embodiment of the present invention, the inverter module includes: a control circuit, a drive circuit and a resistor voltage divider feedback circuit. The control circuit adopts a chip with high and low side gate drive. The resistor voltage divider feedback circuit is arranged at the input end of the inverter module, and the high voltage is reduced to a safe voltage through resistor voltage division.

[0040] In implementation, the IR2153 control drive module and IGBT are used as the main power devices. The IR2153 chip is used to drive the IGBT to achieve high-frequency inversion. The IR2153 has its own high and low-side gate drive, which can simplify the circuit design. The high-voltage output end reduces the high-voltage signal to a safe voltage through a resistor divider and inputs it to the feedback input end of the IR2153 control chip, thereby adjusting and controlling the output voltage, eliminating the need for a high-voltage voltage sensor.

[0041] The boost module is used to further boost the inverted high-frequency alternating current to a target voltage and input it into the secondary rectifier module;

[0042] In specific implementation, as a preferred embodiment of the present invention, the transformer in the boost module can meet the working conditions of high voltage and high frequency, ensuring that the inverter output voltage can be stably increased to the required voltage level. The high-frequency winding is designed according to the target voltage level to meet the high-voltage output requirements. The insulation and withstand voltage capabilities of the transformer must meet the 4000V output standard and have a good heat dissipation design.

[0043] The secondary rectifier module is used to convert high-frequency high-voltage alternating current into high-voltage direct current and input it into the energy storage module;

[0044] In specific implementation, as a preferred embodiment of the present invention, the secondary rectifier module includes a rectifier diode and a filter capacitor. The rectifier diode adopts a high-voltage rectifier diode and is configured with a sufficient withstand voltage level. The filter capacitor adopts a high-voltage withstand voltage capacitor to reduce the ripple of the output voltage.

[0045] During implementation, high-frequency and high-voltage alternating current is converted into high-voltage direct current through a secondary rectifier module, and a smooth DC4000V power supply is obtained through a filter circuit.

[0046] The energy storage module is used to store high-voltage direct current in a supercapacitor and provide instantaneous high-power direct current output for back-end equipment.

[0047] In specific implementation, as a preferred embodiment of the present invention, the energy storage module includes a supercapacitor group and a voltage balancing circuit. The supercapacitor group adopts a series-parallel combination connection method to meet the voltage and capacity requirements. The voltage balancing circuit is used to maintain the supercapacitor group to work stably under high voltage.

[0048] During implementation, the DC4000V high-voltage power supply will be stored in supercapacitors to provide instantaneous high-power DC output for back-end equipment. In terms of capacity design, if a larger power reserve is required, the number of supercapacitors in series and parallel can be increased.

[0049] Example

[0050] like Figure 1 As shown, the present invention provides a test power supply system for high-voltage and high-power modules. In this embodiment, an AC380V power supply is used as the system input. After rectification, inversion, boosting, and rectification, the power supply is converted to a maximum DC4000V power supply, and the electric energy is stored in a supercapacitor. The circuit for charging the supercapacitor is equivalent to a charging circuit, and the supercapacitor is used as an energy storage circuit. During operation, only the supercapacitor works, and the charging circuit is disconnected. Since the supercapacitor has a large current discharge capability, the circuit can provide instantaneous high power.

[0051] The present invention ensures that the system can convert from AC380V input to DC4000V high-voltage output with high efficiency and stability. IR2153 assumes the core control function in the inverter control, and IGBT is responsible for high-frequency switching, which improves the circuit efficiency. By sampling high voltage through resistor voltage division, the system achieves a simplified design and reduces the use of complex sensors. In addition, the reasonable configuration of supercapacitors provides sufficient instantaneous power for the system, ensuring the test power supply requirements of the high-voltage power module. The present invention is also provided with undervoltage, overcurrent and other protection mechanisms and electrical isolation technology to ensure the safety and durability of the system when working at high voltage.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A test power supply system for a high-voltage and high-power module, characterized in that: include: Primary rectifier module, inverter module, boost module, secondary rectifier module and energy storage module, including: The primary rectifier module is used to convert the input AC power supply into DC power and input it into the inverter module; The inverter module is used to invert direct current into high-frequency alternating current and input it into the boost module; The boost module is used to further boost the inverted high-frequency alternating current to a target voltage and input it into the secondary rectifier module; The secondary rectifier module is used to convert high-frequency high-voltage alternating current into high-voltage direct current and input it into the energy storage module; The energy storage module is used to store high-voltage direct current in a supercapacitor and provide instantaneous high-power direct current output for back-end equipment.

2. The test power supply system for high-voltage and high-power modules according to claim 1, characterized in that: The primary rectifier module adopts a full-bridge rectifier circuit, and the diodes in the full-bridge rectifier circuit adopt high-frequency and high-voltage rectifier diodes.

3. The test power supply system for high-voltage and high-power modules according to claim 1, characterized in that: The inverter module includes: a control circuit, a drive circuit and a resistor voltage divider feedback circuit. The control circuit uses a chip with high and low side gate drive. The resistor voltage divider feedback circuit is arranged at the input end of the inverter module to reduce the high voltage to a safe voltage through resistor voltage division.

4. The test power supply system for high-voltage and high-power modules according to claim 1, characterized in that: The transformer in the boost module can meet high voltage and high frequency working conditions, and the high frequency winding is designed according to the target voltage level.

5. The test power supply system for high-voltage and high-power modules according to claim 1, characterized in that: The secondary rectification module comprises a rectification diode and a filtering capacitor. The rectification diode is a high-voltage rectification diode, and the filtering capacitor is a high-voltage withstand capacitor, so as to reduce the ripple of the output voltage.

6. The test power supply system for high-voltage and high-power modules according to claim 1, characterized in that: The energy storage module includes a supercapacitor group and a voltage balancing circuit. The supercapacitor group is connected in series and parallel to meet voltage and capacity requirements. The voltage balancing circuit is used to maintain the supercapacitor group to work stably under high voltage.

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