Multifunctional integrated converter module

Abstract

The invention provides a multifunctional integrated converter module, which belongs to the technical field of electric power and comprises a single-phase uncontrolled rectifier circuit, a three-phase inverter circuit and a three-phase uncontrolled rectifier circuit. Wherein the single-phase uncontrolled rectification circuit is used for carrying out single-phase uncontrolled rectification on a main power supply; the three-phase inverter circuit is used for performing three-phase inversion on the output of the single-phase uncontrolled rectifier circuit; and the three-phase uncontrolled rectification circuit is used for carrying out three-phase uncontrolled rectification on the output of the three-phase inverter circuit. The power density of the converter module is large, no capacitor is needed in the converter module, installation and maintenance are convenient, and the operation cost is reduced. The converter module is high in compatibility, and all power devices are serialized and packaged in a standardized mode. And the arrangement mode of the devices and the structure of the low-inductance composite busbar are optimized, so that the stray inductance parameter of the converter module is reduced to the minimum, and the advantages of the high-power devices are more favorably exerted.

Description

Technical Field

[0001] The present application belongs to the field of electric power technology, and specifically relates to a multifunctional integrated converter module. Background Art

[0002] The converter modules in the prior art often have a single function. If multiple functions are required, multiple converter modules with different functions often need to be combined together to achieve the multiple functions. In this way, the converter modules are often huge in size. When the converter modules are huge in size, the heat dissipation problem is difficult to solve. If an air-cooled heat dissipation mode is adopted, it is generally difficult to meet the requirements of large power device losses and dense arrangement. In addition, the internal power devices in multiple converter modules with different functions often have different packaging standards, and compatibility issues are difficult to solve. Summary of the invention

[0003] Based on the above technical problems, the present application proposes a multifunctional integrated converter module, which integrates a single-phase uncontrolled rectifier circuit, a three-phase inverter circuit and a three-phase uncontrolled rectifier circuit, and uses a composite phase change heat sink to dissipate heat for the above circuits, thereby solving the heat dissipation problem of the integrated converter module.

[0004] The multifunctional integrated converter module comprises: a single-phase uncontrolled rectifier circuit, a three-phase inverter circuit, and a three-phase uncontrolled rectifier circuit;

[0005] The positive electrode of the total power supply is connected to the positive input terminal of the single-phase uncontrolled rectifier circuit, the negative electrode of the total power supply is connected to the negative input terminal of the single-phase uncontrolled rectifier circuit, the positive output terminal of the single-phase uncontrolled rectifier circuit is connected to the positive input terminal of the three-phase inverter circuit, the negative output terminal of the single-phase uncontrolled rectifier circuit is connected to the negative input terminal of the three-phase inverter circuit, and the output terminal of the three-phase inverter circuit is connected to the input terminal of the three-phase uncontrolled rectifier circuit;

[0006] The single-phase uncontrolled rectification circuit is used to perform single-phase uncontrolled rectification on the total power supply;

[0007] The three-phase inverter circuit is used to perform three-phase inversion on the output of the single-phase uncontrolled rectifier circuit;

[0008] The three-phase uncontrolled rectification circuit is used for performing three-phase uncontrolled rectification on the output of the three-phase inverter circuit.

[0009] The single-phase uncontrolled rectifier circuit comprises: a first diode, a second diode, a third diode and a fourth diode;

[0010] The cathode of the first diode is connected to the positive output end of the single-phase uncontrolled rectifier circuit, the anode of the first diode is respectively connected to the positive input end of the single-phase uncontrolled rectifier circuit and the cathode of the second diode, the anode of the second diode is connected to the negative output end of the single-phase uncontrolled rectifier circuit, the cathode of the third diode is connected to the positive output end of the single-phase uncontrolled rectifier circuit, the anode of the third diode is respectively connected to the negative input end of the single-phase uncontrolled rectifier circuit and the cathode of the fourth diode, and the anode of the fourth diode is connected to the negative output end of the single-phase uncontrolled rectifier circuit.

[0011] The three-phase inverter circuit includes: a power supply unit, a first drive unit, a second drive unit, a third drive unit, a pulse distribution unit, a first power device, a second power device, a third power device, a fourth power device, a fifth power device, and a sixth power device;

[0012] The output end of the power supply unit is respectively connected to the power supply input end of the first drive unit, the power supply input end of the second drive unit, and the power supply input end of the third drive unit; the signal end of the first drive unit, the signal end of the second drive unit, and the signal end of the third drive unit are respectively connected to the pulse distribution unit; the driving output end of the first drive unit is respectively connected to the driving end of the first power device and the driving end of the fourth power device; the driving output end of the second drive unit is respectively connected to the driving end of the second power device and the driving end of the fifth power device; and the driving output end of the third drive unit is respectively connected to the driving end of the third power device and the driving end of the sixth power device;

[0013] The power supply unit is used to provide power input for the first driving unit, the second driving unit, and the third driving unit;

[0014] The first driving unit is used to drive the first power device and the fourth power device to turn on or off according to the driving signal sent by the pulse distribution unit;

[0015] The second driving unit is used to drive the second power device and the fifth power device to turn on or off according to the driving signal sent by the pulse distribution unit;

[0016] The third driving unit is used to drive the third power device and the sixth power device to turn on or off according to the driving signal sent by the pulse distribution unit;

[0017] The pulse distribution unit is used to receive an external driving signal and forward the driving signal to the first driving unit, the second driving unit, and the third driving unit, while monitoring the first power device, the second power device, the third power device, the fourth power device, the fifth power device, and the sixth power device.

[0018] The three-phase uncontrolled rectifier circuit comprises: a fifth diode, a sixth diode, a seventh diode, an eighth diode, a ninth diode and a tenth diode;

[0019] The first input end of the three-phase uncontrolled rectifier circuit is respectively connected to the anode of the fifth diode and the cathode of the sixth diode, the second input end of the three-phase uncontrolled rectifier circuit is respectively connected to the anode of the seventh diode and the cathode of the eighth diode, the third input end of the three-phase uncontrolled rectifier circuit is respectively connected to the anode of the ninth diode and the cathode of the tenth diode, the cathode of the fifth diode, the cathode of the seventh diode and the cathode of the ninth diode are respectively connected to the positive output end of the three-phase uncontrolled rectifier circuit, and the anode of the sixth diode, the anode of the eighth diode and the anode of the tenth diode are respectively connected to the negative output end of the three-phase uncontrolled rectifier circuit.

[0020] The multifunctional integrated converter module further includes a control box, in which the power supply unit, the first drive unit, the second drive unit, the third drive unit, and the pulse distribution unit are arranged.

[0021] The multifunctional integrated converter module also includes: a segmented phase-change heat sink, the interior of the segmented phase-change heat sink is a refrigerant material, and a forced air cooling method is used to dissipate heat for the single-phase uncontrolled rectifier circuit, the three-phase inverter circuit and the three-phase uncontrolled rectifier circuit.

[0022] The fins of the segmented phase change heat sink are welded in multiple sections on the heat dissipation substrate of the segmented phase change heat sink. One section of the fin dissipates heat for a device arrangement area, and the device arrangement area includes one of a single-phase uncontrolled rectifier circuit, a three-phase inverter circuit, and a three-phase uncontrolled rectifier circuit.

[0023] A stacking process is adopted between the positive output end of the single-phase uncontrolled rectifier circuit, the negative output end of the single-phase uncontrolled rectifier circuit, the positive input end of the three-phase inverter circuit, and the negative input end of the three-phase inverter circuit; an insulating layer is arranged between the positive output end of the single-phase uncontrolled rectifier circuit and the negative output end of the single-phase uncontrolled rectifier circuit; and an insulating layer is arranged between the positive input end of the three-phase inverter circuit and the negative input end of the three-phase inverter circuit.

[0024] A stacking process is adopted between the positive output end of the three-phase uncontrolled rectifier circuit and the negative output end of the three-phase uncontrolled rectifier circuit, and an insulating layer is arranged between the positive output end of the three-phase uncontrolled rectifier circuit and the negative output end of the three-phase uncontrolled rectifier circuit.

[0025] The first diode, the second diode, the third diode, the fourth diode, the fifth diode, the sixth diode, the seventh diode, the eighth diode, the ninth diode, the tenth diode, the first power device, the second power device, the third power device, the fourth power device, the fifth power device, and the sixth power device are all packaged using the same standard.

[0026] Beneficial effects:

[0027] This application proposes a multifunctional integrated converter module that integrates multiple functional units, has a compact structure, high power density, does not require capacitors in the module, is easy to install and maintain, and reduces operating costs. The converter module has strong compatibility, and the power devices all use serialized and standardized packaging devices. In addition, the arrangement of the devices and the structure of the low-inductance composite busbar are optimized to minimize the stray inductance parameters of the module, which is more conducive to giving full play to the advantages of the devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of a multifunctional integrated converter module according to an embodiment of the present application;

[0029] Figure 2 The schematic diagram of the single-phase uncontrolled rectifier circuit and the three-phase inverter circuit of the embodiment of the present application;

[0030] Figure 3 A schematic diagram of a three-phase uncontrolled rectifier circuit according to an embodiment of the present application;

[0031] Figure 4 A schematic diagram of a segmented phase change heat sink according to an embodiment of the present application;

[0032] Figure 5 A schematic diagram of a stacking process according to an embodiment of the present application;

[0033] Figure 6 A schematic diagram of an external port of a multifunctional integrated converter module according to an embodiment of the present application;

[0034] Figure 7 This is a front device layout diagram of a multifunctional integrated converter module according to an embodiment of the present application;

[0035] Figure 8 A back-side device layout diagram of a multifunctional integrated converter module according to an embodiment of the present application;

[0036] Fig. 9 A physical picture of an IHM B packaged diode device of a multifunctional integrated converter module according to an embodiment of the present application;

[0037] Fig.10 This is a physical picture of the IGBT device of the multifunctional integrated converter module according to an embodiment of the present application. DETAILED DESCRIPTION

[0038] The present disclosure is further described below in conjunction with the embodiments shown in the accompanying drawings.

[0039] Converter devices are widely used in various fields and have a wide variety of applications. However, they can be divided into four categories according to the operating mode: rectification, DC conversion, inversion and AC conversion. A complex power conversion system often uses multiple topology circuits. Realizing multiple conversions in a limited space is conducive to improving the power density of the system.

[0040] In the prior art, converter modules often have only a single function, and even if multiple functions are integrated, it is difficult to solve the heat dissipation problem. The present application proposes a multifunctional integrated converter module that can simultaneously or selectively realize single-phase uncontrolled rectification, three-phase inverter, and three-phase uncontrolled rectification, with increased power density and compact space; and a segmented phase change heat sink is used to dissipate heat for the single-phase uncontrolled rectification circuit, the three-phase inverter circuit, and the three-phase uncontrolled rectification circuit. The air cooling method can still meet the heat dissipation requirements of large-loss modules, and the fin distribution area can be adjusted or the number of fins can be increased or decreased according to the loss differences of different power levels. All power devices use the same series of standard packages, and devices of different voltage and current levels can be used according to the requirements of different power levels.

[0041] Example:

[0042] This embodiment provides a multifunctional integrated converter module, such as Figure 1 As shown, it includes: a single-phase uncontrolled rectifier circuit, a three-phase inverter circuit, and a three-phase uncontrolled rectifier circuit;

[0043] The positive electrode of the total power supply is connected to the positive input terminal a1 of the single-phase uncontrolled rectifier circuit, the negative electrode of the total power supply is connected to the negative input terminal x1 of the single-phase uncontrolled rectifier circuit, the positive output terminal Ud1+ of the single-phase uncontrolled rectifier circuit is connected to the positive input terminal Ud2+ of the three-phase inverter circuit, the negative output terminal Ud1- of the single-phase uncontrolled rectifier circuit is connected to the negative input terminal Ud2- of the three-phase inverter circuit, the output terminal U1 of the three-phase inverter circuit, the output terminal W1 of the three-phase inverter circuit and the output terminal V1 of the three-phase inverter circuit are respectively connected to the input terminal of the three-phase uncontrolled rectifier circuit, the positive output terminal of the three-phase uncontrolled rectifier circuit is DC+, and the negative output terminal of the three-phase uncontrolled rectifier circuit is DC-;

[0044] The single-phase uncontrolled rectification circuit is used for single-phase uncontrolled rectification of the total power supply;

[0045] The three-phase inverter circuit is used to perform three-phase inversion on the output of the single-phase uncontrolled rectifier circuit;

[0046] The three-phase uncontrolled rectification circuit is used for performing three-phase uncontrolled rectification on the output of the three-phase inverter circuit.

[0047] This embodiment integrates three functional units, namely, a single-phase uncontrolled rectifier circuit, a three-phase inverter circuit, and a three-phase uncontrolled rectifier circuit, on the same module, and arranges them reasonably based on the mechanical size of the device, wherein the positive input terminal a1 of the single-phase uncontrolled rectifier circuit, the negative input terminal x1 of the single-phase uncontrolled rectifier circuit, the positive output terminal Ud1+ of the single-phase uncontrolled rectifier circuit, the negative output terminal Ud1- of the single-phase uncontrolled rectifier circuit, the positive input terminal Ud2+ of the three-phase inverter circuit, the negative input terminal Ud2- of the three-phase inverter circuit, the output terminal U1 of the three-phase inverter circuit, the output terminal W1 of the three-phase inverter circuit, the output terminal V1 of the three-phase inverter circuit, the positive output terminal DC+ of the three-phase uncontrolled rectifier circuit, and the negative output terminal DC- of the three-phase uncontrolled rectifier circuit are all external interfaces of the multifunctional integrated converter module, such as Figure 6 As shown, three spare output terminals are reserved at the output terminal of the three-phase inverter circuit, namely, the output terminal U2 of the three-phase inverter circuit, the output terminal W2 of the three-phase inverter circuit, and the output terminal V3 of the three-phase inverter circuit.

[0048] In a specific implementation, by inputting the total power supply between the positive input terminal a1 of the single-phase uncontrolled rectifier circuit and the negative input terminal x1 of the single-phase uncontrolled rectifier circuit, the positive output terminal Ud1 of the single-phase uncontrolled rectifier circuit and the negative output terminal Ud1- of the single-phase uncontrolled rectifier circuit have a DC voltage. It can be understood that Figure 1 What is given is a main circuit diagram. In order to realize the monitoring and other functions of a specific converter module, other auxiliary circuits are also required. The auxiliary circuits are not shown in this embodiment, but those skilled in the art can add auxiliary circuits according to the description of this embodiment to realize other functions of the converter module.

[0049] In order to further control the single-phase uncontrolled rectifier circuit, the three-phase inverter circuit, and the three-phase uncontrolled rectifier circuit in a specific implementation, a transformer, a first contactor, a second contactor, and a filter may be arranged between the three-phase inverter circuit and the three-phase uncontrolled rectifier circuit. Figure 1 As shown;

[0050] The output end U1 of the three-phase inverter circuit, the output end W1 of the three-phase inverter circuit and the output end V1 of the three-phase inverter circuit are respectively connected to the input end of the transformer, the output end U3 of the transformer, the output end W3 of the transformer and the output end V3 of the transformer are respectively connected to the input end of the three-phase uncontrolled rectifier circuit, the positive output end of the three-phase uncontrolled rectifier circuit is DC+, and the negative output end of the three-phase uncontrolled rectifier circuit is DC-;

[0051] At this time, the three-phase uncontrolled rectification circuit is used to perform three-phase uncontrolled rectification on the output of the transformer.

[0052] The first end of the first contactor is connected to the output end of the transformer, the second end of the first contactor is connected to the input end of the filter, the output end of the three-phase uncontrolled rectifier circuit is connected to the third end of the second contactor, and the fourth end of the second contactor is connected to the input end of the filter;

[0053] When the first contactor is closed and the second contactor is open, there is no output voltage between the positive output terminal DC+ of the three-phase uncontrolled rectifier circuit and the negative output terminal DC- of the three-phase uncontrolled rectifier circuit;

[0054] When the first contactor is opened and the second contactor is closed, an output voltage exists between the positive output terminal DC+ of the three-phase uncontrolled rectifier circuit and the negative output terminal DC- of the three-phase uncontrolled rectifier circuit.

[0055] In a specific implementation, in order to control the output of the three-phase uncontrolled rectifier circuit, the closed and open states of the first contactor and the second contactor can be utilized. When the first contactor is closed and the second contactor is open, the three-phase uncontrolled rectifier circuit cannot output voltage. When the first contactor is open and the second contactor is closed, the three-phase uncontrolled rectifier circuit can output voltage.

[0056] In this embodiment, the single-phase uncontrolled rectifier circuit includes: a first diode D11, a second diode D12, a third diode D21 and a fourth diode D22. Figure 2 As shown;

[0057] The cathode of the first diode D11 is connected to the positive output terminal Ud1+ of the single-phase uncontrolled rectifier circuit, the anode of the first diode D11 is respectively connected to the positive input terminal a1 of the single-phase uncontrolled rectifier circuit and the cathode of the second diode D12, the anode of the second diode D12 is connected to the negative output terminal Ud1- of the single-phase uncontrolled rectifier circuit, the cathode of the third diode D21 is connected to the positive output terminal Ud1+ of the single-phase uncontrolled rectifier circuit, the anode of the third diode D21 is respectively connected to the negative input terminal x1 of the single-phase uncontrolled rectifier circuit and the cathode of the fourth diode D22, and the anode of the fourth diode D22 is connected to the negative output terminal Ud1- of the single-phase uncontrolled rectifier circuit.

[0058] In this embodiment, the first diode D11 and the second diode D12 are packaged as diode D1, and the third diode D21 and the fourth diode D22 are packaged as diode D2. The diode D1 and the diode D2 are 140×130 packaged diode devices. When the total power supply is connected to the input end of the single-phase uncontrolled rectifier circuit, the total power supply is uncontrolled rectified by: the first diode D11, the second diode D12, the third diode D21 and the fourth diode D22, and a DC voltage is output between the positive output terminal Ud1+ of the phase uncontrolled rectifier circuit and the negative output terminal Ud1- of the single-phase uncontrolled rectifier circuit. The DC voltage is also used as the input of the three-phase inverter circuit. It can be understood that there are other auxiliary circuits between the positive input terminal Ud2+ of the phase inverter circuit and the negative input terminal Ud2- of the three-phase inverter circuit. Those skilled in the art can add various auxiliary circuits according to actual conditions to realize other various functions of the three-phase inverter circuit, which will not be described in detail in this embodiment.

[0059] The three-phase inverter circuit includes: a power supply unit, a first drive unit, a second drive unit, a third drive unit, a pulse distribution unit, a first power device VT1, a second power device VT2, a third power device VT3, a fourth power device VT4, a fifth power device VT5, and a sixth power device VT6;

[0060] The output end of the power supply unit is respectively connected to the power supply input end of the first drive unit, the power supply input end of the second drive unit, and the power supply input end of the third drive unit, the signal end of the first drive unit, the signal end of the second drive unit, and the signal end of the third drive unit are respectively connected to the pulse distribution unit, the drive output end of the first drive unit is respectively connected to the drive end of the first power device VT1 and the drive end of the fourth power device VT4, the drive output end of the second drive unit is respectively connected to the drive end of the second power device VT2 and the drive end of the fifth power device VT5, and the drive output end of the third drive unit is respectively connected to the drive end of the third power device VT3 and the drive end of the sixth power device VT6;

[0061] The power supply unit is used to provide power input for the first driving unit, the second driving unit, and the third driving unit;

[0062] The first driving unit is used to drive the first power device VT1 and the fourth power device VT4 to turn on or off according to the driving signal sent by the pulse distribution unit;

[0063] The second driving unit is used to drive the second power device VT2 and the fifth power device VT5 to turn on or off according to the driving signal sent by the pulse distribution unit;

[0064] The third driving unit is used to drive the third power device VT3 and the sixth power device VT6 to turn on or off according to the driving signal sent by the pulse distribution unit;

[0065] The pulse distribution unit is used to receive an external driving signal and forward the driving signal to the first driving unit, the second driving unit, and the third driving unit, while monitoring the first power device VT1, the second power device VT2, the third power device VT3, the fourth power device VT4, the fifth power device VT5, and the sixth power device VT6.

[0066] In this embodiment, the first power device VT1, the second power device VT2, the third power device VT3, the fourth power device VT4, the fifth power device VT5, and the sixth power device VT6 are all 140×190 packaged IGBT (Insulated Gate Bipolar Transistor) devices. In this embodiment, the multifunctional integrated converter module is equipped with an independent control box, and the power supply unit, the first drive unit, the second drive unit, the third drive unit, and the pulse distribution unit are located in the control box. The input provides DC110V to the power supply unit through a round plug, and the power supply unit outputs DC15V to the first drive unit, the second drive unit, and the third drive unit. At the same time, the pulse distribution unit is mainly used to receive instructions from an external DCU (Dedicated Control Unit) and feedback fault signals and the status of the first power device VT1, the second power device VT2, the third power device VT3, the fourth power device VT4, the fifth power device VT5, and the sixth power device VT6 to the DCU.

[0067] The three-phase uncontrolled rectifier circuit includes: a fifth diode D31, a sixth diode D32, a seventh diode D41, an eighth diode D42, a ninth diode D51 and a tenth diode D52;

[0068] The first input terminal U3 of the three-phase uncontrolled rectifier circuit is respectively connected to the anode of the fifth diode D31 and the cathode of the sixth diode D32, the second input terminal W3 of the three-phase uncontrolled rectifier circuit is respectively connected to the anode of the seventh diode D41 and the cathode of the eighth diode D42, the third input terminal V3 of the three-phase uncontrolled rectifier circuit is respectively connected to the anode of the ninth diode D51 and the cathode of the twelfth diode D52, the cathode of the fifth diode D31, the cathode of the seventh diode D41 and the cathode of the ninth diode D51 are respectively connected to the positive output terminal DC+ of the three-phase uncontrolled rectifier circuit, the anode of the sixth diode D32, the anode of the eighth diode D42 and the anode of the tenth diode D52 are respectively connected to the negative output terminal DC- of the three-phase uncontrolled rectifier circuit, as shown in FIG. Figure 3 shown.

[0069] In this embodiment, the fifth diode D31 and the sixth diode D32 are packaged as diode D3, the seventh diode D41 and the eighth diode D42 are packaged as diode D4, the ninth diode D51 and the tenth diode D52 are packaged as diode D5, and diode D3, diode D4 and diode D5 are 140×130 packaged diode devices.

[0070] The above multifunctional integrated converter module integrates three functions, namely, single-phase uncontrolled rectification, three-phase inversion and three-phase uncontrolled rectification. The multifunctional integrated converter module integrates multiple high-power devices, so it is difficult to dissipate heat naturally. This embodiment uses a segmented phase change heat sink to dissipate heat for the high-power devices integrated in the multifunctional integrated converter module. The appearance of the segmented phase change heat sink is shown in FIG. Figure 4 As shown, the interior of the segmented phase change heat sink is a refrigerant material, and forced air cooling is used to dissipate heat for a single-phase uncontrolled rectifier circuit, a three-phase inverter circuit, and a three-phase uncontrolled rectifier circuit; the fins of the segmented phase change heat sink are welded in multiple sections on the heat dissipation substrate of the segmented phase change heat sink, and one section of the fin dissipates heat for a device layout area, and the device layout area includes one of a single-phase uncontrolled rectifier circuit, a three-phase inverter circuit, and a three-phase uncontrolled rectifier circuit, such as Figure 7 , Figure 8 As shown, in a specific implementation, the device loss distribution of a device layout area can be tested, and the fins of a segmented phase change heat sink can be set for the area with high device loss. The segmented phase change heat sink is used in the high-integration and high-loss module layout, which meets the heat dissipation requirements while reducing the weight of the heat sink.

[0071] The positive output terminal Ud1+ of the single-phase uncontrolled rectifier circuit, the negative output terminal Ud1 of the single-phase uncontrolled rectifier circuit, the positive input terminal Ud2+ of the three-phase inverter circuit, and the negative input terminal Ud2- of the three-phase inverter circuit are stacked, an insulating layer is provided between the positive output terminal Ud1+ of the single-phase uncontrolled rectifier circuit and the negative output terminal Ud1 of the single-phase uncontrolled rectifier circuit, and an insulating layer is provided between the positive input terminal Ud2+ of the three-phase inverter circuit and the negative input terminal Ud2- of the three-phase inverter circuit, such as Figure 5 shown.

[0072] A stacking process is adopted between the positive output terminal DC+ of the three-phase uncontrolled rectifier circuit and the negative output terminal DC- of the three-phase uncontrolled rectifier circuit, and an insulating layer is arranged between the positive output terminal DC+ of the three-phase uncontrolled rectifier circuit and the negative output terminal of the three-phase uncontrolled rectifier circuit.

[0073] Conventional circuit input terminals are not laminated, and usually the positive input terminal (usually referring to the positive input terminal of the busbar) is on one side and the negative input terminal is on the other side. However, such a design produces a large stray inductance, resulting in a larger overvoltage. This embodiment optimizes the arrangement of the devices and the structure of the low-inductance composite busbar, so that the stray inductance parameters of the converter module are minimized, reducing the risk of overvoltage breakdown of the device.

[0074] In this embodiment, the first diode D11, the second diode D12, the third diode D21, the fourth diode D22, the fifth diode D31, the sixth diode D32, the seventh diode D41, the eighth diode D42, the ninth diode D51, the tenth diode D52, the first power device VT1, the second power device VT2, the third power device VT3, the fourth power device VT4, the fifth power device VT5, and the sixth power device VT6 are all packaged using the same standard.

[0075] All of the above diodes and power devices (i.e., IGBT devices) are IHM B standard package devices (IHM B, a new type of semiconductor power device package), wherein the single-phase uncontrolled rectifier unit includes two 140×130 packaged diode devices (including: a first diode D11, a second diode D12, a third diode D21, and a fourth diode D22), such as Fig. 9 As shown, the three-phase inverter unit includes six 190×140 packaged IGBT devices (including: a first power device VT1, a second power device VT2, a third power device VT3, a fourth power device VT4, a fifth power device VT5, and a sixth power device VT6). Fig.10 As shown, the three-phase uncontrolled rectifier unit includes three 140×130 packaged diode devices (including: the fifth diode D31, the sixth diode D32, the seventh diode D41, the eighth diode D42, the ninth diode D51, and the tenth diode D52). Devices using standard packaging can be compatible with devices of different voltage and current levels according to the different power levels of the module. Among them, two diode devices and six IGBT devices are connected to the positive and negative poles through a low-inductance composite busbar (that is, the positive output terminal Ud1+ of the single-phase uncontrolled rectifier circuit, the negative output terminal Ud1 of the single-phase uncontrolled rectifier circuit, the positive input terminal Ud2+ of the three-phase inverter circuit, and the negative input terminal Ud2- of the three-phase inverter circuit are stacked), and two types of interfaces are reserved to realize the functions of AC-DC-AC or DC-AC, and various external interfaces such as Figure 6 As shown, no further details are given here; the other three diode devices are connected into an independent three-phase uncontrolled rectification functional unit through a separate composite low-inductance busbar (that is, a stacking process is adopted between the positive output terminal DC+ of the three-phase uncontrolled rectification circuit and the negative output terminal DC- of the three-phase uncontrolled rectification circuit).

[0076] A multifunctional integrated converter module proposed in this embodiment includes: a single-phase uncontrolled rectifier circuit, a three-phase inverter circuit, and a three-phase uncontrolled rectifier circuit; wherein the single-phase uncontrolled rectifier circuit is used for single-phase uncontrolled rectification of the total power supply; the three-phase inverter circuit is used for three-phase inversion of the output of the single-phase uncontrolled rectifier circuit; the three-phase uncontrolled rectifier circuit is used for three-phase uncontrolled rectification of the output of the three-phase inverter circuit. The converter module proposed in this embodiment has a high power density, and no capacitor is required in the converter module, which is easy to install and maintain, and reduces operating costs. The converter module has strong compatibility, and the power devices all use serialized and standardized packaging devices. In addition, the arrangement of the devices and the structure of the low-inductance composite busbar are optimized to minimize the stray inductance parameters of the module, which is more conducive to giving full play to the advantages of high-power devices.

[0077] The various embodiments in the present disclosure are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0078] The protection scope of the present disclosure is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the scope and spirit of the present disclosure. If these changes and modifications fall within the scope of the claims of the present disclosure and their equivalents, the intention of the present disclosure also includes these changes and modifications.

Claims

1. A multifunctional integrated converter module, characterized in that: include: Single-phase uncontrolled rectifier circuit, three-phase inverter circuit, three-phase uncontrolled rectifier circuit; The positive electrode of the total power supply is connected to the positive input terminal of the single-phase uncontrolled rectifier circuit, the negative electrode of the total power supply is connected to the negative input terminal of the single-phase uncontrolled rectifier circuit, the positive output terminal of the single-phase uncontrolled rectifier circuit is connected to the positive input terminal of the three-phase inverter circuit, the negative output terminal of the single-phase uncontrolled rectifier circuit is connected to the negative input terminal of the three-phase inverter circuit, and the output terminal of the three-phase inverter circuit is connected to the input terminal of the three-phase uncontrolled rectifier circuit; The single-phase uncontrolled rectification circuit is used to perform single-phase uncontrolled rectification on the total power supply; The three-phase inverter circuit is used to perform three-phase inversion on the output of the single-phase uncontrolled rectifier circuit; The three-phase uncontrolled rectification circuit is used for performing three-phase uncontrolled rectification on the output of the three-phase inverter circuit.

2. The multifunctional integrated converter module according to claim 1, characterized in that: The single-phase uncontrolled rectifier circuit comprises: a first diode, a second diode, a third diode and a fourth diode; The cathode of the first diode is connected to the positive output end of the single-phase uncontrolled rectifier circuit, the anode of the first diode is respectively connected to the positive input end of the single-phase uncontrolled rectifier circuit and the cathode of the second diode, the anode of the second diode is connected to the negative output end of the single-phase uncontrolled rectifier circuit, the cathode of the third diode is connected to the positive output end of the single-phase uncontrolled rectifier circuit, the anode of the third diode is respectively connected to the negative input end of the single-phase uncontrolled rectifier circuit and the cathode of the fourth diode, and the anode of the fourth diode is connected to the negative output end of the single-phase uncontrolled rectifier circuit.

3. The multifunctional integrated converter module according to claim 1, characterized in that: The three-phase inverter circuit comprises: a power supply unit, a first drive unit, a second drive unit, a third drive unit, a pulse distribution unit, a first power device, a second power device, a third power device, a fourth power device, a fifth power device, and a sixth power device; The output end of the power supply unit is respectively connected to the power supply input end of the first drive unit, the power supply input end of the second drive unit, and the power supply input end of the third drive unit; the signal end of the first drive unit, the signal end of the second drive unit, and the signal end of the third drive unit are respectively connected to the pulse distribution unit; the driving output end of the first drive unit is respectively connected to the driving end of the first power device and the driving end of the fourth power device; the driving output end of the second drive unit is respectively connected to the driving end of the second power device and the driving end of the fifth power device; and the driving output end of the third drive unit is respectively connected to the driving end of the third power device and the driving end of the sixth power device; The power supply unit is used to provide power input for the first driving unit, the second driving unit, and the third driving unit; The first driving unit is used to drive the first power device and the fourth power device to turn on or off according to the driving signal sent by the pulse distribution unit; The second driving unit is used to drive the second power device and the fifth power device to turn on or off according to the driving signal sent by the pulse distribution unit; The third driving unit is used to drive the third power device and the sixth power device to turn on or off according to the driving signal sent by the pulse distribution unit; The pulse distribution unit is used to receive an external driving signal and forward the driving signal to the first driving unit, the second driving unit, and the third driving unit, while monitoring the first power device, the second power device, the third power device, the fourth power device, the fifth power device, and the sixth power device.

4. The multifunctional integrated converter module according to claim 1, characterized in that: The three-phase uncontrolled rectifier circuit comprises: a fifth diode, a sixth diode, a seventh diode, an eighth diode, a ninth diode and a tenth diode; The first input end of the three-phase uncontrolled rectifier circuit is respectively connected to the anode of the fifth diode and the cathode of the sixth diode, the second input end of the three-phase uncontrolled rectifier circuit is respectively connected to the anode of the seventh diode and the cathode of the eighth diode, the third input end of the three-phase uncontrolled rectifier circuit is respectively connected to the anode of the ninth diode and the cathode of the tenth diode, the cathode of the fifth diode, the cathode of the seventh diode and the cathode of the ninth diode are respectively connected to the positive output end of the three-phase uncontrolled rectifier circuit, and the anode of the sixth diode, the anode of the eighth diode and the anode of the tenth diode are respectively connected to the negative output end of the three-phase uncontrolled rectifier circuit.

5. The multifunctional integrated converter module according to claim 3, characterized in that: The multifunctional integrated converter module further includes a control box, in which the power supply unit, the first drive unit, the second drive unit, the third drive unit, and the pulse distribution unit are arranged.

6. The multifunctional integrated converter module according to claim 1, characterized in that: The multifunctional integrated converter module also includes: a segmented phase-change heat sink, the interior of the segmented phase-change heat sink is a refrigerant material, and a forced air cooling method is used to dissipate heat for the single-phase uncontrolled rectifier circuit, the three-phase inverter circuit and the three-phase uncontrolled rectifier circuit.

7. The multifunctional integrated converter module according to claim 6, characterized in that: The fins of the segmented phase change heat sink are welded in multiple sections on the heat dissipation substrate of the segmented phase change heat sink. One section of the fin dissipates heat for a device arrangement area, and the device arrangement area includes one of a single-phase uncontrolled rectifier circuit, a three-phase inverter circuit, and a three-phase uncontrolled rectifier circuit.

8. The multifunctional integrated converter module according to claim 1, characterized in that: A stacking process is adopted between the positive output end of the single-phase uncontrolled rectifier circuit, the negative output end of the single-phase uncontrolled rectifier circuit, the positive input end of the three-phase inverter circuit, and the negative input end of the three-phase inverter circuit; an insulating layer is arranged between the positive output end of the single-phase uncontrolled rectifier circuit and the negative output end of the single-phase uncontrolled rectifier circuit; and an insulating layer is arranged between the positive input end of the three-phase inverter circuit and the negative input end of the three-phase inverter circuit.

9. The multifunctional integrated converter module according to claim 5, characterized in that: A stacking process is adopted between the positive output end of the three-phase uncontrolled rectifier circuit and the negative output end of the three-phase uncontrolled rectifier circuit, and an insulating layer is arranged between the positive output end of the three-phase uncontrolled rectifier circuit and the negative output end of the three-phase uncontrolled rectifier circuit.

10. The multifunctional integrated converter module according to claim 3 or claim 4 or claim 5, characterized in that: The first diode, the second diode, the third diode, the fourth diode, the fifth diode, the sixth diode, the seventh diode, the eighth diode, the ninth diode, the tenth diode, the first power device, the second power device, the third power device, the fourth power device, the fifth power device, and the sixth power device are all packaged using the same standard.

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