CN115037132A - Converter module and converter - Google Patents

Abstract

The embodiment of the application provides a converter module and converter, includes: any two chopping modules are connected in parallel, and each chopping module is used for outputting chopping data; any two inversion modules are connected in parallel, each inversion module is used for outputting inversion data, and each inversion module is connected with each chopping module in parallel; and the control circuit is electrically connected with each inversion module and each chopping module and is used for controlling the working state of each inversion module and the working state of each chopping module.

Description

Converter module and converter

Technical Field

The present application relates to the field of power technology, and relates to, but is not limited to, a converter module and a converter.

Background

With the rapid development of domestic high-speed railways, the rail transit industry also faces the blowout period of high-speed development. Along with the rapid development of the rail transit industry, the related technical level of rail transit is further improved. The design level of the electric railway is improved in a breakthrough manner from the track construction to the arrangement of the electrified railway line to the vehicle design level. In the design of rail transit vehicles, the design of a traction converter power module plays a very critical role in the overall level of the vehicles, technical breakthrough innovation is achieved in the core field, and the traction converter power module plays a crucial role in assisting the development of the rail transit industry in China, but the existing power module has a single function, can only realize one of functions of rectification, inversion or chopping, and is not flexible to use.

Disclosure of Invention

In view of some or all of the above technical problems in the prior art, the present application provides a converter module and a converter.

The application provides a converter module, includes:

any two chopping modules are connected in parallel, and each chopping module is used for outputting chopping data;

any two inversion modules are connected in parallel, each inversion module is used for outputting inversion data, and each inversion module is connected with each chopping module in parallel;

and the control circuit is electrically connected with each inversion module and each chopping module and is used for controlling the working state of each inversion module and the working state of each chopping module.

In some embodiments, each chopping module includes: first IGBT device, each contravariant module includes: a second IGBT device, the converter module further comprising:

the detection circuit is electrically connected with each first IGBT device, each second IGBT device, the control circuit and the power supply circuit, is used for detecting whether each first IGBT device and each second IGBT device are abnormal or not, and generates an abnormal signal and sends the abnormal signal to the control circuit when detecting that the first IGBT device and/or the second IGBT device are abnormal;

and the control circuit is also used for controlling the chopping module corresponding to the abnormal first IGBT device and/or the inversion module corresponding to the abnormal second IGBT device to stop working according to the abnormal signal.

In some embodiments, the converter module further comprises:

the chopping modules and the inversion modules are arranged on the radiator;

the low-inductance bus bar is arranged above each chopping module and each inversion module and is electrically connected with each chopping module and each inversion module;

and the alternating current copper bar is in a plate shape, is integrally manufactured, is arranged above the low-induction busbar, is electrically connected with each inversion module, and is used for outputting inversion data.

In some embodiments, the control circuit comprises:

the pulse distribution board is used for sending a control signal, and the control signal is used for controlling the work of the target chopping module and/or the target inversion module;

the chopping driving board is electrically connected with the pulse distribution board, is electrically connected with each chopping module, and is used for generating a first driving signal based on the control signal and sending the first driving signal to the target chopping module under the condition of receiving the control signal so as to control the target chopping module to work;

and the inversion driving board is electrically connected with the pulse distribution board, is electrically connected with each inversion module, and is used for generating a second driving signal based on the control signal under the condition of receiving the control signal and sending the second driving signal to the target inversion module so as to control the target inversion module to work.

In some embodiments, the control circuit further comprises:

and the capacitor is electrically connected with each inversion module and used for receiving inversion data output by each inversion module, the capacitor is arranged above the alternating current copper bar, and the inversion driving plate is arranged on two sides of the capacitor.

In some embodiments, the control circuit further comprises:

and the power supply module is electrically connected with the pulse driving board, the chopping driving board and the pulse distribution board, and is used for providing a first voltage to the inversion driving board and the chopping driving board and also used for providing a second voltage to the pulse distribution board.

In some embodiments, the inverter driving board includes a mother board electrically connected to the pulse distribution board and at least two daughter boards, each of which is electrically connected to one of the inverter modules.

In some embodiments, the converter module further comprises:

the control box is arranged above the capacitor, the power module, the pulse distribution plate and the chopping drive plate are arranged inside the control box, and the inversion drive plate is arranged outside the control box.

In some embodiments, the heat sink comprises: the heat pipe is L-shaped and used for dissipating heat through a fluid medium.

The embodiment of the application provides a current transformer, which comprises any one of the current transformer modules.

The application provides a pair of converter module and converter, the converter module includes: at least two chopper modules, two at least contravariant modules and control circuit control each chopper module and each operating condition of contravariant module through control circuit, can provide chopper data output and contravariant data output, controls each chopper module and each operating condition of contravariant module through control circuit moreover, can realize the multiple combination of chopper module and contravariant module, uses more in a flexible way.

Drawings

The present application will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a connection structure of two chopper modules and two inverter modules according to an embodiment of the present disclosure;

fig. 2 is a schematic perspective view of a converter module according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of a split structure of a converter module according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a low-inductance busbar according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of an ac copper bar provided in the embodiment of the present application;

fig. 6 is a schematic structural diagram of a control circuit according to an embodiment of the present disclosure.

Illustration of the drawings: 1. a heat sink; 2, detecting a plate; 3. chopping modules, 4, chopping copper bars; 5. a low inductance busbar; 6. a capacitor; 7. a control box; 8. chopping driving plates; 9. a pulse distribution plate; 10. a power supply module; 11. an inverter drive board; 12. alternating current copper bars; 13. fixing a discharge resistor; 14. an inversion module; 51. an insulating strip structure.

Detailed Description

The following detailed description will be provided with reference to the accompanying drawings and embodiments, so that how to apply the technical means to solve the technical problems and achieve the corresponding technical effects can be fully understood and implemented. The embodiments and various features in the embodiments of the present application can be combined with each other without conflict, and the formed technical solutions are all within the scope of protection of the present application.

The application provides a converter module which comprises at least two chopping modules, at least two inversion modules and a control circuit, wherein any two chopping modules are connected in parallel, and each chopping module is used for outputting chopping data; any two inversion modules are connected in parallel, each inversion module is used for outputting inversion data, and each inversion module is connected with each chopping module in parallel; and the control circuit is electrically connected with each inversion module and each chopping module and is used for controlling the working state of each inversion module and the working state of each chopping module.

In the embodiment of the present application, the at least two chopping modules may be two or three. The at least two inversion modules can be two or three. The chopping module is used for outputting chopping data, and the inversion module is used for outputting inversion data. The chopping data can be chopping phase current, the inversion data can be three-phase inversion output current, and in the embodiment of the application, each chopping module and each inversion module are connected to the same group of bus. Any two modules in each chopping module and each inversion module are connected in parallel.

Exemplarily, the number of the at least two chopping modules is 2, the number of the at least two inverter modules is 2, fig. 1 is a schematic diagram of a connection structure of the two chopping modules and the two inverter modules provided in an embodiment of the present application, as shown in fig. 1, each chopping module includes a first IGBT device, and each inverter module includes: and a second IGBT device. The insulated gate bipolar transistor used for the chopping function of the first IGBT device can be an HVIGBT packaging device. The chopper module may include 2 HVIGBT packaged devices, two HVIGBT packaged devices connected in series, and an output port (CH1 or CH2) connected between the two HVIGBT packaged devices.

The inverter module can include 6 novel IGBT devices, and the novel IGBT devices are packaged by XHP2, and the rated voltage 3300V, rated current 550A of every novel IGBT device. In the contravariant module, two IGBT devices are established ties, are a series circuit, and 6 IGBT devices have 3 series circuits, and every series circuit is connected with the generating line, and 3 series circuits are parallelly connected respectively. An output port is connected between the two IGBT devices, and each series circuit outputs one phase. In the embodiment of the application, two inversion modules are connected in parallel, one inversion module outputs (U1, V1 and W1) and the other inversion module outputs (U2, V2 and W2).

In the embodiment of the present application, the control circuit is connected to each chopper module and each inverter module to support the above example, the control circuit is connected to the first IGBT device in each chopper module, and the control circuit is connected to the second IGBT device in each inverter module. In the embodiment of the application, the control circuit can control the working state of the first IGBT device in each chopping module so as to control each chopping module, and the control circuit can control the working state of the second IGBT device in each inversion module so as to control the working device of each inversion module.

In some embodiments, the control circuit may include: the pulse distribution board is used for sending a control signal, and the control signal is used for controlling the work of the target chopping module and/or the target inversion module; the chopping driving board is electrically connected with the pulse distribution board, is electrically connected with each chopping module, and is used for generating a first driving signal based on the control signal and sending the first driving signal to the target chopping module under the condition of receiving the control signal so as to control the target chopping module to work; and the inversion driving board is electrically connected with the pulse distribution board, is electrically connected with each inversion module, and is used for generating a second driving signal based on the control signal and sending the second driving signal to the target inversion module under the condition of receiving the control signal so as to control the target inversion module to work.

In the embodiment of the application, when the inverter module is required to be used, the control circuit can control one inverter module to work; when the two inversion modules are required to be used, the control circuit can control the two inversion modules to work, and when the two inversion modules and the chopping module are required to be used, the control circuit can control the two inversion modules and the chopping module to work. In the embodiment of the application, the control circuit can provide various combinations, and the flexibility of the converter module is improved.

In the embodiment of the application, the control circuit can generate the control signal, generate the corresponding driving voltage according to the control signal, and control the switching of the first IGBT device and/or the second IGBT device through the driving voltage, so that the control of each chopping module and/or each inversion module is realized.

The application provides a converter module includes: at least two chopper modules, two at least contravariant modules and control circuit control each chopper module and each operating condition of contravariant module through control circuit, can provide chopper data output and contravariant data output, controls each chopper module and each operating condition of contravariant module through control circuit moreover, can realize the multiple combination of chopper module and contravariant module, uses more in a flexible way.

In some embodiments, the converter module further comprises: and the detection circuit is electrically connected with each first IGBT device and each second IGBT device, is electrically connected with the control circuit, is used for detecting whether each first IGBT device and each second IGBT device are abnormal or not, and generates an abnormal signal to send to the control circuit when detecting that the first IGBT device and/or the second IGBT device are abnormal. And the control circuit is also used for controlling the chopping module corresponding to the abnormal first IGBT device and/or the inversion module corresponding to the abnormal second IGBT device to stop working according to the abnormal signal.

In the embodiment of the present application, with reference to fig. 1, the detection circuit may be a detection board, which may detect an operating state of the first IGBT device and/or the second IGBT device, may detect a current passing state of the first IGBT device and/or the second IGBT device, and determine whether the first IGBT device and/or the second IGBT device are abnormal.

In the embodiment of the application, the detection circuit sends the abnormal signal to the control circuit, and the control circuit can determine the target IGBT device according to the abnormal signal, so as to control the inversion module corresponding to the target IGBT device to stop working.

The converter module that this application embodiment provided can stop chopper module or contravariant module work when having the anomaly through increasing detection circuitry, can protect the load.

In some embodiments, fig. 2 is a schematic perspective structure diagram of a current transformer module provided in an embodiment of the present application, and fig. 3 is a schematic disassembly structure diagram of the current transformer module provided in the embodiment of the present application, as shown in fig. 2 to fig. 3, the current transformer module further includes: the radiator 1, the low-inductance busbar 5 and the alternating-current copper bar 12;

each chopper module 3 and each inverter module 14 are disposed on the heat sink 1;

in accordance with the above example, the two chopper modules 3 are symmetrically disposed on the heat sink 1, and the two inverter modules 14 are symmetrically disposed on the heat sink 1. In the embodiment of the present application, the heat sink 1 includes: the heat pipe is L-shaped and used for dissipating heat through a fluid medium. The fluid medium is air, and the radiator adopts walking air cooling. The L-shaped heat pipe straight heat pipe can store more heat dissipation working media, so that the heat dissipation efficiency is higher. The radiator adopts a shape-walking air-cooling design, and does not need a special radiating air duct and a ventilator. The heat pipe part of the radiator 1 is positioned outside the converter cabinet body, and heat is radiated by running wind in the running process of the vehicle.

The low-inductance busbar 5 is arranged above each chopping module 3 and each inversion module 14, and the low-inductance busbar 5 is electrically connected with each chopping module 3 and each inversion module 14.

Fig. 4 is a schematic structural diagram of a low-inductance busbar according to an embodiment of the present application, and as shown in fig. 4, a low-inductance busbar 5 is integrally designed, and the low-inductance busbar 5 determines electrical interface positions with the chopper modules 3 and the inverter modules 14 according to positions of the chopper modules 3 and the inverter modules 14. In some embodiments, the location of the interface electrically connected to the capacitor 6 is also determined based on the location of the capacitor 6. In the embodiment of the application, low-inductance busbar 5 makes the electrical connection of low stray inductance value formed between inverter module 14, chopper module 3 and capacitor 6, and when satisfying lower loop stray inductance, realizes reliable main circuit electrical connection, and in order to satisfy the electric clearance and creepage distance between just, the negative pole of novel IGBT device, the design has insulating strip structure 51 on the low-inductance busbar.

And the alternating-current copper bar 12 is in a plate shape and integrally made, is arranged above the low-inductance busbar 5, is electrically connected with each inversion module 14, and is used for outputting inversion data.

In this application embodiment, exchange copper bar 12 and also adopt the integration to make, fig. 5 is the structural schematic diagram of an exchange copper bar that this application embodiment provided, as shown in fig. 5, exchange copper bar 12 and make through the integration, promoted the mechanical strength of converter module, and improved the integrated level of design moreover, avoid the condition of mistake appearing in the assembling process, and simultaneously, the design of integration exchanges copper bar has promoted the electrical insulation performance between the looks exchange bus. In the embodiment of the present application, the ac copper bar 12 is used as an output copper bus of the converter.

The converter module that this application embodiment provided, each chopping module 3, each contravariant module 14 set up in on the radiator 1, can dispel the heat to each chopping module 3, each contravariant module 14, arrange 5 through setting up low inductance and can make each chopping module 3 and each contravariant module 14 electrical connection reliable. The alternating current copper bar 12 is integrally manufactured, so that the mechanical strength of the converter can be improved.

With continued reference to fig. 2-3, in some embodiments, the control circuit includes: fig. 6 is a schematic structural diagram of a control circuit provided in an embodiment of the present application, and as shown in fig. 6, the pulse distribution plate 9 (a transmission control unit in the same figure) is configured to receive a control signal and send out the control signal, where the control signal is used to control the target chopper module 3 and/or the target inverter module 14 to operate; the chopping driving board 8 is electrically connected with the pulse distribution board 9, is electrically connected with each chopping module 3, and is configured to generate a first driving signal based on the control signal and send the first driving signal to the target chopping module 3 to control the target chopping module 3 to operate, when the control signal is received; the inversion driving board 11 is electrically connected to the pulse distribution board 9 and each inversion module 14, and is configured to generate a second driving signal based on the control signal and send the second driving signal to the target inversion module 14 to control the target inversion module 14 to operate when receiving the control signal.

In the embodiment of the application, the control signal can be a PWM control signal, the chopping drive board 8 can be connected with the chopping module 3 through the pickup board 2, and the inversion drive board 11 is connected with the inversion module 14 through the pickup board 2. In the embodiment of the present application, the pulse distribution board 9 may transmit a control signal to the target chopper module 3 and/or the target inverter module 14. The pulse distribution board 9 can be connected with the chopping drive board 8 and the inversion drive board 11 through optical fibers.

In some embodiments, the chopper driver board is connected to the first IGBT device in each chopper module through a detection circuit, and the inverter driver board is connected to the second IGBT device in each inverter module through a detection circuit, as shown in fig. 6, the detection circuit includes: on pickup plate a1, under pickup plate a1, on pickup plate B1, under pickup plate B1, on pickup plate C1, under pickup plate C1.

In some embodiments, with continued reference to fig. 2-3, the control circuit further comprises: the capacitor 6 is electrically connected with each inversion module 14 and used for receiving inversion data output by each inversion module, the capacitor 6 is arranged above the alternating current copper bar 12, and the inversion driving plate 11 is arranged on two sides of the capacitor 6. The capacitor 6 may be a support capacitor, the capacitor 6 is vertically fixed above the ac copper bar 12, and the capacitor 6 is electrically connected to the low inductance bus bar 5. The capacitor 6 is used as an energy storage unit of a middle direct current link of the main circuit and provides direct current filtering and overvoltage absorption functions at the same time. The novel IGBT device can be applied to higher switching frequency, and technical parameters under the condition of high switching frequency are considered in the model selection design of the power capacitor. In the embodiment of the application, the equivalent series inductance of the capacitor is lower than 50nH, and the equivalent series resistance is less than 0.1m omega.

In some embodiments, with continued reference to fig. 6, the control circuit further comprises: and the power supply module 10 is electrically connected with the inverter driving board 11, the chopping driving board 8 and the pulse distribution board 9, and is used for providing a first voltage to the inverter driving board 11 and the chopping driving board 8 and also used for providing a second voltage to the pulse distribution board 9.

In the embodiment of the application, the input of the power supply module is supplied with DC110V power through an aviation circular plug, a first voltage is output for the inverter driving board and the chopper driving board, the first voltage can be DC15V, and a second voltage is output for supplying power to the pulse distribution board. The control power supply module has protection function units such as surge prevention, undervoltage protection, overvoltage blocking and the like, and has enough design margin to ensure the power supply of the pulse distribution board for input and output stability under abnormal conditions such as short-time overload and the like, and the second voltage can be DC 15V.

In some embodiments, the inverter driving board 11 includes a mother board electrically connected to the pulse distribution board and at least two daughter boards, each electrically connected to one of the inverter modules 14. By adopting the design of the mother-son board, different functional partitions can be realized, the product expansion and maintenance are convenient, and meanwhile, the product has high-frequency application conditions.

In some embodiments, the converter module further includes a control box 7, the control box 7 is disposed above the capacitor 6, wherein the power module 10, the pulse distribution board 9, and the chopper driving board 8 are disposed inside the control box 9, and the inverter driving board 11 is disposed outside the control box 7.

In the embodiment of the application, the control box 7 can be an explosion-proof box body, and through the explosion-proof box body, the influence on other devices caused by the combustion or explosion of the power module 10, the pulse distribution plate 9 and the chopping drive plate 8 can be avoided.

In some embodiments, the converter further comprises a chopping copper bar 4, and the chopping copper bar is connected with the chopping module and used for outputting chopping data.

In some embodiments, the converter further comprises a fixed discharge resistor 13 connected to the capacitor 6 for discharging the capacitor.

Based on the foregoing embodiments, the embodiments of the present application provide a converter module, and an inverter loop uses 6 novel IGBT devices to provide two independent three-phase inverter outputs. The 2 HVIGBT packaging devices are used as chopper loops and provide two independent chopper phase outputs. The power supply module converts the 110V voltage to ± 15V voltage for supplying power to the driving unit (the inverter driving board and the chopper driving board as in the above-described embodiment). A transmission control unit (DCU) (the same as the pulse distribution board in the above embodiment) sends a PWM control signal to a driving unit, and the driving unit generates a driving voltage according to the control signal to control the switching of IGBT devices (including a first IGBT device and a second IGBT device); when the IGBT device breaks down, a detection circuit (the same as the detection circuit in the embodiment) of the driving unit detects an abnormal signal and then blocks the IGBT device, and meanwhile fault information is fed back to a transmission control unit (DCU).

In the embodiment of the application, the radiator adopts the technology of the L-shaped heat pipe and the temperature equalizing pipe, and the L-shaped heat pipe can store more radiating working media than a straight heat pipe, so that the heat radiating efficiency is higher. The radiator adopts a shape-walking air-cooling design, and does not need a special radiating air duct and a ventilator. The heat pipe part of the radiator is positioned outside the traction converter cabinet body, and heat is radiated by running wind in the running process of the vehicle. As a bottom layer structure of the power module, an inverter module and a chopper module are arranged on the upper surface of a radiator, and the radiator is used for radiating heat of an IGBT device; and meanwhile, the upper part component is assembled and fixed above the radiator through the support column structure.

The two inversion modules and the two chopping modules form two paths of three-phase inversion outputs and two paths of chopping outputs. Compared with the traditional three-phase inverter, the design is based on the characteristic of miniaturization of novel devices, one more independent three-phase inverter output loop can be formed, and the load port output by the inverter is expanded.

The upper layers of the two inversion modules and the two chopping modules are low-inductance busbars which adopt an integrated design and match the installation requirements of the two inversion modules and the two chopping modules. The low-inductance busbar is electrically connected with the intermediate direct current reflux, the capacitor, the chopping device and the inversion module to form low stray inductance, so that the low loop stray inductance is met, and the integrated reliable main circuit is electrically connected. In order to meet the electric clearance and creepage distance between the positive electrode and the negative electrode of the novel IGBT device, an insulating strip structure is designed on the low-inductance busbar.

The alternating-current copper bar adopts an integrated structure design, and compared with the independent design of each phase of the traditional copper bar, the integrated copper bar not only improves the mechanical strength, but also improves the design integration level, and avoids the error occurrence in the assembling process. Meanwhile, the electrical insulation performance between the alternating current buses of all phases is improved through the integrated design.

A capacitor is arranged above the alternating current copper bar and serves as an energy storage unit of a direct current link in the middle of a main circuit, and meanwhile, the direct current filtering and overvoltage absorbing functions are provided. The inversion module can be applied to higher switching frequency, and technical parameters under the condition of high switching frequency are considered in the model selection design of the power capacitor. Table is a parameter comparison table of the novel capacitor provided in the embodiment of the present application and the conventional capacitor, and as shown in table 1, the equivalent luminance inductance of the novel capacitor provided in the embodiment of the present application is less than 50 nH. The equivalent series resistance is less than 0.1m omega.

TABLE 1 comparison of capacitor parameters

Capacitor type	Equivalent series inductance ESL	Equivalent series resistance ESR
			Novel capacitor	≤50nH	≤0.1mΩ
Conventional capacitor	≤100nH	≤0.3mΩ

The capacitor both sides are placed to the contravariant drive plate, and the contravariant drive plate adopts the mother and daughter board design to realize different function partitions, the product extension and the maintenance of being convenient for make the product possess the high frequency application condition simultaneously.

The chopping drive board is arranged in the control box and used for controlling the on-off and protection of the chopping IGBT device, ensuring that the device works in a SOA (service oriented architecture) in a safe working area, and having a protection function of safely turning off abnormal working conditions such as overcurrent and short circuit.

The pulse distribution board is positioned in the control box and is mainly used for receiving instructions sent by an external DCU and feeding back fault signals and module states to the DCU. The pulse distribution board processes the PWM control signal, sends an optical pulse signal to the driving board and receives a state signal fed back by the driving board. The pulse distribution board adopts a laminated design to support 16 paths of output, and more than 2 paths of channels are reserved simultaneously, so that the subsequent expansion and use are facilitated.

The control power supply (like the power supply module in the above embodiment) is located inside the control box, the input provides DC110V power through the aviation plug, and the output DC15V is used to power the IGBT driver board. The control power supply module has protection functional units such as surge prevention, undervoltage protection, overvoltage blocking and the like, has enough design allowance, and ensures the stability of input and output under abnormal conditions such as short-time overload and the like.

The converter module provided by the embodiment of the application adopts the IGBT device to optimize the welding process of the main power terminal, and has higher power cycle times, longer service life and higher power density aiming at the problem of device aging caused by power cycle in long-term application.

The converter module that this application embodiment provided, converter module adopt highly integrated design, have integrateed key parts such as heat pipe radiator, semiconductor power device, low-inductance composite busbar, condenser, drive unit, power module and the control unit, have carried out innovative design and technological preferred to key parts such as condenser, drive unit, pulse distribution board simultaneously.

According to the converter module provided by the embodiment of the application, the control circuit adopts the unit group and modular design, and is divided into the power module, the control unit and the driving unit, so that the integrated design of the control circuit is facilitated, and reasonable configuration is carried out according to the actual demand quantity. When a fault occurs, the corresponding fault unit (module) is isolated and replaced, so that the fault is quickly eliminated and recovered for use, and the maintainability of the product is improved.

In the embodiment of the application, the separation design of electromagnetic component interaction is realized in space, and an orthogonal wiring process is adopted to optimize EMC performance.

In the embodiment of the application, the design of the walking air-cooled gravity heat pipe radiator is adopted, the maintenance is avoided in daily application, a forced ventilation cooling system is not required to be specially designed, and structures such as a fan and an air duct are omitted, so that the system is simpler, and the design cost is reduced.

The converter module that this application embodiment provided uses novel IGBT device, and more traditional IGBT device all has the advantage in the aspect of system loss, life, power density, extension design, small-size lightweight design etc.. The converter module is high in integration level, and can be better miniaturized and light. The structural design simplifies the assembly relation, is favorable for improving the assembly efficiency of products, and improves the convenience of use and maintenance. The standard functional units of the converter module are a 2-path three-phase inverter and a 2-path chopping phase unit, which can be flexibly combined, for example, the 2-path three-phase inverter can be connected in parallel to drive a high-power motor (in a shaft control mode) and can also respectively drive two low-power motors (in a frame mode). Compared with the application of the IGBT device packaged in the traditional way, the novel IGBT device improves the power density and the design capacity by more than 40 percent. Meanwhile, the peripheral circuit structure and the model selection design are optimized for the novel IGBT device, the system loss can be reduced by more than 10%, and the system efficiency and the application reliability are improved.

The embodiment of the application provides a current transformer, and the current transformer module is any one of the current transformers.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or in other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all functional units in the embodiments of the present application may be integrated into one second processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.

Claims (10)

1. A current transformer module, comprising:

any two chopping modules are connected in parallel, and each chopping module is used for outputting chopping data;

any two inversion modules are connected in parallel, each inversion module is used for outputting inversion data, and each inversion module is connected with each chopping module in parallel;

and the control circuit is electrically connected with each inversion module and each chopping module and is used for controlling the working state of each inversion module and the working state of each chopping module.

2. The converter module of claim 1, wherein each chopper module comprises: first IGBT device, each contravariant module includes: a second IGBT device, the converter module further comprising:

the detection circuit is electrically connected with each first IGBT device, each second IGBT device, the control circuit and the detection circuit and is used for detecting whether each first IGBT device and each second IGBT device are abnormal or not and generating an abnormal signal and sending the abnormal signal to the control circuit when the first IGBT device and/or the second IGBT device are detected to be abnormal;

and the control circuit is also used for controlling the chopping module corresponding to the abnormal first IGBT device and/or the inversion module corresponding to the abnormal second IGBT device to stop working according to the abnormal signal.

3. The converter module of claim 1, further comprising:

the chopping modules and the inversion modules are arranged on the radiator;

the low-inductance bus bar is arranged above each chopping module and each inversion module and is electrically connected with each chopping module and each inversion module;

and the alternating current copper bar is in a plate shape, is integrally manufactured, is arranged above the low-induction busbar, is electrically connected with each inversion module, and is used for outputting inversion data.

4. The converter module of claim 3, wherein the control circuit comprises:

the pulse distribution board is used for sending a control signal, and the control signal is used for controlling the work of the target chopping module and/or the target inversion module;

the chopping driving board is electrically connected with the pulse distribution board, is electrically connected with each chopping module, and is used for generating a first driving signal based on the control signal and sending the first driving signal to the target chopping module under the condition of receiving the control signal so as to control the target chopping module to work;

and the inversion driving board is electrically connected with the pulse distribution board, is electrically connected with each inversion module, and is used for generating a second driving signal based on the control signal under the condition of receiving the control signal and sending the second driving signal to the target inversion module so as to control the target inversion module to work.

5. The converter module of claim 4, wherein the control circuit further comprises:

and the capacitor is electrically connected with each inversion module and used for receiving inversion data output by each inversion module, the capacitor is arranged above the alternating current copper bar, and the inversion driving plate is arranged on two sides of the capacitor.

6. The converter module of claim 5, wherein the control circuit further comprises:

and the power supply module is electrically connected with the pulse driving board, the chopping driving board and the pulse distribution board, and is used for providing a first voltage to the inversion driving board and the chopping driving board and also used for providing a second voltage to the pulse distribution board.

7. The inverter module of claim 5 wherein said inverter driver board includes a motherboard and at least two daughter boards, said motherboard electrically connected to said pulse distribution board and each daughter board electrically connected to one of said inverter modules.

8. The converter module of claim 6, further comprising:

the control box is arranged above the capacitor, the power module, the pulse distribution plate and the chopping drive plate are arranged inside the control box, and the inversion drive plate is arranged outside the control box.

9. The converter module of claim 3, wherein the heat sink comprises: the heat pipe is L-shaped and used for dissipating heat through a fluid medium.

10. A current transformer, comprising: the current transformer module of any one of claims 1 to 9.

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