CN114094842B - Converter module - Google Patents
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- CN114094842B CN114094842B CN202010767494.1A CN202010767494A CN114094842B CN 114094842 B CN114094842 B CN 114094842B CN 202010767494 A CN202010767494 A CN 202010767494A CN 114094842 B CN114094842 B CN 114094842B
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- converter module
- unit
- phase inverter
- direct current
- current input
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- 230000005540 biological transmission Effects 0.000 claims abstract description 37
- 239000003990 capacitor Substances 0.000 claims abstract description 35
- 238000007599 discharging Methods 0.000 claims abstract description 7
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- 229910010271 silicon carbide Inorganic materials 0.000 claims description 25
- 239000002131 composite material Substances 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 238000004806 packaging method and process Methods 0.000 claims description 7
- 239000011165 3D composite Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
Abstract
The application discloses a converter module, which comprises a transmission control unit, a driving unit, a three-phase inverter, a chopping unit, a discharge resistor, a supporting capacitor, a radiator and a power supply; the support capacitor is used for filtering direct current input by the direct current input end of the converter module; the discharging resistor is used for releasing the electric energy of the supporting capacitor when the converter module is stopped; the power supply is used for supplying power to the transmission control unit and the driving unit; the transmission control unit is used for outputting a control signal to the driving unit; the driving unit is used for controlling the switching state of each switching tube in the three-phase inverter according to the control signal so as to enable the three-phase inverter to invert the direct current input by the direct current input end into alternating current; and controlling the switching state of a switching tube in the chopping unit according to the control signal so as to enable the chopping unit to carry out chopping treatment on the direct current input by the direct current input end. The converter module can independently operate to realize three-phase inversion and chopping functions, and has higher safety.
Description
Technical Field
The application relates to the technical field of converters, in particular to a converter module.
Background
With the continuous development of rail transit technology, intelligent, green, efficient, safe and convenient railway mobile equipment has become a development direction and strategic goal of rail transit mobile equipment. As a key device therein, a high performance, light weight, and small volume of the converter module are becoming their research directions. The converter module with superior performance, light weight and small volume can certainly lay an important foundation for the development of a more efficient converter, thereby further promoting the development of rail transit. Therefore, how to provide a high-performance converter module has become a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The purpose of this application is to provide a converter module, can independently operate and realize three-phase contravariant and chopper function to the security is higher.
In order to solve the above technical problem, the present application provides a converter module, including:
the device comprises a transmission control unit, a driving unit, a three-phase inverter, a chopping unit, a discharge resistor, a supporting capacitor, a radiator and a power supply, wherein the transmission control unit is connected with the three-phase inverter;
the supporting capacitor is used for filtering direct current input by the direct current input end of the converter module;
the discharging resistor is used for releasing the electric energy of the supporting capacitor when the converter module is stopped;
the power supply is used for supplying power to the transmission control unit and the driving unit;
the transmission control unit is used for outputting a control signal to the driving unit;
the driving unit is used for controlling the switching state of each switching tube in the three-phase inverter according to the control signal so as to enable the three-phase inverter to invert the direct current input by the direct current input end into alternating current; and controlling the switching state of a switching tube in the chopping unit according to the control signal so as to enable the chopping unit to carry out chopping treatment on the direct current input by the direct current input end.
Optionally, the three-phase inverter includes six silicon carbide MOS transistors, six silicon carbide MOS transistors form three bridge arms of the three-phase inverter, and each bridge arm includes two silicon carbide MOS transistors.
Optionally, two silicon carbide MOS tubes of each bridge arm of the three-phase inverter are packaged in a packaging mode of LV100 or XHP 2.
Optionally, the chopping unit includes:
IGBTs and diodes; the grid electrode of the IGBT is connected with the driving unit, the collector electrode of the IGBT is connected with the positive electrode of the direct current input end of the converter module, the emitter electrode of the IGBT is connected with the cathode of the diode, and the energy release assembly, and the anode of the diode is connected with the negative electrode of the direct current input end of the converter module.
Optionally, the IGBT is packaged by using a packaging mode of HVIGBT or IHV.
Optionally, the converter module includes two three-phase inverters and two chopper units.
Optionally, the heat sink is a 3D composite phase change heat sink.
Optionally, the converter module is further provided with an air duct assembly, the radiator is disposed in the air duct assembly, and an air inlet of the air duct assembly can be connected with an external air inlet channel.
Optionally, the air inlet of the air duct component is provided with a sealing rubber ring.
Optionally, the power supply is connected with 110V of direct current, and outputs 15V of direct current to the driving unit, and outputs 24V of direct current to the transmission control unit.
Optionally, the driving unit is connected with the transmission control unit through an optical fiber.
Optionally, the driving unit includes a MOS transistor driving board and an IGBT driving board.
Optionally, the direct current input end of the converter module is connected with a composite busbar, and the chopper unit and the three-phase inverter are both connected with the composite busbar.
Optionally, the three-phase inverter is connected with a conductive copper bar, and the conductive copper bar is used as an alternating current output end of the converter module and an output end of the chopper unit.
Optionally, the support capacitor is a dry, shell-less metallized safety film capacitor.
Optionally, the converter module includes a first control circuit layer, a second main circuit layer and a third structural layer from top to bottom; the radiator is arranged in the air duct assembly and is positioned on the third structural layer; the three-phase inverter, the chopping unit, the composite busbar, the discharge resistor and the supporting capacitor are positioned on the second circuit layer; the power supply, the transmission control unit, the MOS tube driving plate and the IGBT driving plate are positioned on the first control circuit layer.
The current transformer module provided by the application comprises: the device comprises a transmission control unit, a driving unit, a three-phase inverter, a chopping unit, a discharge resistor, a supporting capacitor, a radiator and a power supply, wherein the transmission control unit is connected with the three-phase inverter; the supporting capacitor is used for filtering direct current input by the direct current input end of the converter module; the discharging resistor is used for releasing the electric energy of the supporting capacitor when the converter module is stopped; the power supply is used for supplying power to the transmission control unit and the driving unit; the transmission control unit is used for outputting a control signal to the driving unit; the driving unit is used for controlling the switching state of each switching tube in the three-phase inverter according to the control signal so as to enable the three-phase inverter to invert the direct current input by the direct current input end into alternating current; and controlling the switching state of a switching tube in the chopping unit according to the control signal so as to enable the chopping unit to carry out chopping treatment on the direct current input by the direct current input end.
Therefore, the current transformer module integrates the transmission control unit, the driving unit, the three-phase inverter, the chopping unit, the discharge resistor, the supporting capacitor and the like, and achieves miniaturization and integration of the current transformer module. The converter module is integrated with a transmission control unit and the like, so that the converter module can independently operate, and three-phase inversion and chopping functions are realized. In addition, as the current transformer module is integrated with the discharge resistor, when the current transformer module is stopped, the residual electric energy of the supporting capacitor can be slowly released through the discharge resistor, so that the occurrence of electric shock accidents is prevented, and the safety of the current transformer module is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly explain the drawings needed in the prior art and embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a current transformer module according to an embodiment of the present application;
fig. 2 is a schematic diagram of a converter module according to an embodiment of the present application;
fig. 3 is an overall schematic diagram of a current transformer module according to an embodiment of the present application;
fig. 4 is an exploded schematic diagram of a current transformer module according to an embodiment of the present application.
Detailed Description
The core of the application is to provide a converter module which can independently operate to realize three-phase inversion and chopping functions and has higher safety.
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
Referring to fig. 1, fig. 1 is a schematic diagram of a current transformer module according to an embodiment of the present application, and referring to fig. 1, the current transformer module includes:
a transmission control unit 10, a driving unit 20, a three-phase inverter 30, a chopper unit 40, a discharge resistor R, a support capacitor C, a heat sink 50, and a power supply 60;
the support capacitor C is used for filtering direct current input by the direct current input end of the converter module;
the discharging resistor R is used for releasing the electric energy of the supporting capacitor C when the converter module is stopped;
a power supply 60 for supplying power to the transmission control unit 10 and the driving unit 20;
a transmission control unit 10 for outputting a control signal to the driving unit 20;
a driving unit 20 for controlling the switching state of each switching tube in the three-phase inverter 30 according to the control signal, so that the three-phase inverter 30 inverts the direct current input from the direct current input end into alternating current; and controlling the switching state of the switching tube in the chopping unit 40 according to the control signal, so that the chopping unit 40 chops the direct current input by the direct current input end.
Specifically, the converter module provided in the present application is integrated with the power transmission control unit 10, the three-phase inverter 30, the chopper unit 40, the discharge resistor R, the support capacitor C, the heat sink 50, the driving unit 20, and the power supply 60.
As shown in fig. 2, the discharging resistor R and the supporting capacitor C are all connected in parallel between the positive and negative poles of the dc input end of the converter module. The support capacitor C serves as energy decoupling and dc filtering for three-phase inversion. In a specific embodiment, the supporting capacitor C is a dry type shell-free metallized safety film capacitor, so that the faults of oil leakage, metal shell deformation (such as bulge) and shell discharge and the like of the oil type capacitor can be avoided. The discharge resistor R is used to discharge the power of the support capacitor. When the converter is stopped, the discharging resistor R can slowly release the residual electric energy of the supporting capacitor C so as to prevent personnel from touching and electric shock.
The chopper unit 40 is connected to the dc input terminal of the converter module, and is configured to chop the dc input from the dc input terminal. In a specific embodiment, the chopping unit 40 includes an IGBT and a diode; the grid electrode of the IGBT is connected with the driving unit 20, the collector electrode of the IGBT is connected with the positive electrode of the direct current input end of the converter module, the emitter electrode of the IGBT is connected with the cathode of the diode, and the energy release component is connected with the anode of the diode. The energy release component can be a resistor or the like. When the voltage at the direct current input end of the converter module exceeds the rated value, the chopper unit 40 chops the voltage, and the energy release component releases some electric energy to reduce the voltage to the rated value. The IGBT can be packaged in a packaging mode of an HVIGBT or an IHV, namely, the HVIGBT or the IHV packaging type IGBT is adopted.
As shown in fig. 2, the switching tube S1 and the diode D1 form a path of chopping unit, and the switching tube S2 and the diode D2 form a path of chopping unit. CH1 and CH2 represent energy release components to which each chopper unit is connected, respectively.
The three-phase inverter 30 is connected to the dc input end of the converter module and the ac output end of the converter module, and is configured to invert the dc input from the dc input end into ac and output the ac.
In a specific embodiment, the three-phase inverter 30 includes six silicon carbide MOS transistors, and the six silicon carbide MOS transistors form three legs of the three-phase inverter, each leg including two silicon carbide MOS transistors.
Specifically, in this embodiment, each switching tube of the three-phase inverter is specifically a silicon carbide MOS tube, six silicon carbide MOS tubes form three bridge arms of the three-phase inverter, and each bridge arm includes two silicon carbide MOS tubes. Therefore, each switch tube of the three-phase inverter is set to be a silicon carbide MOS tube, so that the converter module is suitable for being applied under the condition of high switching frequency (more than 5 kHz), and the three-phase inverter has low loss and high energy conversion efficiency. The two silicon carbide MOS tubes of each bridge arm of the three-phase inverter can be packaged in a LV100 or HXP2 packaging mode, namely, the LV100 or XHP2 packaging type silicon carbide MOS tubes are adopted.
As shown in fig. 2, the switching transistors Q1 to Q6 represent six silicon carbide MOS transistors in the three-phase inverter 30. Switching tubes Q1 and Q2 constitute one arm of the three-phase inverter 30, switching tubes Q3 and Q4 constitute one arm of the three-phase inverter 30, and switching tubes Q5 and Q6 constitute one arm of the three-phase inverter 30.
For the inversion principle of the three-phase inverter and the chopping principle of the chopper circuit, the application is not repeated herein, and the existing related technology is referred to.
Furthermore, in a specific embodiment, the converter module comprises two three-phase inverters and two-way chopper units. The converter module comprises two three-phase inverters and two chopper units, so that the application of various circuit topologies such as dragging two motors by the two three-phase inverters 30 or dragging one motor after the two three-phase inverters 30 are connected in parallel can be realized.
As shown in fig. 2, the switching transistors Q1 to Q6 constitute one three-phase inverter 30, and the switching transistors Q7 to Q12 constitute the other three-phase inverter 30. The switching tube S1 and the diode D1 form one path of chopping unit 40, and the switching tube S2 and the diode D2 form the other path of chopping unit 40.
The transmission control unit 10 is used for controlling the converter module to work under working conditions such as traction, braking and the like. The transmission control unit 10 communicates with the driving unit 20, and sends a control signal to the driving unit 20, so that the driving unit 20 controls the switching state of each switching tube in the three-phase inverter 30, and the three-phase inverter 30 inverts the direct current input by the direct current input end into alternating current; and controlling the switching state of the switching tube in the chopping unit 40, so that the chopping unit 40 chops the direct current input by the direct current input end. In addition, the chopper unit 40 and the control ends of the switching tubes in the three-phase inverter 30, that is, the gate of the IGBT and the gate of the silicon carbide MOS tube are connected to a detection board, and the detection board is used for detecting voltages between the collector and the emitter of the IGBT and between the drain and the source of the silicon carbide MOS tube, and feeding back the detected voltages to the driving unit 20, so that the driving unit 20 feeds back the operating states of the IGBT and the silicon carbide MOS tube to the transmission control unit 10 in real time. The transmission control unit 10 further performs PWM pulse control according to the state of each switching tube, so as to block the PWM pulse when an abnormality occurs in the switching tube, and make the driving unit 20 turn off the corresponding switching tube, thereby protecting the device.
The driving unit 20 is used for controlling the switching on and off of each switching tube in the three-phase inverter and the chopper unit, and protecting each switching tube, so as to ensure that the device works in a safe working area. The drive unit supports applications with switching frequencies above 5 kHz.
In a specific embodiment, the driving unit 20 includes a MOS transistor driving board and an IGBT driving board. That is, the silicon carbide MOS transistor in the three-phase inverter 30 is driven by the MOS transistor driving plate, and the IGBT in the chopper unit 40 is driven by the IGBT driving plate. And the number of the MOS tube driving boards can be 3, and each MOS tube driving board controls two silicon carbide MOS tubes of one bridge arm of the three-phase inverter 30. Referring to fig. 2, for the case of two or more three-phase inverters 30, one MOS transistor driving board may be responsible for driving two silicon carbide MOS transistors of one leg in different three-phase inverters 30. The number of IGBT drive boards may be 1, responsible for controlling the IGBTs in the chopper unit 40. For the case where the number of the chopping units 40 is two or more, the IGBTs of each chopping unit 40 may have such an IGBT drive board control.
In addition, in a specific embodiment, the driving unit 20 and the transmission control unit 10 are connected through an optical fiber. The drive unit 20 communicates with the transmission control unit 10 by means of optical fiber communication.
The heat sink 50 is used for heat dissipation. In a specific embodiment, the radiator 50 is a 3D composite phase change radiator, that is, the radiator 50 adopts a 3D composite phase change technology, the internal cavity of the radiator is filled with a cooling medium, and the inside of the longitudinal fin is provided with a channel for the cooling medium to work. A large number of transverse fins are welded between the longitudinal fins, so that the heat dissipation area is increased, and the heat dissipation efficiency is improved.
Further, in a specific embodiment, the converter module is further provided with an air duct assembly, and the radiator 50 is disposed in the air duct assembly, and an air inlet of the air duct assembly may be connected to an external air inlet channel. The air duct assembly provides a channel for cooling air flow on the one hand and is used for bearing the whole converter module on the other hand, and is used as a mechanical installation interface of the converter module to install the converter module in a converter cabinet. In addition, the air inlet is provided with a sealing rubber ring so as to realize the sealing connection of the air inlet and the air inlet channel when the air inlet is connected with the air inlet channel.
Further, in a specific embodiment, the dc input end of the converter module is connected to the composite busbar, and the chopper unit 40 and the three-phase inverter 30 are both connected to the composite busbar, i.e. the low-inductance busbar, and the composite busbar is used as a dc busbar.
Further, in a specific embodiment, the three-phase inverter 30 is connected to a conductive copper bar, and the conductive copper bar is used as an ac output end of the converter module and an output end of the chopper unit 40, that is, the conductive copper bar is used as an output ac bus of the three-phase inverter 30 and an output end of the chopper unit 40.
In addition, a current sensor is further arranged at the direct current input end and the alternating current output end of the converter module, and the current input by the direct current input end and the current output by the alternating current output end are monitored through the current sensor.
Further, referring to fig. 3 and fig. 4, in a specific embodiment, the converter module includes, from top to bottom, a first control circuit layer, a second main circuit layer, and a third structural layer; the heat sink 50 is located at the third structural layer; the three-phase inverter 30, the chopping unit 40, the composite busbar, the discharge resistor R and the supporting capacitor C are positioned on the second main circuit layer; the power supply 60, the transmission control unit 10, the MOS tube driving board and the IGBT driving board are positioned on the first control circuit layer. In fig. 4, 1 denotes a radiator, 2 denotes a silicon carbide MOS transistor, 3 denotes a conductive copper bar, 4 denotes a current sensor, 5 denotes a composite busbar, 6 denotes a MOS transistor drive plate, 7 denotes a support capacitor, 8 denotes a power supply, 9 denotes a transmission control unit, 10 denotes an IGBT drive plate, 11 denotes an IGBT, and 12 denotes a discharge resistor. In the embodiment, all functional units of the converter module are arranged in layers, the division is clear, the assembly process and the difficulty are simplified, and the assembly efficiency of the product is improved.
In summary, the current transformer module provided by the application integrates the transmission control unit, the driving unit, the three-phase inverter, the chopper unit, the discharge resistor, the supporting capacitor and the like, thereby realizing miniaturization and integration of the current transformer module. The converter module is integrated with a transmission control unit and the like, so that the converter module can independently operate, and three-phase inversion and chopping functions are realized. In addition, as the current transformer module is integrated with the discharge resistor, when the current transformer module is stopped, the residual electric energy of the supporting capacitor can be slowly released through the discharge resistor, so that the occurrence of electric shock accidents is prevented, and the safety of the current transformer module is improved.
Because of the complexity of the case and the inability to list one to another, one skilled in the art will recognize that there may be many examples of embodiments that can be combined with practice under the basic principles of the embodiments provided herein, all of which are within the scope of the present application without undue inventive effort.
In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred.
The converter module provided by the present application is described in detail above. Specific examples are set forth herein to illustrate the principles and embodiments of the present application, and the description of the examples above is only intended to assist in understanding the methods of the present application and their core ideas. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
Claims (12)
1. A current transformer module, comprising:
the device comprises a transmission control unit, a driving unit, a three-phase inverter, a chopping unit, a discharge resistor, a supporting capacitor, a radiator and a power supply, wherein the transmission control unit is connected with the three-phase inverter;
the supporting capacitor is used for filtering direct current input by the direct current input end of the converter module;
the discharging resistor is used for releasing the electric energy of the supporting capacitor when the converter module is stopped;
the power supply is used for supplying power to the transmission control unit and the driving unit;
the transmission control unit is used for outputting a control signal to the driving unit;
the driving unit is used for controlling the switching state of each switching tube in the three-phase inverter according to the control signal so as to enable the three-phase inverter to invert the direct current input by the direct current input end into alternating current; the switching state of a switching tube in the chopping unit is controlled according to the control signal, so that the chopping unit carries out chopping treatment on the direct current input by the direct current input end;
the chopping unit includes:
IGBTs and diodes; the grid electrode of the IGBT is connected with the driving unit, the collector electrode of the IGBT is connected with the positive electrode of the direct current input end of the converter module, the emitter electrode of the IGBT is connected with the cathode of the diode, and the energy release assembly, and the anode of the diode is connected with the negative electrode of the direct current input end of the converter module;
the converter module is also provided with an air channel assembly, the radiator is arranged in the air channel assembly, and an air inlet of the air channel assembly can be connected with an external air inlet channel; the air duct component provides a channel for cooling air flow and is used for bearing the whole converter module, and the converter module is installed in the converter cabinet as a mechanical installation interface of the converter module;
the driving unit comprises an MOS tube driving plate and an IGBT driving plate;
the converter module comprises a first control circuit layer, a second main circuit layer and a third structural layer from top to bottom; the radiator is arranged in the air duct assembly and is positioned on the third structural layer; the three-phase inverter, the chopping unit, the composite busbar, the discharge resistor and the supporting capacitor are positioned on the second main circuit layer; the power supply, the transmission control unit, the MOS tube driving plate and the IGBT driving plate are positioned on the first control circuit layer.
2. The converter module of claim 1, wherein the three-phase inverter comprises six silicon carbide MOS transistors, the six silicon carbide MOS transistors comprising three legs of the three-phase inverter, each leg comprising two of the silicon carbide MOS transistors.
3. The converter module of claim 2, wherein two of said silicon carbide MOS transistors of each leg of said three-phase inverter are packaged in an LV100 or XHP2 packaging mode.
4. The converter module of claim 1, wherein the IGBTs are packaged in a HVIGBT or IHV package.
5. The converter module of claim 1, comprising two of said three-phase inverters and two of said chopper units.
6. The converter module of claim 1, wherein the heat sink is a 3D composite phase change heat sink.
7. The converter module of claim 1, wherein the air inlet of the air duct assembly is provided with a sealing rubber ring.
8. The converter module of claim 1, wherein the power supply is connected to 110V dc power and outputs 15V dc power to the drive unit and 24V dc power to the transmission control unit.
9. The converter module according to claim 1, wherein the drive unit is connected to the transmission control unit by means of optical fibers.
10. The converter module of claim 1, wherein a dc input of the converter module is connected to a composite busbar, and wherein the chopper unit and the three-phase inverter are both connected to the composite busbar.
11. The converter module of claim 1, wherein the three-phase inverter is connected to conductive copper bars as ac output terminals of the converter module and output terminals of the chopper unit.
12. The converter module of claim 1, wherein said support capacitor is a dry, shell-less metallized safety film capacitor.
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| CN202010767494.1A CN114094842B (en) | 2020-08-03 | 2020-08-03 | Converter module |
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| CN202010767494.1A CN114094842B (en) | 2020-08-03 | 2020-08-03 | Converter module |
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| CN114094842A (en) | 2022-02-25 |
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