WO2018103125A1

WO2018103125A1 - Traction power module

Info

Publication number: WO2018103125A1
Application number: PCT/CN2016/109742
Authority: WO
Inventors: 王彬; 高永军; 王雷; 李守蓉
Original assignee: 中车永济电机有限公司
Priority date: 2016-12-09
Filing date: 2016-12-13
Publication date: 2018-06-14
Also published as: ZA201904503B; CN108233725A; UA123419C2

Abstract

A traction power module, comprising: a frame (1), a water-cooled substrate (3), two IGBT components (4), two composite busbars (5), a drive circuit board (6), a high-voltage connector (7), and a photoelectric connector (8); when the traction power module is used for rectification, any two of four high-voltage alternating current terminals (13) are connected in parallel to serve as rectifier input ends; or when the traction power module is used for inverter chopping, any three of the four high-voltage alternating current terminals (13) serve as inverter output ends, and the remaining high-voltage alternating current terminal (13) serves as a chopper output end. The traction power module reduces the number of types and economic costs of power modules, and facilitates installation and maintenance of workers.

Description

Traction power module

Technical field

The present invention relates to the field of electrical technologies, and in particular, to a traction power module.

Background technique

In the high-power AC drive electric locomotive or high-speed EMU, the traction four-quadrant power module and the traction inverter chopper power module are the main power modules of the main circuit of the converter system. The traction four-quadrant power module completes the rectification function, and the traction inverter chopper power module completes the inverter and chopping functions. They combine to complete the functional transformation of the converter system to provide the required voltage and current for the traction motor.

However, this combination shows that two different types of power modules are required in the traction converter system for respectively implementing the rectification function and the inverter chopping function. Due to the traction system, there are not only traction systems, but also auxiliary systems, and there are many types of power modules. In this way, when various locomotive sections or motor trains prepare spare parts for train operation, many types of power modules are required, resulting in high economic cost and inconvenience in installation and maintenance.

Summary of the invention

The invention provides a traction power module, which reduces the number of types of power modules and economic costs, and is convenient for installation and maintenance of workers.

The traction power module provided by the invention comprises: a frame, a water-cooled substrate, two insulated gate bipolar transistor IGBT components, two composite busbars, a driving circuit board, a high voltage connector and an optical connector;

The frame comprises two side plates; the water-cooled substrate is disposed in the middle of the two side plates; the first water interface, the second water interface and the positioning pin are disposed on the side of the water-cooled substrate near the rear end of the frame;

Two IGBT components are respectively disposed on both sides of the water-cooled substrate, and a composite busbar is disposed between the side plate on the same side of the water-cooled substrate and the IGBT component; the IGBT component and the composite busbar on the same side of the water-cooled substrate are electrically connected. a high-voltage DC terminal electrically connected to the IGBT component is disposed on a side of the composite busbar near the front end of the frame;

The driving circuit board and the photoelectric connector are both disposed outside the side plate; the photoelectric connector is electrically connected to the driving circuit board; and the driving circuit board is electrically connected to the two IGBT components respectively;

The high-voltage connector is disposed at the rear end of the water-cooled substrate, and the high-voltage connector is electrically connected to the two composite busbars respectively. The high-voltage connector is provided with four high-voltage AC terminals, and each IGBT component is respectively communicated with the two high voltages through the composite busbar. The terminal is electrically connected; the high-voltage connector is provided with a through hole matched with the positioning pin, the first water interface and the second water interface;

When the traction power module is used for rectification, any two of the four high voltage AC terminals are connected in parallel as the rectification input terminal; or, when the traction power module is used for inverter chopping, any three of the four high voltage AC terminals are used. As the inverter output terminal, the remaining one high voltage AC terminal is used as the chopper output terminal;

The photoelectric connector is used for transmitting a driving power signal, a driving control optical signal and a power unit state feedback optical signal; the driving circuit board is configured to process the driving control optical signal to generate an electrical signal for controlling the operation of the IGBT component.

The present invention provides a traction power module. The traction power module provided by the invention comprises a IGBT component, and the IGBT component can realize rectification or inverter chopping on one type of power module, thereby reducing the number of types of the power module and the economic cost, and facilitating the installation of the worker. And repair.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic structural view of a traction power module in an AA' direction according to Embodiment 1 of the present invention;

2 is a schematic structural view of a traction power module in an A'A direction according to Embodiment 1 of the present invention;

3 is a schematic exploded view of a traction power module according to Embodiment 1 of the present invention;

4 is a schematic layout diagram of an IGBT assembly according to Embodiment 1 of the present invention;

FIG. 5 is a schematic diagram of a main circuit for implementing rectification according to Embodiment 1 of the present invention; FIG.

FIG. 6 is a schematic diagram of a main circuit of a user implementing inverter chopping according to Embodiment 1 of the present invention.

Description of the reference signs:

1: frame; 2: side panels;

3: water-cooled substrate; 4: IGBT component;

5: composite busbar; 6: drive circuit board;

7: high voltage connector; 8: photoelectric connector;

9: first water interface; 10: second water interface;

11: positioning pin; 12: high voltage DC terminal;

13: high voltage AC terminal; 14: through hole;

15: IGBT; 16: configuration protection board;

17: shielding plate; 18: cover plate.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a schematic structural view of a traction power module in an AA' direction according to Embodiment 1 of the present invention. 2 is a schematic structural view of a traction power module in an A'A direction according to Embodiment 1 of the present invention. FIG. 3 is a schematic exploded view of a traction power module according to Embodiment 1 of the present invention. As shown in FIG. 1 to FIG. 3, the traction power module provided in this embodiment may include: a frame 1, a water-cooled substrate 3, two insulated gate bipolar transistors IGBT15 component 4, two composite busbars 5, and a driving circuit board. 6. High voltage connector 7 and optoelectronic connector 8.

The frame 1 comprises two side panels 2. The water-cooled substrate 3 is disposed in the middle of the two side plates 2. The first water interface 9, the second water port 10, and the positioning pin 11 are disposed on the side of the water-cooled substrate 3 near the rear end of the frame 1.

Two IGBT modules 4 are respectively disposed on both side surfaces of the water-cooled substrate 3, and a composite busbar 5 is disposed between the side plate 2 on the same side of the water-cooled substrate 3 and the IGBT assembly 4. Located in the water The IGBT unit 4 on the same side of the cold substrate 3 and the composite bus bar 5 are electrically connected, and the high voltage DC terminal 12 electrically connected to the IGBT unit 4 is disposed on the side of the composite bus bar 5 near the front end of the frame 1.

The drive circuit board 6 and the optoelectronic connector 8 are both disposed outside the side panel 2. The optoelectronic connector 8 is optically coupled to the drive circuit board 6. The drive circuit board 6 is electrically connected to the two IGBT assemblies 4, respectively.

The high voltage connector 7 is disposed at the rear end of the water-cooled substrate 3, and the high voltage connector 7 is electrically connected to the two composite bus bars 5, respectively, and the high voltage connector 7 is provided with four high voltage AC terminals 13, each of which passes through the composite mother The row 5 is electrically connected to the two high voltage AC terminals 13, respectively. The high pressure connector 7 is provided with a through hole 14 that matches the positioning pin 11, the first water port 9, and the second water port 10.

When the traction power module is used for rectification, any two of the four high voltage AC terminals 13 are connected in parallel as a rectified output. Alternatively, when the traction power module is used for inverter chopping, any three of the four high voltage AC terminals 13 are used as the inverter output terminals, and the remaining one of the high voltage AC terminals 13 is used as the chopper output terminal.

The optoelectronic connector 8 is used to transmit a driving power signal, a driving control optical signal, and a power unit state feedback optical signal. The drive circuit board 6 is used to process the drive control optical signal to generate an electrical signal that controls the operation of the IGBT assembly 4.

The traction power module provided in this embodiment has a double-sided structure layout manner on the mechanical structure. The opposite ends of the frame 1 in the longitudinal direction are respectively referred to as a front end and a rear end, and the frame 1 has two side plates 2, and in the direction of one side plate to the other side plate in the frame 1, the layered structure is: Side plate 2, composite bus bar 5, IGBT module 4, water-cooled substrate 3, IGBT module 4, composite bus bar 5, side plate 2. The two IGBT components 4 are respectively located on the outer surfaces of the two sides of the water-cooled substrate 3. On the outer side of the side panel 2, an optoelectronic connector 8 and a drive circuit board 6 are provided. In the direction of the front end of the frame 1, a high voltage DC terminal 12 is disposed on each of the composite bus bars 5. In the direction of the rear end of the frame 1, a high voltage connector 7 is disposed, and the water-cooled substrate 3 is provided with a positioning pin 11, a first water port 9, and a second water port 10. Among them, the high voltage connector 7 is provided with a high voltage AC terminal 13.

In the traction power module provided in this embodiment, on the optical path and the circuit connection, on each side of the water-cooled substrate 3, the IGBT component 4 is electrically connected to the composite busbar 5, and the composite busbar 5 is provided with a high voltage DC terminal 12. Both IGBT components 4 are electrically connected to the drive circuit board 6. An optical connection between the driving circuit board 6 and the optoelectronic connector 8 is for transmitting optical signals and electrical signals. Two The IGBT assembly 4 is also electrically connected to the high voltage connector 7. The high voltage connector 7 is provided with four high voltage AC terminals 13, each of which is electrically connected to two high voltage AC terminals 13, respectively. The high voltage DC terminal 12 and the high voltage AC terminal 13 are electrically connected to an external device. The optoelectronic connector 8 is optically coupled to an external device for transmitting optical signals and electrical signals.

The converter will be described in detail below with an external device.

When the traction power module is used to implement the rectification function, any two of the four high voltage AC terminals 13 are connected in parallel as a rectification input terminal, and the high voltage DC terminal 12 serves as a rectification input terminal. When the traction power module is used to implement the inverter chopping function, the high voltage DC terminal 12 serves as the input end of the inverter chopping, and any three of the four high voltage AC terminals 13 serve as the inverter output terminal, and the remaining one of the high voltage AC terminals 13 as the chopping output. The photoelectric connector 8 transmits a driving power signal and a driving control signal provided by the converter, wherein the driving power signal is an electrical signal, and the driving control signal is an optical signal. The drive control signal is used to control the operation of the traction power module. The drive power signal provides operating power to the drive circuit board 6. The photoelectric connector 8 transmits the driving control optical signal to the driving circuit board 6. The driving circuit board 6 performs photoelectric conversion processing on the driving control optical signal, generates an electrical signal for controlling the operation of the IGBT component 4, and transmits the electrical signal to the IGBT component 4 . The drive circuit board 6 also receives a power unit status feedback signal generated by the IGBT assembly 4, the power unit status feedback signal being an electrical signal. The driving circuit board 6 electrically and optically converts the power unit status signal and transmits it to the converter through the photoelectric connector 8.

Wherein, when the traction power module is used to implement the rectification function, the parallel high voltage AC terminals 13 need to work under the synchronous drive control signal. Specifically, it can be implemented by the signal processing function of the driving circuit board 6, or by using the optical path of the same length and the physical connection of the circuit, which is not specifically limited in this embodiment.

In this embodiment, the main circuit of the traction power module includes two IGBT components 4, and the main circuit is connected by a composite busbar 5. The main circuit can realize the rectification function or the inverter chopping function. Due to the compact and compact structure of the composite busbar 5, the connection between the high current and high voltage components can be realized by using a small space, thereby ensuring the miniaturization design of the traction power module. Since the composite busbar 5 has small stray inductance and does not require an additional absorbing circuit, the cost of the traction power module is reduced, and the reliability of the traction power module is enhanced.

In this embodiment, the traction power module is based on the water-cooled substrate 3, and adopts a double-sided heat dissipation mode, and the two IGBT assemblies 4 are respectively located on both sides of the water-cooled substrate 3. By circulating water cooling The substrate 3 cools the coolant in the water channel, and removes the heat generated when the IGBT module 4 is operated, thereby improving the cooling performance of the traction power module and reducing the volume, thereby providing a guarantee for the system to be lightweight and compact.

In the present embodiment, the high-voltage connector 7 is provided with a through hole 14 matching the positioning pin 11, the first water port 9 and the second water port 10, so that the positions of the high-voltage connector 7 and the water-cooled substrate 3 are relatively fixed, thereby The position of the high voltage connector 7 when electrically connected to the composite bus bar 5 is made more accurate, and the accuracy of the electrical connection between the high voltage connector 7 and the composite bus bar 5 is improved.

It can be seen that the traction power module provided in this embodiment can implement rectification or inverter chopping on one type of power module, which reduces the number of types and economic cost of the power module, and is convenient for installation and maintenance of the staff.

Optionally, when the traction power module is used for rectification, two high voltage AC terminals 13 electrically connected to the same IGBT component 4 are connected in parallel as a rectification output terminal.

By connecting two high-voltage AC terminals 13 electrically connected to the same IGBT component 4 in parallel, the stray inductance can be reduced, the circuit wiring can be simplified, and the working stability of the traction power module in realizing the rectification function can be improved.

Optionally, a plurality of lightening holes may be disposed on the side plate 2.

By providing the weight reducing holes, the weight of the side panels 2 can be reduced, thereby reducing the overall weight of the traction power unit.

In addition, in the present embodiment, the type of the water-cooled substrate 3 and the layout of the cooling water passage in the water-cooled substrate 3 are not particularly limited.

It should be noted that the connection manner of the high voltage connector 7 and the water-cooled substrate 3 in this embodiment is not particularly limited. For example: it can be screwed or bolted.

Optionally, the high voltage connector 7 is further provided with a through hole mounted with the water-cooled substrate 3.

The connection stability of the high voltage connector 7 and the water-cooled substrate 3 can be further enhanced by providing a through hole to be mounted with the water-cooled substrate 3.

It should be noted that, in this embodiment, the circuit implementation of the IGBT component 4 is not particularly limited, as long as the rectification and inverter chopping functions are implemented.

Optionally, as a specific implementation manner, the IGBT component 4 includes two bridge arms composed of four IGBTs. A high voltage AC terminal 13 is disposed between the two IGBTs of each bridge arm. Both ends of each bridge arm are electrically connected to a high voltage DC terminal 12, respectively.

FIG. 5 is a schematic diagram of a main circuit for implementing rectification according to Embodiment 1 of the present invention. FIG. 6 is a schematic diagram of a main circuit of a user implementing inverter chopping according to Embodiment 1 of the present invention. As shown in FIGS. 5 to 6, H1a, H2a, H3a, H4a, B1a, B2a, B3a, and B4a are all IGBTs. Among them, one IGBT component 4 includes H1a, H2a, B1a, B2a, and the other IGBT component 4 includes H3a, H4a, B3a, B4a. As shown in FIG. 5, when the traction power module is used for rectification, the high voltage AC terminals 13 corresponding to the two bridge arms of each IGBT assembly 4 are connected in parallel to form rectification input terminals S(A) and S(B), each of which The high voltage DC terminal 12 electrically connected at both ends of the bridge arm forms a rectified output terminal S (DC+) and S (DC-). As shown in FIG. 6, when the traction power module is used to implement the inverter chopping, four high-voltage AC terminals 13 corresponding to the four bridge arms of the two IGBT assemblies 4, three of the high-voltage AC terminals 13 serve as inverter outputs. The ends are respectively S(U), S(V), S(W), and the remaining one of the high voltage AC terminals 13 serves as the chopper output terminal S(C), and the high voltage DC terminal 12 electrically connected at each end of each bridge arm The input terminals S(DC+) and S(DC-) of the inverter chopping are formed.

Optionally, a configuration protection board is disposed corresponding to an outer side of each IGBT. The configuration protection board is electrically connected to the driving circuit board and the corresponding IGBT, respectively.

The protection board is configured for signal acquisition and transmission of overvoltage clamp and short circuit protection of the IGBT.

Specifically, the configuration circuit board can be directly mounted on the auxiliary electrical connection terminal of the IGBT. By arranging a configuration protection board adjacent to the IGBT for each IGBT, the drive protection performance of the IGBT can be optimized, thereby improving the reliability of the system.

It should be noted that, in this embodiment, the manner of electrical connection between the driving circuit board 6 and the configuration protection board is not particularly limited. For example, a wire harness can be used to make an electrical connection.

It should be noted that the electrical connection manner between the driving circuit board 6 and the IGBT assembly 4 in this embodiment is not particularly limited. For example, a wire harness can be used to make an electrical connection.

Alternatively, the IGBT is evenly distributed on the outer surface of the water-cooled substrate 3.

As a specific implementation manner, FIG. 4 is a schematic diagram of a layout of an IGBT assembly according to Embodiment 1 of the present invention. As shown in FIG. 4, the IGBT 15 is distributed on the water-cooled substrate 3 in a 2×2 matrix, which saves the surface space of the water-cooled substrate 3, and is advantageous for miniaturization of the power module. The IGBT 15 is in one-to-one correspondence with the layout protection board 16.

Optionally, the two IGBT components 4 and/or the configuration protection plates are mirror-symmetrically distributed on both side surfaces of the water-cooled substrate 3.

Alternatively, the number of drive control signals of the drive circuit board 6 is the same as the number of IGBTs.

It should be noted that the number of the driving circuit board 6 and the photoelectric connector 8 in this embodiment is not particularly limited, and may be one or plural.

Alternatively, if the number of the driving circuit board 6 and the photoelectric connector 8 is one, the driving circuit board 6 and the photoelectric connector 8 are located outside the same side panel 2 of the frame 1.

By arranging the driving circuit board 6 and the optoelectronic connector 8 on the same side, the physical connection between the driving circuit board 6 and the optoelectronic connector 8 can be simplified, so that the modular layout and circuit wiring of the traction power unit are more compact, Conducive to miniaturization.

Optionally, if there are multiple driving circuit boards 6, the driving circuit boards 6 are disposed on the outer sides of the two side boards 2. The IGBT unit 4 on the same side of the water-cooled substrate 3 is electrically connected to the drive circuit board 6.

By the double-sided driving circuit board mounting method, the physical connection between the driving circuit board 6 and the IGBT component 4 can be simplified, so that the modular layout and circuit wiring of the power unit are more compact, which is advantageous for miniaturization.

Optionally, if there are multiple driving circuit boards 6 and optical connectors 8, the optical connectors 8 are disposed on the outer sides of the two side plates 2, and the optical connectors 8 and the driving circuits on the same side of the water-cooled substrate 3 are provided. The board 6 is optically connected.

Optionally, a shielding plate 17 is disposed between the composite bus bar 5 and the side plate 2 on the same side of the water-cooled substrate 3 .

By installing the shielding plate 17 between the high voltage composite busbar 5 and the low voltage driving circuit, the electromagnetic interference of the IGBT switch to the low voltage circuit can be greatly reduced, thereby reliably controlling and protecting the IGBT, and improving the reliability and stability of the system.

It should be noted that the material and shape of the shielding plate 17 are not particularly limited in this embodiment.

Optionally, a cover plate 18 is disposed on an outer side of the driving circuit board 6.

By providing the cover plate 18, the internal circuit structure of the drive circuit board 6 and the traction power unit can be further protected to provide isolation protection for the main circuit components.

It should be noted that the material and structure of the cover plate 18 are not particularly limited in this embodiment.

Optionally, the cover 18 is made of a transparent material.

The embodiment provides a traction power module, including: a frame, a water-cooled substrate, two IGBT components, two composite busbars, a driving circuit board, a high voltage connector, and an optoelectronic connector. Ben The traction power module provided by the embodiment can realize rectification or inverter chopping through the IGBT component, that is, rectification or inverter chopping can be realized on one type of power module, which reduces the number of types and economic cost of the power module, and is convenient. Staff installation and maintenance. Moreover, the main circuit is connected by a composite busbar, and the power unit adopts a water-cooled double-sided heat dissipation method to reduce the volume, which is advantageous for miniaturization and weight reduction of the traction power unit, and improves the reliability of the auxiliary converter power unit.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that the technical solutions described in the foregoing embodiments may be modified or equivalently substituted for some or all of the technical features. . The modifications and substitutions do not depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

A traction power module, comprising: a frame, a water-cooled substrate, two insulated gate bipolar transistor IGBT components, two composite busbars, a driving circuit board, a high voltage connector and an optical connector;

The frame comprises two side plates; the water-cooled substrate is disposed in the middle of the two side plates; the first water interface, the second water interface and the positioning pin are disposed on the side of the water-cooled substrate near the rear end of the frame;

Two IGBT components are respectively disposed on both sides of the water-cooled substrate, and a composite busbar is disposed between the side plate on the same side of the water-cooled substrate and the IGBT component; the IGBT component and the composite busbar on the same side of the water-cooled substrate are electrically connected. a high-voltage DC terminal electrically connected to the IGBT component is disposed on a side of the composite busbar near the front end of the frame;

The driving circuit board and the photoelectric connector are both disposed outside the side plate; the photoelectric connector is electrically connected to the driving circuit board; and the driving circuit board is electrically connected to the two IGBT components respectively;

The high-voltage connector is disposed at the rear end of the water-cooled substrate, and the high-voltage connector is electrically connected to the two composite busbars respectively. The high-voltage connector is provided with four high-voltage AC terminals, and each IGBT component is respectively communicated with the two high voltages through the composite busbar. The terminal is electrically connected; the high-voltage connector is provided with a through hole matched with the positioning pin, the first water interface and the second water interface;

When the traction power module is used for rectification, any two of the four high voltage AC terminals are connected in parallel as the rectification input terminal; or, when the traction power module is used for inverter chopping, any three of the four high voltage AC terminals are used. As the inverter output terminal, the remaining one high voltage AC terminal is used as the chopper output terminal;

The photoelectric connector is used for transmitting a driving power signal, a driving control optical signal and a power unit state feedback optical signal; the driving circuit board is configured to process the driving control optical signal to generate an electrical signal for controlling the operation of the IGBT component.
The traction power module according to claim 1, wherein the IGBT assembly comprises two bridge arms composed of four IGBTs; a high voltage AC terminal is disposed between the two IGBTs of each bridge arm; Electrically connected to a high voltage DC terminal.
The traction power module according to claim 2, wherein each of the IGBTs is provided with a protection plate disposed correspondingly; and the protection plate is electrically connected to the driving circuit board and the corresponding IGBT;

Configuration protection board for signal acquisition and transmission of overvoltage clamp and short circuit protection of IGBT lose.
The traction power module according to claim 2, wherein the number of drive control signals of the drive circuit board is the same as the number of IGBTs.
The traction power module according to any one of claims 1 to 4, characterized in that a shielding plate is disposed between the composite busbar and the side plate on the same side of the water-cooled substrate.
A traction power module according to any one of claims 1 to 4, characterized in that the outer side of the drive circuit board is provided with a cover.
The traction power module according to any one of claims 1 to 4, wherein if there are a plurality of driving circuit boards, the driving circuit boards are disposed on the outer sides of the two side plates;

The IGBT components on the same side of the water-cooled substrate are electrically connected to the driving circuit board.
The traction power module according to claim 7, wherein if there are a plurality of photoelectric connectors, the outer sides of the two side plates are provided with photoelectric connectors, and the photoelectric connectors and the driving circuit board on the same side of the water-cooled substrate are photoelectrically connection.