WO2015172350A1

WO2015172350A1 - Method for integrating traction motor and inverter, and integrative power system

Info

Publication number: WO2015172350A1
Application number: PCT/CN2014/077545
Authority: WO
Inventors: 贝特朗莫尔罗伯特
Original assignee: 中山大洋电机股份有限公司
Priority date: 2014-05-15
Filing date: 2014-05-15
Publication date: 2015-11-19

Abstract

A method for integrating a traction motor and an inverter, and an integrative power system. An inverter (1) is installed independently by using a separate inverter housing and ports are formed, the ports comprising a mechanical port and a high-voltage power supply interface, wherein the inverter housing is installed on a motor housing of a traction motor (2) by using the mechanical port so that the inverter and the traction motor are integrated, and a high-voltage electrical connection is provided between a coil winding of the traction motor (2) and an IG BT of the inverter (1) by using the high-voltage power supply interface. The system has a simple structure, is convenient and reliable to connect, and has reduced volume, weight and costs on the whole, improved overall performance and efficiency, and good heat dissipation performance and high reliability.

Description

Method for integrating traction motor and inverter and integrated power system Technical field:

The present invention relates to a method of integrating a traction motor and an inverter and an integrated power system.

Background technique :

As shown in FIG. 1, FIG. 2 and FIG. 3, the integrated power system of the existing electric vehicle includes an independent traction motor 101 and an inverter 102, and the traction motor 101 and the inverter 102 are separately and independently disposed, and high voltage power is passed between them. The cable, the low voltage signal harness and the plurality of connectors 103 are electrically connected together, and the inverter 102 includes a control box 1021 and an IGBT module 1022, a driving board 1023, and a control board (MCU) 1024 installed in the control box 1021. The motor housing 1011 of the traction motor 101 is provided with a first cooling water channel. The bottom surface of the control box 1021 is provided with a second cooling water channel 1025. The first cooling water channel and the second cooling water channel 1025 are connected in series by a water pipe 104, but The integrated power system has the following problems: 1) The traction motor and the inverter are separated and set independently, the wiring is too much, the connection is troublesome, the cost is high, and the volume is large; 2) the traction motor and the inverter are connected by high-voltage cables. The high voltage signal generated by the high voltage power cable and the IGBT module will affect the normal operation of the drive board and the control board, and there is serious interference, and the motor control is low. Reliability and operating efficiency of the device; 3) There are relatively many internal components in the inverter, the connection between the various components is quite troublesome, the wiring harness is many, the cost is high, and the connection is easy to make mistakes and the reliability is low; 4) Traction motor The motor controller and the motor controller independently dissipate heat through the cooling water channel, and the heat dissipation performance is relatively low, which affects the overall performance and efficiency of the system, and reduces the service life and reliability of the system.

Summary of the invention:

The object of the present invention is to provide a method and an integrated power system for integrating a traction motor and an inverter. The system has a simple structure, convenient and reliable connection, and reduces the volume, weight and cost of the whole system, and improves the system. Overall performance and efficiency, high reliability.

The object of the present invention is achieved by the following technical solutions.

A method of integrating a traction motor and an inverter, characterized in that the inverter is independently mounted and formed with a separate inverter housing, the interface comprising a mechanical interface and a high voltage power supply interface, wherein: The inverter housing is mounted on the motor housing of the traction motor by means of a mechanical interface; the high voltage power interface provides a high voltage electrical connection between the coil winding of the traction motor and the IGBT of the inverter. .

The interface described above also includes a low voltage signal interface that provides a low voltage electrical connection between the traction motor and the inverter using a low voltage signal interface, and directs the detection signal inside the traction motor to the inverter through the low voltage signal interface.

The interface described above also includes a cooling system interface that provides a cooling medium flow between the inverter housing and the motor housing using a cooling system interface.

An integrated integrated power system of a traction motor and an inverter, comprising an inverter and a traction motor, the traction motor comprising a stator assembly, a rotor assembly and a motor housing, wherein the coil assembly is provided with a coil winding; The inverter includes a control board, a driving board, and an IGBT module, wherein the inverter further includes an inverter housing, wherein the inverter housing is mounted with a control board, a driving board, and an IGBT module; and the inverter housing passes The mechanical interface is mounted on the motor housing, and the traction motor and the inverter are connected through a high-voltage power interface, so that the coil winding and the IGBT module of the inverter are connected to high voltage.

The traction motor and the inverter described above are also connected through a low voltage signal interface, and the low voltage signal interface feeds back the operating state of the traction motor to the inverter.

The traction motor and the inverter described above are also connected through a cooling system interface. The bottom of the inverter housing has a cooling water channel and forms a first water inlet and a first water outlet, and the motor housing also has a cooling water channel. A second water inlet and a second water outlet are formed, and the first water outlet and the second water inlet are connected through a cooling system interface to connect the cooling water passage of the inverter housing in series with the cooling water passage of the motor housing.

The cooling system interface described above is a water pipe interface.

The mechanical interface described above includes a plurality of mounting legs extending from the inverter housing, the top of the motor housing extends out of the support seat, the inverter housing is located at the top of the motor housing, and the plurality of mounting feet are supported on the support The seat is locked with screws.

The high-voltage power supply interface described above includes a high-voltage power supply terminal from an internal IGBT module extending to the bottom surface of the inverter, a mounting seat at the end of the motor housing, and a wiring cavity under the mounting seat, and traction current The coil winding of the machine is connected to the coil terminal inside the wiring cavity of the motor housing, and the high voltage power terminal extends through the mounting seat into the wiring cavity and is electrically connected to the coil terminal.

An annular skirt is protruded from the outer end surface of the end cover, and the annular skirt encloses a wiring cavity, and the annular skirt is provided with a mounting cover.

The low voltage signal interface described above includes a resolver signal terminal and a motor temperature sensor terminal, and the signal line is taken from the resolver and the motor temperature sensor and connected to the resolver signal terminal and the motor temperature sensor terminal, next to the high voltage power interface, A lead socket extends from the bottom surface of the transformer, and the lead socket extends through the mounting seat into the wiring cavity, and the resolver signal terminal and the motor temperature sensor terminal are inserted into the bow I-line socket.

The inverter housing described above is also provided with a high voltage DC bus voltage input interface and an external low voltage signal interface.

There is a high pressure interlock mechanism between the wiring chamber and the mounting cover described above.

The high-voltage interlocking mechanism described above includes a first connector installed in the wiring cavity and a second connector mounted on the mounting cover, and the first connector is mounted when the mounting cover is mounted on the top surface of the annular skirt And the second connector pair is plugged together, the low voltage signal interface further comprises a high voltage interlock terminal, the signal line drawn from the first connector is connected with the high voltage interlock terminal, and the high voltage interlock terminal is inserted into the lead socket in.

Compared with the prior art, the invention has the following effects:

1) A method of integrating a traction motor and an inverter, the inverter is independently installed and formed with a separate inverter housing, the interface includes a mechanical interface and a high voltage power interface, and the inverter housing is mounted by a mechanical interface The motor housing of the traction motor is integrated, and a high-voltage power interface is used to provide a high-voltage electrical connection between the coil winding of the traction motor and the IGBT of the inverter, and the low-voltage signal interface is used to provide a traction motor between the inverter and the inverter. The low-voltage electrical connection leads the detection signal inside the traction motor to the inverter through the low-voltage signal interface. The method is simple, the connection is simple and convenient, the overall performance and efficiency of the system can be improved, the connection line speed is reduced, the reliability is high, and the cost is low. Low; additionally, the cooling system interface is used to provide a cooling medium to flow between the inverter housing and the motor housing, which is better in heat dissipation and compact; 2) The integrated power system of the present invention comprises an inverter and a traction motor, the inverter further comprises an inverter housing, wherein the inverter housing is mounted with a control board, a driving board and an IGBT module; the inverter housing passes The mechanical interface is installed on the motor housing, and the traction motor and the inverter are connected through a high-voltage power interface, so that the coil winding and the IGBT module of the inverter are connected to high-voltage power, and the connection is simple and convenient, and the whole system can be improved. Performance and efficiency, reduced wire speed, high reliability, low cost, and compact size.

3) The integrated power system traction motor and the inverter are also connected through a low voltage signal interface, and the low voltage signal interface sends the operating parameters of the traction motor to the inverter, the connection is convenient and reliable, and the reliability is high;

4) The first water outlet of the integrated power system and the second water inlet are connected through the cooling system interface to connect the cooling water channel of the inverter housing with the cooling water channel of the motor housing, the structure is simple, the connection is convenient and reliable, and the connection can be improved. The heat dissipation performance and efficiency of the system, P lowers the production cost;

5) The mechanical interface of the integrated power system includes a plurality of mounting feet extending from the inverter housing, the top of the motor housing protrudes from the support seat, the inverter housing is located at the top of the motor housing, and a plurality of mounting feet Supported on the support base and locked together by screws, the structure is simple, the installation is convenient and firm, the reliability is high, and the volume is small;

6) The high-voltage power supply interface includes a high-voltage power supply terminal from the internal IGBT module extending to the bottom surface of the inverter and a mounting seat at the end of the motor housing, and the coil winding of the traction I motor is connected to the wiring of the motor housing The coil terminal inside the cavity, the high voltage power terminal extends through the mounting seat into the wiring cavity and is electrically connected to the coil terminal, and the low voltage signal interface includes a resolver signal terminal and a motor temperature sensor terminal, and the signal line is from the resolver and the motor temperature The sensor is led out and connected to the resolver signal terminal and the motor temperature sensor terminal. A lead socket is extended on the bottom surface of the inverter next to the high voltage power interface, and the lead socket extends through the mount into the wiring cavity, and the resolver signal terminal And the motor temperature sensor terminal is inserted into the lead socket, the wiring is convenient, the structure is simple, the integration degree is high, the connection harness is small, and the reliability of the product is improved;

7) An annular skirt is protruded on the outer end surface of an end cover, the annular skirt is surrounded by a wiring cavity, and a mounting cover is arranged on the annular skirt. When the wiring is completed, the cover is mounted on the cover, so that the dustproof and waterproof Improved performance and safety, convenient and reliable; 8) There is a high-voltage interlocking mechanism between the wiring cavity and the mounting cover. When the mounting cover is opened, the high-voltage interlocking mechanism disconnects the high-voltage power supply of the inverter to ensure the safety of operation.

BRIEF DESCRIPTION OF THE DRAWINGS:

1 is a schematic view of an integrated power system of an existing electric vehicle;

Figure 2 is an exploded view of the prior art motor controller;

Figure ³ is another exploded view of the prior art motor controller;

Figure 4 is a perspective view of an angle of the present invention;

Figure 5 is a perspective view of another angle of the present invention;

Figure 6 is an exploded view of the present invention;

Figure 7 is a top view of the present invention;

Figure 8 is a cross-sectional view taken along line A-A of Figure 7;

Figure 9 is a cross-sectional view taken along line B-B of Figure 7;

Figure 10 is a perspective view of an inverter of the present invention;

Figure 11 is another exploded view of the present invention;

Figure 12 is a partial enlarged view of C-C in Figure 11;

Figure 13 is a perspective view of the mounting cover of the present invention;

Figure 14 is a circuit schematic of the present invention.

detailed description:

The present invention will now be described in further detail by way of specific embodiments and the accompanying drawings.

Embodiment 1 As shown in FIG. 4 to FIG. 14 , the present invention is an integrated integrated power system of a traction motor and an inverter, comprising an inverter 1 (inverter) and a traction motor 2, and the traction motor 2 The stator assembly 21, the rotor assembly 22, and the motor housing 23 are provided with a coil winding 211 on the stator assembly 21; the inverter 1 (inverter) includes a control board 11, a drive board 12, an IGBT module 13, and an inverter 1 The (inverter) further includes an inverter housing 3 in which the control board 11, the driving board 12, and the IGBT module 13 are mounted; the inverter housing 3 is mounted on the motor housing 23 via the mechanical interface 4. , the traction motor 2 and the inverter 1 (inverter) are connected by a high voltage power interface 5 to make the coil winding The group 211 and the IGBT module 13 of the inverter 1 (inverter) are energized. The IGBT module 13 includes a switch tube T1, a switch tube Τ2, a switch tube Τ3, a switch tube Τ4, a switch tube Τ5, a switch tube Τ6, a diode D1, a diode D2, a diode D3, and a diode D4. , the diode D5, the diode D6; the above parts are combined into three bridge arms, the switch tube Tl, the switch tube Τ2, the switch tube Τ3, the switch tube Τ4, the switch tube Τ5, the control end of the switch tube Τ6 and the control board 11 Connected, the control board 11 is a microprocessor MCU, and the control board 11 controls the operation of the inverter 1 (inverter) through the drive board 12.

The traction motor 2 and the inverter 1 (inverter) are also connected via a low voltage signal interface 6, and the low voltage signal interface 6 feeds back the operating state of the traction motor 2 to the inverter 1 (inverter). The traction motor 2 and the inverter 1 (inverter) are also connected by a cooling system interface 7, the bottom of the inverter housing 3 is provided with a cooling water channel 30 and forms a first water inlet 31 and a first water outlet 32, the motor The housing 23 also has a cooling water passage 230 and forms a second water inlet 231 and a second water outlet 232. The first water outlet 32 and the second water inlet 231 are connected through a cooling system interface 7 to connect the cooling water passage 30 of the inverter housing 3. It is connected in series with the cooling water passage 230 of the motor housing 23. The cooling system interface 7 is a water pipe connection 71. The mechanical interface 4 includes a plurality of mounting legs 33 extending from the inverter housing 3. The top of the motor housing 23 protrudes from the support base 233, and the inverter housing 3 is located at the top of the motor housing 23, The mounting feet 33 are supported on the support base 233 and are screwed together. The high voltage power supply interface 5 includes a high voltage power supply terminal 51 from which the internal IGBT module 13 is extended to the bottom surface of the inverter 1 (inverter), a mount 234 at the end of the motor housing 23, and a wiring chamber 235 below the mount 234. The coil winding 211 of the traction motor 2 is connected to the coil terminal 24 inside the wiring chamber 235 of the motor housing 23, and the high voltage power supply terminal 51 extends through the mounting seat 234 into the wiring chamber 235 and is electrically connected to the coil terminal 24. An annular skirt 251 is formed on the outer end surface of the end cover 25. The annular skirt 251 encloses a wiring chamber 235, and the annular skirt 251 is provided with a mounting cover 26. The low voltage signal interface 6 includes a resolver signal terminal 61 and a motor temperature sensor terminal 62, and the signal line 63 is taken from the resolver and the motor temperature sensor and connected to the resolver signal terminal 61 and the motor temperature sensor terminal 62 at the high voltage power interface 5 A lead socket 14 is protruded from the bottom surface of the inverter 1 (inverter), and the lead socket 14 extends through the mounting seat 234 into the wiring cavity 235, and the resolver signal terminal 61 and the motor temperature pass The sensor terminal 62 is inserted into the bow socket 14. A high voltage DC bus voltage input interface 15 and an external low voltage signal interface 16 are also disposed on the inverter housing 3, and the external low voltage signal interface 16 is used for connection with the vehicle control system. There is a high pressure interlock mechanism between the wiring chamber 235 and the mounting cover 26. The high voltage interlocking mechanism includes a first connector 27 mounted in the wiring cavity 235 and a second connector 28 mounted on the mounting cover 26, and the mounting cover 26 is mounted on the top surface of the annular skirt 251. When the first connector 27 and the second connector 28 are plugged together, the low voltage signal interface 6 further includes a high voltage interlock terminal 64, and the signal line 63 drawn from the first connector 27 is interlocked with the high voltage. The terminal 64 is connected and the high voltage interlock terminal 64 is inserted into the bow socket 14. When the mounting cover 26 is opened, the first connector 27 and the second connector 28 will be disconnected, and the first connector 27 outputs a control signal to the inverter 1 (inverter) through the high voltage interlock terminal 64 of the signal line 63. Cut off the high voltage power supply.

The high pressure interlocking mechanism may also be a travel switch. When the mounting cover 26 is mounted on the top surface of the annular skirt 251, the mounting cover 26 presses the travel switch to close the travel switch. Similarly, when the cover 26 is opened, the switch will be disconnected, and the travel switch will output a control signal to the inverter 1 (inverter) to cut off the high voltage supply.

Claims

Rights request

1. A method of integrating a traction motor and an inverter, characterized in that the inverter is independently mounted and formed with a separate inverter housing, the interface comprising a mechanical interface and a high voltage power supply interface, wherein: The inverter housing is mounted on the motor housing of the traction motor to form an integral body; the high voltage power interface provides a high voltage electrical connection between the coil winding of the traction motor and the IGBT of the inverter.

2. The method of integrating a traction motor and an inverter according to claim 1, wherein: the interface further comprises a low voltage signal interface for providing a low voltage electrical connection between the traction motor and the inverter using a low voltage signal interface The detection signal inside the traction motor is led to the inverter through the low voltage signal interface.

3. A method of integrating a traction motor and an inverter according to claim 1 or 2, wherein the interface further comprises a cooling system interface, the cooling system interface is used to provide a cooling medium in the inverter housing and the motor housing Flow between the bodies.

4. An integrated integrated power system for a traction motor and an inverter implementing the method of any one of claims 1 to 3, comprising an inverter (1) and a traction motor (2), said traction motor ( 2) comprising a stator assembly (21 rotor assembly (22) and motor housing (23), a coil winding (211) is arranged on the stator assembly (21); the inverter (1) comprises a control board (11 X drive) Board (12 IGBT module (13), characterized in that the inverter (1) also includes an inverter housing (3), and the inverter housing (3) is mounted with a control board (11 λ drive board (12 X) The IGBT module (13); the inverter housing (3) is mounted on the motor housing (23) via a mechanical interface (4), and the high voltage power interface is passed between the traction motor (2) and the inverter (1) (5) Connect so that the coil winding (211) and the IGBT module (13) of the inverter (1) are connected to high voltage.

5. An integrated integrated power system for a traction motor and an inverter according to the method of claim 4, characterized in that the traction motor (2) and the inverter (1) are also connected via a low voltage signal interface ( 6) Connection, low voltage signal interface (6) feed back the operating state of the traction motor (2) to the inverter (1 1

6. Integrated integrated power system for traction motors and inverters according to the method of claim 5, characterized in that the traction motor (2) and the inverter (1) are also connected via a cooling system interface (7) , The bottom of the inverter housing (3) has a cooling water channel (30) and forms a first water inlet (31) and a first water outlet (32), and the motor housing (23) also has a cooling water channel (230) and is formed. a second water inlet (231) and a second water outlet (232), the first water outlet (32) and the second water inlet (231) are connected through a cooling system interface (7) for the inverter housing (3) The cooling water channel (30) is connected in series with the cooling water channel (230) of the motor housing (23).

7. Integrated integrated power system for traction motors and inverters according to the method of claim 6, characterized in that said cooling system interface (7) is a water pipe connection (71).

8. An integrated integrated power system for a traction motor and an inverter according to the method of claim 4 or 5 or 6 or 7, characterized in that said mechanical interface (4) comprises a slave housing (3) a plurality of protruding mounting feet (33), the top of the motor housing (23) protrudes from the support seat (233), and the inverter housing (3) is located at the top of the motor housing (23), and a plurality of mounting feet (33) Supported on the support base (233) and screwed together.

9. An integrated integrated power system for a traction motor and an inverter according to the method of claim 4 or 5 or 6 or 7, characterized in that said high voltage power supply interface (5) comprises an IGBT module from the inside ( 13) Extend to the high voltage power supply terminal on the bottom surface of the inverter (1) (the mounting seat (234) at the end of the 51 X motor housing (23) and the wiring chamber (235) under the mounting seat (234), towing The coil winding (211) of the motor (2) is connected to the coil terminal (24) in the wiring chamber (235) of the motor housing (23), and the high voltage power terminal (51) extends through the mounting seat (234) Inside the wiring chamber (235) and electrically connected to the coil terminal (24).

10. An integrated integrated power system for a traction motor and an inverter according to the method of claim 9, characterized in that an annular skirt (251) is protruded from the outer end surface of an end cover (25), the annular skirt side

( 251 ) encloses a wiring chamber ( 235 ), and a mounting cover ( 26 ) is disposed on the annular skirt ( 251 ).

11. An integrated integrated powertrain system for a traction motor and an inverter according to the method of claim 10, wherein the low voltage signal interface (6) comprises a resolver signal terminal (61) and a motor temperature sensor terminal (62) The signal line (63) is taken from the resolver and the motor temperature sensor and connected to the resolver signal terminal (61) and the motor temperature sensor terminal (62), and connected at a high voltage power supply. Next to the mouth (5), a lead socket (14) is extended on the bottom surface of the inverter (1), and the lead socket (14) extends through the mounting seat (234) into the wiring chamber (235), and the resolver signal terminal ( 61) and the motor temperature sensor terminal (62) is inserted into the lead socket (14).

12. An integrated integrated power system for a traction motor and an inverter according to the method of claim 4 or 5 or 6, characterized in that a high voltage DC bus voltage input interface is also provided on the inverter housing (3).

(15) Interface with the external low voltage signal (16).

13. An integrated integrated power system for a traction motor and an inverter according to the method of claim 11, characterized in that there is a high pressure interlocking mechanism between the wiring chamber (235) and the mounting cover (26).

14. An integrated integrated power system for a traction motor and an inverter according to the method of claim 13 wherein said high voltage interlocking mechanism comprises a first connector (27) mounted in the wiring chamber (235). And a second connector (28) mounted on the mounting cover (26), the first connector (27) and the second when the mounting cover (26) is mounted on the top surface of the annular skirt (251) The connector (28) is plugged together, and the low voltage signal interface (6) further includes a high voltage interlock terminal (64), and the signal line (63) drawn from the first connector (27) interacts with the high voltage The lock terminal (64) is connected, and the high voltage interlock terminal (64) is inserted into the lead socket (14).