CN108407587B

CN108407587B - Power assembly system and car

Info

Publication number: CN108407587B
Application number: CN201810164080.2A
Authority: CN
Inventors: 赵清宁; 蒋荣勋; 苏伟; 陈国其
Original assignee: Beijing Electric Vehicle Co Ltd
Current assignee: Beijing Electric Vehicle Co Ltd
Priority date: 2018-02-27
Filing date: 2018-02-27
Publication date: 2020-03-06
Anticipated expiration: 2038-02-27
Also published as: CN108407587A

Abstract

The invention provides a power assembly system and an automobile, wherein the power assembly system comprises: the motor and the speed reducer are respectively fixedly connected with the inverter; the first end of the inverter is fixedly connected with the speed reducer, and the inverter is positioned above the output shaft of the speed reducer; the second end of the inverter is fixedly connected with the motor, the motor is fixedly connected with the speed reducer, and the first end and the second end are arranged adjacently; the water outlet of the inverter is arranged on the third end face, facing the output shaft of the speed reducer, of the inverter, and the water outlet is connected with the water inlet of the motor. In the embodiment of the invention, the installation position of the inverter is limited, compared with the existing installation mode of the inverter, the whole power assembly system occupies less whole vehicle space, the difficulty in designing and installing the vehicle is reduced, the production cost of the vehicle is reduced, the use space of a user is ensured, and the user has good use experience.

Description

Power assembly system and car

Technical Field

The invention relates to the technical field of automobile parts, in particular to a power assembly system and an automobile.

Background

With the rapid development of new energy automobile technology, people also select new energy automobiles as transportation tools more and more, and the requirements on the new energy automobiles are higher and higher.

The volume of present electric automobile's power assembly system is generally great, and the dc-to-ac converter arranges in the top of motor more especially, causes the power assembly to occupy more whole car space, and then makes arranging the degree of difficulty of other parts increase, needs the compression suitcase space to arrange sometimes for the structure of vehicle seems complicated, can increase the degree of difficulty of vehicle design and installation, increases the manufacturing cost of vehicle, and the use that the compression space also can influence the user is experienced simultaneously.

Disclosure of Invention

The technical problem to be solved by the embodiment of the invention is to provide a power assembly system and an automobile, and the power assembly system and the automobile are used for solving the problems that an inverter in the existing automobile power assembly system is arranged above a motor, so that the power assembly system occupies more space, the design and installation difficulty of the automobile is increased, and the production cost of the automobile is increased.

To solve the above technical problem, an embodiment of the present invention provides a power assembly system, including: the motor and the speed reducer are respectively fixedly connected with the inverter;

the first end of the inverter is fixedly connected with the speed reducer, and the inverter is positioned above the output shaft of the speed reducer;

the second end of the inverter is fixedly connected with the motor, the motor is fixedly connected with the speed reducer, and the first end and the second end are arranged adjacently;

the water outlet of the inverter is arranged on the third end face, facing the output shaft of the speed reducer, of the inverter, and the water outlet is connected with the water inlet of the motor.

Specifically, in the above-described powertrain system, the third end surface of the inverter is spaced from the output shaft by a predetermined distance.

Preferably, in the power train system as described above, a perpendicular distance between the output shaft and a fourth end surface of the inverter away from the output shaft is smaller than or equal to a perpendicular distance between the output shaft and an end surface of the motor away from the output shaft;

and the distance between the fifth end surface of the inverter, which is far away from the speed reducer, and the speed reducer is smaller than or equal to the distance between the end surface of the motor, which is far away from the speed reducer, and the speed reducer.

Specifically, as the power train system described above, the inverter includes: the direct current bus bar comprises a box body, and a direct current input connector, a direct current bus bar, an Insulated Gate Bipolar Transistor (IGBT for short) and an alternating current bus bar which are sequentially connected in series;

the direct current input connector is arranged on the sixth end face, far away from the motor, of the box body and is close to one side of the first end of the box body;

the direct-current busbar and the IGBT are arranged inside the box body;

the alternating current busbar is arranged in the junction box far away from the first end on the box body.

Specifically, as for the power assembly system, the inverter further comprises a top cover and a junction box cover which are arranged on the box body;

wherein the top cover is fixedly connected with the box body;

the junction box cover is connected with the junction box.

Preferably, in the power train system as described above, a dc bus capacitor is further connected in series between the dc bus and the IGBT.

Further, in the power assembly system, the direct current bus bar is provided with the direct current magnetic ring, and the direct current magnetic ring is fixedly connected with the box body;

an alternating current magnetic ring is arranged on the alternating current busbar and fixedly connected with the box body.

Specifically, in the power assembly system, the fixing brackets are respectively arranged between the dc magnetic ring and the ac magnetic ring and the box body, and the dc magnetic ring and the ac magnetic ring are respectively fixedly connected with the box body through the fixing brackets.

Preferably, in the drive train system as described above, the inverter further includes a drive plate, the drive plate is connected to the IGBT, and the drive plate is mounted on a side of the IGBT away from the third end surface.

Preferably, in the drive train system as described above, the inverter further includes: the shielding plate and the main control board are arranged on one side, away from the IGBT, of the driving board, and the driving board is connected with the main control board through a signal wire harness.

Specifically, as for the power assembly system, a signal connector is further arranged on the sixth end face of the box body, and the signal connector is fixedly connected with the main control board.

Specifically, according to the power assembly system, the motor signal adapter is further arranged in the junction box and connected with the main control board.

Preferably, in the power assembly system as described above, the inverter further includes two cooling water channels disposed on the third end surface and parallel to the sixth end surface, the cooling water channels are conducted in a direction away from the first end, and side walls of the two cooling water channels are respectively communicated with the IGBT;

the cooling water channel close to the sixth end surface is communicated with a water inlet of the inverter, and the water inlet is vertical to the sixth end surface;

the cooling water channel far away from the sixth end face is communicated with a water outlet of the inverter, and the water outlet is perpendicular to the third end face.

Specifically, as for the power assembly system, bowl-shaped plugs are arranged at two ends of the cooling water channel, and the bowl-shaped plugs and the cooling water channel are pressed and sealed.

Embodiments of the present invention also provide an automobile including the powertrain system described above.

Compared with the prior art, the power assembly system and the automobile provided by the embodiment of the invention at least have the following beneficial effects:

in the embodiment of the invention, the power assembly system comprises an inverter, and a motor and a speed reducer which are fixedly connected with the inverter respectively; the first end of the inverter is fixedly connected with the speed reducer, the second end adjacent to the first end is fixedly connected with the motor, and the inverter is located above the output shaft of the speed reducer. This kind of setting limits the mounted position of dc-to-ac converter between motor and reduction gear, make power assembly system's compact structure, compare in the current mounting means of arranging the dc-to-ac converter in the top of motor make the whole car space that whole power assembly system occupy still less, make other spare parts of car have more choice spaces at the in-process of arranging, the degree of difficulty when being favorable to reducing automobile design and installation, and then reduce the manufacturing cost of car, also be favorable to guaranteeing user's usage space simultaneously, make the user have good use and experience.

The water outlet of the inverter is arranged on the third end face, facing the output shaft of the speed reducer, of the inverter, and the water outlet is connected with the water inlet of the motor. The distance between the water outlet of the inverter and the water inlet of the motor is shortened, and the cooling liquid flowing out of the inverter flows into a cooling system of the motor, so that the length of the cooling water pipe is reduced, and the occupied space and the production cost are favorably reduced.

Drawings

FIG. 1 is a schematic view of a powertrain according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view A-A of the inverter of FIG. 1 in accordance with an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view B-B of the inverter of FIG. 1 in accordance with an embodiment of the present invention;

fig. 4 is a schematic top view of an inverter according to an embodiment of the present invention with the top cover and the junction box cover removed;

fig. 5 is a schematic bottom view of an inverter according to an embodiment of the present invention.

[ description of reference ]

1. An inverter; 2. a speed reducer; 201. an output shaft; 3. a motor; 4. a box body; 5. a DC input connector; 6. a direct current bus bar; 7. an IGBT; 8. an alternating current bus bar; 9. a junction box; 10. a top cover; 11. a junction box cover; 12. a DC bus capacitor; 13. a DC magnetic ring; 14. an alternating current magnetic ring; 15. a drive plate; 16. a shielding plate; 17. a main control board; 18. a signal connector; 19. a motor signal adapter; 20. a cooling water channel; 21. a water inlet; 22. a water outlet; 23. a bowl-shaped plug.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

Referring to fig. 1 and 2, a preferred embodiment of the present invention provides a powertrain system comprising: the system comprises an inverter 1, and a motor 3 and a speed reducer 2 which are fixedly connected with the inverter 1 respectively;

wherein, the first end of the inverter 1 is fixedly connected with the reducer 2, and the inverter 1 is positioned above the output shaft 201 of the reducer 2;

the second end of the inverter 1 is fixedly connected with the motor 3, the motor 3 is fixedly connected with the speed reducer 2, and the first end and the second end are arranged adjacently;

the water outlet 22 of the inverter 1 is disposed on a third end surface of the output shaft 201 of the inverter 1 facing the speed reducer 2, and the water outlet 22 is connected to a water inlet of the motor 3.

The power assembly system comprises an inverter 1, a motor 3 and a speed reducer 2 which are fixedly connected with the inverter 1 respectively; the first end of the inverter 1 is fixedly connected with the speed reducer 2 through a bolt, the second end adjacent to the first end is fixedly connected with the motor 3 through a bolt, and the inverter 1 is located above the output shaft 201 of the speed reducer 2. This kind of setting limits inverter 1's mounted position between motor 3 and reduction gear 2, make the compact structure of power assembly system, compare in the current mounting means of arranging the inverter in the top of motor and make the whole car space that whole power assembly system occupy still less, make other spare parts of car have more choice spaces at the in-process of arranging, the degree of difficulty when being favorable to reducing automobile design and installation, and then reduce the manufacturing cost of car, also be favorable to guaranteeing user's usage space simultaneously, make the user have good use experience.

The water outlet 22 of the inverter 1 is disposed on a third end surface of the output shaft 201 of the inverter 1 facing the speed reducer 2, and the water outlet 22 is connected to a water inlet of the motor 3. The distance between the water outlet 22 of the inverter 1 and the water inlet of the motor 3 is shortened, and the length of a cooling water pipe is reduced when the cooling liquid flowing out of the inverter 1 flows into a cooling system of the motor 3, so that the occupied space and the production cost are reduced.

Specifically, as in the above-described powertrain system, the third end surface of the inverter 1 is spaced from the output shaft 201 by a predetermined distance.

In the embodiment of the present invention, a preset distance is provided between the third end surface of the inverter 1 and the output shaft 201, that is, a certain safety distance is maintained between the inverter 1 and the output shaft 201 of the speed reducer 2, so as to prevent the inverter 1 and the output shaft 201 from directly contacting to damage the output shaft 201 and/or the inverter 1, which affects the normal operation of the speed reducer 2 and/or the inverter 1, and ensure the normal service life of the powertrain system.

Preferably, as for the power train system, the vertical distance between the output shaft 201 and the fourth end surface of the inverter 1 away from the output shaft 201 is smaller than or equal to the vertical distance between the output shaft 201 and the end surface of the motor 3 away from the output shaft 201;

the distance between the fifth end surface of the inverter 1 away from the speed reducer 2 and the speed reducer 2 is less than or equal to the distance between the end surface of the motor 3 away from the speed reducer 2 and the speed reducer 2.

In the embodiment of the invention, the position of the inverter 1 is further limited, so that the space occupied by the inverter 1 and the whole power assembly system is limited within a certain range, more selection spaces are provided for the arrangement of other parts of the automobile, the difficulty in designing and installing the automobile is reduced, the production cost of the automobile is reduced, the use space of a user is ensured, and the user has good use experience.

Referring to fig. 3 to 5, in an embodiment of the present invention, the inverter 1 includes: the direct current bus bar comprises a box body 4, and a direct current input connector 5, a direct current bus bar 6, an IGBT7 and an alternating current bus bar 8 which are sequentially connected in series;

the direct current input connector 5 is arranged on the sixth end face, far away from the motor 3, of the box body 4 and close to one side of the first end of the box body 4;

the direct-current busbar 6 and the IGBT7 are arranged inside the box body 4;

the alternating current busbar 8 is arranged inside the junction box 9 far away from the first end on the box body 4.

In the embodiment of the invention, the inverter 1 comprises a direct current input connector 5, a direct current bus bar 6, an insulated gate bipolar transistor IGBT7 and an alternating current bus bar 8 which are sequentially connected in series, wherein the direct current input connector 5 is used for connecting a direct current power supply and the direct current bus bar 6, direct current input by the direct current power supply reaches an IGBT7 through the direct current input connector 5 and the direct current bus bar 6, the direct current outputs alternating current to the alternating current bus bar 8 through the conversion of the IGBT7, and a driving motor on an automobile obtains energy through the connection with the alternating current bus bar 8 to support the automobile to run.

The direct current input connector 5 is arranged on the sixth end face of the box body 4 of the inverter 1 and is convenient to be connected with a direct current power supply;

the AC busbar 8 is independently arranged in the junction box 9, so that an installation or working personnel can independently carry out AC line installation without exposing the whole inverter 1, and meanwhile, the safety of the installation or working personnel is protected.

Specifically, as described above in the powertrain system, the inverter 1 further includes the top cover 10 and the junction box cover 11 mounted on the box body 4;

wherein, the top cover 10 is fixedly connected with the box body 4;

the junction box cover 11 is connected with the junction box 9.

In the embodiment of the invention, the inverter 1 comprises the top cover 10 fixedly connected with the box body 4, and the top cover 10 arranged on the box body 4 and the box body 4 form a closed structure, so that various parts in the box body 4 are reduced from contacting with the outside, the safety of the parts in the box body 4 is favorably protected, and meanwhile, as part of the parts in the box body 4 are provided with current, the safety of outside personnel or electric appliances is favorably protected.

The junction box 9 is separately provided with the junction box cover 11, when the wiring is needed, the junction box cover 11 is opened for wiring, and the parts in the box body 4 are not required to be completely exposed, so that the safety of the parts in the box body 4 and workers is protected; when wiring is not needed, the closed structure formed by the junction box cover 11 and the junction box 9 isolates and protects the alternating current busbar 8, the alternating current busbar 8 is prevented from being damaged by external factors, and meanwhile, the current on the alternating current busbar 8 is prevented from damaging electrical appliances or workers.

Preferably, as for the power train system, a dc bus capacitor 12 is further connected in series between the dc bus bar 6 and the IGBT 7.

In the embodiment of the present invention, the dc bus capacitor 12 connected in series between the dc bus 6 and the IGBT7 can protect the circuit of the inverter 1 from the impact of the instantaneous peak of the dc power supply, and also has a filtering function, so that the dc power entering the IGBT7 is smoother, and the alternating ripple in the current is prevented from affecting the switching of the IGBT 7. Direct current bus capacitor 12 sets up side by side with IGBT7 in the direction along second end to sixth terminal surface, is favorable to reducing the circuit winding, guarantees that the circuit arranges simply, neat.

Further, in the power assembly system, the direct current magnetic ring 13 is arranged on the direct current bus bar 6, and the direct current magnetic ring 13 is fixedly connected with the box body 4;

an alternating current magnetic ring 14 is arranged on the alternating current busbar 8, and the alternating current magnetic ring 14 is fixedly connected with the box body 4.

In the embodiment of the invention, the direct current magnetic ring 13 is arranged on the direct current bus bar 6, so that the electromagnetic radiation generated in the direct current bus bar 6 can be reduced; an alternating current magnetic ring 14 is arranged on the alternating current bus bar 8, so that electromagnetic radiation generated in the alternating current bus bar 8 can be reduced; the electromagnetic radiation generated by the whole inverter circuit is reduced by arranging the direct current magnetic ring 13 and the alternating current magnetic ring 14, the influence of the electromagnetic radiation on electric appliances inside the inverter 1 is reduced, the normal work of the inverter 1 is ensured, the electromagnetic compatibility grade of the inverter 1 and a power assembly system is improved, and the requirement of an automobile on the electromagnetic compatibility grade is met. The dc magnetic ring 13 and the ac magnetic ring 14 are both fixedly connected to the case 4, which is beneficial to preventing the dc magnetic ring 13 or the ac magnetic ring 14 from moving to affect the internal circuit of the inverter 1.

Specifically, as described above, in the power assembly system, fixing brackets are disposed between the dc magnetic ring 13 and the ac magnetic ring 14 and the box 4, and the dc magnetic ring 13 and the ac magnetic ring 14 are fixedly connected to the box 4 through the fixing brackets.

In the embodiment of the invention, the fixed support is arranged to enable the direct current magnetic ring 13 and the alternating current magnetic ring 14 to have certain fixed positions with the box body 4, so that the direct current magnetic ring 13 and the alternating current magnetic ring 14 can be accurately installed, and meanwhile, the fixed support is arranged to enable the direct current magnetic ring 13 and the alternating current magnetic ring 14 to be more conveniently and conveniently installed, thereby being beneficial to improving the production efficiency.

Preferably, as in the power train system described above, the inverter 1 further includes the driving board 15, the driving board 15 is connected to the IGBT7, and the driving board 15 is mounted on the side of the IGBT7 away from the third end surface.

In the embodiment of the invention, the inverter 1 further comprises a drive board 15 connected with the IGBT7, the drive board 15 can control the IGBT7 to perform switching operation according to the control signal, so that the ac frequency and the current of the ac power output by the IGBT7 can meet the requirements of the electrical equipment, and the drive board 15 also has a protection effect on the IGBT7, thereby preventing the IGBT7 from being damaged due to overload operation and affecting the normal operation of the inverter 1 and the powertrain system.

Preferably, as the power train system described above, the inverter 1 further includes: and the driving board 15 is connected with the main control board 17 through a signal wire harness, and the shielding board 16 and the main control board 17 are arranged on one side of the driving board 15, which is far away from the IGBT 7.

In the embodiment of the present invention, the inverter 1 further includes: the shielding plate 16 and the main control board 17, wherein the shielding plate 16 has a shielding effect, and can shield the electromagnetic radiation generated in the circuit where the IGBT7 is located, so as to ensure that the main control board 17 is not affected by the electromagnetic radiation, and provide a supporting effect for the installation of the main control board 17. The main control board 17 is installed in the inside of the inverter 1, the function of the whole vehicle controller is integrated, the work of the whole vehicle controller which is independently arranged on a vehicle is reduced, the drive board 15 is connected with the main control board 17 in the inside of the inverter 1 through a signal wire harness, the wire harness length between the inverter and the whole vehicle controller shell in the original vehicle structure are reduced, the production cost is favorably reduced, meanwhile, the main control board 17 is installed in the inside of the inverter 1, the main control board 17 and the main control board 17 are both protected by the box body 4 when being connected with the drive board 15, and the reliability of a power assembly system is favorably improved.

Specifically, as for the power assembly system, the sixth end surface of the box 4 is further provided with a signal connector 18, and the signal connector 18 is fixedly connected with the main control board 17.

In the embodiment of the present invention, the sixth end surface of the box 4 is further provided with a signal connector 18, so as to receive various signals in the automobile, and the signal connector 18 is fixedly connected with the main control board 17, so as to receive various signals in the automobile through the signal connector 18 and transmit the signals to the main control board 17 for processing, thereby implementing the function of controlling the whole automobile, ensuring the normal operation of the power assembly system and the automobile, and especially, the main control board 17 drives and controls the IGBT7 through the drive board 15 according to the signals received by the signal connector 18.

Specifically, as for the power assembly system, a motor signal adapter 19 is further disposed in the junction box 9, and the motor signal adapter 19 is connected to the main control board 17.

In the embodiment of the invention, the motor signal adapter 19 is connected with the main control board 17, and the motor signal adapter 19 is used for receiving the rotation signal of the motor 3 and the stator temperature signal and transmitting the signals to the main control board 17, so that the main control board 17 can perform real-time control according to the condition of the motor 3, and the normal operation of the power assembly system is ensured. The motor signal adapter 19 is arranged in the junction box 9, so that the connection with the motor 3 and the maintenance are convenient.

Referring to fig. 2 and 5, in another embodiment of the present invention, the inverter 1 further includes two cooling water passages 20 disposed on the third end surface in parallel with the sixth end surface, the cooling water passages 20 are communicated in a direction away from the first end, and side walls of the two cooling water passages 20 are respectively communicated with the IGBTs 7;

the cooling water channel 20 close to the sixth end surface is communicated with a water inlet 21 of the inverter 1, and the water inlet 21 is vertical to the sixth end surface;

the cooling water channel 20 far away from the sixth end surface is communicated with a water outlet 22 of the inverter 1, and the water outlet 22 is perpendicular to the third end surface.

In the embodiment of the present invention, the two cooling water channels 20 on the inverter 1 are arranged parallel to the sixth end surface and are conducted in the direction away from the first end, the side walls of the two cooling water channels 20 are respectively communicated with the IGBT7, and the two cooling water channels 20 are respectively communicated with the water inlet 21 and the water outlet 22 of the inverter 1, so that the cooling liquid can flow between the cooling water channels 20 and the IGBT7 to cool the IGBT 7; meanwhile, the cooling water channel 20 is directly formed by die casting and is opened, the cost of sealing the cover plate is reduced, water resistance is reduced, uniform flow of cooling liquid is guaranteed, and the cooling reliability of the IGBT7 is improved.

The water inlet 21 is disposed perpendicular to the sixth end surface for facilitating connection with a water inlet pipe, so that the cooling liquid enters the cooling system formed by the cooling water channel 20 and the IGBT 7.

The water outlet 22 is perpendicular to the third end surface and is convenient to be connected with the water inlet of the motor 3, so that the distance between the water outlet 22 of the inverter 1 and the water inlet of the motor 3 is shortened, cooling liquid flowing out of the inverter 1 flows into a cooling system of the motor 3, the length of a cooling water pipe is reduced, and occupied space and production cost are reduced.

Specifically, as for the power assembly system, the bowl-shaped plugs 23 are arranged at the two ends of the cooling water channel 20, and the bowl-shaped plugs 23 and the cooling water channel 20 are pressed and sealed.

In the embodiment of the invention, the bowl-shaped plugs 23 which are press-fitted and sealed with the cooling water channel 20 through interference fit are arranged at the two ends of the cooling water channel 20, so that the installation is simple and convenient, the leakage of cooling liquid can be effectively prevented, the production cost is reduced, and the reliability of the cooling system is improved.

In the embodiment of the invention, the automobile comprises the power assembly system, the space occupied by the inverter 1 and the whole power assembly system is limited within a certain range by limiting the position of the inverter 1, more selection spaces are provided for the arrangement of other parts of the automobile, the difficulty in designing and installing the automobile is favorably reduced, the production cost of the automobile is further reduced, the use space of a user is favorably ensured, and the user has good use experience; the inverter 1 is internally provided with a main control board 17 and is respectively connected with the drive board 15, the motor signal adapter 19 and the signal connector 18, so that the whole vehicle control function is realized, the cost of independently arranging a whole vehicle controller is reduced, and the reliability of the whole vehicle control is improved; the inverter 1 is also internally provided with a separation plate, a direct current magnetic ring 13 and an alternating current magnetic ring 14 to inhibit electromagnetic radiation generated in a circuit, so that the normal work of the inverter 1 is ensured, and the electromagnetic compatibility grade of the inverter 1 and a power assembly system is improved; the cooling water channel 20 is directly die-cast on the inverter 1 and is sealed by the bowl-shaped plug 23 after being opened, and the side wall of the cooling water channel 20 is communicated with the IGBT7, so that the water resistance can be reduced, the IGBT7 can be effectively cooled, and the reliability of a cooling system is improved.

Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

It is further noted that, herein, relational terms such as first and second, and the like may be 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. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A powertrain system, comprising: the motor-driven generator comprises an inverter (1), and a motor (3) and a speed reducer (2) which are fixedly connected with the inverter (1) respectively;

wherein, the first end of the inverter (1) is fixedly connected with the speed reducer (2), and the inverter (1) is positioned above the output shaft (201) of the speed reducer (2);

the second end of the inverter (1) is fixedly connected with the motor (3), the motor (3) is fixedly connected with the speed reducer (2), and the first end and the second end are arranged adjacently;

a water outlet (22) of the inverter (1) is arranged on a third end face, facing the output shaft (201) of the speed reducer (2), of the inverter (1), and the water outlet (22) is connected with a water inlet of the motor (3);

wherein the vertical distance between the output shaft (201) and the fourth end surface of the inverter (1) far away from the output shaft (201) is smaller than or equal to the vertical distance between the output shaft (201) and the end surface of the motor (3) far away from the output shaft (201);

the distance between a fifth end face, far away from the speed reducer (2), of the inverter (1) and the speed reducer (2) is smaller than or equal to the distance between the end face, far away from the speed reducer (2), of the motor (3) and the speed reducer (2).

2. A powertrain system according to claim 1, characterized in that a third end surface of the inverter (1) is spaced from the output shaft (201) by a preset distance.

3. A powertrain system according to claim 1, characterized in that the inverter (1) comprises: the device comprises a box body (4), and a direct current input connector (5), a direct current bus bar (6), an Insulated Gate Bipolar Transistor (IGBT) (7) and an alternating current bus bar (8) which are sequentially connected in series;

the direct current input connector (5) is arranged on a sixth end face, far away from the motor (3), of the box body (4) and close to one side of the first end of the box body (4);

the direct-current busbar (6) and the IGBT (7) are arranged inside the box body (4);

the alternating current busbar (8) is arranged inside the junction box (9) far away from the first end on the box body (4).

4. A powertrain system according to claim 3, characterized in that the inverter (1) further comprises a top cover (10) mounted on the case (4) and a junction box cover (11);

wherein the top cover (10) is fixedly connected with the box body (4);

the junction box cover (11) is connected with the junction box (9).

5. A powertrain system according to claim 3, characterized in that a dc bus capacitor (12) is also connected in series between the dc bus bar (6) and the IGBT (7).

6. The power assembly system as claimed in claim 5, wherein the DC bus bar (6) is provided with a DC magnetic ring (13), and the DC magnetic ring (13) is fixedly connected with the box body (4);

an alternating current magnetic ring (14) is arranged on the alternating current busbar (8), and the alternating current magnetic ring (14) is fixedly connected with the box body (4).

7. The powertrain system according to claim 6, characterized in that a fixing bracket is arranged between the dc magnetic ring (13) and the ac magnetic ring (14) and the box body (4), and the dc magnetic ring (13) and the ac magnetic ring (14) are fixedly connected to the box body (4) through the fixing brackets.

8. A powertrain system according to claim 3, characterized in that the inverter (1) further comprises a drive plate (15), the drive plate (15) being connected with the IGBT (7), and the drive plate (15) being mounted on a side of the IGBT (7) remote from the third end face.

9. The powertrain system of claim 8, characterized in that the inverter (1) further comprises: the shielding plate (16) and the main control board (17) are arranged on one side, far away from the IGBT (7), of the driving board (15), and the driving board (15) is connected with the main control board (17) through a signal wire harness.

10. The powertrain system of claim 9, characterized in that a signal connector (18) is further disposed on the sixth end surface of the box body (4), and the signal connector (18) is fixedly connected with the main control board (17).

11. The powertrain system according to claim 9, characterized in that a motor signal adapter (19) is further arranged in the junction box (9), and the motor signal adapter (19) is connected with the main control board (17).

12. A powertrain system according to claim 3, wherein the inverter (1) further includes two cooling water passages (20) provided on the third end surface in parallel with the sixth end surface, the cooling water passages (20) communicating in a direction away from the first end, side walls of the two cooling water passages (20) communicating with the IGBTs (7), respectively;

wherein the cooling water channel (20) close to the sixth end surface is communicated with a water inlet (21) of the inverter (1), and the water inlet (21) is arranged perpendicular to the sixth end surface;

the cooling water channel (20) far away from the sixth end face is communicated with the water outlet (22) of the inverter (1), and the water outlet (22) is perpendicular to the third end face.

13. The powertrain system according to claim 12, characterized in that bowl-shaped plugs (23) are provided at both ends of the cooling water channel (20), and the bowl-shaped plugs (23) are press-fitted and sealed with the cooling water channel (20).

14. A motor vehicle comprising a powertrain system as claimed in any one of claims 1 to 13.