CN116032112A - Dual-motor inverter, driving unit and hybrid vehicle - Google Patents

Abstract

The invention discloses a dual-motor inverter, a driving unit and a hybrid vehicle, comprising: the power inverter comprises a main box body 1, an upper cover 3 and a bottom shell 4, wherein a cooling structure is arranged in the main box body 1, a driving motor power module 5 and a generator power module 6 are arranged on the main box body 1, an upper box body 2 is arranged between the main box body 1 and the upper cover 3, a control board 15 is arranged in a shielding area between the upper box body 2 and the upper cover 3, an electromagnetic filter assembly 14 and a discharge resistor 22 are arranged on the same side of a bus capacitor assembly 13, and radiation generated by various power modules, filters, capacitors and the like in the inverter is shielded with a controller. The invention ensures that the wiring harness is reasonable in wiring, is not easy to scratch the wiring harness and is subjected to electromagnetic interference, improves the reliability of the inverter, and avoids the structural mode of a plurality of connectors and wiring harnesses in the prior art.

Description

Dual-motor inverter, driving unit and hybrid vehicle

Technical Field

The invention relates to a double-motor inverter, a driving unit and a hybrid electric vehicle, and belongs to the technical field of AC/DC power conversion and output equipment and hybrid electric vehicles.

Background

Compared with a pure electric vehicle, the hybrid electric vehicle needs to arrange an engine and an electric drive system in a cabin (engine cabin), so that for a transverse vehicle type, the width (the Y direction of the whole vehicle) of the whole set of power train becomes a key factor of whether the whole vehicle can be smoothly arranged in the cabin, and the integrated design and the reduction of the axial width become a great trend of development. However, most of the integration schemes are designed to be developed preferentially from the internal arrangement angle of the inverter, and the whole vehicle arrangement is not considered preferentially, so that the inverter is generalized in different vehicle types and encounters resistance. In order to save the cost, the size of the inverter is further reduced, the electrical connection between the inverter and the motor is directly connected by using copper bars as much as possible, and the design of the connector and the wire harness increases the space occupation and the cost, which is a problem of many inverters at present. Finally, compared with the fuel engine, the electric drive system has a plurality of internal electronic components, how to reduce electromagnetic interference emitted outwards and resist external interference is also one of important matters of inverter design, and part of inverters are provided with electromagnetic filters, but motor rotation and temperature sensor signal wires are usually positioned on the outer side of the whole system, so that electromagnetic radiation emitted outwards by the electric drive system is increased, and two types of signals are unnecessarily interfered in the process of being transmitted to the inverters by the motor.

Disclosure of Invention

The invention aims to provide a double-motor inverter, which firstly aims to solve the technical problems of shielding radiation generated by various power modules, filters, capacitors and the like in the inverter from a controller, secondly also aims to provide a heat dissipation function for the power modules, the capacitors, the filters and a discharge resistor, finally also aims to ensure reasonable arrangement of parts and wiring harness routing, improve the reliability of the inverter and solve the defects existing in the prior art.

The invention provides the following scheme:

a dual motor inverter comprising: the main tank body 1, be used for closing upper cover 3 at top and be used for the drain pan 4 of fixed bottom, be provided with cooling structure in the main tank body 1, its characterized in that, install driving motor power module 5 and generator power module 6 on the main tank body 1, install driving motor power module drive plate 7 and generator power module drive plate 8 respectively on driving motor power module 5 and generator power module 6, namely: the connection mode of the generator power module 6 is the same as that of the driving motor power module 5, an upper box body 2 is arranged between a main box body 1 and an upper cover 3, a shielding area is formed between the upper box body 2 and the upper cover 3, a control board 15 is arranged in the shielding area, a bus capacitor assembly 13, an electromagnetic filter assembly 14 and a discharge resistor 22 are fixedly connected to the main box body 1, the electromagnetic filter assembly 14 and the discharge resistor 22 are arranged on the same side of the bus capacitor assembly 13, the bus capacitor assembly 13 and the driving motor power module 5 are electrically connected through a driving motor side alternating current copper bar, and the electromagnetic filter assembly 14 and the bus capacitor assembly 13 are electrically connected and are electrically connected with a direct current high-voltage connector 16 through a copper bar 1401.

Further, the cooling structure includes: the main box water pipe 103 and the outlet pipe 21 that links to each other with main box water pipe 103 still include main box middle part water course 102 and main box front portion water course 101, main box front portion water course links to each other with inlet tube 20, all are provided with the opening that is used for with the pencil embeds on main box 1 and last box 2.

Further, a main tank front water channel cover plate 104 is provided above the main tank front water channel 101, and a main tank middle water channel cover plate 105 is provided on the main tank middle water channel 102.

Further, the main tank front water channel cover plate 104 and the main tank middle water channel cover plate 105 are fixed on the main tank 1 through welding, and the water inlet pipe 20 and the water outlet pipe 21 are mounted on the main tank 1 through interference fit.

Further, the control board 15 is provided with an insert for connecting a low voltage harness and a plug board, and specifically includes: the power module control board 50pin plug-in 1501, the whole inverter harness plug-in 1502, the power module driving board-to-board plug-in 1503, the rotary transformer and temperature sensor harness plug-in 1504, the two-in-one plug-in 1505 for the current sensor and the current sensor of the driving motor and the high-voltage interlocking plug-in 1506.

Further, the three-phase alternating current wire holder assembly 23 is further included, and a driving motor alternating current connection copper bar 2301, a generator alternating current connection copper bar 2302, an inverter side beam plug 2303 and a motor side beam plug 2304 are arranged on the three-phase alternating current wire holder assembly 23.

Further, the bus capacitor assembly 13 includes: dc copper bar 1301, discharge resistor copper bar 1302, driving motor side ac copper bar 1303, wherein: the dc copper bar 1301 is electrically connected to the filter, the discharge resistor copper bar 1302 is electrically connected to the discharge resistor 22 via a wire harness, the driving motor side ac copper bar 1303 is electrically connected to the driving motor power module 5, and the generator side ac copper bar 1304 is electrically connected to the generator power module 6.

Further, a copper bar 1401 is disposed on the electromagnetic filter assembly 14, the electromagnetic filter assembly 14 is electrically connected with the dc high voltage connector 16 through the copper bar 1401, a copper column 1402 with internal threads is further disposed on the electromagnetic filter assembly 14, the electromagnetic filter assembly 14 is electrically connected with the capacitor dc copper bar 1301 through the copper column 1402, a magnetic ring 1403 is disposed on the periphery of the copper column 1402, and a first cover plate 1404 and a second cover plate 1405 are further disposed on the electromagnetic filter assembly 14.

The driving unit comprises a generator and a driving motor, the driving unit is also provided with the double-motor inverter, the inverter is electrically connected with the driving motor through a driving motor alternating current connection copper bar 2301, and the driving motor alternating current connection copper bar 2301 and the generator alternating current connection copper bar 2302 on the three-phase alternating current wiring seat assembly 23 are respectively connected with the driving motor and the generator.

A hybrid vehicle is provided with a drive unit.

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

the invention shields the radiation generated by various power modules, filters, capacitors and the like in the inverter from the controller, the main box body, the upper box body and the bottom shell form a high-voltage isolation area, the main high-voltage components of the inverter are arranged in the two layers, the power module of the driving motor and the power module of the generator are arranged on the main box body in parallel, the main box body not only provides support and positioning for the installation of the power module, the capacitors, the filters and the like, but also isolates the electromagnetic filters from the power module through the structure of the main box body, thereby playing a role of shielding and avoiding the influence of the electromagnetic radiation of the filters on the operation of the power module; the control panel is fixed on last box, and the action of last box is similar on the main tank, except fixed control panel, goes up the box and has also played the effect of shielding plate, blocks that the high-pressure radiation of power module and drive plate transmits to on the control panel.

The cooling liquid enters the front water channel of the main box body through the water inlet pipe, then enters the water channel of the main box body after flowing out of the power module of the driving motor, enters the middle water channel of the main box body, and then enters the water channel of the power module of the generator, and finally flows out of the water outlet pipe through the water channel of the main box body, thereby completing the heat dissipation process of the inverter. Meanwhile, as the filter and the capacitor assembly are arranged on one side of the inverter, the power module is arranged on the other side, and the interference of radiation generated by the filter on the power module is isolated through the metal flat plate structure on the main box body, the good EMC effect is achieved, and a higher EMC level can be realized.

The parts in the double-motor inverter adopt a reasonable arrangement mode, and the wiring board of the control board is also reasonably arranged, so that the wiring harness is reasonable in wiring, the wiring harness is not easy to scratch and is subjected to electromagnetic interference, the reliability of the inverter is improved, and the structural mode of a plurality of connectors and wiring harnesses in the prior art is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exploded structural view of a two-motor inverter.

Fig. 1A is one of the partial enlarged views of fig. 1.

Fig. 1B is a second enlarged view of a portion of fig. 1.

Fig. 1C is a third enlarged view of a portion of fig. 1.

Fig. 1D is a fourth partial enlarged view of fig. 1.

Fig. 1E is a fifth partial enlarged view of fig. 1.

Fig. 2 is a combined structural diagram of a two-motor inverter.

Fig. 2A is a partial enlarged view of fig. 2.

Fig. 3 is a block diagram of a dual motor inverter cooling system.

Fig. 4 is a block diagram of a dual motor inverter cooling system from another perspective.

Fig. 5 is a bottom view of fig. 4.

Fig. 6 is a block diagram of a capacitor assembly.

Fig. 7 is a block diagram of an electromagnetic filter assembly.

Fig. 8 is a structural diagram of the control board.

Fig. 9 is an assembly view (perspective) of a three-phase ac receptacle assembly and a two-motor inverter.

Fig. 10 is a partial enlarged view of fig. 9.

Fig. 11 is an assembly view (side view) of a three-phase ac receptacle assembly and a two-motor inverter.

Fig. 12 is a partial enlarged view of fig. 11.

Fig. 13 is a view showing an initial state of the capacitor connection terminal of the capacitor assembly.

Fig. 14 is a diagram showing an assembled state of the capacitor connection terminal of the capacitor assembly.

Fig. 15 is an assembly view (side view) of a prior art two-motor inverter with a generator and a drive motor.

Fig. 16 is an assembly view (perspective) of a prior art two-motor inverter with a generator and a drive motor.

Fig. 17 is an assembly view (side view) of the dual motor inverter of the present invention with a generator and a drive motor.

Fig. 18 is an assembly view (perspective) of the dual motor inverter of the present invention with a generator and a drive motor.

Fig. 19 is a cross-sectional view of a dual motor inverter of the present invention with a generator and a drive motor.

Fig. 19A is one of the partial enlarged views of fig. 19.

Fig. 19B is a second enlarged view of a portion of fig. 19.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Reference numerals illustrate: the main box body 1, the upper box body 2, the upper cover 3, the bottom shell 4, the driving motor power module 5, the generator power module 6, the driving motor power module driving plate 7, the generator power module driving plate 8, the driving motor current sensor 9, the generator current sensor 10, the driving motor alternating current busbar wire holder assembly 11, the generator alternating current busbar wire holder assembly 12, the busbar capacitor assembly 13, the electromagnetic filter assembly 14, the control panel 15, the direct current high-voltage connector 16, the low-voltage connector 17, the alternating current connection cover plate sealing ring 18, the three-phase alternating current connection cover plate 19, the water inlet pipe 20, the water outlet pipe 21, the discharge resistor 22 and the three-phase alternating current wire holder assembly 23.

The main tank front water channel 101, the main tank middle water channel 102, the main tank water supply pipe 103, the main tank front water channel cover plate 104, the main tank middle water channel cover plate 105, the direct current copper bar 1301, the discharge resistance copper bar 1302, the driving motor side alternating current copper bar 1303, the generator side alternating current copper bar 1304, the copper bar 1401, the copper column 1402, the magnetic ring 1403, the first cover plate 1404 and the second cover plate 1405.

The power module control board 50pin plug-in 1501, the whole inverter harness plug-in 1502, the power module driving board-to-board plug-in 1503, the rotary transformer and temperature sensor harness plug-in 1504, the two-in-one plug-in 1505 for the current sensor and the current sensor of the driving motor and the high-voltage interlocking plug-in 1506.

The system comprises a rotary transformer 1601, a control board rotary transformer and temperature signal connector 1602, a three-phase wire holder low-voltage switching part 1603 and a conventional product rotary transformer position 1604.

The drive motor ac connection copper bar 2301, the generator ac connection copper bar 2302, the inverter side harness plug 2303, and the motor side harness plug 2304.

The invention provides a double-motor inverter, comprising: the main box 1, be used for closing upper cover 3 at top and be used for the drain pan 4 of fixed bottom, be provided with cooling structure in the main box 1, install driving motor power module 5 and generator power module 6 on the main box 1, install driving motor power module drive plate 7 and generator power module drive plate 8 on driving motor power module 5 and generator power module 6 respectively, namely: the connection mode of the generator power module 6 is the same as that of the driving motor power module 5, an upper box body 2 is arranged between a main box body 1 and an upper cover 3, a shielding area is formed between the upper box body 2 and the upper cover 3, a control board 15 is arranged in the shielding area, a bus capacitor assembly 13, an electromagnetic filter assembly 14 and a discharge resistor 22 are fixedly connected to the main box body 1, the electromagnetic filter assembly 14 and the discharge resistor 22 are arranged on the same side of the bus capacitor assembly 13, the bus capacitor assembly 13 and the driving motor power module 5 are electrically connected through a driving motor side alternating current copper bar, and the electromagnetic filter assembly 14 is electrically connected with the bus capacitor assembly 13 and is electrically connected with a direct current high-voltage connector 16 through a copper bar 1401.

Preferably, the cooling structure includes: the main box water pipe 103 and the outlet pipe 21 that links to each other with main box water pipe 103 still include main box middle part water course 102 and main box front portion water course 101, and main box front portion water course links to each other with inlet tube 20, all is provided with the opening that is used for with the pencil embeds on main box 1 and last box 2.

Preferably, a main tank front water channel cover plate 104 is arranged above the main tank front water channel 101, and a main tank middle water channel cover plate 105 is arranged above the main tank middle water channel 102.

Preferably, the main housing front waterway cover 104 and the main housing middle waterway cover 105 are fixed to the main housing 1 by welding, and the inlet pipe 20 and the outlet pipe 21 are mounted to the main housing 1 by interference fit.

Preferably, an insert for connecting a low voltage harness and for a plug board is provided at the control board 15, and specifically includes: the power module control board 50pin plug-in 1501, the whole inverter wire harness plug-in 1502, the power module driving board-to-board plug-in 1503, the rotary transformer and temperature sensor wire harness plug-in 1504, the two-in-one plug-in 1505 for the current sensor of the driving motor and the current sensor of the power generator and the high-voltage interlocking plug-in 1506;

preferably, the three-phase alternating current wire holder assembly 23 is further included, and a driving motor alternating current connection copper bar 2301, a generator alternating current connection copper bar 2302, an inverter side beam plug 2303 and a motor side beam plug 2304 are arranged on the three-phase alternating current wire holder assembly 23.

Preferably, the bus bar capacitor assembly 13 includes: dc copper bar 1301, discharge resistor copper bar 1302, driving motor side ac copper bar 1303, wherein: the dc copper bar 1301 is electrically connected to the filter, the discharge resistor copper bar 1302 is electrically connected to the discharge resistor 22 via a wire harness, the driving motor side ac copper bar 1303 is electrically connected to the driving motor power module 5, and the generator side ac copper bar 1304 is electrically connected to the generator power module 6.

Preferably, a copper bar 1401 is arranged on the electromagnetic filter assembly 14, the electromagnetic filter assembly 14 is electrically connected with the direct-current high-voltage connector 16 through the copper bar 1401, a copper column 1402 with internal threads is further arranged on the electromagnetic filter assembly 14, the electromagnetic filter assembly 14 is electrically connected with the direct-current copper bar 1301 through the copper column 1402, a magnetic ring 1403 is arranged on the periphery of the copper column 1402, and a first cover plate 1404 and a second cover plate 1405 are further arranged on the electromagnetic filter assembly 14.

The driving unit comprises a generator and a driving motor, the driving unit is also provided with the double-motor inverter, the inverter is electrically connected with the driving motor through a driving motor alternating current connection copper bar 2301, and the driving motor alternating current connection copper bar 2301 and the generator alternating current connection copper bar 2302 on the three-phase alternating current wiring seat assembly 23 are respectively connected with the driving motor and the generator.

A hybrid vehicle is provided with a drive unit.

The dual-motor inverter assembly as shown in fig. 1, 1A to 1E and 2A comprises a main box 1, an upper box 2, an upper cover 3, a bottom shell 4, a driving motor power module 5, a generator power module 6, a driving motor module driving plate 7, a generator power module driving plate 8, a driving motor current sensor 9, a generator current sensor 10, a driving motor alternating current busbar wire holder assembly 11, a generator alternating current busbar wire holder assembly 12, a busbar capacitor assembly 13 (hereinafter referred to as a capacitor or a capacitor assembly), an electromagnetic filter assembly 14 (hereinafter referred to as a filter or a filter assembly), a control panel 15, a direct current high-voltage connector 16, a low-voltage connector 17, an alternating current connection cover plate seal ring 18, a three-phase alternating current connection cover plate 19, a water inlet pipe 20 and a water outlet pipe 21.

The cavities between the main box body 1, the upper box body 2 and the bottom shell 4 form a high-voltage isolation region, main high-voltage components of the inverter are arranged in two layers of the high-voltage isolation region, the driving motor power module 5 and the generator power module 6 are arranged on the main box body in parallel, and the driving motor power module driving plate 7 and the generator power module driving plate 8 are respectively arranged on the two power modules; the main body of the busbar capacitor assembly is a cuboid, the shape is regular, 12 copper bars provided by the capacitor are directly connected with the two power modules, the direct current busbar is not used for switching, the cost is reduced, and the assembly simplicity is improved; the electromagnetic filter assembly 14 and the discharge resistor 22 are arranged on one side of the capacitor, the capacitor is directly connected by using a copper bar with the capacitor, and the high-voltage connector is arranged on the rear side of the whole inverter, which is also the rear side of the front cabin of the whole vehicle;

in addition, the connection between the high-voltage connector and the filter is also through a busbar of the filter; the main box body 1 not only provides support and positioning for the installation of devices such as a power module, a capacitor, a filter and the like, but also isolates the electromagnetic filter from the power module through the structure of the main box body, so as to play a role in shielding and avoid the influence of electromagnetic radiation of the filter on the operation of the power module; the control board 15 is fixed on the upper case 2, and the upper case 2 functions similarly to the main case 1, except for fixing the control board 15, the upper case 1 also functions as a shielding plate, blocking high-voltage radiation of the power module and the driving board from being transmitted to the control board 15. By way of example, the overall inverter assembly in this embodiment approximates a cuboid in shape, facilitating generalized placement on different vehicle models.

As shown in fig. 3, 4 and 5, the front water channel cover plate 104 of the main box body and the middle water channel cover plate 105 of the main box body are welded on the main box body 1 through friction stir welding, and the water inlet pipe and the water outlet pipe are pressed on the main box body in an interference manner; the cooling liquid enters the front water channel 101 of the main box body through the water inlet pipe, then enters the water channel of the driving motor power module, flows out of the driving motor power module, then enters the middle water channel 102 of the main box body, then enters the water channel of the generator power module, passes through the water inlet pipe 103 of the main box body, finally flows out of the water outlet pipe 21, and the heat dissipation process of the inverter is completed. The whole inverter water channel provides heat dissipation requirements for the capacitor assembly, the filter assembly and the discharge resistor 22 while heat dissipation for the power module, and the whole inverter has good heat dissipation performance, so that the running stability of the inverter is improved in design.

It is noted that the provision of a cooling structure within the main housing does not mean that all components of the cooling structure are located entirely within the main housing, and that components of the cooling structure may pass out of the main housing to be connected to the outside or to other components within the inverter.

As shown in fig. 6 and 7, the bus bar capacitor assembly 13, the electromagnetic filter assembly 14, and the discharge resistor 22 are fixed to the main casing 1 at the other side opposite to the power module. The positions of the front water channel 101 of the main box body and the middle water channel 102 of the main box body, which are in contact with the capacitor, are coated with heat dissipation glue, so that the capacitor is assisted to dissipate heat; the mounting plane of the discharge resistor is obtained by machining, and the mounting surface is coated with heat dissipation glue, and the heat dissipation is assisted by the metal structure of the main box body 1.

The bus capacitor assembly 13 is provided with a plurality of copper bars, the direct current copper bar 1301 is directly connected with the filter, the discharge resistor copper bar 1302 is connected with the discharge resistor 22 through a wire harness, the driving motor side alternating current copper bar 1303 is directly connected with the driving motor power module 5, and the generator side alternating current copper bar 1304 is directly connected with the generator power module 6.

The electromagnetic filter assembly 14 is directly connected with the direct current high voltage connector 16 through the copper bar 1401, is connected with the direct current copper bar 1301 through the copper column 1402 with internal threads, and filters harmful waveforms in electric energy from the battery together by utilizing the magnetic ring 1403, the first cover plate 1404 and the X capacitor and the Y capacitor arranged below the second cover plate 1405, thereby improving EMC level. Because the filter and the capacitor are arranged on one side, the power module is arranged on the other side, and the interference of the radiation generated by the filter on the power module is isolated through the metal flat plate structure between the power module layer and the capacitor and between the filter layer on the main box body.

As shown in fig. 8, the control board 15 has 6 low-voltage signal connectors, which are respectively a driving motor power module control board 50pin connector 1501, an inverter whole vehicle harness connector 1502, a generator power module driving board-to-board connector 1503, a rotary transformer and temperature sensor harness connector 1504, a driving motor current sensor and generator current sensor two-in-one connector 1505 and a high-voltage interlocking connector 1506. Six low-voltage signal connectors on the control panel are connected with the opposite-matched connectors through five low-voltage wire harnesses and a board-to-board connector respectively, and the six low-voltage wire harnesses are respectively: the driving motor power module driving board 50pin wire arrangement, the whole inverter low-voltage wire harness, the rotary transformer and temperature sensor wire harness, the driving motor current sensor and generator current sensor two-in-one wire harness and the high-voltage interlocking wire harness are arranged in the way of the parts and the control board wiring board as shown in the figure, so that the wire harness is reasonable in wiring, the wire harness is not easy to scratch and is subjected to electromagnetic interference, and the reliability of the inverter is improved;

as shown in fig. 9 and 10, in order to realize the rotation and temperature harness built-in and to improve the EMC level, openings for the rotation (sensor) and temperature sensor harness built-in are provided in both the main casing 1 and the upper casing 2. As shown in fig. 9, a through hole 106 for wiring is provided in the main casing 1, and a terminal 107 is provided on one side of the through hole 106, and the terminal 107 is used for mounting the ac busbar holder assembly 11 and the three-phase ac holder assembly 23. The terminals 107 also facilitate assembly by allowing a user to insert a wiring harness into the ac busbar mount assembly 11. The function of the opening of the connecting bolt position of the alternating current busbar and three-phase alternating current wiring seat assembly 23 is to reserve space for the rotary transformer and temperature wiring harness 24, the wiring harness 24 passes through the wire holes of the upper box 2 and the main box 1 and is connected to the side wiring harness plug-in connector 2303 of the alternating current inverter, and the wiring harness is convenient to install and disassemble.

The three-phase ac wire holder assembly 23 is a component for integrating high-low voltage connection, and its main components are a driving motor ac connection copper bar 2301, a generator ac connection copper bar 2302, an inverter lateral line bundle plug-in unit 2303 and a motor lateral line bundle plug-in unit 2304, in addition, the three-phase ac wire holder assembly further comprises injection molding parts and sealing parts, after the three-phase ac wire holder assembly 23 and the inverter are installed, copper bar connection bolts are installed through a window of a main box body, after a rotary transformer and a temperature wire harness are inserted, an ac connection cover plate sealing ring 18 is installed, and then a three-phase ac connection cover plate 19 is installed, thus completing the assembly of the whole inverter. By combining the design of high-low voltage separation, the filter assembly and the design of built-in rotation transformation and degree wire harness, the inverter can realize higher EMC level.

As shown in fig. 11 to 14, the initial state before the driving motor side ac copper bars 1303 and generator side ac copper bars 1304 of the busbar capacitor assembly 13 are assembled is vertically upward, and the assembled state is bent again to bring the copper bars close to the module. Therefore, the embodiment of the invention adjusts the relative position relation between the capacitor and the power module, so that the capacitor and the power module have the direct connection condition; the capacitor is provided with the busbar, the secondary bending process (the initial state is straight) is carried out after the capacitor is assembled, the direct current busbar is prevented from being used for switching, compared with the prior art, the module position in the prior art determines that the direct connection mode cannot be used, and the direct connection can be realized.

As shown in fig. 15 to 19, 19A and 19B, the combination of the driving unit includes an inverter a, a generator B, and a driving motor C, in which there is a connection relationship a-B between the generator and the inverter, since the inverter is too far from the motor, connection is required using a wire harness and a connector, and in which the driving motor and the transmission use separate housings, and a capacitor is located between the inverter and the generator, resulting in that the inverter and the generator cannot be directly connected. In the embodiment of the invention, the driving motor and the transmission are designed to form a common shell, and each side of the inverter and the driving motor is integrated with an alternating current busbar at one place and connected by using a three-phase wire holder integrating high voltage and low voltage.

When the motor rotary sensor is assembled, firstly, the motor rotary sensor is placed at one side close to the transmission, and the wire harness is connected to the low-voltage switching part of the three-phase wire holder along the inner shell and then connected with the inverter; after the inverter is assembled on the transmission, the end rotation of the inverter and the temperature wire harness are inserted into the low-voltage switching part of the three-phase wire holder through the small window, and then the cover plate is installed. Through the means, the rotation of the electric drive system and the complete internal arrangement of the temperature wire harness are realized, and the EMC level is effectively improved. Therefore, the embodiment of the invention realizes the interconnection of the generator, the driving motor and the inverter without using a peripheral wire harness and a connector, and reduces the cost.

In the prior art, a rotary transformer sensor is positioned on one side of a motor end cover, a temperature sensor is positioned on a stator, two motors respectively use a connector to transmit rotary transformer and temperature signals, the external wire harnesses can cause electromagnetic interference to external emission, and signals on the two wire harnesses can also be interfered by external electromagnetic waves. In the embodiment of the invention, a motor rotation sensor is firstly placed at one side close to a speed changer, and a wire harness is connected to a low-voltage switching part of a three-phase wire holder along an inner shell and then connected with an inverter; after the inverter is assembled on the transmission, the end rotation of the inverter and the temperature wire harness are inserted into the low-voltage switching part of the three-phase wire holder through the small window, and then the cover plate is installed; through the means, the complete embedment of the rotation of the electric drive system and the temperature wire harness is realized, and the EMC level is effectively improved. Therefore, the embodiment of the invention improves the EMC level, and the integrated motor end cover without holes improves the reliability of oil seal.

The resolver 1601 is seen in a cross-sectional view of the entire structure of the inverter, the generator, and the drive motor, where the resolver 1601 is annular, and only an annular cross-section is seen since the cross-sectional view is cut from the axis. The top end of the integral structure is provided with a control board rotary change and temperature signal connector 1602, and the integral structure also comprises a three-phase wire holder low-voltage switching part 1603 and a conventional product rotary change sensor position 1604.

The invention also discloses a driving unit provided with the double-motor inverter and a hybrid power vehicle provided with the driving unit, wherein the driving unit comprises a generator B and a driving motor C, the driving unit is also provided with the double-motor inverter, the inverter A is electrically connected with the driving motor C through a driving motor alternating current connection copper bar 2301, a driving motor alternating current connection copper bar 2301 and a generator alternating current connection copper bar 2302 on a three-phase alternating current wiring seat assembly 23 are respectively connected with the driving motor and the generator, each side of the inverter and the motor is integrated with the alternating current bus bars, and the inverter is connected with a three-phase wiring seat integrating high voltage and low voltage, and an external wire harness and a connector are not used.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the 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 scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that certain terms are used throughout the description and claims to refer to particular elements. It will be appreciated by those of ordinary skill in the art that different manufacturers, manufacturers may refer to a component by different names. The description and claims do not differ by the way in which they distinguish between components, but rather differ by the way in which they function.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.

In addition, functional modules in the embodiments of the present invention may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.

All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps. Any feature disclosed in this specification may be replaced by alternative features serving the same or equivalent purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise. Like reference numerals refer to like elements throughout the specification.

Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component and, furthermore, they may be divided into a plurality of sub-modules or sub-units or sub-components. Any combination of all features disclosed in this specification (including the corresponding claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be used in combination, except insofar as at least some of such features and/or processes or units are mutually exclusive. Each feature disclosed in this specification (including the corresponding claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, any of the embodiments claimed in the claims may be used in any combination.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order, and the words may be interpreted as names.

In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Reference to "comprising" or "including" in the specification and claims is an open-ended term that should be interpreted to mean "including, but not limited to. The following description of the preferred embodiments of the invention is provided for the purpose of illustration and is not intended to limit the scope of the invention. The scope of the invention is defined in the appended claims.

It should be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the 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 scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (10)

1. A dual motor inverter comprising: the novel high-voltage power supply device is characterized in that a driving motor power module (5) and a generator power module (6) are installed on the main box body (1), a driving motor power module driving plate (7) and a generator power module driving plate (8) are installed on the driving motor power module (5) and the generator power module (6) respectively, an upper box body (2) is arranged between the main box body (1) and the upper cover (3), a shielding area is formed between the upper box body (2) and the upper cover (3), a control board (15) is arranged in the shielding area, a bus capacitor assembly (13), an electromagnetic filter assembly (14) and a discharge resistor (22) are fixedly connected to the main box body (1), the electromagnetic filter assembly (14) and the discharge resistor (22) are arranged on the same side of the bus capacitor assembly (13), the bus capacitor assembly (13) and the driving motor power module (5) are electrically connected with a copper bar assembly (16) through a driving motor side copper bar, and the bus capacitor assembly is electrically connected with a direct-current (1401) through a copper bar electric connector (16).

2. The dual motor inverter of claim 1, wherein the cooling structure comprises: the novel wire harness water heater comprises a main box body water pipe (103) and a water outlet pipe (21) connected with the main box body water pipe (103), and further comprises a main box body middle water channel (102) and a main box body front water channel (101), wherein the main box body front water channel is connected with a water inlet pipe (20), and openings used for arranging wire harnesses in the main box body (1) and the upper box body (2) are formed in the main box body.

3. The dual motor inverter according to claim 2, wherein a main tank front waterway cover plate (104) is provided on the main tank front waterway (101), and a main tank middle waterway cover plate (105) is provided on the main tank middle waterway (102).

4. A two-motor inverter according to claim 3, characterized in that the main tank front water channel cover plate (104) and the main tank middle water channel cover plate (105) are fixed to the main tank (1) by welding, and the water inlet pipe (20) and the water outlet pipe (21) are mounted to the main tank (1) by interference fit.

5. The two-motor inverter according to claim 1, characterized in that an insert for connecting a low-voltage harness and for a plug board is provided in the control board (15), comprising in particular: the power module control board comprises a driving motor power module control board 50pin plug-in (1501), an inverter whole vehicle wiring harness plug-in (1502), a generator power module driving board-to-board plug-in (1503), a rotation and temperature sensor wiring harness plug-in (1504), a driving motor current sensor and generator current sensor two-in-one plug-in (1505) and a high-voltage interlocking plug-in (1506).

6. The dual-motor inverter according to claim 1, further comprising a three-phase ac wire holder assembly (23), wherein a drive motor ac connection copper bar (2301), a generator ac connection copper bar (2302), an inverter side harness plug (2303), and a motor side harness plug (2304) are provided on the three-phase ac wire holder assembly (23).

7. The two-motor inverter according to claim 1, characterized in that the bus bar capacitor assembly (13) comprises: direct current copper bar (1301), discharge resistance copper bar (1302), driving motor side alternating current copper bar (1303), wherein: the direct current copper bar (1301) is electrically connected with the filter, the discharge resistor copper bar (1302) is electrically connected with the discharge resistor (22) through a wire harness, the driving motor side alternating current copper bar (1303) is electrically connected with the driving motor power module (5), and the generator side alternating current copper bar (1304) is electrically connected with the generator power module (6).

8. The dual-motor inverter according to claim 1, characterized in that a copper bar (1401) is arranged on the electromagnetic filter assembly (14), the electromagnetic filter assembly (14) is electrically connected with the direct-current high-voltage connector (16) through the copper bar (1401), a copper column (1402) with internal threads is further arranged on the electromagnetic filter assembly (14), the electromagnetic filter assembly (14) is electrically connected with the capacitor direct-current copper bar (1301) through the copper column (1402), a magnetic ring (1403) is arranged on the periphery of the copper column (1402), and a first cover plate (1404) and a second cover plate (1405) are further arranged on the electromagnetic filter assembly (14).

9. A driving unit provided with a double-motor inverter, the driving unit comprises a generator and a driving motor, and is characterized in that the driving unit is also provided with the double-motor inverter according to any one of claims 1 to 8, the inverter is electrically connected with the driving motor through a driving motor alternating current connection copper bar (2301), and the driving motor alternating current connection copper bar (2301) and the generator alternating current connection copper bar (2302) on a three-phase alternating current wiring seat assembly (23) are respectively connected with the driving motor and the generator.

10. A hybrid vehicle, characterized in that the hybrid vehicle is provided with the drive unit according to claim 9.

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