CN114844297A - High-power-density oil-cooled motor assembly - Google Patents

Abstract

The invention relates to a high-power-density oil-cooled motor assembly which comprises a motor controller, a motor body and a motor assembly tool, wherein a power component, a current sensor and a three-phase output component are arranged in a box body, the three-phase output component comprises a first copper bar and a second copper bar, the second copper bar is positioned below the first copper bar, one end of the first copper bar penetrates through the current sensor to be electrically connected with the power component, and the other end of the first copper bar is electrically connected with the second copper bar; the lateral surface of motor body is equipped with the motor wire holder, and nested in the motor wire holder has motor input copper bar, and inside motor input copper bar got into the box through with three-phase output assembly block, with second copper bar electrical connection, sealed between motor input copper bar and the motor wire holder, adopt the sealing washer sealed and compress tightly between the fitting surface of motor wire holder and box. Compared with the prior art, the invention has the advantages of good filtering effect, higher power density, integration with an oil-cooled motor, convenient integrated assembly and manufacture and the like.

Description

High-power-density oil-cooled motor assembly

Technical Field

The invention relates to the field of motor controllers, in particular to a high-power-density oil-cooled motor assembly.

Background

With the continuous popularization of new energy automobiles, the driving motor system has wider market prospect. Because the power of the driving motor system is larger, more heat can be generated in the working process of the driving motor system, and the temperature of the driving motor system can rise faster. And the driving motor system continuously works at high temperature, so that the working efficiency of the driving motor system is reduced, and even serious faults occur under extreme conditions. In order to avoid overhigh temperature rise of the driving motor, an auxiliary heat dissipation system is needed to take away heat generated in the running process of the motor so as to meet the actual heat dissipation requirement. Therefore, the radiator is an important component of the driving motor system, the cooling effect of the radiator is improved, and the radiator plays a vital role in improving the working performance and the working reliability of the driving motor and the motor controller.

The traditional motor control system adopts cooling liquid for cooling, namely a heat dissipation water channel is obtained on a motor shell through low-pressure casting, the interior of a controller box is also provided with the heat dissipation water channel, a motor controller is communicated with the heat dissipation water channel of a motor, and the cooling liquid is introduced to cool and dissipate heat of the motor system during working. The heat dissipation cooling scheme generally adopts an indirect mode for heat dissipation, and because cooling liquid cannot enter the motor and the controller to directly dissipate heat of a heating source, the cooling effect is limited. However, as the power requirement on the system is higher and higher, the heat generated by the motor is more and more serious, and therefore, a new cooling medium needs to be selected to directly cool the heat generated by the stator and the rotor of the motor. And present split type two unification systems because motor and controller three-phase hookup location generally all communicate, in case adopt the cold direct cooling of oil, the cooling oil gets into to the controller cavity from the motor the inside very easily, like this because the irregular circulation that can arouse the cooling oil of controller cavity becomes poor, reduces the radiating effect of cooling oil. Therefore, an oil-cooled motor system is urgently needed to be designed, the three-phase connection position of the controller and the motor is completely sealed, the controller and the motor end are subjected to direct insertion type assembly, the integration level of the controller and the motor end is improved, and the automatic assembly production efficiency is further improved.

Disclosure of Invention

The invention aims to provide an oil-cooled motor assembly with high power density to overcome the defect of poor heat dissipation effect of cooling oil in the prior art.

The purpose of the invention can be realized by the following technical scheme:

a high-power-density oil-cooled motor assembly comprises a motor controller, a motor body and a motor assembly tool, wherein the motor controller is provided with a box body, a liquid storage tank is arranged in the box body, two oil pipe joints are connected with the liquid storage tank in a compression joint mode from the outside, the two oil pipe joints are respectively arranged on two opposite side faces of the box body and are connected with an oil-cooled pipeline of the motor body, the motor assembly tool is connected with the side end of the motor body, and the motor controller is fixed at the upper ends of the motor assembly tool and the motor body;

the power assembly, the current sensor and the three-phase output assembly are arranged in the box body, the three-phase output assembly is located at the bottom end of the box body, the power assembly is arranged above the three-phase output assembly, the current sensor is arranged on the side face of the power assembly, the three-phase output assembly comprises a first copper bar and a second copper bar, the first copper bar and the second copper bar are both three-phase copper bars, the second copper bar is located below the first copper bar, one end of the first copper bar penetrates through the current sensor to be electrically connected with the power assembly, and the other end of the first copper bar is electrically connected with the second copper bar;

the lateral surface of motor body is equipped with the motor wire holder, nested motor input copper bar that has in the motor wire holder, motor input copper bar is the three-phase copper bar, inside the motor input copper bar got into the box through the three-phase output assembly block with motor controller, make motor body fix on motor controller, and motor input copper bar and second copper bar electrical connection, it is sealed to adopt O type circle between motor input copper bar and the motor wire holder, adopt the sealing washer sealed and compress tightly through the screw between the fitting surface of motor wire holder and box.

The three-phase output assembly is located at the lower part of the box body and further comprises a copper bar cover, a first copper bar seat and a second copper bar seat, the second copper bar seat is located below the first copper bar seat, the second copper bar seat is fixed to the bottom surface of the box body, the copper bar cover is fixed to the first copper bar seat through bonding, and the first copper bar and the second copper bar are fixed to grooves of the first copper bar seat and the second copper bar seat respectively.

The power assembly is positioned in the middle of the box body, the two-phase input assembly is positioned on one side of the power assembly, the thin film capacitor is positioned on the other side of the power assembly, the input end of the thin film capacitor is electrically connected with the output end of the two-phase input assembly, and the output end of the thin film capacitor is electrically connected with the two-phase input end of the power assembly.

Furthermore, the two-phase input assembly comprises two phase plug-in components, a discharge resistor and a support, wherein the support is provided with a positive copper bar and a negative copper bar, the two phase plug-in components are fixed on the outer surface of one side of the box body, the discharge resistor is positioned below the two phase plug-in components and fixed on the box body, the discharge resistor is provided with two leads, one lead and the input end of the positive copper bar are electrically connected with the positive output terminal of the two phase plug-in components, and the other lead and the input end of the negative copper bar are electrically connected with the negative output terminal of the two phase plug-in components.

Furthermore, the middle part and one end of the support are both provided with a capacitor groove and a through hole, a first Y capacitor and a second Y capacitor are respectively fixed in the capacitor groove through pouring sealant, a grounding copper sheet is arranged in the through hole, and the grounding copper sheet and the support are simultaneously fixed on the box body through screws.

Furthermore, the input end of the positive copper bar is provided with a positive copper bar pin angle, the first Y capacitor is provided with two leads, one lead is electrically connected with the positive copper bar pin angle of the positive copper bar, and the other lead is electrically connected with the grounding copper sheet on the same side; the input end of the negative copper bar is provided with a negative copper bar pin angle, the second Y capacitor is provided with two leads, one lead is electrically connected with the negative copper bar pin angle of the negative copper bar, and the other lead is electrically connected with the grounding copper sheet on the same side.

Further, the other end of the support is provided with a magnetic ring groove, two magnetic rings are arranged in the magnetic ring groove side by side, a magnetic ring groove is formed in one side of each magnetic ring, the positive copper bar and the negative copper bar sequentially penetrate out of the edges of the magnetic ring groove and the magnetic ring groove, and a silica gel pad and a magnetic ring cover are sequentially arranged above each magnetic ring.

Furthermore, one side surface of the thin-film capacitor is a potting surface, a positive input terminal, a negative input terminal, a grounding terminal and an output terminal are led out of the potting surface, the output terminal of the positive copper bar is electrically connected with the positive input terminal of the thin-film capacitor, and the output terminal of the negative copper bar is electrically connected with the negative input terminal of the thin-film capacitor.

Further, power component includes power module, PCBA control panel, terminal fixed bolster, and power module is located the upper surface of PCBA control panel, and the one end of PCBA control panel is located to the terminal fixed bolster, and power module includes direct current input terminal and three-phase input terminal, and direct current input terminal passes through the fix with screw on the terminal fixed bolster with film capacitor's output terminal, and the terminal fixed bolster is fixed on the box, and the bottom of box is equipped with the bottom case lid, and the bottom case lid passes through the fix with screw in the bottom surface of box, and it seals to adopt the point to glue with the bottom surface of box.

The front end of the motor body is provided with two oil inlet pipes, one of the oil inlet pipes is communicated with the motor rotating shaft, cooling oil is introduced into the motor rotating shaft and is sprayed out from an oil spraying hole in the center of the rotating shaft, and the other oil inlet pipe is located on the upper edge of an end cover of the motor body, so that direct cooling of an end winding is achieved.

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

1. the motor input copper bar enters the box body through being clamped with the three-phase output assembly, so that the motor body is fixed on the motor controller, the three-phase output copper bar of the controller is connected with the three-phase input copper bar of the motor in a direct insertion mode in the axial direction of the motor, the traditional motor junction box structure is saved, the space is saved, the motor structure is more compact, and the connection reliability is improved.

2. According to the invention, the motor input copper bar and the motor wire holder are sealed, and the matching surfaces of the motor wire holder and the box body are sealed and pressed by the sealing ring, so that the three-phase connection part of the controller and the motor is completely sealed, the whole motor and the motor controller heat dissipation water channel are integrated, and meanwhile, the heat dissipation of the rotor shaft, the end part of the stator winding and the motor controller is realized, and the heat dissipation effect is improved.

3. According to the invention, the positive copper bar and the negative copper bar are arranged in a laminated manner, mutual inductance is effectively reduced, and meanwhile, the two-phase copper bar passes through the two pairs of U-shaped magnetic rings after lamination, so that further filtering of the copper bar is realized, the input current is ensured to have higher electromagnetic interference resistance, and the stability of the whole motor system is favorably improved.

4. The front end of the motor body is provided with two oil inlet pipes, one of the oil inlet pipes is communicated with the motor rotating shaft, cooling oil is introduced into the motor rotating shaft and is sprayed out from an oil spray hole in the center of the rotating shaft to take away heat generated by magnetic steel, and the other oil inlet pipe is positioned on the upper edge of an end cover of the motor body to directly cool an end winding, so that double heat dissipation of a motor rotor and a stator winding is realized.

5. The motor assembly tool is connected with the side end of the motor body, and the motor controller is fixed at the upper ends of the motor assembly tool and the motor body, so that the motor assembly has the advantages of compact overall structure, small volume and higher power density.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the motor controller of the present invention;

FIG. 3 is a schematic structural diagram of a three-phase output module according to the present invention;

FIG. 4 is a schematic structural diagram of the motor body according to the present invention;

FIG. 5 is a schematic diagram of a two-phase input module according to the present invention;

FIG. 6 is a schematic diagram of a two-phase input assembly support according to the present invention;

FIG. 7 is a schematic view of a magnetic ring of the two-phase input assembly according to the present invention;

FIG. 8 is a schematic structural diagram of a thin film capacitor according to the present invention;

FIG. 9 is a schematic structural diagram of a power module according to the present invention;

FIG. 10 is a schematic view of the structure of the case of the present invention;

fig. 11 is an exploded view of the present invention.

Reference numerals:

1 is a motor controller; 2 is a motor body; 3, a motor assembly tool; 4 is a box body; 5 is a two-phase input assembly; 6 is a thin film capacitor; 7 is a top box cover; 8 is a power component; 9 is a current sensor; 10 is a signal plug-in unit; 11 is an oil pipe joint; 12 is a three-phase output component; 13 is a bottom box cover; 12-1 is a first copper bar; 12-2 is a second copper bar; 12-3 is a first copper row seat; 12-4 is a second copper bar seat; 12-5 is a copper bar cover; 2-1 is a motor wire holder; 2-2 is a motor input copper bar; 4-1 is the top surface of the box body; 4-2 is the bottom surface of the box body; 5-1 is a two-phase plug-in; 5-2 is a discharge resistor; 5-3 is a support; 5-4 is a first Y capacitor; 5-5 is a grounding copper sheet; 5-6 is a positive copper bar; 5-7 is a negative copper bar; 5-8 is a second Y capacitor; 5-9 is a magnetic ring; 5-10 is a magnetic rubber cushion; 5-11 is a magnetic ring cover; 5-12 are through holes; 5-13 are capacitor grooves; 5-14 are magnetic ring grooves; 5-15 are magnetic ring grooves; 6-1 is a cover of irrigation; 6-2 is a positive input terminal; 6-3 is a negative input terminal; 6-4 is a grounding terminal; 6-5 are output terminals; 8-1 is a power module; 8-2 is a PCBA control plate; 8-3 is a terminal fixing bracket; 8-4 are radiating fins; 8-5 are three-phase input terminals; 8-6 are module signal line pin angles; 8-7 are DC input terminals; 8-8 is a rotary variable plug-in; 8-9 are signal plug-ins of the whole vehicle; 11-1 is a liquid inlet; 11-2 is a liquid outlet; 11-3 is a liquid storage tank.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Examples

As shown in figures 1 and 11, a high power density oil-cooled motor assembly comprises a motor controller 1, a motor body 2 and a motor assembly tool 3, wherein the motor controller 1 is provided with a box body 4, as shown in figure 10, a liquid storage tank 11-3 is arranged inside the box body 4, two oil pipe joints 11 are pressed outside the box body 4 in a compression joint mode, the oil pipe joints 11 are communicated with the liquid storage tank 11-3, one oil pipe joint 11 is a liquid inlet 11-1 and is pressed on the side face of the box body 4 close to two-phase input components 5, the other oil pipe joint is a liquid outlet 11-2 and is pressed on the side face of the box body 4 opposite to the two-phase input components 5, the oil pipe joints 11 are connected with an oil-cooled pipeline of the motor body 2, the motor controller 1 is mainly fixed on the motor body 2 and the motor assembly tool 3 through 6 support legs, the bottom face of the motor controller 1 is provided with four support legs, and the other two support legs are respectively fixed on the top face of a machine shell of the motor body 2 and the motor assembly tool 3, two support legs on the side surface are fixed on the front end cover of the motor body;

as shown in fig. 3, a power assembly 8, a current sensor 9 and a three-phase output assembly 12 are arranged in the box body 4, the three-phase output assembly 12 is located at the bottom end of the box body 4, the power assembly 8 is located above the three-phase output assembly 12, the current sensor 9 is located on the side surface of the power assembly 8, the three-phase output assembly 12 comprises a first copper bar 12-1 and a second copper bar 12-2, the first copper bar 12-1 and the second copper bar 12-2 are both three-phase copper bars, the second copper bar 12-2 is located below the first copper bar 12-1, one end of the first copper bar 12-1 penetrates through the current sensor 9 and is electrically connected with the power assembly 8, and the other end of the first copper bar 12-1 is electrically connected with the second copper bar 12-2;

as shown in fig. 4, a motor wire holder 2-1 is arranged on the outer side surface of the motor body 2, a motor input copper bar 2-2 is nested in the motor wire holder 2-1, the motor input copper bar 2-2 is a three-phase copper bar, the motor input copper bar 2-2 enters the interior of the box body 4 through being clamped with the three-phase output assembly 12, the motor body 2 is fixed on the motor controller 1, the motor input copper bar 2-2 is electrically connected with the second copper bar 12-2, an O-ring seal is adopted between the motor input copper bar 2-2 and the motor wire holder 2-1, and a seal ring seal is adopted between the matching surfaces of the motor wire holder 2-1 and the box body 4 and is compressed through screws.

The three-phase output assembly 12 is positioned at the lower part of the box body 4 and further comprises a copper bar cover 12-5, a first copper bar seat 12-3 and a second copper bar seat 12-4, the second copper bar seat 12-4 is positioned below the first copper bar seat 12-3, the second copper bar seat 12-4 is fixed at the bottom surface of the box body 4, the copper bar cover 12-5 is fixed on the first copper bar seat 12-3 through bonding, and the first copper bar 12-1 and the second copper bar 12-2 are respectively fixed in grooves of the first copper bar seat 12-3 and the second copper bar seat 12-4.

The box 4 is inside still to include two-phase input assembly 5, film capacitor 6, top case lid 7 and signal plug-in components 10, power component 8 is located 4 middle parts of box, two-phase input assembly 5 is located 8 one sides of power component, two-phase input assembly 5's input is through obtaining two looks electricity with whole car battery package electrical connection, film capacitor 6 is located 8 opposite sides of power component, film capacitor 6's input and two-phase input assembly 5's output electrical connection, the output and power component 8's two-phase input electrical connection.

As shown in fig. 5, the two-phase input assembly 5 includes two-phase plug-in components 5-1, a discharge resistor 5-2 and a support 5-3, the support 5-3 is provided with a positive copper bar 5-6 and a negative copper bar 5-7, the two-phase plug-in components 5-1 are fixed on the outer surface of one side of the box 4, the discharge resistor 5-2 is located below the two-phase plug-in components 5-1 and fixed on the box 4, the discharge resistor 5-2 is provided with two leads, one of the leads and the input end of the positive copper bar 5-6 is electrically connected with the positive output terminal of the two-phase plug-in components 5-1, and the other lead and the input end of the negative copper bar 5-7 are electrically connected with the negative output terminal of the two-phase plug-in components 5-1.

As shown in fig. 6, capacitance grooves 5-13 and through holes 5-12 are formed in the middle and one end of the support 5-3, a first Y capacitor 5-4 and a second Y capacitor 5-8 are fixed in the capacitance grooves 5-13, grounding copper sheets 5-5 are arranged in the through holes 5-12, and the grounding copper sheets 5-5 and the support 5-3 are fixed on the box body 4 through screws.

The input end of the positive copper bar 5-6 is provided with a positive copper bar pin angle, the first Y capacitor 5-4 is provided with two leads, one lead is electrically connected with the positive copper bar pin angle of the positive copper bar 5-6, and the other lead is electrically connected with the grounding copper sheet 5-5 on the same side; the input end of the negative copper bar 5-7 is provided with a negative copper bar pin angle, the second Y capacitor 5-8 is provided with two leads, one lead is electrically connected with the negative copper bar pin angle of the negative copper bar 5-7, and the other lead is electrically connected with the grounding copper sheet 5-5 on the same side.

The other end of the support 5-3 is provided with a magnetic ring groove 5-14, two magnetic rings 5-9 are arranged in the magnetic ring groove 5-14 side by side, as shown in figure 7, one side of the magnetic ring 5-9 is provided with a magnetic ring groove 5-15, a positive copper bar 5-6 and a negative copper bar 5-7 sequentially penetrate through the edges of the magnetic ring groove 5-15 and the magnetic ring groove 5-14, and a silica gel pad 5-10 and a magnetic ring cover 5-11 are sequentially arranged above the magnetic ring 5-9.

As shown in fig. 8, one side surface of the thin film capacitor 6 is a potting surface 6-1, a positive input terminal 6-2, a negative input terminal 6-3, a ground terminal 6-4, and an output terminal 6-5 are led out from the potting surface 6-1, the output terminal of the positive copper bar 5-6 is electrically connected with the positive input terminal 6-2 of the thin film capacitor 6, and the output terminal of the negative copper bar 5-7 is electrically connected with the negative input terminal 6-3 of the thin film capacitor 6.

As shown in fig. 9, the power module 8 includes a power module 8-1, a PCBA control board 8-2 and a terminal fixing bracket 8-3, the power module 8-1 is located on the upper surface of the PCBA control board 8-2, the terminal fixing bracket 8-3 is located at one end of the PCBA control board 8-2, the power module 8-1 includes a dc input terminal 8-7, a heat dissipating fin 8-4, a module signal line pin 8-6 and a three-phase input terminal 8-5, the heat dissipating fin 8-4 is located inside the liquid storage tank 11-3, the dc input terminal 8-7 and an output terminal 6-5 of the thin film capacitor 6 are fixed on the terminal fixing bracket 8-3 by screws, the terminal fixing bracket 8-3 is fixed on the box body 4, the PCBA control board 8-2 has a variable plug 8-8 and a whole vehicle signal plug 8-9, the rotary transformer plug-in 8-8 and the whole vehicle signal plug-in 8-9 are electrically connected with the signal plug-in 10 through a wiring harness.

A bottom box cover 13 is arranged at the bottom of the box body 4, and the bottom box cover 13 is fixed on the bottom surface of the box body 4 through screws and sealed with the bottom surface of the box body 4; the top box cover 7 is positioned at the top of the box body 4, is fixed on the top surface 4-1 of the box body through screws, and is sealed with the top surface 4-1 of the box body through glue dispensing.

The front end of motor body 2 is equipped with two oil pipes, and one of them oil pipe and motor shaft intercommunication let in the inside of motor shaft with the cooling oil to from the nozzle opening blowout at pivot center, the other oil pipe that advances is located motor body 2's end cover top edge, realizes the direct cooling to end winding.

The assembly process of this embodiment is as follows:

firstly, sealant is sequentially dispensed on sealing grooves of a top surface 4-1 and a bottom surface 4-2 of a box body, the sealant is dried, then an oil pipe joint 11 is pressed at a liquid inlet 11-1 and a liquid outlet 11-2 of the side surface of the box body 4, a terminal fixing support 8-3 is placed inside the box body 4, a PCBA control board 8-2 is fixed on a module 8-1 through 8 self-tapping screws, then the PCBA control board 8-2 is fixed on the box body 4 through screws, then a signal wire pin angle 8-6 of the module is welded on the PCBA control board 8-2 through tin soldering, the air tightness of a pipeline of a motor controller 1 is tested, a discharge resistor 5-2 is fixed on the bottom surface inside the box body 4 after the test is qualified, then two phase inserts 5-1 are fixed on the side surface of the box body 4 through screws, and a first Y capacitor 5-4 and a second Y capacitor 5-8 are respectively encapsulated in a capacitor of a support 5-3 In the groove 5-13, two magnetic rings 5-9 are arranged side by side in the magnetic ring groove 5-14 of the support 5-3, the magnetic ring groove 5-15 is made to be upward, the outer surfaces of the positive copper bar 5-6 and the negative copper bar 5-7 are wrapped with insulating adhesive tapes, then the support 5-3 is installed on the support 5-3, the support 5-3 is placed in the box body 4, the input end of the positive copper bar 5-6 and one lead of the discharge resistor 5-2 are fixed on the positive output terminal of the two-phase plug-in 5-1 through screws, the input end of the negative copper bar 5-7 and one lead of the discharge resistor 5-2 are fixed on the negative output terminal of the two-phase plug-in 5-1 through screws, the grounding copper sheet 5-5 is fixed at the through hole 5-12, and the needle angle of the grounding copper sheet faces to the direction of the first Y capacitor 5-4, meanwhile, a grounding copper sheet 5-5 is arranged at a through hole 5-12, the needle angle of the grounding copper sheet faces the direction of a second Y capacitor 5-8, two magnetic rings 5-9 are arranged above magnetic ring grooves 5-14 of a support 5-3 side by side, magnetic ring grooves 5-15 face downwards, a layer of silica gel pad 5-10 is arranged above the magnetic rings 5-9, a magnetic ring cover 5-11 is arranged above the silica gel pad 5-10, the magnetic ring cover 5-11, the support 5-3 and the grounding copper sheet 5-5 are simultaneously fixed on a box body 4 through screws, then a thin film capacitor 6 is fixed at one side inside the box body 4, one end of a terminal fixing support 8-3 is fixed on the box body 4, a grounding terminal 6-4 of the thin film capacitor 6 and the terminal fixing support 8-3 are simultaneously fixed on the box body 4, fixing an anode input terminal 6-2 and a cathode input terminal 6-3 of a film capacitor 6 and the output ends of an anode copper bar 5-6 and a cathode copper bar 5-7 on a terminal fixing support 8-3 through screws respectively, fixing an output terminal 6-5 of the film capacitor 6 and a direct current input terminal 8-7 of a power module 8-1 on the terminal fixing support 8-3 through screws, sequentially placing the middle part of a first copper bar 12-1 in a groove of a first copper bar seat 12-3, adhering a copper bar cover 12-5 on the first copper bar seat 12-3 through glue, enabling the input terminal of the first copper bar 12-1 to penetrate through three holes of a current sensor 9 respectively, fixing the current sensor 9 on the power module 8-1, and fixing the input terminal of the first copper bar 12-1 and a three-phase input terminal 8-5 of the power module through screws respectively Fixing a second copper bar seat 12-4 on the bottom surface 4-2 of the box body on the current sensor 9, positioning the middle part of the second copper bar 12-2 by a groove on the second copper bar seat 12-4, fixing the other end of a first copper bar 12-1 with one end of the second copper bar 12-2 by screws respectively, carrying out an insulation and pressure resistance test on the motor controller 1 after the test is finished, pre-locking a top box cover 7 on the top surface 4-1 of the box body by two screws after the test is qualified, then axially moving the motor controller 1 along the motor body 2 to ensure that the input end of a motor input copper bar 2-2 of the motor body 2 enters the box body 4 and is respectively aligned with a hole at one end of the second copper bar 12-2 of the motor controller 1, and then fixing two support legs on the side surface of the motor controller 1 at two threaded holes on the front end surface of the motor body 2 by bolts, and ensuring that the side surface of the motor controller 1 with the support legs is tightly attached to the motor wire holder 2-1, fixing two support legs on one side of the bottom surface of the motor controller 1 on the motor body 2 through bolts, fixing the input end of a motor input copper bar 2-2 of the motor body 2 with one end of a second copper bar 12-2 of the motor controller 1 through screws respectively, fixing a bottom box cover 13 on the bottom surface 4-2 of the box body, carrying out insulation and pressure resistance test on the assembled motor controller 1 and the assembled motor body 2, fixing a top box cover 7 on the top surface 4-1 of the box body after the test is qualified, and finally assembling the motor controller 1, the motor body 2 and the motor assembly tool 3.

In addition, it should be noted that the specific embodiments described in the present specification may have different names, and the above descriptions in the present specification are only illustrations of the structures of the present invention. All equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the invention. Various modifications or additions may be made to the described embodiments or methods may be similarly employed by those skilled in the art without departing from the scope of the invention as defined in the appending claims.

Claims (10)

1. A high-power-density oil-cooled motor assembly comprises a motor controller (1), a motor body (2) and a motor assembly tool (3), wherein the motor controller (1) is provided with a box body (4), an oil pipe joint (11) is arranged outside the box body (4) and is connected with an oil-cooled pipeline of the motor body (2), and the high-power-density oil-cooled motor assembly is characterized in that the motor assembly tool (3) is connected with the side end of the motor body (2), and the motor controller (1) is fixed at the upper ends of the motor assembly tool (3) and the motor body (2);

the motor wiring box is characterized in that a three-phase output assembly (12) is arranged in the box body (4), a motor wiring seat (2-1) is arranged on the motor body (2-1), a motor input copper bar (2-2) is arranged in the motor wiring seat (2-1), the motor input copper bar (2-2) enters the box body (4) through being clamped with the three-phase output assembly (12), the motor body (2) is fixed on the motor controller (1), the motor input copper bar (2-2) and the motor wiring seat (2-1) are sealed, and a sealing ring is adopted between the matching surfaces of the motor wiring seat (2-1) and the box body (4) to seal and compress.

2. The high-power-density oil-cooled motor assembly according to claim 1, wherein the box body (4) is further provided with a power component (8) and a current sensor (9), the three-phase output component (12) comprises a first copper bar (12-1) and a second copper bar (12-2), one end of the first copper bar (12-1) passes through the current sensor (9) and is electrically connected with the power component (8), the other end of the first copper bar is electrically connected with the second copper bar (12-2), the three-phase output component (12) is positioned at the lower part of the box body (4), the first copper bar (12-1), the second copper bar (12-2) and the motor input copper bar (2-2) are all three-phase copper bars, the motor input copper bar (2-2) is electrically connected with the second copper bar (12-2), and the second copper bar (12-2) is positioned below the first copper bar (12-1), the copper bar box is characterized by further comprising a copper bar cover (12-5), a first copper bar seat (12-3) and a second copper bar seat (12-4), wherein the second copper bar seat (12-4) is located below the first copper bar seat (12-3), the second copper bar seat (12-4) is fixed to the bottom surface of the box body (4), the copper bar cover (12-5) is fixed to the first copper bar seat (12-3) through bonding, and the first copper bar (12-1) and the second copper bar (12-2) are respectively fixed to grooves of the first copper bar seat (12-3) and the second copper bar seat (12-4).

3. The high-power-density oil-cooled motor assembly according to claim 2, wherein the box body (4) further comprises a two-phase input component (5), a thin film capacitor (6), a top box cover (7) and a signal plug-in component (10), the power component (8) is located in the middle of the box body (4), the power component (8) is located above the three-phase output component (12), the current sensor (9) is located on the side face of the power component (8), the two-phase input component (5) is located on one side of the power component (8), the thin film capacitor (6) is located on the other side of the power component (8), the input end of the thin film capacitor (6) is electrically connected with the output end of the two-phase input component (5), and the output end of the thin film capacitor is electrically connected with the two-phase input end of the power component (8).

4. A high power density oil cooled motor assembly as in claim 3, the two-phase input assembly (5) comprises two-phase plug-in components (5-1), a discharge resistor (5-2) and a support (5-3), wherein the support (5-3) is provided with a positive copper bar (5-6) and a negative copper bar (5-7), the two-phase plug-in components (5-1) are fixed on the outer surface of one side of the box body (4), the discharge resistor (5-2) is positioned below the two-phase plug-in components (5-1) and fixed on the box body (4), the discharge resistor (5-2) is provided with two lead wires, one of the lead and the input end of the positive copper bar (5-6) is electrically connected with the positive output terminal of the two-phase plug-in (5-1), and the other lead and the input end of the negative copper bar (5-7) are electrically connected with the negative output terminal of the two-phase plug-in (5-1).

5. The high-power-density oil-cooled motor assembly according to claim 4, wherein a capacitor groove (5-13) and a through hole (5-12) are formed in the middle and at one end of the support (5-3), a first Y capacitor (5-4) and a second Y capacitor (5-8) are fixed in the capacitor groove (5-13), a grounding copper sheet (5-5) is arranged in the through hole (5-12), and the grounding copper sheet (5-5) and the support (5-3) are fixed on the box body (4) through screws.

6. The high-power-density oil-cooled motor assembly according to claim 5, wherein the input end of the positive copper bar (5-6) is provided with a pin angle of the positive copper bar, the first Y capacitor (5-4) is provided with two leads, one lead is electrically connected with the pin angle of the positive copper bar (5-6), and the other lead is electrically connected with the grounding copper sheet (5-5) on the same side; the input end of the negative copper bar (5-7) is provided with a negative copper bar pin angle, the second Y capacitor (5-8) is provided with two leads, one lead is electrically connected with the negative copper bar pin angle of the negative copper bar (5-7), and the other lead is electrically connected with the grounding copper sheet (5-5) on the same side.

7. The high power density oil-cooled motor assembly according to claim 5, wherein the other end of the support (5-3) is provided with a magnetic ring groove (5-14), two magnetic rings (5-9) are arranged in the magnetic ring groove (5-14) side by side, one side of the magnetic ring (5-9) is provided with a magnetic ring groove (5-15), the positive copper bar (5-6) and the negative copper bar (5-7) sequentially penetrate through the magnetic ring groove (5-15) and the edge of the magnetic ring groove (5-14), and a silicone pad (5-10) and a magnetic ring cover (5-11) are sequentially arranged above the magnetic ring (5-9).

8. The high-power-density oil-cooled motor assembly according to claim 4, wherein one side surface of the thin-film capacitor (6) is a potting surface (6-1), the potting surface (6-1) is provided with a positive input terminal (6-2), a negative input terminal (6-3), a ground terminal (6-4) and an output terminal (6-5), the output terminal of the positive copper bar (5-6) is electrically connected with the positive input terminal (6-2) of the thin-film capacitor (6), and the output terminal of the negative copper bar (5-7) is electrically connected with the negative input terminal (6-3) of the thin-film capacitor (6).

9. The high-power-density oil-cooled motor assembly according to claim 8, wherein the power component (8) comprises a power module (8-1), a PCBA control board (8-2) and a terminal fixing support (8-3), the power module (8-1) is located on the upper surface of the PCBA control board (8-2), the terminal fixing support (8-3) is arranged at one end of the PCBA control board (8-2), the power module (8-1) comprises a direct current input terminal (8-7) and a three-phase input terminal (8-5), the direct current input terminal (8-7) and an output terminal (6-5) of the thin film capacitor (6) are fixed on the terminal fixing support (8-3) through screws, and the terminal fixing support (8-3) is fixed on the box body (4), a bottom box cover (13) is arranged at the bottom of the box body (4), and the bottom box cover (13) is fixed on the bottom surface of the box body (4) through screws and sealed with the bottom surface of the box body (4).

10. The high-power-density oil-cooled motor assembly according to claim 1, wherein the matching surfaces of the motor connector base (2-1) and the box body (4) are sealed and pressed by sealing rings, the front end of the motor body (2) is provided with two oil inlet pipes, one of the oil inlet pipes is communicated with the motor rotating shaft, cooling oil is introduced into the motor rotating shaft and is sprayed out from an oil spray hole in the center of the rotating shaft, and the other oil inlet pipe is positioned at the upper edge of an end cover of the motor body (2), so that direct cooling of an end winding is realized.

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