CN220108555U - Motor controller - Google Patents

Abstract

The utility model relates to a motor controller, comprising: a lower housing provided with a sinking groove; the water cooling plate is connected with the lower shell and is provided with an upper sinking groove, and the upper sinking groove and the sinking groove are enclosed to form a flow passage; an upper cover plate, the lower shell of which is connected; still include power module, film electric capacity and wave filter, power module sets up in the top one side of water-cooling board, film electric capacity and wave filter level set up in the below of water-cooling board, film electric capacity's first anodal copper bar and first negative pole copper bar are naked, wave filter's second anodal copper bar and second negative pole copper bar are naked, and all be provided with insulating heat conduction bed course between first anodal copper bar and the water-cooling board, between the lateral wall of second negative pole copper bar and subsidence groove and between the inside wall of the bottom one side of second anodal copper bar and lower casing. The utility model can rapidly dissipate the heat of the film capacitor and the filter while ensuring the cooling effect on the power module, thereby ensuring higher cooling efficiency and better cooling effect.

Description

Motor controller

Technical Field

The utility model relates to the technical field of motors, in particular to a motor controller.

Background

The motor controller is a device for controlling energy transmission between a power supply and a driving motor, and a circuit of the motor controller is generally composed of a control signal interface circuit, a driving motor control circuit and a driving circuit. The motor controller has the functions of, but not limited to, converting the electric energy stored in the power storage battery into the electric energy required by the driving motor according to instructions such as gears, throttle, brake and the like, so as to control the starting operation, advancing and retreating speed, climbing force and other running states of the electric vehicle; or will assist in braking the electric vehicle and store some of the braking energy in the power storage battery.

The cooling mode of the motor controller comprises water cooling, in the existing water cooling scheme of the motor controller, the relatively high heat loss power electronic device IGBT module is mainly cooled, meanwhile, the single electrode of the film capacitor is cooled, the overall cooling efficiency of the motor controller is low, and the cooling effect is poor.

Disclosure of Invention

Based on the above, the utility model provides a motor controller to solve the problems of low cooling efficiency and poor cooling effect of the whole motor controller in the prior art.

The present utility model provides a motor controller including:

the lower shell is provided with an opening at one side of the top and a closed bottom, the middle part of the lower shell is provided with a sinking groove, and a water inlet pipe and a water outlet pipe which are communicated with the sinking groove are arranged;

the water cooling plate is arranged in the middle of the water cooling plate to form a water cooling space and is connected with the lower shell, the water cooling plate is provided with an upper sinking groove, and the upper sinking groove and the sinking groove are arranged in an involution manner and form a runner communicated with the water cooling space in an enclosing manner;

the upper cover plate is arranged on one side of the top of the lower shell in a covering manner and is connected with the lower shell;

the motor controller further comprises a power module, a film capacitor and a filter, wherein the power module is arranged on one side of the top of the water cooling plate, the film capacitor and the filter are arranged in the lower shell and horizontally arranged below the water cooling plate, the film capacitor comprises a first positive copper bar and a first negative copper bar, the filter comprises a second positive copper bar and a second negative copper bar, the first positive copper bar, the first negative copper bar, the second positive copper bar and the second negative copper bar are exposed, and insulation heat conduction cushion layers are arranged between the first positive copper bar, the first negative copper bar and the water cooling plate, between the second negative copper bar and the outer side wall of the sinking groove and between the second positive copper bar and the inner side wall of one side of the bottom of the lower shell.

In one embodiment, a first cooling point is formed between the thin film capacitor and the water cooling plate, a second cooling point is formed between the filter and the outer side wall of the sink tank, and the first cooling point and the second cooling point are distributed in sequence along the direction of the water inlet pipe towards the water outlet pipe.

In one embodiment, the first positive electrode copper bar is at least partially exposed at one side of the top of the thin film capacitor, and the insulating heat conducting cushion layer between the first positive electrode copper bar and the first negative electrode copper bar and the water cooling plate is arranged in a plate shape and covers the first positive electrode copper bar and the first negative electrode copper bar at the same time.

In one embodiment, the power module is detachably connected with the water cooling plate, and is at least partially embedded in the water cooling space, and a water cooling rib is arranged at a part of the power module embedded in the water cooling space.

In one embodiment, a first seal is disposed between the power module and the water cooled plate.

In one embodiment, the water inlet pipe and the water outlet pipe are both vertically arranged and horizontally arranged at two ends of the thin film capacitor along the first direction.

In one embodiment, the thin film capacitor and the filter are disposed horizontally along a second direction, the second direction intersecting the first direction.

In one embodiment, the second direction is perpendicular to the first direction.

In one embodiment, the lower housing is integrally formed, and the inner side wall of one side of the bottom is a plane, and the water cooling plate is detachably connected with the lower housing.

In one embodiment, a second seal is provided between the water cooled plate and the lower housing.

According to the utility model, the power module is arranged on one side of the top of the water cooling plate, the film capacitor and the filter are horizontally arranged below the water cooling plate, and the film capacitor and the filter are contacted with the exposed first positive electrode copper bar, the exposed first negative electrode copper bar, the exposed second positive electrode copper bar and the exposed second negative electrode copper bar through the insulating heat conducting cushion layer, so that the cooling effect of the power module is ensured, and meanwhile, the heat of the film capacitor and the filter is rapidly emitted, so that the higher cooling efficiency is ensured, and meanwhile, the better cooling effect is realized.

Drawings

Fig. 1 is a schematic structural diagram of a motor controller according to an embodiment of the present utility model;

FIG. 2 is a longitudinal cross-sectional view of a portion of a motor controller provided in accordance with one embodiment of the present utility model;

FIG. 3 is an exploded view of the interior of a motor controller according to one embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a filter of a motor controller according to an embodiment of the present utility model;

fig. 5 is an enlarged view of a portion a in fig. 2;

fig. 6 is an enlarged view of the portion B in fig. 2.

Reference numerals: 100. a lower housing; 110. a sinking groove; 111. a second sealed sink; 120. a water inlet pipe; 130. a water outlet pipe; 200. a water cooling plate; 210. a sinking groove; 220. a first sealed sink; 300. an upper cover plate; 400. a power module; 410. water cooling ribs; 500. a thin film capacitor; 510. a first positive copper bar; 520. a first negative copper bar; 600. a filter; 610. a second positive copper bar; 620. a second negative copper bar; 700. an insulating heat conducting cushion layer; 800. a first seal; 900. and a second seal.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It should be noted that the illustrations provided in the present embodiment are merely schematic illustrations of the basic idea of the present utility model.

The structures, proportions, sizes, etc. shown in the drawings attached hereto are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are particularly adapted to the specific details of construction and the use of the utility model, without departing from the spirit or essential characteristics thereof, which fall within the scope of the utility model as defined by the appended claims.

References in this specification to orientations or positional relationships as "upper", "lower", "left", "right", "intermediate", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc., are based on the orientation or positional relationships shown in the drawings, are also for convenience of description only, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore are not to be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present utility model provides a motor controller, as shown in fig. 1 to 6, including:

a lower housing 100 having an opening at a top side and a closing at a bottom side, a sinking tank 110 being provided at a middle portion of the lower housing 100, and a water inlet pipe 120 and a water outlet pipe 130 communicating with the sinking tank 110;

the water cooling plate 200 is arranged in the middle to form a water cooling space and is connected with the lower shell 100, the water cooling plate 200 is provided with an upper sinking groove 210, and the upper sinking groove 210 and the sinking groove 110 are arranged in an involution manner and form a runner communicated with the water cooling space in an enclosing manner;

an upper cover plate 300 which is provided to cover one side of the top of the lower case 100 and is connected to the lower case 100;

the motor controller further comprises a power module 400, a film capacitor 500 and a filter 600, wherein the power module 400 is arranged on one side of the top of the water cooling plate 200, the film capacitor 500 and the filter 600 are arranged in the lower shell 100 and horizontally arranged below the water cooling plate 200, the film capacitor 500 comprises a first positive copper bar 510 and a first negative copper bar 520, the filter 600 comprises a second positive copper bar 610 and a second negative copper bar 620, the first positive copper bar 510, the first negative copper bar 520, the second positive copper bar 610 and the second negative copper bar 620 are exposed, and an insulating heat conducting cushion layer 700 is arranged between the first positive copper bar 510 and the first negative copper bar 520 and the water cooling plate 200, between the second negative copper bar 620 and the outer side wall of the sinking groove 110 and between the second positive copper bar 610 and the inner side wall of the bottom side of the lower shell 100.

As shown in fig. 1 to 3, in the present embodiment, the lower case 100 may be exemplarily illustrated as a shape with a hollow rectangular parallelepiped with a top wall removed, and the upper cover 300 is a top wall with a rectangular parallelepiped removed, covers a top side of the lower case 100, and is detachably connected to the lower case 100, so as to facilitate the disassembly and assembly of the power module 400, the thin film capacitor 500, the filter 600, and the like. In order to enhance the modal frequency of the upper cover plate 300 to avoid deformation, the upper cover plate 300 may be further provided with criss-cross reinforcing ribs.

As shown in fig. 2, the sink 110 may be provided at the inner side of the lower case 100 and at the middle of the lower case 100. The lower case 100 has a rectangular frame shape with its notch disposed upward in the vertical direction. The water cooling plate 200 is connected to the middle of the lower case 100, and is provided in a shape similar to a rectangle of the inside of the lower case 100. The water cooling plate 200 is provided with an upper sink 210 disposed opposite to the sink 110, the upper sink 210 has the same shape as the sink 110, and its notch is disposed downward in the vertical direction to form a flow path with the sink 110. Meanwhile, the water cooling plate 200 is hollow to form a water cooling space, and the inner side of the flow channel is communicated with the water cooling space. The water inlet pipe 120 and the water outlet pipe 130 are both provided on the lower housing 100 and are both communicated with the sink 110 for water-cooling medium to enter and exit the flow passage and the water-cooling space, respectively.

As shown in fig. 2 and 3, the water cooling medium may water-cool the power module 400, the thin film capacitor 500, and the filter 600 as it flows in the flow passage and the water cooling space. In detail, since the power module 400 is disposed at the top side of the water cooling plate 200, which is in direct contact with the water cooling plate 200, the water cooling medium may directly water-cool the power module 400 to absorb heat generated therefrom. In this embodiment, two power modules 400 may be horizontally disposed along the length direction of the water cooling plate 200, and at this time, the motor controller is simultaneously applicable to the motor and the generator, and the two power modules 400 are respectively an MCU power module 400 and a GCU power module 400.

As shown in fig. 3 and 4, at the same time, since the thin film capacitor 500 and the filter 600 are both disposed under the water-cooling plate 200, and the first positive copper bar 510 and the first negative copper bar 520 of the thin film capacitor 500 are exposed to the outside and contact with one side of the bottom of the water-cooling plate 200 through the insulating heat conductive pad layer 700, a heat dissipation channel with low thermal resistance is formed between the thin film capacitor 500 and the water-cooling medium. Similarly, since the second positive electrode copper bar 610 and the second negative electrode copper bar 620 of the filter 600 are exposed to the outside and respectively contact with the inner sidewall of the bottom side of the lower case 100 and the outer sidewall of the sink 110 through the insulating and heat conducting pad 700, the heat generated by the filter 600 can be more directly transferred to the water cooling medium. The insulating and heat conducting pad layer 700 is silica gel or joint compound with high dielectric strength, high CTI (relative tracking index) and high thermal conductivity.

In summary, in the present utility model, the power module 400 is disposed on one side of the top of the water-cooling plate 200, and the thin film capacitor 500 and the filter 600 are disposed horizontally below the water-cooling plate 200, and the insulating heat conducting pad layer 700 contacts the exposed first positive copper bar 510, the first negative copper bar 520, the second positive copper bar 610 and the second negative copper bar 620, so that the cooling effect of the power module 400 is ensured, and the heat of the thin film capacitor 500 and the filter 600 is rapidly dissipated, thereby ensuring higher cooling efficiency and better cooling effect.

Specifically, a first cooling point is formed between the thin film capacitor 500 and the water cooling plate 200, and a second cooling point is formed between the filter 600 and the outer sidewall of the sink 110, and the first cooling point and the second cooling point are sequentially distributed along the direction of the water inlet pipe 120 toward the water outlet pipe 130.

As shown in fig. 3 and fig. 4, in this embodiment, the first cooling point is illustratively a contact point between the first positive copper bar 510 and the first negative copper bar 520 and the corresponding insulating heat conducting pad 700; similarly, the second cooling point is the contact point between the second negative copper bar 620 and the corresponding insulating and heat conducting pad layer 700. If the inlet pipe 120 is defined as upstream of the flow direction of the water-cooling medium and the outlet pipe 130 is defined as downstream of the flow direction of the water-cooling medium, the first cooling point is located close to the upstream of the flow direction of the water-cooling medium, and the second cooling point is located close to the downstream of the flow direction of the water-cooling medium. For the two power modules 400 of the present embodiment, the MCU power module 400 may be disposed upstream, and the GCU power module 400 may be disposed downstream, that is, the MCU power module 400 and the GCU power module 400 are sequentially adjacent to the water inlet pipe 120 and the water outlet pipe 130 when disposed horizontally.

It can be appreciated that, since the cooling point near the water inlet pipe 120 can have a better cooling effect, the thin film capacitor 500 and the filter 600 can be cooled in turn according to the heat loss; when the MCU power module 400 and the GCU power module 400 are sequentially arranged along the flow direction of the water-cooling medium, the cooling effect of the MCU power module 400 with higher heat loss can be ensured.

Specifically, the first positive electrode copper bar 510 is at least partially exposed at one side of the top of the thin film capacitor 500, and the insulating and heat conducting pad layer 700 located between the first positive electrode copper bar 510 and the first negative electrode copper bar 520 and the water cooling plate 200 is in a plate shape, and covers the first positive electrode copper bar 510 and the first negative electrode copper bar 520 at the same time.

As shown in fig. 3, in this embodiment, the first positive electrode copper bar 510 may be provided with two exposed portions, wherein one exposed portion is disposed side by side with the first negative electrode copper bar 520 and is used for connecting with the filter 600, the other exposed portion is disposed on one side of the top of the thin film capacitor 500 and is rectangular, the length direction thereof is the length direction of the water cooling plate 200, and the aforementioned first positive electrode copper bar 510 and first negative electrode copper bar 520 are disposed at one end in the length direction thereof. At this time, the insulating and heat conducting pad layer 700 corresponding to the first positive electrode copper bar 510 and the first negative electrode copper bar 520 may be configured as an L-shaped plate structure, and simultaneously cover and shield the first positive electrode copper bar 510 and the first negative electrode copper bar 520.

It can be appreciated that, in this embodiment, the first positive electrode copper bar 510 can be ensured to have a larger contact area with the insulating heat conducting pad layer 700, so that heat generated by the thin film capacitor 500 can be rapidly transferred to the sump medium, so as to ensure the cooling effect on the thin film capacitor 500.

Specifically, the power module 400 is detachably connected with the water cooling plate 200, and is at least partially embedded in the water cooling space, and a portion of the power module 400 embedded in the water cooling space is provided.

As shown in fig. 2 and 3, in the present embodiment, it is exemplarily illustrated that a top side of the water-cooling plate 200 may be provided with a notch for embedding the power module 400, which corresponds to the power module 400, and may be provided in a rectangular shape. One end of the bottom of the power module 400 passes through the notch and stretches into the water cooling space to seal the notch of the water cooling plate 200, thereby avoiding leakage of water cooling medium. Water cooling ribs 410 may be disposed at one end of the bottom of the power module 400, and extend into the water cooling space to directly contact with the water cooling medium. The water cooling ribs 410 may be provided in a cylindrical shape and a plurality of water cooling ribs may be provided in a rectangular array.

It can be appreciated that, in this embodiment, the power module 400 is embedded in the water cooling space, so that the water cooling medium is directly contacted with the power module 400, so as to improve the cooling effect of the water cooling medium on the power module 400; by providing the water cooling ribs 410, the cooling rate of the power module 400 can be further increased.

More specifically, a first seal 800 is provided between the power module 400 and the water cooling plate 200.

As shown in fig. 2 and 5, in the present embodiment, it is exemplarily illustrated that the top side of the water-cooling plate 200 may be provided with a first seal recess 220 at the outer edge of the notch thereof, the first seal recess 220 corresponding to the notch. The first sealing member 800 may be provided in a rectangular frame shape, and the bottom end is provided in the first sealing sink 220. The top end of the first sealing member 800 is abutted against the outer edge of the power module 400, and is deformed under the extrusion of the power module 400, so as to seal the connection between the power module 400 and the water cooling plate 200.

It can be appreciated that, in this embodiment, by providing the first sealing member 800, the air tightness of the connection portion of the power module 400 when the power module is embedded in the water cooling plate 200 can be ensured, so as to avoid the leakage of the water cooling medium.

Specifically, the water inlet pipe 120 and the water outlet pipe 130 are vertically disposed, and horizontally disposed at both ends of the thin film capacitor 500 along the first direction.

As shown in fig. 2 and 3, in the present embodiment, it is exemplarily illustrated that the first direction may be a length direction of the water cooling plate 200, and the length of the thin film capacitor 500 is smaller than the length of the water cooling plate 200, and the water inlet pipe 120 and the water outlet pipe 130 are vertically disposed at both ends of the length direction of the thin film capacitor 500.

It can be appreciated that, in this embodiment, by arranging the water inlet pipe 120 and the water outlet pipe 130 at two ends of the thin film capacitor 500 and vertically arranging them, the positions of the water inlet pipe 120, the water outlet pipe 130 and the thin film capacitor 500 can be more reasonably laid out, so as to avoid oversized motor controller in a certain direction.

More specifically, the thin film capacitor 500 and the filter 600 are horizontally disposed along a second direction, which intersects the first direction.

As shown in fig. 2 and 3, in the present embodiment, illustratively, the intersection of the second direction with the first direction also means that the thin film capacitor 500 and the filter 600 are not horizontally disposed along the length direction of the water-cooled plate 200. In view of this, the present embodiment further improves the space utilization of the inner space of the lower housing 100 of the motor controller on the horizontal reference plane. When the second direction is perpendicular to the first direction, the thin film capacitor 500 and the filter 600 are horizontally disposed along the width direction of the water-cooling plate 200, and at this time, the space utilization of the motor controller is further improved.

Specifically, the lower housing 100 is integrally formed, and the inner sidewall of the bottom side is formed as a plane, and the water cooling plate 200 is detachably connected with the lower housing 100.

As shown in fig. 1 and 2, in the present embodiment, since the water cooling plate 200 is detachably connected to the lower case 100, when the thin film capacitor 500 and the filter 600 are assembled, the thin film capacitor 500 and the filter 600 may be assembled into the lower case 100 from top to bottom, and then the water cooling plate 200 is connected to the lower case 100, and at this time, the lower case 100 may be manufactured in an integral manner, instead of a split-type manufacturing manner, for example, the lower case 100 includes a case with two open ends and a lower cover plate disposed at one end of the bottom of the case. The integrated molding has the advantages that: the lower side of the bottom of the lower housing 100 may be reinforced with a lower height to ensure that the lower side of the bottom of the lower housing 100 is not easily deformed. In the split preparation mode, the mode frequency of the motor controller can be guaranteed due to the fact that the lower cover plate is required to be provided with relatively high reinforcing ribs, and therefore the Z-direction height of the motor controller can be reduced. Meanwhile, since the inner sidewall of the bottom side of the lower case 100 is disposed to be planar, when the second positive electrode copper bar 610 contacts the inner sidewall of the bottom side of the lower case 100 through the insulating and heat conductive pad layer 700, it is possible to have a larger contact area, and thus it is possible to improve the cooling effect of the filter 600 in a limited space.

More specifically, a second seal 900 is provided between the water cooling plate 200 and the lower case 100.

As shown in fig. 2 and 6, in the present embodiment, it is exemplarily illustrated that the second sealing sink 111 may be provided on the sidewall of the top side of the sink 110, and the second sealing sink 111 may be also provided in a frame shape and provided at the outer edge of the sink 110. And the shape of the second seal 900 is the same as that of the second seal pocket 111, and the bottom end is disposed in the second seal pocket 111. The top side of the second seal 900 may be abutted against the water-cooling plate 200 and deformed by the extrusion of the water-cooling plate 200 to seal the junction between the water-cooling plate 200 and the lower case 100.

It is understood that the present embodiment can improve the air tightness of the connection between the water-cooling plate 200 and the lower case 100 by providing the second seal 900.

The implementation principle of the motor controller provided by the utility model is as follows:

during assembly, the thin film capacitor 500 and the filter 600 are assembled in the lower box from top to bottom, and at this time, an insulating heat conducting cushion layer 700 needs to be arranged between the second positive electrode copper bar 610 and the inner side wall of one side of the bottom of the lower box and between the second negative electrode copper bar 620 and the outer side wall of the sinking groove 110; and then the water-cooling plate 200 is connected with the lower case 100, and a second sealing member 900 is required to be arranged at the connection position of the water-cooling plate 200 and the lower case, and an insulating heat conducting cushion layer 700 is required to be arranged between the water-cooling plate 200 and the first positive electrode copper bar 510 and the second negative electrode copper bar 620. And then the power module 400 is connected with the water cooling plate 200, and a first sealing member 800 is required to be arranged at the connection position of the power module and the water cooling plate 200. The upper cover 300 is then closed onto the lower housing 100. When the motor controller needs to be water-cooled, the water-cooling medium enters the flow channel and the water-cooling space from the water inlet pipe 120 and is discharged from the water outlet pipe 130, and when the water-cooling medium flows, the water-cooling medium can water-cool the power module 400, the thin film capacitor 500 and the filter 600.

According to the utility model, the power module 400 is arranged on one side of the top of the water cooling plate 200, the thin film capacitor 500 and the filter 600 are horizontally arranged below the water cooling plate 200, and meanwhile, the thin film capacitor 500 and the filter 600 are contacted with the exposed first positive electrode copper bar 510, the exposed first negative electrode copper bar 520, the exposed second positive electrode copper bar 610 and the exposed second negative electrode copper bar 620 through the insulating heat conducting cushion layer 700, so that the cooling effect of the power module 400 is ensured, and meanwhile, the heat of the thin film capacitor 500 and the filter 600 is rapidly dissipated, so that the higher cooling efficiency is ensured, and meanwhile, the better cooling effect is achieved.

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.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A motor controller, the motor controller comprising:

a lower shell (100) with an opening at one side of the top and a closing at one side of the bottom, wherein a sinking groove (110) is arranged in the middle of the lower shell (100), and a water inlet pipe (120) and a water outlet pipe (130) which are communicated with the sinking groove (110) are arranged;

the water cooling plate (200) is arranged in the middle of the water cooling plate to form a water cooling space and is connected with the lower shell (100), the water cooling plate (200) is provided with an upper sinking groove (210), and the upper sinking groove (210) and the sinking groove (110) are arranged in an involution mode and form a runner communicated with the water cooling space in an enclosing mode;

an upper cover plate (300) which is provided on the top side of the lower case (100) in a covering manner and is connected to the lower case (100);

the motor controller further comprises a power module (400), a film capacitor (500) and a filter (600), wherein the power module (400) is arranged on one side of the top of the water cooling plate (200), the film capacitor (500) and the filter (600) are arranged in the lower shell (100) and horizontally arranged below the water cooling plate (200), the film capacitor (500) comprises a first positive copper bar (510) and a first negative copper bar (520), the filter (600) comprises a second positive copper bar (610) and a second negative copper bar (620), the first positive copper bar (510) and the first negative copper bar (520) are exposed, and the first positive copper bar (510) and the first negative copper bar (520) are arranged between the water cooling plate (200) and the second negative copper bar (620) and the bottom of the second positive copper bar (700) are arranged between the second positive copper bar (620) and the bottom of the lower shell (100).

2. The motor controller according to claim 1, characterized in that a first cooling point is formed between the film capacitor (500) and the water cooling plate (200), a second cooling point is formed between the filter (600) and the outer side wall of the sink (110), and the first cooling point and the second cooling point are sequentially distributed along the direction of the water inlet pipe (120) toward the water outlet pipe (130).

3. The motor controller according to claim 1, wherein the first positive electrode copper bar (510) is at least partially exposed at a top side of the thin film capacitor (500), and the insulating and heat conducting pad layer (700) between the first positive electrode copper bar (510) and the first negative electrode copper bar (520) and the water cooling plate (200) is arranged in a plate shape and covers the first positive electrode copper bar (510) and the first negative electrode copper bar (520) at the same time.

4. The motor controller according to claim 1, wherein the power module (400) is detachably connected to the water cooling plate (200) and is at least partially embedded in the water cooling space, and a water cooling rib (410) is disposed on a portion of the power module (400) embedded in the water cooling space.

5. The motor controller according to claim 4, characterized in that a first seal (800) is provided between the power module (400) and the water cooling plate (200).

6. The motor controller according to claim 1, wherein the water inlet pipe (120) and the water outlet pipe (130) are vertically arranged and horizontally arranged at both ends of the thin film capacitor (500) along a first direction.

7. The motor controller according to claim 6, wherein the thin film capacitor (500) and the filter (600) are horizontally arranged along a second direction, the second direction intersecting the first direction.

8. The motor controller of claim 7, wherein the second direction is perpendicular to the first direction.

9. The motor controller according to claim 1, wherein the lower housing (100) is integrally formed and an inner sidewall of a bottom side is formed as a plane, and the water cooling plate (200) is detachably connected to the lower housing (100).

10. The motor controller according to claim 9, characterized in that a second seal (900) is provided between the water cooling plate (200) and the lower housing (100).