CN218125228U

CN218125228U - Motor controller

Info

Publication number: CN218125228U
Application number: CN202221998803.7U
Authority: CN
Inventors: 赵敬辉; 吴强; 羽永龙; 杨军
Original assignee: Xi'an Xinpai New Energy Vehicle Power Control Research Institute Co ltd
Current assignee: Xi'an Xinpai New Energy Vehicle Power Control Research Institute Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-12-23
Anticipated expiration: 2032-07-29

Abstract

The utility model discloses a motor controller, through opening the sunken recess that is used for cooperating bus-bar electric capacity and busbar copper bar at the radiator base, the layering is equipped with the heat conduction pad with MOS pipe pressure equipment on radiator base radiating bottom plate, be equipped with between MOS pipe bottom radiating surface and the radiator base radiating bottom plate, layering and radiator base radiating bottom plate fixed connection, the main control board counterpoint cartridge is on the main power board, can save or reduce high-frequency absorption electric capacity or MOS stress absorption circuit, reduce motor controller's volume; the MOS tube is inserted on the bus copper bar, the heat dissipation surface of the MOS tube is pressed on the heat dissipation bottom plate of the base of the heat radiator by using the pressing bar, and the pressing bar is limited by the mounting limiting structure, so that the deformation and the swing are avoided, and the uniform stress and heat dissipation of the MOS tube are ensured; the radiator base is provided with a groove for matching the bus capacitor with the bus copper bar, so that the height of the motor controller can be effectively reduced, and the bus capacitor sinks into the groove of the radiator base, thereby greatly improving the heat dissipation condition of the bus capacitor.

Description

Motor controller

Technical Field

The utility model belongs to the technical field of the motor, concretely relates to motor controller.

Background

With the development of science and technology, electric automobiles gradually enter our lives. The electric vehicle generates power because the electric vehicle does not burn gasoline, has the characteristics of environmental protection and little pollution, and is widely applied to places with higher requirements on environment, such as tourist attractions and the like. The existing electric vehicle is provided with an alternating current controller for converting a direct current power supply output by a storage battery into a three-phase alternating current power supply and driving a motor to rotate.

The current universal motor controller with 3-5 KW rating in the industry mainly comprises a low-power low-voltage MOS tube module group, a bus capacitor and control circuit, a driving circuit, a radiator base, a main power terminal copper bar and the like. As one of the core components of an electric automobile, the electric automobile is a decisive factor for the dynamic performance of the automobile. The electric vehicle obtains the requirement of the whole vehicle from a vehicle controller, obtains electric energy from a power battery pack, obtains current and voltage required by a control motor through the modulation of an inverter of the electric vehicle, and provides the current and the voltage for a motor, so that the rotating speed and the torque of the motor meet the requirement of the whole vehicle.

The ac motor controller structure used in the industry at present has the following disadvantages:

1. the space volume is relatively great, and power density is lower, and this on the car that the modern fast integration degree developed, is not enough to satisfy its demand, and in addition its weight is heavier, can not improve the availability factor of its whole car for new energy automobile.

2. The power MOS tube is inconvenient to press and mount, the number of screws is large, the mounting efficiency is low, and the batch production cost is high.

3. The sealing waterproof reliability is poor, the traditional sealing gasket mode is adopted, and the sealing gasket needs a die to be opened, so that the cost is increased additionally.

4. The installation of radiator base shell is inconvenient, and the screw need upwards come the locking from the controller bottom, must just can operate whole product upset like this to the screw thread need be attacked on plastic radiator base shell, and the reliability is very poor like this, and the thread smooth tooth probability is high a lot.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a motor controller to overcome prior art in motor controller bulky, power density is low and the unreliable problem of power MOS pipe pressure equipment.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

the utility model provides a motor controller, including the radiator base, radiator base top is provided with the main power board, the main power board front side is provided with and leads electrical pillar, bus capacitor is fixed in the main power board dorsal part with the copper bar that converges, the radiator base is opened and is used for cooperating bus capacitor and the sunken recess of copper bar that converges, MOS pipe is pegged graft on the copper bar that converges, the MOS pipe is through the pressure strip pressure equipment on radiator base radiating bottom plate, be equipped with the heat conduction pad between MOS pipe bottom radiating surface and the radiator base radiating bottom plate, layering and radiator base radiating bottom plate fixed connection, the main control board is counterpointed the cartridge on the main power board, main control board and radiator base fixed connection, main control board top is provided with radiator base shell, radiator base shell and radiator base fixed connection.

Preferably, the radiator base comprises a radiating bottom plate and a radiator base main body, and a sealing groove is formed between the radiating bottom plate of the radiator base and the radiator base main body.

Preferably, the edge of the radiator base is provided with a hole for fixedly connecting with the radiator base shell, and the radiating bottom plate of the radiator base is provided with an installation limiting structure.

Preferably, the installation limiting structure comprises a limiting block, a limiting groove and a stroke limiting column, the limiting block is arranged on the limiting groove, two ends of the pressing strip are fixedly connected with the limiting groove, the stroke limiting column is arranged on the radiator base, and the stroke limiting column is located on the outer side of the pressing strip.

Preferably, the main power board is a square structure with four concave corners matched with the limiting block for installing the limiting structure.

Preferably, the pressing strip is of a strip groove-shaped structure, through holes corresponding to the upper surface of the MOS tube are formed in the bottom of the groove of the pressing strip, and through holes for fixed connection are formed in the two ends of the pressing strip and the positions corresponding to the gaps of the MOS tube group.

Preferably, the main control board is provided with a control terminal, and is provided with a through hole corresponding to the conductive column on the main power board and a through hole for fixedly connecting with the heat dissipation bottom plate of the heat sink base.

Preferably, the corresponding position of the shell of the radiator base is provided with a through hole corresponding to the conductive column on the main power board, a through hole for fixedly connecting the radiator base and a through hole corresponding to the common control terminal on the main control board.

Preferably, the radiator base shell is provided with a fuse and a respirator, and the upper cover of the respirator is provided with an explosion-proof valve cover.

Preferably, the radiator base shell and the radiator base are sealed by pouring and pouring sealant, the radiator base shell and the conductive column are sealed by pouring and pouring sealant, and the radiator base shell and the control terminal are sealed by pouring sealant.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model relates to a motor controller, through opening the recess that is used for cooperating bus-bar capacitance and busbar copper bar to sink at the radiator base, the MOS pipe is pegged graft on busbar copper bar, the layering is with MOS pipe pressure equipment on radiator base radiating bottom plate, be equipped with the heat conduction pad between MOS pipe bottom radiating surface and the radiator base radiating bottom plate, layering and radiator base radiating bottom plate fixed connection, the main control board is counterpointed the cartridge on the main power board, with radiator base fixed connection, main control board top is provided with radiator base shell, radiator base shell lid dress is on radiator base, both fixed connections, the MOS pipe of both sides is pegged graft on busbar copper bar, the MOS pipe of both sides belongs to same bridge arm, parallel connection, the MOS pipe parallel circuit symmetry of same bridge arm is high, flow equalization effect is good, direct current return circuit parasitic inductance is little simultaneously, can save or reduce high frequency absorption capacitance or MOS stress absorption circuit, reduce motor controller's volume; the MOS tube is inserted on the bus copper bar, the heat dissipation surface of the MOS tube is pressed on the heat dissipation bottom plate of the radiator base by using the pressing bar, the pressing bar is fixedly connected with the heat dissipation bottom plate of the radiator base, the pressing bar is limited by the installation limiting structure, deformation and swing cannot occur, and the uniform stress and heat dissipation of the MOS tube are ensured; bus capacitor and the sunken formula design of busbar, radiator base open have be used for cooperating bus capacitor and the sunken recess of busbar, can effectively reduce machine controller's height, and bus capacitor sinks to the radiator base recess in, has improved bus capacitor's the heat dissipation condition by a wide margin.

Furthermore, a laminated structure is adopted, and the main power board, the main control board, the pressing bar, the radiator base shell and other parts are vertically and downwards assembled and locked in a one-way mode, so that the layers of the motor controller are tightly matched, and the structural integrity is good.

Furthermore, a through hole corresponding to the public control terminal on the main control board is formed in the radiator base shell, the male control terminal is integrally designed with the independent radiator base shell and can be directly connected with the cable female head in an inserting mode, the problem that the cable female head and the radiator base shell which are universal in the industry need to be matched with an inserting needle and the problems of needle withdrawing, unreliable contact and the like caused by assembly accumulated tolerance are solved, and the problem that the common cable female head and the radiator base shell are installed and matched with each other is solved.

Furthermore, a pouring sealant is used for sealing between the radiator base shell and the radiator base, a pouring sealant is used for sealing between the radiator base shell and the conductive column, a pouring sealant is used for sealing between the radiator base shell and the control terminal, and the pouring sealant is used for sealing.

Drawings

Fig. 1 is an exploded view of the system structure in the embodiment of the present invention.

Fig. 2 is an assembly view of the molding, the power board and the heat sink base in the embodiment of the present invention.

Fig. 3 is an assembly view of the main control board in the embodiment of the present invention.

Fig. 4 is an assembly view of the heat sink base housing according to the embodiment of the present invention.

Fig. 5 is a bottom view of the heat sink base according to the embodiment of the present invention.

Fig. 6 is a view of the pouring sealant between the heat sink base casing and the heat sink base according to the embodiment of the present invention.

Fig. 7 is a view of the pouring sealant between the heat sink base housing and the conductive post according to the embodiment of the present invention.

Fig. 8 is a view of the pouring sealant between the heat sink base housing and the main control board terminal according to the embodiment of the present invention.

Fig. 9 is an assembly limit view of the pressing bar in the embodiment of the present invention.

Fig. 10 is a partial detailed view of an embodiment of the present invention.

Wherein: 1. a heat sink base; 2. a thermally conductive pad; MOS tube; 4. a main power board; 5, M4 fixing screws; 6. layering; 7. a main control board; 8. a first M3 set screw; 9. a heat sink base housing; 10. a fuse; 11. a respirator; 12. a second M3 set screw; 13. a conductive post; 14. a bus capacitor; 15. a bus bar copper; 16. a limiting block; 17. a limiting groove; 18. a stroke limiting post; 19. and (5) pouring a sealant.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it should be noted that when one component is considered to be "connected" to another component, it may be directly connected to the other component, or several components may exist at the same time. Unless defined otherwise, all 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. It should also be noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; either mechanically or electrically, and may be internal to both elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

It should be noted that, in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

As shown in figure 1, the utility model provides a motor controller, which comprises a radiator base 1, a main power plate 4 is arranged on the radiator base 1, a conductive column 13 is arranged on the front side of the main power plate 4, a bus capacitor 14 and a bus copper bar 15 are arranged on the back side of the main power plate 4 in an inverted form, a groove for placing the bus capacitor 14 and the bus copper bar 15 to sink is arranged on the radiator base 1, an MOS tube 3 is inserted on the bus copper bar 15, the MOS tube 3 is pressed on a radiating bottom plate of the radiator base 1 through a pressing strip 6, a heat conducting pad 2 is arranged between the radiating surface at the bottom of the MOS tube 3 and the radiating bottom plate of the radiator base 1, the pressing strip 6 is fixedly connected with the radiating bottom plate of the radiator base 1, a main control plate 7 is inserted on the main power plate 4 in an aligned manner, the main control board 7 is provided with a radiator base shell 9, the radiator base shell 9 is fixedly connected with the radiator base 1, specifically, bus copper bars 15 are fixed on the edges of two sides of the back side of the main power board 4 in an inverted manner, bus capacitors 14 are arranged between the bus steel bars 15 on two sides, MOS (metal oxide semiconductor) tubes on two sides of the back side of the main power board 4 are inserted into the bus copper bars 15, the MOS tubes on two sides of the back side of the main power board 4 belong to the same bridge arm and are connected in parallel, the MOS tube parallel loop of the same bridge arm has high symmetry degree and good current equalizing effect, and meanwhile, the parasitic inductance of a direct current loop is small, so that a high-frequency absorbing circuit or an MOS stress absorbing circuit can be saved or reduced, and the size of a motor controller is reduced; the pressing strip is fixedly connected with a heat dissipation bottom plate of the base of the heat radiator, and the pressing strip is limited by the mounting limiting structure, so that deformation and swing are avoided, and the uniform stress and heat dissipation of the MOS tube are ensured; bus capacitor and the sunken formula design of busbar, offer the recess that is used for cooperating bus capacitor and busbar on the radiator base 1, can effectively reduce machine controller's height, and bus capacitor sinks to the radiator base recess in, has improved bus capacitor's the heat dissipation condition by a wide margin.

As shown in fig. 2 and 5, a hole for fixedly connecting with a radiator base shell 9 is formed in the edge of a radiator base 1, an installation limiting structure is arranged on a radiating bottom plate of the radiator base 1, the installation limiting structure is arranged on the radiating bottom plate of the radiator base 1, and a structure which is matched and fixedly connected with a main power plate 4 and a main control plate 7 is arranged, the installation limiting structure comprises a limiting block 16, a limiting groove 17 and a stroke limiting column 18, the limiting block 16 is positioned on the limiting groove 17, two ends of a pressing strip 6 are fixedly connected with the limiting groove 17, the stroke limiting column 18 is arranged on the radiator base 1, and the stroke limiting column 18 is positioned outside the pressing strip 6; a sealing groove is formed between the heat dissipation bottom plate of the heat dissipation base 1 and the main body of the heat dissipation base 1, specifically, as shown in fig. 5, the bottom of the heat dissipation base 1 is of a grid structure, which is beneficial to heat dissipation of the heat dissipation base; the mounting limiting structure is used for limiting the swinging and deformation of the pressing strip 6, a hole matched with an M4 fixing screw is formed in the limiting groove 17, as shown in figure 9, a spring pad matched with the first M4 fixing screw 5 is arranged below the first M4 fixing screw, the M4 fixing screw is prevented from loosening, so that the pressing strip 6 is prevented from swinging, in addition, the problem that the screw needs to be locked upwards from the bottom of a controller and can be operated only by turning the whole product is solved, the problem that threads need to tap on a base shell of a plastic radiator to cause poor reliability is solved, the limiting groove 17 is connected through the M4 fixing screw, the pressing strip is prevented from swinging back and forth, a stroke limiting column 18 is arranged on the outer side of the pressing strip 6, the pressing strip is prevented from being deformed, the pressure generated by the pressing strip 6 on an MOS (metal oxide semiconductor) tube 3 is not changed, and the pressing reliability of the pressing strip is ensured.

As shown in fig. 2 and fig. 10, the main power board 4 is a square structure with four concave corners matched with the limit blocks 6 for installing the limit structures, specifically, the main power board 4 is matched with the limit blocks 18, so that the main power board 4 is fixedly clamped between the limit blocks 18.

As shown in fig. 2 and 10, the pressing bar 6 is a strip-shaped groove structure, a through hole corresponding to the upper surface of the MOS transistor 3 is formed at the bottom of the groove of the pressing bar 6, through holes for fixed connection are formed at the two ends of the pressing bar 6 and at the positions corresponding to the gaps of the MOS transistor groups, specifically, a through hole corresponding to the upper surface of the MOS transistor 3 is formed at the bottom of the groove of the pressing bar 6, the through hole is square, the two ends of the pressing bar 6 are fixedly connected with the limiting groove 17, a through hole for fixed connection with the heat dissipation base plate is further formed at the positions corresponding to the gaps of the pressing bar groove and the MOS transistor groups, and the pressing bar 6 is connected with the heat dissipation base plate through the M4 fixing screw 5.

As shown in fig. 3, the main control board 7 is provided with a through hole corresponding to the conductive post 13 on the main power board 4 and a through hole for fixedly connecting with the heat dissipation bottom board of the heat sink base 1, specifically, the main control board is connected with the heat dissipation bottom board by the first M3 fixing screw 8, in addition, the main control board 7 is provided with a through hole corresponding to the conductive post 13 on the main power board 4 at a corresponding position, and the main control board 7 can be aligned and inserted on the main power board 4.

As shown in fig. 4, a fuse 10 and a breather 11 are installed on a radiator base housing 9, the breather 11 (i.e., an explosion-proof valve) is covered by an explosion-proof valve cover, a through hole corresponding to a conductive post 13 on a main power board 4 is formed in a corresponding position of the radiator base housing 9, the through hole is fixedly connected with a radiator base 1 and a through hole corresponding to a common control terminal on a main control board 7, specifically, the breather 11, i.e., an explosion-proof valve, includes a valve body and an explosion-proof valve cover, which are arranged on the upper side of the radiator base housing 9, the radiator base housing 9 and the breather 11 are integrally designed, the radiator base housing 9 and the radiator base 1 are connected through a second M3 fixing screw 12, the common control terminal adopts an integrated design of an independent radiator base housing and is directly inserted and matched with a cable female head, the assembly of the cable female head and the radiator base housing which are commonly used in the industry is avoided, and the insertion reliability of the control terminal is improved.

As shown in fig. 6, 7, and 8, the heat sink base housing 9 and the heat sink base 1 are sealed by a pouring sealant, the heat sink base housing 9 and the conductive post 13 are sealed by a pouring sealant, and the heat sink base housing 9 and the control terminal are sealed by a pouring sealant, specifically, a gap between the heat sink base main body and the heat sink base bottom plate, a gap between the conductive post and the control terminal when passing through the corresponding through hole on the heat sink base housing 9, are all sealed by a pouring sealant 19, so as to ensure the overall waterproof sealing performance of the motor controller main body.

In addition, the structure of the motor controller adopts a laminated arrangement, the bottommost layer is a radiator base 1 body, the upper layer is a main power board 4, the MOS tube 3 is reliably pressed on a radiating bottom board of the radiator base 1 by a pressing strip 6 upwards, a M4 fixing screw 5 is locked, a main control board 7 is inserted on the main power board 4 in an aligning way, an M3 fixing screw 8 is locked, a proper amount of sealant is injected into a sealing groove, a radiator base shell 9 is covered on the radiator base 1 body, the fixing screw M3 is locked, and finally, the terminal of the upper cover is sealed by the sealant.

The utility model relates to a motor controller is through opening the recess that is used for cooperating bus-bar capacitance and busbar copper bar to sink at the radiator base, the MOS pipe is pegged graft on the busbar copper bar, the layering is with MOS pipe pressure equipment on radiator base radiating bottom plate, be equipped with the heat conduction pad between MOS pipe bottom cooling surface and the radiator base radiating bottom plate, layering and radiator base radiating bottom plate fixed connection, the counterpoint cartridge of main control board is on the main power board, with radiator base fixed connection, the main control board top is provided with radiator base shell, radiator base shell lid dress is on radiator base, both fixed connections, the MOS pipe of both sides is pegged graft on the busbar copper bar, the MOS pipe of both sides belongs to same bridge arm, parallel connection, the MOS pipe parallel circuit symmetry of same bridge arm is high, flow equalizing effect is good, direct current circuit parasitic inductance is little simultaneously, can save or reduce high frequency absorption capacity or MOS stress absorption circuit, reduce motor controller's volume; the MOS tube is inserted on the bus copper bar, the heat dissipation surface of the MOS tube is pressed on the heat dissipation bottom plate of the radiator base by using the pressing bar, the pressing bar is fixedly connected with the heat dissipation bottom plate of the radiator base, the pressing bar is limited by the installation limiting structure, deformation and swing cannot occur, and the uniform stress and heat dissipation of the MOS tube are ensured; bus capacitor and the sunken formula design of busbar, radiator base are opened and are used for cooperating the sunken recess of bus capacitor and busbar, can effectively reduce machine controller's height, and bus capacitor sinks to the radiator base recess in, has improved bus capacitor's the heat dissipation condition by a wide margin.

Claims

1. The utility model provides a motor controller, a serial communication port, including radiator base (1), radiator base (1) top is provided with main power board (4), main power board (4) openly are provided with and lead electrical pillar (13), bus capacitor (14) and busbar copper (15) are fixed in main power board (4) dorsal part, radiator base (1) is opened has and is used for cooperating busbar capacitor (14) and the sunken recess of busbar copper (15), MOS pipe (3) are pegged graft on busbar copper (15), MOS pipe (3) pass through layering (6) pressure equipment on radiator base (1) radiating bottom plate, be equipped with between MOS pipe (3) bottom radiating surface and radiator base (1) radiating bottom plate heat conduction pad (2), layering (6) and radiator base (1) radiating bottom plate fixed connection, main control board (7) counterpoint cartridge is on main power board (4), main control board (7) and radiator base (1) fixed connection, main control board (7) top is provided with radiator base shell (9), radiator shell (9) and radiator base (1) fixed connection.

2. The motor controller according to claim 1, wherein the heat sink base (1) comprises a heat dissipation bottom plate and a heat sink base body, and a sealing groove is formed between the heat dissipation bottom plate of the heat sink base (1) and the heat sink base body.

3. The motor controller according to claim 1, wherein the edge of the heat sink base (1) is provided with a hole for fixedly connecting with the heat sink base shell (9), and the heat sink base (1) is provided with an installation limiting structure on a heat sink bottom plate.

4. The motor controller according to claim 3, wherein the mounting and limiting structure comprises a limiting block (16), a limiting groove (17) and a stroke limiting column (18), the limiting block (16) is arranged on the limiting groove (17), two ends of the pressing strip (6) are fixedly connected with the limiting groove (17), the stroke limiting column (18) is arranged on the heat radiator base (1), and the stroke limiting column (18) is positioned outside the pressing strip (6).

5. A motor controller according to claim 1, characterised in that the main power board (4) is a square structure with four concave corners for matching with the limit blocks (16) for installing limit structures.

6. The motor controller according to claim 1, wherein the pressing bar (6) is a strip groove-shaped structure, the bottom of the groove of the pressing bar (6) is provided with through holes corresponding to the upper surfaces of the MOS tubes (3), and through holes for fixed connection are arranged at the two ends of the pressing bar (6) and the positions corresponding to the gaps of the MOS tube groups.

7. The motor controller according to claim 1, wherein the main control board (7) is provided with control terminals, and is provided with through holes corresponding to the conductive posts (13) on the main power board (4) and through holes for fixedly connecting with the heat dissipation bottom plate of the heat sink base (1).

8. A machine controller according to claim 1, characterised in that the radiator base housing (9) is provided, at corresponding positions, with through holes corresponding to the conductive posts (13) on the main power board (4), with through holes for fixed connection to the radiator base (1) and with through holes corresponding to the common control terminals on the main control board (7).

9. A motor controller according to claim 1, characterised in that the radiator base housing (9) is provided with a fuse (10) and a breather (11), and the breather (11) is covered with an explosion-proof valve cover.

10. The motor controller according to claim 1, wherein the heat sink base housing (9) and the heat sink base (1) are sealed by a casting glue, the heat sink base housing (9) and the conductive pillar (13) are sealed by a casting glue, and the heat sink base housing (9) and the control terminal are sealed by a casting glue.