CN216700617U

CN216700617U - Motor controller

Info

Publication number: CN216700617U
Application number: CN202123297696.3U
Authority: CN
Inventors: 马程龙; 吴秋桐; 于昂; 戴平华
Original assignee: Invt Electric Vehicle Drive Technology Shenzhen Co ltd
Current assignee: Invt Electric Vehicle Drive Technology Shenzhen Co ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-06-07
Anticipated expiration: 2031-12-24

Abstract

The embodiment of the utility model provides a motor controller, and relates to the technical field of controllers. Wherein the motor controller includes: the box body is provided with a first accommodating groove, a second accommodating groove and a third accommodating groove which are arranged in a separated mode; a drive plate, a capacitor module and a single tube power module are arranged in the first accommodating groove; the bottom of the first accommodating groove is provided with a radiator, the single-tube power module comprises at least one row of single-tube IGBTs arranged on the radiator, the capacitor module is arranged on one side of the single-tube power module, and the driving board is arranged above the capacitor module and the single-tube power module and is electrically connected with the capacitor module and the single-tube power module. The single-tube IGBT is adopted to replace the traditional power module, so that the problem of high cost of a motor controller caused by the selection of a packaged power module is avoided, and the volume required by the power module is reduced; the first containing groove, the second containing groove and the third containing groove are arranged in the box body in a separating mode to contain different parts, so that the electromagnetic compatibility of the motor controller is improved.

Description

Motor controller

Technical Field

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

Background

With the continuous development of electric vehicles, the requirements on the cost and the volume of a motor controller are higher and higher, and a single-tube controller is gradually adopted by most manufacturers. Traditional machine controller uses because choose the good power module of a whole integrated package for use, and this kind of power module range of application is wider, the output is comparatively stable but the price is expensive, and encapsulates bulky, adopts encapsulation module cost itself also high, can't satisfy the requirement of whole car factory to machine controller cost.

SUMMERY OF THE UTILITY MODEL

The utility model provides a motor controller, and aims to solve the problems of large size and high cost of the conventional motor controller.

In a first aspect, the present invention provides a motor controller comprising: the box body is covered by the box cover, and a first accommodating groove, a second accommodating groove and a third accommodating groove which are arranged in a separated mode are formed in the box body; a drive plate, a capacitor module and a single tube power module are arranged in the first accommodating groove; the bottom of the first accommodating groove is provided with a radiator, the single tube power module comprises at least one row of single tube IGBTs, the at least one row of single tube IGBTs is arranged on the radiator, the capacitor module is arranged on one side of the single tube power module, and the driving board is arranged above the capacitor module and the single tube power module and is electrically connected with the capacitor module and the single tube power module; an input assembly is arranged in the second accommodating groove, an output assembly is arranged in the third accommodating groove, and the input assembly and the output assembly are electrically connected with the driving plate.

The further technical scheme is that an insulating substrate is arranged between each single-tube IGBT and the radiator, and a locking elastic sheet is arranged above each single-tube IGBT and fixed on the box body through a fastening piece so as to press the single-tube IGBT and the ceramic substrate on the radiator.

The further technical scheme is that each row of single-tube IGBTs is correspondingly provided with a plurality of locking elastic sheets, and each locking elastic sheet comprises a plurality of pressure feet to correspondingly press a plurality of single-tube IGBTs.

The further technical scheme is that the insulating substrate is a ceramic substrate, and heat-conducting silicone grease is uniformly coated on the upper surface and the lower surface of each ceramic substrate.

The radiator is two water channels respectively arranged along two sides of the bottom of the third accommodating groove, the two rows of single-tube IGBTs are respectively arranged on the surfaces of the two water channels, and the capacitor module is arranged between the two rows of single-tube IGBTs.

The technical scheme is that the capacitor module is a thin film capacitor, the thin film capacitor comprises a capacitor input copper bar and a capacitor output copper column, the capacitor input copper bar and the capacitor output copper column are welded with the drive plate, the input assembly is electrically connected with the capacitor input copper bar, and the capacitor output copper column is electrically connected with the output assembly.

The input assembly comprises an input copper bar, a front filter plate, a rear filter plate, an input magnetic ring and a switching copper bar, wherein the front filter plate is arranged above the input magnetic ring and electrically connected with the input copper bar, and the rear filter plate is arranged below the input magnetic ring and electrically connected with the switching copper bar.

The output assembly comprises an output magnetic ring and an output copper bar, and the output copper bar is electrically connected with the capacitor output copper column and the output magnetic ring respectively.

The technical scheme is that a supporting plate and a control plate are arranged in the box body, the supporting plate is fixed above the first accommodating groove through a fastening piece, and the control plate is arranged above the supporting plate, separated from the driving plate and electrically connected with the driving plate.

According to a further technical scheme, the box cover comprises an upper cover plate and a wiring cover plate, the upper cover plate is connected with the box body in a sealing mode through a sealing ring, wiring openings are formed in positions, corresponding to the second accommodating groove and the third accommodating groove, of the upper cover plate, and the wiring cover plate is connected to the wiring openings of the upper cover plate in a sealing mode through the sealing ring.

The embodiment of the utility model provides a motor controller, which adopts a single-tube IGBT to replace a traditional power module which is integrated and packaged completely, avoids the problem of higher cost of the motor controller caused by selecting and packaging the power module, and reduces the volume required by the power module; the first containing groove, the second containing groove and the third containing groove are arranged in the box body in a separating mode to contain different parts, so that the electromagnetic compatibility of the motor controller is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

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

fig. 2 is a schematic structural diagram of a part of a motor controller according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a part of a motor controller according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an input assembly of a motor controller according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an output assembly of a motor controller according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a part of a motor controller according to an embodiment of the present invention;

fig. 7 is a schematic view of an overall structure of a motor controller according to an embodiment of the present invention.

Reference numerals

The capacitor module comprises a box body 1, a box cover 2, an upper cover plate 21, a wiring cover plate 22, a first accommodating groove 3, a capacitor module 31, a capacitor input copper bar 311, a capacitor output copper column 312, a driving plate 32, a radiator 331, a single-tube IGBT332, an insulating substrate 333, a locking elastic sheet 334, a second accommodating groove 4, an input assembly 41, an input copper bar 411, a front filter plate 412, a rear filter plate 413, an input magnetic ring 414, a switching copper bar 415, a third accommodating groove 5, an output assembly 51, an output magnetic ring 511, an output copper bar 512, a supporting plate 6 and a control plate 7.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, wherein like reference numerals represent like elements in the drawings. It is apparent that the embodiments to be described below are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the embodiments of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the utility model. As used in the description of embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Referring to fig. 1 to 7, a motor controller according to an embodiment of the present invention is provided. The motor controller includes: the box comprises a box body 1 and a box cover 2, wherein the box cover 2 covers the box body 1, and a first accommodating groove 3, a second accommodating groove 4 and a third accommodating groove 5 which are arranged in a separated mode are formed in the box body 1; a driving plate 32, a capacitor module 31 and a single-tube power module are arranged in the first accommodating groove 3, a radiator 331 is arranged at the bottom of the first accommodating groove 3, the single-tube power module includes at least one row of single-tube IGBTs 332, the at least one row of single-tube IGBTs 332 is arranged on the radiator 331, the capacitor module 31 is arranged at one side of the single-tube power module, and the driving plate 32 is arranged above the capacitor module 31 and the single-tube power module and is electrically connected with the capacitor module 31 and the single-tube power module; specifically, in one embodiment, a plurality of single-tube IGBTs 332 are used to replace a conventional power module integrated and packaged as a whole, so that the problem of high cost of the motor controller caused by the selection of the packaged power module is avoided, and the volume required by the power module is reduced.

Further, an input assembly 41 is disposed in the second receiving groove 4, an output assembly 51 is disposed in the third receiving groove 5, and both the input assembly 41 and the output assembly 51 are electrically connected to the driving plate 32. Specifically, in an embodiment, the first receiving groove 3, the second receiving groove 4 and the third receiving groove 5 are separately disposed in the box body 1 to receive different components, so as to improve electromagnetic compatibility of the motor controller, and prevent electromagnetic interference between the components in the receiving grooves.

Furthermore, an insulating substrate 333 is arranged between each single-tube IGBT332 and the heat sink 331, a locking spring 334 is arranged above each single-tube IGBT, and the locking spring 334 is fixed on the case 1 through a fastener so as to press the single-tube IGBT332 and the insulating substrate 333 against the heat sink 331. Specifically, in an embodiment, one end of the locking elastic sheet 334 is fixed to the case 1 of the motor controller, and the pressure generated by fixing the locking elastic sheet 334 presses the plurality of single-tube IGBTs 332 and the plurality of insulating substrates 333 against the heat sink 331, so that on one hand, the single-tube IGBTs 332 are in good contact with the heat sink 331 through the insulating substrates 333, and the heat dissipation effect is ensured; on the other hand, the firmness of fixing the single-tube IGBT332 is ensured, and the vibration resistance of the motor controller is improved.

Further, each row of single-tube IGBTs 332 is correspondingly provided with a plurality of locking elastic pieces 334, and each locking elastic piece 334 comprises a plurality of pressing feet to correspondingly press the plurality of single-tube IGBTs 332. Specifically, in one embodiment, one end of the locking spring 334 is fixed to the case 1 by a screw, and the end provided with the pressing foot is buckled downwards on the single-tube IGBT332 to press the single-tube IGBT332 and the plurality of insulating substrates 333 against the heat sink 331.

Further, the insulating substrates 333 are ceramic substrates, and heat conductive silicone grease is uniformly applied to the upper and lower surfaces of each of the ceramic substrates. Specifically, in one embodiment, the heat conductive silicone grease is a high heat conductive insulating silicone material, which is almost never cured, and can maintain a grease state in use for a long period of time at a temperature of-50 ℃ to +230 ℃. The insulating material has excellent electrical insulating property and excellent thermal conductivity. Therefore, the insulation and heat dissipation effects of the single-tube IGBT332 and the box body 1 are improved by coating the heat-conducting silicone grease on the upper surface and the lower surface of the ceramic substrate.

Further, the radiator 331 is two water channels respectively disposed along two sides of the bottom of the third accommodating groove 5, the two rows of the single-tube IGBTs 332 are respectively disposed on the surfaces of the two water channels, and the capacitor module 31 is disposed between the two rows of the single-tube IGBTs 332. Specifically, in one embodiment, the water flows through the water channels to carry away the heat generated by the two rows of single-tube IGBTs 332 and the capacitor module 31 during operation.

Further, the capacitor module 31 is a thin film capacitor, the thin film capacitor includes a capacitor input copper bar 311 and a capacitor output copper column 312, the capacitor input copper bar 311 and the capacitor output copper column 312 are both welded to the driving board 32, the input component 41 is electrically connected to the capacitor input copper bar 311, and the capacitor output copper column 312 is electrically connected to the output component 51. Specifically, in one embodiment, the capacitor input copper bar 311 is used as an input interface of the driving board 32, and the capacitor output copper pillar 312 is used as an output interface of the driving board 32.

Further, the input assembly 41 includes an input copper bar 411, a front filter plate 412, a rear filter plate 413, an input magnetic ring 414, and a switching copper bar 415, the front filter plate 412 is disposed above the input magnetic ring 414 and electrically connected to the input copper bar 411, and the rear filter plate 413 is disposed below the input magnetic ring 414 and electrically connected to the switching copper bar 415. Specifically, in an embodiment, the input current flows through the input copper bar 411, the front filter plate 412, the input magnetic ring 414, and the rear filter plate 413, and then flows through the adapting copper bar 415 to supply power to the driving board 32, so that the input current is filtered twice through the front filter plate 412 and the rear filter plate 413, thereby enhancing the filtering performance of the input assembly 41 and meeting the EMC (electromagnetic compatibility) requirement of the motor controller. And the space required by the input assembly 41 is reduced by arranging the front filter plate 412, the rear filter plate 413 and the input magnetic ring 414 in a laminated manner, so that the whole volume of the motor controller is reduced.

Further, the output assembly 51 includes an output magnetic ring 511 and an output copper bar 512, and the output copper bar 512 is electrically connected to the capacitor output copper pillar 312 and the output magnetic ring 511, respectively. Specifically, in one embodiment, the output current is output through the output magnetic ring 511 to suppress high frequency noise in the output current, where the output magnetic ring 511 plays a role of anti-interference.

Further, a supporting plate 6 and a control plate 7 are arranged in the box body 1, the supporting plate 6 is fixed above the first accommodating groove 3 through a fastener, and the control plate 7 is arranged above the supporting plate 6, separated from the driving plate 32 and electrically connected with the driving plate 32. Specifically, in an embodiment, the supporting plate 6 is fixed to the box body 1 by screws, so as to protect the components disposed in the first accommodating groove 3. The driving plate 32 is a strong current part and the control plate 7 is a weak current part, so that the driving plate 32 is separated from the control plate 7, the driving plate 32 is prevented from influencing the control plate 7, and the stability of the motor controller is improved.

Further, the case cover 2 includes an upper cover plate 21 and a wiring cover plate 22, the upper cover 21 is connected with the case body 1 in a sealing manner through a sealing ring, a wiring opening is formed in a position of the upper cover plate 21 corresponding to the second accommodating groove 4 and the third accommodating groove 5, and the wiring cover plate 22 is connected with the wiring opening of the upper cover plate 21 in a sealing manner through a sealing ring. Specifically, in one embodiment, the wiring cover plate 22 is disposed on the upper cover plate 21, so that wiring is convenient for users to use; and the upper cover and the box body 21 and the wiring openings of the wiring cover plate 22 and the upper cover plate 21 are hermetically connected through sealing rings so as to prevent an ash layer from entering the box body 1 to influence the working performance of each component.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, while the utility model has been described with respect to the above-described embodiments, it will be understood that the utility model is not limited thereto but may be embodied with various modifications and changes.

While the utility model has been described with reference to specific embodiments, the scope of the utility model is not limited thereto, and various equivalent modifications and substitutions may be easily made by those skilled in the art within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A motor controller, comprising:

the box body is covered by the box cover, and a first accommodating groove, a second accommodating groove and a third accommodating groove which are arranged in a separated mode are formed in the box body;

a drive plate, a capacitor module and a single tube power module are arranged in the first accommodating groove;

the bottom of the first accommodating groove is provided with a radiator, the single tube power module comprises at least one row of single tube IGBTs, the at least one row of single tube IGBTs is arranged on the radiator, the capacitor module is arranged on one side of the single tube power module, and the drive board is arranged above the capacitor module and the single tube power module and is electrically connected with the capacitor module and the single tube power module;

an input assembly is arranged in the second accommodating groove, an output assembly is arranged in the third accommodating groove, and the input assembly and the output assembly are electrically connected with the driving plate.

2. The motor controller according to claim 1, wherein an insulating substrate is disposed between each of the single-tube IGBTs and the heat sink, and a locking spring is disposed above the single-tube IGBTs and fixed to the case by a fastener to press the single-tube IGBTs and the insulating substrate against the heat sink.

3. The motor controller according to claim 2, wherein each row of the single-tube IGBTs is provided with a plurality of locking spring pieces, and each locking spring piece comprises a plurality of pressure feet to press the plurality of single-tube IGBTs correspondingly.

4. The motor controller according to claim 2, wherein the insulating substrates are ceramic substrates, and upper and lower surfaces of each of the ceramic substrates are uniformly coated with heat conductive silicone grease.

5. The motor controller according to claim 2, wherein said heat sink is two water channels respectively formed along two sides of a bottom of said third receiving groove, two rows of said single-tube IGBTs are respectively formed on surfaces of said two water channels, and said capacitor module is disposed between said two rows of said single-tube IGBTs.

6. The motor controller of claim 5 wherein said capacitor module is a thin film capacitor, said thin film capacitor comprising a capacitor input copper bar and a capacitor output copper post, said capacitor input copper bar and said capacitor output copper post both being soldered to said drive board, said input assembly being electrically connected to said capacitor input copper bar, said capacitor output copper post being electrically connected to said output assembly.

7. The motor controller of claim 6 wherein said input assembly comprises an input copper bar, a front filter plate, a rear filter plate, an input magnetic ring, and a switching copper bar, said front filter plate being disposed above said input magnetic ring and electrically connected to said input copper bar, said rear filter plate being disposed below said input magnetic ring and electrically connected to said switching copper bar.

8. The motor controller of claim 7 wherein said output assembly comprises an output magnetic ring and an output copper bar, said output copper bar being electrically connected to said capacitive output copper stud and said output magnetic ring, respectively.

9. The motor controller according to claim 1, wherein a support plate fixed above the first container by a fastener and a control plate disposed above the support plate and separated from and electrically connected to the drive plate are provided in the case.

10. The motor controller according to claim 1, wherein the case cover includes an upper cover plate and a wiring cover plate, the upper cover plate is connected to the case body through a seal ring, the upper cover plate is provided with wiring openings at positions corresponding to the second receiving groove and the third receiving groove, and the wiring cover plate is connected to the wiring openings of the upper cover plate through a seal ring.