CONTROLLER FOR A DIRECT CURRENT BRUSHLESS MOTOR

Abstract

Taught herein is a controller for a DC brushless motor comprising a control board (3) and a housing (4); wherein the control board (3) is disposed in the housing (4), and the housing (4) is made of metal materials with good thermal conductivity; a plurality of heat sinks (5) are disposed at the bottom of the housing (4), thereby heat generated by the control board (3) will be dissipated fast, and the operating temperature and failure rates are reduced; an integrated power module chip (7) disposed at the bottom of the control board (3) transfers heat to the housing (4) via an insulating heat sink (8), and in doing so prevents electric leakage; the purpose of a plurality of gaps (9) disposed at the top of the housing (4) is to provide ventilation, and to dissipate heat fast; all of these design characteristics make the invention simple in structure, and convenient for mass assembly.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The objects and advantages of the invention will become more readily apparent after reading the ensuing descriptions of the non-limiting illustrative embodiment and viewing the accompanying drawings, in which

FIG. 1 is an exploded view of a controller for a DC brushless motor according to one embodiment of the invention;

FIG. 2 is a cross-sectional view thereof,

FIG. 3 is a perspective view of the housing 4 viewed from a first angle;

FIG. 4 is a perspective view of the housing 4 viewed from a second angle; and

FIG. 5 is a perspective view of a controller for a DC brushless motor installed on the DC brushless motor.

DETAILED DESCRIPTION OF THE INVENTION

As shown in FIGS. 1-3, a controller for a DC brushless motor comprises a control board 3 and a housing 4. The control board 3 is disposed in the housing 4. The housing 4 is made of a metal material with good thermal conductivity, e.g., without limitation, an aluminum alloy material.

A plurality of cooling fins 5, parallel to one another, are disposed at the bottom of the housing 4, and a plurality thereof extend to a side wall the housing 4 so as to maximize the heat dissipation area.

A jut 6 protrudes from an inner bottom wall of the housing 4 so as to support the control board 3.

An integrated power module chip 7 for driving the motor is disposed at the bottom of the control board 3. An insulating heat sink 8 made of silicon rubber is disposed between the integrated power module chip 7 and the inner bottom wall of the housing 4.

A plurality of gaps 9 is disposed at the top of the housing 4, so as to receive a plurality of screw heads sticking out of a bottom wall of the motor. The function of the gaps 9 is to provide ventilation. A pair of protrusions 2 is disposed one at each of two opposite sides at the top of the housing 4.

A pair of holes 10 is disposed on the protrusions 2. The housing 4 is fixed at the bottom of the DC brushless motor 1 via a pair of screws passing through the holes 10. A through hole 11 for passing a control cable is disposed in a side wall of the housing 4.

While particular embodiments of the invention have been shown and described, it will be obvious to those skilled in the art that changes and modifications may be made without departing from the invention in its broader aspects, and therefore, the aim in the appended claims is to cover all such changes and modifications as fall within the true spirit and scope of the invention.

Claims

1. A controller for a direct current brushless motor (1), comprising a control board (3);a housing (4) having an inner side wall, an outer side wall, a top, and an inner bottom wall; anda plurality of cooling fins (5); whereinsaid control board (3) is disposed in said housing (4), said cooling fins (5) are disposed at the bottom of said housing (4), and said housing (4) is made of a heat-conducting material.

2. The controller of claim 1, wherein said cooling fins (5) are parallel to each other.

3. The controller of claim 2, wherein said cooling fins (5) extend to said outer side wall of said housing (4).

4. The controller of claim 2, wherein a plurality of juts (6) for supporting said control board (3) protrude from said inner side wall of said housing (4).

5. The controller of claim 4, wherein an integrated power module chip (7) for driving a motor is disposed at the bottom of said control board.

6. The controller of claim 5, wherein an insulating heat sink (8) is disposed between said integrated power module chip (7) and said inner bottom wall of said housing (4).

7. The controller of claim 6, wherein said heat sink (8) is made of a silicon rubber.

8. The controller of claim 4, wherein a plurality of gaps (9) is disposed at said top of said housing (4).

9. The controller of claim 8, wherein said gaps (9) are for receiving a plurality of screw heads protruding out of a wall of the direct current brushless motor (1).

10. The controller of claim 9, wherein a pair of protrusions (2) is disposed at two opposite sides of said top of said housing (4).

11. The controller of claim 10, wherein a pair of holes (10) is disposed on two opposite sides of said protrusions (2).

12. The controller of claim 11, wherein said housing (4) is connected to the bottom of the direct current brushless motor (1) via a pair of screws passing through said holes (10).

13. The controller of claim 12, wherein said housing (4) is made of aluminum alloy material.

14. A controller for a direct current brushless motor (1), comprising a control board (3) having a top portion and a bottom portion;a housing (4) having an inner side wall, an outer side wall, a top, and a bottom inner wall;a plurality of cooling fins (5);an integrated power module chip (7) for driving the motor; andan insulating heat sink (8); whereinsaid control board (3) is disposed in said housing (4), said cooling fins (5) are disposed at the bottom of said housing (4), said integrated power module chip (7) is disposed at said bottom portion of said control board, and said insulating heat sink (8) is disposed between said integrated power module chip (7) and said inner bottom wall of said housing (4).

15. The controller of claim 14, wherein said housing (4) is made of a heat-conducting material.

16. The controller of claim 14, wherein said heat sink (8) is made of silicon rubber.

17. A controller for a direct current brushless motor (1), comprising a control board (3) having a top portion and a bottom portion; a housing (4) having an inner side wall, an outer side wall, a top, and a bottom inner wall;a plurality of cooling fins (5);an integrated power module chip (7) for driving the motor;an insulating heat sink (8); anda plurality of juts (6) for supporting said control board (3); whereinsaid control board (3) is disposed in said housing (4), said cooling fins (5) are disposed at the bottom of said housing (4), said integrated power module chip (7) is disposed at said bottom portion of said control board, said insulating heat sink (8) is disposed between said integrated power module chip (7) and said inner bottom wall of said housing (4), said juts (6) protrude from said inner side wall of said housing (4), and said control board (3) rests is supported on said juts (6).