Patent ID: 9614421
Date: 2017-04-04
CPC Classifications: H02K,H05K

Claim:
1. A brushless DC motor, comprising: a housing, the housing comprising two ends; a stator assembly; a rotor assembly; a front-end cover; a rear-end cover, the rear-end cover comprising a plurality of threaded holes and a water channel; a control box, the control box comprising an inner wall, a plurality of positioning holes, and an end comprising a water outlet; a circuit board; a dissipater; an IGBT module; and an insulating piece; wherein: the circuit board is disposed inside the controller box; the dissipater is disposed on the inner wall of the control box; the IGBT module is disposed on the dissipater and is in electric connection with the circuit board; the insulating piece is disposed between the dissipater and the controller and prevents the dissipater from contacting with the control box; the stator assembly is disposed inside the housing; the rotor assembly is disposed on a bearing of the front-end cover and the rear-end cover and is inserted into the stator assembly; the front-end cover and the rear-end cover are disposed on the two ends of the housing, respectively; the circuit board is arranged inside the control box; the dissipater is disposed on the inner wall of the control box; the IGBT module is disposed on the dissipater and is in electric connection with the circuit board; the positioning holes are disposed on the control box; the threaded holes are disposed on the rear-end cover; a screw bar passes through each positioning hole and is inserted into a corresponding threaded hole for fixing the control box on the rear-end cover; the insulating piece is arranged between the dissipater and the control box for preventing the dissipater from directly contacting with the control box; the water channel is arranged on the rear-end cover outside the threaded hole, the water outlet is arranged on the end of the control box, and the water channel communicates with the water outlet; a bottom surface of the control box outside the positioning hole is convex downwardly to form a first lug boss; a bottom of the water channel outside the threaded hole is convex to form a second lug boss; and the rear-end cover is provided with a wire hole, and the end surface of the rear-end cover outside the wire hole is convex to form a third lug boss.