CN2484691Y

CN2484691Y - Salient-pole brush-less DC. motor

Info

Publication number: CN2484691Y
Application number: CN 01235891
Authority: CN
Inventors: 王江涛; 赵克峰; 王�锋; 刘继辉; 吴林
Original assignee: Midea Group Co Ltd
Current assignee: Guangdong Welling Motor Manufacturing Co Ltd
Priority date: 2001-05-15
Filing date: 2001-05-15
Publication date: 2002-04-03
Anticipated expiration: 2011-05-15

Abstract

A salient-pole brush-less Decimator compromises stator assembly, external rotor assembly, controlling driving circuit board and shell. The stator assembly is provided with salient-pole stator iron core, insulation frame (or plastic covered frame), bearing holder and stator winding. The salient-pole of the stator is T shape, and the external edge is arc, having 3-9 salient poles. Circumferential cross-section of arc shape external edge on T shape salient pole exists in the form of wing. Non-symmetric stator makes the air space of motor uneven and changes the magnetic circuit between the stator and rotor, which can be used in starting motor and reducing the noise. The utility model has the advantages of high safety and reliability for long-time operation, low noise, easy manufacturing the components, low costs. The utility model is applied to produce in batches.

Description

A kind of salient pole brushless DC motor

The utility model relates to a kind of salient pole brushless DC motor, is meant a kind of salient pole brushless DC motor with non-uniform gap especially.

Air conditioner is as a kind of household electrical appliance that progress into huge numbers of families, be mainly used in the refrigeration or heat, this room that just causes being equipped with air-conditioning must be airtight, it is dirty that long room air of time one will become, the corresponding miscellaneous functions such as ventilation, air-supply, dehumidifier that just increased of air-conditioning, drive motors require that power is little, the speed adjusting range is big, noise is low, cost is low.

The purpose of this utility model provides a kind of dc brushless motor that simple, the low vibration of low noise, cost are low, be easy to produce in batches of making.

The purpose of this utility model realizes by following measure.A kind of salient pole brushless DC motor, comprise stator module, external rotor assembly, control Driver Circuit plate, housing, stator module comprises salient pole stator core, Insulating frame or plastic framework, bearing spider, stator winding, wherein the salient pole of stator is the T type, outer rim is camber line, and 3～9 salient poles are arranged.The circumferential shape of cross section of the arc line type outer rim of T type salient pole is the wing shape, and the radius of wing outer wall dwindles gradually, the constant-radius of wing inwall.In addition, the tail end of wing shape T type salient pole upwarps.

The utility model compared with prior art because the cylindrical of salient pole stator is segmented into several sections camber lines, the camber line afterbody upwarps, and makes motor gas-gap inhomogeneous, has changed the magnetic circuit between motor stator and rotor, has improved the starting of motor and has reduced noise.Material requested is common used material, makes, matching requirements are not high.The motor cycle of operation is long, safety and reliability height, and noise is low, and the parts cost is low, is easy to produce in batches.

Accompanying drawing 1 is that the utility model assembling complete section master looks schematic diagram; Accompanying drawing 2 is the utility model assembled shaft side schematic diagrames; Accompanying drawing 3 is stator core of the present utility model, Insulating frame or plastic framework, limiting iron sheet assembled shaft side schematic diagram; Accompanying drawing 4 is axle side schematic diagrames of the utility model bearing spider; Accompanying drawing 5 is that the amplification master of the utility model stator core looks schematic diagram; Accompanying drawing 6 is the utility model limiting iron bobbin side schematic diagrames; Accompanying drawing 7 is that control Driver Circuit plate master of the present utility model looks schematic diagram.

With reference to accompanying drawing.Accompanying drawing 1 is given the structural relation of having shown after the utility model final assembly is finished signal, comprise the wind wheel 1 that is fixed on the external rotor shell 2, rotor magnetic ring 7, armature spindle 4 and support 3 thereof, bearing 11 and bearing spider 13, be wound with stator winding 8 on the stator core 10, Insulating frame or plastic framework 9 are arranged on the stator winding, be fixed on the controlling and driving wiring board 5 on the stator, stator center has distance collar 12, also has hold-down nut 6.Accompanying drawing 3～7 is given the CONSTRUCTED SPECIFICATION of having shown stator, the stator core middle part is a through hole, the iron core groove 14 that location usefulness is arranged on the hole wall, have groove 16 on Insulating frame on it or the plastic framework, Insulating frame or plastic framework upper mounting plate have the barb 15 for the control circuit board location, have corresponding groove 21 on the wiring board; Being assemblied on the spacing iron plate in the stator has hangnail 17, and the convex tendon 18 that mates with stator is arranged on bearing spider, also has barb 19 on the bearing spider; The most important thing is that the outer rim of T type salient pole stator is the arc 20 of indentation gradually.

Accompanying drawing has been shown that most preferred embodiment, the cylindrical of salient pole stator are segmented into four sections camber lines, and the camber line afterbody upwarps, and makes motor gas-gap inhomogeneous, has changed the magnetic circuit between motor stator and rotor, is beneficial to the starting of motor and reduces noise.The control Driver Circuit plate is exported induced current by position transducer, the drive motors running.The stator of motor adopts the quick-clamping structure with bearing spider: diameter of stator bore cooperates axiality when guaranteeing the stator and rotor running with the bearing spider face of cylinder, convex tendon and diameter of stator bore upper groove between the two the turnover of restriction that matches on the bearing spider, the fluting on the bearing spider on barb and Insulating frame or the plastic framework, the hangnail on the spacing iron plate guarantee axial location.Adopt the fast-assembling location structure between control Driver Circuit plate and the stator: the platform barb of perforate on the circuit board and Insulating frame or plastic framework is complementary, and external rotor and shell, axle adopt overall structure.

Claims

1, a kind of salient pole brushless DC motor, comprise stator module, external rotor assembly, control Driver Circuit plate (5), housing (2), stator module comprises salient pole stator core (10), Insulating frame or plastic framework (9), bearing spider (13), stator winding (8), the salient pole that it is characterized in that stator is the T type, outer rim is camber line, and 3～9 salient poles are arranged.

2, DC motor according to claim 1 is characterized in that the circumferential shape of cross section of the arc line type outer rim of T type salient pole is the wing shape, and the radius of wing outer wall dwindles gradually, the constant-radius of wing inwall.

3, DC motor according to claim 2 is characterized in that the tail end of wing shape T type salient pole upwarps.