CN205265381U

CN205265381U - DC brushless motor

Info

Publication number: CN205265381U
Application number: CN201521089993.0U
Authority: CN
Inventors: 李玉芳
Original assignee: Foshan Shunde E-Motor Machinery Co Ltd
Current assignee: Guangdong Laini Enterprise Management Co.,Ltd.
Priority date: 2015-12-24
Filing date: 2015-12-24
Publication date: 2016-05-25
Anticipated expiration: 2025-12-24

Abstract

The utility model discloses a DC brushless motor, including casing, end cover, stator core and rotor, stator core locate in the casing and close through the end cover lid, be equipped with the mounting panel between stator core and the end cover, stator core include yoke portion and a plurality of from outside tooth portion of extending of yoke portion, the terminal both sides of tooth portion form the end terminal that extend at both ends about along, the end of each tooth portion encloses to close and forms the cavity that holds the rotor, the rotor in be equipped with the output shaft, output shaft one end is exposed in the end cover outer end, the last lower extreme of rotor be equipped with the bearing respectively, the bearing housing on the output shaft, the rotor including being fixed in the epaxial rotor core of output and installing in the permanent magnet in the rotor core outside, each tooth portion on around there being a stator winding, magnet relative with stator winding, the stator winding connecting cable, cable one end is exposed in the casing outsidely, simple structure, small, the assembly is easy.

Description

DC brushless motor

Technical field

The utility model relates to technical field of motors, is specifically related to a kind of brushless fan.

Background technology

The stator winding of motor is made three-phase symmetrical star connection more, quite similar with threephase asynchronous. On the rotor of motor, be stained with the permanent magnet having magnetized, in order to detect the polarity of motor rotor, at the in-built position sensor of motor. Driver is made up of power electronic device and integrated circuit etc., and its function is: accept motor startup, stop, brake signal, with control motor startup, stop and braking; Accept position sensor signal and rotating signal, be used for controlling the break-make of the each power tube of inverter bridge, produce continuous torque; Accept speed command and feedback speed signal, be used for controlling and adjustment rotating speed; Protection is provided and shows etc.

In the last thirty years for the research of asynchronous motor frequency-changing speed-regulating, be the method for controlling induction motors torque finding, rare earth permanent magnetic brushless dc motor will manifest advantage in speed governing field with features such as its wide range speed control, small size, high efficiency and steady-state speed error are little after all.

Brshless DC motor, because have the characteristic of brush direct current motor, is also the device of change of frequency simultaneously, so have another name called DC frequency-changing, international noun is BLDC. The running efficiency of brshless DC motor, low speed torque, rotary speed precision etc. are all also good than the frequency converter of any control technology, so be worth industry to be paid close attention to.

Utility model content

The purpose of this utility model is to provide a kind of direct current brushless motor, simple in structure, and volume is little, and assembling easily.

The utility model solves the technical scheme that its technical problem adopts: a kind of DC brushless motor, it is characterized in that: comprise housing, end cap, stator core, bearing block and rotating shaft, described stator core is located in housing and is covered by end cap, between stator core and end cap, be provided with installing plate, described stator core comprises yoke portion and several are from outward extending tooth portion of yoke portion, the end both sides of tooth portion form the pole shoe extending along two ends, left and right, described end cap middle part extension forms protruding cover, the end of described each tooth portion encloses and forms the cavity that holds protruding cover, described bearing block is fixed by screws in housing inner bottom part, one end of rotating shaft is fixed on bearing block, the other end is exposed to end cap outer end, the upper and lower side of rotating shaft is respectively equipped with bearing, described bearing block, rotating shaft and bearing are located in the protruding cover of end cap, the outside of described stator core is installed and is provided with some permanent magnets, in described each tooth portion, be wound with stator winding, and magnet is relative with stator winding, described stator winding stube cable, cable one end is exposed to hull outside.

As preferably, described yoke portion extends internally and is provided with 12 tooth portions, between the pole shoe that the end of each tooth portion extends, leaves gap.

The beneficial effects of the utility model are: simple in structure, volume is little, and assembling easily.

Brief description of the drawings

Fig. 1 is the STRUCTURE DECOMPOSITION figure of direct current brushless motor.

Fig. 2 is the structural representation of stator core.

Detailed description of the invention

Clearer for technical problem, technical scheme and beneficial effect that the utility model is solved, below in conjunction with accompanying drawing and embodiment, the utility model is further described. Should be appreciated that embodiment described herein is only for explaining the utility model, and be not used in restriction the utility model.

As shown in Figure 1-2, a kind of DC brushless motor of the utility model, comprise housing 1, end cap 2, stator core 3, bearing block 4 and rotating shaft 5, stator core 3 is located in housing 1 and is covered by end cap 2, between stator core 3 and end cap 2, be provided with installing plate 6, stator core 3 comprises yoke portion 31 and several are from outward extending tooth portion of yoke portion 31 32, the end both sides of tooth portion 32 form the pole shoe 33 extending along two ends, left and right, end cap 2 middle part extensions form protruding cover 21, the end of each tooth portion 32 encloses and forms the cavity that holds protruding cover 21, bearing block 4 is fixed by screws in housing 1 inner bottom part, one end of rotating shaft 5 is fixed on bearing block 4, the other end is exposed to end cap 2 outer ends, the upper and lower side of rotating shaft 5 is respectively equipped with bearing 7, bearing block 7, rotating shaft 5 and bearing 7 are located in the protruding cover 21 of end cap 2, the outside of stator core 3 is installed and is provided with some permanent magnets 8, in each tooth portion 32, be wound with stator winding 9, and magnet 8 is relative with stator winding 9, stator winding 9 stube cables 10, cable 10 one end are exposed to housing 1 outside.

As preferred embodiment, described yoke portion 31 extends internally and is provided with 12 tooth portions 32, between the pole shoe 33 that the end of each tooth portion 32 extends, leaves gap.

The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all any amendments of doing within spirit of the present utility model and principle, replace and improvement etc. on an equal basis, within all should dropping on protection domain of the present utility model.

Claims

1. a DC brushless motor, it is characterized in that: comprise housing, end cap, stator core, bearing block and rotating shaft, described stator core is located in housing and is covered by end cap, between stator core and end cap, be provided with installing plate, described stator core comprises yoke portion and several are from outward extending tooth portion of yoke portion, the end both sides of tooth portion form the pole shoe extending along two ends, left and right, described end cap middle part extension forms protruding cover, the end of described each tooth portion encloses and forms the cavity that holds protruding cover, described bearing block is fixed by screws in housing inner bottom part, one end of rotating shaft is fixed on bearing block, the other end is exposed to end cap outer end, the upper and lower side of rotating shaft is respectively equipped with bearing, described bearing block, rotating shaft and bearing are located in the protruding cover of end cap, the outside of described stator core is installed and is provided with some permanent magnets, in described each tooth portion, be wound with stator winding, and magnet is relative with stator winding, described stator winding stube cable, cable one end is exposed to hull outside.

2. DC brushless motor according to claim 1, is characterized in that: described yoke portion extends internally and is provided with 12 tooth portions, between the pole shoe that the end of each tooth portion extends, leaves gap.