Easily starting motor structure

Abstract

The invention comprises: a securing unit, a rotator and a magnet-sensing balance unit. The securing unit has a stator set having at least one winding and two magnetic pole faces respectively forming a strong magnetic area and a week magnetic area. In said rotator a ring magnet is mounted. Said magnet-sensing balance unit is located on said securing unit, and has at least two magnet-sensing surfaces opposite to said week magnetic area and facing said ring magnet of said rotator. When said rotator runs, said ring magnet senses the alternating magnetic field of said magnetic pole face, and produces a magnetic attraction corresponding to said magnet-sensing surface so as to keep the stability and balance of said rotator.

Description

technical field [0001] The present invention relates to a motor structure, in particular, a fixed part is provided with several magnetically sensitive surfaces facing at least the weak field regions of the two magnetic pole faces of a certain stator group, so as not to affect the alternating excitation efficiency of the strong magnetic regions of the stator group , to provide an appropriate amount of corresponding magnetic attraction balance effect, and then maintain the motor balance structure of the rotor's startup and rotation stability. Background technique [0002] The rotation balance structure of the known motor rotor, such as China Taiwan Announcement No. 383818 "radiator fan group structure with magnetic positioning", No. 421369 "balanced positioning of brushless DC motor and pole piece structure thereof", No. 423760 "brushless DC Motor Structure", No. 422365 "Radiator Structure with Magnetic Positioning Fan Group", No. 428838 "Motor Rotor Positioning Structure", No...

AI Technical Summary

Problems solved by technology

[0005] However, when the above-mentioned rotation balance structure is used in a motor with an easy-to-start function, there are actually still the following problems. This may cause the magnetically sensitive part and the magnetically attracted part to provide excessively balanced magnetic force

Furthermore, the magnetically sensitive part often overly covers the alternating magnetic field range of the magnetic pole surface of the stator group, especially the strong magnetic region that almost completely covers the magnetic pole surface, so it often negatively affects the alternating magnetic field of the magnetic pole surface, thereby reducing the The rotational efficiency of the rotor

On the other hand, at the moment of starting the rotor, although the strong magnetic area and the weak magnetic area are arranged on the magnetic pole surface of the stator group, it is beneficial to start the rotor to rotate easily, but the local excitation unevenness caused by the strong magnetic area and the weak magnetic area also causes the The rotor is prone to vibration and vibration problems at the moment of starting, so it is still not conducive to effectively reducing the rotation wear of the bearing or prolonging the service life of the motor. As a result, the actual balance effect of the rotation balance structure is not as expected

Images