Direct-current brushless motor structure for mobile phone

Abstract

The invention discloses a direct-current brushless motor structure for a mobile phone. The direct-current brushless motor structure comprises a rotor assembly, a stator assembly and an upper shell, wherein the rotor assembly comprises an eccentric weight, magnetic steel, an oil-retaining bearing and a yoke; the eccentric weight, the magnetic steel and the oil-retaining bearing are all arranged on the yoke; the stator assembly comprises a lower bracket, a coil, a revolving shaft and a driving chip with a Hall function; the coil, the revolving shaft and the driving chip with the Hall function are all arranged on the lower bracket; the rotor assembly is arranged on the stator assembly, and the oil-retaining bearing of the rotor assembly is matched with the revolving shaft of the stator assembly; the upper shell covers the rotor assembly and the stator assembly, and is connected with the lower bracket; and the lower bracket is provided with a plurality of through holes which are uniformly distributed. The direct-current brushless motor structure has the beneficial effects of capabilities of identifying the polarity of the magnetic steel and ensuring normal work of a motor, freeness from an electric brush, small size, less used components, simple production process, long service life, prevention of noise, and freeness from electronic interference.

Description

technical field [0001] The invention relates to the relevant technical field of DC brushless motors, in particular to a DC brushless motor structure for mobile phones. Background technique [0002] At any time, the functions of mobile phones increase, and people live less and less on mobile phones. At the same time, the requirements for mobile phones are larger and larger screens, more complete functions, and more durable batteries. Therefore, other functions in mobile phones are required Components have to get smaller and smaller to make room for screens, batteries, etc. [0003] At the same time, due to the enhanced functions of mobile phones, the requirements for signals are getting higher and higher, which leads to the increase of mobile phone antennas. However, due to the existence of mechanical commutators in traditional motors, electronic interference will be generated due to the generation of electric sparks, which will affect the function of antennas. Since the bru...

AI Technical Summary

Problems solved by technology

Under normal circumstances, the position where the rotor stays is arbitrary, that is to say, there is a possibility that the magnetic steel N / S poles alternately stop on the Hall sensor, and the Hall sensor cannot recognize the magnetic steel pole at this time. resistance, so that the motor cannot work

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