Segmented phase-shifting outer rotor permanent magnet synchronous motor

Abstract

The invention provides a segmented phase-shifting outer rotor permanent magnet synchronous motor which relates to a permanent magnet synchronous motor and comprises a stator component and a rotor component. According to the outer rotor permanent magnet synchronous motor, a claw pole component is utilized for generating a stator rotating magnetic field; a squirrel cage guide strip cuts magnetic induction lines of a rotating magnetic field for generating an asynchronous starting torque, thereby driving the rotor component to rotate in a synchronous rotating speed in a traction manner. According to the rotor component, permanent magnets of which the number is one half of number of magnetic poles of the motor, rotor auxiliary magnetic poles which are formed through magnetizing adjacent rotor salient poles by the permanent magnets and a stator rotating magnetic field react with one another, thereby generating a synchronous torque. Two stator windings are centralized windings, thereby realizing high machining automation degree and low artificial cost. The outer rotor permanent magnet synchronous motor can be started in an asynchronous manner and has advantages of small number of the permanent magnets, high motor efficiency and low cost. Furthermore the segmented phase-shifting outer rotor permanent magnet synchronous motor satisfies a requirement for an energy-saving motor in an axial flow fan market.

Description

technical field [0001] The invention relates to a segmented phase shifting outer rotor permanent magnet synchronous motor, which relates to a permanent magnet synchronous motor, in particular to an outer rotor permanent magnet synchronous motor adopting a segmented phase shifting start. Background technique [0002] The stator part of the outer rotor motor is installed on the fixed shaft, and the rotor part is installed radially outside the stator part. External rotor motors are mainly used in axial flow fans. Most of the miniature axial flow fans represented by CPU fans use permanent magnet brushless DC motors (BLDC). Both permanent magnet brushless DC motors (BLDC) and permanent magnet synchronous motors (PMSM) have the advantages of high power factor and high motor efficiency. The disadvantage is that the cost is higher. Due to the high cost of high-power electronic drive modules and NdFeB permanent magnet materials, most high-power axial fans except miniature axial fan...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of low power factor and low motor efficiency of AC asynchronous motors, and provide an outer rotor permanent magnet synchronous motor with high motor efficiency, low cost, and adopting segmental phase-shift starting

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