A kind of sine wave permanent magnet synchronous motor with low cogging effect and its manufacturing method

Abstract

The invention provides a sine wave permanent magnet synchronous motor with low cogging effect and its manufacturing method, wherein the motor includes a semi-closed slot punched stator and a surface-mounted rare earth permanent magnet material excitation rotor, and the semi-closed slot is punched There are 36 stator slots in the stator; the surface-mounted rare earth magnetic material excitation rotor includes steel sleeves, magnetic steel and rotor punching pieces; eight magnetic steels are installed between two positioning teeth, and the steel sleeves are set on eight magnets steel perimeter. The manufacturing method includes the following steps: calculating the number of slots corresponding to each pole and each phase, distributing the magnetic pole angle range occupied by the magnetic poles on the circumference of the rotor, setting positioning teeth with corresponding arc spacing, fixing the magnetic steel between the positioning teeth, A steel sleeve is placed on the outer periphery of the steel, and the rotor is rotatably installed in the stator. The motor and its manufacturing method reasonably distribute the magnetic poles on the rotor circumference, so that the cogging reluctance of the rotor at any angle within the 360° mechanical angle of the stator circumference is equal, and the stability and control accuracy of the motor torque are improved.

Description

Technical field [0001] The invention provides a sine wave permanent magnet synchronous motor and a manufacturing method thereof, in particular a sine wave permanent magnet synchronous motor with low cogging effect and a manufacturing method thereof. Background technique [0002] The cogging effect of rare earth permanent magnet synchronous motors is an undesirable effect that has always existed since the advent of permanent magnet synchronous motors, and it is a thorny problem that electrical engineers have to find a way to solve. Looking at permanent magnet motors at home and abroad, engineers have thought of many methods, such as: stator punching using closed slots; open slot magnetic slot wedges; stator skewed slots; rotor slanted poles; Siemens motors use spaced magnetic short circuit design ideas and other methods. Judging from the suppression results, the Siemens motor has the best effect. No other methods can effectively weaken the adverse effects of cogging. However, th...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing sine wave permanent magnet synchronous motor has poor cogging suppression effect, which affects the output efficiency of the sine wave permanent magnet synchronous motor

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