Coreless permanent magnet synchronous linear motor with double-layer reversely tilting windings

Abstract

The invention discloses a coreless permanent magnet synchronous linear motor with double-layer reversely tilting windings. Mover coils in the permanent magnet synchronous linear motor are set as double-layer coil windings: upper-layer coil windings and alower-layer coil windings. The upper-layer coil windings and the lower-layer coil windings are set in planes where the upper-layer coil windings and lower-layer coil windings are in a tilting mode. Each pair of windings at upper and lower corresponding positions in the upper-layer coil windings and the lower-layer coil windings symmetrically tilt towards opposite directions by taking a center line as a symmetric center, thereby forming a double-layer reversely tilting winding form. According to the coreless permanent magnet synchronous linear motor with the double-layer reversely tilting winding, thrust ripples of the motor are clearly reduced, thrust density of the motor is improved, motor operation is relatively stable, motor processing precision is improved, and the motor is widely applied to precision machining.

Description

technical field [0001] The invention relates to a topological structure of an iron-core permanent magnet synchronous linear motor, more specifically an iron-less permanent magnet synchronous linear motor capable of suppressing thrust fluctuations of the permanent magnet synchronous linear motor. Background technique [0002] Permanent magnet synchronous linear motor (PMSLM) has the advantages of fast response, high acceleration, high thrust density and high positioning accuracy, and has broad application prospects in precision CNC machine tools with less cutting force. However, the presence of thrust fluctuations of the permanent magnet synchronous linear motor makes the motor generate vibration and noise during the feeding process, which affects the stability of the motor's operation and further affects the processing quality of the motor. [0003] Aiming at the problem of linear motor thrust fluctuation suppression, domestic and foreign researchers have done a lot of work,...

AI Technical Summary

Problems solved by technology

However, the optimal combination method of chute, inclined pole, and pole arc coefficient mainly weakens the thrust fluctuation caused by the cogging effect, and does not improve the waveform of the motor air-gap magnetic flux density; the Halbach array has high requirements for the motor assembly process; The special-shaped permanent magnet makes the air thickness of the motor uneven, and its processing cost is high; the V-shaped coil weakens the amplitude of the air gap magnetic flux density and reduces the thrust density of the motor

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