Mixed concentric single and two-layer winding for servo permanent magnet synchronous motor

Abstract

The invention relates to a mixed concentric single and two-layer winding for a servo permanent magnet synchronous motor. A motor stator winding is a single and two-layer winding formed by mixing two concentric windings, wherein the number of turns of the coil of each of the two concentric windings is 3, and the pitches and the numbers of turns of the two concentric windings are different. Compared with the short-pitch two-layer winding for the foreign similar motor, the formed mixed concentric single and two-layer winding has the advantages that the fundamental wave winding coefficient is improved by 2.08%, the phase belt harmonic waves are reduced by 45%, the magnetic potential sine property is better, the heating is small, the temperature rise is low, the vibration noise is small, the torque pulsation is small, the insulation between groove layers is reduced by 28.59%, the cost is reduced, the efficiency is improved, the operating quality of the motor is improved, and the machining precision is improved.

Description

technical field [0001] The invention relates to a motor winding, in particular to a hybrid concentric single-layer and double-layer winding of a servo permanent magnet synchronous motor. Background technique [0002] Among servo spindle motors, asynchronous squirrel cage motors were mainly used in the past. When used as a spindle motor, it has small torque at low speed and low frequency and serious heat generation. In order to overcome this key defect, research and development of servo permanent magnet synchronous motors is a direction, but In order to reduce the cogging effect of permanent magnet motors, most of them are designed as fractional slot motors. The fractional slot windings are traditionally designed as short-pitch double-layer windings. Some odd harmonics in the phase-band magnetic potential harmonics are still relatively large. The torque ripple is large during operation, which affects the operation quality and workpiece processing accuracy. How to improve the ...

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Problems solved by technology

[0002] Among servo spindle motors, asynchronous squirrel cage motors were mainly used in the past. When used as a spindle motor, it has small torque at low speed and low frequency and serious heat generation. In order to overcome this key defect, research and development of servo permanent magnet synchronous motors is a direction, but In order to reduce the cogging effect of permanent magnet motors, most of them are designed as fractional slot motors. The fractional slot windings are traditionally designed as short-pitch double-layer windings. Some odd harmonics in the phase-band magnetic potential harmonics are still relatively large. The torque ripple is large during operation, which affects the operation quality and workpiece processing accuracy. How to improve the traditional short-pitch double-layer winding so that all the odd harmonics in the phase-band magnetic potential harmonics are greatly weakened. Research The new fractional slot winding further improves the running quality of the servo permanent magnet synchronous motor, which is of great practical application significance

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