Permanent magnetism servo synchronous motor three-phase winding

Abstract

The invention provides a permanent magnetism servo synchronous motor three-phase winding, wherein a motor stator core has 36 slots, pole number is 8, phase number is 3, and a stator core adopts a skewed slot. A three-phase single layer winding is arranged in the 36 slots of a stator: an a phase winding ax is composed of 6 coils, a is led out from a second slot, and x is led out from a 34th slot; a b phase winding by is composed of 6 coils, b is led out from a fifth slot, and y is led out from a 36th slot; a c phase winding cz is composed of 6 coils, c is led out from a eighth slot, and z is led out from a third slot. According to the three-phase single layer winding, an average pitch is 4, number of turns of each coil is equal, and the windings in each slot all are single layers. Coil leading-out wire adopts a Y connection method, i.e., x, y and z of the three windings are connected together without leading out and are led out by a, b and c. The three phases of the three-phase single layer winding differ by 120 degrees mutually to form the symmetrical three-phase winding. The three-phase winding is suitable for permanent magnetism servo synchronous motor stator winding structure.

Description

[0001] [0002] technical field [0003] The invention relates to a three-phase winding of a permanent magnet servo synchronous motor, belonging to the technical field of motor windings. [0004] Background technique [0005] An existing permanent magnet servo synchronous motor, the number of stator core slots is 36, the number of poles is 8 poles, the number of phases is 3 phases, and the number of slots per pole and phase is q=3 / 2, which is fractional slots, and the stator core No chute, according to the conventional design of fractional slots, it is a short-pitch double-stack winding with a pitch of 4. This winding has the following disadvantages: (1) The motor is small, the number of poles is large, the number of slots is 36 slots, and the slot shape is small. In the lower double-layer winding, the slot utilization rate is low, the slot full rate is high, the coil embedding is difficult, and the coil is easy to be damaged; (2) The phase potential waveform of t...

AI Technical Summary

Problems solved by technology

[0003] An existing permanent magnet servo synchronous motor, the number of stator core slots is 36, the number of poles is 8 poles, the number of phases is 3 phases, each pole and each phase The number of slots is q=3 / 2, which is a fractional slot. The stator core does not have inclined slots. It is designed according to the conventional fractional slot. It is a short-distance double-stack winding with a pitch of 4. This winding has the following disadvantages: (1) The motor is small , the number of poles is large, the number of slots is 36 slots, the slot shape is small, and the double-layer winding is placed under it, the slot utilization rate is low, the slot full rate is high, it is difficult to insert coils, and the coils are easy to be damaged; (2) The phase of the three-phase winding The potential waveform is very poor, the calculated phase potential waveform harmonic content is as high as 21.03%, and the line potential waveform harmonic content is as high as 3.35%; the temperature of the motor rises, the vibration and noise are large, the running quality is poor, and the low-speed torque is small, which seriously affects the low-speed motor. run

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