Pole arc length-variable phase-shift starting motor stator

Abstract

The invention relates to a motor stator, in particular, a pole arc length-variable phase-shift starting motor stator. The pole arc length-variable phase-shift starting motor stator comprises a statorcore component and a stator yoke. With the motor stator adopted, the number of coils connected in series of the working winding of a single-phase asynchronous motor during the starting state of the single-phase asynchronous motor can be decreased, namely, the terminal voltage of the working winding of the motor in the starting state can be increased, the power of the motor can be increased, and the starting torque of the motor can be increased; after the motor is started, the power source of a starting winding is cut off, and the wiring mode of the working winding is changed, and therefore, the pole arc length of the magnetic poles of the stator of the working winding during the operation state of the motor is increased, and the number of coils connected in series of the working winding isincreased, that is, the terminal voltage of the working winding during the operation state is lowered, and the working current of the working winding is lowered; and therefore, the motor is small inworking current, high in efficiency and large in output torque during the operation state. The motor stator can realize pole variation and speed variation when applied to the single-phase asynchronousmotor. The motor stator employs a concentrated winding.

Description

technical field [0001] The invention relates to a stator of a pole-arc length-changing phase-shift start motor, which relates to a motor stator, in particular to a motor stator wound with concentrated windings by changing the pole arc length of the stator and the wiring mode of the stator winding to achieve shifting. Phase start and pole shifting. Background technique [0002] The motor stator winding coil is divided into two structural types: distributed winding and concentrated winding. Most asynchronous motors use distributed windings, while brushless DC motors (BLDC) and permanent magnet synchronous motors (PMSM) use centralized windings. The processing technology of distributed winding is complicated, and the processing technology of centralized winding is simple. The interphase insulation strength of centralized winding is higher than that of distributed winding. The winding end length of the concentrated winding is shorter than that of the distributed winding. Sho...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the disadvantage that common single-phase asynchronous motors cannot achieve pole-changing and speed-changing if centralized windings are used, and to provide an additional method for the generation of tooth harmonic magnetic fields that is beneficial to the winding process of centralized windings and applied to single-phase asynchronous motors. Stator of pole-changing, arc-length, phase-shifting, single-phase asynchronous motors with small torque, centralized winding and pole-changing, variable-speed, and phase-shifting start

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