Stator structure for weakening electromagnetic exciting force of motor

Abstract

The invention discloses a stator structure for weakening electromagnetic exciting force of a motor. The stator structure comprises a stator tooth part, a stator yoke part, a magnetic conductive damping layer, a stator winding, a slot wedge, an insulating material and the like, and the tooth part and the yoke part of a stator iron core are structurally separated and are isolated by the magnetic conductive damping layer; only thin inter-tooth connecting yokes are arranged on the outer side of the stator tooth part, and the outer side of the stator tooth part is arranged in a circular or polygonal manner so as to be matched with the stator yoke part and transmit torque; the inner side of the stator yoke part is matched with the stator tooth part, and the matching surface is arranged in a circular or polygonal manner; and the magnetic conductive damping layer between the tooth part and the yoke part of the stator is assembled together through processes such as brushing, bonding, sintering or potting. Compared with a traditional motor, the stator structure has the advantages that the excitation force acting on the yoke part is weakened, higher harmonics are effectively suppressed, vibration and noise of the yoke part of the motor and the outer side of the motor base are reduced, particularly, a good suppression effect on switching frequency and derivative frequency caused by PWM power supply is achieved, and the stator structure is suitable for an alternating current motor with high requirements for vibration and noise suppression.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a stator structure for weakening the electromagnetic excitation force of a motor. Background technique [0002] In recent years, the performance of AC motors (induction motors, permanent magnet synchronous motors, etc.) has been put forward higher and higher requirements in the application fields such as industry and national defense, and the vibration and noise of motors has gradually become a hot spot for researchers. The vibration and noise of an AC motor is mainly caused by the electromagnetic exciting force acting on the surface of the stator teeth. The stator core of a conventional AC motor is an integral structure, and the stator teeth and the yoke are connected together. [0003] When the motor is working, the air gap magnetic density in the air gap generates radial and tangential electromagnetic excitation forces on the surface of the stator teeth. Due to the...

AI Technical Summary

Problems solved by technology

In particular, the high-order harmonic current caused by PWM power supply is easy to generate a large number of switching frequencies and deri

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