Single-phase induction motor and method for reducing noise in the same

摘要

A single-phase induction motor and a method for reducing noise in the same, which can eliminate unbalance between magnetomotive forces of main (1) and auxiliary (2) windings in a stator of the motor, thereby implementing a low noise, low vibration motor, and can also achieve balance between the magnetomotive forces of the stator windings in the entire running range of the motor, and can further achieve balance between the magnetomotive forces of the stator windings on the basis of temperature increase of the motor as it runs. The amplitude of a main-winding current (Im) flowing through the main winding in the stator is controlled to be equal to the amplitude of an auxiliary-winding current (Ia) flowing through the auxiliary winding in the stator, and the phase difference between the main-winding and auxiliary-winding currents is controlled to be maintained at a predetermined value.