Abstract
Effects of the air-gap length GL and winding distribution on the magnetic space harmonics BN and torque losses of the capacitor motor are discussed. Relationships between equivalent circuit parameters and GL are investigated with changing GL from 0.35 to 0.15mm. The experimental values of developed torque are compared with calculated values by use of the equivalent circuit parameters. It is shown that the torque ratio, experimental to calculated values, decreases in the region of GL<0.2mm. A method is given for calculating the values of BN caused by the stator slots and winding distribution, and variations of BN as a function of GL are obtained on a test motor. Effects of GL, number of stator slots per pole NS, width of the stator slot, skewed pitch, and winding distribution on the value of BN are investigated.
