Capacitor start single phase induction motor with partial winding starting

Abstract

A motor includes a stator core, a rotor in rotational relationship with the stator core and a main winding on the core. In one form, the main winding includes a 4-pole configuration and an 8-pole configuration and the motor has a 4-pole auxiliary winding on the core. A switching circuit selectively simultaneously energizes a portion only of the 4-pole configuration of the main winding and the 4-pole auxiliary winding when starting the motor for energizing the main winding in the 8-pole configuration. In another form, the main winding includes a 2-pole configuration and an 4-pole configuration and the motor has a 2-pole auxiliary winding on the core. In this latter form, the switching circuit selectively simultaneously energizes a portion only of the 2-pole configuration of the main winding and the 2-pole auxiliary winding when starting the motor for energizing the main winding in the 4-pole configuration. Other forms include a 4/6/8 pole motor, an n/m pole motor and an n/m/p pole motor where n, m, and p are even integers and n<p<m.

Dependencies are inferred from the claim text.