The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 2001
Filed:
Feb. 08, 2000
Renyan William Fei, St. Louis, MO (US);
Emerson Electric Co., St. Louis, MO (US);
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.