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:
Oct. 26, 1999
Filed:
Sep. 28, 1998
Applicant:
Inventors:
Jean-Michel Orsat, Chatillon sur Cluses, FR;
Serge Bruno, Marnaz, FR;
Assignee:
Somfy, Cluses, FR;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318781 ; 318782 ; 318786 ;
Abstract
A motor whose stator is equipped with a main winding (DP) and with an auxiliary winding which consists of two half-windings (B1, B2) that are wound in opposite directions and is supplied through a full-wave rectifier (GR) and by means of two commutating switches (T1, T2) controlled by a control circuit (COM) which alternately closes the switches at a frequency equal to the frequency of the supply voltage. The motor comprises, in parallel with the half-windings, at least one device (DAP) which limits the voltage across the terminals of the switches when they are opened, to a value higher than the supply voltage.