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:
Jun. 07, 2005
Filed:
Jun. 04, 2003
Applicant:
William A. Peterson, Vestal, NY (US);
Inventor:
William A. Peterson, Vestal, NY (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P001/18 ;
U.S. Cl.
CPC ...
Abstract
An apparatus includes a driver circuit including electronic switches operable to deliver voltage and current to a polyphase motor; and a control circuit operable to provide driver control signals to the driver circuit to commutate the electronic switches, the control circuit (i) producing the driver control signals using a first pulse width modulation (PWM) mode when the polyphase motor produces a substantially non-zero acceleration torque; and (ii) producing the driver control signals using a second PWM mode when the polyphase motor produces a substantially zero acceleration torque.