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:
Apr. 27, 2004
Filed:
Nov. 19, 2002
Nicholas Bassill, Malibu, CA (US);
Jih-Sheng Lai, Blacksburg, VA (US);
Other;
Abstract
An induction heating method and device comprise an inductive heat source ( ) having a controller ( ), a resonant converter ( ) and an induction coil ( ). The controller ( ) generates a variable frequency variable duty cycle control voltage in response to a power setting. The variable duty cycle of the control voltage decreases in response to an increase in the variable frequency of the control voltage. In response to the control voltage, the resonant power converter ( ) generates an output between a first node ( ) and a second node ( ). Coupled between the first and second nodes ( ), the induction coil ( ) varies the amount of heat it produces in response to the output power.