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. 19, 2003
Haruo Suenaga, Katano, JP;
Kenji Yasui, Yamatokoriyama, JP;
Yoshiaki Ishio, Ikoma, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A high-frequency dielectric heating power control method comprises: detecting the input current of an inverter circuit for rectifying the voltage of an AC power source to convert the rectified voltage into an AC voltage of a predetermined frequency; rectifying the detected current to determine an input current waveform; shaping the waveform to determine a reference waveform; determining the difference between the input current waveform and the reference waveform; and mixing the differential information and the current control output by a mix circuit to convert the mixed one into the drive output of a switching transistor of the inverter circuit.