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:
Jul. 23, 2013
Filed:
Nov. 18, 2009
Haruo Suenaga, Osaka, JP;
Kenji Yasui, Nara, JP;
Shinichi Sakai, Nara, JP;
Nobuo Shirokawa, Nara, JP;
Hideaki Moriya, Nara, JP;
Manabu Kinoshita, Nara, JP;
Haruo Suenaga, Osaka, JP;
Kenji Yasui, Nara, JP;
Shinichi Sakai, Nara, JP;
Nobuo Shirokawa, Nara, JP;
Hideaki Moriya, Nara, JP;
Manabu Kinoshita, Nara, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A power control unit for high-frequency dielectric heating is provided, and includes an input current detection section for detecting input current from the AC power supply to the inverter circuit and outputting input current waveform information. A conversion section converts the input current waveform information into a drive signal of the switching transistor of the inverter circuit so that instantaneous fluctuation of the input current waveform information is suppressed. A mix circuit mixes the input current waveform information and power control information for controlling so that current or voltage at an arbitrary point of the inverter circuit becomes a predetermined value and generates an on voltage signal. The conversion section converts the on voltage signal into the drive signal so that the on time is shortened in the portion where the input current is large and that the on time is prolonged in the portion where the input current is small.