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:
Aug. 23, 2022
Filed:
Jun. 27, 2019
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Abstract
A resonance type power supply device includes: a power supply main circuit having a transformer, a resonance element connected on a primary side of the transformer, and a plurality of switching elements connected to the resonance element; and a power supply control circuit switching the plurality of switching elements in the power supply main circuit with a predetermined switching frequency, in which the power supply control circuit includes: a voltage controller outputting a current command value from a reference voltage, an output voltage of the power supply main circuit, and a voltage control gain; a current controller calculating a reference current, a current flowing on a secondary side of the transformer, and a current control gain; a gain calculator outputting the voltage control gain and the current control gain; and a control signal generator controlling the plurality of switching elements based on the switching frequency outputted by the current controller, and the gain calculator outputs the voltage control gain or current control gain that is proportional to the switching frequency outputted by the current controller.