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:
Oct. 30, 2012
Filed:
Oct. 25, 2010
Yao-ching Hsieh, Kaohsiung, TW;
Cheng-yen Chen, Kaohsiung, TW;
Jian-yi Hong, Kaohsiung, TW;
Po-wen Hsueh, Kaohsiung, TW;
Yao-Ching Hsieh, Kaohsiung, TW;
Cheng-Yen Chen, Kaohsiung, TW;
Jian-Yi Hong, Kaohsiung, TW;
Po-Wen Hsueh, Kaohsiung, TW;
Metal Industries Research & Development Centre, Kaohsiung, TW;
Abstract
The present invention relates to a single-stage zero-current switching driving circuit for ultrasonic motor, which comprises: a buck-boost converter and a zero-current switching resonant inverter. The driving circuit according to the present invention integrates the buck-boost converter and the resonant inverter into a single-stage structure, so that the buck-boost converter and the resonant inverter share an active switch and a trigger signal, and therefore, the circuit is simplified and the loss caused by stage switching is reduced. Moreover, the buck-boost converter operates in a discontinuous-conduction mode (DCM), which allows the circuit to have high power factor, and enables the active switch to be capable of zero-current switching (ZCS), so that the loss caused by switching is largely reduced. In the driving circuit according to the present invention, there's no interaction of power between the buck-boost converter and the resonant inverter, so that the two circuits can be analyzed individually. Therefore, the driving circuit according to the present invention having simplified circuit, low loss caused by switching, and low manufacturing cost, can be a competitive product after being commercialized.