NDLI: Adjustable Frequency Quasi-Resonant InverterCircuits Having Short-Circuit SwitchAcross Resonant Capacitor

Content Provider	IEEE Xplore Digital Library
Author	Okudaira, S. Matsuse, K.
Copyright Year	1986
Abstract	Recently dual frequency induction heating is often performed for hardening an uneven work-piece such as a gear which has tips and bottoms, and two resonant inverters are necessary for such heating. In this paper, new quasi-resonant inverter circuits including a resonant capacitor with a short-circuit switch, which can operate at various frequencies are discussed. First, an equivalently variable resonant capacitor having a short-circuit switch in parallel is described for varying output frequency of the quasi-resonant inverter. Then, two types of adjustable frequency quasi-resonant inverter circuits including the variable resonant capacitor are reported in every desired range of the adjustable output frequency. Additionally a new indirect power control method is proposed since the power to the work-piece cannot be directly detected in operation and the equivalent output resistance of the heating circuit is unknown.
Sponsorship	IEEE Power Electronics Society
Starting Page	1830
Ending Page	1838
Page Count	9
File Size	803802
File Format	PDF
ISSN	08858993
Volume Number	23
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency Resonance Resonant inverters Switches Pulse width modulation inverters Switched capacitor circuits Switching circuits RLC circuits Power control Capacitance short-circuit switch Adjustable frequency dual frequency induction heating power control quasi-resonant inverter
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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