6533b7dafe1ef96bd126eae6

RESEARCH PRODUCT

Control circuit design of the L-LC resonant inverter for induction heating

S. CasansJosé M. EspíJ. MaicasA.e. NavarroJuan B. Ejea

subject

EngineeringInduction heatingbusiness.industryControl theoryAutomatic frequency controlPhase (waves)Block diagramControl circuitbusinessStability (probability)Resonant inverterCompensation (engineering)

description

In this article, the frequency variation control strategy for an induction heating L-LC resonant inverter is analyzed. The control consists of three loops, which are analyzed and reduced to their corresponding small-signal block diagrams. From these diagrams, the optimal structure of the compensation network and the design boundaries for first order closed-loop response are derived. The special case of phase limitation is analyzed because it is unstable in open-loop operation. Finally the implementation of the control circuit is described and experimental results are shown.

yearjournalcountryeditionlanguage
2002-11-082000 IEEE 31st Annual Power Electronics Specialists Conference. Conference Proceedings (Cat. No.00CH37018)
https://doi.org/10.1109/pesc.2000.880518