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PDM ZCS Resonant High Frequency Inverter for Induction Heated Roller  

Kang, Shin-Chul (Department of Electricity, Gyeongnam Provincial Namhae College)
Abstract
This paper presents a lossless inductor snubber-assisted series resonant high frequency inverter using the trench gate IGBTs for the electromagnetic induction eddy current-heated fixing roller in copy and printing machines in a new generation. This soft switching high-frequency inverter can completely achieve zero current soft switching (ZCS) commutation mode transitions and wide power regulation under its constant frequency pulse density modulation (PDM) scheme. Its transient and steady state operating principle is originally presented for a constant frequency PDM strategy under a ZCS operation, together with its output power regulation characteristics-based on the pulse density modulation. The effectiveness of this soft switching high-frequency inverter is confirmed for the fixing equipment with the induction-heated fixing roller.
Keywords
Lossless Inductor Snubber; ZCS; Pulse Density Modulation;
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