DocumentCode :
1916852
Title :
High-frequency inverter with phase-shifted PWM and load-adaptive PFM control strategy for industrial induction-heating
Author :
Nagai, Satoshi ; Nagura, Hirokazu ; Nakaoka, Mutsuo ; Okuno, Atsushi
Author_Institution :
Dept. of Electr. & Electron. Eng., Kobe Univ., Hyogo, Japan
fYear :
1993
fDate :
2-8 Oct 1993
Firstpage :
2165
Abstract :
The authors describe a control scheme incorporated in the voltage-fed full-bridge series resonant high-frequency inverter using static induction high power transistors (SITs), which is based on a load-adaptive variable frequency modulated phase-shift PWM (pulse-width modulation) control strategy. The operating principle of the load-adaptive variable frequency PWM series resonant inverter system with a new control scheme is described along with its operating characteristics in steady state. The 20 kW-200 kHz prototype inverter system suitable for induction heating in industry is demonstrated, including a specially designed power transformer. SIT stacks with a water cooling system, and a building-block assembly for high-power use. Experimental results and simulation results are presented. Finally, an improved variable frequency PWM series resonant inverter topology incorporating partially inserted capacitive lossless snubbers is proposed for soft switching and compared with the inverter mentioned above
Keywords :
adaptive control; bridge circuits; circuit resonance; field effect transistors; induction heating; invertors; power transformers; power transistors; pulse frequency modulation; pulse width modulation; switching circuits; voltage control; 20 kW; 200 kHz; SITs; capacitive lossless snubbers; induction heating; industry; load-adaptive PFM control; operating characteristics; operating principle; phase-shifted PWM; power transformer; power transistors; soft switching; topology; voltage-fed full-bridge series resonant high-frequency inverter; water cooling; Control systems; Frequency modulation; Phase modulation; Power transistors; Pulse inverters; Pulse width modulation inverters; Resonance; Resonant frequency; Resonant inverters; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industry Applications Society Annual Meeting, 1993., Conference Record of the 1993 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-1462-X
Type :
conf
DOI :
10.1109/IAS.1993.299167
Filename :
299167
Link To Document :
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