Title :
The state of the art advanced developments of series-resonant high-frequency inverter using static induction transistors/power modules
Author :
Ogiwara, H. ; Nagai, S. ; Nakaoka, M. ; Hamada, S.
Author_Institution :
Dept. of Electr. Eng., Ashikaga Inst. of Technol., Japan
Abstract :
The development of a voltage-fed series resonant, high-frequency pulse-width modulation (PWM) inverter system using high-power static induction (SI) transistors/power modules for an induction-heating power supply is discussed. The inverter system, an alternate fast-response power regulation scheme incorporating either a fixed-frequency PWM or a variable-frequency PWM control strategy, as compared with the conventional PWM and PWM hybrid control strategy, is described, including the protection control hardware. It is shown the the load current-adaptive frequency tracking-based PWM control implementation using a two-channel, phase-locked loop system with protection logic hardware is effective in minimizing switching losses and stresses. It also reduces EMI noise level, accomplishes fast-response voltage regulation, and solves dead-short circuit problems that are due to fast-recovery diode characteristics in a power regulation process. Computer-aided simulation results and experimental results based on a 200 kHz-20 kW/40 kW breadboard using the optimum drive-circuit and interface of SI transistors are presented.<>
Keywords :
field effect transistors; induction heating; invertors; phase-locked loops; power supplies to apparatus; pulse width modulation; thermal variables control; voltage control; 20 kW; 200 kHz; 40 kW; EMI noise level; PWM; computer simulation; control strategy; dead-short circuit problems; fast-recovery diode characteristics; fast-response power regulation scheme; fixed-frequency PWM; induction-heating power supply; load current-adaptive frequency tracking-based; phase-locked loop system; protection control hardware; protection logic hardware; pulse-width modulation; series-resonant high-frequency inverter; static induction power modules; static induction transistors; switching losses minimisation; switching stresses; variable-frequency PWM; voltage-fed; Control systems; Hardware; Power system protection; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Pulsed power supplies; Resonance; Transistors; Voltage;
Conference_Titel :
Industry Applications Society Annual Meeting, 1990., Conference Record of the 1990 IEEE
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-87942-553-9
DOI :
10.1109/IAS.1990.152467
