Title :
Analysis of Three-Level ZVS PWM Inverter for Induction Heating Applications
Author :
Jangwanitlert, A. ; Songboonkaew, J. ; Thammasiriroj, W. ; Balda, J.C.
Author_Institution :
Dept. of Electr. Eng., King Mongkut´´s Inst. of Technol., Bangkok
Abstract :
This paper presents an operation analysis of a high frequency three-level (TL) PWM inverter applied for an induction heating applications. The feature of TL inverter is to achieve zero-voltage switching (ZVS) at above the resonant frequency. The circuit has been modified from the full-bridge inverter to reach high-voltage with low-harmonic output. The device voltage stresses are controlled in a half of the DC input voltage. The prototype operated between 70 and 78 kHz at the DC voltage rating of 580 V can supply the output power rating up to 3000 W. The iron has been heated and hardened at the temperature up to 800degC. In addition, the experiments have been successfully tested and compared with the simulations
Keywords :
DC-AC power convertors; PWM invertors; bridge circuits; induction heating; iron; radiofrequency heating; resonant invertors; switching convertors; zero voltage switching; 580 V; 70 to 78 kHz; DC voltage rating; DC-AC power converters; Fe; ZVS; full-bridge inverter; high-frequency three-level PWM inverter; induction hardening; induction heating; iron bar; resonant frequency; voltage stresses; zero-voltage switching; Circuits; Iron; Power generation; Power supplies; Prototypes; Pulse width modulation inverters; Resonant frequency; Stress control; Voltage control; Zero voltage switching; Three-level PWM inverter; induction heating; zero-voltage switching;
Conference_Titel :
Power Electronics and Motion Control Conference, 2006. IPEMC 2006. CES/IEEE 5th International
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0448-7
DOI :
10.1109/IPEMC.2006.4778210
