Title :
Using Pulse Density Modulation to Improve the Efficiency of IGBT Inverters in Induction Heating Applications
Author :
Esteve, V. ; Jordán, J. ; Dede, E.J. ; Cases, C. ; Magraner, J.M. ; Sanchis-Kilders, E. ; Maset, E.
Author_Institution :
Univ. of Valencia, Burjassot
Abstract :
This paper analyses a high power (50 kW), high frequency (150 kHz) voltage fed inverter with a series resonant load circuit for industrial induction heating applications which is characterized by a full bridge inverter made with IGBT and the power control based on pulse density modulation (PDM). This power control strategy allows that the inverter works close to the resonance frequency for all output power levels. In this situation zero-voltage switching (ZVS) and zero-current switching (ZCS) conditions are performed and the switching losses are minimized. The results are verified experimentally using a prototype for induction hardening applications. A comparative study between the PDM and the classical frequency power control will be made.
Keywords :
induction heating; insulated gate bipolar transistors; power control; power semiconductor devices; resonant invertors; switching convertors; zero current switching; zero voltage switching; IGBT inverter; full bridge inverter; induction heating; power control strategy; pulse density modulation; series resonant load circuit; voltage fed inverter; zero-current switching; zero-voltage switching; Frequency; Industrial control; Insulated gate bipolar transistors; Power control; Pulse inverters; Pulse modulation; RLC circuits; Resonance; Zero current switching; Zero voltage switching; Induction heating; Pulse density modulated control; Series resonant inverter; power supplies;
Conference_Titel :
Power Electronics Specialists Conference, 2007. PESC 2007. IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4244-0654-8
Electronic_ISBN :
0275-9306
DOI :
10.1109/PESC.2007.4342194
