Title :
Unipolar voltage-cancellation control of resonant inverters for induction cooking appliances
Author :
Monterde, Fernando ; Burdío, José M. ; Hernández, Pablo ; García, José R.
Author_Institution :
Zaragoza Univ., Spain
fDate :
31 Aug-4 Sep 1998
Abstract :
Generally, power inverters for induction cooking appliances are controlled by varying frequency to control current through the inductor coil. When more than one power converter is operated at different frequencies greater than audible noise upper threshold, low frequency interharmonics are generated in common impedance due to nonlinear effects. Suppression of audible noise in multiple-coils induction cookers leads to high-performance fixed-frequency control. This paper presents a new unipolar voltage-cancellation control for series resonant inverters. This control strategy is used in full-bridge topologies for induction cookers, allowing fixed frequency control with ZVS operation over a wide power range. Performance of current-mode and voltage-cancellation is improved. This control is implemented in a series-resonant full-bridge inverter for induction cookers using IGBTs and digital control implemented in a PLD which can be easily implemented in an ASIC for mass production
Keywords :
bridge circuits; digital control; domestic appliances; induction heating; insulated gate bipolar transistors; power conversion harmonics; programmable logic devices; resonant power convertors; switching circuits; voltage control; ASIC; IGBT; PLD; ZVS operation; audible noise suppression; common impedance; current-mode performance; digital control; fixed frequency control; full-bridge topologies; high-performance fixed-frequency control; induction cooking appliances; low frequency interharmonics; multiple-coils induction cookers; nonlinear effects; power inverters; programmable logic device; resonant inverters; series-resonant full-bridge inverter; unipolar voltage-cancellation control; Acoustic noise; Coils; Frequency conversion; Home appliances; Impedance; Induction generators; Inductors; Power generation; Resonant inverters; Voltage control;
Conference_Titel :
Industrial Electronics Society, 1998. IECON '98. Proceedings of the 24th Annual Conference of the IEEE
Conference_Location :
Aachen
Print_ISBN :
0-7803-4503-7
DOI :
10.1109/IECON.1998.724199
