An Optimal Selection of Induction-Heater Capacitance Considering Dissipation Loss Caused by ESR

In the design of a parallel resonant induction-heating system, choosing a proper capacitance for the resonant circuit is quite important since both output-power maximization and capacitor heat loading should be considered. The temperature rise often blows up the water-cooled capacitors in high-power...

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Bibliographic Details
Published in:IEEE transactions on industry applications 2007-07, Vol.43 (4), p.1117-1125
Main Authors: Lee, Junggi, Lim, Sunkyoung, Nam, Kwanghee, Choi, Dongik
Format: Article
Language:English
Subjects:
Capacitance
Capacitors
Circuit simulation
Equivalence
Equivalent circuits
Equivalent series resistance (ESR)
Heaters
Heating equipment
induction heater
Mathematical models
Maximization
optimal selection
Optimization
parallel resonant circuit
Paramagnetic resonance
Power capacitors
Power generation
Resistance heating
RLC circuits
Temperature
Water heating
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Summary:In the design of a parallel resonant induction-heating system, choosing a proper capacitance for the resonant circuit is quite important since both output-power maximization and capacitor heat loading should be considered. The temperature rise often blows up the water-cooled capacitors in high-power induction heaters or reduces the lifetime of capacitors significantly. This paper, therefore, presents a method of finding an optimal capacitance that maximizes the output power while considering the capacitor loss at the same time. To count the effect of the capacitor heatup, an equivalent series resistance is included in the model. Based on the equivalent circuit model, the output power and the capacitor loss are obtained as the functions of capacitance, and an optimization technique is applied treating the capacitance as a control variable. The effectiveness of the proposed method is verified by simulations and experiments. Equivalent series resistance (ESR), induction heater, optimal selection, parallel resonant circuit.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2007.900490