Title page for ETD etd-06062008-155400
|Type of Document
||Analysis and design of a 500 kHz series resonant inverter for induction heating applications
|Lee, Fred C.
|Johnson, Lee W.
|Jovanovic, Milan M.
|Stephenson, F. William
- DC analysis
- induction heating
- small-signal analysis
|Date of Defense
The steady state model and analysis of a phase-shift controlled series resonant
inverter (PSC-SRl) is presented. This steady state model includes the evaluation of the
zero-voltage switching (ZVS) condition and the determination of the ZVS operating
region. Based upon this analysis a frequency control strategy that minimizes circulating
energies is proposed. Also, a methodology to design the power stage components, and to
predict the duty ratio and the operating frequency range is presented using a PSC-SRl
design example operating at 500 kHz and 10 kW. In addition, a novel and simple
frequency control circuit that implements the proposed frequency control strategy is
provided. Besides, the analysis of the PSC-SRl complete power stage and two control-loop
system (frequency control and duty ratio control) is given. Furthermore, the small-signal
model and the compensation schemes for each of the control loops is presented.
The analytical predictions are compared with experimental data measured from a 500
kHz, 10 kW laboratory prototype and conclusions are drawn.
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