Single-switch AC–AC converter with high power factor and soft commutation for induction heating applications

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Single-switch AC–AC converter with high power factor and soft commutation for induction heating applications

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A new single-switch parallel resonant converter for induction heating is introduced. The circuit consists of an input LC filter, bridge rectifier and one controlled power switch. The switch operates in a soft commutation mode and serves as a high-frequency generator. Output power is controlled via a switching frequency. Steady-state analysis of the converter operation is presented. Theoretical analysis, computer simulation and experimental results are in good agreement.

Inspec keywords: switching circuits; bridge circuits; rectifying circuits; power factor; induction heating; commutation; AC-AC power convertors

Other keywords: high-frequency generator; induction heating; high power factor; bridge rectifier; input LC filter; single-switch parallel resonant converter; soft commutation; single-switch AC-AC converter; controlled power switch

Subjects: Power convertors and power supplies to apparatus; Process heating

References

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      • Calleia, H., Ordonez, R.: `Control circuit for induction heating inverter with active PFC', Proceedings of the IEEE Conference on Power electronics, 1998, p. 485–490.
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