AC-AC CONVERTER FOR HIGH-FREQUENCY INDUCTION HEATING APPLICATIONS
- A
new zero voltage soft-switching (ZVS) utility frequency ac(UFAC) to high-frequency ac (HFAC) resonant power converter for induction
heating (IH) applications is presented in this article.
- The series resonant ac-ac
converter proposed herein can process the frequency conversion without any
diode bridge rectifier (DBR), thereby reducing the relevant conduction power
losses.
- In addition, power factor correction (PFC) can be naturally achieved by
the inductor-based boost half bridge (BHB) circuit with the non-smoothed dc
(NSDC)-link.
- The operation principle together with a IH load power regulation
scheme is described, and the converter performances including ZVS operations
and PFC are demonstrated in an experiment with a 3.0kw–30 khz prototype by
comparing with the previously developed converter.
- Finally, the feasibility of
the proposed ac-ac converter is evaluated from a practical point of view
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