Embedded controlled low‐frequency AC to high‐frequency AC converter fed induction heater

Abstract

Purpose

The purpose of this paper is to present, a novel boost‐active clamp bridge single stage high‐frequency zero voltage soft‐switching‐pulse width modulation (ZVS‐PWM) inverter, which converts the utility frequency AC power into high‐frequency AC power with an embedded controller. This single stage high‐frequency inverter is composed of a single‐phase diode bridge rectifier, a non‐smoothing filter, a boost‐active clamp bridge type ZVS‐PWM high‐frequency inverter, and an induction‐heated load with planar type litz wire working coil assembly. Also, the paper discusses how to extend the soft‐switching operation ranges and improve power conversion efficiency.

Design/methodology/approach

The proposed converter is simulated and it is implemented using embedded controller.

Findings

It was found that the single stage high‐frequency induction heating (IH) inverter using boosted voltage function can eliminate the DC and low‐frequency components of the working coil current and reduce the power dissipation of the circuit components and switching devices.

Originality/value

The paper shows that the PWM HF inverter is preferred for IH, since it has reduced switching losses and switching stresses. The paper can be extended to PC‐based wireless control, which can be part of a distributed control system in major industrial heating systems.

Citation

Dhandapani, K. and Reddy Sathi, R. (2011), "Embedded controlled low‐frequency AC to high‐frequency AC converter fed induction heater", Journal of Engineering, Design and Technology, Vol. 9 No. 1, pp. 7-18. https://doi.org/10.1108/17260531111121431