Document Type : Research article
Authors
Department of Electrical and Computer Engineering, Jundi-Shapur University of Technology, Dezful 64615-334, Iran
Abstract
This paper presents a design procedure and a new control method for power regulation of series resonant Induction Heating (IH) systems using a self-oscillating tuning loop. The proposed power regulator can accurately estimate the instantaneous phase angle and the main parameters of the resonant load. Moreover, the power control algorithm is devised based on a combination of Phase Shift (PS) and Pulse Density Modulation (PDM) methods. For simplicity, the tuning loop utilizes the PS control method for power regulation. Moreover, the Pulse Density Modulation (PDM) and frequency-sweep methods can be used in the proposed tuning loop. The new method is verified by a laboratory prototype with an output power of about 220 W and an operating frequency of about 60 kHz.
Highlights
- The proposed method has the capability of estimating the resonant tank parameters
- The control algorithm combined pulse density modulation and phase-shift modulations
- Power and frequency tuning loop properly works under large tolerances for the resonant tank
Keywords
- Self-Oscillating tuning loops
- Induction heating systems
- Phase-Shift control
- Series resonant inverters
Main Subjects
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