Journal of Applied Research in Electrical Engineering

Journal of Applied Research in Electrical Engineering

Design and Parameter Estimation of Series Resonant Induction Heating Systems Using Self-Oscillating Tuning Loop

Document Type : Research article

Authors
Behzad Jaafari
Alireza Namadmalan
Department of Electrical and Computer Engineering, Jundi-Shapur University of Technology, Dezful 64615-334, Iran
10.22055/jaree.2021.36904.1025
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
Subjects
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Journal of Applied Research in Electrical Engineering
Volume 1, Issue 1
Winter and Spring 2022
January 2022
Pages 42-49

  • Receive Date 13 March 2021
  • Revise Date 10 April 2021
  • Accept Date 18 April 2021