A Current-Fed Parallel Resonant Push-Pull Inverter with a New Cascaded Coil Flux Control for Induction Heating Applications

Alireza Namadmalan; Javad Shokrollahi Moghani; Jafar Milimonfared

A Current-Fed Parallel Resonant Push-Pull Inverter with a New Cascaded Coil Flux Control for Induction Heating Applications

Alireza Namadmalan

Javad Shokrollahi Moghani

Jafar Milimonfared

Vol. 11, No. 5, pp. 632-638, Sep. 2011

10.6113/JPE.2011.11.5.632

IH systems

Current Source Parallel Resonant Push-pull Inverter

cascaded control method

PLL Circuits

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Abstract

This paper presents a cascaded coil flux control based on a Current Source Parallel Resonant Push-Pull Inverter (CSPRPI) for Induction Heating (IH) applications. The most important problems associated with current source parallel resonant inverters are start-up problems and the variable response of IH systems under load variations. This paper proposes a simple cascaded control method to increase an IH system’s robustness to load variations. The proposed IH has been analyzed in both the steady state and the transient state. Based on this method, the resonant frequency is tracked using Phase Locked Loop (PLL) circuits using a Multiplier Phase Detector (MPD) to achieve ZVS under the transient condition. A laboratory prototype was built with an operating frequency of 57-59 kHz and a rated power of 300 W. Simulation and experimental results verify the validity of the proposed power control method and the PLL dynamics.

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Cite this article

[IEEE Style]

A. Namadmalan, J. S. Moghani, J. Milimonfared, "A Current-Fed Parallel Resonant Push-Pull Inverter with a New Cascaded Coil Flux Control for Induction Heating Applications," Journal of Power Electronics, vol. 11, no. 5, pp. 632-638, 2011. DOI: 10.6113/JPE.2011.11.5.632.

[ACM Style]

Alireza Namadmalan, Javad Shokrollahi Moghani, and Jafar Milimonfared. 2011. A Current-Fed Parallel Resonant Push-Pull Inverter with a New Cascaded Coil Flux Control for Induction Heating Applications. Journal of Power Electronics, 11, 5, (2011), 632-638. DOI: 10.6113/JPE.2011.11.5.632.