Abstract
In the current scenario, power electronic device-based induction heating (IH) technologies are widely employed in domestic cooking, industrial melting and medical applications. These IH applications are designed using different converter topologies, modulation and control techniques. This review article mainly focuses on the modelling of half-bridge series resonant inverter, electrical and thermal model of IH load. This review also analyses the performance of the converter topologies based on the power conversion stages, switching frequency, power rating, power density, control range, modulation techniques, load handling capacity and efficiency. Moreover, this paper provides insight into the future of IH application, with respect to the adaptation of wide band-gap power semiconductor materials, multi-output topologies, variable-frequency control schemes with minimum losses and filters designed to improve source-side power factor. With the identified research gap in the literature, an attempt has also been made to develop a new hybrid modulation technique, to achieve a wide range of power control with high efficiency. A 100 W full-bridge inverter prototype is realised both in simulation and hardware, with various modulation schemes using a PIC16F877A microcontroller. The results are compared with existing techniques and the comparisons reveal that the proposed scheme is highly viable and effective for the rendered applications.
Highlights
New-era residential induction heating appliances pave the way for the replacement of conventional electrical and gas heating technologies
This review summarises the state of art of power converters, modulation techniques and a control algorithm used in various induction heating (IH) applications and proposes the hybrid modulation technique to achieve a high level of power control with higher efficiency
An RLC parallel resonant circuit is used for CSI-fed IH topologies, which reduces the current flowing through the switches
Summary
New-era residential induction heating appliances pave the way for the replacement of conventional electrical and gas heating technologies. The Foucault current flow is caused on the surface of the load when the work piece is shortcircuited and material gets heated due to Joule’s law of heating. This methodology of IH is mostly accepted. A high-frequency inverter facilitates DC to HFAC In both stages, the filter designs are vital to improving the overall efficiency and meeting the power quality compliances. This review summarises the state of art of power converters, modulation techniques and a control algorithm used in various IH applications and proposes the hybrid modulation technique to achieve a high level of power control with higher efficiency.
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