A closed-loop power controller model of series-resonant-inverter-fitted induction heating system

Abstract

This paper presents a mathematical model of a power controller for a high-frequency induction heating system based on a modified half-bridge series resonant inverter. The output real power is precise over the heating coil, and this real power is processed as a feedback signal that contends a closed-loop topology with a proportional-integral-derivative controller. This technique enables both control of the closed-loop power and determination of the stability of the high-frequency inverter. Unlike the topologies of existing power controllers, the proposed topology enables direct control of the real power of the high-frequency inverter.

Photovoltaic Integrated Solar Induction Heater using Voltage Source Inverter

“…DC voltage is obtained from the stored electrical energy which is used to converted into high frequency (kHz) alternating voltage to generate high electromagnetic field in the induction coil and finally the heat is produced in the induction coil. [10][11][12][13] IGBT (Insulated Gate Bipolar Transistor) is used as switching device for generating the alternating voltage. When the alternating current passes through the coil, a magnetic field is formed around the coil, According to Ampere's Law it can be write,…”