Abstract
An induction heating appliance used for cooking includes more than one inductor, each being controlled by a separate inverter system. The main aim of this paper is to control each coil separately at a different frequency and power output by using the same inverter system. A working coil of two parts has been designed practically and a computer simulation has been carried out, using practical coil parameters. Each part of the coil has been operated at a different frequency and power output, which allows the use of vessels of two different diameters while obtaining a high coupling factor for both conditions. This also increases the efficiency of the system and improves power quality. The proposed topology can be applied to induction hotplates made up of several inductors in which the power and frequency must be separately regulated.
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