Abstract
The induction heating process at a domestic level is getting attention nowadays as this power converting topology ensures clean, reliable, flexible, and fast operation. The low input frequency is converted to required regulated high output frequency with indirect and direct power converting approaches. The circuit and control complexity and high conversion losses associated with indirect power converting approaches lower their uses for domestic induction systems. The direct ac-ac power conversion approach is one of the viable solutions for low and medium power level loads, especially for domestic induction heating loads. The circuit complexity, cost, and conversion losses of the direct power converting systems depend on the number of the controlled switching devices as each controlled switch requires one gate driving circuit and one isolated dc supply. Simplified pulse width modulation (PWM) switching control also lower their control effort. Therefore, in this article, a simplified direct ac-ac power converting approach is introduced for a high-frequency domestic induction heating system. Here, the regulation of the high output frequency is achieved by simply cascading the single-phase full-bridge rectifier with a full-bridge inverter with a simple control strategy. The characteristics of the developed topology are validated through simulation results of the Simulink-based platform and practical results of the developed practical setup.
Highlights
The widespread use of induction heating at a domestic level is due to its clean, reliable, fast, flexible, and highly efficient operation [1,2,3,4]. The popularity of this heating system is due to the development of high-frequency switching converters
These power converting circuits are extensively employed in induction heating systems and wireless power transfer systems
This comparison validates the effectiveness of the proposed circuit topology as it requires fewer switching transistors, gate driving circuits, isolated dc supplies, and simple control schemes
Summary
The widespread use of induction heating at a domestic level is due to its clean, reliable, fast, flexible, and highly efficient operation [1,2,3,4] The popularity of this heating system is due to the development of high-frequency switching converters. This would add unwanted delays, and the overall arrangement for the generation of the control signals becomes complicated These types of matrix converters are not well suited for the application where only frequency regulation is required. The variable frequency at the output is insured by alternatively inverting and non-inverting the input voltage for both half cycles of the input voltage
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