Abstract
Self oscillated resonant inverters have the advantages of low cost and simplicity. DC-AC power conversion can be achieved without using special drivers. In this study, self oscillated half bridge series resonant inverter topology is designed and applied to induction heater as a boiler part of home type absorption cooler system. The designed system has rapid and stable heating/cooling response compared to conventional resistance heated system. Self oscillated resonant inverter can achieve soft switching and maintain resonant tracking with simple and cheap drive circuit during all heating period. DOI: http://dx.doi.org/10.5755/j01.eee.19.10.5894
Highlights
Since self oscillating circuits have the advantages of simplicity, reliability and low cost [1], [2] they are used in high frequency applications such as electronic ballasts [3]– [5], dc-dc converters [6] and induction heating systems [7]– [9].Varying magnetic field in a metal due to induced eddy current generates heat [10]
Metallic work piece is placed inside an induction coil which creates time-varying magnetic fields at high frequencies
In the half bridge series resonant inverter the load current will be nearly sinusoidal for high quality factor (Q) applications
Summary
Since self oscillating circuits have the advantages of simplicity, reliability and low cost [1], [2] they are used in high frequency applications such as electronic ballasts [3]– [5], dc-dc converters [6] and induction heating systems [7]– [9]. Varying magnetic field in a metal due to induced eddy current generates heat [10]. In literature, this is called induction heating [11]. Microprocessor based controller [14], [17] to overcome the problem as mentioned Their control systems require auxiliary power supply, driver IC, hall-effect sensor and isolation circuit. The designed induction heated absorption cooler has 12 minutes better start up cooling characteristic than the resistance heated cooler
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