Design optimization of permanent magnet array in rotary induction heater

Nowadays, induction heating (IH) technology; plays an important role in metal process due to its advantages such as efficiency, cleanness and safety. Among lots of IH solutions, rotary permanent magnet induction heater is proved to be a suitable one, especially for the nonmagnetic metal. Since the energy transfer efficiency improvement highly relies on the dimensional design of permanent magnet (PM) array, this paper presents an approach to optimize the PM array in one typical rotary induction heater configuration. The optimization principles of PM array are obtained based on three-dimensional finite element simulation results.