The Study of Influence of Frequency and Work-Piece Diameter on Heating Speed for Induction Heating

• Main Authors: ming-tang jian, 簡明堂
• Other Authors: Chin-Man Ho
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/99378583650813057670

碩士 === 中原大學 === 電機工程研究所 === 96 === Compared with conventional direct heating, the induction heating has been widely used and rapidly developed for industrial applications, because it has many advantages such as high-speed heating, safety, high quality, cleanliness, and etc. On the other aspect, with tremendous advantage of the latest power semiconductor devices, the switches of inverter can operate in higher frequency ranges. Therefore, the induction-heating systems can reach small, compact, and efficient properties. The principle of the induction heating is based on a main way of utilizing a phenomenon of electromagnetic induction to heat metal devices. High-frequency alternating current feed in heating coils in order to produce an alternating magnetic field. Then, the work-piece in the magnetic field will induce eddy current to heat itself. In this study, a load series resonant induction heating system with voltage source full bridge inverter has been constructed and use phase-shift pulse width modulation to incorporate leakage inductance of the transformer to achieve zero-voltage-switching, therefore reduce the loss in switches and increase the efficiency of the system. Finally, the operation characteristics and heating performance of the induction heating system are analyzed and discussed.