感应加热电源电容式PWM频率跟踪技术研究

2010 International Conference on Challenges in Environmental Science and Computer Engineering Pub Date : 2010-03-06 DOI:10.1109/CESCE.2010.210

Q. Xiao, Jie Zhao, Mingfa Wang

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引用次数: 3

摘要

分析了电容式PWM控制电路的原理，在开关器件中应用了软开关方案，给出了实用的主电路拓扑结构。对负载电流实现频率跟踪，使逆变器的功率因数接近或等于准谐振状态，对负载电流的频率进行跟踪。并对电路的相位补偿和启动进行了分析。通过试验验证了电容式PWM控制在串联IGBT逆变器组成的感应加热电源中的应用。

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Research on Frequency Tracking Capacitive PWM of Induction Heating Power Supply

The principle of capacitive PWM control circuit was analyzed in this paper, the soft-switching solution was applied in the switching devices, and the practical main circuit topology was given. On the load current to achieve a frequency tracking, To make the power factor of the inverter close to or equal to a quasi-resonant state, the Frequency of the load current was tracked. The phase compensation and start-up of the circuit were analyzed also. The application of the capacitive PWM control in the induction heating power supply composed with series IGBT inverter was correctly verified by the test.

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2010 International Conference on Challenges in Environmental Science and Computer Engineering

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