The tundish induction heating power supply (TIHPS) is one of the most important equipment in the continuous casting process for metallurgical manufacturing. Specially, the constant temperature control is greatly significant for metallurgical manufacturing. In terms of the relationship between TIH load temperature and output power of TIHPS, the constant temperature control can be realized by power control. In this paper, a TIHPS structure with three-phase PWM rectifiers and full-bridge cascaded inverter is proposed. Besides, an input harmonic current blocking strategy and a load voltage feedforward control are also proposed to realize constant temperature control. To meet the requirement of the system, controller parameters are designed properly. Experiments are conducted to validate the feasibility and effectiveness of the proposed TIHPS topology and the control methods.
岳雨霏, 徐千鸣, 郭鹏, 罗安. 用于冶金制造的中间包感应加热电源的恒温控制[J]. Frontiers in Energy, 2019, 13(1): 16-26.
Yufei YUE, Qianming XU, Peng GUO, An LUO. Constant temperature control of tundish induction heating power supply for metallurgical manufacturing. Front. Energy, 2019, 13(1): 16-26.
Load current frequency fo/Hz Load temperature reference T*/C
200 1000
Tab.1
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Fig.11
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