earticle

영어

On heavy load, the energy supplement in the starting process of Thyristor Power Supply for Parallel Resonant Induction Heating (TPSPRIH) has trouble in catching up its consumption which makes the system start more difficultly. Aimed at the puzzle, this paper proposes a starting strategy based on the analysis of parameters of heating inductor and starting circuit. Considered the process complexity in commonly used pre-charged circuit, it analyzed relationship among the parameters of heating inductor, the iron material and its filling status. Compared the supply speed with the decay characteristic of load circuit, the critical starting conditions of TPSPRIH on heavy load has been gotten, then derived the solving space of trigger angle of rectifier on energy providing. Based on the rated parameters of a typical system, the starting strategy of rectifier angle has been proposed. The simulation on different regions in the solving space has been made. The simulation result demonstrated the rationality and correctness. It probably provides a reference way for the reliable starting of TPSPRIH.