Control Optimization of Low-voltage Bus Contactor for CRH380B EMUs
This paper analyzes the low-voltage DC bus topology and the working principle of the power supply contactor for CRH380B EMUs,summarizes the fault types and fault modes of the low-voltage DC bus contactor,and conducts tests and research on the optimal control scheme for the low-voltage bus contactor.Firstly,introduce the circuit topology of the low-voltage DC bus of CRH380B EMUs,then explains control principle of the low-voltage bus contactor and its own working principle.Finally,the contactor failure modes are classified and inroduced.Based on the rectification carried out on the existing EMUs,an optimized control solution was proposed for the failure problem of the low-voltage bus contactor of CRH380B EMUs.The feasibility of the optimized solution was verified by ground simulation and the rectification performed on the existing EMUs.The results of the test demonstrate that the optimized control solution is feasible,the impact of a single contactor failure is manageable,and the likelihood of contactor failure is reduced.The proposed optimized solution systematically improves the stability of the bus power supply and reduces the impact of bus contactor failures on vehicle-level failures.
EMUCRH380Blow-voltage buscontactoroptimization controltest and research
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维普
