Constant Current Charging Control of LCC Resonant Permanent Magnet Mechanism Energy Storage Capacitor
Yuan Chenhu1,2, Du Yongheng1,2, Liu Xiaoming1,2, Wang Kun1,2, Duan Binwei1,2
1. Tianjin Key Laboratory of Advanced Technology of Electrical Engineering and Energy Tiangong University Tianjin 300387 China; 2. Postdoctoral Research Station in Mechanical Engineering Tiangong University Tianjin 300387 China
Abstract:Aiming at the problem of constant current charging of the on-off storage capacitors of the permanent magnet mechanism of the vacuum circuit breaker, based on the analysis of the output characteristics of the resonant current discontinuous mode (DCM) of the LCC resonant converter, a fuzzy constant current control algorithm was used. In order to solve the LCC resonant converter with charging voltage rise, traditional PFM control unable to maintain a constant current output and lead to power transmission loss of the defect, in this paper, by applying the idea of critical intermittent frequency tracking control, eliminating the accurate measurement of the parasitic capacitance parameter,the mathematical model of the critical frequency of intermittent tracking method was presented, and the fuzzy controller was established combining the real-time critical intermittent and reverse the resonant frequency to realize current zero cut-off and synchronous stream, and improve the efficiency of the power transmission, realize the energy storage capacity of permanent magnetic actuator for fast charging with constant current. The experimental results show that the fuzzy constant current control algorithm and the critical interrupted frequency tracking method proposed in this paper realize the constant current charging of the storage capacitor and have engineering feasibility.
袁臣虎, 杜永恒, 刘晓明, 王坤, 段斌伟. LCC谐振式永磁机构储能电容恒流充电控制[J]. 电工技术学报, 2020, 35(zk2): 432-439.
Yuan Chenhu, Du Yongheng, Liu Xiaoming, Wang Kun, Duan Binwei. Constant Current Charging Control of LCC Resonant Permanent Magnet Mechanism Energy Storage Capacitor. Transactions of China Electrotechnical Society, 2020, 35(zk2): 432-439.
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