Wenxu Yan

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To realize dynamic positioning of the shearer, a new method based on SINS/WSN is studied in this paper. Firstly, the shearer movement model is built and running regularity of the shearer in coal mining face has been mastered. Secondly, as external calibration of SINS using GPS is infeasible in enclosed underground mine, WSN positioning strategy is proposed(More)
This paper presents a high-frequency series-resonant inverter for induction heating applications, which is characterized by the pulse-density-modulation (PDM) and phase-shift-modulation (PSM) hybrid power control strategy. The inverter is kept to work at load resonant state for all load conditions and achieves zero-current-switching or(More)
Using a Boost chopper to implement the Maximum Power Point Tracking (MPPT) for a PMSG-based small-scale wind turbine is described in this paper. By analyzing the characteristics of the Boost chopper, the optimal duty ratio was theoretically determined by the equivalent resistance of the load. Then the duty ratio was used as a reference instruction to(More)
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