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This paper analyzes the relationship between the load and the efficiency of contactless transformer with multi-pickups which are in series or parallel connection. An optimal load resistance is obtained with parameters of contactless transformer at which the efficiency is the highest. Connection mode of multi-pickups affects the optimal load resistance, which is larger at series but smaller at parallel...
To transfer large power in inductively coupled power transfer (ICPT) system, parallel secondary pickups are adopted. Because of the error of installation and measure, the parameters of parallel pickup modules are not completely consistent, resulting in the current unbalance or even over- current in parallel modules, which will damage the elements like resonant capacitance, even destabilize the system...
A segment control scheme of inductive power transfer (IPT) system for rail transit is proposed in this paper. In this scheme, the power supply range of primary coils along the track is segmented into several intervals and the several sets of pickups are installed aboard. When the vehicle runs, the switching frequency and the reference current of inverters is modulated with the position of the pickup...
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