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Analysis and Design of a Wide Air Gap IPT System with Multi-Load CV Characteristics Based on Cylindrical Solenoid Coupler

This paper proposes a 2.5m multi-load Inductive power transfer (IPT) system with a Constant Voltage (CV) output for each load. Five Power Transfer Coils (PTC) based on Cylindrical Solenoid Coupler (CSC) are used to transfer power, and three Power Coils (PC) are snapped around the corresponding PTCs to achieve isolation of the system power supply and pickup. The system achieves power supply to more state detection equipment of High Voltage (HV) device in long-distance simultaneously. When the parasitic resistance of the coil is ignored, the CV characteristics can be derived, allowing for independent and adjustable power control of each load. Furthermore, the impact of parasitic resistances on system performance is studied. An experimental setup is built to validate the proposed long-distance IPT system, and the system efficiency reaches 66.7% when each load power is 10W.