A wide range on‐line energy acquisition method for transmission lines based on resonant choke coil

Abstract

Abstract To the traditional transmission line induction energy acquisition method, large starting current and small output power are the key problems that hinder its wide application in transmission line detection system or detection robot. This paper proposes a wide range on‐line energy acquisition method to solve the problems. By analysing, how large the impedance of the transmission line determines how much power can be transmitted into the parallel connected devices. The novel method tries to couple a high impedance into the transmission line by using a choke coil that is parallel resonated with a matching capacitor. Consequently, the current shunt to the parallel‐connected load will increase and the power output can be significantly improved. Simulation and experiment results show that the novel method can harvest more output power than the conventional inductive acquisition method under the condition of the same bus current and the same magnetic core.