Power Control in Dynamic Wireless Power Transfer

- Low-Speed Vehicle Testing with Active Rectification -

Abstract

In dynamic wireless power transfer (DWPT), maximum transferrable power is getting higher and higher to improve its commercial value. However, too much power transfer may cause damage in battery, especially when accompanied with regenerative braking. This work focuses on battery protection by on-board power control of DWPT. Active rectifier is chosen as a control device, and its controllability is evaluated in testing on electric vehicle running at low speed, which shows overshoot due to unmanaged switch timing. A new method, frequency deviation in active rectifier, is proposed as a countermeasure to the overshoot, and its effectiveness is validated in simulation.