Lightweight Controllable Charging Load For Motion Detection Of Off-Board Charger

In view of the fact that the electronic load used in the on-site detection of the electric vehicle off-board charger is large and heavy, and it would be limited by some external factors such as the space and load of the detection vehicle and the height of the underground garage. In addition, considering that if using the power batteries of mobile detection vehicle as charging load directly, it's charging modes and parameters are unitary, the state of charge (SOC) and electromotive force also cannot be flexibly set, which would result in long charging time, low efficiency, limited test range and items. This paper proposes a topological scheme that the lightweight controllable charging load consists of a vehicle-mounted power battery pack and a cascaded DC/DC converter, researches the double-closed loop control methods such as constant input voltage, constant load resistance as well, further comes true the typical working modes: constant input voltage, constant load resistance. Moreover the operating modes have the ability to continuously adjust in the rated range. In a word, the proposed scheme can achieve self-test of the off-board charger while reducing the weight of the charging load. Finally, the simulation model in Matlab/Simulink is established to verify the feasibility of the proposed topology and the effectiveness of the control methods.