Study of an Electric Vehicle Drive Dynamic Testing System with Energy Recovery

To save the test energy of the electric drive vehicle, an electric vehicle drive dynamic testing system, with energy recovery is proposed. The electric vehicle DC/AC power drive can be regulated by a speed control mode and a torque control mode in a three-phase electric vehicle induction motor. The three-phase electric vehicle induction motor is directly coupled with a three-phase load induction motor through a coupler. The load of the DC/AC power drive is also regulated by the torque control mode and the speed control mode to drive the three-phase load induction motor. The three-phase load induction motor is operated in the regenerative braking mode, and the regenerative energy of the load induction motor can be transferred to the utility system by a power regenerative DC/AC inverter that feedbacks the energy to the utility system with a unit power factor. Therefore, the proposed electric drive vehicle dynamic testing system not only achieves the dynamic test function, but saves energy.