Research on an energy feedback power dynamometer based on improved vector control

An improved vector control scheme for an energy feedback power dynamometer is proposed in this paper. The power dynamometer can be operated in both motoring and generating states. In generating mode the dynamometer can feedback the energy with unit power factor. In order to improve the dynamic response, improved vector control scheme is introduced. The torque control method is adopted in the outer-loop of the control system, while the Fuzzy-PI and decoupling compensation controller is used to replace the traditional PI controller in the inner-loop. MATLAB-based Simulation studies of two 15-kW induction motors system are carried out. Simulation results show the improvement of the torque response, decrease of the torque ripple and the higher steady performance.