The Research of Traction Motor Energy-Saving Regenerative Braking Control Technology

In all the motor braking control systems, regenerative braking is the only way of energy-saving braking control mode. It can convert dynamic energy which generate during braking period into electric energy, then return to the grid. In this paper, through analysis of regenerative braking principle of traction motor, and combining with direct torque control (DTC) technique, proposed a regenerative braking control system based on DTC. The system will achieve a better braking effect by changing amplitude of stator flux and slip frequency. The use of direct torque control method effectively controls the error of flux phase position, so that feedback current harmonic is small, running smoothly, it is standard sine wave.