Novel reverse regeneration technique of BLDC motor for capacitor charging

This paper illustrates the working of a BLDC motor in the forward motoring and reverse regeneration mode. It proposes a simple method of braking with energy regeneration for a brushless dc motor. This action is accomplished through the inversion of the signals given by the position sensor. During motor operation, the rotor moves clockwise. When the brake signal is applied, the stator field is reversed 180 electric degrees compared with the presented method. The proposed solution simultaneously achieves dual goals - electric brake and the energy regeneration without using additional converter, ultra-capacitor, or complex winding-changeover technique. Since by braking kinetic energy is converted into the electrical energy and then this energy is stored in the battery. Charging of the battery has been understood by looking into the charging current and voltage waveform of the capacitor connected in parallel to the battery. The speed control model of the BLDC motor is built and simulated in this paper. Power electronic components such as inverter, motor have been used and analysis of the different parameters like speed, torque, phase currents, hall sensors output etc. has been discussed during various modes of operation. This model has been built using PSIM (power simulator) software and the Mathworks tool called the Simpower systems. The parts of the Inverter, BLDC motor have been modeled in PSIM whereas controller model has been done using the Simpower systems. The motor model built in PSIM systems is then tied into the MATLAB model with the help of a SIMCOUPLER tool.