Flc Based Battery Energy Management System in Hybrid Cascaded Multilevel Converter Applied in Electric Vehicles

Now a day the electrical energy utilization is increasing day by day like in industries, home appliances, and in electric vehicles. In electric vehicles the electrical energy is required to drive the motor drives. The electrical energy is given to electric drives through batteries like lead-acid, lithium, etc. Batteries are connected in series to provide energy cause circuit damage, voltage imbalance and less utilization of energy. This is because of different chemical characteristics and state of charge (SOC) of batteries. To avoid these disadvantages we are using Hybrid Cascaded multilevel converter. In this converter we have a half bridge arm and a H-Bridge. Half bridge arms are including the batteries into the circuit or bypass the batteries from the circuit. Half bridges are produce stair case dc output voltages from batteries and HBridge is used to convert dc voltages to AC output voltages. The output voltage is multilevel voltage which has less harmonics and lower dv/dt. To smoothen the output voltages and currents the pulse width modulation technique used is space vector pulse width modulation technique. And the current control technique is fuzzy logic control technique both provide lesser total harmonic distortions. By these techniques the utilization of battery energy is increased, voltage balance and faulttolerance also improved. The simulation is done in MATLAB and experimental results are observed to know the performance of the converter.