Design and Implementation of Modified Buck Boost Converter Fed B4 Inverter for Brushless Dc motor Drive using Low Cost DSPIC Controller Shanmugam S. Sathish Kumar*, Dr. Kumari R. Meena** *Assistant Professor, Department of EEE, Jansons Institute of Technology, Coimbatore, Tamilnadu, India **Professor, Department of EEE, Kongu Engineering College, Erode, Tamilnadu, India Online published on 14 October, 2016. Abstract The Research deals with the speed control of Brushless DC Motor drive by low cost dsPIC controller and B4 Inverter with new converter design (Four Switch Inverter) rather than conventional inverter (Six Switch Inverter) is proposed. The conventional Six switch Inverter is modified into B4 Inverter in order to reduce the switch leg failure, and Total Harmonic Distortion. This facilitates the operation of voltage source Inverter at fundamental frequency switching by using the Electronic commutation technique rather than Mechanical commutation. In addition we propose single phase Rectifier and Three phase voltage source Inverter, dsPIC controller to generate the multiple carrier PWM pulses for B4 Inverter which is fed to the Permanent Magnet Brushless DC Motor to obtain the desired motor speed. The proposed Research mainly focused on the new topology of Buck boost converter design for B4 inverter, By this new modified buck boost Enhancement converter design motor speed are controlled and voltage imbalance in the capacitors are avoided the capacitor voltage is similar voltage level is obtained during the buck and the boost mode operation of the converter side, So results with improved quality of Boosted up output DC Power is obtained. Simulation Modeling Results are carried out by Matlab/Simulink environment and Portable Experimental Hardware is developed Results are carried out Sucessfully and Validated for various operating parameter conditions. Top Keywords B4 Inverter, dsPIC Controller, Buck Boost converter, Permanent Magnet Brushless dc Motor, Multiplecarrier PWM Pulses, Simulation. Top |