• T.V.Subbarao
• A.Madhusudanarao
• B.Ramakrishna singh

The main purpose of this paper is to develop low cost four-switch brushless dc (BLDC) motor drives for practical industrial applications. Permanent Magnet Brushless DC (PMBLDC) machines are more popular due to its simple structure and low cost. Cost reduction in BLDC motor drives can be achieved by two methods, one is topological approach and second is control approach. In the topological approach, the number of switches, sensors and associated circuitry is minimized. Normally for the BLDC Motor drive six switches inverter topology is used. By reducing the no of switches the cost reduction can be achieved. Moreover switching and conduction losses can be reduced. The simulation of sensor less control of drive is done in Matlab/Simulink. Control with sensor, the controller is used Fuzzy logic Controller and in sensor less control the method is used terminal voltage sensing.

BLDC Motor, VSI Topology,Sensorless Control

"SENSORLESS CONTROL OF FOUR SWITCH INVERTER PERMANENT MAGNET BRUSHLESS DC MOTOR", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 7, page no.1102-1107, July-2018, Available :http://www.jetir.org/papers/JETIRC006189.pdf

"SENSORLESS CONTROL OF FOUR SWITCH INVERTER PERMANENT MAGNET BRUSHLESS DC MOTOR", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 7, page no. pp1102-1107, July-2018, Available at : http://www.jetir.org/papers/JETIRC006189.pdf