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International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 5    
Website: http://www.ijser.org
scirp IJSER >> Volume 3,Issue 5,May 2012
New Control Algorithm for Brushless Dc motor Drive
Full Text(PDF, )  PP.922-927  
R.Rajasri, DR.M.Arumugam
Brushless DC (BLDC) motor drives; position sensorless control; DTC Control; sliding mode observer; NSGA-II algorithm
This paper presents a direct torque control technique for three phase BLDC motor using four switches with non-sinusoidal back-emf, which is estimated using sliding mode observer. Cost of BLDC driver is reduced due to reduction of switch device and saving of hall and current sensors. The working process of the BLDC motor is divided into six modes. The proposed scheme is based on the detection of zero crossing points of three voltage function that are derived from the difference of line voltages measured at the terminal of the motor, only one current controller is used. Non-sinusoidal back-emf is estimated using sliding mode observer and generates the torque. NSGA-II algorithm is used as an effective optimization tool for regulating the PID controller parameters of speed controller.
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[8] Manual of NSGA-II optimization tools, Available at: http://www.mathworks.com/matlabcentral/fileexchange/10429.

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