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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  
Author(s)
R.Rajasri, DR.M.Arumugam
KEYWORDS
Brushless DC (BLDC) motor drives; position sensorless control; DTC Control; sliding mode observer; NSGA-II algorithm
ABSTRACT
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.
References
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[2] Ozturk, S.; Toliyat, H.A. "Sensorless direct torque and indirect flux control of brushless dc motor with non-sinusoidal back-EMF," IEEE InternationalIndustrial Electronics 2008, vol. 3: pp. 1373 -1378.

[3] Design and practical implementation of a back-EMF sliding-mode observer for a brushless dc motor. IET Journal on Electric Power Application 2008, vol. 2, no. 6, pp353-361.

[4] Lei Hao; Toliyat, H.A. "BLDC motor full-speed operation using hybrid sliding m o d e o b s e r v e r ," Eighteenth A n n u a l IEEE Applied Power ElectronicsConference and Exposition 2003, vol. 1, pp. 286-293.

[5] Yong Liu; Zi Qiang Zhu; Howe, D. "Instantaneous torque estimation in sensorless direct-torque-controlled brushless dc motors," IEEE Transactions on Industry Applications, vol. 42, no. 5, pp. 1275-1283.

[6] Chen. Z; Tomita, M.; Doki, S; Okuma, S. "New adaptive sliding observers for position- and velocity-sensorless controls of brushless dc motors," IEEE Transactions on Industrial Electronics 2000, vol. 47, no.3, pp. 582-591.

[7] Wilfrid Perruquetti, Jean Pierre Barbo. "Sliding mode control in engineering;" Marcel DekkerInc, 2002.

[8] Manual of NSGA-II optimization tools, Available at: http://www.mathworks.com/matlabcentral/fileexchange/10429.

[9] Toliyat HA, Gopalarathnam T. „‟AC machines controlled as DC machines (Brushless DC machines/electronics)‟‟ In: Skvarenina TL, editor.

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