Cherukuri N.N. Rao* | Gadwala D. Sukumar
OPEN ACCESS
Low torque ripples are needed by the industrial loads. Torque ripples are produced in motor due to the commutation. The motor input current thus distorting from the ideal current waveform shape due to the motor inductance. So in one particular interval one phase current is decaying slowly and another phase current is increasing slowly. Due to this, the commutation ripples exists in the torque. Because of the brushless dc motor input supply current commutate at every 60 degrees interval, the magnetic field wave developing and revolving unequally. At every 60 degree the rotor position is observed, so the torque is not constant, ripples are existing in the torque curve which is undesirable. Hysteresis current controller and PWM control simulation models are given to reduce this type of torque ripples. The torque ripple reduction due to Hysteresis and PWM control methods are presented.
MATLAB/Simulink model, modelling of BLDCM, torque ripple, hysteresis, PWM
[1] Xia K, Lu J, Bi C, Tan Y, Dong B. (2016). Dynamic commutation torque-ripple reduction for brushless DC motor based on quasi-Z source net. IET Electric Power Application Research Article 10(9): 819-825. https://doi.org/10.1049/iet-epa.2016.0219
[2] Srinivasarao G, Rakada VB, Attuluri, Siva NRS. (2018). Design and development of an affordable plug in/solar assisted electric auto rickshaw. Modelling, Measurement and Control A 91(2): 41-47. https://doi.org/10.18280/mmc_a.910202
[3] Jiang WD, Huang H, Wang JP, Gao Y, Wang L. (2017). Commutation analysis of brushless DC motor and reducing commutation torque ripple in the two-phase stationary frame. IEEE Transactions on Power Electronics 32(6): 4675–4682. https://doi.org/10.1109/TPEL.2016.2604422
[4] Xu YX, Wei YY, Wang BC, Zou JB. (2016). A novel inverter topology for brushless DC motor drive to shorten commutation time. IIEEE Transactions on Industrial Electronics 63(2): 796–807. https://doi.org/10.1109/TIE.2015.2480759
[5] An-Chen Lee, Samuel Wang, Chia-Juei Fan. (2016). A current index approach to compensate commutation phase error for sensorless brushless dc motors with non ideal back EMF. IEEE Transactions on Power Electronics 31(6): 4389–4399. https://doi.org/10.1109/TPEL.2015.2468081
[6] Xia CL, Wu D, Shi TN, Chen W. (2017). A current control scheme of brushless dc motors driven by four-switch three phase inverters. IEEE Journal of Emerging and Selected Topics in Power Electronics 5(1): 547–558. https://doi.org/10.1109/JESTPE.2016.2637383