Modeling of SEPIC Fed PMBLDC Motor for Torque Ripple Minimization

  • N. Lakshmipriya Jay Shriram Group of Institution, Tirupur
  • S. Manivel Jay Shriram Group of Institution, Tirupur
  • N. Sadeesh Jay Shriram Group of Institution, Tirupur


BLDC Motor suffers from commutation torque ripple, which mainly depends on stator winding impedance, speed and transient line current in the conduction interval. This paper describes a novel circuit topology and a dc input link voltage control strategy to keep incoming and outgoing phase currents changing at the same rate during commutation interval. A SEPIC (single-ended primary inductor converter) and a switch selection circuit are employed in the front of the inverter. The desired commutation voltage is obtained by the SEPIC converter. The input dc link voltage control strategy is carried out by the switch selection circuit to separate two procedures, adjusting the SEPIC converter and regulating speed. The commutation torque ripple is analyzed, and introduced the way to obtain the desired dc link voltage in detail. Finally, simulation and experimental results show that, compared with conventional and the proposed method can obtain the desired voltage is obtained and minimize commutation torque ripple more efficiently.


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Author Biographies

N. Lakshmipriya, Jay Shriram Group of Institution, Tirupur
Assistant ProfessorDepartment of EEE
S. Manivel, Jay Shriram Group of Institution, Tirupur
Assistant ProfessorDepartment of EEE
N. Sadeesh, Jay Shriram Group of Institution, Tirupur
Assistant ProfessorDepartment of EEE


[1] Y.-C. Son, K.-Y. Jang, and B.-S. Suh, “Integrated MOSFET inverter module of low-power drive system,” IEEE Trans. Ind. Appl., vol. 44, no. 3, pp. 878–886, May/Jun. 2008.
[2] A. Sathyan, N. Milivojevic, Y.-J. Lee, M. Krishnamurthy, and A. Emadi, “An FPGA-based novel digital PWM control scheme for BLDC motor drives,” IEEE Trans. Ind. Electron., vol. 56, no. 8, pp. 3040–3049,Aug. 2009.
[3] Anandsathyan, (2009)“A Alaincassat, (2009) “New Torque Control Method for Torque Ripple Minimization of BLDC Motors with Un-Ideal Back EMF,’’ IEEE Transaction Industrial Electronics., vol. 37, no.4, pp. 8/1–8/4.
[4] New Approach for Minimum-Torque-Ripple Maximum-Efficiency Control of BLDC Motor,” IEEE Transaction Industrial Electron., vol. 48, no. 6, pp. 1065–1073,
[5] Cheng Tsung Lin, (2005) “Presented Direct Torque and Indirect Flux Control of Brushless DC Motor’’, vol. 18, no. 6, pp. 1365–1375, Nov. 2005.
[6] Damodhan, (2010) “A Current Control Scheme with an Adaptive Internal Model for Torque Ripple Minimization and Robust Current Regulation,” IEEE Power Application, vol. 152, no. 2, pp. 277–291.
[7] Doo-Hec Jung,(2012) “Torque Ripple Minimization in PM Synchronous Motors Using Iterative Learning Control,” IEEE Transaction Power Electronics., vol. 22, no. 2, pp. 644–653
[8] Haifeng Lu, (2004) “BLDC Motor Stator and Rotor Iron Losses and Thermal Behavior Based on Lumped Schemes and 3-D FEM Analysis,” IEEE Transaction. Power Electronics, vol. 15, no. 4, pp. 744–752.
[9] Hung-Chichen, (2010) “FPGA-Based Novel Digital PWM Control Scheme for BLDC Motor Drives,” IEEE Transaction Industrial Electronics, vol. 53, no. 2, pp. 352–362.
[10] Jian wen show, (2010) “Commutation-Torque-Ripple Minimization in Direct-Torque-Controlled PM Brushless DC Drives,” IEEE Transaction Industrial. Application, vol. IA-21, no. 4, pp. 595–601.
[11] Karthikeyan, (2010) “Operating Torque Estimation of High-Speed slot less Brushless DC Machine Considering Power Loss,” IEEE Transaction Power Electronics., vol. 19, no. 6, pp. 1635–1645.
How to Cite
LAKSHMIPRIYA, N.; MANIVEL, S.; SADEESH, N.. Modeling of SEPIC Fed PMBLDC Motor for Torque Ripple Minimization. International Journal of Research and Engineering, [S.l.], v. 2, n. 1, p. 10-16, jan. 2015. ISSN 2348-7860. Available at: <>. Date accessed: 30 sep. 2020.


Brushless DC Motor, Torque ripple, SEPIC Converter