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Implementation of the BLDC Motor Drive System using PFC converter and DTC  

Yang, Oh (School of Electronics and Information Engineering, Cheongju University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SC / v.44, no.5, 2007 , pp. 62-70 More about this Journal
Abstract
In this paper, the boost Power Factor Correction(PFC) technique for Direct Torque Control(DTC) of brushless DC motor drive in the constant torque region is implemented on a TMS320F2812DSP. Unlike conventional six-step PWM current control, by properly selecting the inverter voltage space vectors of the two-phase conduction mode from a simple look-up table at a predefined sampling time, the desired quasi-square wave current is obtained, therefore a much faster torque response is achieved compared to conventional current control. Furthermore, to eliminate the low-frequency torque oscillations caused by the non-ideal trapezoidal shape of the actual back-EMF waveform of the BLDC motor, a pre-stored back-EMF versus position look-up table is designed. The duty cycle of the boost converter is determined by a control algorithm based on the input voltage, output voltage which is the dc-link of the BLDC motor drive, and inductor current using average current control method with input voltage feed-forward compensation during each sampling period of the drive system. With the emergence of high-speed digital signal processors(DSPs), both PFC and simple DTC algorithms can be executed during a single sampling period of the BLDC motor drive. In the proposed method, since no PWM algorithm is required for DTC or BLDC motor drive, only one PWM output for the boost converter with 80 kHz switching frequency is used in a TMS320F2812 DSP. The validity and effectiveness of the proposed DTC of BLDC motor drive scheme with PFC are verified through the experimental results. The test results verify that the proposed PFC for DTC of BLDC motor drive improves power factor considerably from 0.77 to as close as 0.9997 with and without load conditions.
Keywords
Direct torque control; BLDC motor drive; non-sinusoidal back-EMF; power factor correction(PFC);
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1 P. Pillay and R. Krishnan, 'Application characteristics of permanent magnet synchronous and brushless DC motors for servo drives,' IEEE Trans. Ind. Appl., vol. 27, no. 5, pp. 986-996, Sep./Oct. 1991   DOI   ScienceOn
2 R. Redl and B. P. Erisman, 'Reducing distortion in peak-current-controlled boost power-factor correctors,' in Proc. IEEE-APEC Annu. Meeting, Orlando, FL, vol. 2, pp. 576–583, Feb. 13-17, 1994
3 L. Hao, H.A. Toliyat, 'BLDC motor full-speed operation using hybrid sliding mode observer,' in Proc. IEEE-APEC Annu. Meeting, Miami, FL, vol. 1, pp. 286-293, Feb. 9-13, 2003
4 M. Fu and Q. Chen, 'A DSP based controller for power factor correction in a rectifier circuit,' in Proc. IEEE-APEC Annu. Meeting, Anaheim, CA, pp. 144-149, Mar. 4-8, 2001
5 R. Zane and D. Maksimovic, 'Nonlinear-carrier control for high-power factor rectifiers based on up-down switching converters,' IEEE Trans. Power Electron., vol. 13, no.2, pp. 213–221, Mar. 1998
6 M. Ehsani, R.C. Becerra, 'High-speed torque control of brushless permanent magnet motors,' IEEE Trans. Ind. Electron., vol. 35, no. 3, pp. 402-406, Aug. 1988   DOI   ScienceOn
7 J. Spangler and A. Behera, 'A comparison between hysteretic and fixed frequency boost converters used for power factor correction,' in Proc. IEEE-APEC Annu. Meeting, San Diego, CA, pp. 281–286, Mar. 7-11, 1993
8 J. Zhou et al., 'Novel sampling algorithm for DSP controlled 2 kW PFC converter,' IEEE Trans. Power Electron., vol. 16, no.2, pp. 217-222, Mar. 2001   DOI   ScienceOn
9 S. Choudhury, 'Average current mode controlled power factor correction converter Using TMS320LF2407A,' Texas Instruments Application Note SPRA902A, pp. 1-14, Jul. 2005
10 D. Grenier, L. A. Dessaint, O. Akhrif, J. P. Louis, 'A park-like transformation for the study and the control of a nonsinusoidal brushless DC motor,' in Proc. IEEE-IECON Annu. Meeting, Orlando, FL, vol. 2, pp. 836-843, Nov. 6-10, 1995
11 S. Buso et al., 'Simple digital control improving dynamic performance of power factor pre-regulators,' IEEE Trans. Power Electron., vol. 13, no.5, pp. 814–823, Sept. 1998
12 W. Zhang, G. Feng, Y.-F. Liu, and B. Wu, 'A digital power factor correction (PFC) control strategy optimized for DSP,' IEEE Trans. Power Electron., vol. 19, no. 6, pp. 1474-1485, Nov. 2004   DOI   ScienceOn
13 P. C. Todd, 'UC3854 controlled power factor correction circuit design,' U-134, Unitrode Application Note, pp. 3-269-3-288
14 Y. Liu, Z.Q. Zhu, and D. Howe, 'Direct torque control of brushless DC drives with reduced torque ripple,' IEEE Trans. Ind. Appl., vol. 41, no. 2, pp. 599-608, Mar./Apr. 2005   DOI   ScienceOn