Abstract
This paper presents particular methods for deployment of precision control of a sensorless permanent magnet brushless DC (PM BLDC) motor using PLL control algorithm. Firstly, we utilizes the third harmonic of the motor internal voltages to determine the commutation instants of the PM BLDC motor for sensorless control. The waveform of the motor internal voltages (or back emf) contains fundamental and higher-order frequency harmonics. Therefore, the third harmonic component is extracted from the stator phase voltage. The resulting third harmonic signal maintains a constant phase relationship with the rotor flux at any motor speed and load condition. And is practically free of noise that can be introduced by the inverter switching, making this a robust sensing method. As a result, the method described here is not sensitive to filtering delays, allowing the motor to achieve a good performance over a wide speed range. For conventional 6-pulse control using the Hall-IC alone, this sensor misalignment would pose problems such as excessive torque ripple, noise, and inefficiency. Therefore, to implement the third harmonic sensing methods and speed control algorithm in this paper, the principle of the Johnson counter is used and it can estimate the same Hall-ICs signal with a non-difference phase resulting from the signals of the Johnson counter. Also, to precise control of a sensorless PM BLDC motor, we applied the position signal of phase lock loop (PLL) control algorithm and the remainder scheme in this paper, thus one can operate PM BLDC motor in high performance. Also, a simple starting method and speed estimation approach are proposed. Simulation an experimental results are provided, to demonstrate the validity of the precision control of a sensorless PM BLDC motor using PLL control algorithm.
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References
Caricchi F, Giulii Capponi F, Crescimbini F, Solero L (2001) Sinusoidal brushless drive with low-cost hall effect position sensors. In: Proceedings of IEEE annual power electronics specialists conference PESC, pp 799–804
Su G-J, McKeever JW (2004) Low-cost sensorless control of brushless DC motors with improved speed range. IEEE Trans Power Electron 19:296–302
Real JCG, Gil JG (2015) Sensorless detection of position and speed in brushless DC motors using the derivative of terminal phase voltages technique with a simple and versatile motor driver implementation. J Electr Eng Technol 10:30–40
Chun T-W, Tran Q-V, Lee H-H, Kim H-G (2013) Sensorless control of BLDC motor drive for an automotive fuel pump using a hysteresis comparator. IEEE Trans Power Electron 29(3):1382–1391
Damodharan P, Vasudevan K (2010) Sensorless brushless DC motor drive based on the zero-crossing detection of back electromotive force (EMF) from the line voltage difference. IEEE Trans Energy Convers 25:661–668
Johnson JP, Ehsani M (1999) Review of sensorless methods for brushless DC. In: Proceedings of the IEEE industry application society annual meeting IAS’99, pp 143–150
Zeng L, Li Z (2011) Control system of sensorless brushless DC motor based on TMS320F240. I.J. Information Technology and Computer Science, pp 51–58, May 2011
Chen H-C, Liaw C-M (2002) Current-mode control for sensorless BDCM drive with intelligent commutation tuning. IEEE Trans Ind Appl 17:747–756
Moreiria JC (1996) Indirect sensing for rotor flux position of permanent magnet AC motors operating over a wide speed range. IEEE Trans Ind Appl 32:1394–1401
Pillay P, Krishnan R (1989) Modeling, simulation, and analysis of permanent-magnet motor drives, part II: the brushless DC motor drive. IEEE Trans Ind Appl 25(2):274–279
Amano Y, Tsuji T, Takahashi A, Ouchi S, Hamatsu K, Ijima M (2002) Sensorless drive system for brushless DC motors using a digital phase-locked loop. Electr Eng Jpn 142(1):57–66
Gamazo-Real JC, Vázquez-Sánchez E, Gómez-Gil J (2010) Position and speed control of brushless DC motors using sensorless techniques and application trends. Sensors 10(7):6901–6947
Damodharan P, Vasudevan K (2008) Line voltage based indirect back-emf zero crossing detection of bldc motor for sensorless operation. Int J Power Energy Syst 28(1):91–98
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This study was conducted by research funds from Gwangju University in 2017.
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Yoon, YH., Kim, JM. Precision control of a sensorless PM BLDC motor using PLL control algorithm. Electr Eng 100, 1097–1111 (2018). https://doi.org/10.1007/s00202-017-0571-x
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DOI: https://doi.org/10.1007/s00202-017-0571-x