Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 34, Issue 9, Pages 8787-8796Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2018.2885031
Keywords
Brushless direct current (BLDC) motor; commutation error compensation; high precision; high-speed motor; sensorless drive
Categories
Funding
- National Key Research and Development Program of China [2016YFB0500804]
- Chinese Postdoctoral Science Foundation [2017M620579, 2018T110031]
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For brushless direct current (BLDC) motor applications, one of the most concerning points in the drive system is the commutation error, which will deteriorate the whole system performance, especially in a high-speed range. Unfortunately, the commutation error is hard to be unitedly eliminated since many non-ideal factors will impact the precision of commutations. To remedy this problem and improve the sensorless drive performance, a novel sensorless control and compensation scheme based on virtual third-harmonic back electromotive force (EMF) combining BEPF-SFE (back EMFpower factor combining synchronic-frequency extractor) has been developed. In the proposed method, the virtual third-harmonic back EMF based method is applied to a sensorless drive high-speed magnetically suspended BLDC motor. At the same time, the commutation error is actively compensated by BEPF-SFE-based compensation. An experimental high-speed blower setup is built for evaluating the developed high-speed-BLDC motor performance. The effectiveness of the proposed algorithm is validated both through mathematical analysis and experimental results.
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