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A Study on the Stable Sensorless Control of BLDC Motor Inside Auxiliary Air Compressor

  • Kim, In-Gun (Dept. of Electrical Engineering, Hanyang University) ;
  • Hong, Hyun-Seok (Dept. of Electrical Engineering, Hanyang University) ;
  • Go, Sung-Chul (Dept. of Mechatronics R&D Center. Mechatronics Group. Samsung Electronics Co., Ltd.) ;
  • Oh, Ye-Jun (Dept. of Electrical Engineering, Hanyang University) ;
  • Joo, Kyoung-Jin (Dept. of Electrical Engineering, Hanyang University) ;
  • Lee, Ju (Dept. of Electrical Engineering, Hanyang University)
  • Received : 2016.07.06
  • Accepted : 2016.09.28
  • Published : 2017.01.02

Abstract

Pantograph must be correctly attached to catenary to continuously supply stable power to railway vehicle, and the device used here is Auxiliary Air Compressor (ACM). The existing ACM used the DC motor that included commutator and brush. Since maintenance and repair by mechanical friction are essential for the DC motor, BLDC motor studies have been conducted to improve this. A three-phase BLDC motor does $120^{\circ}$ two-phase commutation through hall sensors in general. However, since hall sensor is vulnerable to heat and can run only when all three sensors work normally, sensorless control method has been studied to solve this. Using back EMF Zero Crossing Point (ZCP) detection method, this paper will introduce a stable switching sensing method that has a non-commutation area in a low speed zone.

Acknowledgement

Supported by : Korea Institute of Energy Technology Evaluation and Planning (KETEP), National Research Foundation of Korea (NRF)

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