Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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A Study on a Control Method for Small BLDC Motor Sensorless Drive with the Single Phase BEMF and the Neutral Point

소형 BLDC 전동기 센서리스 드라이브의 단상 역기전력과 중성점을 이용한 제어기법 연구

  • 조준우 (경남대학교 전기공학과) ;
  • 황돈하 (한국전기연구원 HVDC본부 전력기기연구센터) ;
  • 황영기 (한국산업기술평가관리원, 한국환경관리공단) ;
  • 정태욱 (경남대학교 전기공학과)
  • Received : 2014.03.28
  • Accepted : 2014.06.12
  • Published : 2014.09.30
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Abstract

Brushless Direct Current(BLDC) Motor is essential to measure a rotor position because of that this motor type needs to synchronize the rotor's position and changeover phase current instead of a brush and commutator used on the existing dc motor. Recently, many researches have studied on sensorless control drive for BLDC motor. The conventional control methods are a compensation value dq, Kalman filter, Fuzzy logic, Neurons neural network, and the like. These methods has difficulties of detecting BEMF accurately at low speed because of low BEMF voltage and switching noise. And also, the operation is long and complex. So, it is required a high-performance microprocessor. Therefore, it is not suitable for a small BLDC motor sensorless drive. This paper presents control methods suitable for economic small BLDC motor sensorless drive which are an improved design of the BEMF detection circuit, simplifying a complex algorithm and computation time reduction. The improved motor sensorless drive is verified stability and validity through being designed, manufactured and analyzed.

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References

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