루엔버거 관측기를 이용한 약계자 영역에서 유도전동기의 속도 센서리스 고정자자속 기준제어 = Speed Sensorless Stator Flux-Oriented Control of Induction Motor in the Field Weakening Region Using Luenberger Observer

다국어 초록 (Multilingual Abstract)

In a conventional speed sensorless stator flux-oriented(SFO) induction motor drive system, when the estimated speed is transformed into the sample-data model using the first-forward difference approximation, the sampled data model has a modeling error which, in turn, produces an error in the rotor speed estimation The error included in the estimated speed is removed by the use of a low pass filter (LPF), As the result, the delay of the estimated speed occurs m transients by the use of the LPF, This paper investigates the problem of a conventional speed sensorless SFO system due to the delay of estimated speed in the flied weakening region In addition, this paper proposes a method to estimate exactly speed by using Luenberger observer The proposed method IS verified by experiment with a 5-hp induction motor drive

목차 (Table of Contents)

• ABSTRACT
  
• 1.서론
  
• 2.기존의 속도 센서리스 방법
  
• 3.루엔버거 관측기에 의한 속도 추정
  
• 4.고정자자속 기준제어
  
• 5.실험 결과
  
• 6.결론
  
• 참고문헌