Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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A study about rotor position estimation enhance using IQ math in DSP

DSP 내의 IQ math를 이용한 회전자 위치 추정 정밀도 향상에 관한 연구

  • Jang, Joong-Hack (Department of Information & Control Engineering, Servo machine and control Lab., Hose University) ;
  • Lee, Kwang-Ho (Department of Information & Control Engineering, Servo machine and control Lab., Hose University) ;
  • Hong, Sun-Ki (Department of Information & Control Engineering, Servo machine and control Lab., Hose University)
  • 장중학 (호서 대학교 정보제어공학과 서보기기 및 제어연구실) ;
  • 이광호 (호서 대학교 정보제어공학과 서보기기 및 제어연구실) ;
  • 홍선기 (호서 대학교 정보제어공학과 서보기기 및 제어연구실)
  • Published : 2005.10.20
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Abstract

DSPs used at motor control are usually fixed point processor. They need scaling because they cannot excute floating point calculation. Scaling for floating point calculation makes the DSP's speed down, complex coding and etc. Therefore the IQ math is adopted. IQ math makes the fixed point processor possible to calculate the floating point math. In addition, IQ math can reduce memory usage and be more faster than that without IQ math. It seems that IQ math is appropriate in motor position control. In comparison of the position calculation between the IQ math, math function and the sine table, the method using IQ math is superior than other methods.

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