The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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A Low-Cost Current-Sensing Scheme for MOSFET Motor Drives

MOSFET을 이용한 전동기 구동을 위한 저가격형 전류검출법

  • 장성동 (경상대 대학원 전기공학과) ;
  • 정재호 (경상대 대학원 전기공학과) ;
  • 박종규 (경상대 대학원 전기공학과) ;
  • 이균정 (경상대 대학원 전기공학과) ;
  • 신휘범 (경상대학교 전기전자공학부)
  • Published : 2003.02.01
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Abstract

A low-cost current-sensing scheme for the motor drives with MOSFET is described. Many motor drives usually employ the common current sensors to measure current for the purpose of control or protection. These current sensors, however, significantly burden the power circuit with the size and cost. The proposed current-sensing scheme utilizes information concerning MOSFET's On-voltage and On-resistance. An analogue circuit detecting On-voltage can overcome the above disadvantages because the circuit is small and is made at a low cost, and the fuzzy inference for On-resistance is also simply designed based on MOSFET's characteristics. The validity of this scheme will be experimentally verified by adopting the current control of a battery car.

Keywords

References

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