고압 유도전동기의 구동을 위한 소프트-스타터의 대용량 파워스텍 구현

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유두영;전희종;손진근
Ryu, Doo-young;Jeon, Hee-jong;Shon, Jin-geun

  • 투고 : 2016.03.24
  • 심사 : 2016.05.02
  • 발행 : 2016.06.01

초록

Soft starters are used with large induction motors in blowers, fans, pumps and the crane hoist drives. AC voltage controllers are used as soft starters in induction motors for starting and to adjust its speed. Soft-starter starting system uses phase control method of input electric source through the setting of the thyristor(SCR) firing angle ${\alpha}$, and it can control input electric source stably and continuously from beginning of starting to ending of starting. In this paper, it is verified that power stack of high-voltage with SCR series system possesses dielectric strength and input electric source is controlled stably by phase control. Especially, from the driving experimental of proposed soft-starter operating, a smoothing acceleration and inrush current decrease can be achieved by the series SCR trigger.

키워드

AC voltage controllers;Induction motor;Large scale power stack;Series SCR;Soft starters;Firing angle

참고문헌

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  7. G. Zenginobuz, I. Cadirci, M.Ermis, and C. Barlak, "Soft Starting of Large Induction Motors at Constant Current With Minimised Starting Torque Pulsations", IEEE Trans. Ind. Applicant. vol. 37, no.5, pp. 37-144, Sep./Oct. 2001.