열전형변환기를 사용한 정밀 교류직류전력측정장치 개발

Development of the precision AC/DC power measuring system on the basis of thermal converters

  • 박영태 (한국표준과학연구원 전자기연구부) ;
  • 장석명 (충남대 공대 전기공학과)
  • 발행 : 1996.01.01

초록

The high precision of electrical power and energy measurements with wide range of frequency and power factor can be achieved by using the thermo-electrical power comparators. The paper describes the development of a precision power measuring system by using a ac/dc power comparator for measurement of power. Based on a thermal principle, the instrument performs ac-dc transfer for ac power measurements in the range of currents from 0 to 5 $A_{ms}$ , voltages from 0 to 240 $V_{ms}$ , power factors from 0 to 1 and frequencies from 0 to 1000 Hz. Two thermal converters with two heater are used in the functional element of the comparators. The ac-dc transfer accuracy is better than 20 ppm at unity power factor and better than 50 ppm at 0.5 power factor. (author). 8 refs., 5 figs., 3 tabs.

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