Highfrequency power measurement system based on LabVIEW

GUO Liang, WU Weilin
(School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

Abstract: A problem that highfrequency power cant be measured by ordinary power meter rose during the process of testing highfrequency power supply. Aiming at solving it, a method of measuring highfrequency power was proposed and the measurement error was estimated from theory. Whats more, based on LabVIEW platform and National Instruments high performance data acquisition instrument, a highfrequency power measurement system was designed, which integrated signal acquisition, realtime waveform display and data analysis and processing, and data stored in one. The system is able to work at different frequencies (below 40 kHz), different signal waveforms of power. And it was used to measure noload loss and load power of a highfrequency transformer working at about 20 kHz. The results indicate that the designed measurement system has good accuracy, to achieve the expected goal.
Key words: high frequency; power measurement; LabVIEW; transformer; noload loss