The study discusses a portable high-precision three-phase power measuring instrument,and analyzes key chip,circuit and principle.The device can mainly test parameters,such as three-phase AC voltage,AC current,AC frequency,AC power and AC phase,etc.The RMS-TO-DC converter LTC1968 is used to measure the true effective value,and the 16 bit A/D synchronous sampling converter LTC2324-16 is used to measure voltage and current.The multi cycle synchronous measurement method is used to measure frequency,which can achieve an accuracy of±0.02％for AC voltage and current measurement,±0.03 ° for phase measurement,and±1 × 10-7 for frequency measurement.The test accuracy reaches the requirement,and the expected goal is achieved.
关键词
三相功率/交直流转换/交流相位/交流电流
Key words
Three phase power/AC/DC conversion/Communication phase/Electronic technology
维普
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