IDT 90E36三相电能表设计方案
IDT公司的IDT90E32/36三相电能计量芯片,集成了7个单独的2阶sigma-delta ADC,可实现三相四线系统中的三个电压通路(A,B和C相)和四个电流通路(A,B,C相和中线),和标准IEC62052-11, IEC62053-22 and IEC62053-23, ANSI C12.1与ANSI C12.20兼容,动态范围6000:1时的有功功率精度±0.1%,无功功率精度±0.2%,片内的基准电压温度系数6 ppm/ ℃,主要用于0.5S 级或1级三相四线(Y0)和三相三线(Y或Δ)电表,数据采集终端,电源监视仪表等.本文介绍了90E36主要特性,方框图以及三相四线电流互感器(CT)电表电路图和材料清单, 三相四线Rogowski线圈电表电路图和材料清单, 三相三线电表电路图和材料清单.
The 90E36 is a poly-phase high performance wide-dynamic range metering IC. The 90E36 incorporates 7 independent 2nd order sigma-delta ADCs, which could be employed in three voltage channels (phase A, B and C) and four current channels (phase A, B, C and neutral line) in a typical three-phase four-wire system.
The 90E36 has an embedded DSP which executes calculation of active energy, reactive energy, apparent energy, fundamental and harmonic active energy over ADC signal and on-chip reference voltage.
The DSP also calculates measurement parameters such as voltage and current RMS value as well as mean active/reactive/apparent power.
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