The signal pre-processing system also has circuit to extract temperature signal via platinum thermistance, in which three-wire system and constant current measurement method are adopted.
信号预处理系统还包括温度信号提取电路，通过铂热敏电阻实现对温度信号的提取，采用了三线制恒流源测量法。
In the Three phase and Four wire circuit system, the neutral wire is very important.
在三相四线制供电系统中，中性线是非常重要的。
Firstly, this thesis has presented the system structure and operation principles of three-phase three-wire parallel APF.
本文首先给出了三相三线制并联型有源电力滤波器的系统构成以及工作原理。
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