关于异步电机功率因数测量相关问题的解析  

Analysis on Related Measurement Problems of Power Factor of Induction Motor

作　　者：王磊 Wang Lei(Navy Agent＇s Room Stationed in Harbin Region, Harbin 150040, China)

机构地区：[1]海军驻哈尔滨地配代表室,黑龙江哈尔滨150040

出　　处：《防爆电机》2018年第3期43-44,47,共3页Explosion-proof Electric Machine

摘　　要：为了表征电路交流电源的利用率,在电工学中引入了"功率因数"这个术语。影响功率因数测量精度的因素有三个:第一是系统AC线路输入电流与输入电压之间的相位偏移,第二是波形的失真程度,第三是测量线路的布设。尤其在用数字化电源供电的变频电机的试验过程中,上述三个因素对变频电机功率因数测量的影响尤为突出,本文就出现的相关问题作出较为详尽的解析。In order to represent the utilization rate of AC power supply of characterization circuit,the term of ＂ power factor＂ is introduced in electrotechnics. Three factors affect the measurement precision of power factor： the first is the phase shift of system AC line circuit between input current and input voltage,the second is the distortion degree of waveform,and the third is the layout of measuring line. In the test process of variable-frequency motor fed by digital power supply,the influence of above three factors on the measurement of power factor is especially significant. This paper gives a more detailed analysis on the related problems.

关 键 词：异步电动机 功率因数 数字化电源 谐波电流 无功功率 

分 类 号：TM357[电气工程—电机]