•
At any instant the net current on the neutral is zero. Try it!
在任何情况下,零线上的净电流为零。试试看!
•
Three phase motors have better starting torque, run more quietly, are more efficient and are
smaller than single—phase motors of similar hp rating
三相马达具有更好的起动扭矩、运行更平顺、更有效率,并且体积比相同马力的单相马达更小。
•
If you add more than three phases it adds more cost but doesn’t deliver significant performance
improvements
如果相数多余三个,会增加很多费用,但是性能并没有明显改善。
•
Three individual voltage phases typically
120 degrees out of phase of each other.
三个独立的电压相位彼此之间一般相差
120 度。
•
Three individual current phases typically
120 degrees out of phase of each other.
三个独立的电流相位彼此之间一般相差
120 度。
•
Voltage and current will typically be
shifted from each other resulting in
“power factor”
电压和电流的相位一般不一致,所以就有
了“功率因数”
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