what does "phase" mean?

sillyjnk

in many books, the word "phase" appears frequently. Is there anybody can tell what does "phase" mean exactly?

e.g: the power input to this power processor is usually from the electric utility at a line frequency of 60 or 50 HZ, single phase or three phases.


thank you so much

sillyjnk

i have fixed this problem out by myself.  

gwjwin

这里是“相”的意思吧，Three-phase 三相电

swallow8666

这里是“相”的意思吧，Three-phase 三相电
同意三楼的！
single phase 是单相

sillyjnk

thanks all of you

sookermouse

呵呵，我之前也不知道的。。。看了才知道。。。

sillyjnk

原帖由 sookermouse 于 2009-9-5 08:32 发表

                               
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呵呵，我之前也不知道的。。。看了才知道。。。

thank god, somebody as stupid as me!