Motor efficiency
Motor efficiency
(OP)
What is the reason for efficiency of IE3 motors to be greater than IE2 motors?
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RE: Motor efficiency
Seriously though, are you asking for the differences in the standard or are you asking how the manufacturers attain the higher efficiency?
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RE: Motor efficiency
The old standard EN 60034-2:1996 was two: EFF2 standard efficiency and EFF1 high efficiency.
IEC 60034-30:2009 states new symbols for EFF1 and EFF2 as you could see in the following article:
http://www.machinebuilding.net/p/p3045.htm
EFF2 standard efficiency>>> IE1
EFF1 high efficiency becomes IE2
IE3 is a new classification for premium efficiency
The reason is the reduced energy consume [2-8% less than standard in IE3-premium efficiency].This is the new international
policy in order to reduce pollution and earth heating produced by power plants[Global Warming Policy].
The same policy which requires high lighting efficiency bulb and so on.