How accurate is "efficient"?

Desertprep · Aug 29, 2010

i have noticed efficiency ratings of motors ranging from >80% (probably a cheap trash motor) to 94.7% (more likely an outrunner). What do these mean? How accurate are these ratings? Do they use the same process to determine the efficiency?

Miles · Aug 29, 2010

The efficiency figure given in specifications is the maximum value. This is for the torque output achievable at the point where the copper losses are at parity with the parasitic losses. It's accurately measurable, or calculable - whether the figure given is truthful, or not, is another matter....

Desertprep · Aug 29, 2010

Wow...and I thought Chinese was a difficult language :lol:

Don't they have antibiotics for parasites? :roll:

Miles · Aug 30, 2010

Did you understand, though?

Desertprep · Aug 30, 2010

Yes :wink:

How accurate is "efficient"?

Desertprep

1 kW

Miles

100 TW

Desertprep

1 kW

Miles

100 TW

Desertprep

1 kW

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