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No load current of asynchronous motors

No load current of asynchronous motors

No load current of asynchronous motors

(OP)
What percentage of full load current is considered normal for no load conditions in squirrel cage induction motors?

RE: No load current of asynchronous motors

No load current magnitude varies from approx 20%-60%, with low speed motors generally being closer to 60% and 2-pole motors generally being closer to 20%.  

RE: No load current of asynchronous motors

Just to add a note to your response, Electricpete, the no-load current is mainly reactive.  There is not much difference between the no-load & the full load reactive current, which is the motor magnetizing current.

RE: No load current of asynchronous motors

OK, jbartos, I'll bite on this one.  
Your suggested links lead to -
a) - A manufacturer of small, special purpose DC motors
b) - The manual for a variable speed drive for elevator applications.

What, precisely, do these links have to do with the question in hand, which relates to the no-load current of squirrel cage induction motors?

Also, note that the power factor at no-load will tend to be be LOW, not high.

RE: No load current of asynchronous motors

jbartos -
On re-reading the above, it comes to me that what you meant was that for a no-load current of 20% or less, the full load power factor would be extremely high (around 0.98).  I agree with this, but still question the relevance of the links.

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