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satishhar
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Join Date: Mar 2011
Location: Karnataka, India
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Current Inductor Motor Relationships

07/20/2012 1:42 AM

What is the relation between frequency and current in an induction motor?

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Epke
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#1

Re: Electrical

07/20/2012 2:09 AM

http://www2.nkfust.edu.tw/~tuky/servo/PDF/Ch7.pdf

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JRaef
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#2

Re: Current Inductor Motor Relationships

07/20/2012 5:47 PM

Only one valid answer to this as posed.

At zero frequency and at rated voltage, the induction motor stops and because the winding resistance is low, the current goes very high, so the winding insulation eventually catches on fire and sooner or later the windings melt, hopefully in such a way so that the curcuit is broken so the DC current ceases to flow.

At all other frequencies, it depends on other unstated factors so no further answer is possible.

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leveles
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#3

Re: Current Inductor Motor Relationships

07/20/2012 11:15 PM

What is the problem in calculating or estimating the coil's impedance for the imaginary part, and power output plus efficiency for the real part?
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