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Ac Induction Amps


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I work in the Motor industry, but Im not an electrical guy, so if this seems overly simplistic, i apologize.

I have been asked the question, but I dont know how to answer.

A AC induction motor, fully loaded, but with lower than rated voltage applied to the terminals, will often run higher than Rated Amps.

The same motor fully loaded, with higher than rated voltage, will often run high amps if the core becomes Saturated.

However, the same motor, in either no load or locked rotor condition, the ratio between voltage and amps is proportional. That is, higher volts =higher amps, lower volts =lower amps.

Will someone explain this?

Why these volt/amps relationships?





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