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I have an application that require running an 55Kw high efficiency induction motor at rated torque at any rpm from 5% to 100% of the rated rpm. It will be controlled by a frequency inverter with FOC.This motor has independent cooling fan running with a separate motor that is capable of removing 5Kw heat from the motor. It will be controlled by an inverter with FOC. The motor is a good 95% efficient with cast copper rotor / not the regular cast aluminum. Can an induction motor give out full torque at 5% of its rated rpm with an inverter?? My concern is it may over heat at low frequency - not due to cooling fan because that is independent, but due to the other reasons.