In 3 phase induction motor even with low Voltage it reaches
nearly it's rated speed why? (for example instead of 400V it
reaches with 250V)
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Answer Posted / kj
With an induction motor the speed is dependant on the
frequency and is the same as the frequency minus slip. For
a 4 pole motor this is about 1440 to 1460 RPM.
It does not depend on the voltage. The torque is dependant
on the voltage.
A 400 volt motor supplied at 250 volts would not have
anywhere the power output.
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