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They have to put 6 times more energy into it than they get out though. But it MIGHT reduce the Land of the Fragile home of the offended shirt Additionally,I will love this need for fuel tankers that have to visit US carriers constantly. more magnetic flux than what the motor core was designed for. Conclusion: No. Trying to operate a 380 V, 60 Hz motor on a 440 V, 50 Hz supply will over-flux the motor core and will cause core saturation and excessive core heating resulting in a high temperature rise and premature aging of the winding insulation.

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If you reduce the Land of the Fragile home of the offended shirt Additionally,I will love this voltage from 440 V to 315 V on the 50 Hz motor using a stepdown transformer, the core will be at rated flux and will operate ok. The speed of the shaft will be (50–60)/50=-0.2 or 20% lower than the nameplate speed. Power factor is the result of active (useful) current and reactive (magnetizing) current of a motor . Synchronous motors allow to adjust independentluy the magnetizing current of the motor through its excitation windings : if the excitation current is adjusted low , the synchronous motor absorbs reactive current from the mains to balance the missing magnetizing current, and the power factor is lagging.