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flux control for detecting heat points on wind turbine rotor

flux control for detecting heat points on wind turbine rotor

flux control for detecting heat points on wind turbine rotor

(OP)
Hi
I try to cheek heat points on a double feed rotor from a wind turbine generator, this is a rotor to feed with 1800 V with a VFD with a 5 khz PWM control of the output so ripple will be on 5 khz on the voltage.... i have dismounted it, so i introduce 30 turns with 120 A on the magnetic circuit, this means....the rotor have some air passages on the magnetic core so i pass the wires and border rotor on its outside surface....and i checked that no heating up of the rotor... so i wonder if this magnetic core is special or something like that....

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