Recent content by earth_physics

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    AC induction motor reverse 3 phase

    Ok thanks. is this called plugging? Because if it is then it is not regenerative. When you plugging you draw big current from the supply to stop to ac motor.
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    AC induction motor reverse 3 phase

    [FONT="Verdana"]What happens if an big AC induction motor is running with full load an your suddenly reverse the 3 phase?
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    AC induction motor - V/f control

    Okay. if the this happens in 1 sec or less etc. Does the motor still draw a big current? How about if this happens while the motor is running does it still draw a big current because now the motor produce CEMF? the inductance value does not only change by stator frequency.
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    AC induction motor - V/f control

    Okay thanks. Let say the rotor frequency is 60Hz and the stator frequency suddenly become 2 Hz or 0 Hz(DC) in 1-2 sec the motor will generate a lot current? Lets say your AC motor accelerate from stand still and your voltage and frequency is controlled properly, but suddenly the frequency...
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    AC induction motor - V/f control

    What will happen if an ac inductions motor is running, an suddenly an error occurs in the voltage pr. hertz motor control so the stator frequency goes down below the rotor frequency for 1-2 sec?