Recent content by makkena

  1. M

    Frequency - Temperature characteristics of transformer winding

    Dear Sir, The rating of a single phase transformer is 230V / 230V (1:1), 5A, 50 hz, 1200W. When this transformer is operated at 230V, 5A, and 50 hz the transformer winding saturated temperature may be some value. Now when the same transformer is operated at 230V, 5A and 40 hz (reduced...
  2. M

    Operating principle of a Six Phase induction motor

    Thanks for the reply sir. Yes sir, I am familiar with how the rotating magnetic filed is produced in 3 phase induction motor. It creates a rotating filed of constant magnitude 1.5 times the maximum value of flux and rotates at synchronous speed. But in case of 6 phase induction machine...
  3. M

    Operating principle of a Six Phase induction motor

    Hi Sir, I have seen in many IEEE magazines that, a six phase induction motor is having two 3 phase windings spatially separated by an angle of 30 degrees electrical. I have attached the 6 phase induction motor diagram. But I am not able to understand how the motor operates i.e. how the rotor...
  4. M

    V/f speed control of 3 phase Induction motors

    When the voltage / frequency is maintained constant in 3 phase Induction motor i.e. flux is maintained constant by changing the voltage and frequency in same proportion, What is the torque proportionality equation. Whether Torque is proportional to Slip X Frequency or Torque is...
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