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Chapter: Solid State Drives : Induction Motor Drives

Constant air gap flux control

Equivalent separately-excited dc motor in terms of its speed but not in terms of decoupling of flux and torque channel.

Constant air gap flux control:

 

1.                 Equivalent separately-excited dc motor in terms of its speed but not in terms of decoupling of flux and torque channel.

 

2.                 Constant air gar flux linkages

 

 

ƛm= Lmim=E1s

 


 

The rotor flux magnitude and position is key information for the AC induction motor control. With the rotor magnetic flux, the rotational coordinate system (d-q) can be established. There are several methods for obtaining the rotor magnetic flux. The implemented flux model utilizes monitored rotor speed and stator voltages and currents. It is calculated in the stationary reference frame (α,β) attached to the stator. The error in the calculated value of the rotor flux, influenced by the changes in temperature, is negligible for this rotor flux model

 

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Solid State Drives : Induction Motor Drives : Constant air gap flux control |


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