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Chapter: Solid State Drives : Induction Motor Drives

Closed-loop control of induction motor

Closed-loop induction motor drive with constant volts/Hz control strategy

Closed-loop control of induction motor

 


Closed-loop induction motor drive with constant volts/Hz control strategy

 

An outer speed PI control loop in the induction motor drive, shown in Figure computes the frequency and voltage set points for the inverter and the converter respectively. The limiter ensures that the slip-speed command is within the maximum allowable slip speed of the induction motor. The slip-speed command is added to electrical rotor speed to obtain the stator frequency command. Thereafter, the stator frequency command is processed in an open-loop drive. Kdc is the constant of proportionality between the dc load voltage and the stator frequency.

 

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