A5. A 380 V, 4-pole, 1250 rev/min, 50 Hz three-phase induction motor is controlled by a Variable Voltage Variable Freque

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A5. A 380 V, 4-pole, 1250 rev/min, 50 Hz three-phase induction motor is controlled by a Variable Voltage Variable Freque

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A5 A 380 V 4 Pole 1250 Rev Min 50 Hz Three Phase Induction Motor Is Controlled By A Variable Voltage Variable Freque 1
A5 A 380 V 4 Pole 1250 Rev Min 50 Hz Three Phase Induction Motor Is Controlled By A Variable Voltage Variable Freque 1 (204.26 KiB) Viewed 38 times
A5. A 380 V, 4-pole, 1250 rev/min, 50 Hz three-phase induction motor is controlled by a Variable Voltage Variable Frequency (VVVF) drive. The magnetic flux is kept unchanged, and the supply frequency is set at 30 Hz. Evaluate (a) the supply line voltage of the motor, (2 marks) (b) the synchronous speed in rev/min, (2 marks) (c) the motor speed in rev/min, and (2 marks) (d) by giving a reason, the supply voltage required for a safe operation if (2 marks) the supply frequency is increased to 60 Hz.
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