A three-phase delta-connected synchronous induction motor is connected to a 415 volt, 50 Hz supply. The...

 

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A three-phase delta-connected synchronous induction motor is connected to a 415 volt, 50 Hz supply. The winding resistance is negligible and the synchronous reactance per phase is 4 ohms. The input power is 25 kW and the motor has a leading power factor of 0.8. a) find i) Calculate phase current ii) Calculate the stator reactive voltage drop IXS b) Draw the phasor diagram for this machine to scale (use graph paper) i) draw the generated voltage V ii) use the IXS phasor and the V phasor to construct the phasor for E. iii) measure or calculate the magnitude of E iv) By construction and/or by calculation find the load angle A three-phase delta-connected synchronous induction motor is connected to a 415 volt, 50 Hz supply. The winding resistance is negligible and the synchronous reactance per phase is 4 ohms. The input power is 25 kW and the motor has a leading power factor of 0.8. a) find i) Calculate phase current ii) Calculate the stator reactive voltage drop IXS b) Draw the phasor diagram for this machine to scale (use graph paper) i) draw the generated voltage V ii) use the IXS phasor and the V phasor to construct the phasor for E. iii) measure or calculate the magnitude of E iv) By construction and/or by calculation find the load angle