salvparla
Oct28-09, 11:33 AM
1. The problem statement, all variables and given/known data
A Single Pahse, 50Hz, A.C. Generator is to be used to supply two single phase A.C. induction motors in parallel.
The no-load terminal voltage of the generator is 400V. And it has an output resistance of 0.2ohms and an output inductance of 1mH.
Both motors will be running at 80% of their full load rating
Motor 1 has a full load output rating of 2.5Kw with an efficiency of 70% and at 80% of full load runs with a Power Factor of 0.8 lagging
Motor 2 has a full load outout rating of 4.2Kw with an efficiency of 85% and at 80% of full load runs with a Power Factor of 0.75 lagging
The impedance of the supply cable is negligible
Question:
Express the motor loads as impedance in polar and complex number form assuming the motors are operating at 400V?
Please Help i Dont Know where to start!!
2. Relevant equations
3. The attempt at a solution
A Single Pahse, 50Hz, A.C. Generator is to be used to supply two single phase A.C. induction motors in parallel.
The no-load terminal voltage of the generator is 400V. And it has an output resistance of 0.2ohms and an output inductance of 1mH.
Both motors will be running at 80% of their full load rating
Motor 1 has a full load output rating of 2.5Kw with an efficiency of 70% and at 80% of full load runs with a Power Factor of 0.8 lagging
Motor 2 has a full load outout rating of 4.2Kw with an efficiency of 85% and at 80% of full load runs with a Power Factor of 0.75 lagging
The impedance of the supply cable is negligible
Question:
Express the motor loads as impedance in polar and complex number form assuming the motors are operating at 400V?
Please Help i Dont Know where to start!!
2. Relevant equations
3. The attempt at a solution