EEC 309 ELECTRICAL MACHINES 2 Exam 2024
About this paper
Examination in Electrical Machines (EEC 309), College of Technology, University of Buea. It covers rotor current and slip for maximum torque of a slip-ring induction motor, induction motor power flow and efficiency, bus current and power factor of induction and synchronous motors in parallel, and the internal voltage, torque angle and maximum torque of a cylindrical-rotor synchronous motor.
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University of Buea
College of Technology - COT
Electrical / Renewable - EET/REN
ELECTRICAL MACHINES 2
Exam · First Semester · Level 300
From this paper
The power input to a 500 V, 50 Hz, 6 pole, 3 phase induction motor running at 975 rev/min is 40 kW. The stator losses are 1 kW and friction and winding losses total 2 kW. Calculate: the slip, rotor copper losses, shaft power, and efficiency. (5 × 4) marks
A 3 phase, 100 hp, 60 Hz 480 V, four pole, wye connected cylindrical rotor synchronous motor has an armature resistance of 0.15 Ω and a synchronous reactance of 2 Ω per phase respectively. Determine the following a) The internal generated voltage (10 marks) b) The torque angle δ (1 mark) c) The maximum torque (4 marks)
At a glance
- Course code
- EEC309 (EEC 309)
- Type
- Exam
- Year
- 2024
- Level
- Level 300
- Semester
- First Semester
- Proposed solution
- Included
Where it's from
University
University of BueaFaculty
College of Technology - COTDepartment
Electrical / Renewable - EET/REN
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