Electrical Engineering XYZ MCQs
Which of the following motor is expensive for same kW output rates:
- DC shunt motors
- Synchronous motor
- AC single phase motor
- Induction motor
Correct answer: 2. Synchronous motor
Explanation: Synchronous motors require additional components such as slip rings and brushes or electronic excitation systems. They also need complex control systems to maintain synchronism with the AC power supply frequency. These factors contribute to higher initial costs and potentially higher maintenance costs over the lifetime of the motor compared to other types of motors like induction motors.