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Where do we need to use a synchronous motor?
For constant speed operation
For we need to control operating Power Factor
Where we have starting arrangement
All of these
All of these
The correct answer is D (All of these) because synchronous motors are well-suited for constant speed operation, control of the power factor, and are effective in various starting arrangements.
The correct answer is D (All of these) because synchronous motors are well-suited for constant speed operation, control of the power factor, and are effective in various starting arrangements.
Speed=P120├ЧfтАЛ тАФ This represents the synchronous speed of the motor, where f is the frequency and P is the number of poles.
Synchronous motors operate by maintaining a constant rotational speed that matches the frequency of the input power supply. They achieve this through the interaction of rotating magnetic fields produced by the stator and rotor, allowing them to run at synchronous speed regardless of the load.
Synchronous motors maintain a constant speed across varying loads.
They can be used to improve power factor in industrial systems.
High efficiency and reliability in continuous operations.
Ability to operate at leading or unity power factor.
Complex starter arrangements required for starting.
More expensive compared to induction motors.
Used in large industrial applications for constant speed drives.
Suitable for synchronous condensers to improve power factor.
Synchronous motors have a wide range of applications due to their stability, but they require careful design in terms of starting mechanisms.
Option A is partially correct as synchronous motors are not typically used where starting torque is crucial.
D is correct тАФ Synchronous motors are designed to meet multiple operational requirements such as constant speed, power factor control, and can be adapted for various starting mechanisms.
Understanding the operation and characteristics of synchronous motors can help in better performance evaluation during competitive exams.