10 Questions
What is a synchronous motor and what is its working principle?
A synchronous motor is a type of AC motor that runs at a constant speed. It generates a rotating magnetic field (RMF) that runs at a constant speed. Its working principle involves converting electrical energy into mechanical energy and it is a self-excited motor that does not require external starters to start the motor.
Why is a synchronous motor known as a constant speed motor?
A synchronous motor is known as a constant speed motor because it runs at a constant speed, maintaining synchronous speed with the rotating magnetic field it generates.
How does the construction of a synchronous motor compare to that of an alternator?
The construction of a synchronous motor is similar to that of an alternator, as both are synchronous machines. The synchronous motor construction is basically similar to a rotating field type alternator.
What are the main components of a synchronous motor?
The main components of a synchronous motor are the stator and the rotor. The stator consists of a three-phase star winding, and the construction is similar to that of a rotating field type alternator.
What is the key feature of a synchronous motor that distinguishes it from a single-phase induction motor?
A key feature of a synchronous motor that distinguishes it from a single-phase induction motor is that it does not need any external starters to start the motor, unlike a single-phase induction motor.
Match the following terms with their descriptions:
Synchronous motor = AC motor that runs at constant speed RMF = Running at constant speed Stator and rotor = Construction similar to an alternator Self-excited motor = Does not need external starters to start the motor
Match the following components with their functions in a synchronous motor:
Stator = Consists of three-phase star Rotor = Similar to end construction of an alternator Synchronous motor = Converts electrical energy into mechanical energy Alternator = Similar construction to a synchronous motor
Match the following statements with the correct motor type:
Runs at constant speed = Synchronous motor Needs external starters to start the motor = Single-phase induction motor Most widely used type of AC motor = Synchronous motor Generates an RMF = Synchronous motor
Match the following descriptions with the correct motor type:
Device which converts electrical energy into mechanical energy = Synchronous motor Known as a constant speed motor = Synchronous motor Does not need any external starters to start the motor = Synchronous motor Runs at a constant speed = Synchronous motor
Match the following terms with their meanings:
AC motor = Converts electrical energy into mechanical energy Constant speed motor = Synchronous motor RMF = Running at constant speed Self-excited motor = Does not need any external starters to start the motor
Test your knowledge of synchronous motors with this quiz! Explore the working principle, applications, and key features of synchronous motors in electrical engineering.
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