What is the synchronous speed of a motor?

What is the synchronous speed of a motor?

• A. The maximum speed at which it will run
• B. 95% of its maximum running speed
• C. The average speed under load
• D. The average speed without a load

Answer: (A)

The synchronous speed of a motor refers to the speed at which the magnetic field rotates within the motor. This speed is determined by the frequency of the electrical supply and the number of poles in the motor. In essence, the synchronous speed represents the theoretical maximum speed that the motor can achieve under ideal conditions when there are no mechanical losses or load impacting its operation. When considering the options in the context of synchronous speed, the definition aligns perfectly with the concept of the maximum speed at which the motor is designed to run. It is important to recognize that the actual operating speed of the motor may be slightly lower than the synchronous speed due to factors such as load and slip, but the synchronous speed itself is based purely on the electrical characteristics of the motor. Thus, stating that synchronous speed is the maximum speed at which it will run accurately captures this essential characteristic of motor operation.

The synchronous speed of a motor refers to the speed at which the magnetic field rotates within the motor. This speed is determined by the frequency of the electrical supply and the number of poles in the motor. In essence, the synchronous speed represents the theoretical maximum speed that the motor can achieve under ideal conditions when there are no mechanical losses or load impacting its operation.

When considering the options in the context of synchronous speed, the definition aligns perfectly with the concept of the maximum speed at which the motor is designed to run. It is important to recognize that the actual operating speed of the motor may be slightly lower than the synchronous speed due to factors such as load and slip, but the synchronous speed itself is based purely on the electrical characteristics of the motor.

Thus, stating that synchronous speed is the maximum speed at which it will run accurately captures this essential characteristic of motor operation.