Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Question
Chapter 33, Problem 1RQ
To determine
Identify the two factors that determine the synchronous speed.
Expert Solution & Answer
Explanation of Solution
Synchronous speed:
The speed at which the magnetic field rotates in a motor is called the synchronous speed. The synchronous speed is given by the formula:
Here, the synchronous speed in RPM is s, the frequency in Hz is f, and the number of stator poles per phase is P.
The two factors that determine the synchronous speed of the motor are given below:
- The number of stator poles per phase.
- The frequency of the applied voltage.
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Chapter 33 Solutions
Understanding Motor Controls
Ch. 33 - Prob. 1RQCh. 33 - Prob. 2RQCh. 33 - What is the advantage of consequent pole motors...Ch. 33 - Prob. 4RQCh. 33 - Refer to the circuit shown in Figure 33–6. You are...Ch. 33 - Refer to the circuit shown in Figure 336. What is...Ch. 33 - Refer to the circuit shown in Figure 33–7. When...Ch. 33 - Prob. 8RQCh. 33 - Refer to the circuit shown in Figure 33–11....Ch. 33 - Refer to the circuit shown in Figure 3311. You are...
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- Name three factors that determine the torque produced by an induction motor.arrow_forwardBriefly explain the effect of the torque taken by the device that loads the motor on the variation of the torsional work and the smoothness of the motor.arrow_forwardThe supply frequency is 50 Hz. What will be the rotor voltage frequency if the motor speed is equal to 90% of synchronous speed. O 45 Hz. O 10 Hz. 05 Hz. O None.arrow_forward
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