Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Textbook Question
Chapter 29, Problem 8RQ
What two factors determine synchronous speed?
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The piston rod of a double-acting cylinder is to advance when a 3/2- way push button valve is actuated manually. The cylinder is to remain advanced until a second valve is actuated. The signal of the second valve can only take effect after the first valve has been released. The cylinder is to then return to the initial position. The cylinder is to remain in the initial position until a new start signal is given. The speed of the cylinder is to be adjustable in both directions.Draw the circuit diagram for the problem.
Based on the timing diagram below, choose the correct statement regarding Timer Relay.
On
Coil
Power
ff
+ 5 →
Seconds
Closed
Contact
Status
Open
Time
Select one or more:
O a. This is the OFF-Delay Relay
O b. This is the ON-Delay Relay
O c. The relay can used in automatic gate at car parking application :- when sensor detect car already pass
by to parking area, motor to control gate closing will turn ON after a few minutes.
O d. When the coil energized, the relay contact will make connection at the same timing.
What is the mechanism's Degree of Freedom
Chapter 29 Solutions
Understanding Motor Controls
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- A swivel bridge is bought into the desired position by means of a double–acting cylinder. The piston rod of a double–acting cylinder is to extend when a push button switch is actuated. The cylinder is to remain extended until a second switch is actuated and only if the first switch has been released. The cylinder is to then return to the initial position. The cylinder is to remain in the initial position until a new start signal is given. The speed of the cylinder is to be adjustable in both directions of travel. a) Draw the pneumatic and electro-pneumatic circuits of the systemarrow_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_forwardIn a quick return mechanism, if the imbalance angle is 25°, then the time ratio approximately equal to O 1.4 O 1 O 1.32 O 1.65arrow_forward
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