Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 38, Problem 2SQ
To determine
Explain how the solid state adjustable speed controllers are compared with secondary resistor control.
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Explain open loop control and closed loop control. what are the main differences between them? give an example from daily for each.
Identify and describe the basic functional elements that could be used in closed loop control for the following systems:
1) speed controlled electric motor
2) rollers in a steel strip meel being used to maintain a constant thickness of steel strip
include block diagrams for each and suggest examples of sensors, controllers and actuators that might be selected in each environment
Chapter 38 Solutions
Electric Motor Control
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- Explain why control torque should be equal to deflection torque,happens if the control is more than deflation Torque.arrow_forwardWhat kind of use of motor speed controller is compared to other control systems? have advantages? Explain.arrow_forwardWhy do you think some motor control circuit utilizes single voltage sources for control and power circuit? Explain.arrow_forward
- What is set point in control systems?arrow_forwardWhich of the following is an example of a manual speed controller for a wound-rotor motor? a. Variable frequency drive b. Timers/Control Relays c. SCR Controller d. Faceplate Controllerarrow_forwardName three applications for control systems and explain briefly why is it a control system Give one reason for not using feedback control systemarrow_forward
- Identify and describe the basic functional elements that could be used in closed loop control for the following systems listed below. Include block diagrams for both, and give examples of sensors, controllers and actuators that would be used for both. 1) speed controlled electric motor 2) rollers in a steel strip meel being used to maintain a constant thickness of steel striparrow_forward------ What is the difference between the servo motor and the stepper motor in construction, principle of works and applications ?arrow_forwardQ1. Answer/Interpret the following: C-142 HHH SHUNT FIELD 11mm!? A1 AZ ARA CR-1 STOP START C₂ Co-3 CR₂ o 1. Objective of this controller: 2. If stop is pressed and CRD-1 remains open, explain and fix the issue. 3. Start pressed and the Motor over speeds,, explain and fix the issue. 4. Start pressed and the Motor Jogs: Fix this issue 5. Effect of Resistancearrow_forward
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