Electric Motor Control
10th Edition
ISBN: 9781305177611
Author: Herman
Publisher: Cengage
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Chapter 1, Problem 6SQ
To determine
Choose the best option that represents the switch, which can be used to control the motor manually.
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- we are interested in an automatic garage gate system for a building. This system includes a gate that goes up or down, a motor to actuate the gate (pull, push) and sensors to collect information (gate open contact, gate closed contact). The sensors are all similar, each signaling to its controller that a contact has taken place. The user has a remote control to control with just two buttons: open, close. The operating principle of the system is as follows. Suppose the gate is closed. The user opens the gate by pressing the Open button on his remote control. He can stop opening by pressing the Open button again, the motor stops. Otherwise, the gate opens completely and triggers a Gate Open sensor which causes the motor to stop. Pressing the Close button causes the gate to close if it is open (partially or fully). The closing can be stopped by pressing the Close button again, the motor stops. Otherwise, the gate closes completely and triggers a Gate Closed sensor which causes the engine…arrow_forwardWhat is an example of a closed-loop control system? Select one: a. a traditional dishwasher b. a thermostat c. a clock d. a manual garage door openerarrow_forward3. Explain the difference between manual motor starters that provide low voltage release and those that do not.arrow_forward
- list three key items that shoild be monitored by a modern control systemarrow_forwardBecause the controller contains the motor starting relay and the running and starting capacitors, the motor itself contains ______.arrow_forwardUsing the following control devices ,draw an electrical circuit that will manage the direction of rotation of the DC motor. With the pushbutton in its normal state, the motor should be rotating in one direction. Actuating the pushbutton should reverse the motor’s direction of rotation.arrow_forward
- The disconnecting means for a motor controller shall be designed so that it does not _______ automatically per NEC 430.103 A. Open B. Close C. Restart D. Shutdownarrow_forwardChapter 16 1. When adding an XOX timing code to a load, is the load on during the timing period? 2. When connecting the input switch that control a timer, what is the advantage of using a contact-controlled timer instead of a supply voltage-controlled timer?arrow_forwardControl systems i will like answer if fastarrow_forward
- Why is the Limit Switch important?arrow_forwardWith neat diagram explain the working of motor used in elevators. Diagram should draw by Hand and explain.arrow_forwardChoose which answers are correct Which state of Operation in power system utilizes Excitation control as a control action ? a . Emergency b . Normal c . Extreme Emergency d . Alertarrow_forward
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