Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 34, Problem 6SQ
What is the difference between a manual faceplate starter and a manual faceplate regulator?
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Chapter 34 Solutions
Electric Motor Control
Ch. 34 - What characteristic of wound rotor motors led to...Ch. 34 - Prob. 2SQCh. 34 - What other name is given to the wound rotor motor?Ch. 34 - Does increased resistance in the rotor circuit...Ch. 34 - Prob. 5SQCh. 34 - What is the difference between a manual faceplate...Ch. 34 - Refer to the basic control schematic in Figure...
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- What is the major difference between a magnetic starter and a contactor?arrow_forwardIndustrial Motor Controls 8.a. A typical motor speed control circuit that is controlled by an analog current loop will have a current ofA. 4-20 mA.B. 2-20 mA.C. 5-50 mA.D. 0-10 mA.8.b. Which one of the following statements is true of a disabled contact or coil?A. The disabled element has been automatically disabled due to module failure.B. The disabled element is held false by the PLC.C. A disabled contact or coil is caused by a faulty memory location in the PLC.D. A contact must be in the disabled state before it can be forced ON or OFF.arrow_forward6.a. When you're taking a PM motor apart you should exercise special care not to damage theA. end bells.B. commutator.C. permanent magnets.D. brush holders.6.b. A PM field servo motor may be equipped with a resolver that is used toA. excite the armature windings.B. create a voltage that increases with velocity.C. prevent the brushes from sparking.D. feed back position information.arrow_forward
- 1- Can a simple variable resistor be used instead of the fan speed regulator? and why? 2-Mention some applications in which such regulators can be used? 3-Can these organizations use to regulate the speed of cooling engines or heating devices? And why? 4-Mention some malfunctions you have seen due to the fan speed regulator in your working life? Do you suggest a method to avoid or fix it?arrow_forwardWhat is the function of the shunt field rheostat?arrow_forwardAir- cold condensers use? To drive air across the condensing coil. A. ambient evaporation b. A pump c. A temperature-difference fan d. A motor--driven fanarrow_forward
- Flow measurement Controller Valve Process Determine type of control schematic block diagram shown above A. Close loop control On-off control C. Open loop control D. Feed-forward control B.arrow_forwardDraw an electrical diagram for a Star Delta starter with a forward rotation and reverse rotation switch.arrow_forwardExplain how a direct online (DOL) magnetic starter works with diagrams and picturesarrow_forward
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