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Understanding Motor Controls

ISBN: 9781401890162 | 1401890164
Edition: 1st
Format: Hardcover
Publisher: Cengage Learning
Pub. Date: 8/4/2005

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SummaryTable of Contents
Gain the knowledge that industrial electricians in the field need in order to be successful! The subject of motor controls is one of the major areas of concern for industrial electricians, and this book prepares readers for work in the industry. A ?real-world? systems approach is applied to all aspects of motor control, including basic control circuits, sensing devices, solid-state controls, variable speed drives, programmable logic controllers (PLCs), and more. ?Must know? applications, procedures, and operations are stressed throughout. Cover... MORE
Prefacexi
Safety Overview1(2)
Safety Overview3(1)
General Safety Rules3(1)
Effects of Electric Current on the Body4(1)
On ... MORE5(3)
Protective Clothing8(1)
Ladders and Scaffolds9(2)
Fires11(1)
Ground-Fault Circuit Interrupters12(1)
Grounding13(1)
Review Questions14(3)
Section 1 Basic Control Circuits and Components
17(69)
General Principles of Motor Control
19(9)
Installation of Motors and Control Equipment
19(3)
Types of Control Systems
22(1)
Functions of Motor Control
23(4)
Review Questions
27(1)
Symbols and Schematic Diagrams
28(9)
Sensing Devices
32(4)
Review Questions
36(1)
Manual Starters
37(7)
Manual Push Button Starters
40(1)
Troubleshooting
41(2)
Review Questions
43(1)
Overload Relays
44(16)
Dual Element Fuses
45(1)
Thermal Overload Relays
45(6)
Magnetic Overload Relays
51(5)
Overload Contacts
56(1)
Protecting Large Horsepower Motors
57(2)
Review Questions
59(1)
Relays, Contactors, and Motor Starters
60(20)
Relays
60(1)
Electromagnet Construction
61(7)
Contactors
68(4)
Mechanically Held Contactors and Relays
72(1)
Motor Starters
73(6)
Review Questions
79(1)
The Control Transformer
80(6)
Grounded and Floating Control Systems
82(1)
Transformer Fusing
83(2)
Review Questions
85(1)
Section 2 Basic Control Circuits
86(60)
Start-Stop Pushbutton Control
87(13)
Review Questions
99(1)
Multiple Pushbutton Stations
100(6)
Review Questions
105(1)
Forward-Reverse Control
106(10)
Review Questions
111(5)
Jogging and Inching
116(8)
Inching Controls
120(2)
Review Questions
122(2)
Timing Relays
124(9)
Pneumatic Timers
125(1)
Clock Timers
126(1)
Cam or Sequence Timers
127(1)
Electronic Timers
127(5)
Review Questions
132(1)
Sequence Control
133(13)
Stopping the Motors in Sequence
137(5)
Review Questions
142(4)
Section 3 Sensing Devices
146(67)
Pressure Switches and Sensors
147(6)
Differential Pressure
148(1)
Typical Application
149(1)
Pressure Sensors
150(2)
Review Questions
152(1)
Float Switches and Liquid Lever Sensors
153(7)
Mercury Bulb Float Switch
154(1)
The Bubbler System
155(4)
Review Questions
159(1)
Flow Switches
160(4)
Review Questions
163(1)
Limit Switches
164(6)
Micro Limit Switches
165(1)
Subminiature Micro Switches
166(1)
Limit Switch Application
167(2)
Review Questions
169(1)
Temperature Sensing Devices
170(10)
Expansion of Metal
170(5)
Resistance Temperature Detectors
175(3)
Expansion Due to Pressure
178(1)
Review Questions
179(1)
Hall Effect Sensors
180(5)
Principles of Operation
180(1)
Hall Generator Applications
181(3)
Review Questions
184(1)
Proximity Detectors
185(6)
Applications
185(1)
Metal Detectors
185(2)
Mounting
187(1)
Capacitive Proximity Detectors
188(1)
Ultrasonic Proximity Detectors
188(2)
Review Questions
190(1)
Photodetectors
191(10)
Applications
191(1)
Types of Detectors
191(5)
Mounting
196(2)
Photodetector Application
198(2)
Review Questions
200(1)
Reading Large Schematic Diagrams
201(6)
Review Questions
206(1)
Installing Control Systems
207(6)
Component Location
208(1)
Point-to-Point Connection
209(1)
Using Terminal Strips
210(2)
Review Questions
212(1)
Section 4 Starting And Braking Methods
213(71)
Across-the-Line Starting
215(5)
Alternating Current Motors
215(2)
Direct Current Motors
217(2)
Review Questions
219(1)
Resistor and Reactor Starting for AC Motors
220(7)
Resistor Starting
220(2)
Reactor Starting
222(1)
Step Starting
222(4)
Review Questions
226(1)
Autotransformer Starting
227(6)
Open and Closed Transition Starting
230(2)
Review Questions
232(1)
Wye-Delta Starting
233(11)
Wye-Delta Starting Requirements
234(1)
Dual Voltage Connections
235(1)
Connecting the Stator Leads
236(2)
Closed Transition Starting
238(2)
Overload Setting
240(3)
Review Questions
243(1)
Part Winding Starting
244(6)
Overload Protection
245(1)
Dual Voltage Motors
245(1)
Motor Applications
246(1)
Three Step Starting
246(1)
Automatic ShutDown
247(2)
Review Questions
249(1)
Direct Current Motors
250(12)
Field Windings
250(1)
Armature Windings
250(1)
Series Motors
251(1)
Shunt Motors
252(2)
Compound Motors
254(1)
Field Loss Relay
254(1)
External Shunt Field Control
254(1)
Controlling Compounding
255(1)
Cumulative and Differential Compounding
256(1)
Testing the Motor for Cumulative or Differential Compounding
257(4)
Review Questions
261(1)
Single Phase Motors
262(11)
Centrifugal Switch
264(1)
Hot-Wire Starting Relay
264(1)
Current Relay
265(1)
Solid State Starting Relay
266(1)
Potential Starting Relay
267(1)
Dual Voltage Motors
268(1)
Reversing the Direction of Rotation
269(2)
Multispeed Motors
271(1)
Multispeed Fan Motors
271(1)
Review Questions
272(1)
Braking
273(11)
Mechanical Brakes
273(1)
Dynamic Braking
273(2)
Dynamic Braking for Alternating Current Motors
275(3)
Plugging
278(5)
Review Questions
283(1)
Section 5 Wound Rotor, Synchronous, And Consequent Pole Motors
284(32)
Wound Rotor Motors
285(9)
Manual Control of a Wound Rotor Motor
287(1)
Timed Controlled Starting
287(1)
Wound Rotor Speed Control
288(1)
Frequency Control
289(3)
Review Questions
292(2)
Synchronous Motors
294(7)
Starting a Synchronous Motor
294(1)
Excitation Current
295(1)
The Brushless Exciter
295(1)
Direct Current Generator
296(1)
Automatic Starting for Synchronous Motors
296(1)
The Field Contractor
296(1)
Out-of-Step Relay
297(1)
The Polarized Field Frequency
297(2)
Power Factor Correction
299(1)
Applications
300(1)
Review Questions
300(1)
Consequent Pole Motors
301(15)
Three-Speed Consequent Pole Motors
304(6)
Four-Speed Consequent Pole Motors
310(5)
Review Questions
315(1)
Section 6 Variable Speed Drives
316(25)
Variable Voltage and Magnetic Clutches
317(6)
Voltage Control Methods
317(2)
Magnetic Clutches
319(2)
Eddy Current Clutches
321(1)
Review Questions
322(1)
Solid State DC Motor Controls
323(8)
The Shunt Field Power Supply
324(1)
The Armature Power Supply
324(1)
Voltage Control
325(1)
Field Failure Control
326(1)
Current Limit Control
327(1)
Speed Control
327(3)
Review Questions
330(1)
Variable Frequency Control
331(10)
Alternator Control
331(1)
Solid-State Control
332(1)
Some Related Problems
333(1)
IGBTs
333(2)
Advantages and Disadvantages of IGBT Drives
335(1)
Inverter Rated Motors
335(1)
Variable Frequency Drives Using SCRs and GTOs
336(1)
Features of Variable Frequency Control
337(3)
Review Questions
340(1)
Section 7 Motor Installation
341(20)
Motor Installation
343(18)
Determining Motor Current
343(4)
Determining Conductor Size for a Single Motor
347(2)
Overload Size
349(1)
Determining Locked-Rotor Current
350(1)
Short-Circuit Protection
351(1)
Starter Size
352(3)
Example Problems
355(1)
Multiple Motor Calculations
356(4)
Review Questions
360(1)
Section 8 Programmable Logic Controllers
361(24)
Programmable Logic Controllers
363(10)
Differences Between PLCs and PCs
363(1)
Basic Components
364(8)
Review Questions
372(1)
Programming a PLC
373(8)
Circuit Operation
374(1)
Developing a Program
375(2)
Converting the Program
377(2)
Entering a Program
379(1)
Programming Considerations
379(1)
Review Questions
380(1)
Analog Sensing for Programmable Logic Controllers
381(4)
Installation
383(1)
The Differential Amplifier
384(1)
Review Questions
384(1)
Section 9 Developing Control Circuits And Troubleshooting
385(30)
Developing Control Circuits
387(13)
Developing Control Circuits
387(12)
Review Questions
399(1)
Troubleshooting
400(15)
Safety Precautions
402(1)
Voltmeter
402(2)
Test Procedure Example 1
404(2)
Test Procedure Example 2
406(8)
Review Questions
414(1)
Section 10 Laboratory Exercises
415(142)
Laboratory Exercises
417(1)
Foreword
417(1)
Parts List for Laboratory
417(1)
Suppliers
418(3)
Exercise 1 Basic Control
421(11)
Review Questions
432(14)
Exercise 2 Start-Stop Pushbutton Control
433(13)
Review Question
446(6)
Exercise 3 Multiple Push Button Stations
447(5)
Review Questions
452(10)
Exercise 4 Forward-Reverse Control
455(7)
Review Questions
462(10)
Exercise 5 Sequence Control
465(7)
Review Questions
472(12)
Exercise 6 Jogging Controls
474(10)
Review Questions
484(9)
Exercise 7 On-Delay Timers
487(6)
Review Questions
493(9)
Exercise 8 Off-Delay Timers
495(7)
Review Questions
502(8)
Exercise 9 Designing a Printing Press Circuit
505(5)
Review Questions
510(8)
Exercise 10 Sequence Starting and Stopping for Three Motors
511(7)
Review Questions
518(10)
Exercise 11 Hydraulic Press Control
519(9)
Review Questions
528(3)
Exercise 12 Design of Two Flashing Lights
529(2)
Review Questions
531(3)
Exercise 13 Design of Three Flashing Lights
532(2)
Review Questions
534(11)
Exercise 14 Control for Three Pumps
535(10)
Review Questions
545(5)
Exercise 15 Oil Pressure Pump Circuit for a Compressor
546(4)
Review Questions
550(6)
Exercise 16 Auto-Transformer Starter
552(4)
Review Questions
556(1)
Appendix557(1)
Identifying the Leads of a Three-Phase, Wye-Connected, Dual-Voltage Motor557(6)
Glossary563(4)
Index567

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