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CHAPTER
3
APPLICATIONS
(Table of Contents continued from previous page)
3.3 – Concepts and Principles of Fixed-Speed
Induction Motor Starting and Control . . . . . . . . . . . .3–8
3.3.1
3.3.2
3.3.3
3.3.4
3.3.5
3.3.6
3.3.7
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Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3–8
The Induction Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3–8
Starting Induction Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3–10
Electro-Mechanical Methods Of Starting . . . . . . . . . . . . . . . . . . . . .3–11
The Semiconductor Motor Controller . . . . . . . . . . . . . . . . . . . . . . .3–12
Running Induction Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3–13
Reliability Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3–14
3.4 – Principles of the Optimizing Mode . . . . . . . . . . . . . .3–15
3.4.1
3.4.2
3.4.3
3.4.4
3.4.5
3.4.6
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Principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3–15
Advantages of Energy Optimizing . . . . . . . . . . . . . . . . . . . . . . . . . .3–16
Additional Benefits in Practice . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3–16
Optimizing with the SR44 System . . . . . . . . . . . . . . . . . . . . . . . . . .3–17
How Much Energy? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3–18
Estimating Energy Savings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3–19
3.5 – Chapter 3 Glossary of Terms . . . . . . . . . . . . . . . . . .3–20
3.6 – Power Factor Conversion Chart . . . . . . . . . . . . . . . .3–21
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