PROGRAMMABLE LOGIC CONTROLLERS (LL)
5th Edition
ISBN: 9781260844146
Author: Petruzella
Publisher: MCG
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Chapter 6, Problem 21RQ
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Using tachometer to measure rotational speed:
- Tachometer is a small AC or DC generator which converts rotational speed into voltage signal.
- It develops an output voltage proportional to its rpm whose phase or polarity depends on the rotor’s direction of rotation.
- The rotor of the tachometer is
mechanically connected to the load...
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