April 2021
Intermediate to advanced
404 pages
12h 18m
English
Content preview from Electricity for the Entertainment Electrician & Technician, 3rd Edition
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In the late 1800s there were only two main uses for electricity: lights and motors. And before multi-phase power existed, there were no motors that could run on AC because the torque in a motor is proportional to the applied voltage, and at the 0-volt crossing in a single-phase AC supply, the torque drops to 0 and the motor stalls. It wasn't until later on that shaded-pole motors that could run off of single-phase voltage were invented. That's one of the main reasons why the first electrical power distribution systems were DC systems.
At the end of the nineteenth century, Nikola Tesla conceived and patented a design for a poly-phase AC motor. ...
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