How Variacs are Construction |
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How Variacs are Construction
Variacs are construction with a toroidal or doughnut shaped magnet steel core. On this core, a single layer of enameled covered magnet wire is tightly wound. A track is machined around the toroid periphery. A carbon brush is positioned to rotated around track, producing variable output voltage to separate terminal. Variacs are construction mostly as auto-transformers and the units are wired to produce a higher voltage out than applied as input voltage. Usually the increased voltage is around 15 percent above the applied voltage, where as output can be varied between 0 volts and 15% above the input voltage. The input voltage in some cases is more than 15% lower than the maximum turns, providing an even greater step-up output voltage. We provide more resources on voltage on our variac voltage page. Variacs are efficient, trouble-free devices and are used to control AC voltage and heat output, light intensity, motor speed, and the output of various power supplies. The name Variac comes from the unit's function "vary ac" and it is a continuously adjustable autotransformer. Another benefit the Varaic provides is a smooth and continuously transformation ratio so the output of the unit can be controlled from zero to line voltage or even higher. How Variacs are Construction - Benefits of Variacs
Variacs are build to last and you will see many models
40 years older or more still in use. For quality
Variacs contract TEMCo a power source
leader since 1968. TEMCo offers quality products and the lowest price
with most products shipped within 24 hours. TEMCo offers not only
quality products but also have highly trained engineering staff to help you
get the right product for the job. See why so many people trust TEMCo
for all their power source needs.
CALL TEMCo for all your transformers
needs!!
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