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Author Topic: Variac and flyback transformer  (Read 1251 times)

f00bard

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Variac and flyback transformer
« on: March 26, 2012, 11:04:53 AM »
A couple of months ago someone from the community donated a big variac and a flyback transformer.  He was using it to etch wood.  I have them up at the space if anyone would like to use them.


A variac is basically a variable transformer that allows for varying AC voltage across the output terminals.  So you plug it into mains (120VAC) and can vary the AC output voltage that comes out.


A flyback transformer is a high frequency transformer that can generate high voltages (on the order of kilovolts).  WARNING: THIS THING CAN KILL YOU.


Both are available for use in the lab.  I'd ask that if you haven't worked with HV before that you find someone who has to help make sure you keep yourself safe.  I'd also ask that you not disassemble or break the variac.  They're pricy and useful in a number of applications so it should be available for lab use when necessary.

Matt

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Re: Variac and flyback transformer
« Reply #1 on: March 26, 2012, 01:28:45 PM »
Another thing to keep in mind is that a variac does NOT isolate from the mains like a regular transformer does. You should never rectify the output and use it directly. ALWAYS run it through a second isolating transformer.

da3v

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Re: Variac and flyback transformer
« Reply #2 on: March 26, 2012, 05:32:12 PM »

Hybridsix

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Re: Variac and flyback transformer
« Reply #3 on: June 11, 2012, 08:57:17 AM »
Do we know what the ratings are on the Variac? I'd love to be able to use it for analog amplifier testing.