Products > Test Equipment

Tester that connects AC load at peak voltage

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slugrustle:
I'm looking for a piece of off the shelf test equipment that connects an AC load to an AC source at the peak of the AC source's voltage waveform.   Ideally it would work with a 240VAC 50Hz input.

The goal is to stress test the AC source.

I'm not looking for something that turns on at the peak every half cycle and then turns off at the zero crossing.  Rather, I'm looking for something that turns on at the peak and stays on.

It's a little hard to search for this... is anyone aware of an off the shelf tester that works like this?

Thanks in advance.

David Hess:
I did a quick search for an AC load which can do that, but did not find anything.  Hopefully someone else knows.

If I needed such a thing, I would design and fabricate the control circuit over an afternoon.

slugrustle:

--- Quote ---If I needed such a thing, I would design and fabricate the control circuit over an afternoon.
--- End quote ---

I have built one of these before, for 120V 60Hz, with a TRIAC.  In that case, the load and heatsinking requirements weren't very high.

For various reasons, in this instance, am looking for something a little more professional than I could cook up quickly, and time is important.  Hence putting "off the shelf" in the original post twice.

TimFox:
You will have a problem sensing the time of the peak voltage, since the first derivative goes to zero at the extreme.
If you have a clean sine wave, you could phase shift it by 90 deg and sense the zero crossing of the resulting cosine wave.

slugrustle:
The source has consistent phase, so the concept would be to detect the zero crossing and delay by 90°.

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