This was sent a while ago by Mike for our exploration. It's a machine start/stop button that automatically releases when the power fails. In this case the button was not latching properly.

See if you can spot the really dumb mistake I made in the video. I prefer to leave the mistakes in, as it represents real life.

One of the most interesting parts of this unit is the shaded pole electromagnet. It has its core split at the end and a loop of copper is put around it to introduce a phase shift that allows the two parts of the core to maintain a magnetic force as it passes the zero crossing point. That is also used to make AC relays quieter.

The main purpose for having a coil latch the on-button is to ensure that in the event of power failure, the switch defaults to off. That avoids the risk of the machine starting unexpectedly while someone is working on it.

I've never really done the "like and subscribe" thing in the past as I thought it was a bit tacky. But I'm going to be testing it in a few videos to see what effect it has. In some I'll mention I'm doing the test, but in others I'll just drop the simple line "If you enjoy my videos, please consider subscribing." Nice and short so it doesn't seem tacky. I'm definitely not going to suggest people enable notifications, as I put out so much content that it would be like spam.


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I release content for critique and feedback on Patreon as soon as it has been made.

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#ElectronicsCreators
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https://www.youtube.com/watch?v=uy2lrpDDNGI