#windings — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #windings, aggregated by home.social.
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I got this in an #email: ‘Thank you for […] ??’
I was puzzled. It looks like a passive agressive demmand for […], but I already did […].
Then I remembered, at my old workplace, I sometimes received email like ‘Thanks in advance. J’ or ‘Great work! J’
Back then, it took me a while to figure out those people used #Outlook which used #Windings instead of #Unicode for #emoji. The codepoint for ‘J’ looks like 🙂 in Windings!
But ‘?’ renders as ✍️.
I am still puzzled. L
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The actual 3-phase motor is #simple - that's one of the reasons they're used in industry, simple means less to go #wrong. And it appears to be well-made, so there are #quality #bearings and #windings and everything in it. But the motor itself isn't expensive. Rheem probably doesn't pay more than USD 100 for that part of it, and maybe less.
But the bolted-on #control #module #electronics, which make it so you can't easily replace the motor with another unit, are #terrible.
18/x
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How does it #sense the #speed the motor is turning at? The motor only has 3 terminals, and those go to the points between the three motor #windings. There isn't another #signal coming out of the motor to tell the #controller how fast it's actually turning.
Except...
Apparently, while driving those three motor windings, it is #simultaneously sensing the back-#EMF that the windings (which are essentially #electromagnetic #coils) produce from those same terminals.
12/x
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How does it #sense the #speed the motor is turning at? The motor only has 3 terminals, and those go to the points between the three motor #windings. There isn't another #signal coming out of the motor to tell the #controller how fast it's actually turning.
Except...
Apparently, while driving those three motor windings, it is #simultaneously sensing the back-#EMF that the windings (which are essentially #electromagnetic #coils) produce from those same terminals.
12/x
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How does it #sense the #speed the motor is turning at? The motor only has 3 terminals, and those go to the points between the three motor #windings. There isn't another #signal coming out of the motor to tell the #controller how fast it's actually turning.
Except...
Apparently, while driving those three motor windings, it is #simultaneously sensing the back-#EMF that the windings (which are essentially #electromagnetic #coils) produce from those same terminals.
12/x
-
How does it #sense the #speed the motor is turning at? The motor only has 3 terminals, and those go to the points between the three motor #windings. There isn't another #signal coming out of the motor to tell the #controller how fast it's actually turning.
Except...
Apparently, while driving those three motor windings, it is #simultaneously sensing the back-#EMF that the windings (which are essentially #electromagnetic #coils) produce from those same terminals.
12/x
-
How does it #sense the #speed the motor is turning at? The motor only has 3 terminals, and those go to the points between the three motor #windings. There isn't another #signal coming out of the motor to tell the #controller how fast it's actually turning.
Except...
Apparently, while driving those three motor windings, it is #simultaneously sensing the back-#EMF that the windings (which are essentially #electromagnetic #coils) produce from those same terminals.
12/x
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Turn a Ceiling Fan Into a Wind Turbine… Almost - It’s not uncommon to drive around the neighborhood on trash day and see one or two ceiling fans ha... more: https://hackaday.com/2019/06/30/turn-a-ceiling-fan-into-a-wind-turbine-almost/ #inductionmotor #windturbine #ceilingfan #homehacks #generator #windings #magnet #motor #coil
