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✧✦Catherine✦✧whitequark@treehouse.systems
Jul 9, 2026, 6:57 PM
@mdwyer a compressor stall is an event that occurs if you try to start a compressor with its outlet being at a high pressure (which is the case right after you turn it off). it doesn't have inertia yet so it cannot turn, and the rotor locks (different from mechanical and hydraulic lock). this is bad for the motor
usually pressure equalizes after less than 5 minutes. so the way this is normally handled is a PTC thermistor in the starter winding circuit, once it cools down the motor starts again
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Michael Dwyermdwyer@mastodon.social
Jul 9, 2026, 8:58 PM
@whitequark
Ah! Today I learned! And I didn't have to Google it myself, he said in sheepish shame...
Still, point holds: it would kind of suck to lose cooling for 5 minutes because you had to tie your shoes.
Anyway, I'm excited about your project. I wanted to do something similar, but for sleeping. EightSleep has a mattress-based system, but somehow a wearable sounded more interesting. You can close-mount thermometers and add other sensors, too.
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✧✦Catherine✦✧whitequark@treehouse.systems
Jul 10, 2026, 1:24 AM
@mdwyer I don't think such short misalignment matters? issues only begin when the compressor runs out of lubricant. it can probably run for a minute or two even upside down
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