this post was submitted on 06 Oct 2024
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@MangoPenguin Same thing that happens to your car motor when you slam the accelerator from a dead stop rather than gradually accelerating and maintaining a steady speed. Everyone knows stop-and-go traffic is hard on cars, disk drives too.
Car engines have connecting rods and all kinds of extreme side forces on bearings that get stressed under high load. Brushless motors do not have any of those things, just a rotational bearing that doesn't experience any more load on startup vs constant speed.
The startup is absolutely more stressful for the motor. It's a period of high current that also creates hotspots in the windings and such. It's certainly not great for the motor.
Hotspots won't hurt anything unless they get too hot and damage the coating on the windings, I would assume the manufacturer is aware of that and designed the startup current so it's safe.