Tamas Rudnai wrote:

> dynamic vs static torque: is that something like when you start the motor
> you can stop spinning it with an X power but you can't stop it with the same
> once it spinning?

Sounds like that would be mechanical momentum (if that's the word...) 

You have to overcome the inertia of the rotational movement when you want
to stop a motor. When holding while the motor is rotating at speed, the
rotor inertia works against you, while at the moment it tries to start
moving, it works in favor of you (you being the one trying to stop the
motor).

Gerhard

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