In article , Arny
Krueger
wrote:


Therefore, all DC motors are effectively AC motors and they will
similarly all vibrate to some extent.

To quibble pointlessly, in principle you can have Faraday disc motors which
are 'dc'. But I have no idea if anyone has used this for a real-world motor
for anything like a turntable! Not a very practical method I guess.

Slainte,

Jim

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