Free speedranger drive unit

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Bentworker
Posts: 216
Joined: Fri Mar 02, 2012 1:29 am
Location: State of Jefferson

Re: Free speedranger drive unit

Post by Bentworker » Tue Dec 15, 2020 11:59 am

I’ve seen some old variable AC motors on cranes where the speed (slip) was controlled via a variable resistor connected the the rotor. Seems like it was a popular method of variable speed about 90 years ago.
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