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3 phase motor dc capacitor brake

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gombault

Joined Nov 15, 2020
18
Hi.
I have a wire EDM machine that must stop the 3 phase motor fast. The machine got 3 large 400 volt capacitors connected in parallel to that circuit, but i can only find a single diode connected to them. How can one diode change the caps to DC? The wire connections all look original, only the diode wire connection don't look original.
 
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