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Help with Wiring up a DC motor
I purchased a used Baldor CD 3475 DC motor to be used with a KB controls KBMD controller. The DC motor has 6 wires (not 3 that I'm used to) A1, A2, F1, F2, F3, F4.
I will be attaching the A1 and A2 to the A+ and A- depending on CCW or CW of the motor shaft. However, I'm confused by the remaining 4 wires F1 etc. According to the wiring diagram on the motor there are two wiring options Hi or low voltage. Which one do I want for a 110v line input? Ultimately, I need a F+ and F- for the controller. Thanks David ![]() ![]() ![]() |
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110V is considered low voltage
Wire nut the odds and evens in two separate bundles
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Chris the more i learn, the less i know |
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From the looks of it the controller is flexible can do full and half voltage out 100/50 so you can just pick one.
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87 930, |
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This is what I have come up with. Can someone please confirm?
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I have modified the schematic to reflect clockwise direction
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That looks correct. What are you driving with the motor? If using it in the lower speed range you will likely need an external fan to cool the motor. I have used those drives with PMDC motors in the past, long ago, and found that I needed to make sure the output voltage was set to less than 90v or the motor would not hold a constant speed.
I was trying to find the reason for using high or low voltage for the field but could not find any explanation.
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87 930, Last edited by 908/930; 09-18-2022 at 08:49 AM.. |
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