RC Snubber for large DC motor spikes

6 years 10 months ago #29528725 by cadomanis
We have an application using an HDC2450 to run (2) Etek 100A motors for a friction drive machine. We have seen cases where we we believe we are seeing large power spikes on the motors because of some loading conditions in the track the units are following. This big current spikes seem to cause problems with some of the other parts of our control system. In reading through the manual I saw a mention of adding a RC snubber to the motor outputs to try and help with "noise" problems. Do you have any more specific suggestions for the implementation of those snubber circuits?

Thanks,

Chuck

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6 years 10 months ago #29528729 by Griffin Baker
Replied by Griffin Baker on topic RC Snubber for large DC motor spikes
1uF and 10 ohm, but it is not likely to make a big difference. Also try twisting the pair of motor wires and shield the cables. This will help with noise.

If that doesn't work, we suggest that you try some of the other techniques listed in our manual page 28.
• Keep wires as short as possible
• Loop wires through ferrite cores
• Add snubber RC circuit at motor terminals
• Keep controller, wires and battery enclosed in metallic body

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