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Author Topic: LC filter arrangement for brushed DC motor noise reduction  (Read 2402 times)

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Offline keshab.patelTopic starter

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LC filter arrangement for brushed DC motor noise reduction
« on: March 18, 2017, 04:15:15 am »
   Hi everyone. In the attached a brushed motor's noise is reduced by typical LC filter.   Could you please tell me why 22nF capacitor is used in parallel with the 10uH inductor. Is there any better solution to reduce the noise.
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Offline rs20

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Re: LC filter arrangement for brushed DC motor noise reduction
« Reply #1 on: March 18, 2017, 04:39:47 am »
That's not a typical LC filter -- in a normal LC filter, the L and C are arranged like a voltage divider, not sitting in parallel as you have them shown there. There might be some good reason for arranging Ls and Cs as you have shown in the diagram there, others will comment on that I'm sure, I'm just saying that it's not a typical LC filter.
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