Why do small DC motors fail?
Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=142700
Printed Date: April 28, 2024 at 7:28 PM
Topic: Why do small DC motors fail?
Posted By: aviator172
Subject: Why do small DC motors fail?
Date Posted: March 01, 2017 at 8:33 AM
Hello.
I have a small USB powered 4 bladed personal comfort fan that is 5 inches in diameter.
It is USB powered. It sits on my desk and I turn it on when my face feels warm.
The problem is they don't last long.
I estimate the fan speed to be 5000rpm. (but really have no idea. It doesn't turn all that fast)
I am wondering what specifically causes these fans to fail after only a short time of use.
Is it most likely the windings in the motor, the brushes or something else?
Maybe the current supplied by USB simply isn't enough?
Thanks
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