Comments on: What causes loud humming noise in a permanant magnet dc motor and how to resolve it? http://www.hodgepodgegraphics.com/card-magnet/what-causes-loud-humming-noise-in-a-permanant-magnet-dc-motor-and-how-to-resolve-it Tue, 07 Sep 2010 22:00:59 -0500 http://wordpress.org/?v=2.8.4 hourly 1 By: jay p http://www.hodgepodgegraphics.com/card-magnet/what-causes-loud-humming-noise-in-a-permanant-magnet-dc-motor-and-how-to-resolve-it/comment-page-1#comment-4273 jay p Wed, 24 Feb 2010 02:36:59 +0000 http://www.hodgepodgegraphics.com/card-magnet/what-causes-loud-humming-noise-in-a-permanant-magnet-dc-motor-and-how-to-resolve-it#comment-4273 is there a transformer converting ac to dc? common humming culprit.<br><b>References : </b><br> is there a transformer converting ac to dc? common humming culprit.
References :

]]> By: cs http://www.hodgepodgegraphics.com/card-magnet/what-causes-loud-humming-noise-in-a-permanant-magnet-dc-motor-and-how-to-resolve-it/comment-page-1#comment-4272 cs Wed, 24 Feb 2010 02:00:59 +0000 http://www.hodgepodgegraphics.com/card-magnet/what-causes-loud-humming-noise-in-a-permanant-magnet-dc-motor-and-how-to-resolve-it#comment-4272 make sure all the mounting bolts holding the motor are tight, you sure it's the motor?feel around for the vibration causing the humming, it could be something loose attached near the motor. next, the bearings inside the motor could be bad. you could try grease. not sure if it would be cost effective to change those bearings as you may need a puller and press to change. watch your hair and clothing around spinning parts. the transformer would humm with the power on and the motor off<br><b>References : </b><br>industrial maintenance electrician make sure all the mounting bolts holding the motor are tight, you sure it’s the motor?feel around for the vibration causing the humming, it could be something loose attached near the motor. next, the bearings inside the motor could be bad. you could try grease. not sure if it would be cost effective to change those bearings as you may need a puller and press to change. watch your hair and clothing around spinning parts.

the transformer would humm with the power on and the motor off
References :
industrial maintenance electrician

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