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Anonymous Poster

single phase induction motor

04/30/2010 11:18 PM

frnds.....ma ceiling fan is running little bit slower than usual...is it due to capacitor?...if it is so.....how can it get start
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stevem
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#1

Re: single phase induction motor

04/30/2010 11:23 PM

Have you tried cleaning and lubricating it?

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hithuanand
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#2

Re: single phase induction motor

05/01/2010 12:09 AM

If the capacitor is disconnected 1 ph indn. motor dont even start rotating.i m sure if the fan is mechanicaly good it is due to inefficiency of capacitor.If u dont have an idea about connections get a new capacitor of same rating and connect it as previous one.pis reply if it works.
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dvmdsc
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#3
In reply to #2

Re: single phase induction motor

05/01/2010 12:21 AM

Get yourself a speed control for ceiling fan they also exist as module that fits into your switch box. Lowes or Home depot sells these. It has at least one capacitor per speed choice. Shorten or take out the existing one and your fan will run like new. Hurry, it is getting hot in here.

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mjb1962853
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#4

Re: single phase induction motor

05/01/2010 4:19 PM

Does your fan have a capacitor? I have 3 ceiling fans and they are all shaded pole motors which don't use capacitors. Cleaning out dust and lubricating the bearing might fix the problem.
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dvmdsc
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#5
In reply to #4

Re: single phase induction motor

05/01/2010 4:59 PM

Most have 2 or 3. Mine are all ok, but my ceilings are too high - I have put the fans on highest speed and have these controllers do the RPM'ing. All 28. The shaded pole array is to get your basic work speed down without using a gear box. (multi poles) the rest is CAP/ CAP - check the hollow spaces.

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mjb1962853
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#6
In reply to #5

Re: single phase induction motor

05/01/2010 5:42 PM

Correct. Multi-segment film cap is well hidden inside my larger fan. Have seen old paper/oil motor caps fail, but have never seen a film cap fail under normal operating conditions. Still think OP fans may just need cleaning & lube.
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Previous in Forum: Two 400hp motors failed to power an 800hp chipper and now they want to add......   Next in Forum: Speed control

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