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Oct 27, 2012, 02:42 PM
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Joined Mar 2011
97 Posts
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Why brushes run out in dc 24 Volt permanent magnet blower motor in short time?
brushes and commutator dont have any problem. But brushes are runned out in short time in 24V permanent magnet dc motor.
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Oct 27, 2012, 10:51 PM
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Joined Nov 2007
748 Posts
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What do you mean by 'short time'.
I found that a standard automotive windshied washer pump will run a long time at 12 volts but at 24 volts the brushes get hot and break apart in a few seconds. At 18 volts they run OK and make a good fuel pump for a small flame thrower. Otherwise there is no reason brushes cannot last thousands of hours at any voltage. |
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Oct 28, 2012, 02:39 PM
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Joined Mar 2011
97 Posts
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short time means between 2-6 months.
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Oct 29, 2012, 10:26 PM
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USA, PA, Telford
Joined Apr 2004
1,299 Posts
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Wrong spring pressure
excessive amps/sq. inch comm out of round wrong brush material PWM controller pulsing at low frequency |
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Last edited by KenSt; Nov 02, 2012 at 08:33 AM.
Reason: added PWM...
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Nov 05, 2012, 03:32 PM
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Tennessee
Joined Mar 2005
101 Posts
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Quote:
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