Lumenier RB2205C-12 2400KV SKITZO Ceramic Bearing Motor
Thread Tools
Old Oct 27, 2012, 03:42 PM
mir_as82 is offline
Find More Posts by mir_as82
Registered User
Discussion

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.
Sign up now
to remove ads between posts
Old Oct 27, 2012, 11:51 PM
mjsas is offline
Find More Posts by mjsas
Registered User
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.
Old Oct 28, 2012, 03:39 PM
mir_as82 is offline
Find More Posts by mir_as82
Registered User
short time means between 2-6 months.
Old Oct 29, 2012, 11:26 PM
KenSt is offline
Find More Posts by KenSt
Scratch builder
Wrong spring pressure
excessive amps/sq. inch
comm out of round
wrong brush material

PWM controller pulsing at low frequency
Last edited by KenSt; Nov 02, 2012 at 09:33 AM. Reason: added PWM...
Old Nov 05, 2012, 04:32 PM
romeodz is offline
Find More Posts by romeodz
Registered User
Quote:
Originally Posted by mjsas View Post
make a good fuel pump for a small flame thrower
Please elaborate


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion My time in SBSS is running out Ken from Japan South Bay Soaring Society 6 Feb 29, 2012 12:28 AM
Question DC Brushed Motors In Series. Apismelifera Dock Talk 2 Feb 25, 2012 09:22 PM
Discussion Motor Brushes and Commutator run out in short time? mir_as82 Electric Motor Design and Construction 3 Feb 21, 2012 10:28 AM
Discussion Permanent Magnet Dc Motor -AC Voltage?? mir_as82 Electric Motor Design and Construction 3 Dec 22, 2011 11:35 AM
Discussion Permanent Magnet Brushed Motor Air Gap ? mir_as82 Electric Motor Design and Construction 3 Dec 11, 2011 08:34 AM