Will under-voltage damage motor?
Will under-voltage damage motor?
(OP)
I have a 26v 20amp centrifical blower motor that I want to run using a 12v car battery. Will this under-rated power source damage the motor? Besides lower output, what affect might this have on the motor?





RE: Will under-voltage damage motor?
I am guessing that this is a permanent magnet motor.
In general it is excess current that burns out motors. If you have a situation where lower voltage causes more current you may have a problem. This is more likely on loads such as compressors that may stall and not be able to start on reduced voltage.
For a fan you should have no problems.
respectfully
RE: Will under-voltage damage motor?
Gunnar Englund
www.gke.org
RE: Will under-voltage damage motor?
definitely, i agree to waross!
Moola, it seems you dont have to worry.
RE: Will under-voltage damage motor?
DC motors have inherent high starting torques (0 back emf) and are not so encumbered.
RE: Will under-voltage damage motor?
Are you forgetting the problem of operation at high slip as a result of undervoltage? This causes relatively high frequency currents to exist in the rotor which then becomes very hot, cooking the bearings and stator insulation.
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