duty cycle for motor longevity?
duty cycle for motor longevity?
(OP)
If a motor was ran for ten seconds on and ten seconds off would it last longer than having it run continuously. Would it be different for ac and dc motors? How much would starting load factor into it? Thanks for any input.
Ben Englund
Ben Englund





RE: duty cycle for motor longevity?
In your 10 second repeating on/off scenario, the inrush current (starting) would overheat the motor windings.
RE: duty cycle for motor longevity?
It is important to know the starter, motor type, speed, load inertia and load torque curve to make an analysis.
For a traditional SCIM handling an average load, a 10 sec run, 10 sec stop repetitive cycle is more severe than a continuous running service due to the high inrush current involved. The mechanical stresses and the heat generated are proportional to the second power of the current.
RE: duty cycle for motor longevity?
Ben Englund
RE: duty cycle for motor longevity?
always remember that it is always less severe for a motor to be running continously rather than on an on/off cycle, no matter what the on/off cycle might be.
RE: duty cycle for motor longevity?
RE: duty cycle for motor longevity?
http://www.joliet-equipment.com/allowable_starts.htm
I think that "always" and "never" are amost always never right
If the motor were very highly loaded above the service factor, then I would think it would certainly be preferable to start it once a year for a few hours than to run it continuously.
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RE: duty cycle for motor longevity?
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RE: duty cycle for motor longevity?