Posted 11 October 2005 - 02:18 PM
or pump if we modify the control to run the motor automatically once the power supply restored back immediately and before the pump completely stop (reacceleration).
Posted 11 October 2005 - 06:09 PM
If there is no back flow problem, you should still make sure there is a small delay, such as 1 second, to ensure that the magnetic field in the motor is not still present when you re-energize. This will only be a problem if the power loss is very momentary. If you always have contactors or breakers that open and have to reclose to restore power, then that delay time would be unnecessary.
Posted 11 October 2005 - 06:30 PM
I'm curious about the reapplying power when the "shaft is still spinning" I have done this many times with no problems, the only proviso is to ensure that the rotor field has decayed. For this, I allow a 1 second delay before reapplying power. Comments?
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Posted 11 October 2005 - 06:37 PM
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