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nukee
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Joined: 8-May 09
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Last Seen: 9th May 2009 - 08:36 AM
Local Time: Mar 12 2010, 06:41 PM
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8 May 2009
Has anyone ever had a problem with the motor getting up to approx 150rpm (1485rpm rated) and the motor stalling with severe vibrations. I just recently read an article about crawl speed (1/7th or 1/13th of rated speed) causing this same problem. I will not get a chance to start the motor for several days due to construction activities. When I get next chance, I plan on increasing the initial voltage to 65% (from 40%) and reducing the ramp time to 4 seconds (down from 8 sec) in an attempt to have enough momemtum to have the motor drive past this "crawl speed".
Also, on a previous attempt to increase initial voltage and reduce ramp time (70% voltage and 2 sec ramp), the soft starter went out on phase loss. However, no fuses or circuit breakers tripped. How could it be that the soft starter that it had a phase loss? Could this be from excessive harmonics generated by the soft starter, causing it to incorrectly sense incoming waveforms, then misfire causing an errant "phase loss" trip. Any help is appreciated. The soft starter was manufactured by Motortronics. Thanks, Nukee |
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Lo-Fi Version | Time is now: 12th March 2010 - 11:41 PM |
