 |
Hello and welcome to LMPForum, like most online communities you must register to view or post in our community, but don't worry this is a simple free process that requires minimal information. Take advantage of it immediately Register Now There are many great features that are not available to guests at LMPForum |
Forgot Password |
  |
Mv Soft Starter Problem |
·
·
·
·
·
·
·
·
·
·
·
·
 May 8 2009, 01:58 PM
Post
#1
|
|
 Group: Members Posts: 1 Joined: 8-May 09 Member No.: 5,360  |
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 |
 |
 
|
|
May 10 2009, 02:57 AM
Post
#2
|
|
|
Posting Freak Group: Moderator Posts: 2,383 Joined: 24-April 02 From: Christchurch, New Zealand Member No.: 1 |
Hello Nukee
Welcome to the forum. Next time you start th motor, see if you can measure the speed where the vibration becomes a problem. If this is 1/7 or 1/13 of synchronous speed, then you have a crawling problem. If the speed is different, then I would look at coupling alignment, motor and load mounting etc. Best regards, Mark. -------------------- Mark Empson administrator
Skype Contact = markempson | phone +64 274 363 067 LMPForum | LMP Tech Warehouse | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | LMP Software | Mark Empson Website |
|
|
|
|
Similar Topics
| Topic Title | Replies | Topic Starter | Views | Last Action | |||
|---|---|---|---|---|---|---|---|
 |
34 | marke | 20,133 | 10th July 2009 - 04:11 AM Last post by: wrav001 |
|||
 |
5 | uhaykir | 4,983 | 5th July 2002 - 09:08 AM Last post by: marke |
|||
|
3 | marke | 6,007 | 24th January 2003 - 07:05 PM Last post by: marke |
|||
|
1 | marke | 3,623 | 14th July 2003 - 12:44 AM Last post by: GGOSS |
|||
|
3 | -Ravisankar- | 3,411 | 28th June 2002 - 08:04 AM Last post by: GGOSS |
|||
|
Lo-Fi Version | Time is now: 7th September 2010 - 03:27 PM |
