11/22/2012 1:10 PM | |
Posts: 14 Rating: (1) |
Howdy, I am new to Sinamics DCM, and the first drive I am trying to commission is failing on the first optimisation run - This drive is brand new and had not been powered at all before the commissioning/configuration. I have commissioned 6RA70's before, so I am assuming I am doing something stupid or have missed something. My motors field ratings are 310VDC and 8.2A (No field weakening rating is listed however, the RPM data is shown as 770/2850, so I guess the drive calculates the current for the max field weakening)? Here is what I know: The Field Line voltage is constant at 400VAC at all times during the optimisation The Field Output remains at 0VDC at all times (with the field winding in circuit) When I tested the Field output without the motor coil in circuit, the field voltage sits at 488VDC, but I have assumed this is a floating value as there is no current flow. The Field winding measures 31ohms (Which kind of agrees with the estimated V/I calculation of the motor) Each leg of the Field winding meggers > 100Mohms to Ground (including the cable to the motor) I have increased the delay for the fault in case of a slow build up (high inductance), but even after 5s, we still had 0VDC and of course the fault 60105(2). First off, I had the field switch in with the line contactor (Which we don't have, so I am assuming this is just a part of the sequence where the field is kicked in) When I changed the Field control to permanent, I still have 0VDC I tried to derate the field in case this caused a problem, which is why the attached archive shows 54% in the derating (This did not work even when it was 100%) I have attached the drive backup, so I would really appreciate someone having a look at this and see if I have missed something really obvious, because at the moment, I think the field rectifier is not operational, but because it's my first DCM, I should probably rule myself out first. Drive: 6RA8078-6DV62-0AA0 Motor: 1GF5225-0WC44-Z Kind regards, Grant
AttachmentNew_lath.zip (340 Downloads) |
4/16/2016 12:55 AM | |
Joined: 1/5/2016 Last visit: 9/25/2024 Posts: 1 Rating: (0) |
Hi, we have the same problem, is there any remedy? |
4/23/2018 8:21 AM | |
Joined: 6/19/2017 Last visit: 9/6/2024 Posts: 8175 Rating: (172) |
New question published by dipak123 is split to a separate thread with the subject Drive is running in jog mode and in STARTER software display is wait for the voltage at 3U1. Best regards |