Neilgrimsley
Lifetime Supporting Member
Let me start off saying how much i am going to appreaciate and enjoy your posts on this topic. I can use the ideas ...
i have two identical (?)presses with 100HP motors. They are being controlled with MagneTek GPD 515C-B128 drives .... One is running fine but the other is faulting out with a "DC BUS OVERVOLTAGE" fault anytime the speed decreases on the drive. Ramping up is not an issue, only when we slow it down or stop it. The DC BUS does spike in the range of 700-800 volts when it faults, so it is real ....
Any suggestions on what could be causing this? I have checked the parameters between the two VFD's but feel free to point me in that direction, if you feel I may have overlooked something. Any ideas will be greatly appreaciated.
i have two identical (?)presses with 100HP motors. They are being controlled with MagneTek GPD 515C-B128 drives .... One is running fine but the other is faulting out with a "DC BUS OVERVOLTAGE" fault anytime the speed decreases on the drive. Ramping up is not an issue, only when we slow it down or stop it. The DC BUS does spike in the range of 700-800 volts when it faults, so it is real ....
Any suggestions on what could be causing this? I have checked the parameters between the two VFD's but feel free to point me in that direction, if you feel I may have overlooked something. Any ideas will be greatly appreaciated.