Allen Bradley 1305 VFD
I have a 460v 3 ph. 3 hp. Allen Bradley VFD. I would like to apply DC
to the buss from a single phase power supply instead of a rotary converter. Any problems with this? |
Allen Bradley 1305 VFD
|
Allen Bradley 1305 VFD
On Dec 27, 12:27*am, "
wrote: I have a 460v 3 ph. 3 hp. Allen Bradley VFD. I would like to apply DC to the buss from a single phase power supply instead of a rotary converter. Any problems with this? Maybe you can run the DC bus from an external source, but the control electronics do not run from the DC bus, they need the AC input to some transformer for (possibly?) 5 volts, and whatever other voltages are used to for the logic, and transistor drives. IOW, I think you ~might~ be able to give it the high voltage 680 volts DC power, but you might also have to give it the 480 volts AC to drive the computer and transistor drive/control circuitry. |
Allen Bradley 1305 VFD
Half-Nutz wrote:
On Dec 27, 12:27 am, " wrote: I have a 460v 3 ph. 3 hp. Allen Bradley VFD. I would like to apply DC to the buss from a single phase power supply instead of a rotary converter. Any problems with this? Maybe you can run the DC bus from an external source, but the control electronics do not run from the DC bus, they need the AC input to some transformer for (possibly?) 5 volts, and whatever other voltages are used to for the logic, and transistor drives. Nope, most of the smaller VFDs use a little DC-DC power supply that runs off the main rectifier. You can usually tell these because, when idling and you cut off the mains supply, they continue to "run", ie. the panel display stays active for many seconds, then you get an undervoltage display, then it finally powers down some 15+ seconds after power is removed. Jon |
All times are GMT +1. The time now is 02:51 PM. |
Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004 - 2014 DIYbanter