CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] Rectifiers

Posted by Jon Elson
on 2000-12-23 22:13:18 UTC
Greg Nuspel wrote:

> I just realized I don't have a 10 amp rectifier for my circuit. Is it
> acceptable to run two bridged rectifiers in parallel to achieve the rating
> required?

It is not good practice. The reason is that diodes have variations
in forward voltage drop, so that one diode almost always carries
the majority of the load. So, you might get away with it, but if you
are running anywhere near full load, it could cause a failure.

There are techniques of adding ballast resistors to reduce the
effect voltage drop has on resistance, but it gets complicated
to do it right, since the current is constantly changing through
time.

Jon

Discussion Thread

Greg Nuspel 2000-12-23 06:50:37 UTC Rectifiers Hugh Prescott 2000-12-23 07:21:34 UTC Re: [CAD_CAM_EDM_DRO] Rectifiers Greg Nuspel 2000-12-23 07:51:46 UTC Re: [CAD_CAM_EDM_DRO] Rectifiers Jon Elson 2000-12-23 22:13:18 UTC Re: [CAD_CAM_EDM_DRO] Rectifiers Jon Elson 2000-12-23 22:15:42 UTC Re: [CAD_CAM_EDM_DRO] Rectifiers Mariss Freimanis 2000-12-24 10:01:10 UTC Re: Rectifiers