Re: Power supply softstarts

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Roy J. Tellason"
<rtellason@b...> wrote:

> On Monday 04 April 2005 07:56 pm, turbulatordude wrote:
>
> > When I started my power supply, I started with Mariss's E-Stop
> > circuit and added some features I thought would be useful.
>
> Where can this be found?

There are three pdf's on the geckodrive site files section.

each is labeled as some sort of dump circuit.

The one I was referring to uses a relay and a couple switches.

The e-stop uses a momentary to energize a relay. that relay then is
wired so one pole will hold the relay energized. another momentary
(NC) is in that loop to release the relay.

A resistor is then put across the DC bus to drain the caps.

Starting with that circuit, I added indicator lights for the AC and
DC as well as the inrush limiter (thermistor) with it's bypass relay.

I also used multiple lower value capacitors (around 5k uF ) to get a
slightly better ESR (and price) than the 13k uF that I need for the
power supply.

Dave