Vector 750 Watt Power Inverter Bedienungsanleitung PDF herunterladen (Seite 8)

I. INTRODUCTION

A few years ago (Winter of 2000 I believe) I picked up

a number of high voltage multiplier assemblies and

some related parts from a local surplus dealer

(Electronic Surplus Services of Manchester, NH). ESS

was in the process of moving out of their delightful but

dark and dingy 19th century factory building for newer

(smaller, pricier) digs and they were in a mood to let

things go for cheap.

These power supplies came in two major pieces: the

stack of multiplier disks coupled with the hv step up

transformer (20 kV, center tapped) and the rack mount 6

kW 220 volt/3-phase inverter. The inverter puts out

about 800 volts, at 20 kHz. This is stepped up by a

ferrite core transformer in the cascade base to provide

the input to the Cockcroft-Walton full wave multiplier.

Each stage of the multiplier is in the form of a

potted disk and the disks are, in turn, conneted to each

other with a clever set of studs and spacers. All of the

disks are the same and they can be stacked up to 10 high

(200 kV). The cascades that I picked up ranged from 4

to 6 disks and the rated output current was in the range

of 100 mA. Quite lethal. A variety of names were on the

equipment including Hivolt and Wallis.. A bit of

investigating revealed that the company was UK-based

had been through a number of acquisitions, hence the

name changes.

I was able to get quite a bit of information on the

units via the manufacturer’s US sales office. The current

name is HiTek Power and they can be found on the web

at http://hitekp.routo.net

. A major application for these

particular supplies is in ion implanters and the units that

I got were from Eaton’s semiconductor equipment

division (now Axcelis). A complete 60 kV system is

shown in Figure 1.

Having no access to 3-phase power and being

somewhat fearful of 100 mA I really couldn’t use or

justify the inverter portion of the unit. Just to see if the

cascades were functional, I tested them with an

iron-core neon sign transformer (15 kV peak, center

tapped). Each one that I tested was good.

From each cascade assembly I was able to harvest

the following useful components: the ferrite core

transformer (more about this later), the disks (all

positive output with the exception of one six-disk

negative stack), 1 G-ohm resistor for the output

measurement and control circuit, plus a bunch of

specialized hardware including sparkgaps, IGBTs, etc.

II. FIRST VERSION, 60 Hz

Since neon transformers are the leakage type and the

output droops at higher power levels, I dug through my

the Bell Jar, Vol. 10, No. 3/4, Summer/Fall 2001

Figure 1 - HiTek Power OL Series Power Supply

(photo courtesy of Hitek Power)

Figure 2 - The author’s conversion with six-section

120 kV negative cascade, dual 10 kV rms trans-

formers, water resistor and 1 Gigohm divider resistor.

A Happenstance High Voltage Power Supply (and

having fun with DC/AC Inverters)

Steve Hansen

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 24 25

Kommentare zu diesen Handbüchern

Keine Kommentare

Vector 750 Watt Power Inverter Bedienungsanleitung Seite 8

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Netzteile und Wechselrichter Vector 750 Watt Power Inverter