Modular high voltage DC power supply with a removable component rack

• US 3,898,537 A
• Filed: 06/07/1974
• Issued: 08/05/1975
• Est. Priority Date: 06/07/1974
• Status: Expired due to Term

• Current Assignee: Joseph D. Winslow Jr, Weldon D. Mayse
• Original Assignee: Joseph D. Winslow Jr, Weldon D. Mayse
• Inventors: Mayse, Weldon D., Winslow, Joseph D. Jr.
• Primary Examiner(s): Tolin, Gerald P.
• Application Number:
  US05/477,402
• Time in Patent Office: 424 Days
• Field of Search: 204/302 174/18 317/99,100,103,120 321/8R,8C,15
• US Class Current: 361/623
• CPC Class Codes: H01F 2027/408 Association with diode or rectifier
• CPC Class Codes: H01F 27/40 Structural association with built-in electric component, e.g. fuse
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections

Abstract

A high voltage DC power supply for an electrical field treater which includes a hermetically sealed metal enclosure filled with transformer oil immersing a removable rack. The rack has a high voltage transformer mounted upon a base and a vertical guideway receiving one or more voltage multiplier modules which can be inserted therein in only one orientation. Terminal connectors are provided upon an insulated base mounted on the rack and each voltage multiplier unit carries superimposed and subtended complementary terminal connectors. Voltage multiplier units can be readily mounted within the rack for increasing proportionately the DC voltage output of the power supply. The uppermost voltage multiplier module carries a superimposed connector which permits receipt of a mating connector at the end of a flexible lead for conducting high potential current to a high voltage bushing mounted in the wall of the metal enclosure. This arrangement permits the ready installation of the power supply on an electrical field treater, facilitates repairs and simplifies changing the output DC voltage as desired.

Claims

1. A high-voltage DC power supply for an electrical field treater comprising:

a. an open-top metal case adapted to be filled with transformer oil and carrying a removable waterproof cover secured thereto;

b. a rack removably mounted within said metal case, said rack having a base and a plurality of upright supports forming a vertical guideway receiving at least one voltage multiplier module, said vertical guideway carrying keying means whereby each said voltage multiplier module is installed in said vertical guideway in only one orientation;

c. a transformer mounted upon said base within said rack and having a primary winding connectable to a source of power and a secondary winding connected to terminal connectors carried upon an insulated base member mounted on said rack, said terminals forming the AC and DC inputs to each said voltage multiplier module;

d. said at least one voltage multiplier module received within said vertical guideway and carrying superimposed and subtended complementary terminal connectors received on said terminal connectors on said insulated base member, said superimposed and subtended complementary terminal connectors being oriented in pairs whereby a plurality of voltage multiplier modules can be mounted in a superimposed relationship with electrical interconnection being effected by said complementary terminal connectors;

e. each voltage multiplier module having top and bottom insulator members enclosing capacitors and rectifiers with integral wiring therein forming a voltage multiplier stage, one pair of superimposed and subtended complementary terminals forming electrical interconnection to AC input and output terminals from said secondary winding of said transformer and another of said pairs of superimposed and subtended complementary terminals forming electrical interconnection to DC input and output terminals and said secondary winding of said transformer, a flexible conductor having a mating connector at one end and connected to a resistor network at the other end forming the DC output of the power supply, each voltage multiplier module carrying a superimposed connector receiving the mating connector on said flexible conductor, said mating connector connected to the DC output of said voltage multiplier module and received in the superimposed connector on the topmost voltage multiplier module in said vertical guideway;

f. an upright insulating member carrying Said flexible conductor and said resistor network; and

g. a high voltage output bushing mounted in a wall of said case for conducting high-voltage current to an external electrical field treater, and the interior terminal of said bushing connected to said resistor network.

2. The power supply of claim 1 wherein each said voltage multiplier module includes a coupling capacitor connected to the AC input terminal, a filter capacitor between the DC input and output terminals, a pair of series connected rectifiers across said filter capacitor and at the common connection of said rectifiers connected to the AC output terminal.

3. The power supply of claim 1 wherein each said voltage multiplier module comprises top and bottom insulator members secured to a pair of canister capacitors having terminal means connected threadedly through said insulator members to said complementary terminals and electrical wiring between said insulator members connecting said rectifiers, capacitors, complementary terminal connectors, and superimposed connector.

4. The power supply of claim 1 wherein a variable transformer means is mounted on said rack for adjustment of the voltage applied to the primary of said transformer from said power source.

5. The power supply of claim 1 wherein said insulator members of each said voltage multiplier module are channel-shaped, glass reinforced, epoxy resin plastic material.

6. The power supply of claim 1 wherein said complementary terminal connectors are like pairs of male-female units with one pair in superimposed relationship at each side of said voltage multiplier module and a complementary male-female unit carried on the top and bottom insulator members.