Electrostatic power supply

• US 4,039,927 A
• Filed: 01/12/1976
• Issued: 08/02/1977
• Est. Priority Date: 01/12/1976
• Status: Expired due to Term

• Current Assignee: AMP Limited
• Original Assignee: AMP Limited
• Inventors: Berger, John Gilbert, Richards, George Gilman Jr.
• Primary Examiner(s): Goldberg, Gerald
• Application Number:
  US05/648,225
• Time in Patent Office: 568 Days
• Field of Search: 321/2, 323/17, 320/1, 328/118, 317/262 A, 307/52, 307/57, 307/58, 307/70, 307/83, 307/106-109, 307/110, 307/240, 307/268, 307/297
• US Class Current: 363/17
• CPC Class Codes: H02M 3/285 Single converters with a plurality of output stages connected in parallel parallel operation of a plurality of converters in dc distribution networks H02J1/10
• CPC Class Codes: H02M 3/335 using semiconductor devices only
• CPC Class Codes: H02M 3/33569 having several active switching elements H02M3/3353 takes precedence

Abstract

The invention relates to a power supply circuit utilizing a DC input tied to the primary windings of two transformers. A pulse source drives either primary through a selector switch which selects the desired primary to produce a pulsed transformer output of desired polarity. The transformer secondary windings produce a voltage output discharged by a load supplying capacitor. The voltage output is maintained at a desired polarity and at a peak level by periodically pulsing the load supplying capacitor with the same amount of energy taken by the load.

Claims

1. An electrostatic power supply for supplying an output pulse of selected polarity and peak voltage throughout duration of said pulse, comprising:

transformer means having first and second transformer primaries connected to a D.C. input, each said primary being coupled to reference potential through a normally nonconductive transistor switch,

a pulse source and a polarity selector switch in series with a base of each said transistor switch to supply a pulse selectively to one said transistor switch and render a selected one said primary conductive,

said transformer means having first and second transformer secondaries connected to a common load forming capacitor,

each secondary including a rectifier and a load supplying capacitor in series with said load forming capacitor,

a corresponding one said secondary having a current induced therein upon conduction of said selected one primary, and

means in each said secondary coupled to a corresponding said load supplying capacitor for applying peak secondary voltage thereto whereby said load supplying capacitor remains fully charged and whereby peak energy of said secondary passes through said load supplying capacitor to replace energy drain from said load forming capacitor.

2. The structure as recited in claim 1, wherein, said means comprises:

an alternate series circuit in each said secondary including a resistor and an additional capacitor in series with said load supplying capacitor, and

a diode coupled across said load supplying capacitor and said resistor.