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High Speed, High Voltage Capacitor Charging with Optional Charge Level Control

IP.com Disclosure Number: IPCOM000094562D
Original Publication Date: 1965-Mar-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Haugh, CF: AUTHOR [+3]

Abstract

Switches 10 and 11 are operated alternately to connect two sections 12 and 13 of a transformer primary winding 14 across a DC to produce an AC across the transformer windings. The switches, shown as knife switches, can be electronic devices with the necessary voltage and current ratings. The left-hand two switches are also operated, at a different time from switches 10 and 11, to alternately connect the two sections of another primary winding 15 to the DC source.

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High Speed, High Voltage Capacitor Charging with Optional Charge Level Control

Switches 10 and 11 are operated alternately to connect two sections 12 and 13 of a transformer primary winding 14 across a DC to produce an AC across the transformer windings. The switches, shown as knife switches, can be electronic devices with the necessary voltage and current ratings. The left-hand two switches are also operated, at a different time from switches 10 and 11, to alternately connect the two sections of another primary winding 15 to the DC source.

The load connected across the transformer secondary winding is a capacitor. The transformer has the appropriate inductance to form a resonant circuit at the switching frequency. Making the load circuit resonant eliminates the reactive current component that would otherwise be conducted by the switches. This reduces the required current rating of the switches and the losses in the circuit.

This circuit is provided with two or more primary windings 14 and 15 and associated switches. The primary windings have different numbers of turns and different load voltages can be provided by operating the switches for the appropriate primary winding. To keep the circuit resonant at the same frequency for each primary winding, each primary winding is constructed to have the same coefficient of coupling with the secondary winding. The effect of keeping the coefficient constant is based on the factors that establish the resonant frequency and...