Browse Prior Art Database

High Frequency Power Supply

IP.com Disclosure Number: IPCOM000077080D
Original Publication Date: 1972-Jun-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 3 page(s) / 39K

Publishing Venue

IBM

Related People

Mattson, GL: AUTHOR [+2]

Abstract

Regulation of the level of the output voltage Vo and impressed across LOAD is obtained by controlling the amount of time between successive energy transfers in transformer T1. In each of these transfers, energy is put into the primary winding of transformer T1 and is taken out of the secondary winding of this transformer.

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High Frequency Power Supply

Regulation of the level of the output voltage Vo and impressed across LOAD is obtained by controlling the amount of time between successive energy transfers in transformer T1. In each of these transfers, energy is put into the primary winding of transformer T1 and is taken out of the secondary winding of this transformer.

To obtain this result, switch S1 is turned on for a period of time proportional to the desired flux level in transformer T1, and the time is inversely proportional to the input DC voltage. During this time, current flow in the primary winding of transformer T1 is in the direction indicated, and the voltage across the secondary winding of the transformer T1 is negative, as indicated. Since diode D1 is reverse biased, no current flows in the secondary of T1 when S1 is turned on. The proper length of time during which S1 is turned on can be determined by integrating the voltage at the secondary winding of transformer T1, and the value of this integral is proportional to the flux level in T1. This integrating function is accomplished by the FLUX INTEGRATOR which is responsive to the output voltage of transformer T1. When the desired state of integration is reached, the FLUX INTEGRATOR is effective to turn switch S2 off. The effect of turning switch S2 off is to turn switch S1 off, and this is accomplished through transformer T2.

When switch S1 is thus turned off, energy is dumped from the core of transformer T1 to the secondary winding of transformer T1, and this energy is stored in the condenser C1. The charging of condenser C1 continues in this manner until the flux in transformer T1 has completely decayed. At this time, the MINUS RETURN TO ZERO SENSOR, responsive to the voltage across the secondary winding of transformer T1, allows the cycle to repeat. The REGULATOR responsive...