Solid-state regulation of power supplies

Claim 2

A regulated power supply comprising: A. a rectifier section adapted to convert alternating current to direct current, B. a power regulator responsive to an applied direct voltage said element being interposed between an alternating current source and the input to said rectifier section, C. a load circuit coupled to the output of said rectifier section, D. means interposed in said load circuit to produce at least one sensing voltage linearly reflecting a change in load current or voltage, E. a proportional control circuit, including a transistor having two input electrodes and an output electrode, F. means to amplify said sensing voltage and to apply to as a bias to one input electrode of said transistor, G. means simultaneously to apply said sensing voltage algebraically combined with an adjustable reference voltage to the other input electrode to produce at said output electrode a feedback voltage linearly proportional to said sensing voltage, and H. means to apply said feedback voltage to said element to effect linear regulation of said supply.

Claim 3

A supply as set forth in claim 1, wherein said power regulator is an SCR device operating in conjunction with a gating circuit, a DC voltage-responsive means to vary the gating angle whereby the firing point of said device is controlled by said feedback voltage.

Claim 4

A supply as set forth in claim 1, wherein said power regulator is a variable time delay means to which the feedback voltage is applied to effect varying firing angles.

Claim 5

A supply as set forth in claim 1, wherein said sensing resistor is interposed in series with the load circuit to produce a sensing voltage as a function of changes in load current, said resistor being a low-resistance meter shunt whereby said sensing voltage is in the millivolt range.

Claim 6

A supply as set forth in claim 1, wherein said sensing resistor is a voltage divider connected across the load circuit to produce a sensing voltage as a function of changes in said voltage.

Claim 7

A supply as set forth in claim 1, wherein said amplified sensing voltage is applied to the base of said transistor, and said combined voltage to tHe emitter thereof.

Claim 8

A regulated power supply comprising: A. a rectifier section adapted to convert alternating current to direct current, B. a power regulator responsive to an applied direct voltage said element being interposed between an alternating current source and the input to said rectifier section, C. a load circuit coupled to the output of said rectifier section, D. a sensing resistor interposed in said load circuit to produce a sensing voltage linearly reflecting a change in load current or voltage, E. a proportional control circuit, including a transistor having two input electrodes and an output electrode, F. means to amplify said sensing voltage and to apply it as a bias to one input electrode of said transistor, G. means simultaneously to apply said sensing voltage algebraically combined with an adjustable reference voltage to the other input electrode to produce at said output electrode a feedback voltage linearly proportional to said sensing voltage, H. means to apply said feedback voltage to said element to effect regulation of said supply, and whereby I. said voltage is produced in a summing network having a pair of potentiometers in parallel relation, a reference voltage being applied to one junction of the network, the other junction being connected to said other input electrode.

Claim 9

A regulated power supply comprising: A. a rectifier section adapted to convert alternating current to direct current, B. a power regulator responsive to an applied direct voltage said element being interposed between an alternating current source and the input to said rectifier section, C. a load circuit coupled to the output of said rectifier section, D. a sensing resistor interposed in said load circuit to produce a sensing voltage linearly reflecting a change in load current or voltage, E. a proportional control circuit, including a transistor having two input electrodes and an output electrode, F. means to amplify said sensing voltage and to apply it as a bias to one input electrode of said transistor, G. means simultaneously to apply said sensing voltage algebraically combined with an adjustable reference voltage to the other input electrode to produce at said output electrode a feedback voltage linearly proportional to said sensing voltage, H. means to apply said feedback voltage to said element to effect regulation of said supply, and whereby I. said voltage is produced in a summing network having a pair of potentiometers in parallel relation, a reference voltage being applied to one junction of the network, the other junction being connected to said other input electrode.

Claim 10

A supply as set forth in claim 7, wherein a sensing voltage from said resistor reflecting a change in load current is applied to the slider of one of said potentiometers.

Claim 11

A supply as set forth in claim 8, wherein a sensing voltage from said resistor reflecting a change in load voltage is applied to the slider of the other potentiometer.