Voltage stabilizer with reversible binary counter for alternating-current lines

Claim 1

A system for stabilizing the output voltage of a transmission line connected across a source of alternating current, comprising: sensing means connected to said line for determining any deviation of the line voltage from a predetermined level; pulse-generating means controlled by said sensing means for producing, within each cycle of said line voltage, a train of stepping pulses varying in length with the magnitude of such deviation; reversible counter means coupled to said pulse-generating means for stepping by said pulse train with a sense of counting determined by the sign of said deviation, said counter means having a plurality of stages selectively settable according to a binary code by the pulses of said train; a voltage generator having a sinusoidal output voltage synchronized with said line voltage; transformer means connected across said voltage generator, said transformer means including a plurality of secondary windings inserted in said line with graded transformation ratios for impressing different voltage increments upon said line, said secondary windings being proportioned to introduce voltage increments bearing a binary relationship, said counter means being provided with switchover means for reversing said sense of counting upon arrival of said counter means in a zero position, said voltage generator being of reversible phase and being coupled to said switchover means for simultaneous reversal of said phase and said sense of counting; and enabling means for said secondary windings responsive to the setting of respective stages of said counter means for introducing said voltage increments to compensate for said deviation.

Claim 2

A system for stabilizing the output voltage of a transmission line connected across a source of alternating current, comprising: sensing means connected to said line for determining any deviation of the line voltage from a predetermined level; pulse-generating means controlled by said sensing means for producing, within each cycle of said line voltage, a train of stepping pulses varying in length with the magnitude of such deviation; reversible counter means coupled to said pulse-generating means for stepping by said pulse train with a sense of counting determined by the sign of said deviation, said counter means having a plurality of stages selectively settable according to a binary code by the pulses of said train; a voltage generator having a sinusoidal output voltage synchronized with said line voltage; transformer means connected across said voltage generator, said transformer means including a plurality of secondary windings inserted in said line with graded transformation ratios for impressing different voltage increments upon said line, said secondary windings being proportioned to introduce voltage increments bearing a binary relationship, said counter means being provided with switchover means for reversing said sense of counting upon arrival of said counter means in a zero position, said voltage generator being of reversible phase and being coupled to said switchover means for simultaneous reversal of said phase and said sense of counting; and enabling means for said secondary windings responsive to the setting of respective stages of said counter means for introducing said voltage increments to compensate for said deviation.

Claim 7

A system for stabilizing the output voltage of a transmission line connected across a source of alternating current, comprising: sensing means connected to said line for determining any deviation of the line voltage from a predetermined level; pulse-generating means controlled by said sensing means for producing, within each cycle of said line voltage, a train of stepping pulses varying in length with the magnitude of such deviation; reversible counter means coupled to said pulse-generating means for stepping by said pulse train with a sense of counting determined by the sign of said deviation, said counter means having a plurality of stages selectively settable according to a binary code by the pulses of said train; a voltage generator having a sinusoidal output voltage synchronized with said line voltage; transformer means connected across said voltage generator, said transformer means including a plurality of secondary windings inserted in said line with graded transformation ratios for impressing different voltage increments upon said line, said secondary windings being proportioned to introduce voltage increments bearing a binary relationship, the number of said stages being a multiple of the number of said secondary windings, said stages being divided into groups assigned to respective secondary windings; and enabling means for said secondary windings responsive to the setting of respective stages of said counter means for introducing said voltage increments to compensate for said deviation, said enabling means including coding means responsive to individual stages of each group for multiplying said output voltage by different constants.

Claim 8

A system for stabilizing the output voltage of a transmission line connected across a source of alternating current, comprising: sensing means connected to said line for determining any deviation of the line voltage from a predetermined level; pulse-generating means controlled by said sensing means for producing, within each cycle of said line voltage, a train of stepping pulses varying in length with the magnitude of such deviation; reversible counter means coupled to said pulse-generating means for stepping by said pulse train with a sense of counting determined by the sign of said deviation, said counter means having a plurality of stages selectively settable according to a binary code by the pulses of said train; a voltage generator having a sinusoidal output voltage synchronized with said line voltage; transformer means connected across said voltage generator, said transformer means including a plurality of secondary windings inserted in said line with graded transformation ratios for impressing different voltage increments upon said line, said secondary windings being proportioned to introduce voltage increments bearing a binary relationship, the number of said stages being a multiple of the number of said secondary windings, said stages being divided into groups assigned to respective secondary windings; and enabling means for said secondary windings responsive to the setting of respective stages of said counter means for introducing said voltage increments to compensate for said deviation, said enabling means including coding means responsive to individual stages of each group for multiplying said output voltage by different constants.

Claim 10

A system for stabilizing the output voltage of a transmission line connected across a source of alternating current, comprising: sensing means connected to said line for determining any deviation of the line voltage from a predetermined level; pulse-generating means controlled by said sensing means for producing, within each cycle of said line voltage, a train of stepping pulses varying in length with the magnitude of such deviation; reversible counter means coupled to said pulse-generating means for stepping by said pulse train with a sense of counting determined by the sign of said deviation, said counter means having a plurality of stages selectively settable by the pulses of said train, said counter means being provided with register means for storing the setting of said stages over at least a major part of a half-cycle of said line voltage; a voltage generator having a sinusoidal output voltage synchronized with said line voltage; transformer means connected across said voltage generator, said transformer means including a plurality of secondary windings inserted in said line with graded transformation ratios for impressing different voltage increments upon said line, said transformer means including a plurality of primary windings individually coupled to said secondary windings, said enabling means comprising at least two semiconductive devices in circuit with each primary winding; enabling means for said secondary windings responsive to the setting of respective stages of said counter means for introducing said voltage increments to compensate for said deviation; trigger means for alternately rendering said devices conductive; and transfer means connected to said line for initiating the transmission of the contents of said register means to said trigger means at a predetermined point in each cycle of said line voltage.

Claim 11

A system for stabilizing the output voltage of a transmission line connected across a source of alternating current, comprising: sensing means connected to said line for determining any deviation of the line voltage from a predetermined level; pulse-generating means controlled by said sensing means for producing, within each cycle of said line voltage, a train of stepping pulses varying in length with the magnitude of such deviation; reversible counter means coupled to said pulse-generating means for stepping by said pulse train with a sense of counting determined by the sign of said deviation, said counter means having a plurality of stages selectively settable by the pulses of said train, said counter means being provided with register means for storing the setting of said stages over at least a major part of a half-cycle of said line voltage; a voltage generator having a sinusoidal output voltage synchronized with said line voltage; transformer means connected across said voltage generator, said transformer means including a plurality of secondary windings inserted in said line with graded transformation ratios for impressing different voltage increments upon said line, said transformer means including a plurality of primary windings individually coupled to said secondary windings, said enabling means comprising at least two semiconductive devices in circuit with each primary winding; enabling means for said secondary windings responsive to the setting of respective stages of said counter means for introducing said voltage increments to compensate for said deviation; trigger means for alternately rendering said devices conductive; and transfer means connected to said line for initiating the transmission of the contents of said register means to said trigger means at a predetermined point in each cycle of said line voltage.

Claim 13

A system for stabilizing the output voltage of a transmission line connected across a source of alternating current, comprising: sensing means connected to said line for determining any deviation of the line voltage from a predetermined level, said sensing means comprising a rectifier, a source of reference voltage, integrator means receiving both said reference voltage and the output of said rectifier, and threshold means connected to the output of said integrator means; pulse-generating means controlled by said sensing means for producing, within each cycle of said line voltage, a train of stepping pulses varying in length with the magnitude of such deviation; reversible counter means coupled to said pulse-generating means for stepping by said pulse train with a sense of counting determined by the sign of said deviation, said counter means having a plurality of stages selectively settable by the pulses of said train; a voltage generator having a sinusoidal output voltage synchronized with said line voltage; transformer means connected across said voltage generator, said transformer means including a plurality of secondary windings inserted in said line with graded transformation ratios for impressing different voltage increments upon said line; and enabling means for said secondary windings responsive to the setting of respective stages of said counter means for introducing said voltage increments to compensate for said deviation.

Claim 14

A system for stabilizing the output voltage of a transmission line connected across a source of alternating current, comprising: sensing means connected to said line for determining any deviation of the line voltage from a predetermined level, said sensing means comprising a rectifier, a source of reference voltage, integrator means receiving both said reference voltage and the output of said rectifier, and threshold means connected to the output of said integrator means; pulse-generating means controlled by said sensing means for producing, within each cycle of said line voltage, a train of stepping pulses varying in length with the magnitude of such deviation; reversible counter means coupled to said pulse-generating means for stepping by said pulse train with a sense of counting determined by the sign of said deviation, said counter means having a plurality of stages selectively settable by the pulses of said train; a voltage generator having a sinusoidal output voltage synchronized with said line voltage; transformer means connected across said voltage generator, said transformer means including a plurality of secondary windings inserted in said line with graded transformation ratios for impressing different voltage increments upon said line; and enabling means for said secondary windings responsive to the setting of respective stages of said counter means for introducing said voltage increments to compensate for said deviation.