Gate-cathode power supply for a cycloconverter network of silicon controlled rectifiers

Claim 2

A gate-cathode power supply for a cycloconverter network of silicon controlled rectifiers, through which the phase windings of a three-phase alternating current motor may be cyclically energized by a source of three-phase alternating current motor supply potential, comprising in combination with a cycloconverter network of silicon controlled rectifiers, each having anode, cathode and gate electrodes, of the type having three positive polarity common anode silicon controlled rectifiers and three negtive polarity common cathode silicon controlled rectifiers for each phase of the motor supply potential arranged in groups of three common anode silicon controlled rectifiers per group, the silicon controlled rectifiers of each of these groups supplying energizing current to the same motor phase winding from the source of motor supply potential, and in groups of three common cathode silicon controlled rectifiers per group, the silicon controlled rectifiers of each of these groups returning energizing current from the same motor phase winding to the source of motor supply potential; a source of three-phase alternating current gate-cathode power supply potential, each of the phases of which is in phase with a corresponding phase of said motor supply potential; means for inverting and combining the potential of each two phases of said gate-cathode power supply and producing three separate first positive polarity direct current gate-cathode power potential pulses, each corresponding to the phase of said motor supply potential to which the other phase corresponds, for each said group of three common anode silicon controlled rectifiers for supplying gatecathode power or each of said group of three common anode silicon controlled rectifiers; and means for combining the potential of each two phases of said gate cathode power supply and producing three separate second positive polarity direct current gatecathode power potential pulses, each corresponding to the phase of said motor supply potential to which the other phase corresponds, for supplying gate-cathode power for said three common cathode silicon controlled rectifiers for the phase of said motor supply poteNtial to which it corresponds.

Claim 3

A gate-cathode power supply for a cycloconverter network of silicon controlled rectifiers, through which the phase windings of a three-phase alternating current motor may by cyclically energized by a source of three-phase alternating current motor supply potential, comprising in combination with a cycloconverter network of silicon controlled rectifiers, each having anode, cathode and gate electrodes, of the type having three positive polarity common anode silicon controlled rectifiers and three negative polarity common cathode silicon controlled rectifiers for each phase of the motor supply potential arranged in groups of three common anode silicon controlled rectifier per group, the silicon controlled rectifiers for each of these groups supplying energizing current to the same motor phase winding from the source of motor supply potential, and in groups of three common cathode silicon controlled rectifiers per group, the silicon controlled rectifiers of each of these groups returning energizing current from the same motor phase winding to the source of motor supply potential; a source of three-phase alternating current gate-cathode power supply potential, each of the phases of which is in phase with a corresponding phase of said motor supply potential; means for inverting and combining the potential of each two phases of said gate-cathode power supply and producing these separate first positive polarity direct current gate-cathode power potential pulses, each corresponding to the phase of said motor supply potential to which the other phase corresponds, for each said group of three common anode silicon controlled rectifiers, means for applying each of said first positive polarity direct current gate-cathode power potential pulses for each said group of three common anode silicon controlled rectifiers across said gate-cathode electrodes of the said common anode silicon controlled rectifier for the phase of said motor supply potential to which it corresponds; means for combining the potential of each two phases of said gate cathode power supply and producing three separate second positive polarity direct current gate-catode power potential pulses, each corresponding to the phase of said motor supply potential to which the other phase corresponds; and means for applying each of said second positive polarity direct current gate-cathode power potential pulses across said gate-cathode electrodes of the said three common cathode silicon controlled rectifiers for the phase of said motor supply potential to which it corresponds.

Claim 4

A gate-cathode power supply for a cycloconverter network of silicon controlled rectifiers, through which the phase windings of a three-phase alternating current motor may by cyclically energized by a source of three-phase alternating current motor supply potential, comprising in combination with a cycloconverter network of silicon controlled rectifiers, each having anode, cathode and gate electrodes, of the type having three positive polarity common anode silicon controlled rectifiers and three negative polarity common cathode silicon controlled rectifiers for each phase of the motor supply potential arranged in groups of three common anode silicon controlled rectifier per group, the silicon controlled rectifiers for each of these groups supplying energizing current to the same motor phase winding from the source of motor supply potential, and in groups of three common cathode silicon controlled rectifiers per group, the silicon controlled rectifiers of each of these groups returning energizing current from the same motor phase winding to the source of motor supply potential; a source of three-phase alternating current gate-cathode power supply potential, each of the phases of which is in phase with a corresponding phase of said motor supply potential; means for inverting and combining the potential of each two phases of said gate-cathode power supply and producing these separate first positive polarity direct current gate-cathode power potential pulses, each corresponding to the phase of said motor supply potential to which the other phase corresponds, for each said group of three common anode silicon controlled rectifiers, means for applying each of said first positive polarity direct current gate-cathode power potential pulses for each said group of three common anode silicon controlled rectifiers across said gate-cathode electrodes of the said common anode silicon controlled rectifier for the phase of said motor supply potential to which it corresponds; means for combining the potential of each two phases of said gate cathode power supply and producing three separate second positive polarity direct current gate-catode power potential pulses, each corresponding to the phase of said motor supply potential to which the other phase corresponds; and means for applying each of said second positive polarity direct current gate-cathode power potential pulses across said gate-cathode electrodes of the said three common cathode silicon controlled rectifiers for the phase of said motor supply potential to which it corresponds.

Claim 5

A gate-cathode power supply for a cycloconverter network of silicon controlled rectifiers, through which the phase windings of a three-phase alternating current motor may be cyclically energized by a source of three phase alternating current motor supply potential, comprising in combination with a cycloconverter network of silicon controlled rectifiers, each having anode, cathode and gate electrodes, of the type having three positive polarity common anode silicon controlled rectifiers and three negative polarity common cathode silicon controlled rectifiers for each phase of the motor supply potential arranged in groups of three common anode silicon controlled rectifiers per group, the silicon controlled rectifiers of each of these groups supplying energizing current to the same motor phase winding from the source of motor supply potential, and in groups of three common cathode silicon controlled rectifiers per group, the silicon controlled rectifiers fo each of these groups returning energizing current from the same motor phase winding to the source of motor supply potential; a source of three-phase alternating current gate-cathode power supply potential, each of the phases of which is in phase with a corresponding phase of said motor supply potential; a three-phase transformer having a three-phase primary winding, across which said three-phase alternating current gate-cathode power supply potential is applied, three wye coNnected secondary winding groups, each for inventing and combining the potential of each two phases of said gate-cathode power supply, and three series connected secondary winding pairs, each for combining the potential of two different phases of said gate-cathode power supply potential, means for rectifying each said inverted and combined potential of each two phases of said gate-cathode power supply potential of each said wye connected secondary winding group for producing three separate first positive polarity direct current gate-cathode power potential pulses, each corresponding to the phase of said motor supply potential to which the other phase corresponds; means for rectifying each said combined potential on each two phases of said gate-cathode power supply for producing three separate second positive polarity direct current gate-cathode power potential pulses, each corresponding to the phase of said motor supply potential to which the other phase corresponds; means for applying each of sad first positive polarity direct current gate-cathode power potential pulses for each said group of three common anode silicon controlled rectifiers across said gate-cathode electrodes of the said common anode silicon controlled rectifier for the phase of said motor supply potential to which it corresponds; and means for applying each of said second positive polarity direct current gate-cathode power potential pulses across said gate-cathode electrodes of the said three common cathode silicon controlled rectifiers for the phase of said motor supply potential to which it corresponds.

Claim 6

A gate-cathode power supply for a cycloconverter network of silicon controlled rectifiers, through which the phase windings of a three-phase alternating current motor may be cyclically energized by a source of three phase alternating current motor supply potential, comprising in combination with a cycloconverter network of silicon controlled rectifiers, each having anode, cathode and gate electrodes, of the type having three positive polarity common anode silicon controlled rectifiers and three negative polarity common cathode silicon controlled rectifiers for each phase of the motor supply potential arranged in groups of three common anode silicon controlled rectifiers per group, the silicon controlled rectifiers of each of these groups supplying energizing current to the same motor phase winding from the source of motor supply potential, and in groups of three common cathode silicon controlled rectifiers per group, the silicon controlled rectifiers fo each of these groups returning energizing current from the same motor phase winding to the source of motor supply potential; a source of three-phase alternating current gate-cathode power supply potential, each of the phases of which is in phase with a corresponding phase of said motor supply potential; a three-phase transformer having a three-phase primary winding, across which said three-phase alternating current gate-cathode power supply potential is applied, three wye coNnected secondary winding groups, each for inventing and combining the potential of each two phases of said gate-cathode power supply, and three series connected secondary winding pairs, each for combining the potential of two different phases of said gate-cathode power supply potential, means for rectifying each said inverted and combined potential of each two phases of said gate-cathode power supply potential of each said wye connected secondary winding group for producing three separate first positive polarity direct current gate-cathode power potential pulses, each corresponding to the phase of said motor supply potential to which the other phase corresponds; means for rectifying each said combined potential on each two phases of said gate-cathode power supply for producing three separate second positive polarity direct current gate-cathode power potential pulses, each corresponding to the phase of said motor supply potential to which the other phase corresponds; means for applying each of sad first positive polarity direct current gate-cathode power potential pulses for each said group of three common anode silicon controlled rectifiers across said gate-cathode electrodes of the said common anode silicon controlled rectifier for the phase of said motor supply potential to which it corresponds; and means for applying each of said second positive polarity direct current gate-cathode power potential pulses across said gate-cathode electrodes of the said three common cathode silicon controlled rectifiers for the phase of said motor supply potential to which it corresponds.