Circuit arrangement for establishing an energizing circuit for alternating current induction motors

Claim 2

A circuit arrangement for establishing an energizing circuit for an alternating current induction motor across a compatible alternating current supply potential source comprising in combination with a control circuit which produces a direct current electrical trigger signal during each potential half cycle of the alternating current supply potential; input circuit means across which an alternating current supply potential source may be connected; output circuit means across which an alternating current induction motor to be energized may be connected; first and second silicon controlled rectifiers each having anode, cathode and gate electrodes connected in parallel with each other in an opposite polarity relationship and in series with said output circuit means; a diode bridge type full wave rectifier circuit having two diodes in each the positive and negative polarity bank and the alternating current input circuit terminals thereof connected across said parallel combination of said first and second silicon controlled rectifiers; a resistor connected across the said gate-cathode electrodes of each of said first and second silicon controlled rectifiers and means for applying the said direct current electrical trigger signals produced by said control circuit across said negative output circuit terminal of said bridge rectifier circuit and the said alternating current input circuit terminals of said bridge rectifier circuit through respective resistors in parallel.

Claim 3

A circuit arrangement for establishing an energizing circuit for an alternating current induction motor across a compatible alternatiNg current supply potential source comprising in combination with a control circuit which produces a direct current electrical trigger signal during each potential half cycle of the alternating current supply potential; an alternating current supply potential source connected across associated input circuit means and a motor to be energized connected across associated output circuit means; first and second silicon controlled rectifiers each having anode, cathode and gate electrodes connected in parallel with each other in an opposite polarity relationship and in series with said motor to be energized; a diode bridge type full wave rectifier circuit having two diodes in each the positive and negative polarity bank and the alternating current input circuit terminals thereof connected across said parallel combination of said first and second silicon controlled rectifiers for supplying a direct current potential for said control circuit, a resistor connected across the said gate-cathode electrodes of each of said first and second silicon controlled rectifiers and means for applying the said direct current electrical trigger signals produced by said control circuit in a reverse polarity relationship across the conducting diode in said negative polarity bank of said bridge rectifier circuit through the said resistor connected across the said gate-cathode electrodes of the forward poled said silicon controlled rectifier to complete a circuit through which said trigger signals will produce current flow in a reverse direction through said diode and in a forward direction through said gate-cathode electrodes of said forward poled silicon controlled rectifier in series to render said forward poled silicon controlled rectifier conductive through the said anode-cathode electrodes thereof to complete an energizing circuit for said motor connected across said associated output circuit means.

Claim 4

A circuit arrangement for establishing an energizing circuit for an alternating current induction motor across a compatible alternatiNg current supply potential source comprising in combination with a control circuit which produces a direct current electrical trigger signal during each potential half cycle of the alternating current supply potential; an alternating current supply potential source connected across associated input circuit means and a motor to be energized connected across associated output circuit means; first and second silicon controlled rectifiers each having anode, cathode and gate electrodes connected in parallel with each other in an opposite polarity relationship and in series with said motor to be energized; a diode bridge type full wave rectifier circuit having two diodes in each the positive and negative polarity bank and the alternating current input circuit terminals thereof connected across said parallel combination of said first and second silicon controlled rectifiers for supplying a direct current potential for said control circuit, a resistor connected across the said gate-cathode electrodes of each of said first and second silicon controlled rectifiers and means for applying the said direct current electrical trigger signals produced by said control circuit in a reverse polarity relationship across the conducting diode in said negative polarity bank of said bridge rectifier circuit through the said resistor connected across the said gate-cathode electrodes of the forward poled said silicon controlled rectifier to complete a circuit through which said trigger signals will produce current flow in a reverse direction through said diode and in a forward direction through said gate-cathode electrodes of said forward poled silicon controlled rectifier in series to render said forward poled silicon controlled rectifier conductive through the said anode-cathode electrodes thereof to complete an energizing circuit for said motor connected across said associated output circuit means.

Claim 5

A circuit arrangement for establishing an energizing circuit for an alternating current induction motor across a compatible alternating current supply potential source comprising in combination with a control circuit which produces a direct current electrical trigger signal during each potential half cycle of the alternating current supply potential across positive and negative output circuit terminals thereof; input circuit means across which an alternating current supply potential source may be connected; output circuit means across which an alternating current induction motor to be energized may be connected; first and second silicon controlled rectifiers each having anode, cathode and gate electrodes; means for connecting said silicon controlled rectifiers in parallel with each other in an opposite polarity relationship; means for connecting said parallel combination of said first and second silicon controlled rectifiers in series with said output circuit means; a diode bridge type full wave rectifier circuit having two diodes in each the positive and negative polarity bank, alternating current input circuit terminals and positive and negative output circuit terminals for supplying a direct current potential for said control circuit, means for connecting said alternating current input circuit terminals of said bridge rectifier circuit across said parallel combination of said first and second silicon controlled rectifiers; first and second diodes; a resistor connected across the gate-cathode electrodes of each of said first and second silicon controlled rectifiers and means for connecting said positive output circuit terminal of said control circuit to one of said alternating current input circuit terminals of said bridge rectifier circuit through one of said diodes and one of said resistors in series and to the other one of said alternating current input circuit terminals of said bridge rectifier circuit through the other one of said diodes and the other one of said resistors in series and means for connecting said negative polarity output circuit terminal of said control circuit to said negAtive output circuit terminal of said bridge rectifier circuit.

Claim 6

A circuit arrangement for establishing an energizing circuit for an alternating current induction motor across a compatible alternating current supply potential source comprising in combination with a control circuit which produces a direct current electrical trigger signal during each potential half cycle of the alternating current supply potential across positive and negative output circuit terminals thereof; input circuit means across which an alternating current supply potential source may be connected; output circuit means across which an alternating current induction motor to be energized may be connected; first and second silicon controlled rectifiers each having anode, cathode and gate electrodes; means for connecting said silicon controlled rectifiers in parallel with each other in an opposite polarity relationship; means for connecting said parallel combination of said first and second silicon controlled rectifiers in series with said output circuit means; a diode bridge type full wave rectifier circuit having two diodes in each the positive and negative polarity bank, alternating current input circuit terminals and positive and negative output circuit terminals for supplying a direct current potential for said control circuit, means for connecting said alternating current input circuit terminals of said bridge rectifier circuit across said parallel combination of said first and second silicon controlled rectifiers; first and second diodes; a resistor connected across the gate-cathode electrodes of each of said first and second silicon controlled rectifiers and means for connecting said positive output circuit terminal of said control circuit to one of said alternating current input circuit terminals of said bridge rectifier circuit through one of said diodes and one of said resistors in series and to the other one of said alternating current input circuit terminals of said bridge rectifier circuit through the other one of said diodes and the other one of said resistors in series and means for connecting said negative polarity output circuit terminal of said control circuit to said negAtive output circuit terminal of said bridge rectifier circuit.