Thyristor control device

A rectifying bridge, comprising:

• a first branch and a second branch connected in parallel between a first internal node of the rectifying bridge and a second internal node of the rectifying bridge;
• wherein the first branch includes a first thyristor comprising a cathode connected to a first input node of the rectifying bridge, and an anode connected to the first internal node;
• wherein the second branch includes a second thyristor comprising a cathode connected to a second input node of the rectifying bridge, and an anode connected to the first internal node;
• and
• a control device, comprising:
• a triac;
• and
• a first diode series-connected between the triac and a first terminal of the control device, wherein the first terminal is configured to be connected to a cathode gate of the first thyristor;
• wherein a second terminal of the control device is configured to be connected to anodes of the first thyristor and second thyristor and the first internal node;
• wherein the triac has a gate connected to a third terminal of the control device that is configured to receive a control signal;
• and
• a second diode series-connected between the triac and a fourth terminal of the control device, wherein the fourth terminal is configured to be connected to a cathode gate of the second thyristor.

A control device for controlling a thyristor, comprising:

• a first terminal configured to be connected to a cathode gate of the thyristor;
• a second terminal configured to be connected to an anode of the thyristor;
• a third terminal configured to receive a control signal generated by a control circuit;
• a triac having a first conduction terminal, a second conduction terminal directly connected to the second terminal, and a gate configured to receive a control signal;
• and
• a first diode having an anode directly connected to the first conduction terminal of the triac and a cathode directly connected to the first terminal.

A rectifying bridge, comprising:

• a first branch and a second branch connected in parallel between a first internal node of the rectifying bridge and a second internal node of the rectifying bridge;
• wherein the first branch includes a first thyristor comprising a cathode connected to a first input node of the rectifying bridge, and an anode connected to the first internal node;
• wherein the second branch includes a second thyristor comprising a cathode connected to a second input node of the rectifying bridge, and an anode connected to the first internal node;
• and
• a control device, comprising:
• a first terminal directly connected to a cathode gate of the first thyristor;
• a second terminal directly connected to the first internal node;
• a third terminal configured to receive a control signal generated by a control circuit;
• a fourth terminal directly connected to a cathode gate of the second thyristor;
• a triac having a first conduction terminal, a second conduction terminal directly connected to the second terminal, and a gate configured to receive a control signal;
• a first diode having an anode directly connected to the first conduction terminal of the triac and a cathode directly connected to the first terminal;
• and
• a second diode having an anode directly connected to the first conduction terminal of the triac and a cathode directly connected to the fourth terminal.