CONTROL CIRCUIT OF A TRIAC OR A THYRISTOR
The present disclosure relates to a control circuit of a triac or thyristor having its driving reference terminal connected to a first reference node and coupled to a voltage rectifier comprising at least a semiconductor device connected between the first reference node and a second reference node of the control circuit comprising: a first bipolar transistor; and a driving circuit of the first transistor referenced to the second reference node.
1 . A circuit comprising:
a voltage rectifier assembly;
at least a triac or a thyristor having its driving reference terminal connected to a first reference node and coupled in series with one of a semiconductor device of the voltage rectifier assembly comprising at least the semiconductor device which is connected between the first reference node and a second reference node of the control circuit;
at least one control circuit of the triac or thyristor comprising:
a first transistor; and
a driving circuit of the first transistor referenced to the second reference node.
2 . The circuit of claim 1 , wherein when the at least one control circuit is a triac control circuit, and the first bipolar transistor is a bipolar transistor of a NPN type.
3 . The circuit of claim 2 , wherein when the at least one control circuit is a thyristor control circuit, and the first bipolar transistor is a bipolar transistor of a PNP type.
4 . The circuit of claim 1 , wherein the semiconductor device is a first diode whose anode is connected to the second reference input node.
5 . The circuit of claim 1 , wherein the semiconductor device is a MOS type transistor.
6 . The circuit of claim 1 , wherein the semiconductor device is an assembly comprising an IGBT type transistor connected in antiparallel with a diode or a second reverse-conducting IGBT type transistor.
7 . The circuit of claim 1 , wherein, when the at least one control circuit is a triac control circuit, the driving circuit comprises a Zener-type diode coupling a base of the first bipolar transistor to a first conduction terminal of the first bipolar transistor.
8 . The circuit of claim 1 , wherein the at least one control circuit is a control circuit of at least two triacs or one thyristor and at least one triac.
9 . The circuit of claim 1 , wherein the at least one control circuit is configured to be controlled by a processor.
10 . The circuit of claim 1 , wherein the assembly comprises a first input node and a second reference input node, between which an AC voltage is applied.
11 . The circuit of claim 1 further comprising a power factor correction circuit.
12 . The circuit of claim 1 , wherein a third diode is coupled in series between a gate of the triac or the thyristor and a collector of the first transistor of the at least one control circuit of the triac or thyristor.
13 . The circuit of claim 10 , wherein the AC voltage is a three phases AC voltage.
14 . A supply circuit of a motor supplying a three-phase voltage comprising the circuit of 1.
15 . The supply circuit of claim 14 further comprising a processor configured to drive the at least one control circuit.