Tell you about the six main parameters of thyristor

Commonly used thyristors include resistance-capacitance phase-shift bridge trigger circuits, single-junction transistor trigger circuits, transistor trigger circuits, trigger circuits that use small thyristors to trigger large thyristors, and so on.

The main parameters of silicon controlled silicon are:

1. Rated average on-state current IT is the average value of the 50 Hz sine half-wave current that can continuously pass between the anode and the cathode under certain conditions.

2. Forward blocking peak voltage VPF. When the control electrode is open and no trigger signal is applied, and the anode forward voltage has not exceeded the conduction voltage, the forward peak voltage can be repeatedly applied to both ends of the thyristor. The forward voltage peak value that the thyristor can withstand cannot exceed the parameter value given in the manual.

3. Reverse blocking peak voltage VPR. When reverse voltage is applied to the thyristor and it is in the reverse shutdown state, the reverse peak voltage can be repeatedly applied to both ends of the thyristor. When used, the parameter value given in the manual cannot be exceeded.

4. Control electrode trigger current Ig1, trigger voltage VGT. At the specified ambient temperature, when a certain voltage is applied between the anode and the cathode, the small control electrode current and Voltage.

5. To maintain the current IH at the specified temperature, the control electrode is open and the small anode forward current necessary to maintain the conduction of the thyristor is maintained. Many new thyristor components have come out one after another, such as fast thyristors suitable for high-frequency applications, bidirectional thyristors that can be controlled in two directions by positive or negative trigger signals, and can be turned on by positive trigger signals. , a thyristor that turns off with a negative trigger signal, etc.