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Thyristor

Thyristor

Product description introduction: Thyristor can work bai in the DC circuit du or in the AC circuit. But when it is used in the zhi DC circuit, once it is triggered, even if the dao trigger voltage disappears, only the voltage between the anode and the cathode exists, and it is still in the conducting state. The triode must be used in a DC-powered circuit, which is determined by its characteristics. It can be in an amplified state and used in analog circuits. It can also only be in saturated on and off states for use in switching circuits or digital circuits.

Product Details

product description:

The thyristor can work in the DC circuit du or in the AC circuit. But when it is used in the zhi DC circuit, once it is triggered, even if the dao trigger voltage disappears, only the voltage between the anode and the cathode exists, and it is still in the conducting state.

The triode must be used in a DC-powered circuit, which is determined by its characteristics. It can be in an amplified state and used in analog circuits. It can also only be in saturated on and off states for use in switching circuits or digital circuits.

Thyristor, there are two reverse PN junctions between the anode and the cathode, and the resistance is extremely large when measured with a meter; only the gate and the cathode are PN junctions, and the resistance between the positive and negative sides is very different; as long as the electrodes meet this phenomenon, it is Thyristor too.

For the triode, the base is a PN junction to the other two poles. When you use the meter to cycle and measure that a certain electrode can show low or high resistance to the other two poles, you can basically conclude that it is a triode.

Features:

Commonly used are resistance-capacitance shift phase bridge trigger circuit, single-junction transistor trigger circuit, transistor trigger circuit, and small thyristor trigger large thyristor trigger circuit.

1. Rated on-state average current Under certain conditions, the average value of 50 Hz sine wave half-wave current continuously passes between the positive and negative poles.

2. When the control electrode is open and the anode forward voltage is not greater than the turn-on voltage, the forward blocking peak voltage VPF can be repeatedly applied to both ends of the thyristor. The peak value of the forward voltage of the thyristor should not exceed the parameter value given in the manual.

3. Reverse blocking peak voltage Vpr When the thyristor is in the reverse off state and a reverse voltage is applied, the reverse peak voltage applied to both ends of the thyristor can be repeated. When used, it should not exceed the parameter value given in the manual.

4. Trigger voltage VGT——Under the specified ambient temperature, a certain voltage is applied between the positive and negative electrodes to make the SCR change from the off state to the on state of the minimum control electrode current and voltage.

5. Maintain current ih When the control electrode is opened at a specified temperature, the minimum anode forward current required to maintain the thyristor to turn on. Many new types of thyristors have come out, such as fast thyristors suitable for high-frequency applications, bidirectional thyristors that use positive and negative trigger signals to control bidirectional conduction, turn on with positive trigger signals, and turn off thyristors with negative trigger signals.


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