The trigger signal voltage applied to the gate of the thyristor is generally A 4 10V B 12 18V C 220V

Summary. The normal operation of the thyristor requires a trigger signal to make it on, and the trigger signal is input from the gate so that a "knot" (i.e., pn junction) is formed between the gate and the cathode, and when the forward voltage between the gate and the cathode is greater than the reverse voltage between the gate and the anode, the pn junction will be broken down, resulting in an instantaneous high current to make the thyristor conductive. Therefore, the trigger signal between the gate and cathode is the main way to control the thyristor conduction.

At the same time, the connection allows the capacitance between the gate and cathode to be charged and the excitation signal is maintained to ensure that the thyristor always receives enough impulse current to turn on.

When the forward voltage between the gate and the cathode is greater than the reverse voltage between the gate and the anode, the PN junction will be broken down, resulting in an instantaneous high current to make the thyristor conductive. Therefore, the trigger signal connected between the gate and the cathode is the main way to control the thyristor conduction. At the same time, the connection allows the capacitance between the gate and cathode to be charged and the excitation signal is maintained to ensure that the thyristor always receives enough impulse current to turn on.

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When the forward voltage between the gate and the cathode is greater than the reverse voltage between the gate and the anode, the PN junction will be broken down, resulting in an instantaneous high current to make the thyristor conductive. Therefore, the trigger signal connected between the gate and the cathode is the main way to control the thyristor conduction. At the same time, the connection allows the capacitance between the gate and cathode to be charged and the excitation signal is maintained to ensure that the thyristor always receives enough impulse current to turn on.

Trigger a pulse signal.

It should have a sufficiently large voltage and current, and the trigger voltage amplitude is generally required to be Lingzhi 4 10V.

When the trigger circuit does not output the trigger pulse, the leakage voltage generated by the leakage current of the trigger circuit should be less than to avoid false triggering.

The trigger pulse should have a certain width to ensure that the thyristor is secured.

Reliable turn-on. The width of the trigger pulse is best taken from 20 to 40us.

The leading edge of the trigger pulse should be steep to ensure the accuracy of the trigger time, and the leading edge time is generally not more than 10us.

The trigger pulse should be synchronized with the main loop to ensure that the thyristors in the main circuit have equal conduction angles at each cycle.

The trigger signal should have a sufficient range of phase shifting, and the phase should be continuously adjustable.

A: cThere is a certain width.

Because the trigger slag swimming pulse has a certain width, it can effectively ensure that the thyristor can be used to rent the excitation tube, and the beam socks rely on conduction.

Where is the trigger signal of the thyristor connected? The control signal added by the thyristor from the cut-off to the conduction on the gate is called the trigger signal, which can be a DC signal, an AC signal or a pulse signal, and the trigger signal in the form of a pulse is generally used. The basic requirements of thyristors for trigger circuits are:

1) The trigger signal should have sufficient power, generally requiring the trigger voltage to be 4 10V, and the trigger current to be tens to hundreds of milliamps.

2) The pulse stool punch should be of a certain width, and the pulse front should be as steep as possible, so that after the device is triggered to turn on, the anode current can quickly rise beyond the holding current and maintain the conduction.

3) The trigger pulse must be synchronized with the anode voltage of the thyristor, and the pulse phase shift range must meet the circuit requirements.

4) It has the ability to resist interference, and when it is not triggered, the output voltage (i.e., leakage voltage) of the trigger circuit should be less than.

The electrical angle from which the thyristor is subjected to the positive anode voltage from the beginning of the thyristor to the application of the trigger pulse stop is called ().

Correct answer: Touching the letter to stop the hair horn.

When the thyristor is desensitized to the positive anode voltage, it will only be opened under the bridge circle when () has the current generated by the contact branch.

Correct Answer: Gate pole.

The thyristor controls the electrode voltage, which requires that the forward voltage and the reverse voltage are not silver shouting more than () front v.

5 and 1010 and 10

5 and 510 and 5 (correct answer).