Thyristor module is the widely used power electrical components, has a good on-off, rectifier, voltage regulator, frequency, etc.
The working principle of thyristor
module and use what are, to do a detailed analysis for you.
Ordinary thyristor purpose is controlled rectifier.
The familiar diode rectifier circuit is controlled rectifier circuit.
If change the diode thyristor, can constitute a controllable rectifier circuit.
In the simplest of single-phase half-wave controlled rectifier circuit as an example, the sinusoidal ac voltage during the positive half cycle of U2, if VS control no input trigger Ug, VS still can't conduction, only in the U2 in the positive half cycle, in the control and trigger pulse when the Ug, triggered thyristor module conduction.
Draw its waveform (
, only in the trigger pulse Ug arrival, load on the RL is UL output voltage.
Ug come early, thyristor module conduction time is earlier;
Ug coming late, thyristor module guide is slower.
By changing the control trigger on Ug arrival time, you can adjust the average load on the output voltage of UL.
In the electrotechnics, often alternating current (ac) half cycle as 180 & deg;
, known as the electrical point of view.
In U2 are each half cycle, from zero to trigger Angle of arrival instant of electricity is called control Angle alpha;
In each thyristor module is half weeks conduction Angle of electric conduction Angle theta.
Obviously, the alpha and theta are used to represent thyristor module in the forward voltage under half cycle of the scope of the conduction or block.
By changing the control Angle alpha or conduction Angle theta, change the pulse dc voltage on load average UL, controlled rectifier is realized.
1: the small power encapsulation bidirectional thyristor (
Usually use silent electric lighting system.
Rated current: IA is less than 2 a.
The power requirments and iron sealing SCR (
Usually used as a power type controllable voltage regulation circuit.
Like adjustable voltage output dc power supply and so on.
3: high-power high-frequency thyristor (
Usually used for industry;
High frequency melting furnace, etc.
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If interested in our thyristor module or there is doubt, welcome your consultation.
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