Thyristor module because of the advantages of small volume, light weight and high reliability and is enjoyed by the masses, but, in the actual application, silicon controlled module sometimes out of control because of various reasons, so, what are the causes of thyristor
module is out of control?
First of all, the first reason, may be the forward blocking thyristor module force is reduced, such as in everyday use, thyristor module was not for long, at the same time, and because of the bad sealing is likely to be affected with damp be affected with damp, in this case the forward blocking ability will reduce, if reduced to below the secondary voltage of rectifier transformer, thyristor module could be out of control.
The second reason is often thyristor module to maintain current in the circuit is too small, because the generator rotor is give priority to high current load inductance, for half controlled bridge, after zero voltage, electric current is not zero, even if half controlled bridge has stream tube in inductance load side, but if stream pipe of the pressure drop is higher than the pipe pressure drop of the conduction of thyristor module, on the inductance current besides most from stream pipe flow, still there will be a part of the current flows in the conduction of the thyristor module.
Thyristor module control caused the third reason is that in a circuit system under the premise of normal operation, if the three-phase pulse is normal, even to maintain current is very small, thyristor can also ensure the normal phase, there will not be out of control, however, if the pulse condition, they cannot guarantee the normal phase SCR module, component itself may be out of control.
That's three possible cause of the thyristor module is out of control, is affect the normal use of the key elements of thyristor module, hope everybody can pay attention to.
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