Four key judge thyristor module

by:Positioning     2021-02-23
Thyristor module for a very important basic components in the circuit, it also has good and bad points, the stand or fall of appropriate or not is directly related to running the stand or fall of quality, so, the choose and buy thyristor module before it is very important to learn how to judge the stand or fall of thyristor, choose good thyristor module, can guarantee the quality of operation and performance. In fact, it is not difficult to judge thyristor module is whether it is in good condition, need to inspect and judge from four aspects: first is to determine the component of three p-n junction are in good condition; Second is the reverse connection between cathode and anode voltage can block conduction; And then when the control is very open, positive connection between the anode and cathode voltage nor conduction; The fourth one is to control combined with forward current, to the cathode and anode forward voltage, thyristor module should conduction, after remove the control current is still in the conduction state. Only can meet the above conditions, thyristor module can explain thyristor module is high quality. Judgment, of course, it is also very simple, only need to use a multimeter ohms range measuring electrode resistance of thyristor module. Specific approach is: use R× 1 k or R× 10 k block measurement between cathode and anode to resistance ( Control is extremely voltage) The both resistance should be large. The greater the resistance value, which indicates that the smaller the forward and reverse leakage current. If the measured resistance is low, or close to infinity, thyristor module have breakdown short circuit or open circuit, the thyristor module cannot be used. Followed by detecting the thyristor module of three p-n junction are in good condition or damaged, can use a multimeter R× 1 k or R× 10 k block anode measurement and control is extremely, the resistance between the positive and negative to the measured value shall be more than a few hundred thousand Europe, if the resistance is small that SCR breakdown short circuit. Use R× 1 k or R× 100 block, measuring control of anode and cathode of the PN junction between the positive and negative resistance in thousands of the left and right sides, such as a positive value is close to zero or infinity, show that the p-n junction between control pole and the cathode has been damaged. Reverse resistance should be very big, but not for infinity. Normal situation is reverse resistance significantly greater than positive value. Basically, by the above method could determine the stand or fall of thyristor module. Thyristor module, we use the most professional attitude, concern you the most subtle, want to think of the client, the urgent need of the client, in a very quality, fill and level up your fears. If you are interested in our SCR module or there is doubt, rectifier welcome your consultation. We wait for you!
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