Today, with the awareness of energy conservation and environmental protection gradually increases, MT thyristor
module used in all walks of life;
So MT thyristor module in the application of what are the cause of the damage?
Below by silicon controlled thyristor manufacturers to introduce: 1, the over-voltage breakdown: over-voltage breakdown MT silicon controlled rectifier module is one of the main reasons for the breakdown, SCR capacity of overpressure is almost have no time, even in a short period of time a few milliseconds over voltage will be breakdown, so the practical application circuit, on both ends of MT thyristor module must be connected to the RC absorption circuit, in order to avoid various instantaneous overvoltage caused by the interference of random pulse.
If the SCR module breakdown happens often, please check the absorption circuit various components for burn out or fail.
2, overcurrent and overheating breakdown: actually flow breakdown and overheat breakdown is the same thing.
Breakdown is current flow through the MT thyristor module thermal effect when the chip inside the chip, the chip temperature, when the temperature reaches 175 ℃ chip will be invalid and cannot be restored.
Under normal conditions of use, as long as the working current shall not exceed the rated current thyristor is not going to happen this kind of thermal breakdown, because the flow principle of breakdown is caused by temperature, and temperature rise process needs a certain time, so the flow in a short time (
A few hundred milliseconds to several seconds)
Is generally not breakdown.
3, overheat breakdown: overheat breakdown here refers to the working current is not more than MT thyristor module under the condition of rated current and thermal breakdown, the cause of the breakdown occurred mainly thyristor module of auxiliary cooling device working poor caused by MT thyristor module chip temperature lead to breakdown.
For the water, however, work, mainly check whether the water temperature is too high (
General requirements water temperature should be below 25 ℃, but the highest no more than 35 ℃)
The flow adequacy;
To use air cooling way of working, should check whether the fan revolution is normal, and the environment temperature is not too high, but neither air cooling or water cooling, if you are replacing SCR just replace the chip, when installation should pay attention to the contact area between the chip and heat sink must assure good contact, contact surface to smooth, cannot have scratches or place into the concave and convex and can not have dust, to ensure adequate and uniform pressure, especially in silicon controlled water-cooled, three tensile strength of the bolt must be uniform, and regularly check and clean up the scale, scale too much can affect the cooling effect lead to breakdown of overheating.
In addition if multiple replacement chips will also influence the result of the radiator surface deformation and heat dissipation effect, if only on your machine breakdown and thyristor module often find other cause, when you should consider replacing SCR, together with the radiator replacement together.
Welcome to visit website more about thyristor knowledge.
MT if interested in our MT thyristor module or there is doubt, welcome your consultation.
Yangzhou Positioning Tech. Co., Ltd, as well, confirms that consumers who want ethically produced goods do the work of looking for them.
Yangzhou Positioning Tech. Co., Ltd is a professional manufacturer of offering some of the best in class custom rectifier solutions to global market. Click Positioning Thyristors to learn more.
Like anything else in silicon rectifier, there are a variety of choices and types to choose from, and each of them will affect your budget in some form. Yangzhou Positioning Tech. Co., Ltd offers a range of quality at competitive prices.