Recently to be an automatic lift, switching power supply with the touch mode control and found that sometimes failure, into the frequency transformer is not the problem, the problem is only with the switching power supply, would like to ask if there is nothing to improve this Problem? Switching power supply is bought directly outside the back. There is not much change
Plus 4700 microfarads and 104.103.10p capacitors at the output and the input of your control circuit board
In the touch of the power input side of the string into a 10 ohm or so resistance, put a 220 micro capacitor before the capacitor, put two 104.103, but also the resistance into inductance.
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This is obviously the switching power supply caused by high-frequency radiation interference program crash. I've done it before. That is often said that the electromagnetic compatibility issues. Market switching power supply in order to save the cost of most do not do EMI treatment, so the interference is very serious. You can buy that kind of high-end switching power supply effect will be better. If their own solution, it may not be able to solve, but can proceed from below. Can be in the switching power supply line plus CLC filter, that is, plus X capacitor and Y capacitor and common mode inductance. You can also increase the filter capacitor at the output and add multi-level LC filter, note that L is the kind of core inductance. There is also a key thing to deal with is the high-frequency transformer, you can use copper waves to wrap it up, reduce radiation, increase the shielding layer. In addition can switch the power supply as a whole sealed in a metal box can also play a very good shielding effect, reduce the radiation on the surrounding industrial computer and chip interference.
