Industrial instrument power supply with a good switching power supply or transformer
Switching power supply, the reasons are as follows: 1. Switching power supply EMI circuit, you can make the instrument from the power grid harmonics, the output more accurate. 2. Switching power supply with lightning protection circuit, can minimize the thunderstorm damage to the instrument. 3. Switching power supply output voltage is more stable, and the transformer basically no regulator function. Please adopt!
Upstairs brother who understand the wrong, 1: switching power supply unless it is more expensive resonant switching power supply, or its interference than the general composition of the transformer circuit should be large, you look at the high-end audio Why not switch power ( There are special, open-loop resonant) 2: switching power supply so-called "anti-lightning) is only one or two varistors connected in parallel at the input, anti-lightning that is what way to see the lightning, the function is limited, this and the transformer The difference is not large, the transformer and the post-pole regulator circuit .3 transformer output voltage for the exchange, want to get a stable DC voltage output must be added to the circuit, so the regulator is more stable depends on your components and circuits, not switching power supply It must be better than the transformer.
I would like to say that the transformer is better than the switching power supply, but each has its own advantages and disadvantages, for the general instrument, I still recommend the use of genuine switching power supply, if it is very sensitive instrument, it is optional transformer circuit, or you will find There is interference.
Industrial instrument power supply with a good switching power supply or transformer, need to be determined according to the use of the situation.
Switching power supply and transformer power supply has its own advantages and strengths. In the case of large fluctuations in the power supply or industrial equipment is 24 hours long-term need to supply the case, the use of transformer power supply more reliable, because it is very skin and difficult to damage. The switching power supply is cheap, the use of low cost, power efficiency relative to the transformer power supply high. Not need long-term online work of industrial instruments, naturally use the switching power supply is better.
