Neighborhoods! Control transformer and switching power supply of the difference, for occasions, advantages and disadvantages
Switching power supply is easy to damage because the switching power supply is a comprehensive manufacturing of electronic products, its overload capacity and over-current capacity are relatively poor, but the quality of the components, however, is easy to damage, like color TV switching power supply, but also multiple failures. Especially in industrial electrical equipment, because the equipment running a long time, the failure rate is relatively high. But the power grid voltage fluctuations are not, because the current switching power supply is mostly wide power supply design. The fluctuation of the grid voltage can only affect the output voltage of the control transformer.
Control transformer output for multiple groups of AC, usually AC: 36v, 24v, 12v, 6.3v, mainly for the lathe control system and some other need 36v coil voltage control occasions; switching power supply also has multiple output, but the output is After the DC voltage regulator, usually DC: 48v, 24v, 12v, 5v, 3.3v, etc., mainly used for some need more than one DC power supply place, such as: the computer power supply is more than one group of DC output switching power supply, It has 12v, 5v, -5v, 3.3v and other sets of output; electric bicycle battery charger is the switching power supply, usually the output DC voltage of 48v DC, used to charge the battery, there are 24v.
In the industrial electrical equipment in the control transformer is the primary two-phase AC (AC380V) secondary output 220V or 36V, 24V, 12V AC power frequency transformer, mainly for the AC contactor and drive the use of small AC winding relays.
Switching power supply is input AC220V output is required according to the different output DC voltage, in the industrial electrical equipment control circuit is mainly used for the control circuit and relay power supply. Switching power supply output voltage is stable but poor reliability, control transformer life is long but the output voltage by the power grid voltage, the two different principles of the use of different purposes can not be replaced, can not compare advantages and disadvantages.
