1 Power transformer USES a step-down transformer, the power grid voltage 220 V transform into need ac voltage. The ac voltage after rectification, can obtain electronic equipment need dc voltage.
2The design of the rectifier circuit big filter capacitance, so the power of the instantaneous large current power supply features, little noise and reaction speed, output ripple small.
3The filter circuit capactance filtering circuit, will the pulsation of the rectifier circuit output filter out most of the ingredients from a smooth direct current. This circuit adopts the 3300 u F / 100 V large capacitance C3, C4 output voltage more smooth, the power supply characteristics moment, suitable for take perceptual load
4By LM317 output voltage circuit is power, LM337 output negative supply. LM317 and LM337 are used internal thermal overload, contains over current protection, hot off and safety working area compensation of perfect protection circuit, makes the power supply can save the fuse, and so easy loss device.
Regulating circuit: to meet the needs of the different application situation and the voltage is set to can be adjusted. Output voltage calculation Uo = 1.25 by (1 + Rf/R), can choose precision resistor adjustable resistance, guarantee the precise output voltage can be adjusted.
5The protection circuit for linear power supply heat bigger, so the power to add enough radiator. Due to the high performance integrated circuits, which can simplify the circuit structure, highlight the power transformation of the key part of the problem. Through the commissioning and testing, circuit performance is good. The power not only can be used alone, also can be in other electronic equipment used in voltage or current stabilization source use
Keywords: dc power rectifier circuit voltage filter circuit circuit protection circuit
追问本直流电源由电源、滤波、保护、稳压等四个基本模块组成.这句也帮忙翻译一下可以吗?太感谢了
追答The dc power supply by power supply, filtering, protection, voltage stabilizer and so on four basic modules