ABSTRACT
The switch power supply because of having the light characteristics of small weight of efficient and high physical volume to acquired to fly to develop soon in recent years. It is the direction high frequency that it develop that high frequency of the switch power supply turn to make the switch power supply small scaled to turn and make the switch power supply enter more extensively applied realm, especially in the high new technique realm of applied pushed the high new technique product small scaled to turn easy and convenient turn. The thesis mainly with the semi-bridge alternating circuit for the switch power supply of main electric circuit design one direct current switch of the set good quality steady press the power supply.
Whether the switching stabilized voltage power supply works better or not mainly depends on the designing of the major transformer. It requires the transformer with higher efficiency and
Lower inductive leakage. The thesis designs the transformer carefully and calculates the leak resistance of the transformer.
There are several different introductions in different articles on the designing method of the filter circuit. It has strong applicability. The designing result using this method usually is satisfactory.
The thesis recounts the feature of the IGBT and the issues that should be considered as IGBT used. It distinguishes and discusses all kinds of fault phenomena in the there-phase full wave rectifying circuit.
Keywords: switching regulated DC power supply
semi-bridge alternating circuit