| 摘要 |
PURPOSE: An apparatus for supplying power for a communication device is provided to comprise a transformer outputting an AC(Alternating current), and a converter converting the outputted AC into a DC(Direct Current) to output the DC. CONSTITUTION: A transformer(100) comprises as follows. Input terminals of transformers(T1,T2,T3) receiving a three-phase alternating current are wired in a delta type. Output terminals of diodes(D1,D2,D3) are wired in a Y type. The diodes(D1,D2,D3) are connected to the output terminal of the transformers(T1,T2,T3) in parallel to form a path of a current stream. A low-pass filter(200) comprises as follows. An inductor(L1) is connected with one terminal of the transformer(T1,T2,T3) output terminals. A capacitor(C1) is connected between other terminal of the inductor(L1) and other terminal of the transformer(T1,T2,T3) output terminals. A converter(300) comprises as follows. A drain of a transistor(M1) is connected with a common terminal of the inductor(L1) and the capacitor(C1). A cathode of a diode(D4) is connected to a source of the transistor(M1). An Anode of the diode(D4) is connected with a common terminal of the capacitor(C1) and the transformer(T1,T2,T3) output terminals. One end of an inductor(L2) is connected with a common terminal of the source of the transistor(M1) and the cathode of the diode(D4). A capacitor(C2) is connected between other terminal of the inductor(L1), and a common terminal of the diode(D4) and the capacitor(C1). An anode of a diode(D5) is connected with a common terminal of the inductor(L2) and the capacitor(C2). A battery(400) is connected between the common terminals of the capacitor(C1), the diode(D4), and the capacitor(C2) and a cathode of the diode(D5).
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