SYSTEM AND METHOD FOR SUPPRESSING CAPACITIVE CURRENT AND POWER SUPPLY HAVING THIS SYSTEM

摘要

PURPOSE: To provide the method and device which suppress the capacitive current of a transformer. CONSTITUTION: Winding of the transformer consists of two identical winding half bodies 30 and 40, which are wound in a serial assist shape. Two conductors 60 and 70 are led out of the center point of the winding to which the two half bodies are connected in series. The center point is constant in potential difference throughout the switching cycle of the transformer. Capacitive currents of the input and output conductors 10 and 20 of the transformer are suppressed by introducing common-mode impedance to the respective conductors and a corresponding center tap conductor. Toroids 80 and 90 of magnetic materials, to which the common-mode impedance is introduced, are arranged very close to the conductor couple for suppressing the capacitive currents by the coupling between the conductors and the magnetic materials.