Filter circuit for coupling between alternating current voltage source and power pulse current converter circuit, has first and third inductors arranged on same leg of one common iron core and are wound together and are interconnected

摘要

The filter circuit has first input terminal connected to first inductor (L2). A second inductor (L1) is connected in series with first inductor and with output terminal. One of several nodes is connected between first inductor, second inductor and third inductor (L3). The first and third inductors are arranged on the same leg of one common iron core and are wound together and are interconnected, so that the directions of magnetic flux of current flowing through first inductor and third inductors are directed way from one another.