Power line filter

A power line filter for attenuating normal mode noise appearing on a power line between a live line and a neutral line as well as common mode noise appearing between said power line and a ground line, comprising:

• a plurality of first inductors, at least one being disposed along said live line and at least one being disposed along said neutral line, wherein at least two of said first inductors form a balun coil and at least one of said first inductors comprises a choke coil,
• a first X-capacitor, interposed between said live line and said neutral line on a load side of said first inductors,
• a plurality of second inductors, at least one being disposed along said live line and at least one being disposed along said neutral line on a load side of said first X-capacitor, and
• a first Y-capacitor, interposed between said live line and said ground line, and a second Y-capacitor, interposed between said neutral line and said ground line, on a load side of said second inductors;
• said balun coil, said second inductors, and said Y-capacitors constituting one common mode filter, and said choke coil, said first X-capacitor, and said second inductors constituting one normal mode filter.

A power line filter for attenuating normal mode noise appearing on a power line between a live line and a neutral line as well as common mode noise appearing between said power line and a ground line, comprising:

• a plurality of first inductors, at least one being disposed along said live line and at least one being disposed along said neutral line,
• a first X-capacitor, interposed between said live line and said neutral line on a load side of said first inductors,
• a plurality of second inductors, at least one being disposed along said live line and at least on being disposed along said neutral line on a load side of said first X-capacitor, wherein at least two of second inductors form a balun coil and at least one of said second inductors comprises a choke coil, and
• a first Y-capacitor, interposed between said live line and said ground line, and a second Y-capacitor, interposed between said neutral line and said ground line, on a load side of said second inductors;
• said first inductors, said balun coil, and said Y-capacitors constituting one common mode filter, and said first inductors, said first X-capacitor, and said choke coil constituting one normal mode filter.

A power line filter for attenuating normal mode noise appearing on a power line between a live line and a neutral line as well as common mode noise appearing between said power line and a ground line, comprising:

• a first X-capacitor, interposed between said live line and said neutral line,
• a plurality of first inductors, at least one being disposed along said live line and at least one being disposed along said neutral line on a load side of said first X-capacitor,
• a second X-capacitor, interposed between said live line and said neutral line on a load side of said first inductors,
• a plurality of second inductors, at least one being disposed along said live line and at least one being disposed along said neutral line on a load side of said second X-capacitor, and
• a first Y-capacitor, interposed between said live line and said ground line, and a second Y-capacitor, interposed between said neutral line and said ground line, on a load side of said second inductors;
• said first inductors, said second inductors, and said Y-capacitors constituting one common mode filter, and said first X-capacitor, said first inductors, said second X-capacitor, and said second inductors constituting one normal mode filter.