Electromagnetic interference filter and method of manufacturing the same

An electromagnetic interference filter, comprising:

• a base core including a first base core and a second base core facing the first base core;
• a leg core including first and second leg cores disposed between the first base core and the second base core, the first and second leg cores facing each other;
• a bobbin part including first and second bobbins respectively surrounding the first and second leg cores and having a winding region;
• a winding coil part including first and second winding coils wound around winding regions of the first and second bobbins, respectively, and connected to a power supply, the first and second winding coils respectively providing magnetizing inductance and leakage inductance;
• and
• a central core disposed between the first and second leg cores to provide an inductance leakage path between the first and second base cores.

An electromagnetic interference filter, comprising:

• a base core;
• a winding coil part including first and second winding coils wound around both sides of the base core and connected to a power supply, the first and second winding coils respectively providing magnetizing inductance and leakage inductance;
• and
• a central core disposed between the first and second winding coils to provide an inductance leakage path between the first and second base cores.

A method of manufacturing an electromagnetic interference filter, comprising:

• preparing a base core including a first base core and a second base core facing the first base core and a leg core including first and second leg cores formed to face each other between the first base core and the second base core;
• forming a bobbin part including first and second bobbins respectively surrounding the first and second leg cores and having a winding region;
• forming a winding coil part by winding first and second winding coils around the winding regions of the respective first and second bobbins;
• and
• forming a central core between the first and second leg cores to provide an inductance leakage path between the first and second base cores.