Harmonic mitigating method and apparatus

An apparatus for mitigating harmonic currents generated by a load connected to a power distribution source via a supply line, the apparatus comprising:

• at least one magnetic core including a first core;
• first and second line windings in series between a supply line and the load such that the first and second line windings are disposed on the first core so as to have the same polarity;
• and
• at least one trap circuit including a series linked capacitor and trap winding linked to an intermediate node between the first and second line windings with an output connected to a second line, the trap winding disposed on the at least one core;
• wherein, a reactance to harmonic currents between the load and the source is increased by the summation of fluxes generated by the line windings and a selected portion of the harmonic currents is diverted through the trap circuit.

A method for mitigating harmonic currents generated by a load connected to a power distribution source via a supply line, the method comprising the steps of:

• providing first and second magnetic cores;
• providing first and second series line windings linked between the supply line and the load;
• and
• providing at least one trap circuit including a series linked capacitor and trap winding linked at an intermediate node between the first and second line windings and an output connected to a second line;
• disposing the first and trap windings on the first magnetic core and the second winding on the second core.

A method for mitigating harmonic currents generated by a load connected to a power distribution source, the method comprising the steps of:

• providing at least one magnetic core including a first core;
• providing first and second line windings and a trap winding;
• disposing the first and second windings on the first core so as to have the same polarity;
• linking the first and second line windings in series between a supply line and the load;
• disposing the trap winding on the at least one core;
• and
• linking the trap winding to an intermediate node between the first and second line windings with an output linked to a second line;
• wherein, a reactance between the load and the source is increased by the summation of fluxes generated by the line windings and a selected portion of the harmonic currents is diverted through the trap circuit.

An apparatus for mitigating harmonic currents generated by a load connected to a power distribution source, the apparatus comprising:

• a single magnetic core;
• first and second series line windings disposed on the core, the first winding linked to the source and the second winding linked to the load, the first and second line windings disposed such that the first and second windings have the same polarity;
• and
• at least one trap circuit including a series linked capacitor and trap winding linked at an intermediate node between the first and second line windings and an output connected to a second line;
• wherein, a reactance between the load and the source is increased by the summation of fluxes generated by the line windings and a selected portion of the harmonic currents is diverted through the trap circuit.