Common mode and differential mode filter for an inverter and inverter comprising such filter
AssigneeABB Schweiz AG
InventorFabio Tombelli
Life of this patent
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Abstract
A differential and common mode filter for an inverter, comprising an inductor having a core. The core comprises: an upper yoke and a lower yoke which comprise a first magnetic material; a first leg, a second leg and a third leg which extend between the upper and lower yokes and around which a first coil, a second coil, and a third coil are arranged, respectively, wherein at least one portion of the first, second and third legs, when seen in a transverse cross section, is made of one second magnetic material, and wherein the first magnetic material has a magnetic permeability higher than the second magnetic material; at least one unwound leg extending between the upper and lower yokes.
Claims15
A differential and common mode filter for an inverter, comprising an inductor having a core, said core comprises:
- an upper yoke and a lower yoke which comprise a first magnetic material;
- a first leg, a second leg and a third leg which extend between said upper and lower yokes and around which a first coil, a second coil, and a third coil are arranged, respectively, wherein at least one portion of said first, second and third legs, when seen in a transverse cross section, is made of a second magnetic material, and wherein said first magnetic material has a magnetic permeability higher than the magnetic permeability of the second magnetic material;
- at least one unwound leg extending between said upper and lower yokes;
- wherein said at least one unwound leg comprises a third magnetic material having magnetic permeability higher than the magnetic permeability of the second magnetic material and lower than the magnetic permeability of the first magnetic material.
An apparatus, comprising:
- an inverter;
- a filter including an inductor having a core, said core comprises:
- an upper yoke and a lower yoke which comprise a first magnetic material;
- a first leg, a second leg and a third leg which extend between said per and lower yokes and around which a first coil, a second coil, and a third coil are arranged, respectively, wherein at least one portion of said first, second and third legs, when seen in a transverse cross section is made of a second magnetic material, and wherein said first magnetic material has a magnetic permeability higher than the magnetic permeability of the second magnetic material;
- at least one unwound leg extending between said upper and lower yokes;
- wherein said at least one unwound leg comprises a third magnetic material having magnetic permeability higher than the magnetic permeability of the second magnetic material and lower than the magnetic permeability of the first magnetic material.
Dependencies are inferred from the claim text.