Transient noise reduction filtering system
AssigneeAnalog Power Conversion LLC
InventorSam Seiichiro Ochi
Life of this patent
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Abstract
A transient noise reduction filter comprises a cable including one or more twisted pairs of conductors and one or more common mode chokes (CMCs). The one or more CMCs a formed from respective pluralities of turns of the cable. Each of the CMCs may be a magnetic CMC wherein the plurality of turns of the cable are wrapped around a magnetic core, or an air-core CMC wherein the plurality of turns of the cable are not wrapped around a magnetic core but are instead disposed around a non-magnetic material (such as air)
Claims15
A transient noise reduction filter, comprising:
- a cable including one or more twisted pairs of conductors;
- and
- a first common mode choke (CMC) comprising a first plurality of turns of the cable,
- wherein the cable supplies power and at least one signal to a power module comprising a high speed semiconductor power switch and a protection circuit, and
- wherein the first plurality of turns of the cable includes a Faraday shield around the one or more twisted pairs of conductors.
A transient noise reduction filter, comprising:
- a cable including one or more twisted pairs of conductors;
- a first common mode choke (CMC) comprising a first plurality of turns of the cable;
- and
- a second CMC comprising a second plurality of turns of the cable,
- wherein a portion of the cable between the first plurality of turns and the second plurality of turns is more than one meter long.
A method of providing transient noise reduction on a cable including a twisted pair of conductors, comprising:
- providing a first common mode choke (CMC) by forming a first plurality of turns of the cable around a first core;
- and
- providing a second CMC by forming a second plurality of turns of the cable around a second core,
- wherein the first core has a different permeability than the second core, a different bandwidth than the second core, or both, and
- wherein forming the first plurality of turns of the cable includes forming the first plurality of turns of the cable around a non-magnetic core.
A transient noise reduction filter comprising:
- a cable including one or more twisted pairs of conductors;
- and
- a first common mode choke (CMC) comprising a first plurality of turns of the cable,
- wherein the cable supplies power and at least one signal to a power module comprising a high speed semiconductor power switch and a protection circuit,
- wherein the first common mode choke (CMC) comprises a magnetic core,
- wherein the first plurality of turns of the cable are wrapped around the magnetic core, and
- wherein the magnetic core is a high frequency low permeability ferrite core.
Dependencies are inferred from the claim text.