Inductor assembly

Patent metadata

Field	Value
Publication number	US-11217379-B2
Application number	US-201917050753-A
Country	US
Kind code	B2
Filing date	Apr 16, 2019
Priority date	Apr 27, 2018
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

Various embodiments include an inductor assembly for a converter comprising: a plurality of first conductors arranged on respective legs of a first magnetic core; a second magnetic core with one or more legs, the second core magnetically coupled to the first core via an air-gap and arranged to provide a path for common mode magnetic flux of the plurality of first conductors; and a respective second conductor corresponding to each of the plurality of first conductors. Each pair of first and second conductors is electrically connected in series. The second conductors are arranged on a single leg of the second core and positively coupled to each other.

First claim

What is claimed is:

1. An inductor assembly for a converter, the assembly comprising:
a plurality of first conductors arranged on respective legs of a first magnetic core;
a second magnetic core with one or more legs, the second core magnetically coupled to the first core via an air-gap and arranged to provide a path for common mode magnetic flux of the plurality of first conductors; and
a respective second conductor corresponding to each of the plurality of first conductors;
wherein each pair of first and second conductors is electrically connected in series; and
the second conductors are arranged on a single leg of the second core and positively coupled to each other.

2. The inductor assembly of claim 1 , wherein pairs of the first conductors are inversely coupled to one another.

3. The inductor assembly of claim 1 , wherein the pairs of corresponding first and second conductors are positively coupled.

4. The inductor assembly of claim 1 , wherein the second core is LL-shaped.

5. The inductor assembly of claim 1 , wherein:
each pair of the corresponding first and second conductors is inversely coupled; and
the second core comprises at least two legs.

6. The inductor assembly of claim 5 , wherein the second core comprises exactly two legs.

7. The inductor assembly of claim 6 , wherein the second core is FF shaped.

8. The inductor assembly of claim 1 , wherein:
the first magnetic core comprises a first core material; and
the second core comprises a second core material different from the first core material.

9. The inductor assembly of claim 1 , wherein the second core at least partially surrounds the first magnetic core.

10. The inductor assembly of claim 1 , wherein:
the second core includes a multi-leg core in a first direction; and
at least some of the plurality of first cores are arranged to extend in a second direction to be magnetically coupled to the legs of the second core.

11. The inductor assembly of claim 10 , wherein:
at the locations of the legs the second core is LL-shaped with the arms of the LL shape extending in the second direction; and
the first cores are arranged adjacent to the arms of the LL shape.

12. The inductor assembly of claim 10 , further comprising a third core shaped like the second core and arranged adjacent to the second core in the second direction on a side opposite to the plurality of first cores.

13. A multiple phase converter comprising:
an inductor assembly comprising:
a plurality of first conductors arranged on respective legs of a first magnetic core;
a second magnetic core with one or more legs, the second core magnetically coupled to the first core via an air-gap and arranged to provide a path for common mode magnetic flux of the plurality of first conductors; and
a respective second conductor corresponding to each of the plurality of first conductors;

wherein each pair of first and second conductors is electrically connected in series;
the second conductors are arranged on a single leg of the second core and positively coupled to each other;
the first core has a respective leg for each of the phases; and
each of the plurality of first conductors corresponds to one of the phases.

14. A multiple phase converter according to claim 13 , wherein:
the multiple phase converter comprises a three-phase converter; and
the first core is EE shaped with three legs.

15. A multiple phase interleaved converter comprising:
a plurality of modules; and
an inductor assembly comprising:
a plurality of first conductors arranged on respective legs of a first magnetic core;
a second magnetic core with one or more legs, the second core magnetically coupled to the first core via an air-gap and arranged to provide a path for common mode magnetic flux of the plurality of first conductors; and
a respective second conductor corresponding to each of the plurality of first conductors;

wherein each pair of first and second conductors is electrically connected in series;
the second conductors are arranged on a single leg of the second core and positively coupled to each other;
additional first cores for each of the plurality of modules;
wherein the respective first conductors on each of the first cores correspond to a phase of the respective module;
the second core comprises a respective leg for each of the modules; and
the second conductors on each leg correspond to the respective module.

Assignees

• Siemens Ag

Inventors

• Mondal Gopal
• Neumeister Matthias
• Hänsel Stefan
• Robinson Jonathan

Classifications

• H02M7/493

  the static converters being arranged for operation in parallel · CPC title

• H02M1/0043

  Converters switched with a phase shift, i.e. interleaved (non-isolated DC/DC converters H02M3/1586) · CPC title

• H02M7/003 Primary

  Constructional details, e.g. physical layout, assembly, wiring or busbar connections · CPC title

• H01F27/26 Primary

  Fastening parts of the core together; Fastening or mounting the core on casing or support (on coil H01F27/30) · CPC title

• H01F3/14

  Constrictions; Gaps, e.g. air-gaps (in magnetic shunt paths H01F3/12) · CPC title