Polyphase inductive filter

Patent metadata

Field	Value
Publication number	US-2020217881-A1
Application number	US-202016732991-A
Country	US
Kind code	A1
Filing date	Jan 2, 2020
Priority date	Jan 4, 2019
Publication date	Jul 9, 2020
Grant date	—

Abstract

A device including at least two transfomers, wherein: each winding of a transformer is electrically in series with a winding of another transformer, and the transformers have a transformation ratio different from one.

First claim

What is claimed is:

1 . A device comprising at least two transformers, wherein:
each winding of a transformer is electrically in series with a winding of another transformer; and the transformers have a transformation ratio different from one.

2 . The device of claim 1 , wherein at least two windings of a same transformer have different numbers of spirals.

3 . The device of claim 1 , wherein the coupling coefficient of each transformer is greater than 0.9.

4 . The device of claim 1 , wherein the phase points of the windings are opposite.

5 . The device of claim 1 , comprising at least two paths, each of which comprises at least two windings in series of different transformers.

6 . The device of claim 5 , wherein the phase points of at least two windings of a same path are opposite.

7 . The device of claim 5 , wherein the number of transformers is equal to the number of paths.

8 . The device of claim 5 , wherein the number of windings in series per path is equal to the number of windings per transformer.

9 . The device of claim 5 , wherein each path represents a phase of an AC voltage.

10 . The device of claim 1 , wherein each transformer comprises a toroidal magnetic circuit.

11 . The device of claim 1 , comprising a PCB-type substrate having magnetic circuits of the transformers included therein.

12 . The device of claim 11 , wherein said windings are each defined by conductive tracks located on the opposite surfaces of the substrate and series-coupled by vias.

13 . A polyphase inductive filter comprising the device of claim 1 .

14 . A switched-mode converter comprising at least one device of claim 1 .

Assignees

• Commissariat Energie Atomique

Inventors

• Lefevre Guillaume

Classifications

• H01F17/0006 Primary

  Printed inductances (printed coils for dynamo-electric machines H02K3/26; printed circuits H05K) · CPC title

• H02M3/003

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

• H02M3/1586

  switched with a phase shift, i.e. interleaved · CPC title

• H02M1/0064

  Magnetic structures combining different functions, e.g. storage, filtering or transformation · CPC title

• H02M3/33576

  having at least one active switching element at the secondary side of an isolation transformer · CPC title