Power supply multi-tapped autotransformer

Patent metadata

Field	Value
Publication number	US-11749454-B2
Application number	US-201916397237-A
Country	US
Kind code	B2
Filing date	Apr 29, 2019
Priority date	Apr 29, 2019
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

An apparatus comprises: first windings, second windings, a magnetic core, and multiple tap nodes. The first windings are primary windings of a multi-tapped autotransformer. The second windings are secondary windings of the multi-tapped autotransformer. The first windings and the second windings are wrapped around the magnetic core, the second windings disposed in a series connection between the first windings. The multiple tap nodes providing coupling of the first windings and the second windings to a power supply circuit such as a switched-capacitor converter.

First claim

The invention claimed is:

1. An apparatus comprising:
first windings, the first windings being primary windings of a multi-tapped autotransformer;
second windings, the second windings being secondary windings of the multi-tapped autotransformer;
a magnetic core around which the first windings and the second windings are wrapped, the second windings disposed in a series connection between the first windings; and
multiple tap nodes coupled to the first windings and the second windings.

2. The apparatus as in claim 1 , wherein the first windings include a first primary winding and a second primary winding; and
wherein the second windings are connected in series between the first primary winding and the second primary winding.

3. The apparatus as in claim 2 , wherein each of the first primary winding and the second primary winding are operable to receive energy supplied from an input voltage source, the energy conveyed from the first windings to the second windings producing an output voltage.

4. The apparatus as in claim 1 , wherein the first windings are operable to receive energy from an input voltage source; and
wherein the second windings are operable to receive energy from the primary windings through the magnetic core and generate an output voltage to power a load.

5. The apparatus as in claim 1 , wherein the multiple tap nodes include first tap nodes and second tap nodes, the first tap nodes disposed opposite the second tap nodes with respect to a body of the magnetic core;
wherein the first tap nodes are coupled to the first windings; and
wherein the second tap nodes are coupled to the second windings.

6. The apparatus as in claim 1 , wherein the multiple tap nodes include a set of tap nodes coupled to the second windings, the set of tap nodes disposed at an axial end of a body of the magnetic core.

7. The apparatus as in claim 1 , wherein the multiple tap nodes include a set of tap nodes coupled to the second windings, the set of tap nodes residing at a location of the magnetic core in which the second windings are connected in series with respect to each other.

8. The apparatus as in claim 1 , wherein each of the first windings includes an integer number of turns; and
wherein each of the second windings includes an integer number of turns.

9. The apparatus as in claim 1 , wherein each of the first windings includes a non-integer number of turns; and
wherein each of the second windings includes an integer number of turns.

10. The apparatus as in claim 1 , wherein each of the first windings includes a non-integer number of turns; and
wherein each of the second windings includes a non-integer number of turns.

11. The apparatus as in claim 1 , wherein the magnetic core includes multiple magnetic cores around which the first windings and the second windings are wound.

12. The apparatus as in claim 11 , wherein each of the first windings is wound around a combination of the multiple magnetic cores; and
wherein each of the second windings is wound around only a single magnetic core of the magnetic cores.

13. The apparatus as in claim 1 , wherein the first windings include a first set of primary windings and a second set of primary windings, each of the first set of primary windings wound around a combination of the multiple magnetic cores, each of the second primary windings wound around the combination of the multiple magnetic cores; and
wherein the second windings include a first set of secondary windings and a second set of secondary windings, each of the secondary windings in the first set wound around only a first magnetic core of the multiple magnetic cores, each of the secondary windings in the second set wound around only a second magnetic core of the multiple magnetic cores.

14. The apparatus as in claim 1 , wherein each of the first windings includes an integer number of turns; and
wherein each of the second windings includes a non-integer number of turns.

15. The apparatus as in claim 1 , wherein the multi-tapped autotransformer includes a transformer core comprising the magnetic core and a magnetic return path in which to carry magnetic flux passing through the magnetic core of the multi-tapped autotransformer.

16. The apparatus as in claim 15 , wherein each of the first windings and the second windings pass through a channel of the transformer core, the channel disposed between the magnetic core and the magnetic return path.

17. The apparatus as in claim 1 , wherein the multi-tapped autotransformer includes the magnetic core and multiple magnetic core returns spaced apart from the magnetic core, the multiple magnetic core returns operative to carry magnetic flux passing through the magnetic core of the multi-tapped autotransformer.

18. The apparatus as in claim 17 , wherein the magnetic core returns include a first magnetic core return and a second magnetic core return;
wherein each of the first windings and the second windings pass through a first channel of the multi-tapped autotransformer, the first channel disposed between the magnetic core and the first magnetic core return; and
wherein each of the first windings and the second windings pass through a second channel of the multi-tapped autotransformer, the second channel disposed between the magnetic core and the second magnetic core return.

19. The apparatus as in claim 18 , wherein the first windings include a first primary winding and a second primary winding;
wherein the second windings include a first secondary winding and a second secondary winding;
wherein a first axial end of the first primary winding extends through a first axial end of the first channel to a first terminal;
wherein a second axial end of the first primary winding extends through a first axial end of the second channel to a second terminal;
wherein a first axial end of the second primary winding extends through a second axial end of the first channel to a third terminal; and
wherein a second axial end of the second primary winding extends through a second axial end of the second channel to a fourth terminal.

20. The apparatus as in claim 19 , wherein a first axial end of the first secondary winding extends through the first axial end of the first channel to a fifth terminal;
wherein a second axial end of the first secondary winding extends through the first axial end of the second channel to a sixth terminal;
wherein a first axial end of the second secondary winding extends through the second axial end of the first channel to a seventh terminal; and
wherein a second axial end of the second secondary winding extends through the second axial end of the second channel to an eighth terminal.

21. The apparatus as in claim 1 , wherein the multi-tapped autotransformer includes a transformer core comprising the magnetic core in which to convey first magnetic flux and second magnetic flux, the first magnetic flux passing through the magnetic core in a first direction based on first current flowing through the multi-tapped autotransformer, the second magnetic flux passing through the magnetic core in a second direction based on second current flowing through the multi-tapped autotransformer.

22. The apparatus as in claim 1 , wherein the first windings include a first primary winding and a second primary winding, the apparatus further comprising:
a switched-capacitor converter including a first capacitor and a second capacitor;
a first resonant circuit path including a combination of the first capacitor and

Assignees

• Infineon Technologies Austria Ag

Inventors

• Rizzolatti Roberto
• Rainer Christian
• Wiedenbauer Otto

Classifications

• H01F30/02 Primary

  Auto-transformers · CPC title

• H01F27/266

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

• H01F27/306

  Fastening or mounting coils or windings on core, casing or other support · CPC title

• H01F30/12

  Two-phase, three-phase or polyphase transformers · CPC title

• H02M3/01

  Resonant DC/DC converters · CPC title