Magnetic component and power conversion device using the same

Patent metadata

Field	Value
Publication number	US-10269484-B2
Application number	US-201816049806-A
Country	US
Kind code	B2
Filing date	Jul 30, 2018
Priority date	Aug 3, 2017
Publication date	Apr 23, 2019
Grant date	Apr 23, 2019

Abstract

A magnetic component comprising: a magnetic core comprising an upper magnetic core portion, a lower magnetic core portion, and four core columns; a first winding wound around any two core columns which form a first closed magnetic circuit with the upper and lower magnetic core portions therebetween; and a second winding wound around remaining two core columns which form a second closed magnetic circuit with the upper and lower magnetic core portions therebetween. A sum of an AC flux peak-peak value within single core column of the first closed magnetic circuit, and an AC flux peak-peak value within single core column of the second closed magnetic circuit is larger than not only an AC flux peak-peak value within the upper magnetic core portion, but also an AC flux peak-peak value within the lower magnetic core portion. The first winding and the second winding are not connected in series directly.

First claim

What is claimed is:

1. A magnetic component, characterized in that it comprises:
a magnetic core comprising an upper magnetic core portion, a lower magnetic core portion, and four core columns which share the upper magnetic core portion and the lower magnetic core portion and are disposed therebetween;
a first winding wound around any two of the four core columns, such that a first closed magnetic circuit is formed between the two core columns wound by the first winding and the upper and the lower magnetic core portions; and
a second winding wound around remaining two of the four core columns, such that a second closed magnetic circuit is formed between the two core columns wound by the second winding and the upper and the lower magnetic core portions, wherein the first winding and the second winding are in a power conversion device;
wherein an external volt-second of the first winding determines a first AC flux within the core columns of the first closed magnetic circuit, an external volt-second of the second winding determines a second AC flux within the core columns of the second closed magnetic circuit, a sum of a first AC flux peak-peak value within one core column of the first closed magnetic circuit and a second AC flux peak-peak value within one core column of the second closed magnetic circuit is larger than not only a third AC flux peak-peak value within the upper magnetic core portion but also a fourth AC flux peak-peak value within the lower magnetic core portion, and the first winding and the second winding are connected in series indirectly or connected in parallel.

2. The magnetic component according to claim 1 , characterized in that AC fluxes in any two adjacent core columns are opposite in direction.

3. The magnetic component according to claim 1 , characterized in that AC fluxes in any two adjacent core columns are 180° phase shifted.

4. The magnetic component according to claim 1 , characterized in that the power conversion device comprises two converting circuits whose inputs are connected in series, wherein the first winding is in one of the converting circuits, and the second winding is in the other converting circuit.

5. The magnetic component according to claim 1 , characterized in that the power conversion device comprises two converting circuits whose inputs are connected in parallel, wherein the first winding is in one of the converting circuits, and the second winding is in the other converting circuit.

6. The magnetic component according to claim 1 , characterized in that the first winding is a coil of a first inductor of the power conversion device, and the second winding is a coil of a second inductor of the power conversion device.

7. The magnetic component according to claim 6 , characterized in that the converting circuit is a resonant type converting circuit, and the first inductor and the second inductor are resonant inductors, respectively.

8. The magnetic component according to claim 1 , characterized in that the first winding is a first primary winding of a first transformer of the power conversion device, and the second winding is a second primary winding of a second transformer.

9. The magnetic component according to claim 1 , characterized in that the first winding is a first secondary winding of a first transformer of the power conversion device, and the second winding is a second secondary winding of a second transformer.

10. The magnetic component according to claim 1 , characterized in that each of the core columns is formed of an upper column extending vertically downwards from a first surface of the upper magnetic core portion, and a lower columns extending vertically upwards from a second surface which is face to face with the first surface in the lower magnetic core portion, and a position of each of the lower column corresponds to a position of the upper column.

11. A power conversion device, characterized in that it comprises:
a first converting circuit comprising a first transformer; and
a second converting circuit, an input of which being connected to an input of the first converting circuit in series, an output of which being connected to an output of the first converting circuit in parallel, and the second converting circuit comprising a second transformer;
wherein the first and the second transformers are formed of a first magnetic component, the first magnetic component comprising:
a first magnetic core comprising a first upper magnetic core portion, a first lower magnetic core portion, and four first core columns which share the first upper magnetic core portion and the first lower magnetic core portion and are disposed therebetween, and each of the first core columns being wound by a secondary winding of the first transformer or a secondary winding of the second transformer;
a first primary winding of the first transformer wound around any two of the four first core columns, such that a first closed magnetic circuit is formed between the two first core columns wound by the first primary winding and the first upper and lower magnetic core portions; and
a second primary winding of the second transformer wound around remaining two of the four first core columns, such that a second closed magnetic circuit is formed between the two first core columns wound by the second primary winding and the first upper and lower magnetic core portions;
wherein a sum of a first AC flux peak-peak value within one core column of the first closed magnetic circuit and a second AC flux peak-peak value within one core column of the second closed magnetic circuit is larger than not only a third AC flux peak-peak value within the first upper magnetic core portion but also a fourth AC flux peak-peak value within the first lower magnetic core portion.

12. The power conversion device according to claim 11 , characterized in that the first converting circuit and the second converting circuit are in-phase switching circuits; and AC fluxes in any two adjacent core columns are opposite in direction.

13. The power conversion device according to claim 11 , characterized in that the first converting circuit and the second converting circuit are switching circuits that are 180° phase shifted; and AC fluxes in any two adjacent core columns are 180° phase shifted.

14. The power conversion device according to claim 11 , characterized in that the first converting circuit and the second converting circuit are resonant type converting circuits, respectively.

15. The power conversion device according to claim 14 , characterized in that the first converting circuit further comprises a first resonant inductor, the second converting circuit further comprises a second resonant inductor, and the first resonant inductor and the second resonant inductor are formed of a second magnetic component comprising:
a second magnetic core comprising a second upper magnetic core portion, a second lower magnetic core portion, and four second core columns which share the second upper magnetic core portion and the second lower magnetic core portion and are disposed therebetween;
a first winding of the first resonant inductor wound around any two of the four second core columns, such that a third closed magnetic circuit is formed between the two second core columns wound by the first winding and the second upper and lower magnetic core portions; and
a second winding of the second resonant inductor wound around remaining two of the four second core columns, such that a fourth closed magnetic circuit is formed between the two second core columns wound by the second winding and the second upper and lower magnetic core portions;

Assignees

• Delta Electronics Inc

Inventors

• Jin Da
• Xiong Yahong

Classifications

• H01F27/2804

  Printed windings · CPC title

• H01F27/306

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

• H02M3/33592

  having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer · CPC title

• H01F2027/065

  Mounting on printed circuit boards · CPC title

• H02M1/44

  Circuits or arrangements for compensating for electromagnetic interference in converters or inverters · CPC title