Multiple parallel-connected resonant converter, inductor-integrated magnetic element and transformer-integrated magnetic element

• US 10,381,934 B2
• Filed: 01/25/2017
• Issued: 08/13/2019
• Est. Priority Date: 01/25/2016
• Status: Active Grant

• Current Assignee: Delta Electronics Shanghai Company Limited (Delta Electronics Incorporated)
• Original Assignee: Delta Electronics Shanghai Company Limited (Delta Electronics Incorporated)
• Inventors: Yang, Haijun, Lu, Zengyi, Xia, Weilong, Yan, Yajiang
• Primary Examiner(s): Finch, III, Fred E
• Application Number:
  US15/414,702
• Publication Number:
  US 20170214330A1
• Time in Patent Office: 930 Days
• CPC Class Codes: H01F 27/24 Magnetic cores
• CPC Class Codes: H01F 27/255 made from particles H01F27/26 takes precedence
• CPC Class Codes: H01F 27/2823 Wires H01F27/2866 takes precedence
• CPC Class Codes: H01F 37/00 Fixed inductances not covered by group H01F17/00
• CPC Class Codes: H02M 1/0058 by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero using an auxiliary actively switched resonant commutation circuit connected to an intermediate DC voltage or between two push-pull branches of an inverter bridge H02M7/4811; in resonant inverters H02M7/4815; in inverters operating from a resonant DC source H02M7/4826
• CPC Class Codes: H02M 3/01 Resonant DC/DC converters
• CPC Class Codes: H02M 3/285 Single converters with a plurality of output stages connected in parallel parallel operation of a plurality of converters in dc distribution networks H02J1/10
• CPC Class Codes: H02M 3/33523 with galvanic isolation between input and output of both the power stage and the feedback loop
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
• CPC Class Codes: Y02P 80/10 Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

Abstract

A multiple parallel-connected resonant converter, an inductor-integrated magnetic element and a transformer-integrated magnetic element are provided. The multiple parallel-connected resonant converter includes a first and a second converters. The first converter having a first input and output end includes a first inductor, a first transformer and a first capacitor connected in series. The second converter having a second input and output end includes a second inductor, a second transformer and a second capacitor connected in series. The second output end is connected with the first output end in parallel. The first and second inductor are integrated in a first magnetic element, the first magnetic element includes a first and second side column, and a first and second central column. The first inductor includes a first coil positioned around the first central column and the second inductor includes a second coil positioned around the second central column.

Claims

1. A multiple parallel-connected resonant converter, comprising:

a first converter having a first input end and a first output end, wherein the first converter comprises a first inductor, a first transformer and a first capacitor, and the first inductor, the first transformer and the first capacitor are connected in series to form a first resonant unit; and

a second converter having a second input end and a second output end, wherein the second converter comprises a second inductor, a second transformer and a second capacitor, the second inductor, the second transformer and the second capacitor are connected in series to form a second resonant unit, and the second output end is connected with the first output end in parallel,

wherein the first inductor and the second inductor are integrated in a first magnetic element, the first magnetic element comprises a first side column, a second side column and only two central columns, wherein the two central columns are a first central column and a second central column, the first inductor comprises a first coil, the second inductor comprises a second coil, the first coil is positioned around the first central column to form the first inductor, the second coil is positioned around the second central column to form the second inductor, and the first central column and the second central column have a same cross sectional area,

wherein the first input end of the first converter is connected with the second input end of the second converter in series, magnetic fields formed by the first coil and the second coil are in opposite directions at the same time.

2. The multiple parallel-connected resonant converter according to claim 1, wherein the first side column and the second side column are formed with a first opening and a second opening, the first opening and the second opening form a first connection line, the first central column and the second central column form a second connection line, and the first connection line is perpendicular to or parallel with the second connection line.

3. The multiple parallel-connected resonant converter according to claim 1, wherein a side of the first side column towards the first central column and the second central column has a first arc side and a second arc side, a side of the second side column towards the first central column and the second central column has a third arc side and a fourth arc side, the first central column and the second central column are in circular or oval shape, the first central column and the second central column form a first external common tangent line and a second external common tangent line, and there are not any intersection points between a group of the first arc side, the second arc side, the third arc side and the fourth arc side, and a group of the first external common tangent line and the second external common tangent line.

4. A multiple parallel-connected resonant converter, comprising:

a first converter having a first input end and a first output end, wherein the first converter comprises a first inductor, a first transformer and a first capacitor, and the first inductor, the first transformer and the first capacitor are connected in series to form a first resonant unit; and

a second converter having a second input end and a second output end, wherein the second converter comprises a second inductor, a second transformer and a second capacitor, the second inductor, the second transformer and the second capacitor are connected in series to form a second resonant unit, and the second output end is connected with the first output end in parallel,

wherein the first transformer and the second transformer are integrated in a first magnetic element, the first magnetic element comprises a first side column, a second side column and only two central columns, wherein the two central columns are a first central column and a second central column, the first transformer comprises a first primary coil and a first secondary coil positioned on the first central column, and the second transformer comprises a second primary coil and a second secondary coil positioned on the second central column, and the first central column and the second central column have a same cross sectional area,

wherein the first input end of the first converter is connected with the second input end of the second converter in series, magnetic fields formed by the first primary coil and the second primary coil are in opposite directions at the same time.

5. The multiple parallel-connected resonant converter according to claim 4, wherein the first side column and the second side column are formed with a first opening and a second opening, the first opening and the second opening form a first connection line, the first central column and the second central column form a second connection line, and the first connection line is perpendicular to or parallel with the second connection line.

6. The multiple parallel-connected resonant converter according to claim 5, wherein a side of the first side column towards the first central column and the second central column has a first arc side and a second arc side, a side of the second side column towards the first central column and the second central column has a third arc side and a fourth arc side, the first central column and the second central column are in circular or oval shape, the first central column and the second central column form a first external common tangent line and a second external common tangent line, and there are not any intersection points between a group of the first arc side, the second arc side, the third arc side and the fourth arc side, and a group of the first external common tangent line and the second external common tangent line.