US 12,573,942 B2Granted

Distributed phase-shifting transforming power supply system

AssigneeEaton Intelligent Power Limited

InventorsJiajie Duan, Jianxiong Yu, Qiang Chen, Cheng Luo, Han Li

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Abstract

The present disclosure provides a distributed phase-shifting transforming apparatus, including N transformer rectifier units, where each transformer rectifier unit includes two three-phase three-winding transformers and four rectifier circuits, each three-phase three-winding transformer includes first windings on the primary side and second windings and third windings on the secondary side, AC power output by the second windings and the third windings on the secondary side is output after being rectified by the rectifier circuits. Each transformer rectifier unit is configured such that: one set of the two first windings on the primary side and the two second windings on the secondary side is phase-shifted by 15° from each other, and the other set has the same phase angle; and the second windings and the third windings of each three-phase three-winding transformer are phase-shifted by 30° from each other.

Claims13

Dependent claims

A distributed phase-shifting transforming apparatus, comprising:

N transformer rectifier units, wherein N is greater than or equal to 2,
wherein each transformer rectifier unit comprises two three-phase three-winding transformers and four rectifier circuits,
wherein each three-phase three-winding transformer comprises first windings on a primary side and second windings and third windings on a secondary side,
wherein two first windings are connected in parallel to a three-phase AC input, two second windings and the two third windings are connected to respective ones of the four rectifier circuits, and positive and negative DC output terminals of the four rectifier circuits are respectively connected to positive and negative DC buses,
wherein each transformer rectifier unit is configured such that a phase angle difference between the two first windings is 15° and phase angles of the two second windings are the same or a phase angle difference between the two second windings is 15° and phase angles of the two first windings are the same, and
wherein, in each of the three-phase three-winding transformers, a phase angle difference between the second winding and the third winding is a preset angle,
wherein phase angles of two first windings of an Nth transformer rectifier unit are respectively 15°/N different from phase angles of two corresponding first winding of an (N−1)th transformer rectifier unit.

4 more elements

An apparatus comprising N transformer rectifier units, wherein each transformer rectifier unit comprises:

first and second transformers, each comprising a primary winding and first and second secondary windings, wherein the primary windings of the first and second transformers are coupled in parallel to an AC power source, wherein the primary winding of the second transformer is phase shifted with respect to the primary winding of the second transformer and wherein, for each of the first and second transformers, the first secondary winding is phase shifted with respect to the second secondary winding;
and
four rectifier circuits, wherein respective ones of the first and second secondary windings are coupled to inputs of respective ones of the rectifier circuits and wherein outputs of the rectifier circuits are coupled in parallel to a DC bus,
wherein N is greater than or equal to 2, and wherein phase angles of the primary windings of an Nth transformer rectifier unit are respectively 15°/N different from phase angles of corresponding ones of the primary windings of an (N−1)th transformer rectifier unit.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 18/323,080Filed 24 May 2023
Priority: CN 202210610566.031 May 2022
Published: US 2023/0386738 A130 Nov 2023
Granted: 10 Mar 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H02M 1/12
Details of apparatus for conversion: arrangements for reducing harmonics from AC input or output
H02M 5/10
By static converters: using transformers
H02M 7/219
Using semiconductor devices only: in a bridge configuration
H01F 30/14
Two-phase, three-phase or polyphase transformers: for changing the number of phases