Transformer and voltage transforming apparatus comprising the same

Patent metadata

Field	Value
Publication number	US-9406431-B2
Application number	US-201214424079-A
Country	US
Kind code	B2
Filing date	Dec 20, 2012
Priority date	Dec 20, 2012
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

A transformer includes a plurality of high-voltage side coils and a plurality of low-voltage side coils. The high-voltage side coils and the corresponding low-voltage side coils form a plurality of coil groups. A first coil group includes one of the high-voltage side coils and one of the low-voltage side coils wound around a first leg and one of the high-voltage side coils and one of the low-voltage side coils wound around a second leg adjacent to the first leg. A second coil group of the plurality of coil groups includes one of the high-voltage side coils and one of the low-voltage side coils wound around the first leg, and one of the high-voltage side coils and one of the low-voltage side coils wound around the second leg.

First claim

The invention claimed is:

1. A transformer comprising:
an iron core having a plurality of legs arranged at a distance from each other;
a plurality of high-voltage side coils each wound around one of said plurality of legs, and receiving common single-phase AC power; and
a plurality of low-voltage side coils provided in correspondence with said high-voltage side coils, magnetically coupled to corresponding said high-voltage side coils, and each wound around one of said plurality of legs,
said high-voltage side coils and corresponding said low-voltage side coils constituting a plurality of coil groups,
a first coil group of said plurality of coil groups including one of said high-voltage side coils and one of said low-voltage side coils corresponding to the one of said high-voltage side coils, each wound around a first leg of said plurality of legs, and one of said high-voltage side coils and one of said low-voltage side coils corresponding to the one of said high-voltage side coils, each wound around a second leg adjacent to said first leg of said plurality of legs, and
a second coil group of said plurality of coil groups including one of said high-voltage side coils and one of said low-voltage side coils corresponding to the one of said high-voltage side coils, each wound around said first leg, and one of said high-voltage side coils and one of said low-voltage side coils corresponding to the one of said high-voltage side coils, each wound around said second leg,
in said first coil group, the one of said high-voltage side coils wound around said first leg and the one of said high-voltage side coils wound around said second leg being located adjacent to each other, and the one of said low-voltage side coils wound around said first leg and the one of said low-voltage side coils wound around said second leg being located adjacent to each other,
in said second coil group, the one of said high-voltage side coils wound around said first leg and the one of said high-voltage side coils wound around said second leg being located adjacent to each other, and the one of said low-voltage side coils wound around said first leg and the one of said low-voltage side coils wound around said second leg being located adjacent to each other,
in said first coil group, the one of said low-voltage side coils wound around said first leg and the one of said low-voltage side coils wound around said second leg each being coupled to an identical load, and
in said second coil group, the one of said low-voltage side coils wound around said first leg and the one of said low-voltage side coils wound around said second leg each being coupled to an identical load different from said load to which said first coil group is coupled.

2. A voltage transforming apparatus comprising:
the transformer according to claim 1 ; and
a converter that converts an AC voltage induced in said low-voltage side coils into a DC voltage.

3. The voltage transforming apparatus according to claim 2 , further comprising an inverter that converts the DC voltage converted by said converter into a three-phase AC voltage.

4. The voltage transforming apparatus according to claim 2 , which is mounted on an electric vehicle.

Assignees

• Noda Toshihiro
• Mitsubishi Electric Corp

Inventors

• Noda Toshihiro

Classifications

• B60L2200/26

  Rail vehicles · CPC title

• H01F27/38

  Auxiliary core members; Auxiliary coils or windings · CPC title

• H01F27/346 Primary

  Preventing or reducing leakage fields (using magnetic shields H01F27/36; using auxiliary windings H01F27/38) · CPC title

• B60L9/28

  polyphase motors · CPC title

• H01F30/12

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