US-12620524-B2 - Transformer device

US12620524B2US 12620524 B2US12620524 B2US 12620524B2US-12620524-B2

Abstract

A transformer device includes: a transformer including a core and a coil; a suspension tool attachment unit disposed above the coil and connected to the core; and a cover body having an internal space and connected to the suspension tool attachment unit. A suspension tool for suspending the transformer device including the transformer and the cover is attachable to the suspension tool attachment unit. The cover body is provided with: a first opening located below a first phase transformer and allowing communication between the internal space and a space outside the internal space; and a second opening located above a third phase transformer and allowing communication between the internal space and the space outside the internal space. An air flow is formed such that air flows into the internal space through the first opening and is discharged to the space outside the internal space through the second opening.

Inventors

Shingo FUJIMURA

Assignees

DMG MORI CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20210408
Priority Date: 20200703

Claims (3)

1 . A transformer device comprising: a transformer including a core and a coil wound around the core; a suspension tool attachment unit disposed above the coil and connected to the core; and a cover body having an internal space that accommodates the transformer and connected to the suspension tool attachment unit, wherein a suspension tool for suspending the transformer device including the transformer and the cover body is attachable to the suspension tool attachment unit, the transformer includes a first phase transformer, a second phase transformer stacked above the first phase transformer, and a third phase transformer stacked above the second phase transformer, the suspension tool attachment unit is connected to the core of the third phase transformer, the transformer device further comprises: a first connection member that connects the core of the first phase transformer and the core of the second phase transformer; a second connection member that connects the core of the second phase transformer and the core of the third phase transformer; and a lower frame disposed below the first phase transformer and connected to the first phase transformer, the cover body is supported by the suspension tool attachment unit and the lower frame, the cover body is provided with: a first opening located below the first phase transformer and allowing communication between the internal space and a space outside the internal space; and a second opening located above the third phase transformer and allowing communication between the internal space and the space outside the internal space, and an air flow is formed such that air flows into the internal space through the first opening and is discharged to the space outside the internal space through the second opening.
2 . The transformer device according to claim 1 , further comprising an electric device disposed below the first phase transformer and supported by the lower frame.
3 . The transformer device according to claim 1 , further comprising a third connection member that connects the cover body and one of the suspension tool attachment unit and the lower frame, the third connection member being adjustable in position in accordance with a mutual positional relation between the cover body and the connected one.

Description

TECHNICAL FIELD The present invention relates to a transformer device. BACKGROUND ART For example, Japanese Patent Laying-Open No. 2016-81965 (PTL 1) discloses a transformer device including: a stack formed by stacking a W-phase, a V-phase, and a U-phase in the up-down direction; and a highly rigid inner frame. The inner frame includes: a base box on which the stack is placed; and a frame body disposed on the base box to surround the stack. A pair of suspension bolts for lifting up and transporting the transformer device are connected to an upper end of the frame body. CITATION LIST Patent Literature PTL 1: Japanese Patent Laying-Open No. 2016-81965 SUMMARY OF INVENTION Technical Problem In the transformer device disclosed in the above-mentioned PTL 1, the pair of suspension bolts used for lifting up the transformer device are connected to the frame body surrounding a core of a transformer. In such a configuration, however, a heavy weight of the transformer acts on the frame body, and thus, the frame body surrounding the stack needs to be entirely firmly formed. This may increase the manufacturing cost of the transformer device. Thus, an object of the present invention is to solve the above-described problem and to provide a transformer device that can be reduced in manufacturing cost in a configuration with consideration given to an operation of lifting up the transformer device. Solution to Problem A transformer device according to one aspect of the present invention includes: a transformer including a core and a coil wound around the core; a suspension tool attachment unit disposed above the coil and connected to the core; and a cover body having an internal space that accommodates the transformer and connected to the suspension tool attachment unit. A suspension tool for suspending the transformer device including the transformer and the cover body is attachable to the suspension tool attachment unit. The transformer includes a first phase transformer, a second phase transformer stacked above the first phase transformer, and a third phase transformer stacked above the second phase transformer. The suspension tool attachment unit is connected to the core of the third phase transformer. The transformer device further includes: a first connection member that connects the core of the first phase transformer and the core of the second phase transformer; a second connection member that connects the core of the second phase transformer and the core of the third phase transformer; and a lower frame disposed below the first phase transformer and connected to the first phase transformer. The cover body is supported by the suspension tool attachment unit and the lower frame. The cover body is provided with: a first opening located below the first phase transformer and allowing communication between the internal space and a space outside the internal space; and a second opening located above the third phase transformer and allowing communication between the internal space and the space outside the internal space. An air flow is formed such that air flows into the internal space through the first opening and is discharged to the space outside the internal space through the second opening. A transformer device according to another aspect of the present invention includes: a transformer including a core and a coil wound around the core; and a suspension tool attachment unit disposed above the coil and connected to the core. A suspension tool for suspending the transformer device is attachable to the suspension tool attachment unit. According to the transformer device configured as described above, the suspension tool attachment unit to which the suspension tool is attachable is connected to the core of the transformer, and thereby, a heavy weight of the transformer can be exerted on the suspension tool attachment unit disposed above the coil when the transformer device is lifted up. This makes it possible to reduce the manufacturing cost of the transformer device in the configuration with consideration given to the operation of lifting up the transformer device. Preferably, the transformer includes a first phase transformer, a second phase transformer stacked above the first phase transformer, and a third phase transformer stacked above the second phase transformer. The suspension tool attachment unit is connected to the core of the third phase transformer. The transformer device further includes: a first connection member that connects the core of the first phase transformer and the core of the second phase transformer; and a second connection member that connects the core of the second phase transformer and the core of the third phase transformer. According to the transformer device configured as described above, when the transformer device is lifted up, a heavy weight of the transformer including the first phase transformer, the second phase transformer, and the third phase transformer stacked in the up-down direct