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Transformer with core frame with interlocking members

A technology for distribution transformers and frames, which is applied in the field of transformers and can solve problems such as labor-intensive and high cost of core frames

Active Publication Date: 2016-10-12
HITACHI ENERGY SWITZERLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Producing such a core frame is costly and labor intensive

Method used

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  • Transformer with core frame with interlocking members
  • Transformer with core frame with interlocking members
  • Transformer with core frame with interlocking members

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Embodiment Construction

[0016] In the present invention, the slot and tab interlock replaces the labor intensive aspects of bolting or welding and results in less production time required for core frame assembly. The invention also reduces the number of pieces required in the assembly. The slot and tab interlocking mechanism is useful in smaller, lighter weight transformers, while one embodiment of the slot and tab transformer core frame utilizing a support member subassembly with main plates, cams, and locking plates is useful in larger, lighter weight transformers. Preferred in heavier transformers. Lower cost and less labor in frame assembly is the main purpose of this invention.

[0017] The invention relates to a distribution transformer 15, 50 having a core 11 supported by an improved core frame 17 of the invention. Distribution transformers 15, 50 may be single-phase or multi-phase (eg, three-phase). Additionally, the distribution transformers 15, 50 may be dry or fluid filled. If the dist...

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PUM

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Abstract

A distribution transformer having a slot-and-tab core frame assembly. The core frame (17) encloses a transformer core (11) having at least one phase and provides compression on the core yokes and end members of the transformer to bind the assembly together. First and second clamps (10, 24) of the core frame contain receiving slots (34) for the tabbed (18, 28), longitudinal side supports (20), creating an interlock when connected. For larger transformers, the tabbed side supports may be alternatively comprised of a subassembly of end plates, cams, and tabbed locking plates, encompassing a sturdy locking mechanism.

Description

technical field [0001] This application relates to transformers and more particularly to supports for transformer cores. Background technique [0002] The frame used for the inner core of a distribution transformer serves the purpose of clamping and compressing the top and bottom yokes of the core, thereby holding the core together. Construction of conventional transformer core frames typically involves bolting, welding, or engaging pins to achieve mechanical interlocking of the constituent members of the core frame. Producing such a core frame is costly and labor intensive. There is thus a need for a new core frame that is simpler and easier to produce. The present invention relates to such an improved core frame. Contents of the invention [0003] The present invention relates to a distribution transformer having a slot-and-tab interlocking core frame. A core frame surrounds a ferromagnetic core having one or more core limbs. A core frame is formed from first and se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/26
CPCH01F27/263H01F41/02Y10T29/49073
Inventor C·W·约翰逊
Owner HITACHI ENERGY SWITZERLAND AG