Novel core-type transformer with windings arranged in staggered mode

A transformer and interleaved technology, applied in the field of new transformers, can solve problems such as increasing creepage distance along the surface, doubling ultra-high voltage transformers, and preventing transformer oil from flowing

Pending Publication Date: 2020-05-12
孙崇山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most core-type and shell-type transformers with staggered windings have extremely short windings. When outer corner rings are used, the entire winding will be covered, the transformer oil cannot flow, and the temperature rise of the winding will reach an unacceptable level.
[0019] Secondly, for heart-type transformers with staggered windings, including shell-type tra

Method used

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  • Novel core-type transformer with windings arranged in staggered mode
  • Novel core-type transformer with windings arranged in staggered mode
  • Novel core-type transformer with windings arranged in staggered mode

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0114] Example 1. S13-400 / 10±2×0.25% / 0.4 transformer is selected as the implementation plan. The reason for the selection is that distribution transformers are extremely sensitive to cost control. The industry generally sacrifices sudden short-circuit capability to reduce costs. Therefore, the core and winding cross-sections of distribution transformers are non-circular. Therefore, the cost of new transformers is similar to that of non-circular cross-sections. In contrast to the heart-type transformer, the cost reduction percentage of the new transformer is more convincing under the premise of ensuring the short-circuit capability. Comparing with the most common set of drawings in the industry, the model of the control group is S13—400 / 10±2×0.25% / 0.4, the core and winding cross-section are oval, core transformer, and concentric winding.

[0115] Example 1. S13—400 / 10±2×0.25% / 0.4

[0116] National standard: load loss Pk=4200W

[0117] No-load loss P 0 =410W

[0118] No-load current p...

Example Embodiment

[0134] Example 2: HTSSPZ——6300 / 11 electric furnace transformer

[0135] 1. Ferroalloy furnace transformer, capacity 6300KVA, three-phase 11-level on-load voltage regulation, high voltage 10KV, low voltage 122V——142V, connection group Dd11, cooling method is strong oil circulating water cooling, insulation level LI85AC35 / AC5.

[0136] 2. The comparison group electric furnace transformer, the iron core and winding cross-section are circular, the windings are arranged in staggered arrangement, the insulation distance between the high voltage coil and the low voltage coil is 25mm, and the low voltage coil is 35mm from the iron yoke (pressurized plate).

[0137] 3. The new electric furnace transformer adopts U-shaped flat-bottom screen. The core and winding section are oblong. The windings are arranged in a staggered manner. The insulation distance between the high voltage coil and the low voltage coil is 15mm, and the distance between the low voltage coil and the iron yoke is 35mm (pressu...

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Abstract

The invention relates to a novel transformer. Structural advantages of an existing shell-type transformer and an existing core-type transformer are integrated, so a shell-type transformer and a core-type transformer can be completely replaced. The cost is greatly reduced, and the percent of pass of sudden short circuit tests is theoretically 100%. A transformer winding is good in cooling effect, high in overload capacity, large in limit capacity and convenient to transport, and the limit capacity is superior to that of a shell type transformer. When vertical transportation is inconvenient, thetransformer body can be transported horizontally, and the transportation height is reduced. The capacitor is compact in structure, small in appearance size, light in overall weight, uniform in capacitor distribution, reliable in insulation and high in lightning stroke resistance and operation overvoltage resistance, and leads are convenient to install.

Description

technical field [0001] The invention is a new type of transformer, which is another form of transformer besides the shell type transformer and the traditional core type transformer. Combining the structural advantages of the current shell-type transformer and core-type transformer, it can completely replace the traditional shell-type and core-type transformers. The invention also includes a new type of insulating part for insulating and protecting the winding ends of the transformer, which is mainly used in core transformers and shell transformers with interlaced windings, and can also be used in concentric transformers. Due to the invention of this new type of insulating component, a brand new winding end insulation structure and insulation protection method has been produced, which greatly improves the electric field distribution at the end of the high voltage winding, reduces the distance of the main magnetic flux leakage channel, and reduces the cost of the transformer. ...

Claims

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Application Information

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IPC IPC(8): H01F27/24H01F27/28H01F27/30H01F27/32H01F30/12
CPCH01F27/24H01F27/28H01F27/2823H01F27/306H01F27/324H01F30/12
Inventor 孙崇山
Owner 孙崇山
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