Transformer Winding Cooling With Direct Insulating Fluid Distribution
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Solution Overview
Problem
Previously known traction transformers face inadequate cooling of windings due to their complementary boiler structure, leading to rapid heating of insulating fluid and limited operational power.
Innovation Solution
An insulating fluid line connects the inlet to a distribution unit at the winding arrangement, ensuring cooled fluid is directly introduced into the cooling channels, bypassing mixing with warmer fluid, and a distribution unit uniformly distributes the cooled fluid to improve winding cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cooled insulating fluid is introduced directly into the boiler without a distribution system, then the structure is simple, but the windings are inadequately cooled and the insulating fluid heats up quickly
Solution Approach 1:
The distribution unit segments the single inlet flow into multiple outlet channels, directing cooled insulating fluid to different regions of the windings simultaneously. This segmentation enables comprehensive cooling coverage without requiring complex individual piping for each winding section.
Solution Approach 2:
The distribution unit acts as an intermediary component between the inlet and the windings. It receives cooled insulating fluid from the inlet and uniformly distributes it through multiple outlets to the cooling channels surrounding the windings, ensuring efficient heat removal while maintaining structural simplicity.
2Ease of manufacture
If the boiler has a complementary shape structure, then the manufacturing is simplified, but the cooling of windings is inadequate
Solution Approach 1:
The distribution unit segments the cooling fluid flow into multiple directed streams that target specific winding regions. This allows the boiler to maintain its simple complementary shape while achieving adequate cooling through structured fluid distribution rather than complex boiler geometry.
Solution Approach 2:
The distribution unit provides localized cooling quality by directing cooled insulating fluid precisely to the cooling channels surrounding the windings. Different regions of the windings receive targeted cooling flow, ensuring adequate heat removal while the boiler itself maintains its manufacturing-simple complementary shape.
3Device complexity
If cooled insulating fluid mixes with warmer fluid in the boiler, then the circulation is simple, but the cooling efficiency decreases
Solution Approach 1:
The distribution unit performs preliminary distribution of cooled insulating fluid to the cooling channels before the fluid can mix with warmer fluid in the boiler. By delivering cool fluid directly to the windings first, the system maximizes cooling efficiency while maintaining simple circulation without requiring complex isolation mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This enhanced cooling allows the electric device to operate at higher electrical power levels, such as higher currents, by efficiently cooling the windings.
Implementation Method 1
a cooling unit and a pump for circulating the insulating fluid
Implementation Method 2
a pump for circulating the insulating fluid
Implementation Method 3
cooling channels are formed in the windings... cooled insulating fluid is routed directly to the distribution unit... distributes the cooled insulating fluid to the cooling channels
Data Source
AI summary
An electric device for connection to a high voltage includes an active part having a magnetizable core and at least one winding arrangement, each surrounding a core section of the core and having windings inductively coupled together, forming cooling channels in the windings. A boiler is filled with insulating fluid and the active part is completely disposed therein. The boiler has at least one insulating fluid inlet and at least one insulating fluid outlet interconnected by a circulation system outside of the boiler having a cooling unit and a pump for circulating the insulating fluid. The electric device has improved cooling achieved by each insulating fluid inlet being connected to a distributing unit, which is disposed on one of the end sides of the winding assembly, via an insulating fluid line extending in the boiler, the distributing unit distributing cooled insulating fluid to the cooling channels.