Pressing Plates for Clamping Magnetizable Core Halves
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Solution Overview
Problem
Existing electric devices with air-cooled iron cores cannot stably hold cores consisting of two halves, leading to inefficiencies and assembly complexities.
Innovation Solution
The core is arranged between two opposing pressing plates with tension elements that apply force parallel to the core and windings, allowing for stable fixation of core halves that can touch or have an air gap, eliminating the need for additional assembly components and using non-conductive materials for cost-effective and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional holding arrangements are used, then single-piece cores can be held, but cores consisting of two halves cannot be stably held
Solution Approach 1:
The core is divided into two separate halves that can be assembled around the windings, allowing the core to be manufactured and assembled in a modular fashion while still achieving stable holding through the pressing plates
Solution Approach 2:
The pressing plates and tension elements provide a universal holding mechanism that can accommodate both single-piece cores and cores consisting of two halves, making the electric device adaptable to different core configurations
2Reliability
If additional assembly components are used to hold core halves, then stability is improved, but device complexity and cost increase
Solution Approach 1:
The holding function is merged into the existing structural components (pressing plates and tension elements) that are already necessary for winding fixation, eliminating the need for separate holding components and reducing overall device complexity
Solution Approach 2:
The pressing plates and tension elements serve dual purposes: both securing the windings to the core and providing stable holding for cores consisting of two halves, thereby reducing the total number of components required
3Strength
If metal clamping elements are used to fix core halves, then mechanical strength is improved, but eddy current losses increase
Solution Approach 1:
Electrically non-conductive pressing plates and tension elements are introduced as intermediary components that provide the necessary mechanical holding force while preventing eddy current formation, thereby reducing energy losses
Solution Approach 2:
The patent uses electrically non-conductive materials (such as fiber-reinforced plastics) instead of conductive metals for clamping elements, sacrificing some electrical conductivity to achieve the primary goal of reducing eddy current losses while maintaining sufficient mechanical strength
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 solution enables a stable, cost-effective, and easily assembled electric device with reduced losses from eddy currents, improved assembly efficiency, and enhanced magnetic circuit stability.
Implementation Method 1
tension elements for clamping the core extend between two pressing plates which are situated opposite one another
Implementation Method 2
the core forms a closed magnetic circuit which has been found to be particularly expedient
Implementation Method 3
pressing plates and tension elements advantageously consist of an electrically non-conductive material, for example a fiber-reinforced plastic
Data Source
AI summary
An electric device, for example a track transformer, connects to a high-voltage line. The electric device has a magnetizable core, at least one winding which is arranged in the vicinity of the core, and a housing which is filled with an insulating fluid and in which at least one winding is arranged. The core is arranged at least partly outside of the housing. In order to allow a stable mounting of a core formed of two halves, the core is arranged completely between two opposing pressing plates, between which tension elements for clamping the core extend.