Winding Unit Tapping on Support for Shielding Cage Enclosure
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Solution Overview
Problem
Existing winding units embedded in solid insulating bodies cannot be completely surrounded by a shielding cage due to conductors passing through the resin block, which compromises the shielding effect.
Innovation Solution
The tapping terminals are relocated to the support, allowing the connecting lines to be routed from the end face of the winding, enabling a shielding cage to enclose the winding unit completely, with rotationally symmetrical supports and ribs to increase the leakage current path and dielectric strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If tap terminals are located centrally within the resin block, then the winding unit can be compactly designed, but the shielding cage cannot completely enclose the winding
Solution Approach 1:
The tap terminals are relocated from the central region of the resin block to the peripheral support structure at the end face. This spatial relocation in a different dimension (from center to periphery) allows the shielding cage to completely enclose the winding while maintaining compact overall design.
Solution Approach 2:
The tap terminals are extracted from the central winding region and placed on the peripheral support. This extraction removes the obstacle that prevented complete shielding enclosure, allowing the shielding cage to form a closed structure around the winding.
2Ease of manufacture
If leads extend through the resin block to central tap terminals, then connection is simplified, but leakage currents can occur along the leads
Solution Approach 1:
The leads are extracted from the central resin block and routed along the peripheral support structure to the tap terminals. This relocation removes the leads from the high-voltage winding region, eliminating the leakage current path while maintaining electrical connection functionality.
Solution Approach 2:
The support structure serves as an intermediary medium that carries the leads from the winding end face to the externally accessible tap terminals. This intermediary path along the periphery avoids direct lead penetration through the resin block, preventing leakage currents.
3Ease of operation
If support structure is added to hold terminals, then terminal arrangement is improved, but device complexity increases
Solution Approach 1:
The support structure performs multiple functions simultaneously: it provides mechanical support for the tap terminals, serves as a routing path for the leads, and acts as a peripheral structural element of the winding unit. This multi-functionality reduces overall device complexity despite adding the support structure.
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 design allows for complete encapsulation of the high-voltage winding with a shielding cage, enhancing dielectric strength and preventing leakage currents, while maintaining adjustability of the number of turns between winding ends.
Implementation Method 1
the support is rotationally symmetrical and equipped with ribs extending radially to the longitudinal direction around its radial circumference... to increase the path for leakage currents and to suppress them as completely as possible
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a winding unit (10) for connecting to a high-voltage network. The winding unit has a winding (12), which is embedded in a solid insulating body (11), and a first main connection terminal (19), which is connected to a first winding end of the winding (12) and is arranged on a first support (1) formed on insulating body (11). Furthermore, a second main connection terminal (20) is provided, which is connected to a second winding end of the winding (12). The winding has partial windings (13, 14) and taps (17), by means of which the number of windings of the partial windings (13, 14) connected in series can be set. By means of outgoing lines (15, 16, 18) extending in the insulating body (11), the taps (17) are connected to a tap connection terminal (3, 4, 5, 6, 7, 8) accessible from the outside. In order to encapsulate the upper voltage in the resin block over the entire periphery by means of a shielding cage, according to the invention, the tap connection terminals (3, 4, 5, 6, 7, 8) are formed on the support (1).