Integrated Sensor Bushing for Compact HV Measurement
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Solution Overview
Problem
Existing bushings for high voltage and current measurements are bulky due to the need for separate voltage and current sensors, which complicates compact design and increases manufacturing variability, as each sensor type requires different arrangements and embodiments.
Innovation Solution
A bushing design incorporating an elongate electrical conductor, an insulation layer, an electrically conducting sleeve, and a ring-shaped printed circuit board with electrical components, where the sleeve and printed circuit board are embedded in the insulation layer, allowing for various sensors to be integrated without altering the bushing design, and featuring a protective layer and additional shielding to mitigate electrical and magnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate voltage and current sensors are used for high voltage and current measurements, then measurement functionality is achieved, but the bushing size increases and design complexity increases
Solution Approach 1:
The patent combines multiple sensor types (voltage sensor, current sensor, temperature sensor) into a single integrated bushing structure. The sensors are arranged concentrically with different sensing elements positioned at different radial distances from the central conductor, allowing simultaneous voltage and current measurements within one compact bushing rather than requiring separate devices.
Solution Approach 2:
The bushing is designed as a multi-functional device that can simultaneously perform voltage measurement, current measurement, and temperature monitoring. The universal design accommodates different sensor types within a single structure, eliminating the need for multiple separate bushings or measurement devices.
2Adaptability or versatility
If different sensor types are embedded in the bushing, then comprehensive measurement is achieved, but the number of parts to be kept in stock increases
Solution Approach 1:
The bushing employs a universal design that can accommodate multiple sensor types through a standardized concentric arrangement. The same basic bushing structure supports voltage sensors, current sensors, and temperature sensors simultaneously, reducing the need for multiple specialized bushing designs and simplifying inventory management.
3Volume of moving object
If sensors are arranged concentrically in the insulation layer, then compact design is achieved, but the length of the bushing increases
Solution Approach 1:
The patent transitions from a linear arrangement of sensors to a concentric radial arrangement around the central conductor. By organizing sensors in radial dimensions rather than extending them axially, the design achieves compactness in the radial direction while minimizing the increase in axial length, effectively utilizing three-dimensional space efficiently.
Data Source
AI summary
A bushing includes: an elongate electrical conductor; an insulation layer arranged around the elongate electrical conductor; an electrically conducting sleeve coaxially arranged with the electrical conductor; and a ring shaped printed circuit board with electrical components coaxially arranged around the electrical conductor. The sleeve and the printed circuit board are embedded in the insulation layer. The ring shaped printed circuit board is positioned in an axial direction between both ends of the electrically conducting sleeve.