Voltage Sensor Housing with Floating Top and Grounded Sides
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Solution Overview
Problem
Existing voltage sensors, such as inductive voltage transformers, capacitive voltage transformers, and resistive dividers, face limitations including inability to measure AC and DC voltage simultaneously, requirement for direct wiring, poor stability over time and temperature, power loss, and susceptibility to electromagnetic noise and interference.
Innovation Solution
A voltage sensor housing with a conductive top portion electrically floating and conductive side portions electrically grounded, which houses a voltage sensor assembly capable of measuring AC and DC voltage without direct wiring, and reduces noise and interference by using a non-conductive housing with conductive components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conductive housing is used to shield electromagnetic interference, then noise reduction is improved, but electrical discharge risk increases
Solution Approach 1:
The housing employs different material properties in different regions: conductive portions (metal) for electromagnetic shielding and non-conductive portions (plastic) for electrical isolation. This local differentiation allows the housing to simultaneously provide EMI shielding while preventing electrical discharge to the sensor.
Solution Approach 2:
The housing is constructed as a composite structure combining conductive and non-conductive materials. The conductive portions provide electromagnetic shielding, while the non-conductive portions provide electrical isolation, creating a multi-functional housing that addresses both EMI protection and electrical safety requirements.
2Object-affected harmful factors
If a complete conductive enclosure is used for shielding, then electromagnetic noise reduction is improved, but measurement accuracy deteriorates due to interference with electric field sensing
Solution Approach 1:
The housing provides selective shielding by using conductive portions oriented to block external electromagnetic noise while leaving the sensor's measurement path open. The non-conductive portions allow the electric field to pass through to the sensor, ensuring accurate voltage measurement while maintaining EMI protection.
3Measurement precision
If direct wiring is used to connect voltage sensor to circuit, then measurement capability is improved, but safety and isolation deteriorate
Solution Approach 1:
The housing acts as an intermediary barrier between the voltage sensor and the high-voltage circuit. The non-conductive portions of the housing provide electrical isolation, allowing the sensor to measure voltage through capacitive coupling without direct physical contact, thereby maintaining both measurement capability and electrical safety.
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
The solution enables accurate measurement of voltage across a wide range, reduces power loss, and minimizes electromagnetic interference, allowing for stable and efficient operation in varying voltage conditions.
Implementation Method 1
conductive side portions composed of conductive material and being disposed adjacent to the side portions, wherein the conductive top portion is electrically floating and the conductive side portions are electrically grounded
Data Source
AI summary
A voltage sensor housing includes a top portion including a conductive top portion composed of conductive material and non-conductive top portions composed of non-conductive material, a bottom portion composed of non-conductive material, side portions composed of non-conductive material, wherein the top portion the bottom portion and the side portions define an interior area structured to hold a voltage sensor, and conductive side portions composed of conductive material and being disposed adjacent to the side portions. The conductive top portion is electrically floating and the conductive side portions are electrically grounded.