Stranded Wire Power Leads for Lamp Noise Reduction
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Solution Overview
Problem
Conventional high-current lamps with solid nickel wire power leads produce high noise or hum levels when used with electronic dimmers, which are uncomfortable and distracting for users.
Innovation Solution
Using stranded wire power leads instead of solid wire power leads, which reduces noise or humming levels by potentially canceling vibration effects, and incorporating a fuse within the power lead structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If solid nickel wire power leads are used, then ease of assembly and fabrication is improved, but noise or hum levels increase making users uncomfortable
Solution Approach 1:
The power lead is segmented from a single solid wire into multiple stranded wires. Each strand vibrates independently, and the vibrations cancel each other out, reducing the noise and hum levels while maintaining the electrical conductivity and ease of assembly properties of nickel wire.
2Object-generated harmful factors
If stranded wire power leads are used, then noise or hum levels are reduced, but device complexity increases
Solution Approach 1:
The power lead is segmented from a single solid wire into multiple stranded wires. Each strand vibrates independently, and the vibrations cancel each other out, reducing the noise and hum levels while maintaining the electrical conductivity and ease of assembly properties of nickel wire.
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 use of stranded wire power leads in high-current lamps significantly reduces objectionable noise or humming levels, improving user comfort and maintaining ease of assembly and fabrication.
Implementation Method 1
the multiple strands may cause cancellation of vibration as compared to having one solid wire that vibrates
Data Source
AI summary
A lamp (10) is formed of a lamp capsule (1) sealed with a press seal (2) penetrated by electrical lead-ins (12), the lamp (1) being received in an insulating base (16) that has external electrical pins (18). Power leads (20) interconnect respective capsule lead-ins (12) and base pins (18). Power leads (20) are formed of stranded wire having a plurality of intertwined strands.