Driveless LED Fixtures Centralized Power Distribution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional LED fixtures require expensive individual AC-DC driver circuits and large gauge wires for centralized power distribution, leading to high costs and inefficiencies in large installations, as each fixture needs its own power electronics and wiring for current regulation.
Innovation Solution
Centralizing AC-DC conversion and current control functions by grouping LED fixtures in series and using a central power unit that converts AC to DC at a higher voltage, reducing the need for individual drivers and minimizing line losses, with a failed LED bypass circuit to maintain system functionality in case of fixture failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual AC-DC driver circuits are used in each LED fixture, then current regulation is achieved, but system cost and device complexity increase significantly
Solution Approach 1:
Multiple LED fixtures are electrically connected in series to form a single string that shares one AC-DC driver circuit. This merging approach consolidates power conversion functions from individual fixtures into a centralized system, reducing the total number of drivers required while maintaining current regulation through the series connection topology
Solution Approach 2:
The single AC-DC driver circuit serves multiple LED fixtures simultaneously, performing power conversion and current regulation for the entire series string rather than individual fixtures. This multi-functional approach eliminates redundant components and reduces overall system complexity
2Power
If centralized AC-DC power source delivers high current at low voltage, then power distribution is achieved, but line losses increase and large gauge wires are required
Solution Approach 1:
The system transforms the electrical parameters for power distribution by delivering power at high voltage and low current through the series-connected LED fixtures. This parameter change from low-voltage/high-current to high-voltage/low-current distribution reduces resistive line losses and eliminates the need for large gauge wiring
3Device complexity
If LED fixtures are connected in series with centralized power, then system cost is reduced, but reliability decreases when fixtures fail
Solution Approach 1:
A bypass circuit acts as an intermediary component within each LED fixture that activates when the fixture fails. This bypass circuit provides an alternative current path around the failed fixture, allowing the series string to continue operating and preventing a single point of failure from shutting down the entire system
Solution Approach 2:
The bypass circuit is pre-installed in each fixture as a protective measure against future failures. This beforehand cushioning ensures that when a failure occurs, the system has already prepared an alternative path, maintaining continuity without requiring immediate repair or replacement of failed fixtures
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 approach significantly reduces system costs by eliminating the need for individual drivers and minimizing line losses, allowing up to 30% of fixtures to fail without affecting the rest of the system, while maintaining efficient power distribution.
Implementation Method 1
a central power unit is utilized to centralize the AC-DC conversion and current control functions
Implementation Method 2
The line losses are minimum since the voltage is high and current relatively low, less than 15 amps
Data Source
AI summary
A group of LED fixtures wherein power is delivered to each fixture in the group from central power unit thus eliminating the necessity of providing a separate power sauce to each fixture.