Hybrid Dimming Controller With Isolated Class 1 and Class 2 Outputs

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Solution Overview

Problem

Existing dimming controllers for lighting systems lack flexibility in routing dimming signals between NEC class 1 and class 2 circuits, requiring separate cables and conduits, which limits installation options.

Innovation Solution

A hybrid dimming controller providing isolated class 1 and class 2 outputs, allowing the same dimming-control signal to be transmitted through either class 1 or class 2 cables, using a transformer to generate suitable signals for both classes while maintaining circuit isolation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a controller provides only class 2 outputs for dimming signals, then the installation can be simplified by routing cables outside conduit, but the flexibility to use class 1 circuits with higher voltage and current capacity is lost

Engineering Contradiction:

ImproveInstallation flexibilityVSAvoidCircuit type options

Core Design Contradiction:

Ease of operationVSAdaptability or versatility

Solution Approach 1:

The controller is designed with multiple output types (both class 1 and class 2 outputs) to perform multiple functions. This allows the same controller to support different installation scenarios and circuit requirements, providing versatility while maintaining ease of installation for each specific case

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If class 1 and class 2 circuits are isolated from each other, then safety requirements are met, but the complexity of the controller design increases due to multiple isolated output circuits

Engineering Contradiction:

ImproveCircuit isolation safetyVSAvoidController circuit design

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The controller internally segments isolated class 1 and class 2 output circuits while maintaining external integration. This segmentation allows each circuit type to meet its specific safety and electrical requirements independently, while the overall controller design remains unified and manageable

Inventive Principle:

Principle #1Segmentation

3Reliability

If separate cables are used for class 1 and class 2 circuits, then NEC code compliance is ensured, but the installation process becomes more complex requiring different routing methods

Engineering Contradiction:

ImproveNEC code complianceVSAvoidInstallation process

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The controller provides universal output compatibility by offering both class 1 and class 2 outputs, allowing installers to choose the appropriate cable type and routing method based on specific installation requirements while ensuring NEC code compliance for each scenario

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12004282B2Hybrid dimming controller with multi-class outputs

Publication Date: 2024.06.04 THE WATT STOPPER

AI summary

A hybrid dimming controller for a lighting control system providing isolated class 1 and class 2 dimming outputs. The controller has two NEC class 1 outputs for providing independent low-voltage dimming-control signals for two lighting loads and two NEC class 2 outputs for providing the same two independent dimming control-signals for the lighting loads. Thus, the controller has both a class 1 and a class 2 outputs for delivering the same dimming-control signal for each of the two lighting loads while maintaining within the controller the isolation that is required between class 1 and class 2 circuits.