Emergency Lighting Control Circuit Capacity Optimization
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Solution Overview
Problem
Emergency lighting systems often require multiple discharge/charge cycles for the energy storage device to reach its nominal capacity, which is not achieved until after the first cycle, limiting the initial operating time and necessitating a method to optimize the capacity before commissioning tests.
Innovation Solution
A control circuit in the lighting system automatically performs at least one discharge/charge cycle after initial operation or when the energy storage device is changed, ensuring the capacity-increasing cycle is completed before the commissioning test, allowing the system to assess if the lighting duration meets the prescribed period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple discharge/charge cycles are performed to reach nominal capacity, then the energy storage capacity is improved, but the time required before commissioning test is extended
Solution Approach 1:
The control circuit automatically performs the discharge/charge cycle as a preliminary action before the commissioning test is triggered. This ensures the energy storage device reaches its nominal capacity beforehand, so that when the commissioning test is conducted, the full lighting duration can be achieved without extending the overall time required.
2Device complexity
If the commissioning test is performed before capacity optimization, then the testing process is simplified, but the initial operating time is insufficient
Solution Approach 1:
The system performs the capacity-optimizing discharge/charge cycle as a preliminary step before initiating the commissioning test. This ensures that when the test is conducted, the energy storage device is already optimized and can provide the full prescribed lighting duration, eliminating the need to extend the testing process.
3Productivity
If automatic discharge/charge cycle is implemented, then the capacity optimization is improved, but the control system complexity increases
Solution Approach 1:
The control circuit is designed to automatically detect when the energy storage device has been replaced or first installed, and autonomously initiates the discharge/charge cycle without requiring external intervention. The system monitors its own state and performs the optimization routine automatically, improving productivity while minimizing the need for additional control system complexity.
4Reliability
If the lighting system waits for capacity optimization before testing, then the lighting duration compliance is ensured, but the commissioning time is extended
Solution Approach 1:
The discharge/charge cycle is executed as a preliminary action during the commissioning process itself, rather than as a separate pre-requisite. This integration ensures that when the commissioning test is performed, the energy storage device has already been optimized to provide the full prescribed lighting duration, maintaining reliability compliance without extending the overall commissioning time.
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 extends the operating time of emergency lights by optimizing the energy storage capacity, ensuring reliable emergency lighting functionality and compliance with regulations by signaling the test results through the bus or optical/acoustic means.
Implementation Method 1
electrical energy storage means (3) which, controlled by the control circuit (1), can be charged from the supply voltage (5) or discharged via the light sources (2)
Implementation Method 2
discharged via the light sources (2)
Data Source
Figure 1
AI summary
The invention provides an emergency lighting control device for supplying light sources, in particular emergency lighting light sources, comprising a connection for a supply voltage, a control circuit, and electrical energy storage means which can be charged or discharged via the light sources controlled by the control circuit starting from the supply voltage, wherein the control circuit is designed to automatically perform at least one charge/discharge cycle of the energy storage means after the initial commissioning of the energy storage means, before the control circuit initiates a commissioning test in which the control circuit detects, by operating the light sources, whether the light sources can be operated for a prescribed period of time.