Power Supply Device With Constant Current Circuit For LED Lighting
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Solution Overview
Problem
In LED lighting apparatuses, excess output from LED luminaires connected in parallel can lead to a decrease in voltage supplied to other devices, causing them to stop functioning, as existing solutions fail to effectively manage this issue.
Innovation Solution
A power supply device with LED driving circuits connected in parallel, incorporating a constant current circuit between the DC supply and LED driving circuits, which limits current output and includes a voltage monitor and light emission controller to prevent voltage drops, ensuring a stable voltage supply to other devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LED driving circuits are connected in parallel to a DC supply, then multiple LED luminaires can be driven simultaneously, but excess output from simultaneous light emission causes voltage decrease that stops other devices from operating
Solution Approach 1:
A constant current circuit is introduced as an intermediary component between the DC supply and the LED driving circuits. This intermediary limits the current flowing to the LED luminaires, preventing excessive power consumption that would cause voltage drops affecting other devices connected to the same DC supply.
Solution Approach 2:
The patent changes the electrical parameter control by implementing constant current limitation instead of constant voltage supply. By controlling the current parameter through the constant current circuit, the system prevents power surges that occur when multiple LED luminaires emit light simultaneously, thereby maintaining stable voltage for other devices.
2Power
If excess output occurs from LED luminaires, then power consumption increases, but this causes voltage drop that prevents other devices from receiving necessary voltage
Solution Approach 1:
The constant current circuit serves as a mediator that decouples the power consumption of LED luminaires from the voltage supply stability. It allows high power output to LED luminaires while preventing this from causing voltage drops that would affect other devices, by actively regulating current flow.
Solution Approach 2:
The system implements feedback control through the constant current circuit, which continuously monitors and adjusts the current flowing to LED driving circuits. This feedback mechanism ensures that power consumption is kept within limits that maintain stable voltage for other devices, resolving the contradiction between high power output and voltage stability.
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 prevents momentary voltage drops in other devices, allowing them to operate continuously even during excess output states by limiting power to LED driving circuits and maintaining a predetermined DC voltage supply.
Implementation Method 1
a current outputted from the constant current circuit is kept at a predetermined value. This limits power supplied from the DC supply to the LED driving circuits and the LED luminaires via the constant current circuit
Data Source
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AI summary
Provided is a power supply device, which, even if an excess in output occurs on an LED lighting device side, is capable of preventing a drop in the voltage supplied to another machine that is connected aside from the LED lighting devices, and continues driving the other machine. This power supply device is equipped with a plurality of LED drive circuits provided in parallel, corresponding respectively to a plurality of LED lighting instruments, and are constituted in such a manner as to drive each of the LED lighting instruments in a predetermined light-emission mode. The plurality of LED drive circuits, along with the other machine aside from the plurality of LED drive circuits, are connected to a DC supply unit having such constitution that a direct current power supply voltage is converted into a predetermined direct current voltage and supplied thereby. The power supply device is further provided with a constant current circuit whereof the input side is connected to the DC supply unit and the other machine, and the output side is connected to the plurality of LED drive circuits.