LED Lamp Fan Speed Control via Voltage Current Temperature Mapping
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Solution Overview
Problem
Existing LED cooling methods, such as reducing power or using cooling fans, lead to noise, reduced service life, and decreased light efficiency due to excessive heat production in LED lighting systems.
Innovation Solution
A method and system for controlling the rotational speed of a fan in LED lamps by measuring voltage and current, calculating the temperature, and adjusting fan speed based on preset relationships between voltage, current, temperature, and fan speed, allowing for precise control without additional sensors or components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If LED power is reduced to manage heat, then temperature is controlled, but lighting effect deteriorates
Solution Approach 1:
The invention extracts the heat dissipation function from the LED chip by introducing a separate cooling fan system. The fan actively removes heat from the LED chip, allowing the LED to operate at full power for optimal lighting effect while maintaining safe operating temperatures through dedicated thermal management.
2Temperature
If cooling fan runs at full speed continuously, then temperature is controlled, but noise increases and service life reduces
Solution Approach 1:
The invention implements dynamic fan speed control based on real-time LED chip temperature monitoring. The controller adjusts fan rotation speed according to actual thermal conditions, enabling the fan to operate at minimum necessary speed rather than constant full speed, thereby reducing noise and extending service life while maintaining effective cooling.
Solution Approach 2:
The system incorporates temperature feedback through monitoring units that continuously measure LED chip temperature and feed this information to the controller. The controller uses this feedback to dynamically adjust fan speed, creating a closed-loop control system that optimizes cooling efficiency while minimizing fan operation stress and noise.
3Temperature
If cooling fan is added to LED system, then temperature control improves, but device complexity increases
Solution Approach 1:
The controller serves multiple functions: it manages LED power output, monitors temperature through monitoring units, and controls fan speed based on thermal conditions. By integrating these diverse functions into a single control unit, the invention avoids adding separate dedicated components for each function, thereby limiting the increase in device complexity while achieving comprehensive temperature control.
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 reduces fan noise, extends the service life of both the fan and the LED lamp, while maintaining light efficiency without additional costs, by optimizing fan operation based on real-time temperature measurements.
Implementation Method 1
A fan for cooling the LED chip
Data Source
AI summary
A method for controlling the rotational speed of a fan of an LED lamp, comprising: presetting a corresponding relationship between a voltage, a current and a temperature for an LED chip in the LED lamp in the controller, as well as presetting a corresponding relationship between the temperature of LED chip and the speed of the fan in the controller, measuring the voltage and current of the LED chip, obtaining the current calculated temperature of the LED chip through the measured voltage and current, and further determining the current desired fan speed through the obtained current calculated temperature, using the controller to control the fan to rotate at the current desired speed, thereby cooling the LED chip. Additionally a corresponding system for controlling the rotational speed of the fan of an LED lamp and an LED lamp including the system.