Fluorescent Lamp Control Circuit with Periodic Preheating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Fluorescent lamps face low power-saving efficiency and market competitiveness due to the limitations of single-function electronic ballasts, which cannot effectively manage power consumption and offer insufficient control over lighting conditions.
Innovation Solution
A lamp control system comprising a power conversion circuit and a preheat and lighting circuit, coupled with a system control unit, that converts DC signals to AC, preheats and activates fluorescent lamps, and uses feedback signals to manage operating modes, including preheating and lighting, to reduce energy consumption and enhance control capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a single-function electronic ballast is used to activate and control lighting current, then the lamp can be activated and lighting current can be controlled, but power saving efficiency is low and energy consumption is high
Solution Approach 1:
The electronic ballast is transformed from a single-function device into a multi-function control system that integrates activation, lighting current control, and power management functions. The system includes a power conversion unit with DC-AC conversion capability, a preheat and lighting circuit with resonant circuit, and a control unit that coordinates multiple operations, enabling the ballast to perform multiple functions simultaneously or sequentially to improve power saving efficiency while maintaining control versatility
2Reliability
If continuous preheating is applied to the fluorescent lamp, then the lamp can be reliably activated, but energy consumption increases and power saving efficiency decreases
Solution Approach 1:
The preheating operation is changed from continuous to periodic intermittent action. The control unit enables the preheat and lighting circuit to operate in periodic cycles, activating the lamp when needed and disabling the preheating function when the lamp is already activated or during normal operation. This periodic control maintains lamp activation reliability while significantly reducing energy consumption during non-activation periods
Solution Approach 2:
The system incorporates feedback control where the control unit monitors the lamp's activation state and adjusts the preheating operation accordingly. Based on feedback signals about whether the lamp is already activated or needs preheating, the control unit enables or disables the preheat and lighting circuit, ensuring reliable activation only when necessary and reducing energy consumption by avoiding redundant preheating
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 system achieves energy savings by optimizing the preheating and lighting processes, allowing for flexible control modes such as dimming and protection, thereby improving the competitiveness and efficiency of fluorescent lamps.
Implementation Method 1
The power conversion circuit, including a DC signal input terminal and an AC signal output terminal, converts a DC signal to an AC signal and output the AC signal
Implementation Method 2
When the feedback signal indicates the fluorescent lamp is in a preheat mode, a resonant circuit of the preheat and lighting circuit is enabled to preheat the fluorescent lamp via a current path provided by a diode bridge of the preheat and lighting circuit
Implementation Method 3
a resonant circuit of the preheat and lighting circuit is enabled to preheat the fluorescent lamp via a current path provided by a diode bridge of the preheat and lighting circuit
Data Source
AI summary
A power-saving method for a lamp power-saving system is provided. The method includes the following steps. A lamp control unit is provided to control a fluorescent lamp. The lamp control unit includes a power conversion circuit and a preheat and lighting circuit. The preheat and lighting circuit, coupled to the power conversion circuit and two terminals of the fluorescent lamp, preheats and activates the fluorescent lamp, and outputs a feedback signal indicating a current passing through the fluorescent lamp. When the feedback signal indicates the fluorescent lamp is in a preheat mode, a resonant circuit of the preheat and lighting circuit is enabled to preheat the fluorescent lamp via a current path provided by a diode bridge of the preheat and lighting circuit. When the feedback signal indicates the fluorescent lamp is lighted, the current path of the preheat and lighting circuit is disconnected to stop preheating.