Ballasted LED Lamp Drive Power Supply with Variable Energy Saving
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Solution Overview
Problem
Existing LED lamp drive power supplies face challenges in maintaining constant current or voltage due to temperature changes, leading to inefficient power regulation and reduced service life, and they often require complex EMC circuits and tap-based inductive ballasts that increase production costs and complexity.
Innovation Solution
A drive power supply for LC and inductive ballast LED lamps that eliminates the need for additional EMC circuits and tap-based designs, utilizing resistor and capacitor configurations to stabilize current and voltage across varying temperatures, and incorporates switch-based circuits to manage power efficiently without taps, thereby enabling variable power energy saving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional EMC circuits are added to meet GB17743 standards, then electromagnetic compatibility compliance is improved, but device complexity and production costs increase
Solution Approach 1:
The patent extracts and eliminates the need for separate EMC circuits by redesigning the power supply topology. The improved power supply circuit meets GB17743 electromagnetic compatibility standards without requiring additional EMC filtering components, thereby reducing device complexity while maintaining compliance.
Solution Approach 2:
The power supply circuit performs multiple functions simultaneously - it provides power conversion, inherent electromagnetic filtering, and meets EMC compliance requirements all within a single integrated circuit design, eliminating the need for separate dedicated EMC circuits.
2Adaptability or versatility
If tap-based inductive ballasts are used to achieve wide voltage operation, then adaptability to different voltages is improved, but manufacturing complexity and production costs increase
Solution Approach 1:
The patent replaces static tap-based voltage selection with a dynamic control approach. The improved power supply circuit automatically adapts to different input voltages through electronic control mechanisms, eliminating the need for manual tap selection and complex winding structures while maintaining wide voltage operation capability.
Solution Approach 2:
The patent substitutes the mechanical tap-switching system with an electronic control system. Instead of physically switching between different winding taps, the improved circuit uses electronic components and control logic to achieve voltage adaptation, significantly simplifying manufacturing and assembly processes.
3Stability of the object's composition
If constant current sources are used to drive LED lamps, then current stability is improved, but power efficiency deteriorates under temperature variations
Solution Approach 1:
The patent changes the control parameter from constant current to a dynamic current profile that adapts to temperature conditions. The improved power supply circuit monitors temperature variations and adjusts the output current accordingly, maintaining LED performance and efficiency across different temperature ranges rather than forcing constant current operation.
Data Source
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AI summary
The present invention provides a drive power supply of a ballast LED lamp with a variable power energy saving function. The technical solution of connecting a series circuit composed of a capacitor C1a, a capacitor C11 and a switch K11 and a series circuit composed of a capacitor C1b and a switch Ka to G and N ends of a bridge rectifier circuit is adopted. The solution enables a drive power supply of an LC ballast LED lamp to meet the requirements in terms in GB 17743 without increasing an EMC circuit, the circuit is simple, and the production cost can be saved. In a drive circuit of an inductive ballast LED lamp in which the impedance range of an inductive ballast Lz ranges from greater than 52 ohms to less than 360 ohms, the technical solution of connecting a series circuit composed of a capacitor C, a capacitor C1 and a switch K1 to D and N ends of the bridge rectifier circuit is adopted. The solution can improve the efficiency of production and assembly, reduce the production cost and further improve the efficiency of an inductive ballast drive power supply.