LED Power Converter with Automatic Electrical Strength Adaptation
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Solution Overview
Problem
The increasing diversity of LED lighting devices requires multiple control elements, leading to increased costs and inventory for lamp manufacturers, as existing solutions lack adaptability to different LED specifications, resulting in potential errors during manual current adjustments.
Innovation Solution
A power converter for LED lighting devices incorporating a primary side circuit, secondary side circuit, detecting circuit, load-dependent circuit, and feedback circuit, which automatically adjusts electrical strength based on feedback signals to adapt to various LED devices, reducing the need for manual adjustments and improving mounting efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple control elements are added to support different LED lamp brands, then the adaptability to various LED lighting devices is improved, but the device complexity and inventory costs increase
Solution Approach 1:
The patent implements a universal control element that can support multiple LED lamp brands through automatic adaptation. The control element includes a detecting circuit that automatically detects LED lamp parameters (such as forward voltage and current characteristics) and adjusts control parameters accordingly. This eliminates the need for multiple specialized control elements for different LED brands, achieving multi-functionality with a single universal design.
2Adaptability or versatility
If manual current adjustment is performed to adapt to different LED lighting devices, then the adaptability is improved, but the probability of errors and time consumption increase
Solution Approach 1:
The control element incorporates automatic detection and adaptation functions that enable it to self-configure for different LED lighting devices. The detecting circuit automatically measures LED parameters and the control element autonomously adjusts control parameters without requiring manual intervention. This self-service capability eliminates human error in manual adjustment while maintaining high adaptability to various LED devices.
3Adaptability or versatility
If manual current adjustment is performed for each LED lighting device, then the adaptability to different devices is improved, but the mounting efficiency decreases
Solution Approach 1:
The control element performs preliminary automatic detection and parameter configuration when first connected to an LED lighting device. The detecting circuit pre-measures LED characteristics and the control element pre-adjusts optimal control parameters before actual operation begins. This preliminary action eliminates the need for time-consuming manual adjustment during the mounting process, significantly improving mounting efficiency while maintaining full adaptability to different LED devices.
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 power converter automatically adjusts to match the electrical strength of different LED lighting devices, minimizing errors and enhancing the efficiency of LED lighting device mounting by eliminating the need for manual current adjustments.
Implementation Method 1
The secondary side circuit includes a first winding and a second winding. Two ends of the first winding are respectively coupled to a first node and a second node. The second winding is coupled to a third node. The secondary side circuit is configured to output a first output voltage at the first node and output a second output voltage at the third node, according to the duty cycle of the primary side circuit.
Implementation Method 2
The detecting circuit includes a main resistor, an auxiliary resistor, and an eighth capacitor. The main resistor is connected in series with the auxiliary resistor, the eighth capacitor is connected in parallel with the main resistor and the auxiliary resistor that are connected in series.
Implementation Method 3
The feedback circuit is coupled to the induction contact and configured to provide the feedback signal to the primary side circuit according to a detection signal.
Data Source
AI summary
A power converter for an LED lighting device includes a primary side circuit, a secondary side circuit, a detecting circuit, a load-dependent circuit, and a feedback circuit. The feedback circuit generates a feedback signal according to a detected signal which the detecting circuit generates according to a second node of the secondary side circuit. The primary side circuit adjusts a duty cycle according to the feedback signal. The secondary side circuit outputs a first output voltage at a first node of the secondary side circuit and outputs a second output voltage at a third node of the secondary side circuit, according to the duty cycle of the primary side circuit. The load-dependent circuit receives the second output voltage and controls an electrical strength between the first node and the second node of the secondary side circuit according to the first output voltage.