Power Supply Device with Oscillator for Low-Consumption Bulb Compatibility
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Solution Overview
Problem
Existing power supply devices connected in parallel with control switches struggle to prevent illumination or flickering of low-consumption LED or fluorescent bulbs when the switch is open, as they require very low current, and reducing supply current can lead to device malfunction.
Innovation Solution
A power supply device comprising a voltage converter, an oscillator, and an electronic regulation module that generates adjustable voltage pulses, allowing for fine control of output voltage and ensuring compatibility with low-consumption bulbs by drawing AC input voltage when the switch is open and supplying output voltage when closed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the supply current to the device is reduced to prevent illumination of low-consumption bulbs, then the illumination of the bulb is prevented, but the device may malfunction or cease to function
Solution Approach 1:
The patent employs an astable oscillator to generate control pulses with a very low duty cycle, delivering power to the device in periodic bursts rather than continuous current. This periodic action allows the device to receive sufficient total energy to function reliably while the instantaneous current remains low enough to prevent LED bulb illumination, resolving the contradiction between preventing bulb light and maintaining device operation.
2Illumination intensity
If an astable oscillator is used to generate control pulses with very low duty cycle, then the illumination of the bulb is prevented, but fine adjustment of the control pulses is not possible
Solution Approach 1:
The patent introduces an electronic regulation module that dynamically adjusts the duty cycle of the control pulses generated by the astable oscillator. This regulation module allows fine-tuning of the pulse parameters (width, frequency, amplitude) to optimize both the prevention of bulb illumination and the proper functioning of the connected device, transforming the fixed low-duty-cycle approach into an adaptable system that can be precisely controlled.
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 effectively prevents illumination of low-consumption bulbs when the switch is open and ensures continuous power supply, with high efficiency and minimal losses, making it suitable for devices like sensors, indicator lights, and timers.
Implementation Method 1
a voltage converter (CONV) which can be: of the voltage step-down type, of the voltage step-down-boost type, or of the 'flyback' type
Data Source
Figure 1~2A
Figure 2B~2C
Figure 2D~3A
AI summary
The invention relates to a power supply device comprising a first input terminal (IN1) and a second input terminal (IN2) between which an alternating input voltage is applied, said device comprising: - An oscillator (OSC) connected to its first input terminal and to its second input terminal and arranged to generate control pulses, - A voltage converter (CONV), controlled by said control pulses generated by said oscillator between a conduction state and a blocking state and arranged to provide, in the conduction state, a continuous output voltage (Vout) from said input voltage from electric current pulses, - Said oscillator (OSC) being adapted to generate control pulses adapted in number and duration so as to limit the amplitude of each generated electric current pulse below a threshold value.