AC-DC Power Booster for LED Illumination with EMI Filtering
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Solution Overview
Problem
Existing power systems for LED illumination are vulnerable to over-voltage and over-current, noise, and surge voltage, leading to inefficiencies and potential damage, while primarily using AC power without leveraging the benefits of DC power for energy reduction and extended lifespan of illumination instruments.
Innovation Solution
An AC-DC power booster with an EMI filter, PFC circuit, SMPS, MPPT, and inverter, along with a power control module that manages AC and DC power, allows for efficient use of LED illumination instruments, reduces power consumption, and provides emergency power using solar or vehicle energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If AC power is used for LED illumination, then power delivery is reliable, but power consumption is high and lifespan is reduced due to over-voltage and over-current vulnerability
Solution Approach 1:
The patent converts the power type parameter from AC to DC, changing the fundamental electrical characteristic to match LED requirements. This parameter change enables lower power consumption and extended lifespan while maintaining reliable power delivery through controlled DC supply.
Solution Approach 2:
The patent introduces a power converter as an intermediary device between the AC power source and LED illumination. This mediator converts AC power to DC power, protecting LEDs from over-voltage and over-current while enabling efficient power delivery and extended operational lifespan.
2Reliability
If AC power is used for LED illumination, then power delivery is reliable, but LEDs are vulnerable to over-voltage and over-current damage
Solution Approach 1:
The patent changes the power type parameter from AC to DC, eliminating the harmful effects of AC frequency and voltage fluctuations on LEDs. This parameter transformation protects LEDs from over-voltage and over-current damage while maintaining stable power delivery.
Solution Approach 2:
The power converter serves as an intermediary that filters and regulates power before delivering it to LEDs. This mediator protects LEDs from harmful AC power variations including over-voltage and over-current, while ensuring reliable and stable power supply.
3Loss of energy
If SMPS type power converting devices are used, then power conversion efficiency is improved, but noise and surge voltage cause defects and damage
Solution Approach 1:
The patent acknowledges the efficiency benefits of SMPS but converts its harmful output (noise and surge voltage) into a beneficial controlled DC output. By adding filtering and regulation stages, the system transforms the noisy SMPS output into clean, stable DC power that protects rather than damages LEDs.
Solution Approach 2:
The patent introduces additional intermediary components (filters and regulators) between the SMPS and LED load. These intermediaries clean up the noisy output from the efficient SMPS converter, removing surge voltage and noise while preserving the power conversion efficiency benefits.
4Use of energy by moving object
If DC power is used for illumination, then energy consumption is reduced and lifespan is extended, but DC power is not easily transmitted
Solution Approach 1:
The patent uses a power converter as an intermediary that bridges the transmission advantage of AC power with the efficiency advantage of DC power. The converter receives easily transmittable AC power and converts it to efficient DC power for LED illumination, combining the benefits of both power types.
Solution Approach 2:
The patent changes the power type parameter from AC to DC at the point of use through a power converter. This parameter change enables LEDs to operate with reduced energy consumption and extended lifespan, while the AC power infrastructure maintains its transmission advantages.
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 manages AC and DC power to increase the lifespan of LED illumination instruments, reduce energy consumption, and provide reliable emergency power, neutralizing noise and ensuring efficient operation of AC and DC appliances.
Implementation Method 1
an electromagnetic interference (EMI) filter circuit that is included to convert AC power from among applied AC power and DC power, to DC power to be output
Implementation Method 2
a power factor correction (PFC) circuit that is connected to the EMI filter circuit and stabilizes a predetermined output voltage
Implementation Method 3
a switching mode power supply (SMPS) circuit that is connected to the PFC circuit and applies the DC power of the PFC circuit to a drain of the SMPS circuit through a transformer, the SMPS circuit being capable of generating AC and DC power at the same time
Implementation Method 4
an inverter that uses a synchronization signal of an emergency energy source as an oscillation signal and operates an AC home appliance with the power received in the battery
Data Source
AI summary
The AC-DC power booster includes an electromagnetic interference (EMI) filter circuit that is included to convert alternating current (AC) power from among applied AC power and direct current (DC) power, to DC power to be output; a power factor correction (PFC) circuit that is connected to the EMI filter circuit and stabilizes an output voltage; and a switching mode power supply (SMPS) circuit that is connected to the PFC circuit and is capable of generating AC and DC power at the same time; a maximum power point tracking (MPPT) circuit that applies the voltage output from the SMPS circuit between a drain and a source of a switching device; a battery that is charged by receiving power from a solar light energy source connected to the MPPT circuit; and an inverter that operates an AC home appliance with the power received in the battery.