Power Control Device Voltage Adaptation
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Solution Overview
Problem
Conventional power control devices for electronic devices, such as video display devices, fail to operate properly when input voltage drops below 80V, leading to device shutdown and requiring manual reset upon voltage normalization.
Innovation Solution
A power control device with a rectifier, capacitors, and a switching mechanism that detects input voltage and adjusts voltage output to ensure continuous operation by charging capacitors during both voltage half-periods, maintaining a stable power supply even at lower input voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the electronic device is designed to operate above 80V to comply with voltage standards, then the device can operate in both 110V and 220V regions, but the device cannot operate normally when input voltage drops below 80V
Solution Approach 1:
The patent applies dynamics by making the capacitor connection configuration changeable based on input voltage conditions. The switching means dynamically reconfigures the capacitor connections between series and parallel states according to detected voltage levels, allowing the device to adapt to varying input voltages while maintaining stable operation
Solution Approach 2:
The patent changes the electrical parameters of the power supply system by altering capacitor connection configurations. By switching capacitors between series and parallel connections, the system changes its equivalent capacitance and voltage characteristics, enabling operation across different voltage ranges (above 80V and below 80V)
2Device complexity
If the power control device uses a fixed rectifier circuit, then the circuit structure is simple, but the device shuts down when input voltage fluctuates below the operating threshold
Solution Approach 1:
The patent introduces dynamic control through switching means that can reconfigure capacitor connections based on voltage detection results. This dynamic adjustment capability allows the fixed physical structure to achieve variable electrical characteristics, preventing shutdown during voltage fluctuations
Solution Approach 2:
The patent implements feedback control by using a voltage detection circuit to monitor input voltage levels and feed this information to the switching means. The switching means then adjusts capacitor connections based on the detected voltage, creating a closed-loop control system that maintains reliable operation
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
Enables electronic devices to operate continuously regardless of input voltage fluctuations, maintaining normal operation by automatically adjusting voltage levels to ensure a stable power supply.
Implementation Method 1
a rectifier including a plurality of diodes and a plurality of capacitors to purify a power applied in the power input portion and to output a smoothed voltage
Implementation Method 2
a capacitor C1 for smoothing the rectified voltage through the rectified diode BD
Implementation Method 3
a switching means to change a voltage supplied in the first capacitor and the second capacitor during the main/sub periods in compliance with a voltage level of a power applied in the power input portion
Data Source
AI summary
Provided is a power control device comprising; a power input portion to which an alternating current is supplied; a plurality of diodes for rectifying a power supplied from the power input portion; a first capacitor unit and a second capacitor unit for charging/discharging a power rectified in the diode to provide a smoothed voltage output; and a switching means to change a voltage supplied in the first capacitor and the second capacitor during the main/sub periods in compliance with a voltage level of a power applied in the power input portion.