Dynamic Voltage Control for Power Backup in Image Forming Devices
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Solution Overview
Problem
The existing power control devices in image forming devices require large-capacity electrolytic capacitors to ensure sufficient power for data backup during a prolonged power outage, leading to increased costs and device size.
Innovation Solution
A power control device that reduces the voltage of the driving power from the AC/DC converter to 15V when the AC power source stops, increasing the conversion efficiency of the DC/DC converter and extending the backup period without the need for a larger smoothing capacitor, thus maintaining data backup efficiency while reducing costs and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a large-capacity electrolytic capacitor is used as the smoothing capacitor of the AC/DC converter to ensure sufficient power for data backup, then the backup period is extended, but the cost and device size increase
Solution Approach 1:
The patent changes the voltage parameter of the first voltage converter output from the standard 24V to 15V. This parameter change increases the conversion efficiency of the second voltage converter, allowing it to operate more efficiently during power outages. The 15V output voltage is specifically designed to match the optimal input voltage range for the second voltage converter, thereby extending the backup period without requiring a larger capacitor.
Solution Approach 2:
The patent introduces dynamic voltage control where the first voltage converter dynamically adjusts its output voltage based on the operating conditions. During normal operation, it outputs 24V, but during power outages, it switches to 15V output. This dynamic adjustment optimizes the overall system efficiency and extends the backup period by ensuring the second voltage converter receives power at the most efficient voltage level.
2Duration of action of stationary object
If a large-capacity electrolytic capacitor is used as the smoothing capacitor of the AC/DC converter to ensure sufficient power for data backup, then the backup period is extended, but the cost increases
Solution Approach 1:
The patent changes the voltage parameter of the first voltage converter output from the standard 24V to 15V. This parameter change increases the conversion efficiency of the second voltage converter, allowing it to operate more efficiently during power outages. The 15V output voltage is specifically designed to match the optimal input voltage range for the second voltage converter, thereby extending the backup period without requiring a larger capacitor.
Solution Approach 2:
The patent introduces dynamic voltage control where the first voltage converter dynamically adjusts its output voltage based on the operating conditions. During normal operation, it outputs 24V, but during power outages, it switches to 15V output. This dynamic adjustment optimizes the overall system efficiency and extends the backup period by ensuring the second voltage converter receives power at the most efficient voltage level.
3Productivity
If the voltage of the first voltage converter output is maintained at 24V, then the system operates normally, but the backup period during power outages is insufficient
Solution Approach 1:
The patent introduces dynamic voltage control where the first voltage converter dynamically adjusts its output voltage based on the operating conditions. During normal operation, it outputs 24V, but during power outages, it switches to 15V output. This dynamic adjustment optimizes the overall system efficiency and extends the backup period by ensuring the second voltage converter receives power at the most efficient voltage level.
Solution Approach 2:
The patent changes the voltage parameter of the first voltage converter output from the standard 24V to 15V. This parameter change increases the conversion efficiency of the second voltage converter, allowing it to operate more efficiently during power outages. The 15V output voltage is specifically designed to match the optimal input voltage range for the second voltage converter, thereby extending the backup period without requiring a larger capacitor.
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 extends the backup period for data backup in image forming devices, ensuring sufficient power is supplied during outages without increasing the electrostatic capacity of the capacitor, thereby reducing overall costs and device size.
Implementation Method 1
a power accumulator (C221) configured to accumulate a part of power from the power source
Implementation Method 2
a first voltage converter configured to receive power from the power source and the power accumulator, perform voltage conversion to a first target voltage
Data Source
AI summary
A power control device receiving supply of power from a power source, the power control device including: a power accumulator accumulating a part of power from the power source; a first voltage converter receiving power from the power source and the power accumulator, performing voltage conversion to a first target voltage, and supplying power with the first target voltage to a first load; a second voltage converter receiving power from the first voltage converter, performing voltage conversion to a second target voltage, and supplying power with the second target voltage to a second load; a power source monitor monitoring power from the power source; and a power controller lowering the first target voltage to a level that the second voltage converter is capable of converting to the second target voltage when the power source monitor detects that the supply of power from the power source has stopped.