SMPS Blocking Unit for Residual Voltage Discharge
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Image forming apparatuses face challenges in efficiently powering on after being turned off, leading to potential errors or malfunctions due to incorrect voltage reset, especially when energy is re-supplied within a specific time frame, and existing power supplies do not effectively manage power consumption and light load efficiency.
Innovation Solution
A switching mode power supply (SMPS) with a transformer, switching unit, and blocking unit is designed to receive AC power, transform it into DC power, and adjust output based on the power supply state, including a blocking mechanism that discharges residual voltage to prevent premature rebooting and optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the SMPS allows rapid rebooting after power off, then the responsiveness is improved, but voltage reset errors and malfunctions occur
Solution Approach 1:
The blocking unit proactively blocks the driving voltage to the switching unit before a potential rapid reboot can occur. By detecting the power supply state and preemptively blocking voltage during the off state, the system prevents voltage reset errors from occurring during rapid reboot scenarios, thus maintaining reliability while allowing quick restart capability.
2Ease of operation
If the SMPS continuously supplies power to the switching unit, then the readiness for operation is improved, but power consumption increases
Solution Approach 1:
The blocking unit implements periodic control of power supply to the switching unit based on the power supply state. During the off state, power is blocked to reduce consumption; during the on state, power is supplied to maintain operational readiness. This periodic on/off power supply pattern reduces overall energy consumption while ensuring the system is ready to operate when needed.
3Device complexity
If the SMPS uses a simple power supply structure, then the device complexity is reduced, but light load efficiency deteriorates
Solution Approach 1:
The blocking unit automatically detects the power supply state and autonomously controls the power supply to the switching unit without requiring complex external control systems. This self-service mechanism achieves light load efficiency improvement through simple state-based blocking control, maintaining low device complexity while reducing energy loss during light load conditions.
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 SMPS ensures accurate voltage reset and reduces power consumption by blocking power input to the switching unit when the image forming apparatus is off, preventing errors during rebooting and enhancing light load efficiency.
Implementation Method 1
a transformer to transform an electric power input to a primary coil and to output the transformed electric power to a secondary coil
Implementation Method 2
a blocking unit to block an electric power input to the switching unit based on a supply state of an electric power to the image forming apparatus
Data Source
AI summary
A switching mode power supply (SMPS) usable with an image forming apparatus receives an alternating current (AC) power from an external electric power supply source and outputs a direct current (DC) power. When a supply state of an electric power to the image forming apparatus is turned off, electric charges charged in a capacitor of the SMPS are discharged.