PFC Circuit Control for Multi-Function Printer Power Saving
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Solution Overview
Problem
Existing multi-function printers face challenges in power-saving modes due to the suspension of PFC circuits, which can lead to increased power consumption when peripheral devices like fax units are attached, as the operation of PFC circuits is suspended to reduce power, but this results in harmonic component issues and increased power usage when resumed.
Innovation Solution
The control method for an information processing apparatus, such as a multi-function printer, dynamically controls the PFC circuit's operation based on the presence of optional peripheral devices like fax units, ensuring it remains active in power-saving mode when such devices are installed to prevent harmonic issues and excessive power consumption by monitoring and adjusting the PFC control signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the PFC circuit operation is suspended in power-saving mode, then power consumption is reduced, but harmonic components increase causing bad effects
Solution Approach 1:
The PFC control signal is made dynamic by changing its value based on detected power consumption levels. The control signal transitions between first and second values depending on whether power consumption is above or below a threshold, allowing the system to adapt between power-saving and harmonic-reduction modes
Solution Approach 2:
The invention changes the operational parameters of the PFC circuit by switching the PFC control signal between different values. When power consumption exceeds the threshold, the control signal changes to activate the PFC circuit, thereby changing the electrical parameters to reduce harmonic components
2Object-generated harmful factors
If the PFC circuit operation is maintained in power-saving mode, then harmonic components are reduced, but power consumption increases
Solution Approach 1:
The system dynamically adjusts PFC circuit operation based on real-time power consumption detection. The PFC control signal automatically switches between active and suspended states depending on whether the power consumption threshold is exceeded, optimizing both harmonic reduction and power efficiency
Solution Approach 2:
The invention implements a feedback mechanism where power consumption is continuously detected and used to control the PFC circuit operation. The detection unit monitors power consumption and feeds this information back to the control signal, creating a closed-loop system that automatically responds to changing power conditions
3Adaptability or versatility
If peripheral devices are added to the apparatus, then functionality is improved, but power consumption in power-saving mode increases
Solution Approach 1:
The system dynamically adapts its power management strategy based on peripheral device configuration. When peripheral devices are detected, the power consumption threshold is adjusted accordingly, allowing the PFC circuit to operate selectively to maintain both versatility and power efficiency
Solution Approach 2:
The invention changes the power consumption threshold parameter based on the configuration of peripheral devices. This allows the system to optimize PFC circuit operation for different device configurations, maintaining low power consumption while accommodating various peripheral attachments
Data Source
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AI summary
The information processing apparatus according to an embodiment of the present invention includes a power factor correction (PFC) circuit (207), an interface (304) capable of connecting an optional device, and a power controller (201) capable of turning off the PFC circuit. The power controller does not turn off the PFC circuit while a predetermined optional device is connected to the interface.