Power Supply Standby Power Reduction via Intermittent Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power supply apparatuses have high standby power consumption, leading to energy wastage during standby mode.
Innovation Solution
A power supply apparatus with a no-load detecting unit that turns off the output switch and power factor correction and pulse width modulation controller when an electronic device is removed, and uses an intermittent driving unit to periodically wake up the system to detect reconnection and recharge a discharging capacitor, minimizing power consumption during standby.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power supply apparatus remains in standby mode to maintain readiness for electronic apparatus connection, then the system can quickly respond to connection events, but the standby power consumption increases
Solution Approach 1:
The power supply apparatus employs periodic detection cycles where the no-load detecting unit intermittently checks for electronic apparatus connection status. The intermittent driving unit activates the start unit at predetermined intervals, which in turn activates the power factor correction and pulse width modulation controller to sense the secondary-side transformer coil. This periodic action allows the system to maintain detection capability while consuming minimal power during intervals between detections, resolving the contradiction between readiness and energy conservation.
2Measurement precision
If the no-load detecting unit continuously monitors the secondary-side transformer coil to detect electronic apparatus removal, then the detection accuracy improves, but the power consumption increases
Solution Approach 1:
The system implements periodic monitoring instead of continuous monitoring. The intermittent driving unit triggers the detection sequence at predetermined time intervals, allowing the no-load detecting unit to accurately sense the secondary-side transformer coil status only when needed. This approach maintains detection precision for identifying electronic apparatus removal while significantly reducing power consumption compared to continuous monitoring.
Solution Approach 2:
The power supply apparatus uses its existing operational components (power factor correction and pulse width modulation controller, secondary-side transformer coil) to perform the detection function. When the intermittent driving unit activates the start unit, these components naturally execute their normal operational cycles, which the no-load detecting unit monitors to infer connection status. This self-service approach eliminates the need for separate dedicated detection hardware, reducing overall power consumption while maintaining detection accuracy.
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
Significantly reduces standby power consumption by efficiently managing the power supply's sleep mode and reactivation, thereby conserving energy.
Implementation Method 1
The no-load detecting unit is configured to detect that the electronic apparatus is removed from the power supply apparatus by sensing the secondary-side transformer coil
Data Source
AI summary
An electronic apparatus is removed from a power supply apparatus and that can be certified by detecting a secondary-side transformer coil by a no-load detecting unit. The no-load detecting unit is configured to turn off an output switch unit and a power factor correction and pulse width modulation controller. An intermittent driving unit is configured to drive a start unit once a pre-determined time. The start unit is configured to drive the power factor correction and pulse width modulation controller. A load detecting unit is configured to detect that the electronic apparatus is connected to the power supply apparatus. The load detecting unit is configured to drive the intermittent driving unit. The intermittent driving unit is configured to drive the start unit. The start unit is configured to drive the power factor correction and pulse width modulation controller.