Power Conversion Circuit Load Detection Reduces Standby Loss
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Solution Overview
Problem
Power adapters experience significant power loss due to line impedance and continuous AC-to-DC conversion when disconnected from loads, failing to meet the requirements of low power consumption and high performance in an era of environmental protection.
Innovation Solution
A power conversion circuit comprising a driving circuit, an activating circuit, a converter, and an auxiliary power source that enables or disables the conversion based on load connection status, reducing power loss by controlling the conversion process only when the load is connected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the converter continuously converts AC power to DC power, then the power adapter can always provide power to the load, but power loss increases due to line impedance and continuous conversion
Solution Approach 1:
The power conversion circuit periodically checks load connection status and alternates between active conversion mode and standby mode. The controlling circuit enables the converter only when load connection is detected, and disables it when no load is connected, creating a periodic on-off action that reduces continuous power loss while maintaining reliability when needed.
Solution Approach 2:
The power adapter transitions from a static continuous conversion state to a dynamic state where the converter can be enabled or disabled based on real-time load detection. The activating circuit dynamically adjusts the converter's operational state, allowing the system to adapt its power consumption characteristics to actual usage conditions.
2Loss of energy
If the converter is disabled to reduce power loss, then power consumption decreases, but the ability to immediately power the load when connected is reduced
Solution Approach 1:
The controlling circuit performs preliminary detection of load connection status before enabling the converter. When a load is detected, the circuit prepares to activate the converter immediately, ensuring fast response. This preliminary monitoring action allows the system to maintain low power consumption in standby while being ready for rapid activation when needed.
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 reduces power loss by disabling the converter when the load is disconnected, minimizing unnecessary power consumption and aligning with the goals of low power loss and high performance.
Implementation Method 1
an AC-to-DC converter 101 is used for receiving the AC power from the utility power source 11 and rectifying and converting the utility power into DC power required for powering the load 12
Implementation Method 2
The auxiliary power source is electrically connected to the activating circuit and the driving circuit, and driven by the driving circuit to issue either a first control signal to the activating circuit if the load is connected with the power conversion circuit or a second control signal to the activating circuit if the load is disconnected from the power conversion circuit
Data Source
AI summary
A power conversion circuit includes a driving circuit, an activating circuit, a converter and an auxiliary power source. The activating circuit receives a first power signal. The converter is used for converting the first power signal into a second power signal. The auxiliary power source is electrically connected to the activating circuit and the driving circuit. The auxiliary power source is driven by the driving circuit to issue either a first control signal to the activating circuit if the load is connected with the power conversion circuit or a second control signal to the activating circuit if the load is disconnected from the power conversion circuit. In response to the first control signal, the first power signal is converted into the second power signal and the second power signal is transmitted to the load. In response to the second control signal, the converter is disenabled.