Adapter Low Standby Loss via Load Detection Circuit
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Solution Overview
Problem
Current adapters experience high standby loss and slow, inaccurate auto-restarting when disconnected and reconnected to load apparatuses, leading to energy wastage and inefficiency.
Innovation Solution
The adapter incorporates a rectifying unit, power factor correction unit, standby circuit, load-connecting detection circuit, first and second power conversion circuits, and an auxiliary voltage control circuit, where the first and second ground sides are connected to different grounds, preventing power conversion until the load is connected, thereby minimizing standby loss and ensuring quick and accurate re-starting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the adapter maintains circuit readiness in standby mode for quick re-start, then the auto re-start speed is improved, but the standby loss increases causing energy wastage
Solution Approach 1:
The adapter performs preliminary actions by maintaining only the necessary control circuits and detection circuits in standby mode, while shutting down the main power conversion circuits. This allows the adapter to be prepared for quick re-start without maintaining full power conversion readiness, thus reducing standby loss while preserving auto re-start capability.
Solution Approach 2:
The invention extracts and separates the essential standby functions (detection circuit, control circuit) from the non-essential functions (main power conversion circuits). By taking out only the necessary components for standby operation, the adapter achieves low standby loss while maintaining the ability to quickly restart when load is detected.
2Loss of energy
If the adapter shuts down completely in standby mode to reduce energy consumption, then the standby loss is reduced, but the auto re-start capability becomes slow and inaccurate
Solution Approach 1:
The invention introduces an intermediary detection circuit that monitors the load connection status without requiring full power conversion operation. This intermediary circuit acts as a mediator between the completely shutdown state and the full operation state, enabling accurate detection of load connection while maintaining minimal energy consumption in standby mode.
Solution Approach 2:
The adapter employs feedback mechanisms where the detection circuit continuously monitors the load connection status and provides feedback to the control circuit. When load connection is detected, the feedback signal triggers the power conversion circuits to start, ensuring accurate and reliable auto re-start capability while maintaining low standby loss during the monitoring phase.
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
This configuration reduces standby loss to less than 0.5 watt and enables quick and accurate auto-restarting by only powering the adapter when the load is connected, minimizing energy consumption during standby and ensuring rapid reactivation.
Implementation Method 1
the adapter receives and converts the alternating current power into the direct current power
Implementation Method 2
a power factor correction unit, a standby circuit, a load-connecting detection circuit, a first power conversion circuit
Implementation Method 3
the first power conversion circuit and the second power conversion circuit start to convert the first voltage into the first output voltage and the second output voltage
Data Source
AI summary
An adapter includes a rectifying unit, a power factor correction unit, a standby circuit, a load-connecting detection circuit, a first power conversion circuit, a second power conversion circuit and an auxiliary voltage control circuit. When a load apparatus is connected to the adapter, a first ground side of the first power conversion circuit is short-circuited to a second ground side of the second power conversion circuit, so that the load-connecting detection circuit is turned on and sends out a first signal. After the auxiliary voltage control circuit receives the first signal, the auxiliary voltage control circuit is turned on to drive the first power conversion circuit and the second power conversion circuit, so that the first power conversion circuit and the second power conversion circuit start to convert a first voltage into a first output voltage and a second output voltage.