Inductive Energy Transfer Circuit with Adaptive Damping Control
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Solution Overview
Problem
Existing inductive energy transfer systems for small electrical appliances face inefficiencies in power consumption, particularly in standby modes, due to weak coupling between the primary and secondary sides of the transformer, making it difficult to adjust power consumption based on the appliance's energy demand.
Innovation Solution
A circuit arrangement with a controllable damping element, comprising a resistor and a switch, is used to reduce nonreactive power consumption by varying the oscillator's amplitude in standby mode, and a device detects the inductive load to adjust the damping element accordingly, ensuring instantaneous power adaptation based on the appliance's power demand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the oscillator is operated with stabilized voltage or constant amplitude to ensure reliable energy transfer, then the reliability of energy transfer is improved, but the power consumption cannot be adjusted in standby modes leading to energy waste
Solution Approach 1:
The patent applies dynamics by making the oscillator's operating state adjustable between different modes (standby with reduced amplitude and full operation with constant amplitude). The damping element can be modified to change the oscillator's behavior, allowing the system to adapt its power consumption based on whether an appliance is present and what its power demand is, while maintaining reliable energy transfer when needed.
2Stability of the object's composition
If the coupling between primary and secondary sides is kept weak to reduce interference, then the stability of the system is improved, but the power consumption of the charging station is only weakly affected by the appliance's power consumption making control difficult
Solution Approach 1:
The patent implements feedback by detecting the inductive load of the oscillator and using this information to control the damping element. The detection device monitors the oscillator's behavior and provides feedback signals that cause the damping element to modify the oscillator's operation accordingly. This closed-loop control enables the system to adapt its power consumption to match the appliance's actual power demand while maintaining system stability through the weak coupling design.
3Adaptability or versatility
If three operating states are implemented to match different appliance power demands, then the adaptability of the charging station is improved, but the device complexity increases due to multiple control states
Solution Approach 1:
The patent applies self-service by enabling the oscillator to automatically transition between operating states based on the detected inductive load. The detection device monitors the oscillator's behavior and automatically adjusts the damping element to modify the oscillator's operation. This self-regulating mechanism allows the system to autonomously manage the three operating states (standby with reduced amplitude, simple standby, and extended standby) without requiring complex external control circuitry or manual intervention.
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 solution effectively reduces power consumption in standby modes while maintaining the ability to detect increased power demands, allowing for efficient energy transfer and optimized operation across multiple states.
Implementation Method 1
an alternating magnetic field is generated in the charging station by an oscillator that has a coil element and a capacitor element, wherein the coil element simultaneously forms the primarily coil of an inductive transformer
Data Source
AI summary
A method and a circuit arrangement for the inductive transfer of energy with an oscillator and a device to detect the inductive load of the oscillator, and to modify a damping element in the oscillator depending on the load of said oscillator.