Wireless Power Rectification Circuit with Forward and Reverse Transistors
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Solution Overview
Problem
Existing wireless power transmission systems face instability and potential damage due to varying power input levels, particularly when the distance between the transmission and reception devices is large, leading to inefficient rectification and risk of transistor damage in the rectification circuit.
Innovation Solution
An electronic device with a wide input power range rectification circuit, comprising forward and reverse rectification circuits with multiple transistors, distributes large power inputs across multiple transistors to prevent voltage exceeding designated limits, ensuring stable rectification and protecting components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single rectification circuit is used to receive wireless power, then the device structure is simple, but the rectification becomes unstable when power input varies with distance
Solution Approach 1:
The rectification circuit is divided into multiple independent rectification circuits (first rectification circuit, second rectification circuit, etc.), each capable of independently rectifying received power. This segmentation allows the system to select appropriate rectification circuits based on received power levels, improving rectification stability while managing complexity through modular design.
2Length of moving object
If the distance between transmission and reception devices is large, then remote power transmission is enabled, but the received power becomes too small for stable rectification
Solution Approach 1:
The system dynamically selects which rectification circuit to use based on the received power level, which varies with transmission distance. When distance is large and power is small, a rectification circuit optimized for low power is selected. When distance is small and power is large, another rectification circuit is selected. This dynamic adaptation ensures stable rectification across varying distances.
3Productivity
If the distance between transmission and reception devices is short, then power transmission efficiency is high, but the received power becomes too large and may damage rectification circuit components
Solution Approach 1:
The system dynamically switches between different rectification circuits based on received power levels. When transmission distance is short and power is large, a rectification circuit with higher power handling capability is selected, preventing transistor damage. When power is small, a different circuit is used. This dynamic selection resolves the contradiction between efficiency and safety.
Solution Approach 2:
The system prepares multiple rectification circuits with different power handling capabilities in advance. Before power damage can occur, the control circuit selects the appropriate circuit based on expected or measured power levels, providing a buffer against excessive power damage to transistors and other components.
4Reliability
If multiple rectification circuits are used to handle varying power levels, then rectification stability improves, but the device complexity increases
Solution Approach 1:
Multiple rectification circuits are designed with overlapping functionality, where each circuit can handle a range of power levels. The control circuit universally manages all circuits, selecting the most appropriate one based on current conditions. This multi-functionality approach improves reliability while controlling complexity through standardized design and intelligent control.
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 enables stable rectification even with large power inputs, preventing transistor damage and maintaining efficient power conversion across varying distances, thus ensuring reliable operation of wireless power transmission systems.
Implementation Method 1
a first reception circuit configured to receive a first alternating current power via an electromagnetic wave
Implementation Method 2
a rectification circuit configured to rectify the alternating current power received via the reception circuit
Data Source
AI summary
An electronic device according to various embodiments of the present invention comprises: a receiving circuit for outputting an AC power received wirelessly; and a rectifier circuit for rectifying the AC power being output from the power receiving circuit. The rectifier circuit comprises a forward rectifier circuit and a reverse rectifier circuit. A first terminal of the forward rectifier circuit is connected to the receiving circuit and the reverse rectifier circuit, a second terminal of the forward rectifier circuit is connected to an output terminal, and the forward rectifier circuit comprises first transistors for rectifying the AC power during a first period. A first terminal of the reverse rectifier circuit is connected to the receiving circuit and the forward rectifier circuit, a second terminal of the reverse rectifier circuit is connected to a ground, and the reverse rectifier circuit can comprise second transistors for preventing the AC power from being transmitted to the forward rectifier circuit during a second period.