Wireless Charging Receiver Circuit Using Negative Impedance Conversion
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Solution Overview
Problem
Current resonant wireless charging mechanisms suffer from poor power transmission efficiency and high design complexity and manufacturing costs.
Innovation Solution
A wireless charging receiving device utilizing passive components, including a receiving coil, capacitors, clamping and rectifier diodes, and a voltage stabilizing capacitor, configured to achieve negative impedance conversion for improved efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If resonant mechanism is used for wireless power transmission, then transmission distance is extended, but power transmission efficiency deteriorates
Solution Approach 1:
The patent applies parameter changes by utilizing negative impedance conversion to transform the electrical characteristics of the receiving device. By converting the receiving device into a negative impedance device, the system achieves both extended transmission distance and improved power transmission efficiency, resolving the contradiction between distance and efficiency in resonant wireless power transmission.
2Length of stationary object
If resonant mechanism is used for wireless power transmission, then transmission distance is extended, but device complexity increases
Solution Approach 1:
The patent transforms the receiving device into a negative impedance device through parameter changes in its electrical characteristics. This approach enables extended transmission distance while simplifying the overall system design, as the negative impedance conversion can be achieved through relatively simple circuit configurations compared to traditional resonant mechanisms.
3Length of stationary object
If resonant mechanism is used for wireless power transmission, then transmission distance is extended, but manufacturing cost increases
Solution Approach 1:
The patent employs parameter changes by converting the receiving device into a negative impedance device, which can be implemented using standard electronic components and circuits. This approach achieves extended transmission distance while keeping manufacturing costs low, as the negative impedance conversion does not require expensive or complex manufacturing processes.
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
Enhances power transmission efficiency and reduces system complexity and manufacturing costs while supporting long-distance wireless charging.
Implementation Method 1
The wireless charging receiving device includes: a battery having a positive electrode; a receiving coil having a first end and a second end
Implementation Method 2
a first capacitor having a first electrode electrically connected to the first end of the receiving coil, and a second electrode; a second capacitor having a first electrode electrically connected to the second electrode of the first capacitor
Implementation Method 3
a clamping diode having a cathode electrically connected to the first electrode of the first capacitor, and an anode electrically connected to the second electrode) of the first capacitor; and a rectifier diode having an anode electrically connected to the cathode of the clamping diode
Data Source
AI summary
A wireless charging receiving device includes: a battery, a receiving coil, a first capacitor, a second capacitor, a clamping diode and a rectifier diode. A first electrode of the first capacitor is electrically connected to a first end of the receiving coil. A first electrode of the second capacitor is electrically connected to a second electrode of the first capacitor, and s second end of the receiving coil is electrically connected to a second electrode of the second capacitor. A cathode of the clamping diode is electrically connected to the first electrode of the first capacitor, and an anode of the clamping diode is electrically connected to the second electrode of the first capacitor. An anode of the rectifier diode is electrically connected to the cathode of the clamping diode.