Wireless Power Receiver Switching for Impedance-Matched Machine Supply
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Solution Overview
Problem
Existing systems for supplying power to devices in machines like articulated robots are inefficient and prone to issues such as wire breakage, limited space for wiring, and impedance mismatching when using wireless power transmission.
Innovation Solution
A power-receiving device with a power-receiving antenna, rectifier, capacitors, switches, and a controller for managing power distribution, combined with a battery management system to optimize impedance matching and prevent mismatching, allowing efficient wireless power supply to devices in machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wiring is used to supply power to devices in machines, then power can be reliably transmitted, but the system becomes complex and maintenance becomes difficult
Solution Approach 1:
The patent extracts the power transmission function from the data communication wiring by introducing a separate wireless power transmission system. This allows power to be transmitted independently without relying on existing wired infrastructure, thereby reducing wiring complexity while maintaining reliable power supply to devices in machines
Solution Approach 2:
The patent replaces the mechanical wiring system with a wireless electromagnetic field-based power transmission system. By using electromagnetic waves instead of physical wire connections, the system eliminates the complexity of wiring while ensuring reliable power transmission to moving parts of machines
2Device complexity
If wireless power transmission is implemented, then wiring complexity is reduced, but impedance mismatching occurs reducing power transmission efficiency
Solution Approach 1:
The patent implements a feedback mechanism where the power receiving device measures the impedance of the power consumption device and communicates this information back to the power transmitting device. The transmitting device then adjusts its output impedance to match the receiving device's impedance, maximizing power transfer efficiency and minimizing energy loss due to impedance mismatching
Solution Approach 2:
The patent dynamically changes the impedance parameters of the power transmission system by adjusting the output impedance of the transmitting device based on real-time measurements from the receiving device. This parameter adaptation ensures optimal power transfer efficiency across varying operating conditions while maintaining wireless power transmission
3Ease of repair
If wireless power transmission is used, then maintenance needs are reduced, but power transmission efficiency is initially low due to impedance mismatching
Solution Approach 1:
The patent employs feedback control where the power receiving device continuously monitors impedance conditions and communicates this data to the transmitting device. This enables real-time optimization of power transmission efficiency through impedance matching, ensuring high efficiency operation while maintaining the wireless architecture that reduces maintenance requirements
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
Enables reliable and efficient wireless power supply to devices in machines, reducing maintenance needs and improving power transmission efficiency while minimizing wiring requirements.
Implementation Method 1
a power-receiving antenna for receiving electromagnetic waves
Implementation Method 2
a rectifier functionally connected to the power-receiving antenna, for converting the electromagnetic waves into DC voltages
Data Source
AI summary
A power-receiving device including: a power-receiving antenna for receiving electromagnetic waves; a rectifier functionally connected to the power-receiving antenna, for converting the electromagnetic waves into DC voltages; a first power storage device functionally connected to the rectifier, for storing the DC voltages therein; a second power storage device functionally connected to the first power storage device, for storing the DC voltages therein; a device functionally connected to the second power storage device; a first switch for controlling distribution of electric power between the rectifier and the first power storage device; a second switch for controlling distribution of electric power between the first power storage device and the second power storage device; a third switch for controlling distribution of electric power between the first power storage device and the device; a fourth switch for controlling distribution of electric power between the second power storage device and the device; and a controller.