Wireless Power Reception Coil With Auxiliary Load For Robot
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Solution Overview
Problem
Existing wireless power supply systems using magnetic resonance face inefficiencies in power transmission, leading to large apparatus sizes, and struggle to separate superimposed electric power and signals without causing communication errors or noise, making them unsuitable for industrial robot applications.
Innovation Solution
A wireless power supply apparatus with a power reception coil that functions as both a repeater and a direct power source to the load, eliminating the need for transformers and incorporating an auxiliary load to maintain power transfer efficiency and stability, along with a filter unit using magnetic resonance to separate specific frequency bands and reduce electromagnetic interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If electromagnetic coupling is used for power transfer between resonant coil and exciting coil, then power transfer is achieved, but transmission efficiency is low (about 50%) and apparatus size increases
Solution Approach 1:
The patent extracts and eliminates the transformer component from the power transfer system. By using direct magnetic resonance coupling between the resonant coil and power transmission coil, the system removes the intermediate electromagnetic coupling stage that required a transformer, thereby improving efficiency and reducing apparatus size.
Solution Approach 2:
The patent creates an asymmetric power transfer path where power flows directly from the power transmission coil to the resonant coil through magnetic resonance, bypassing the symmetric two-stage electromagnetic coupling process. This asymmetric direct coupling eliminates the need for bidirectional transformer coupling and improves overall system efficiency.
2Power
If both resonant coil and exciting coil are used for power conversion, then sufficient electric power is obtained, but the overall configuration size increases
Solution Approach 1:
The resonant coil in the patent serves dual functions: it acts as both the power reception coil and the load coil simultaneously. This multi-functionality eliminates the need for a separate exciting coil, reducing the number of components while maintaining sufficient power conversion capability through direct magnetic resonance coupling.
Solution Approach 2:
The patent merges the functions of the resonant coil and exciting coil into a single resonant coil component. By combining these two separate coils into one, the system achieves the same power conversion function with fewer components, thereby reducing overall configuration size while maintaining power output.
3Device complexity
If wireless transfer or superimposition of electric power and signals is used, then wiring is reduced, but communication errors and noise emission occur
Solution Approach 1:
The patent introduces a filter unit as an intermediary component between the wireless power transfer system and the signal transmission system. This filter unit selectively passes power frequency components while blocking signal frequency components, thereby preventing communication errors and noise emission while maintaining the benefits of reduced wiring.
4Object-affected harmful factors
If multiple filter units are used to separate superimposed power and signals, then signal separation is achieved, but device complexity and adjustment difficulty increase
Solution Approach 1:
The patent changes the fundamental parameter of filter design from multiple separate filter units to a single filter unit with frequency-selective characteristics. By designing the filter to respond to specific frequency ratios between power and signal components, the system achieves effective signal separation with a single filter, reducing device complexity and adjustment difficulty.
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 efficient, compact power transmission to industrial robots, ensuring steady power supply and signal transfer without noise, while reducing the size and complexity of the power supply apparatus and improving power transfer efficiency.
Implementation Method 1
a power reception coil that functions as a repeater for receiving electric power in a non-contact manner by magnetic resonance with a transmission coil
Implementation Method 2
a filter unit using magnetic resonance to separate specific frequency bands and reduce electromagnetic interference
Data Source
AI summary
A wireless power supply apparatus includes a power reception coil, an actual load and an auxiliary load. The power reception coil functions as a repeater for receiving electric power in a non-contact manner by magnetic resonance with a power transmission coil to which electric power is supplied from a power supply unit and relaying transfer of the electric power from the power transmission coil. The actual load is connected to the power reception coil and is powered by the electric power received by the power reception coil. The auxiliary load is inserted parallel to the power reception coil and the actual load and forms a closed circuit with the power reception coil when supply of the electric power to the actual load is interrupted to be in an open state.