Contactless Power Transfer Guide Unit for Coil Alignment
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Solution Overview
Problem
Contactless power transfer systems face inefficiencies due to mismatches in magnetic flux distributions between power transmitting and receiving units, leading to reduced power transfer efficiency, especially when the types of coil units differ, and positional deviations affect transfer efficiency.
Innovation Solution
A guide unit is implemented in both power transmitting and receiving devices to adjust the position based on the type of coil units, ensuring alignment for optimal power transfer efficiency, with the guide unit determining the correct alignment for same or different types of coil units, and informing users of the parking position for vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the power receiving device is guided to the same position irrespective of coil type, then the guidance system is simple, but the power transfer efficiency deteriorates due to magnetic flux distribution mismatch
Solution Approach 1:
The guidance system dynamically adjusts the guide position based on the detected coil type. The guide unit changes the guided position according to the type of power receiving unit, allowing the system to adapt to different magnetic flux distributions while maintaining reasonable system complexity
Solution Approach 2:
The system changes the positional parameter (guide position) based on the coil type detection. By adjusting the guide position parameter according to the specific coil type, the system optimizes power transfer efficiency for each coil configuration without requiring a completely different guidance system
2Ease of operation
If the center positions of power transmitting and receiving units are aligned, then the alignment is simple, but power transfer efficiency decreases when coil types differ
Solution Approach 1:
The alignment strategy dynamically adapts based on coil type matching. When coil types are the same, center alignment is used for simplicity; when coil types differ, the system calculates and applies an optimal offset position to maximize power transfer efficiency
Solution Approach 2:
The system applies different alignment strategies to different coil type combinations. Instead of a universal alignment rule, the guide position is locally optimized for each specific pairing of transmitting and receiving coil types, ensuring optimal performance for each configuration
3Adaptability or versatility
If coil types are mismatched without position adjustment, then the system is flexible, but power transfer efficiency deteriorates
Solution Approach 1:
The system performs preliminary detection of the power receiving unit's coil type before power transfer begins. Based on this detection, the guide unit pre-calculates and sets the optimal guide position, ensuring that the transmitting and receiving units are optimally aligned before power transfer starts
Solution Approach 2:
The system uses feedback from coil type detection to adjust the guide position. The guide unit receives information about the power receiving unit type and automatically adjusts the guidance position accordingly, creating a closed-loop system that optimizes power transfer efficiency based on the specific coil configuration
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 allows for high power transmission efficiency by aligning the power transmitting and receiving units effectively, even when their types differ, and assists in parking vehicles by determining the optimal position for power reception, thereby improving overall system efficiency and user convenience.
Implementation Method 1
a power transmitting unit (220) that is configured to be able to contactlessly transmit electric power to a power receiving unit (110)
Implementation Method 2
a power receiving unit (110) that is configured to be able to contactlessly receive electric power from a power transmitting unit (220)
Data Source
AI summary
A power transmitting device includes: a power transmitting unit being able to contactlessly transmit electric power to a power receiving unit of a power receiving device; and a guide unit changing a guide position of the power receiving device at power reception of the power receiving device on the basis of a type of the power receiving unit. The guide unit may when the types of the power receiving and transmitting units are the same, set a position of the power receiving unit, at which center positions of the power receiving and transmitting units coincide with each other, for the guide position, and, when the types of the power receiving and transmitting units are different, set a position of the power receiving unit, at which the center positions of the power receiving and transmitting units deviate from each other, for the guide position.