Hybrid Wireless Charging Coil Layout for Single- and Three-Phase EV Pads
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Solution Overview
Problem
Conventional wireless power transfer systems for electric vehicles require separate chargers for single-phase and three-phase induction coils due to incompatible magnetic field distributions, necessitating separate installations and user inconvenience.
Innovation Solution
A hybrid charging coil structure that can selectively generate single-phase or three-phase magnetic field distributions using a unified primary or secondary coil structure, allowing for both operation modes based on input power phase and alignment, with a refined magnetic field distribution for improved compatibility and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate chargers are prepared for single-phase and three-phase induction coils, then compatibility with various vehicle types is improved, but device complexity and installation cost increase
Solution Approach 1:
The patent applies universality by designing a single charger capable of supporting both single-phase and three-phase induction coils. The charger includes a controller that can identify the coil type and switch between different power supply modes, making one device serve multiple functions rather than requiring separate chargers for each coil type
Solution Approach 2:
The patent applies dynamics by implementing a dynamic switching mechanism that allows the charger to adapt its power supply configuration based on the detected coil type. The system can dynamically reconfigure the power supply connections between single-phase and three-phase modes, and the coil structure itself can be dynamically adjusted or selected based on charging requirements
2Loss of energy
If separate chargers are prepared for single-phase and three-phase induction coils, then power transfer efficiency for each coil type is optimized, but installation cost and user inconvenience increase
Solution Approach 1:
The patent applies universality by designing a single charger capable of supporting both single-phase and three-phase induction coils. The charger includes a controller that can identify the coil type and switch between different power supply modes, making one device serve multiple functions rather than requiring separate chargers for each coil type
Solution Approach 2:
The patent applies parameter changes by modifying the power supply configuration parameters (phase number, voltage, current distribution) based on the detected coil type. The system changes operational parameters dynamically to optimize power transfer efficiency for each coil type while maintaining a unified charger hardware platform
3Productivity
If single-phase and three-phase induction coils have different shapes and magnetic field distributions, then each coil type achieves optimal performance for its capacity, but compatibility between coil types deteriorates
Solution Approach 1:
The patent applies dynamics by implementing a dynamic switching mechanism that allows the charger to adapt its power supply configuration based on the detected coil type. The system can dynamically reconfigure the power supply connections between single-phase and three-phase modes, and the coil structure itself can be dynamically adjusted or selected based on charging requirements
Solution Approach 2:
The patent applies parameter changes by modifying the power supply configuration parameters (phase number, voltage, current distribution) based on the detected coil type. The system changes operational parameters dynamically to optimize power transfer efficiency for each coil type while maintaining a unified charger hardware platform
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 structure reduces system installation costs, alleviates user inconvenience, and enhances power transfer efficiency by optimizing coil layout and magnetic field distribution, supporting both single-phase and three-phase operations with high compatibility.
Implementation Method 1
a primary coil (310, 320, 330) arranged to surround a first central point near an origin of a central space
Implementation Method 2
a ferrite structure facilitating the wireless power transfer and a coil wound around the ferrite structure
Implementation Method 3
a reception pad of a vehicle assembly (VA) mounted on the electric vehicle may form an inductive resonance coupling with a transmission pad of a ground assembly (GA)
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
Disclosed is a wireless power transfer pad which is prepared to transmit wireless power to a reception pad comprising a secondary coil. The wireless power transfer pad comprises three primary coils. The three primary coils are overlaid so that an outer circle, an inner circle, and a distinct region between the outer circle and the inner circle are formed.