Magnetic Core Inductor for Contactless Power Pad
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Solution Overview
Problem
Contactless power supply systems that rely on transformers face efficiency issues when large inductance is required, leading to downsizing challenges and reduced transformer efficiency.
Innovation Solution
A contactless power supply system utilizing power supply pads with a magnetic core and an inductor coil where the inductor coil uses the power supply core as a magnetic path, allowing for reduced size and efficient magnetic flux management without a transformer, with the inductor coil configured to minimize magnetic flux interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate inductor coil with core is provided for the filter circuit, then the filter circuit characteristics are ensured, but the system size increases
Solution Approach 1:
The patent combines the inductor coil for the filter circuit with the power supply core by providing the inductor coil to the power supply core and using the power supply core as a magnetic path. This merging eliminates the need for a separate inductor coil with core, thereby reducing system size while ensuring filter circuit characteristics are maintained.
2Reliability
If leakage inductance of the transformer is increased to provide necessary inductance for the filter circuit, then the filter circuit requirements are met, but the transformer efficiency is lowered
Solution Approach 1:
The patent extracts the inductance function from the transformer by providing a separate inductor coil for the filter circuit that uses the power supply core as its magnetic path. This allows the transformer to operate at optimal efficiency while the filter circuit receives the necessary inductance from the separately provided inductor coil.
3Reliability
If the inductor coil is provided separately from the power supply core, then the filter circuit can be configured, but the device complexity increases
Solution Approach 1:
The patent merges the inductor coil with the power supply core structure by providing the inductor coil to the power supply core and utilizing the power supply core as the magnetic path. This integration reduces the number of separate components while maintaining the filter circuit's functional 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
Enables efficient power transmission with reduced size compared to systems requiring separate inductor coils, maintaining filter circuit characteristics and avoiding transformer efficiency losses.
Implementation Method 1
a power supply coil provided to the power supply core, the power supply coil using the power supply core as a magnetic path
Implementation Method 2
the inductor coil of at least any one of the filter circuits is provided to the power supply core of the power supply pad to which the filter circuit is connected, and the inductor coil uses the power supply core as a magnetic path
Implementation Method 3
electric power is transmitted from one power supply pad to the other power supply pad in a contactless manner
Data Source
AI summary
A contactless power supply system includes: a power supply pad including a power supply core formed of a magnetic material, and a power supply coil that uses the power supply core as a magnetic path; and a filter circuit including an inductor coil, the filter circuit being connected to the power supply pad. The power supply pads to which the respective filter circuits are connected are brought into a face-to-face relation so that electric power is transmitted from one power supply pad to the other power supply pad in a contactless manner. An inductor coil of at least either one of the filter circuits is provided to the power supply core of the power supply pad to which the filter circuit is connected, and the inductor coil uses the power supply core as a magnetic path.