Non-contact power supply facility, impedance adjustment method for non-contact power supply facility, and impedance adjustment program for non-contact power supply facility
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Solution Overview
Problem
In non-contact power supply facilities with multiple feeder circuits, adjusting feeder circuit impedance is challenging due to the interference from adjacent feeder circuits, leading to potential degradation in adjustment accuracy and increased man-hours for installation and operation.
Innovation Solution
A system that includes a power supply facility with a power supply device, a power supply controller, and an adjustment unit, which measures voltage values before and during alternating current output to calculate feeder circuit reactance and adjust circuit characteristics, such as inductance or capacitance, to achieve a predetermined impedance, while considering the effects of adjacent feeder circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If feeder circuit impedance is adjusted in a non-contact power supply facility with multiple feeder circuits, then the impedance adjustment can be performed, but the adjustment accuracy is degraded due to interference from adjacent feeder circuits
Solution Approach 1:
The patent extracts and eliminates the harmful interference from adjacent feeder circuits by introducing a grounding switch that connects adjacent feeder circuits to ground during the impedance adjustment process. This isolates the target feeder circuit from interference, enabling accurate impedance measurement and adjustment without the detrimental effects of neighboring circuits.
Solution Approach 2:
The grounding switch acts as an intermediary mechanism that temporarily connects adjacent feeder circuits to ground potential during adjustment operations. This intermediary action blocks the interference pathways between adjacent circuits while allowing the target circuit to be adjusted independently, thereby resolving the contradiction between multi-circuit operation and adjustment accuracy.
2Ease of manufacture
If traditional impedance adjustment methods are used in multi-feeder facilities, then the adjustment process can be completed, but the man-hours for installation and operation increase
Solution Approach 1:
The patent implements a self-service adjustment mechanism where the system automatically performs impedance measurements and calculations using the voltage difference method. The control unit autonomously determines the impedance values and controls the adjustment unit to modify capacitor connections, eliminating the need for manual measurement and calculation processes while reducing installation and operation time.
Solution Approach 2:
The patent changes the measurement parameter from traditional current-based impedance measurement to voltage difference-based measurement. By measuring voltages at different switching states and calculating impedance from voltage differences, the system achieves faster, more accurate adjustments without complex manual procedures, thereby reducing man-hours while improving ease of manufacture.
Data Source
AI summary
An adjustment system causes a target power supply device to execute first processing and second processing while causing at least one adjacent power supply device to perform a regular power supply operation. The first processing is processing for measuring a first voltage value while a power supply circuit of the target power supply device does not output an alternating current. The second processing is processing for measuring a second voltage value while the power supply circuit of the target power supply device outputs an alternating current. The adjustment system obtains a feeder circuit reactance of a feeder circuit based on the difference between the first voltage value and the second value, and executes adjustment processing for adjusting circuit characteristics with use of an adjustment unit in accordance with the obtained feeder circuit reactance in such a manner that the feeder circuit impedance is a predetermined impedance.