Non-contact power transmission device and design method thereof

Abstract

A non-contact power transmission device is disclosed. The resonant system includes a primary coil connected to the AC power source, a primary resonance coil, a secondary resonance coil, and a secondary coil is connected to the load. When the relationship between an input impedance of the resonant system and a frequency of an AC voltage of the AC power source is shown in a graph, the frequency of the AC voltage of the AC power source is set between a first frequency at which the input impedance has a local maximum value, and a second frequency that is greater than the first frequency and at which the input impedance has a local minimum value.

Description

technical field [0001] The present invention relates to a non-contact power transmission device and a design method thereof. Background technique [0002] Figure 6 An overview of a non-contact power transmission device that transmits power from a first copper wire coil 51 to a second copper wire coil 52 that is separated from the first copper wire coil 51 is shown using electromagnetic field resonance. Such a device is disclosed in Non-Patent Document 1 and Patent Document 1, for example. exist Figure 6 Among them, the magnetic field generated by the primary coil 54 connected to the AC power supply 53 is enhanced by the magnetic field resonance generated by the first and second copper wire coils 51 and 52, and the electric field of the magnetic field enhanced near the second copper wire coil 52 The magnetic induction action supplies the electric power generated in the secondary coil 55 to the load 56 . It was confirmed that when the first and second copper wire coils 51 ...

AI Technical Summary

Problems solved by technology

[0005] However, the first copper wire coil 51 on the transmitting side (power supply side) and the second coil 51 on the receiving side (power receiving side) necessary for designing and manufacturing the non-contact power transmission device are not clearly described in Non-Patent Document 1. Relation between the resonance frequency of the copper wire coil 52 and the frequency of the output voltage of the AC power supply 53

In particular, there is no disclosure of a method of determining the frequency of the output voltage of the AC power supply 53 for efficiently transmitting power

Therefore, in order to determine the most suitable frequency of the output voltage of the AC power supply 53, it is necessary to study the relationship between the frequency of the output voltage of the AC power supply 53 and the power transmission efficiency in a wide range, which is labor-intensive.

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