Power converter in resonance power transmission system, and resonance power transmission apparatus

摘要

A power converter for transmitting a resonance power is provided that includes: an input end that receives a direct current (DC) voltage of a predetermined level; a first power converter that converts the DC voltage of a predetermined level to an alternating current (AC) signal using a first switching pulse signal having substantially the same frequency as a resonant frequency; a second power converter that converts the DC voltage of a predetermined level to an AC signal using a second switching pulse signal having an opposite phase to the first switching pulse signal; a first short circuit that reduces or eliminates an odd harmonic of the AC signal outputted from the first power converter, and provides the AC signal; and a second short circuit that reduces or eliminates an odd harmonic of the AC signal outputted from the second power converter, and provides the AC signal.

主权项

1. A power converter in a resonance power transmission system, the power converter comprising:
a source resonator; an input end configured to receive a direct current (DC) voltage of a predetermined level; a first power converter configured to convert the DC voltage of a predetermined level to an alternating current (AC) signal using a first switching pulse signal having substantially the same frequency as a resonant frequency; a second power converter configured to convert the DC voltage of a predetermined level to an AC signal using a second switching pulse signal having an opposite phase to the first switching pulse signal; a first short circuit configured to reduce or eliminate an odd harmonic of only the AC signal directly outputted from the first power converter, and to provide the AC signal where the odd harmonic is reduced or eliminated to the source resonator, wherein the first short circuit comprises a first capacitor and a first inductor tuned to the source resonator, and values of the first capacitor and the first inductor are determined based on a frequency of an odd harmonic component of the AC signal outputted from the first power converter; and a second short circuit configured to reduce or eliminate an odd harmonic of only the AC signal directly outputted from the second power converter, and to provide the AC signal where the odd harmonic is reduced or eliminated to the source resonator, wherein the second short circuit comprises a second capacitor and a second inductor tuned to the source resonator, and values of the second capacitor and the second inductor are determined based on a frequency of an odd harmonic component of the AC signal outputted from the second power converter, wherein the first and second short circuits are further configured such that odd harmonic elements of the AC signal output from the first short circuit are of opposite phase to odd harmonic elements of the AC signal output from the second short circuit.