ELECTRIC POWER CONVERSION DEVICE AND ELECTRIC POWER CONVERSION METHOD

WIPO Patent Application WO/2024/101233

A1

Provided are an electric power conversion device and an electric power conversion method in which switching loss is reduced.　This electric power conversion device comprises a main circuit, an auxiliary circuit that is positioned between the main circuit and a power supply, and an inductor that is positioned between the main circuit and the auxiliary circuit. The main circuit is provided with a main-circuit high-side switch and a main-circuit low-side switch that are connected in series, and a first capacitor and a second capacitor. The auxiliary circuit is provided with one or more diodes and one or more switches. One end of the inductor is connected to a connection point between the main-circuit high-side switch and the main-circuit low-side switch, and the other end of the inductor is connected to the auxiliary circuit. Before the main-circuit low-side switch is turned on, the electric power conversion device alternately turns on an auxiliary-circuit low-side switch that is positioned on a lower-side circuit of the auxiliary circuit and a high-side diode that is positioned on an upper-side circuit of the auxiliary circuit, thereby energizing the inductor, adjusting the amount of change in an output current, and charging the first capacitor and the second capacitor.

MAKIO DAISUKE (JP)

PCT/JP2023/039361

May 16, 2024

November 01, 2023

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IMASEN ELECTRIC IND (JP)

H02M7/48; H02M3/155

JP2016019442A	2016-02-01
JP2019103276A	2019-06-24
JP2002199736A	2002-07-12

HIROE AND ASSOCIATES, PATENT PROFESSIONAL CORPORATION (JP)

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