公开(公告)号：US20210336549A1

公开(公告)日：2021-10-28

申请号：US17241073

申请日：2021-04-27

申请人： KABUSHIKI KAISHA YASKAWA DENKI

发明人： Hirotaka KARAKAMA ,  Hidenori HARA ,  Masashiro TANAKA ,  Mitsugu TAJIMA ,  Yoichi YANO

IPC分类号： H02M5/44 ,  H02M1/12

摘要： A power conversion apparatus includes: matrix converter circuitry to perform power conversion between a primary side electric power and a secondary side electric power; rectifier circuitry to convert the primary side electric power to charge a capacitor; and control circuitry to: set a changeover reference voltage at a first reference voltage when the primary side voltage magnitude is a first voltage magnitude and set the changeover reference voltage at a second reference voltage when the primary side voltage magnitude is a second voltage magnitude; and select, based on the changeover reference voltage and the terminal voltage, a connection state from: a first connection state in which the rectifier circuitry is connected to the capacitor by a first route including a current limit device; and a second connection state in which the rectifier circuitry is connected to the capacitor by a second route that bypasses the current limit device.