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    Bidirectional power converter
    1.
    发明授权
    Bidirectional power converter 有权

    公开(公告)号：US11411507B2

    公开(公告)日：2022-08-09

    申请号：US17241073

    申请日：2021-04-27

    Applicant: KABUSHIKI KAISHA YASKAWA DENKI

    Inventor： Hirotaka Karakama ,  Hidenori Hara ,  Masashiro Tanaka ,  Mitsugu Tajima ,  Yoichi Yano

    IPC: H02M5/44 ,  H02M1/12

    Abstract: 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.

    Power convertor, controller, and method for changing carrier frequency
    2.
    发明申请
    Power convertor, controller, and method for changing carrier frequency 有权
    电源转换器，控制器和更改载波频率的方法

    公开(公告)号：US20160190970A1

    公开(公告)日：2016-06-30

    申请号：US14757846

    申请日：2015-12-24

    Applicant: KABUSHIKI KAISHA YASKAWA DENKI

    Inventor： Akira Yamazaki ,  Yoichi Yano

    IPC: H02P27/08 ,  H02P27/16

    CPC classification number: H02P27/08 ,  H02P21/0021 ,  H02P21/06 ,  H02P27/085 ,  H02P27/16 ,  H02P2205/01 ,  H02P2209/13

    Abstract: A power convertor includes a power conversion unit, a PWM controller, and a frequency changer. The power conversion unit includes a plurality of switching elements. The PWM controller is configured to perform PWM control of the plurality of switching elements. The frequency changer is configured to change a carrier frequency in the PWM control. The frequency changer includes an outputter, an integrator, and a frequency determiner. The outputter is configured to output a control value in accordance with a control deviation with respect to a control target. The integrator is configured to integrate the control value output from the outputter. The frequency determiner is configured to determine the carrier frequency based on an integral value obtained by the integrator.

    Abstract translation: 功率转换器包括功率转换单元，PWM控制器和变频器。 功率转换单元包括多个开关元件。 PWM控制器被配置为执行多个开关元件的PWM控制。 变频器配置为更改PWM控制中的载波频率。 变频器包括输出器，积分器和频率确定器。 输出器被配置为根据关于控制目标的控制偏差来输出控制值。 积分器被配置为集成从输出器输出的控制值。 频率确定器被配置为基于由积分器获得的积分值来确定载波频率。

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