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    • 4. 发明申请
    • FREQUENCY CONVERTER WITH DC LINK CAPACITOR AND METHOD FOR PRE-CHARGING THE DC LINK CAPACITOR
    • 具有直流链路电容器的频率转换器和用于预充电直流链路电容器的方法
    • US20140003099A1
    • 2014-01-02
    • US13930561
    • 2013-06-28
    • Siemens Aktiengesellschaft
    • Reinhold DilligHubert SchierlingThomas Schwinn
    • H02M5/458
    • H02M5/458
    • A frequency converter has an AC-DC converter and an inverter interconnected via a DC link having a first and a second circuit branch interconnected by a DC link capacitor and a commutation capacitor. To protect the AC-DC converter from damage caused by an overcurrent, the first circuit branch includes a choke in which a capacitor-side terminal is connected to a terminal of the DC link capacitor and a switch-side terminal is connected via a semiconductor switch to a DC link terminal of the AC-DC converter and also via a freewheeling diode to the second circuit branch. The semiconductor switch is configured to control a magnitude of an electric current flowing from the AC-DC converter into the DC link capacitor in accordance with a control signal.
    • 变频器具有AC-DC转换器和通过DC链路互连的逆变器,该直流链路具有由直流链路电容器和换向电容器互连的第一和第二电路支路。 为了保护AC-DC转换器免于由过电流引起的损坏,第一电路支路包括扼流圈,其中电容器侧端子连接到DC链路电容器的端子,并且开关侧端子经由半导体开关连接 到AC-DC转换器的DC链路端子,并且还经由续流二极管连接到第二电路支路。 半导体开关被配置为根据控制信号控制从AC-DC转换器流入DC链路电容器的电流的大小。
    • 6. 发明授权
    • Frequency converter with DC link capacitor and method for pre-charging the DC link capacitor
    • 具有直流母线电容器的变频器和直流母线电容器的预充电方法
    • US09318969B2
    • 2016-04-19
    • US13930561
    • 2013-06-28
    • Siemens Aktiengesellschaft
    • Reinhold DilligHubert SchierlingThomas Schwinn
    • H02J3/36H02M5/458
    • H02M5/458
    • A frequency converter has an AC-DC converter and an inverter interconnected via a DC link having a first and a second circuit branch interconnected by a DC link capacitor and a commutation capacitor. To protect the AC-DC converter from damage caused by an overcurrent, the first circuit branch includes a choke in which a capacitor-side terminal is connected to a terminal of the DC link capacitor and a switch-side terminal is connected via a semiconductor switch to a DC link terminal of the AC-DC converter and also via a freewheeling diode to the second circuit branch. The semiconductor switch is configured to control a magnitude of an electric current flowing from the AC-DC converter into the DC link capacitor in accordance with a control signal.
    • 变频器具有AC-DC转换器和通过DC链路互连的逆变器,该直流链路具有由直流链路电容器和换向电容器互连的第一和第二电路支路。 为了保护AC-DC转换器免于由过电流引起的损坏,第一电路支路包括扼流圈,其中电容器侧端子连接到DC链路电容器的端子,并且开关侧端子经由半导体开关连接 到AC-DC转换器的DC链路端子,并且还经由续流二极管连接到第二电路支路。 半导体开关被配置为根据控制信号控制从AC-DC转换器流入DC链路电容器的电流的大小。