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1. 发明授权

US11296639B2 Inverter 有权
公开(公告)号：US11296639B2
公开(公告)日：2022-04-05
申请号：US15384883
申请日：2016-12-20
申请人： LSIS CO., LTD.
发明人： Hyo-Jin Kim
IPC分类号： H02P27/06 , H02P27/04 , H02J3/38 , H02P6/14
摘要： The present invention relates to an inverter which is capable of adjusting an output frequency of a three-phase voltage output to a motor based on a result of comparison in magnitude between the minimum operating voltage of the motor and a DC link voltage applied to a DC link. The inverter includes: a measurement part configured to measure a DC link voltage applied to a DC link; a conversion part configured to convert the DC link voltage into a three-phase voltage and output the three-phase voltage to the motor; and a control part configured to make comparison in magnitude between the DC link voltage and the minimum operating voltage of the motor and adjust an output frequency of the three-phase voltage based on a result of the comparison.

2. 发明授权

US10333429B1 Method for controlling inverter 有权
公开(公告)号：US10333429B1
公开(公告)日：2019-06-25
申请号：US16210206
申请日：2018-12-05
申请人： LSIS CO., LTD.
发明人： Hyo-Jin Kim
IPC分类号： H02M7/538 , H02M7/5387 , H02H9/04
摘要： The present disclosure provides a method for controlling an inverter in an inverter system including the inverter, wherein the inverter includes a direct current-link capacitor, an inverting unit and a control unit, wherein the method comprises: when a direct current-link voltage of the direct current-link capacitor is greater than or equal to a predefined first voltage and is smaller than a second voltage which is greater than the first voltage, calculating a value using the direct current-link voltage and a time, and accumulating the calculated value over time to generate a cumulative value; when the cumulative value is greater than or equal to a predefined first value, blocking an output of the inverting unit; and when the direct current-link voltage is smaller than the first voltage, obtaining a value by subtracting a second predefined value from the cumulative value, and updating the cumulative value as the obtained value.

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