A method of detecting an open-phase or phase undervoltage condition of an electrical converter cell (30), characterized in that it comprises determining (410) an extreme value, e.g. A maximum value and/or a minimum value, of a phase voltage of the electrical converter cell (30) over at least one fundamental period of the phase voltage, and comparing (420) the extreme value with a first threshold value, and if based on the comparison result, determining (420) the open-phase or phase undervoltage condition of the electrical converter cell (30). A phase loss or phase undervoltage condition is determined (430) if a first threshold criterion related to the first threshold is satisfied.
一种检测电转换器单元(30)缺相或相位欠压状况的方法,其特征在于,该方法包括:确定(410)电转换器单元(30)的相位电压在相位电压的至少一个基本周期内的极值,例如最大值和/或最小值,并将该极值与第一阈值进行比较(420),并且,如果基于该比较结果,与第一阈值相关的第一阈值标准被满足,则确定(430)缺相或相位欠压状况。
Method, control unit and system for detecting phase loss or undervoltage of electrical converter unit
检测电转换器单元缺相或欠压的方法、控制单元及系统
2022-05-13
Patent
Electronic Resource
Chinese
IPC: | B66B Aufzüge , ELEVATORS |
European Patent Office | 2023
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