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公开(公告)号：US10992129B2
公开(公告)日：2021-04-27
申请号：US15754783
申请日：2016-08-22
发明人： Lihua Hu , Teng Long , Martin Samuel Butcher , Allan David Crane
摘要： A power distribution system includes power converter systems electrically connected to a distribution bus which defines a point of common coupling. Each power converter system includes a power converter with semiconductor switching devices controlled using a pulse width modulation strategy with a switching frequency. A controller for each power converter system applies a spectrum analysis process to the respective power converter system that uses measured or derived zero sequence currents associated with the respective power converter system to determine the location of a ground fault within the power distribution system. Each controller applies a switching frequency process where the switching frequency of the power converter of at least one of the power converter systems is different from the switching frequency of the power converter of at least another one of the power converter systems during at least part of the time that the spectrum analysis process is applied.
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公开(公告)号：US20190140527A1
公开(公告)日：2019-05-09
申请号：US16184348
申请日：2018-11-08
摘要： The invention relates to a power system that includes an electrical machine, (e.g., a motor or generator). The electrical machine has a stator with a stator winding connected to a power converter. The power system includes an assembly to reduce, and optionally eliminate, common mode currents between the electrical machine and the power converter. The assembly includes a stator frame connected to ground potential and an electrical insulator (e.g., a plurality of stator mounts) located between the stator frame and the stator.
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公开(公告)号：US11437895B2
公开(公告)日：2022-09-06
申请号：US16184348
申请日：2018-11-08
IPC分类号： H02K11/40 , H02K11/02 , H02K1/18 , H02P29/024 , H02K11/01 , H02K11/33 , H02K5/22 , H02K5/24 , H03H7/06
摘要： The invention relates to a power system that includes an electrical machine, (e.g., a motor or generator). The electrical machine has a stator with a stator winding connected to a power converter. The power system includes an assembly to reduce, and optionally eliminate, common mode currents between the electrical machine and the power converter. The assembly includes a stator frame connected to ground potential and an electrical insulator (e.g., a plurality of stator mounts) located between the stator frame and the stator.
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