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公开(公告)号：US11594989B2
公开(公告)日：2023-02-28
申请号：US17351965
申请日：2021-06-18
IPC分类号： H02P21/09
摘要： A rotary current machine system and method for controlling an electric rotary current machine, in particular an induction machine, having a rotor, a stator and at least two phase windings is disclosed. At least one electrical signal, in particular a voltage signal, is applied to at least one phase winding, preferably all phase windings, of the rotary current machine, and the current waveform in the at least one phase winding is measured. An intermodulation signal component, induced in the rotary current machine by slotting effects and magnetic saturation effects, which is determined from the current waveform measured in the at least one phase winding, is used for controlling the rotary current machine.
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公开(公告)号：US10468999B2
公开(公告)日：2019-11-05
申请号：US16022417
申请日：2018-06-28
IPC分类号： H02P5/74 , H02P6/04 , H02P25/022 , H02P29/024 , H02P25/024
摘要： Method for detecting load differences between at least one first electrical machine and at least one second electrical machine connected in parallel thereto, which are fed by an inverter, wherein the machines each are connected to the inverter via three supply lines and in two supply lines of the at least one first machine and in one of the supply lines of the at least one second machine, the currents are measured with the aid of current measuring sensors in the respective supply lines and, on the basis of the measured current values of the at least one first machine, the corresponding unmeasured currents of the at least one second machine are estimated, and the estimated total current of the supply lines of the at least one second machine is detected as a measure of deviation of the currents of the at least one second machine from the at least one first machine.
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