公开(公告)号：US20160356854A1

公开(公告)日：2016-12-08

申请号：US15157644

申请日：2016-05-18

Applicant: ABB Technology Ltd

Inventor： Luca Peretti ,  Mehanathan Pathmanathan ,  Omer Ikram Ul Haq ,  Subrat Sahoo

IPC: G01R31/34

CPC classification number: G01R31/34 ,  G01M5/0066 ,  G01M13/028 ,  G01M13/045

Abstract: A method for determining an undesired condition in an electrical drive system including an electrical machine and an electrical drive, wherein the method includes a) obtaining a measured signal of an electrical or mechanical parameter, b) obtaining a frequency spectrum of the measured signal, that contains a measured frequency component, c) determining whether the measured frequency component is within a predetermined distance from a trend line, which trend line is associated with only one specific frequency component of the electrical or mechanical parameter present during a specific undesired condition, d) on the condition that the measured frequency component is within the predetermined distance from the trend line increasing a counter associated with the trend line, e) repeating steps a) to d), wherein in case the counter reaches a predetermined number determining that the electrical drive system is subjected to the undesired condition associated with the trend line.

Abstract translation: 一种用于确定包括电机和电驱动器的电驱动系统中的不期望状况的方法，其中所述方法包括：a）获得电或机械参数的测量信号，b）获得测量信号的频谱， 包含测量的频率分量，c）确定测量的频率分量是否在距趋势线的预定距离内，哪个趋势线仅与在特定不需要的状况期间存在的电或机械参数的一个特定频率分量相关联，d） 在所述测量的频率分量在与所述趋势线增加与所述趋势线相关联的计数器的预定距离内的条件下，e）重复步骤a）至d），其中在所述计数器达到预定数量的情况下，确定所述电驱动 系统遭受与趋势线相关联的不期望的状况。

公开(公告)号：US20160233807A1

公开(公告)日：2016-08-11

申请号：US15015789

申请日：2016-02-04

Applicant: ABB Technology Ltd

Inventor： Tobias Rogg ,  Luca Peretti

IPC: H02P21/14 ,  H02P21/22 ,  H02P21/00

CPC classification number: H02P21/14 ,  H02P6/186 ,  H02P21/0003 ,  H02P21/22 ,  H02P21/32 ,  H02P23/0031

Abstract: A self-commissioning method for estimating differential inductances in an electric machine, such as e.g. a synchronous reluctance machine or interior permanent magnet machine, with cross-magnetization effects is provided. The electric machine is driven with PWM voltages to explore current plurality of operating points of the currents in the electric machine while keeping the electric machine at standstill or quasi-standstill. At each operating point PWM switching voltage transients are used as a small-signal excitation. Currents of the electric machine are measured by means of oversampling, which permit the reconstruction of the waveforms including the current ripple within a PWM period caused by the PWM switching transients. Finally, the differential inductances at each operating point are determined based on the determined direct and quadrature current waveforms and voltages.

Abstract translation: 一种用于估计电机中的差分电感的自调试方法，例如， 提供了具有交叉磁化效应的同步磁阻电机或内部永磁机。 电机用PWM电压驱动，以探索电机中电流的多个工作点，同时保持电机处于静止状态或准停机状态。 在每个工作点，PWM开关电压瞬变被用作小信号激励。 通过过采样来测量电机的电流，这允许重建由PWM切换瞬变引起的PWM周期内的电流纹波。 最后，根据确定的直流和正交电流波形和电压确定每个工作点的差分电感。