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1. 发明授权

EP3747113B1 METHOD OF ASSESSING THE RISK OF A STATOR FAILURE 有权
公开(公告)号：EP3747113B1
公开(公告)日：2024-05-15
申请号：EP18911245.1
申请日：2018-09-20
IPC分类号： H02K11/20 , G01N23/04 , G01N7/02 , G01R31/34 , H02K15/00
CPC分类号： G01R31/343 , G01R31/346 , G01N23/04

2. 发明公开

EP4365609A1 METHOD AND APPARATUS FOR MONITORING ELECTRIC MOTOR SYSTEM 审中-公开
公开(公告)号：EP4365609A1
公开(公告)日：2024-05-08
申请号：EP22205390.2
申请日：2022-11-03
申请人： VOLVO TRUCK CORPORATION
发明人： BAGHERI, Azam , TAHERI, Atabak
IPC分类号： G01R31/34 , G01R31/42
CPC分类号： G01R31/343 , G01R31/42
摘要： A method and an apparatus are provided to monitor an electric motor drive system. Samples of a three-phase current waveform associated with the electric motor system are obtained. The samples of the three-phase current waveform are transformed into two orthogonal signals. A covariance matrix is generated from the two orthogonal signals. A fault type and/or a fault location in the electric motor system is determined based on the covariance matrix.

3. 发明公开

EP3401694A1 PROCÉDÉ D'IDENTIFICATION DE LA RÉSISTANCE ÉLECTRIQUE DU ROTOR D'UN MOTEUR ÉLECTRIQUE 有权
公开(公告)号：EP3401694A1
公开(公告)日：2018-11-14
申请号：EP18167159.5
申请日：2018-04-13
申请人： Schneider Toshiba Inverter Europe SAS
发明人： MALRAIT, François , DEVOS, Thomas , JEBAI, Al Kassem
IPC分类号： G01R31/34
CPC分类号： G01R27/14 , G01R31/34 , G01R31/343 , H02P21/14 , H02P23/0077 , H02P23/14
摘要： L'invention concerne un procédé d'identification d'une valeur de résistance ( R r ) du rotor d'un moteur électrique (M) à induction, qui comporte les étapes suivantes :
a) Détermination d'une tension de référence u s ref en fonction d'une valeur ( R̂ r ) choisie pour la résistance du rotor du moteur électrique,
b) Application d'une tension de commande ( u S ) au moteur électrique, ladite tension de commande étant déterminée à partir de ladite tension de référence u s ref ,
c) Acquisition des valeurs des courants ( i 1 , i 2 , i 3 ) mesurés dans les trois phases du moteur électrique de manière à en déduire un courant stator ( i S ) du moteur électrique,
d) Comparaison du courant stator ( i S ) obtenu avec une valeur prédéterminée i s ref ,
e) Correction de ladite valeur ( R̂ r ) utilisée pour la résistance ( R r ) du rotor et application des étapes a) à d) jusqu'à obtenir un courant stator ( i S ) égal à ladite valeur prédéterminée.

4. 发明授权

EP2658101B1 Alternator, preferably for an electric power plant, and method for monitoring the conditions of at least one sliding contact of an alternator 有权
公开(公告)号：EP2658101B1
公开(公告)日：2018-11-14
申请号：EP13165239.8
申请日：2013-04-24
申请人： Ansaldo Energia S.p.A.
发明人： D'agostino, Fabrizio , Di Liddo, Sergio , Botto, Guido , Verrecchia, Paolo
IPC分类号： H02K5/14 , H02K11/20 , H02K11/25 , G01R31/327 , G01R31/34 , G01R31/12 , H02K13/00 , H01R39/58 , H01H9/50
CPC分类号： H02K5/141 , G01R31/1218 , G01R31/3274 , G01R31/343 , H01H9/50 , H01R39/58 , H02K11/20 , H02K11/25 , H02K13/003
摘要： An alternator, preferably for an electric power plant (1) comprises a stator (5), a rotor (6), provided with a plurality of electrical windings, and a collector assembly (7), which is configured to supply current to the electrical windings of the rotor (6) and is provided with a chamber (18) and at least one sliding contact (27) housed inside the chamber (18); the alternator (3) comprises a monitoring device (8) for monitoring the conditions of at least one sliding contact (27), which is provided with at least one first temperature sensor (36); of at least one first ozone concentration sensor (37a, 37b); of at least one first photo detector (38), configured to detect the intensity and the frequency of the light events occurring inside the chamber (18); of a control device (34) configured to determine at least one operating state of at least one sliding contact (27) selected between one correct operating state and at least one first incorrect operating state on the basis of the data detected by the first temperature sensor (36), by the first ozone concentration sensor (37a, 37b) and the first photo detector (38).

5. 发明公开

EP3384300A1 PROCEDE DE DETECTION DE CHARGE OUVERTE 审中-公开
公开(公告)号：EP3384300A1
公开(公告)日：2018-10-10
申请号：EP16798629.8
申请日：2016-11-18
申请人： Continental Automotive France , Continental Automotive GmbH
发明人： BAVOIS, Thierry
IPC分类号： G01R31/34 , G01R31/02 , G01R31/42 , G01R31/28
CPC分类号： G01R31/026 , G01R31/2812 , G01R31/343 , G01R31/42
摘要： The present invention relates, in summary, to a method which makes it possible to diagnose an open load or a load actually present in a system including a resistive or inductive load controlled by a control transistor. The method according to the invention provides for measuring the intensity of the current in the branch made up of the closed control transistor and the load and then, consecutively, comparing same with a positive threshold, comparing same with a negative threshold and finally comparing the positive or negative variation thereof over a time period Δt, relative to a reference gradient in order to determine whether a load is actually present or if, conversely, there is an open-load state. The present invention is provided in particular for being used in the field of motor vehicles, in order to allow reliable diagnoses of the possible existence of an open-load state.

6. 发明授权

EP2689548B1 SYSTEM FOR DETECTING A FAILURE ASSOCIATED WITH AN INVERTER OR ASSOCIATED MACHINE 有权
公开(公告)号：EP2689548B1
公开(公告)日：2018-09-12
申请号：EP12760714.1
申请日：2012-03-07
申请人： Deere & Company
发明人： SINGH, Brij N.
IPC分类号： G01R31/42 , H02P9/02 , G01R31/34
CPC分类号： G01R31/42 , G01R31/02 , G01R31/343 , H02P29/02
摘要： An inverter comprises a first pair of semiconductor devices with switched terminals that are coupled in series between a positive terminal and a negative terminal of a direct current bus. An analog interface adjusts a voltage levels at measurement nodes associated with control terminals of the semiconductor devices. An analog-to-digital converter has analog inputs for receiving the adjusted voltage levels of the measurement nodes and outputting corresponding digital count data for each measurement node. A data processor is adapted to detect the fault or absence of a fault in the inverter based on the conformity of the digital count to one or more reference ranges stored in a data storage device for corresponding switch states of the semiconductor devices.

7. 发明授权

EP2782221B1 Verfahren zur Prüfung einer gestabten Wicklung eines Läufers einer rotierenden elektrischen Maschine 有权
公开(公告)号：EP2782221B1
公开(公告)日：2018-06-13
申请号：EP13159840.1
申请日：2013-03-19
申请人： Siemens Aktiengesellschaft
发明人： Zettner, Jürgen, Dr. , Deeg, Christian , Schuhmann, Thomas, Dr.
IPC分类号： H02K11/00 , H02K15/00 , G01R31/34 , G01K13/08 , H02K17/16
CPC分类号： G01R31/346 , G01K13/08 , G01R31/343 , H02K11/25 , H02K15/00 , H02K17/16

8. 发明授权

EP2659277B8 METHOD FOR ON-LINE DETECTION OF RESISTANCE-TO-GROUND FAULTS IN ACTIVE MAGNETIC BEARING SYSTEMS 有权
公开(公告)号：EP2659277B8
公开(公告)日：2018-05-23
申请号：EP11875261.7
申请日：2011-12-21
申请人： Dresser-Rand Company
发明人： GILARRANZ, Jose L. , GRIFFIN, Timothy R.
IPC分类号： G01R27/20 , F16C32/04 , H02K7/09 , G01R31/02 , G01M13/04 , F16C37/00 , G01R31/34
CPC分类号： H02K7/09 , F16C32/0442 , F16C37/005 , F16C2360/44 , F16C2380/26 , G01M13/04 , G01R31/025 , G01R31/343
摘要： A magnetic bearing is disclosed that includes a sensing wire wrapped around one or more of the bearing coils and configured to measure the resistance to ground of each bearing coil. With the presence of contaminants such as liquids, a protective coating disposed about the bearing coils degrades over time, thereby reducing the resistance to ground of the bearing coils. The sensing wire transmits the detected resistance to ground of the bearing coils to an adjacent sensing device, which can provide an output that informs a user whether corrective action is required to prevent damage or failure of the magnetic bearing.

9. 发明公开

EP3321706A1 METHOD AND SYSTEM FOR DETERMINING A SYNCHRONOUS MACHINE FAULT CONDITION 有权转让
标题翻译：确定同步机故障状态的方法和系统
公开(公告)号：EP3321706A1
公开(公告)日：2018-05-16
申请号：EP17195616.2
申请日：2015-09-08
申请人： ABB Schweiz AG
发明人： RODRIGUEZ, Pedro , SAHOO, Subrat , PINTO, Cajetan
IPC分类号： G01R31/34 , H02P29/02
CPC分类号： G01R31/346 , G01R31/343 , H02P9/10 , H02P29/0243
摘要： The present disclosure relates to a method of determining an electromechanical fault condition in a synchronous machine having a stator a rotor, and an exciter, wherein the exciter is a rotating exciter having an exciter stator, an exciter rotor, and exciter stator windings, wherein the rotating exciter has an AC/AC type of stator-rotor arrangement, wherein the method comprises: a) obtaining an exciter current signal which is a measurement of an exciter current flowing through the exciter stator windings of the exciter, wherein the exciter current signal is an exciter stator current, b) transforming the exciter current signal to obtain an exciter current frequency spectrum, and c) determining that a stator short-circuit fault is present in case the harmonic content of the exciter current frequency spectrum comprises a dominant frequency component at 3f s *(1-2s), where f s is the power supply frequency and s is the rotor slip of the exciter..
摘要翻译：本发明涉及一种在具有定子，转子和励磁机的同步电机中确定机电故障状态的方法，其中，励磁机是具有励磁机定子，励磁机转子和励磁机定子绕组的旋转励磁机，其中，其中该方法包括：a）获得激励器电流信号，该激励器电流信号是流过激励器的激励器定子绕组的励磁电流的测量值，其中激励器电流信号是激励器定子电流，b）变换激励器电流信号以获得激励器电流频谱，以及c）在激励器电流频谱的谐波含量包括在主频率分量处的情况下确定定子短路故障存在 3fs *（1-2s），其中fs是电源频率，s是励磁机的转子滑差。

10. 发明公开

EP3306813A1 POWER CONVERSION DEVICE 有权
标题翻译：电力转换装置
公开(公告)号：EP3306813A1
公开(公告)日：2018-04-11
申请号：EP16802838.9
申请日：2016-02-01
申请人： Hitachi Industrial Equipment Systems Co., Ltd.
发明人： KAGEYAMA Hiroshi , IBORI Satoshi , SASAKI Yasushi , TOMIYAMA Kiyotaka
IPC分类号： H02P29/024 , H02P27/06
CPC分类号： H02P27/06 , G01R31/025 , G01R31/343 , H02H7/1227 , H02P29/027 , H02P29/032
摘要： In a case where operation of a power conversion apparatus stops due to occurrence of a short circuit malfunction, a user cannot specify a point where a short circuit occurs, that is, whether or not the short circuit malfunction occurs on a cable, or whether or not the short circuit malfunction occurs within a motor. Provided is a power conversion apparatus that includes a plurality of switching elements and that drives a motor which is connected through a cable, by performing control that turns on and off the plurality of switching element, the apparatus including: an inverter circuit that is configured with a plurality of switching elements that are upper arms for controlling current for a motor and a plurality of switching element that are lower arms; and a determination unit that determines a short circuit point, in which, when an inter-phase short circuit point that occurs in the motor and the cable is inspected, the determination unit causes short circuit current to be generated by turning on the switching elements that are one upper arm and one lower arm which are in different phases, at the same time, and, based on current increasing speed when a short circuit occurs and a current decreasing speed after the short circuit occurs, determines a short circuit point.
摘要翻译：在由于发生短路故障而使电力转换设备的操作停止的情况下，用户不能指定发生短路的点，即，电缆上是否发生短路故障，或者是否不是电动机内发生短路故障。提供一种电力转换装置，其包括多个开关元件，并且通过执行控制以打开和关闭多个开关元件来驱动通过电缆连接的电机，所述装置包括：逆变器电路，其配置有多个开关元件，所述开关元件是用于控制电动机的电流的上臂和作为下臂的多个开关元件; 以及确定单元，其确定短路点，其中，当检测到发生在所述电动机和所述电缆中的相间短路点时，所述确定单元通过导通所述开关元件来产生短路电流，所述短路电流是同时处于不同相位的一个上臂和一个下臂，并且基于发生短路时的电流增加速度和发生短路后的电流下降速度来确定短路点。

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