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公开(公告)号：US11646681B2
公开(公告)日：2023-05-09
申请号：US17892432
申请日：2022-08-22
发明人： Kevin M. Jefferies , Benjamin W. Edwards , Alan E. Freeman , Richard K Weiler , Matthew L. White
IPC分类号： H02P1/26
CPC分类号： H02P1/26
摘要： Techniques for monitoring the health of a three-phase induction motor are provided. An expected threshold value is calculated as a function of an expected ratio of current unbalance to voltage unbalance for the three-phase motor. Embodiments determine whether a measured current unbalance exceeds the expected threshold value. Responsive to the measured current unbalance exceeding the expected threshold value, a remedial action may be taken, such as generating diagnostic information or activating one or more protection operations for the three-phase induction motor.
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公开(公告)号：US11333690B2
公开(公告)日：2022-05-17
申请号：US16715573
申请日：2019-12-16
IPC分类号： G01R19/25
摘要： A measurement module uses harmonic compensation factors to minimize the effects of harmonic distortion in measurements of a source current by a current sensor of the module. The module samples at a first sampling rate, measurements of the source current to generate a first current measurement. The module samples at a second sampling rate higher than the first sampling rate, for an interval of time, measurements of the source current to generate a second current measurement. The module determines a harmonic compensation factor based, at least, on a difference between the first current measurement and the second current measurement. The module determines a reported current computed as a function of at least the first current measurement, the difference between the first current measurement and the second current measurement, and the harmonic compensation factor. The reported current represents a magnitude of the source current adjusted by the harmonic compensation factor.
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公开(公告)号：US09975443B2
公开(公告)日：2018-05-22
申请号：US14898885
申请日：2013-06-24
发明人： Kevin M. Jefferies , Benjamin W. Edwards , Matthew L. White , Konstantin A. Filippenko , Richard K. Weiler
CPC分类号： B60L11/1825 , B60L11/1816 , B60L11/1818 , B60L2230/12 , H01H3/16 , H02G3/0493 , H02G11/02 , Y02T10/7005 , Y02T10/7094 , Y02T90/121 , Y02T90/128 , Y02T90/14
摘要： A cable reel assembly in an electric vehicle supply equipment (EVSE) having a reel around which a cable is coiled. A shaft supporting the reel bears discs that rotate with the reel, and calipers coupled to the discs stop them and the reel from rotating. The power L1 and L2 conductors in the cable are electrically connected to the discs, and the calipers are electrically connected to the power source for the EVSE so that the calipers provide mechanical and electrical connection when actuated. Optionally, slip rings coupled to the shaft are connected to the control pilot and proximity signal conductors in the cable. Thus, during cable re traction, the control pilot and proximity signals are still provided to the EVSE, but the power conductors are decoupled from the power source. Only when the calipers are actuated to brake the discs is current flow permitted.
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公开(公告)号：US20180090291A1
公开(公告)日：2018-03-29
申请号：US15279629
申请日：2016-09-29
发明人： Kevin M. Jefferies , Benjamin W. Edwards , Matthew L. White , Alan E. Freeman , Richard Karl Weiler
CPC分类号： H01H50/546 , H01H1/54 , H01H3/222 , H01H5/02 , H01H5/06
摘要： In an electromagnetically controlled actuator of an electrical contactor, switching is done by the actuator with a set of fixed contacts and a set of movable contacts. The movable contacts are carried on a movable contact carrier. The movable contact carrier is coupled to and driven by an armature surrounded by a coil. The armature carries a coupling shaft, and the coupling shaft carries at least part of a bistable coupling mechanism which joins the armature to the movable contact carrier and allows the movable contact carrier and armature to keep the fixed and movable contacts separated when a short circuit current creates a contact welding situation.
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公开(公告)号：US20170179854A1
公开(公告)日：2017-06-22
申请号：US14976191
申请日：2015-12-21
发明人： Alan E. Freeman , Kevin M. Jefferies , Benjamin W. Edwards , Matthew L. White , Konstantin Alexander Filippenko , Richard Karl Weiler
摘要： A load starting system in which an upstream controller determines the sequence and timing for starting a group of loads in the most efficient and timely manner. The sequence and timing is determined by one or more real-time operational characteristics, device rating characteristics, customer/user characteristics or learned/historic characteristics or by a combination of the one or more real-time, device rating, customer/user or learned/historic characteristic.
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公开(公告)号：US20170047869A1
公开(公告)日：2017-02-16
申请号：US14822675
申请日：2015-08-10
IPC分类号： H02P1/26
摘要： Method and system for protecting induction motors from stalled start conditions provide a motor overload protection device that includes a stalled start detector capable of differentiating long start from stalled start conditions. This helps the motor overload protection device identify a stalled start condition right away and trip immediately rather than allowing the motor to continue drawing locked rotor current for the duration of the startup interval. Such a motor overload protection device may be used with any suitable multiphase induction motors, including two-phase motors, three phase motors, and the like. And because only the motor phase currents are used to detect the stalled start condition, the motor overload protection device disclosed herein does not require voltage phase shift information and/or motor speed measurements, thereby simplifying overall management of the motor.
摘要翻译： 用于保护感应电机免于停止起动条件的方法和系统提供了一种电动机过载保护装置，其包括一个停止的启动检测器，能够将起动时间从停止的启动条件区分开来。 这有助于电机过载保护装置立即识别出停止的启动条件，并立即跳闸，而不是允许电机在启动间隔期间继续拉动锁定的转子电流。 这种电动机过载保护装置可以与任何合适的多相感应电动机一起使用，包括两相电动机，三相电动机等。 并且，由于仅使用电动机相电流来检测停止的起动条件，因此本文公开的电动机过载保护装置不需要电压相移信息和/或电动机速度测量，从而简化了电动机的总体管理。
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公开(公告)号：US20180166998A1
公开(公告)日：2018-06-14
申请号：US15378389
申请日：2016-12-14
摘要： A system to detect application conditions exceeding SELV design limitations and to subsequently warn or take action. A pulse detector is coupled to the switching pole of an output FET of a SELV power supply through an optocoupler and tracks when the FET is commutated off to block conduction. If a pulse occurs more than once in a given period the power supply is declared to be outside of SELV design parameters and warnings are issued or actions are taken.
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公开(公告)号：US09889760B2
公开(公告)日：2018-02-13
申请号：US15034196
申请日：2013-12-06
发明人： Kevin M. Jefferies , Benjamin W. Edwards , Matthew L. White , Konstantin A. Filippenko , Richard K. Weiler
CPC分类号： B60L11/1844 , B60L11/1809 , B60L11/184 , B60L11/185 , G06Q10/06312 , H02J7/0027 , H02J7/007 , Y02E60/721 , Y02T10/7005 , Y02T10/7055 , Y02T10/7072 , Y02T90/121 , Y02T90/128 , Y02T90/14 , Y02T90/16 , Y02T90/163 , Y02T90/169 , Y04S10/126 , Y04S30/14
摘要： A distributed energy management method and system 100 are disclosed for managing a charge rate of an array of EVSEs 140 that share a common power source. In the disclosed method and system, control of the power sharing is distributed at the individual EVSE level. For example, each EVSE includes a communication device 540 and a controller 530. The communication device is used to receive a signal relating to a present current capacity utilization of the shared circuit, such as an indication of availability or unavailability of current capacity on the shared circuit. The controller is configured to generate a variable update interval, and initiate adjustment of the charge rate of the EVSE according to the variable update interval based on the present current capacity utilization as indicated by the received signal.
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公开(公告)号：US20170184458A1
公开(公告)日：2017-06-29
申请号：US14757395
申请日：2015-12-23
发明人： Kevin M. Jefferies , Benjamin W. Edwards , Matthew L. White , Konstantin Alexander Filippenko , Richard Karl Weiler
CPC分类号： G01K7/16 , G01R1/203 , G01R11/25 , G01R15/14 , G01R15/183 , G01R19/0092 , G01R21/133 , G01R21/14 , G01R31/027 , G01R35/04
摘要： The present invention provides a method of using a current transformer for a temperature sensing device. The method determines the temperature of the current transformer's secondary winding by injecting a DC current into the secondary winding, measuring a voltage across the secondary winding, calculating the resistance of the secondary winding from the voltage induced into the secondary winding by the injected DC current and determining the secondary winding temperature by calculations or a comparison with verified resistance/temperature combinations.
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公开(公告)号：US20170180007A1
公开(公告)日：2017-06-22
申请号：US14976116
申请日：2015-12-21
发明人： Kevin M. Jefferies , Benjamin W. Edwards , Matthew L. White , Alan Freeman , Richard Karl Weiler
CPC分类号： H04B5/0031 , G06Q10/08 , G06Q50/28 , H04L41/0668
摘要： A system and method for fast device replacement (FDR), where direct replacement of an electronic and/or control device is required with minimum downtime. The electronic or control device to be replaced includes a near field communication (NFC) reader/writer and is located at a specific physical location within the equipment. The system also includes a NFC tag placed at the same specific physical location as the electronic/control device to be replaced. The NFC tag file containing a data parameter set of the electronic/control device most recently associated with the specific physical location. The direct replacement electronic/control device also having a NFC reader/writer and an algorithm for obtaining the NFC tag data parameter set and determining whether to use the data parameter set from the most recent electronic/control device associated with the specific physical location or the local data set of the new direct replacement device.
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