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公开(公告)号：US07285931B2
公开(公告)日：2007-10-23
申请号：US11423602
申请日：2006-06-12
申请人： Shehab Ahmed
发明人： Shehab Ahmed
CPC分类号： H02K13/006 , E21B43/128 , H02K5/12 , H02K5/132 , H02K7/11 , H02K13/003 , H02K15/0006 , H02K23/62 , H02P6/16
摘要： A commutation apparatus drives a brushless motor having a stator equipped with a plurality of coils and a rotor. The commutation apparatus comprises a rotatable commutator shaft, two or more conducting rings carried discretely about the shaft, and two or more conducting segments carried discretely about the shaft at staggered positions along or near a plane perpendicularly intersecting the shaft. Each conducting segment is electrically connected to one of the conducting rings. Two or more electrical source contacts are provided for rotatably connecting a power supply across pairs of the conducting rings. A plurality of electrical load contacts is further provided for sequentially, rotatably connecting the conducting segments to discrete coils of the brushless motor. In particular embodiments of the commutation apparatus, a magnetic coupling is employed for rotatably coupling the commutator shaft to the rotor of the brushless motor, and a pressure-bearing container is provided for rotatably supporting the commutator shaft and the coupling therein.
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公开(公告)号：US20070046225A1
公开(公告)日：2007-03-01
申请号：US11423602
申请日：2006-06-12
申请人： Shehab Ahmed
发明人： Shehab Ahmed
IPC分类号： H02P7/06
CPC分类号： H02K13/006 , E21B43/128 , H02K5/12 , H02K5/132 , H02K7/11 , H02K13/003 , H02K15/0006 , H02K23/62 , H02P6/16
摘要： A commutation apparatus drives a brushless motor having a stator equipped with a plurality of coils and a rotor. The commutation apparatus comprises a rotatable commutator shaft, two or more conducting rings carried discretely about the shaft, and two or more conducting segments carried discretely about the shaft at staggered positions along or near a plane perpendicularly intersecting the shaft. Each conducting segment is electrically connected to one of the conducting rings. Two or more electrical source contacts are provided for rotatably connecting a power supply across pairs of the conducting rings. A plurality of electrical load contacts is further provided for sequentially, rotatably connecting the conducting segments to discrete coils of the brushless motor. In particular embodiments of the commutation apparatus, a magnetic coupling is employed for rotatably coupling the commutator shaft to the rotor of the brushless motor, and a pressure-bearing container is provided for rotatably supporting the commutator shaft and the coupling therein.
摘要翻译： 换向装置驱动具有配置有多个线圈和转子的定子的无刷电动机。 换向装置包括一个可旋转的换向器轴，两个或更多个传导环离散地围绕该轴承载，以及两个或更多个传导段，其沿着或垂直于轴垂直的平面的交错位置离轴地承载轴。 每个导电段电连接到一个导电环。 提供了两个或更多个电源触点，用于可旋转地连接导电环对上的电源。 还提供了多个电负载触点，用于顺序地将导电段可转动地连接到无刷电动机的分立线圈。 在换向装置的特定实施例中，采用磁耦合来将换向器轴可旋转地连接到无刷电动机的转子上，并且设置有用于可转动地支撑换向器轴和联轴器的承压容器。
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3.发明授权公开(公告)号：US10303195B2
公开(公告)日：2019-05-28
申请号：US15521280
申请日：2015-11-06
摘要： Voltage balancing and extracted output power circuit topologies use maximum power point and maximum power point tracking to provide voltage balancing and voltage and current adjustment to optimize extracted output power for corresponding DC voltage source strings (120a, 130a). The topologies used to control power generation include one or more voltage balancing circuits and/or power system optimizer circuits (102a) to reduce decreased power utilization and enable independent operating voltages of DC voltage source strings (120a, 130a) to provide voltage balancing and to deliver a maximum power independent of the voltage and current of other DC voltage source strings (120a, 130a). The current flowing in each DC voltage source string is controlled by the duty ratio of the corresponding switch (101a, 108a). The circuit topologies can include a plurality of voltage balancing/power system optimizer circuits (102a).
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4.发明授权Apparatus and method for voltage and current balancing in generation of output power in power generation systems 有权用于发电系统输出功率的电压和电流平衡的装置和方法公开(公告)号：US09236743B2
公开(公告)日：2016-01-12
申请号：US14446277
申请日：2014-07-29
申请人： Shehab Ahmed , Ahmed Massoud , Ahmed Salah Morsy
发明人： Shehab Ahmed , Ahmed Massoud , Ahmed Salah Morsy
CPC分类号： H02J3/382 , H02J3/46 , Y10T307/691
摘要： An apparatus for voltage balancing parallel arranged direct current (DC) voltage source strings in a power generation system includes a string voltage balancing circuit having reverse blocking switches to control a current flow and an output voltage of the DC voltage source strings. Capacitors are connected to a corresponding reverse blocking switch and in series with a corresponding one of the plurality of DC voltage source strings to construct a voltage difference for a corresponding one of the plurality DC voltage source strings. The string voltage balancing circuit adjusts an output voltage of the DC voltage source strings by controlling a current flowing in the plurality of DC voltage source strings to adjust a voltage constructed across corresponding ones of the capacitors to balance the output voltage for the DC voltage source strings to be substantially the same output voltage. Current balancing using differential power processing is also provided.
摘要翻译： 用于在发电系统中并联布置的直流（DC）电压源串的电压平衡装置包括串联电压平衡电路，其具有用于控制电流和DC电压源串的输出电压的反向阻断开关。 电容器连接到相应的反向阻断开关并且与多个DC电压源串中的对应的一个串联连接，以构成多个DC电压源串中相应一个的电压差。 串电压平衡电路通过控制在多个DC电压源线中流动的电流来调节直流电压源串的输出电压，以调整跨过相应的电容器构成的电压，以平衡DC电压源串的输出电压 基本上是相同的输出电压。 还提供了使用差分功率处理的电流平衡。
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公开(公告)号：US20070046235A1
公开(公告)日：2007-03-01
申请号：US11216509
申请日：2005-08-31
申请人： Shehab Ahmed
发明人： Shehab Ahmed
IPC分类号： H02P25/12
CPC分类号： H02K13/006 , E21B43/128 , H02K5/132 , H02K7/11 , H02K13/003 , H02K23/62 , H02P6/16
摘要： A commutation apparatus drives a brushless motor having a stator equipped with a plurality of coils and a rotor. The commutation apparatus comprises a rotatable commutator shaft, two or more conducting rings carried discretely about the shaft, and two or more conducting segments carried discretely about the shaft at staggered positions along or near a plane perpendicularly intersecting the shaft. Each conducting segment is electrically connected to one of the conducting rings. Two or more electrical source contacts are provided for rotatably connecting a power supply across pairs of the conducting rings. A plurality of electrical load contacts is further provided for sequentially, rotatably connecting the conducting segments to discrete coils of the brushless motor. In particular embodiments of the commutation apparatus, a magnetic coupling is employed for rotatably coupling the commutator shaft to the rotor of the brushless motor, and a pressure-bearing container is provided for rotatably supporting the commutator shaft and the coupling therein.
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公开(公告)号：US11286727B2
公开(公告)日：2022-03-29
申请号：US16461731
申请日：2017-11-20
申请人： Shehab Ahmed , Mohamed Al-Jahwari , Sena Dorvlo , Mohamed Abdelaal , MODUS QSTP-LLC , MODUS QSTP-LLC GLOBAL PATENT TRUST
摘要： The multifunction wellbore conditioning tool (100, 200, 300) is installed in the bottom hole assembly of a drill string and performs the functions of a cutting tool, keyseat wiper, roller reamer, keyseat wiper, and stabilizer during drilling operations, precluding the need for multiple different tools in the drill string. The tool (100, 200, 300) has a working sleeve (114, 214, 314) captured concentrically on the driveshaft (102, 202, 302) between opposed spring sets (134, 136; 234, 236; 334, 336). The sleeve (114, 214, 314) remains rotationally stationary about the rotating driveshaft (102, 202, 302) when in its central or neutral position on the driveshaft (102, 202, 302). When the sleeve (114, 214, 314) shifts axially on the driveshaft (102, 202, 302) it engages a clutch mechanism that allows it to rotate with the driveshaft (102, 202, 302) so that the rotating working sleeve (114, 214, 314) conditions the borehole.
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公开(公告)号：US09654023B2
公开(公告)日：2017-05-16
申请号：US15113431
申请日：2015-01-27
IPC分类号： H02M7/155
CPC分类号： H02M7/1552 , H02H7/1257 , H02M1/32 , H02M2007/4835
摘要： The direct current (DC) side fault isolator for high voltage direct current (HVDC) converters (10) includes a first set of double thyristor switches (12) connected across the line-to-line voltage terminals between first and second phases of alternating current (AC) terminals of a HVDC converter (14), and a second set of double thyristor switches (12) connected across the line-to-line voltage between the second phase and a third phase of the AC terminals of the HVDC converter (14). In use, the first and second sets of double thyristor switches (12) separate the HVDC converter (10) from an external power grid (18) during direct current (DC) side faults by turning on these thyristors (12).
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公开(公告)号：US07285929B2
公开(公告)日：2007-10-23
申请号：US11216509
申请日：2005-08-31
申请人： Shehab Ahmed
发明人： Shehab Ahmed
IPC分类号： H02K27/00
CPC分类号： H02K13/006 , E21B43/128 , H02K5/132 , H02K7/11 , H02K13/003 , H02K23/62 , H02P6/16
摘要： A commutation apparatus drives a brushless motor having a stator equipped with a plurality of coils and a rotor. The commutation apparatus comprises a rotatable commutator shaft, two or more conducting rings carried discretely about the shaft, and two or more conducting segments carried discretely about the shaft at staggered positions along or near a plane perpendicularly intersecting the shaft. Each conducting segment is electrically connected to one of the conducting rings. Two or more electrical source contacts are provided for rotatably connecting a power supply across pairs of the conducting rings. A plurality of electrical load contacts is further provided for sequentially, rotatably connecting the conducting segments to discrete coils of the brushless motor. In particular embodiments of the commutation apparatus, a magnetic coupling is employed for rotatably coupling the commutator shaft to the rotor of the brushless motor, and a pressure-bearing container is provided for rotatably supporting the commutator shaft and the coupling therein.
摘要翻译： 换向装置驱动具有配置有多个线圈和转子的定子的无刷电动机。 换向装置包括一个可旋转的换向器轴，两个或更多个传导环离散地围绕该轴承载，以及两个或更多个传导段，其沿着或垂直于轴垂直的平面的交错位置离轴地承载轴。 每个导电段电连接到一个导电环。 提供了两个或更多个电源触点，用于可旋转地连接导电环对上的电源。 还提供了多个电负载触点，用于顺序地将导电段可转动地连接到无刷电动机的分立线圈。 在换向装置的特定实施例中，采用磁耦合来将换向器轴可旋转地连接到无刷电动机的转子上，并且设置有用于可转动地支撑换向器轴和联轴器的承压容器。
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