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公开(公告)号：US20100039075A1
公开(公告)日：2010-02-18
申请号：US12458723
申请日：2009-07-21
IPC分类号： H02P9/02
CPC分类号： H02P9/04 , H02P2101/30
摘要： Utilisation of a number of electrical machines such as generators all driven by a common prime mover, such as a gas turbine engine, are known. However, faults in one phase of one particular electrical machine may cause torque vibration and therefore stressing to mechanical linkages between the electrical machine and the prime mover. By determining torque vibration and then utilising a second electrical machine to introduce an anti-phase torque vibration a substantially balanced and steady torque loading to the mechanical linkages can be achieved.
摘要翻译： 已知利用诸如燃气轮机之类的共同原动机驱动的发电机的电机如发电机。 然而，一个特定电机的一相中的故障可能导致扭矩振动，并因此引起电机和原动机之间的机械连接。 通过确定扭矩振动，然后利用第二电机引入反相扭矩振动，可以实现基本上平衡和稳定的扭矩负载到机械连杆。
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公开(公告)号：US20100039076A1
公开(公告)日：2010-02-18
申请号：US12458733
申请日：2009-07-21
IPC分类号： H02P9/10
CPC分类号： H02P9/102 , H02P9/105 , H02P9/48 , H02P2101/30
摘要： Electromechanical arrangements are utilised widely whereby a prime mover in the form of a mechanical assembly such as a gas turbine engine is utilised to drive an electrical machine as an electrical generator. Unfortunately the loads applied to the electrical generator may vary creating oscillation across phases of the electrical generator. Such oscillations generally will be translated to the mechanical assembly in the form of torque oscillations which may cause stressing. Stressing of the mechanical assembly will reduce its life and may alter its performance as well as fuel consumption. By provision of appropriate mechanisms for balancing electrical loads across an electrical machine as well reducing the time decay period for stored charge within an electrical assembly associated with an electrical machine it is possible to reduce torque oscillations as presented to the mechanical assembly and therefore improve its operational performance.
摘要翻译： 机电结构被广泛使用，由此利用诸如燃气涡轮发动机的机械组件形式的原动机来驱动电机作为发电机。 不幸的是，施加到发电机的负载可能变化，从而在发电机的相位上产生振荡。 这种振荡通常将以转矩振荡的形式转化为机械组件，这可能引起应力。 强调机械装配将减少其寿命，并可能改变其性能以及燃料消耗。 通过提供用于平衡跨越电机的电负载平衡的适当机构，以及减少与电机相关联的电气组件内存储的电荷的时间衰减周期，可以减少呈现给机械组件的扭矩振荡，从而改善其操作 性能。
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公开(公告)号：US20110080000A1
公开(公告)日：2011-04-07
申请号：US12995527
申请日：2009-05-12
CPC分类号： H02P25/22 , H02K3/28 , H02K11/048 , H02K21/16 , H02K29/03 , H02P9/105 , H02P9/30 , H02P2101/30
摘要： A synchronous electrical machine comprises a plurality of phases and detecting means arranged to detect an open-circuit fault in at least one of the phases of the synchronous electrical machine. Isolating means is arranged to isolate the at least one phase of the synchronous electrical machine with the fault. Phase shift means are arranged to produce a controlled phase shift between the voltage and the current within the remaining phases of the synchronous electrical machine so as to adjust the phase angle of the second harmonic powers produced by the remaining phases of the synchronous electrical machine such that the vector sum of the second harmonic power vectors of the remaining phases of the synchronous electrical machine is zero to eliminate torque ripple. The phase shift means is arranged to adjust the phase angle of all the remaining phases by the same predetermined angle to maximise the torque ripple-free power output of the synchronous electrical machine.
摘要翻译： 同步电机包括多个相位和检测装置，其布置成检测同步电机的至少一个相位中的开路故障。 隔离装置被布置成与故障隔离同步电机的至少一个相。 相移装置被布置成在同步电机的剩余相中的电压和电流之间产生受控的相移，以便调整由同步电机的剩余相产生的二次谐波功率的相位角，使得 同步电机的剩余相位的二次谐波功率矢量的向量和为零，以消除转矩脉动。 相移装置被布置成将所有剩余相的相位角调整相同的预定角度，以最大化同步电机的无转矩脉动功率输出。
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公开(公告)号：US08653797B2
公开(公告)日：2014-02-18
申请号：US12995527
申请日：2009-05-12
IPC分类号： H02P3/18
CPC分类号： H02P25/22 , H02K3/28 , H02K11/048 , H02K21/16 , H02K29/03 , H02P9/105 , H02P9/30 , H02P2101/30
摘要： A synchronous electrical machine comprises a plurality of phases and detecting means arranged to detect an open-circuit fault in at least one of the phases of the synchronous electrical machine. Isolating means is arranged to isolate the at least one phase of the synchronous electrical machine with the fault. Phase shift means are arranged to produce a controlled phase shift between the voltage and the current within the remaining phases of the synchronous electrical machine so as to adjust the phase angle of the second harmonic powers produced by the remaining phases of the synchronous electrical machine such that the vector sum of the second harmonic power vectors of the remaining phases of the synchronous electrical machine is zero to eliminate torque ripple. The phase shift means is arranged to adjust the phase angle of all the remaining phases by the same predetermined angle to maximize the torque ripple-free power output of the synchronous electrical machine.
摘要翻译： 同步电机包括多个相位和检测装置，其布置成检测同步电机的至少一个相位中的开路故障。 隔离装置被布置成与故障隔离同步电机的至少一个相。 相移装置被布置成在同步电机的剩余相中的电压和电流之间产生受控的相移，以便调整由同步电机的剩余相产生的二次谐波功率的相位角，使得 同步电机的剩余相位的二次谐波功率矢量的向量和为零，以消除转矩脉动。 相移装置被布置成将所有剩余相的相位角调整相同的预定角度，以最大化同步电机的无转矩脉动功率输出。
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公开(公告)号：US20100033141A1
公开(公告)日：2010-02-11
申请号：US12382392
申请日：2009-03-16
申请人： Lihua Hu , David R. Trainer , Stephen A. Long
发明人： Lihua Hu , David R. Trainer , Stephen A. Long
IPC分类号： H02P9/10
CPC分类号： H02P9/102 , H02P2101/30
摘要： Within generator systems maintenance of stability in terms of voltage is desirable. Generally, several generators will be arranged in parallel within the generator system with one generator voltage controlled to provide dynamic responsiveness to load switching. With regard to some loads which are generally of an active nature, the capacity of a first generator, which is voltage controlled, may be insufficient to adequately avoid transient voltage instability. By providing an actuator signal from a load to act as a pre-emptive or forward feed to an electrical current controlled generator, that second electrical current generator can be arranged to provide additional or reduced electrical current to avoid system voltage instability.
摘要翻译： 在发电机系统中，期望维持稳定的电压。 通常，几个发电机将在发电机系统内并联布置，一个发电机电压被控制以提供对负载切换的动态响应。 对于通常具有活性的一些负载，第一发电机的电压控制的容量可能不足以充分地避免瞬态电压的不稳定性。 通过提供来自负载的致动器信号作为对电流控制的发电机的先发或正向馈送，该第二电流发生器可被布置成提供附加或减小的电流以避免系统电压不稳定性。
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公开(公告)号：US20100045221A1
公开(公告)日：2010-02-25
申请号：US12379937
申请日：2009-03-04
申请人： David R. Trainer , Harsh Agarwal , Stephen M. Husband , Gareth E. Moore , David J. Powell , Stephen A. Long
发明人： David R. Trainer , Harsh Agarwal , Stephen M. Husband , Gareth E. Moore , David J. Powell , Stephen A. Long
CPC分类号： H02P25/08 , H02P6/14 , H02P6/15 , H02P6/28 , H02P25/089
摘要： Electrical machine arrangements have advantages with regard to providing local electrical power and starting. Embedding such electrical machine arrangements in machinery such as gas turbine engines is advantageous in removing mechanical linkages and reducing aerodynamic drag. However, the components utilised must be able to withstand harsh environmental conditions and therefore the DC link capacitor used for smoothing of voltage fluctuations are limited to relatively low capacitance densities. Low density DC link capacitors require large sizes which render electrical machines less acceptable for embedded usage. By providing offset of electrical current in inductance elements such as stator windings and stator coils of electrical machines in dead periods of the cycle a reduction in DC link capacitor requirements is achieved reducing the size, weight and complexity of installing electrical machines in gas turbine engines.
摘要翻译： 电机装置在提供局部电力和启动方面具有优势。 在诸如燃气涡轮发动机的机械中嵌入这样的电机装置有利于去除机械连杆并减小空气动力学阻力。 然而，所使用的部件必须能够承受恶劣的环境条件，因此用于平滑电压波动的DC链路电容器被限制在相对低的电容密度。 低密度直流链路电容器需要较大的尺寸，这使得电机不适合嵌入式使用。 通过在循环的死区中提供诸如电机的定子绕组和定子线圈的电感元件中的电流偏移，可以减少DC链路电容器的要求，从而降低了在燃气涡轮发动机中安装电机的尺寸，重量和复杂性。
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公开(公告)号：US20100038969A1
公开(公告)日：2010-02-18
申请号：US12382391
申请日：2009-03-16
申请人： Lihua Hu , David R. Trainer , Stephen A. Long
发明人： Lihua Hu , David R. Trainer , Stephen A. Long
CPC分类号： H02P9/102 , H02P2101/30 , Y10T307/505 , Y10T307/718
摘要： Electrical power generation systems typically comprise an electrical power distribution arrangement in which a number of electrical power generators are coupled in parallel. In such circumstances in order to avoid conflict generally a first electrical power generator is controlled with a voltage controller whilst second electrical power generators have electrical current controllers. As loads are switched into and out of the electrical distribution system in normal operation the first electrical power generator and its voltage controller can accommodate voltage dynamics and therefore maintain a desired voltage. However, in order to accommodate heavier loads switching, the dynamic operation of the electrical current controller is achieved through utilising operational voltage margins from a desired voltage as control signals to the electrical current controller. A threshold is provided above which the electrical voltage margin must operate and regimes are provided to determine continued increase or fall in the operational voltage to allow continued dynamic control of the electrical current in order that voltage stability can be re-established with regard to electrical power distribution arrangements.
摘要翻译： 电力发电系统通常包括电力分配装置，其中多个发电机并联耦合。 在这种情况下，为了避免冲突，第一发电机通过电压控制器控制，而第二发电机具有电流控制器。 当负载在正常操作中被切换进出配电系统时，第一电力发电机及其电压控制器可以适应电压动态并因此保持期望的电压。 然而，为了适应较重的负载切换，电流控制器的动态操作通过利用来自期望电压的操作电压余量作为对电流控制器的控制信号来实现。 提供了一个阈值，在该阈值之上，电压裕度必须运行并且提供方案以确定工作电压的持续增加或降低，以允许电流的持续动态控制，以便可以关于电功率重新建立电压稳定性 分销安排。
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8.发明申请Earthing arrangement for a DC electrical system and a method of operating an earthing arrangement for a DC electrical system 有权用于直流电系统的接地装置和用于DC电气系统的接地装置的操作方法公开(公告)号：US20090229847A1
公开(公告)日：2009-09-17
申请号：US12379033
申请日：2009-02-11
申请人： Stephen A. Long , David R. Trainer , Linhua Hu , Huw L. Edwards
发明人： Stephen A. Long , David R. Trainer , Linhua Hu , Huw L. Edwards
IPC分类号： H01R4/66
摘要： An earthing arrangement for a DC electrical system (10), the electrical system (10) comprises a plurality of earthing points (24A, 24B, 24C) and each earthing point (24A, 24B, 24C) is directly and permanently connected to earth (26) by a high impedance connection (28A, 28B, 28C). Each earthing point (24A, 24B, 24C) is selectively connectable to earth (26) in electrical parallel with the high impedance connection (28A, 28B, 28C) by a solid connection (30A, 30B, 30C) and a switch (32A, 32B, 32C). In first mode of operation the switch (32A) between the earthing point (24A) and the earth (26) of only one of the plurality of earthing points (24A, 24B, 24C) is closed.
摘要翻译： 一种用于DC电气系统（10）的接地装置，电气系统（10）包括多个接地点（24A，24B，24C），并且每个接地点（24A，24B，24C）直接并永久地连接到地面 26）通过高阻抗连接（28A，28B，28C）。 每个接地点（24A，24B，24C）通过固体连接（30A，30B，30C）和开关（32A，24B，24C）可选择地连接到与高阻抗连接（28A，28B，28C）并联的接地（26） 32B，32C）。 在第一操作模式中，接地点（24A）和多个接地点（24A，24B，24C）中仅一个接地点（26）之间的开关（32A）闭合。
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公开(公告)号：US20100039741A1
公开(公告)日：2010-02-18
申请号：US12458237
申请日：2009-07-06
IPC分类号： H02H3/00
CPC分类号： H02H7/30 , H02H1/0061 , H02H7/261
摘要： Electrical distribution networks (9) are provided between an electrical power source (10, 42, 43, 50, 65) and electrical loads (11, 12, 13) in the form of a number of connections (A to G). Faults can occur within the electrical distribution network (9) resulting in fault electrical currents which may damage the network (9). An electrical protection arrangement comprises fault current flow detectors (A′ to G′, AA, BB, AAA to DDD) in a hierarchy of levels defined by cascades of connections it is possible to utilise a controller to actively trip a circuit breaker associated with a respective fault current flow detector (A′ to G′, AA, BB, AAA to DDD). In such circumstances by considering the level response from each fault current flow detector (A′ to G′, AA, BB, AAA to DDD) against a threshold, typically in a binary format, the controller determines by sequential movement along a fault path (31, 62) at which level in the hierarchy of levels the circuit breaker should be tripped to isolate parts of the electrical distribution network (9). Generally, the lowest level within a hierarchy of levels is tripped to isolate the minimum amount of the electrical distribution network (9) leaving the remainder of the electrical distribution network (9) operational.
摘要翻译： 配电网（9）设置在多个连接（A至G）形式的电源（10,42,43,50,65）和电负载（11,12,13）之间。 在配电网络（9）内可能会发生故障，导致可能损坏网络（9）的故障电流。 电气保护装置包括在由连接级联限定的层级中的故障电流流量检测器（A'至G'，AA，BB，AAA至DDD），可以利用控制器主动跳闸与 各自的故障电流检测器（A'至G'，AA，BB，AAA至DDD）。 在这种情况下，通过考虑来自每个故障电流流量检测器（A'至G'，AA，BB，AAA至DDD）的电平响应（通常以二进制格式），控制器通过沿故障路径 31，62）断路器应在跳闸级别的层级中隔离配电网络（9）的部分。 通常，级别层级中的最低级别被跳闸以隔离离开电力分配网络（9）的其余部分的可配置的配电网络（9）的最小量。
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公开(公告)号：US20100117569A1
公开(公告)日：2010-05-13
申请号：US12451819
申请日：2008-06-13
申请人： David R. Trainer , John J.A. Cullen , Alan J. Mitcham , Andrew M. Cross , Andrew J. Forsyth , Ahmed A-M Abdel-Hafez
发明人： David R. Trainer , John J.A. Cullen , Alan J. Mitcham , Andrew M. Cross , Andrew J. Forsyth , Ahmed A-M Abdel-Hafez
IPC分类号： H02P27/00
CPC分类号： H02P9/00 , H02P9/006 , H02P25/22 , H02P29/0243 , H02P29/032 , H02P29/50 , H02P2101/30
摘要： A synchronous electrical machine comprising a plurality of phases, detecting means arranged to detect a fault in at least one of the phases of the synchronous electrical machine, isolating means arranged to isolate the at least one phase of the synchronous electrical machine with the fault, phase shift means arranged to produce a controlled phase shift between the voltage and the current within the remaining phases of the synchronous electrical machine to adjust the phase angle and magnitude of the second harmonic powers produced by the remaining phases of the synchronous electrical machine such that the vector sum of the second harmonic power vectors of the remaining phases of the synchronous electrical machine is zero.
摘要翻译： 一种包括多相的同步电机，被配置为检测所述同步电机的至少一相中的故障的检测装置，被配置为将所述同步电机的至少一相与故障相隔离的隔离装置 移位装置被布置成在同步电机的剩余相位内的电压和电流之间产生受控的相移，以调整由同步电机的剩余相产生的二次谐波功率的相位角和幅度，使得矢量 同步电机的其余相的二次谐波功率矢量的和为零。
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