-
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。
-
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。
-
公开(公告)号：US09018805B2
公开(公告)日：2015-04-28
申请号：US13426073
申请日：2012-03-21
申请人： John J. A. Cullen , David S. Knott
发明人： John J. A. Cullen , David S. Knott
摘要： A machine such as a ship's engine has a superconducting component requiring cooling for its operation, and includes a cooling system. The cooling system is operable in first and second modes. In a cool-down phase the cooling system is run in the first mode providing relatively high heat transfer from the superconducting component. On attainment of a desired operating temperature the cooling system is run in the second mode, providing lower heat transfer. This enables a reduced cool-down time of the machine, while allowing economical operation in normal service. The higher level of cooling in the first mode used during the start-up procedure can involve a colder cryogen, or a greater flow of coolant. One way of achieving the latter is to circulate the coolant in normally evacuated regions during the cool-down phase, and then re-establishing the vacuum in these regions for normal service operation.
摘要翻译： 诸如船舶发动机的机器具有需要对其操作进行冷却的超导部件，并且包括冷却系统。 冷却系统可在第一和第二模式下操作。 在冷却阶段，冷却系统以第一模式运行，从超导部件提供较高的热传递。 在达到期望的工作温度时，冷却系统在第二模式下运行，提供较低的热传递。 这使得能够减少机器的冷却时间，同时允许正常服务中的经济运行。 在启动过程中使用的第一种模式下的较高冷却水平可能涉及较冷的冷冻剂或更大的冷却液流。 实现后者的一种方法是在冷却阶段期间将冷却剂循环在正常抽空的区域中，然后在这些区域中重新建立真空用于正常维护操作。
-
公开(公告)号：US20080197724A1
公开(公告)日：2008-08-21
申请号：US12010272
申请日：2008-01-23
申请人： John J. A. Cullen , David J. Powell
发明人： John J. A. Cullen , David J. Powell
IPC分类号： H02K9/04
摘要： A component of an electric machine 46, the component comprising a core 10; two or more teeth 14 extending radially therefrom; at least one electromagnetic winding 12, each winding 12 around at least one of the teeth 14; wherein the core 10 having a cooling arrangement including at least one cooling insert 48 located between adjacent windings 12 and whereby in use a cooling fluid being arranged to flow through the at least one cooling insert 48 to facilitate heat transfer and dissipation from the electromagnetic windings 12. The cooling inserts providing improved cooling, structural support to the windings, and electrical insulation between the windings and the core.
摘要翻译： 电机46的部件，该部件包括芯部10; 两个或更多个从其径向延伸的齿14; 至少一个电磁绕组12，围绕至少一个齿14的绕组12; 其中芯部10具有冷却装置，该冷却装置包括位于相邻绕组12之间的至少一个冷却插入件48，由此在使用中设置有冷却流体流过至少一个冷却插入件48以促进从电磁绕组12传热和耗散 。 冷却插件提供改进的冷却，对绕组的结构支撑，以及绕组和芯之间的电绝缘。
-
公开(公告)号：US20110285491A1
公开(公告)日：2011-11-24
申请号：US13143632
申请日：2010-01-08
IPC分类号： H01F38/18
CPC分类号： H01F38/18 , H01F3/10 , H01F27/245
摘要： A rotary transformer is disclosed which includes a primary core having a primary coil wound thereon, and a secondary core having a secondary coil wound thereon, wherein said cores are mounted for relative rotation about an axis of rotation. One of said cores includes a plurality of core segments arranged in spaced-apart relation relative to one another in a substantially circular array about said axis, the other core having a substantially annular configuration. In a particular embodiment, said primary core is fixed and hence remains static during operation, and includes a plurality of spaced apart core segments arranged in a circular array around said axis.
摘要翻译： 公开了一种旋转变压器，其包括具有卷绕在其上的初级线圈的初级线圈和缠绕在其上的次级线圈的次级线圈，其中所述铁心围绕旋转轴线相对旋转安装。 所述芯中的一个包括围绕所述轴线以基本圆形的阵列相对于彼此间隔开的关系布置的多个芯部段，另一个芯具有基本上环形的构造。 在特定实施例中，所述主芯是固定的并且因此在操作期间保持静止，并且包括围绕所述轴线以圆形阵列布置的多个间隔开的芯段。
-
-
-
-
搜索结果
5 条记录 (耗时 0.022 秒)
