公开(公告)号：US5059884A

公开(公告)日：1991-10-22

申请号：US506818

申请日：1990-04-10

申请人： Mahesh J. Shah ,  Jayant G. Vaidya

发明人： Mahesh J. Shah ,  Jayant G. Vaidya

IPC分类号： H02K21/38

CPC分类号： H02K21/44

摘要： A variable reluctance motor (10, 100, 200) for providing holding torque in accordance with the invention includes a magnetically permeable rotor (12); a stator (18) axially aligned with the rotor having at least one phase winding (22) for producing a magnetic field causing the rotor to rotate; and a first cylindrical magnet (26) mounted coaxial with and outboard from a first side of the rotor which creates a permanent magnetic field coupling the rotor to the magnet to provide holding torque.

摘要翻译： 根据本发明的用于提供保持扭矩的可变磁阻电动机（10,100,200）包括一个可磁化转子（12）; 与所述转子轴向对准的具有至少一个相绕组（22）的定子（18），用于产生使所述转子旋转的磁场; 以及与转子的第一侧同轴并且从外侧安装的第一圆柱形磁体（26），其产生将转子耦合到磁体以提供保持转矩的永久磁场。

公开(公告)号：US08148866B2

公开(公告)日：2012-04-03

申请号：US12147654

申请日：2008-06-27

申请人： Mahesh J. Shah

发明人： Mahesh J. Shah

IPC分类号： H02K3/00

CPC分类号： H02K21/042

摘要： A permanent magnet rotor for an electrical generator has pole pieces with permanent magnets. A control coil is associated with the pole pieces. A current flow through the coils is controlled to achieve a desired output voltage at an output for the generator.

摘要翻译： 用于发电机的永磁转子具有带有永磁体的极片。 控制线圈与极片相关联。 控制通过线圈的电流以在发生器的输出处获得期望的输出电压。

公开(公告)号：US08014179B2

公开(公告)日：2011-09-06

申请号：US12128647

申请日：2008-05-29

申请人： Weiwei Qi ,  Mahesh J. Shah

发明人： Weiwei Qi ,  Mahesh J. Shah

IPC分类号： H02M5/45

CPC分类号： H02P9/48 ,  H02M3/3378 ,  H02M7/2176 ,  H02P9/14 ,  H02P9/307 ,  H02P2101/30

摘要： In typical commercial/aerospace applications, synchronous generators provide power to both the high voltage and the low voltage loads. This disclosure describes a method of regulating the output voltage for all of the loads.

摘要翻译： 在典型的商业/航空应用中，同步发电机为高压和低压负载提供电力。 本公开描述了一种调节所有负载的输出电压的方法。

公开(公告)号：US07439715B2

公开(公告)日：2008-10-21

申请号：US11439480

申请日：2006-05-22

申请人： Gregory I. Rozman ,  Mahesh J. Shah ,  Alan E. King

发明人： Gregory I. Rozman ,  Mahesh J. Shah ,  Alan E. King

IPC分类号： H02P9/00

CPC分类号： H02J7/1438 ,  H02M3/1582 ,  H02P9/307

摘要： A power generating system provides high voltage AC power and low voltage DC power using a single generator. The generator includes a rotor and a stator that is wound with a first winding and a second winding. The first winding has a greater number of turns than the second winding and generates high voltage AC power in response to the rotating magnetic field created by the rotor. The second winding generates low voltage AC power in response to the rotating magnetic field created by the rotor. The low voltage AC power is converted to low voltage DC power by a rectifier. The low voltage DC power is further controlled by a DC-DC converter to generate controlled DC power. A controller monitors the DC power generated by the DC-DC converter, and generates pulse width modulation signals that are provided to the DC-DC converter, selectively increasing or decreasing the controlled DC power provided by the DC-DC converter.

摘要翻译： 发电系统使用单个发电机提供高压交流电源和低压直流电源。 该发电机包括一个转子和一个用第一绕组和第二绕组缠绕的定子。 第一绕组具有比第二绕组更大的匝数，并且响应于由转子产生的旋转磁场而产生高压AC电力。 第二绕组响应于由转子产生的旋转磁场产生低压AC电力。 低压交流电源由整流器转换成低压直流电源。 低压直流电源由DC-DC转换器进一步控制，以产生受控的直流电源。 控制器监视由DC-DC转换器产生的DC电力，并产生提供给DC-DC转换器的脉冲宽度调制信号，选择性地增加或减少由DC-DC转换器提供的受控直流电力。

公开(公告)号：US07298282B2

公开(公告)日：2007-11-20

申请号：US10831873

申请日：2004-04-26

申请人： James R. Gustafson ,  Mahesh J. Shah

发明人： James R. Gustafson ,  Mahesh J. Shah

IPC分类号： G08B21/00

CPC分类号： G01R31/343

摘要： A method and system for monitoring the performance of a permanent magnet device, such as a motor or generator, and providing early detection of motor performance deterioration. The back electromotive force (EMF) of the motor is measured at selected conditions when the motor is in a normal healthy condition to obtain a reference signature response. A measured signature is then obtained periodically during the life of the motor at the same conditions as the reference signature to check the current back EMF characteristic of the motor. If the measured signature deviates from the reference signature by a predetermined threshold, it indicates that the motor performance has degraded to a condition requiring attention.

摘要翻译： 用于监测诸如电动机或发电机的永久磁铁装置的性能的方法和系统，并且提供电机性能劣化的早期检测。 当电机处于正常健康状态时，在选定的条件下测量电动机的反电动势（EMF），以获得参考标识响应。 然后在电机寿命期间以与参考标志相同的条件周期性地获得测量的签名，以检查电机的当前反电动势特性。 如果测量的签名偏离参考签名预定的阈值，则表明电机的性能已经下降到需要注意的条件。

公开(公告)号：US5097163A

公开(公告)日：1992-03-17

申请号：US454969

申请日：1989-12-22

申请人： Mahesh J. Shah ,  Derek N. Walton ,  Clarence F. Dolan

发明人： Mahesh J. Shah ,  Derek N. Walton ,  Clarence F. Dolan

IPC分类号： H02K11/00 ,  H02K11/02 ,  H02K19/36

CPC分类号： H02K11/022 ,  H02K11/00 ,  H02K11/01 ,  H02K19/36 ,  H02K19/365 ,  H02K11/02

摘要： A brushless electrical power generating system (10) in accordance with the invention includes a main generator (16) having a rotor (30) on which is wound a field winding (32) and a stator (112) on which is wound a winding (36) for producing an alternating current electrical output having at least one phase; an exciter (14) having a rotor (24) mounted coaxial to the rotor of the main generator and a stator (110) on which is wound a stator winding (18) and an electrical field shield (40) disposed between the stators of the exciter and the main generator for shielding the winding of the stator of the main generator from an electric field produced by the winding of the stator of the exciter whereby capacitive coupling of any electrical noise present within the current flowing in the stator winding of the exciter to the alternating current electrical power output is reduced.

摘要翻译： 根据本发明的无刷电力发电系统（10）包括具有转子（30）的主发电机（16），绕组绕组（32）和定子（112）缠绕在绕组上 36），用于产生具有至少一个相位的交流电输出; 具有与主发电机的转子同轴安装的转子（24）的励磁机（14）和定子绕组（18）和电场屏蔽（40）的定子（110），所述定子绕组 励磁机和主发电机，用于将主发电机的定子的绕组与由励磁机的定子的绕组产生的电场进行屏蔽，由此存在于在励磁机的定子绕组中流动的电流内的任何电噪声的电容耦合到 交流电力输出减少。

公开(公告)号：US5079462A

公开(公告)日：1992-01-07

申请号：US485489

申请日：1990-02-27

申请人： Mahesh J. Shah ,  Clarence F. Dolan ,  Derek N. Walton

发明人： Mahesh J. Shah ,  Clarence F. Dolan ,  Derek N. Walton

IPC分类号： H01F27/36 ,  H01F38/38 ,  H02K11/00 ,  H02K19/36

CPC分类号： H01F27/365 ,  H01F38/38 ,  H02K11/00 ,  H02K19/36

摘要： A brushless generator in accordance with the present invention includes a main generator having a stator (12) on which is wound at least one phase winding (52-56), each phase winding producing a phase output (.PHI.A-.PHI.C); a number of current transformers (20-24) equal in number to a number of phases present in the main generator, each current transformer being magnetically coupled to a conductor (48) of a different phase winding; and a plurality of annular disks (40), equal in number of the number of phases, each annular disk having an annulus (46) containing the conductor of the phase winding of a different phase, slot (42) extending from an inner radius (44) defining the annulus to an outer radius (50) defining an outer cirucmference of the disk, each annular disk being held by a support (10) for the current transformer, having a permeability greater than 1020-type steel and attenuating harmonics of a fundamental frequency of AC produced by the main generator.

摘要翻译： 根据本发明的无刷发电机包括具有定子（12）的主发电机，在其上缠绕有至少一个相绕组（52-56），每相绕组产生相输出（PHI-PHI C）; 多个与主发电机中存在的相数相等的电流互感器（20-24），每个电流互感器磁耦合到不同相绕组的导体（48）; 以及多个相位数相等的环形盘（40），每个环形盘具有一个环（46），该环形盘包含不同相位的相绕组的导体，槽（42）从内半径 44）限定环形到限定盘的外部圆周的外半径（50），每个环形盘由用于电流互感器的支撑件（10）保持，其具有大于1020型钢的磁导率和衰减的谐波 主发电机产生的交流电频率。

公开(公告)号：US4847745A

公开(公告)日：1989-07-11

申请号：US272061

申请日：1988-11-16

申请人： Sampat S. Shekhawat ,  Mahesh J. Shah ,  Jayant G. Vaidya ,  John J. Dhyanchand

发明人： Sampat S. Shekhawat ,  Mahesh J. Shah ,  Jayant G. Vaidya ,  John J. Dhyanchand

IPC分类号： H02M5/10 ,  H02M7/5387

CPC分类号： H02M7/5387 ,  H02M5/10

摘要： A three phase inverter (40) is disclosed for use with loads (100) which are unbalanced. A transformer (80) having primary windings (82), (84) and (86) which are respectively connected to phase outputs (52, 54 and 56) has a secondary having individual windings (88, 90 and 92) connected in a delta configuration which minimizes the flow of unbalanced current in the unbalanced load. A second embodiment utilizes a transformer in an interconnected configuration. A neutral connecting the conductive switches to the load is unnecessary with the invention.

摘要翻译： 公开了一种与不平衡的负载（100）一起使用的三相逆变器（40）。 具有分别连接到相位输出（52,54和56）的初级绕组（82），（84）和（86）的变压器（80）具有次级绕组（88,90和92），其具有以三角形 配置，其使不平衡负载中的不平衡电流的流动最小化。 第二实施例利用互连配置中的变压器。 本发明不需要将导电开关连接到负载的中性线。