公开(公告)号：US20090322290A1

公开(公告)日：2009-12-31

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： H02P9/14

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：US20080136294A1

公开(公告)日：2008-06-12

申请号：US11634607

申请日：2006-12-06

申请人： Theodore Clifton Powers ,  Michael Raymond Hernden ,  Mahesh J. Shah

发明人： Theodore Clifton Powers ,  Michael Raymond Hernden ,  Mahesh J. Shah

IPC分类号： H02K16/02 ,  H02K9/04 ,  H02K21/00 ,  H02P9/00 ,  H02K1/27 ,  H02K7/14

CPC分类号： H02K21/029 ,  H02K16/02

摘要： A self-regulating permanent magnet device has a first rotor segment and second rotor segment, each supporting a set of permanent magnets, wherein the position of the second rotor segment relative to the first rotor segment is modified based on the speed of the self-regulating permanent magnet device. By modifying the position of the second rotor segment relative to the first rotor segment, the alignment between their respective sets of permanent magnets, and therefore, the electromotive force (emf) generated in the stator coils is regulated. The position of the second rotor segment is defined by the connection of a torsion spring between the first rotor segment and second rotor segment and a reactionary torque device connected to the second rotor segment. The torsion spring creates a spring force that acts to maintain the alignment between the first rotor segment and the second rotor segment. The reactionary torque device provides reactionary torque that is proportional to the speed of the self-regulating permanent magnet device and opposes the spring force. As the speed of the self-regulating permanent magnet device increases, the reactionary torque causes the second rotor segment to rotate, thereby creating a misalignment between the first rotor segment and second rotor segment.

摘要翻译： 自调节永磁体装置具有第一转子段和第二转子段，每个第一转子段和第二转子段支撑一组永磁体，其中第二转子段相对于第一转子段的位置基于自调节的速度而被修改 永磁装置。 通过修改第二转子段相对于第一转子段的位置，调节它们各组永磁体之间的对准，并因此调整定子线圈中产生的电动势（emf）。 第二转子段的位置由第一转子段和第二转子段之间的扭转弹簧的连接以及连接到第二转子段的反作用扭矩装置来限定。 扭转弹簧产生用于保持第一转子段和第二转子段之间的对准的弹簧力。 反作用扭矩装置提供与自调节永磁体装置的速度成比例的反作用扭矩，并且与弹簧力相反。 随着自调节永磁体装置的速度增加，反作用转矩使第二转子段转动，由此在第一转子段和第二转子段之间产生未对准。

公开(公告)号：US5880571A

公开(公告)日：1999-03-09

申请号：US927852

申请日：1997-09-11

申请人： George H. Seffernick ,  Mahesh J. Shah

发明人： George H. Seffernick ,  Mahesh J. Shah

IPC分类号： H02P25/20 ,  H02P1/38

CPC分类号： H02P25/20

摘要： A method of and system for controlling an induction motor detects input frequency to the motor and connects windings of the motor in one of a plurality of configurations in dependence upon the detected frequency.

摘要翻译： 用于控制感应电动机的方法和系统根据检测到的频率来检测对电动机的输入频率，并将电动机的绕组以多个配置之一连接。

公开(公告)号：US07642683B2

公开(公告)日：2010-01-05

申请号：US11634607

申请日：2006-12-06

申请人： Theodore Clifton Powers ,  Michael Raymond Hernden ,  Mahesh J. Shah

发明人： Theodore Clifton Powers ,  Michael Raymond Hernden ,  Mahesh J. Shah

IPC分类号： H02K16/00

CPC分类号： H02K21/029 ,  H02K16/02

摘要： A self-regulating permanent magnet device has a first rotor segment and second rotor segment, each supporting a set of permanent magnets, wherein the position of the second rotor segment relative to the first rotor segment is modified based on the speed of the self-regulating permanent magnet device. By modifying the position of the second rotor segment relative to the first rotor segment, the alignment between their respective sets of permanent magnets, and therefore, the electromotive force (emf) generated in the stator coils is regulated. The position of the second rotor segment is defined by the connection of a torsion spring between the first rotor segment and second rotor segment and a reactionary torque device connected to the second rotor segment. The torsion spring creates a spring force that acts to maintain the alignment between the first rotor segment and the second rotor segment. The reactionary torque device provides reactionary torque that is proportional to the speed of the self-regulating permanent magnet device and opposes the spring force. As the speed of the self-regulating permanent magnet device increases, the reactionary torque causes the second rotor segment to rotate, thereby creating a misalignment between the first rotor segment and second rotor segment.

摘要翻译： 自调节永磁体装置具有第一转子段和第二转子段，每个第一转子段和第二转子段支撑一组永磁体，其中第二转子段相对于第一转子段的位置基于自调节的速度而被修改 永磁装置。 通过修改第二转子段相对于第一转子段的位置，调节它们各组永磁体之间的对准，并因此调整定子线圈中产生的电动势（emf）。 第二转子段的位置由第一转子段和第二转子段之间的扭转弹簧的连接以及连接到第二转子段的反作用扭矩装置来限定。 扭转弹簧产生用于保持第一转子段和第二转子段之间的对准的弹簧力。 反作用扭矩装置提供与自调节永磁体装置的速度成比例的反作用扭矩，并且与弹簧力相反。 随着自调节永磁体装置的速度增加，反作用转矩使第二转子段转动，由此在第一转子段和第二转子段之间产生未对准。

公开(公告)号：US5023540A

公开(公告)日：1991-06-11

申请号：US454968

申请日：1989-12-22

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

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

IPC分类号： H02K19/26 ,  H02K19/36 ,  H02P9/30

CPC分类号： H02K19/365 ,  H02K19/26 ,  H02K19/36 ,  H02P9/302

摘要： A brushless electrical power generating system (100) in accordance with the invention includes an exciter (14) for producing alternating current from an exciter rotor; a rectifier (20) mounted for rotation with the exciter rotor for producing a rectified control current from the AC current; a common mode inductor (112), coupled to the control current, for cancelling common mode noise components within the rectified control current; and a main generator (22), having a rotating field winding (24) mounted on a main generator rotor excited by the control current and producing an alternating current power output from a stator.

摘要翻译： 根据本发明的无刷电力发电系统（100）包括用于从励磁机转子产生交流电的励磁机（14）; 整流器（20），其安装成与所述励磁机转子一起旋转，用于从所述AC电流产生整流的控制电流; 耦合到控制电流的共模电感器（112），用于消除整流控制电流内的共模噪声分量; 和主发电机（22），其具有安装在由所述控制电流激励的主发电机转子上的旋转励磁绕组（24），并产生从定子输出的交流电力。

公开(公告)号：US4093867A

公开(公告)日：1978-06-06

申请号：US736036

申请日：1976-10-27

申请人： Mahesh J. Shah ,  Joseph P. Mallozzi

发明人： Mahesh J. Shah ,  Joseph P. Mallozzi

IPC分类号： G01N21/27 ,  G08B29/14 ,  G01N21/26

CPC分类号： G08B29/145 ,  G01N21/274

摘要： Apparatus for automatically calibrating smoke detectors within desired ranges of values of smoke obscuration, and thereafter retesting them for valid calibration; in accomplishing this the smoke obscuration is continuously increased at a predetermined uniform rate.

摘要翻译： 用于将烟雾探测器自动校准在烟雾遮蔽值的期望范围内，然后重新测试以进行有效校准的装置; 在实现这一点时，烟雾遮蔽以预定的均匀速率不断增加。

公开(公告)号：US07550953B2

公开(公告)日：2009-06-23

申请号：US11478282

申请日：2006-06-29

申请人： Mahesh J. Shah

发明人： Mahesh J. Shah

IPC分类号： H02P9/14 ,  H02K1/00 ,  H02K3/00

CPC分类号： H02P25/20 ,  H02K3/28 ,  H02K2213/09 ,  H02P9/48

摘要： A permanent magnet generator voltage regulation system controls the output voltage of a permanent magnet generator. The output voltage of the permanent magnet generator is controlled by configuring the electrical connection of the stator coils. A monitoring device monitors the output voltage generated by the PMG, and a controller selectively configures the stator coil configuration based on the monitored output voltage. A switch array having a number of switches is connected to the stator coils, the switches being controlled by the controller to configure the electrical connection of the stator coils. For instance, to maximize output voltage generated by the PMG, the controller causes the switch array to connect the stator coils in series with one another. To reduce the output voltage, the controller causes the switch array to connect at least some of the stator coils in parallel with one another. In this way, the output voltage of the permanent magnet generator can be coarsely controlled.

摘要翻译： 永磁发电机电压调节系统控制永磁发电机的输出电压。 通过配置定子线圈的电连接来控制永磁发电机的输出电压。 监视装置监视由PMG产生的输出电压，并且控制器基于所监视的输出电压选择性地配置定子线圈配置。 具有多个开关的开关阵列连接到定子线圈，开关由控制器控制以构成定子线圈的电连接。 例如，为了使由PMG产生的输出电压最大化，控制器使开关阵列彼此串联连接定子线圈。 为了减小输出电压，控制器使开关阵列彼此平行地连接至少一些定子线圈。 以这种方式，可以粗略地控制永磁发电机的输出电压。

公开(公告)号：US20080043383A1

公开(公告)日：2008-02-21

申请号：US11505739

申请日：2006-08-17

申请人： Mahesh J. Shah ,  Chai-Nam Ng ,  George Seffernick

发明人： Mahesh J. Shah ,  Chai-Nam Ng ,  George Seffernick

IPC分类号： H02H7/06

CPC分类号： H02H7/06 ,  H02P9/102 ,  H02P9/107 ,  H02P29/60

摘要： A fault protection system provides fault protection to a permanent magnet (PM) generator. The fault protection system includes one or more overload and short-circuit protection circuits, an unbalanced protection circuit and a thermal protection circuit. The overload and short-circuit protection circuit detects both overload and short-circuit conditions by monitoring current and voltage generated at a single phase by the PM generator. The unbalanced protection circuit monitors and compares current and voltage generated associated with at least two individual phases to determine unbalanced conditions between the phases. The thermal protection circuit detects a thermal overload condition by monitoring the temperature of the PM generator. If the overload and short circuit protection circuit, the unbalanced protection circuit, or the thermal protection circuit detects a fault signal, a control circuit causes a control device to reduce or prevent mechanical power from being supplied to the PM generator, preventing the PM generator from generating power and protecting it from damage.

摘要翻译： 故障保护系统为永磁（PM）发生器提供故障保护。 故障保护系统包括一个或多个过载和短路保护电路，不平衡保护电路和热保护电路。 过载和短路保护电路通过监测PM发电机在单相中产生的电流和电压来检测过载和短路情况。 不平衡保护电路监测和比较与至少两个单独相位相关的电流和电压，以确定相之间的不平衡条件。 热保护电路通过监测PM发生器的温度来检测热过载状态。 如果过载和短路保护电路，不平衡保护电路或热保护电路检测到故障信号，控制电路使控制装置减少或防止机械电源供给PM发电机，防止PM发电机 发电，防止损坏。

公开(公告)号：US20080001580A1

公开(公告)日：2008-01-03

申请号：US11478282

申请日：2006-06-29

申请人： Mahesh J. Shah

发明人： Mahesh J. Shah

IPC分类号： H02P9/14

CPC分类号： H02P25/20 ,  H02K3/28 ,  H02K2213/09 ,  H02P9/48

摘要： A permanent magnet generator voltage regulation system controls the output voltage of a permanent magnet generator. The output voltage of the permanent magnet generator is controlled by configuring the electrical connection of the stator coils. A monitoring device monitors the output voltage generated by the PMG, and a controller selectively configures the stator coil configuration based on the monitored output voltage. A switch array having a number of switches is connected to the stator coils, the switches being controlled by the controller to configure the electrical connection of the stator coils. For instance, to maximize output voltage generated by the PMG, the controller causes the switch array to connect the stator coils in series with one another. To reduce the output voltage, the controller causes the switch array to connect at least some of the stator coils in parallel with one another. In this way, the output voltage of the permanent magnet generator can be coarsely controlled.

摘要翻译： 永磁发电机电压调节系统控制永磁发电机的输出电压。 通过配置定子线圈的电连接来控制永磁发电机的输出电压。 监视装置监视由PMG产生的输出电压，并且控制器基于所监视的输出电压选择性地配置定子线圈配置。 具有多个开关的开关阵列连接到定子线圈，开关由控制器控制以构成定子线圈的电连接。 例如，为了使由PMG产生的输出电压最大化，控制器使开关阵列彼此串联连接定子线圈。 为了减小输出电压，控制器使开关阵列彼此平行地连接至少一些定子线圈。 以这种方式，可以粗略地控制永磁发电机的输出电压。

公开(公告)号：US20070268004A1

公开(公告)日：2007-11-22

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： H02H7/06 ,  H02P11/00 ,  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。