公开(公告)号：US08981705B2

公开(公告)日：2015-03-17

申请号：US13074513

申请日：2011-03-29

Applicant: Krishnan Ramu

Inventor： Krishnan Ramu

IPC: H02P1/26 ,  H02K1/14 ,  H02K3/18

CPC classification number: H02K1/14 ,  H02K3/18 ,  H02K2213/03 ,  H02P7/281

Abstract: An inverter for a permanent magnet brushless dc machine, having a permanent magnet rotor and a set of stator windings, applies the full dc voltage provided to the inverter to each phase of the machine.

Abstract translation: 一种用于永磁无刷直流电机的逆变器，具有永磁转子和一组定子绕组，将提供给逆变器的全直流电压施加到机器的每个相。

公开(公告)号：US08901798B2

公开(公告)日：2014-12-02

申请号：US12601903

申请日：2008-05-30

Applicant: Krishnan Ramu ,  Nimai Lobo ,  Cheewoo Lee

Inventor： Krishnan Ramu ,  Nimai Lobo ,  Cheewoo Lee

IPC: H02K19/12 ,  H02K1/14 ,  H02K19/10

CPC classification number: H02K1/14 ,  H02K19/106

Abstract: A two-phase switched reluctance machine is provided using discontinuous core structures as the stator for low-cost, high-performance drives. This discontinuous stator core structure contains short flux paths and maximum overlap between the rotor poles and stator poles in the stator discontinuous core structures, regardless of the rotor position. Example configurations of such core structure include E-core, L-core and I-core configurations. Using less steel and magnet wire than in conventional SRM designs results in cost savings of stator material and winding material. Efficiency of this novel SRM is improved because of shorter flux paths resulting in reduction of core losses and decreased phase resistance resulting in reduction of copper losses. Two-phase simultaneous excitation of the novel SRM can reduce torque ripple during commutation as compared with existing two-phase SRMs.

Abstract translation: 使用不连续的核心结构作为用于低成本，高性能的驱动器的定子来提供两相开关磁阻电机。 这种不连续的定子铁芯结构在定子不连续的铁芯结构中包含短的磁通路径和转子磁极和定子极之间的最大重叠，而与转子位置无关。 这种核心结构的示例配置包括E核，L核和I核配置。 使用比常规SRM设计更少的钢和电线导致定子材料和绕组材料的成本节约。 这种新型SRM的效率得到改善，因为较短的磁通路径导致磁芯损耗的减小和相位阻力的降低，导致铜损耗的减少。 与现有的两相SRM相比，新型SRM的两相同步励磁可以减少转换期间的转矩波动。

公开(公告)号：US08754605B2

公开(公告)日：2014-06-17

申请号：US13287221

申请日：2011-11-02

Applicant: Krishnan Ramu

Inventor： Krishnan Ramu

IPC: H02P1/46

CPC classification number: H02K1/32 ,  G01B11/26 ,  H02K1/14 ,  H02K1/146 ,  H02K1/148 ,  H02K1/20 ,  H02K1/24 ,  H02K15/12 ,  Y02T10/641

Abstract: An electrical device has a capacitive storage element and first and second switches. The capacitive storage element and first and second switches are interconnected such that when interconnected with a direct current (dc) voltage supply and first and second windings of an electrical machine: (1) a first operational state exists in which conductive states of the first and second switches cause the dc voltage supply to conduct current through the first winding and the first switch and conduct current through the first and second switches and the second winding, respectively, thereby storing energy within the first and second windings, and (2) a second operational state exists in which non-conductive states of the first and second switches cause each of the first and second windings to discharge stored energy by conducting current through the capacitive storage element, thereby storing energy in the capacitive storage element.

Abstract translation: 电气设备具有电容性存储元件和第一和第二开关。 电容性存储元件和第一和第二开关互连，使得当与直流（dc）电压源和电机的第一和第二绕组互连时：（1）存在第一操作状态，其中第一和第二开关的导电状态 第二开关导致直流电压源通过第一绕组和第一开关导通电流，并分别通过第一和第二开关和第二绕组传导电流，从而在第一和第二绕组内存储能量，以及（2）第二开关 存在操作状态，其中第一和第二开关的非导通状态通过使电流通过电容性存储元件而使第一和第二绕组中的每一个释放存储的能量，从而将能量存储在电容性存储元件中。

公开(公告)号：US08525450B2

公开(公告)日：2013-09-03

申请号：US13074628

申请日：2011-03-29

Applicant: Krishnan Ramu

Inventor： Krishnan Ramu

IPC: H02P1/46 ,  H02P6/00

CPC classification number: H02P6/14 ,  H02K1/14 ,  H02K3/18 ,  H02K2213/03

Abstract: Drive circuits that provide power factor correction and input current waveform shaping for controlling the speed and torque in a switched reluctance machine (SRM). The machine's phase windings are split into two segments, one of which is used for active power factor correction, input ac current waveform shaping and partial torque generation and the other of which is used for torque generation.

Abstract translation: 提供功率因数校正和输入电流波形整形的驱动电路，用于控制开关磁阻电机（SRM）中的速度和转矩。 机器相绕组分为两段，其中一段用于有功功率因数校正，输入交流电流波形整形和部分转矩生成，另一段用于转矩产生。

公开(公告)号：US20110187300A1

公开(公告)日：2011-08-04

申请号：US12672688

申请日：2008-08-13

Applicant: Krishnan Ramu

Inventor： Krishnan Ramu

IPC: H02P27/00

CPC classification number: H02P25/092 ,  H02P2201/15 ,  Y02P80/112

Abstract: A power factor correction system includes a rectifier that rectifies the voltage of an alternating current (ac) power source to produce a voltage waveform that transitions, in a half sinusoid, from a minimum amplitude to a maximum amplitude and back to the minimum amplitude twice in the period of the ac power source. A phase winding of a motor conveys current induced by the voltage waveform, and a regulator regulates the flow of the current conveyed by the phase winding for storage as energy in a storage component.

Abstract translation: 功率因数校正系统包括整流器，其对交流（AC）电源的电压进行整流，以产生电压波形，该电压波形在半正弦曲线中从最小幅度转换到最大幅度，并返回到最小振幅两次 交流电源的周期。 电动机的相绕组传递由电压波形引起的电流，并且调节器调节由相绕组输送的电流的流量作为能量存储在存储部件中。

公开(公告)号：US07271564B2

公开(公告)日：2007-09-18

申请号：US10996043

申请日：2004-11-24

Applicant: Krishnan Ramu

Inventor： Krishnan Ramu

IPC: H02P1/46 ,  H02P7/06

CPC classification number: H02K19/103 ,  H02K1/24 ,  H02K7/09 ,  H02K16/00 ,  H02K16/04 ,  H02K17/00 ,  H02K21/12 ,  H02M2001/009 ,  H02M2003/1552 ,  H02M2003/1555 ,  H02P1/163 ,  H02P1/18 ,  H02P6/21 ,  H02P25/034 ,  H02P25/089 ,  H02P25/092 ,  H02P2201/09

Abstract: A power converter for a switched reluctance motor or a permanent magnet brushless direct current (dc) motor may include first and second partial circuits for forming multiple conduction circuits in cooperation with first and second phase windings of the motor. The controller also includes a switch operable to open and close a first conduction circuit, which includes the first phase winding, and to regulate energization of the first and second phase windings of the motor through opening and closing the first conduction circuit. Control of the switch provides four-quadrant operation of the motor through regulated energization of the first and second phase windings.

Abstract translation: 用于开关磁阻电动机或永磁无刷直流（dc）电动机的功率转换器可以包括用于与电动机的第一和第二相绕组协作形成多个导通电路的第一和第二部分电路。 该控制器还包括可操作以打开和关闭包括第一相绕组的第一导通电路的开关，并且通过打开和闭合第一导电电路来调节电动机的第一和第二相绕组的通电。 开关的控制通过第一和第二相绕组的调节通电来提供电机的四象限运行。

公开(公告)号：US07134396B2

公开(公告)日：2006-11-14

申请号：US10728344

申请日：2003-12-02

Applicant: Krishnan Ramu

Inventor： Krishnan Ramu

IPC: B61C3/00

CPC classification number: B60L13/10 ,  B60L2200/26 ,  B60L2220/18

Abstract: A translation system, applicable in trains, elevators, aircraft launchers, rail guns, conveyors, door openers, machine tools and servo drives, includes a first linear switch reluctance machine (“LSRM”) having a stator and a translator each configured, positioned and proportioned for electromagentic engagement with the other. The system further includes an assembly for selectable application of at least one phase of a multiphasic DC excitation to the LSRM to produce a longitudinal or propulsive force between the stator and translator. The system further includes an assembly for the substantially simultaneous application of at least two phases of the DC excitation to the LSRM to produce a continual normal force between the stator and translator. A second LSRM may be provided, positioned in quadrature to the first LSRM, and in electromagetic engagement with it. A multi-phasic excitation of a stator and translator of the second LSRM produces both a guidance force for the first LSRM using error values generated by it and an additional propulsive force. Independent control of the phasic excitations for each of said propulsive, lift, and guidance forces may be provided.

Abstract translation: 适用于火车，电梯，飞机发射器，轨道枪，输送机，开门器，机床和伺服驱动器的翻译系统包括具有定子和平移器的第一线性开关磁阻电机（“LSRM” 与其他电磁接合成比例。 该系统还包括用于可选择地向LSRM施加多相DC激励的至少一相的组件，以在定子和转子之间产生纵向或推进力。 该系统还包括用于基本上同时向LSRM施加至少两个DC励磁相的组件，以在定子和转子之间产生连续的法向力。 可以提供第二LSRM，其位置与第一LSRM成正交，并且与其电气接合。 第二LSRM的定子和转子的多相激励使用由其产生的误差值和附加的推进力产生用于第一LSRM的引导力。 可以提供对于每个所述推进，升降和引导力的相位激励的独立控制。

公开(公告)号：US20050156475A1

公开(公告)日：2005-07-21

申请号：US10999218

申请日：2004-11-24

Applicant: Krishnan Ramu ,  Amanda Staley

Inventor： Krishnan Ramu ,  Amanda Staley

IPC: H02K17/00 ,  H02K19/10 ,  H02K19/24

CPC classification number: H02K1/246 ,  H02K19/103

Abstract: A two-phase switched reluctance motor in an embodiment includes a plurality of salient rotor poles that each have asymmetric reluctances about a central radial axis of the respective rotor pole. Each of the rotor poles has the same width, and the rotor poles are operable to provide preferential torque generation in one direction of rotation for all rotor positions. Such preferential torque generation occurs under the influence of an electromagnetic flux, which is provided by a plurality of salient stator poles having substantially the same width as the rotor poles.

Abstract translation: 在一个实施例中的两相开关磁阻电动机包括多个凸极转子极，它们各自具有关于相应转子极的中心径向轴线的不对称磁阻。 每个转子极具有相同的宽度，并且转子极可操作以在所有转子位置的一个旋转方向上产生优先转矩。 这种优先转矩产生在电磁通量的影响下发生，该电磁通由具有与转子极大致相同宽度的多个凸极定子极提供。

公开(公告)号：US20050154545A1

公开(公告)日：2005-07-14

申请号：US10999646

申请日：2004-11-24

Applicant: Krishnan Ramu ,  Ajit Bhanot

Inventor： Krishnan Ramu ,  Ajit Bhanot

IPC: G01R25/00 ,  H02P25/08

CPC classification number: H02P25/089

Abstract: A method for identifying an operational phase of a motor may include obtaining a first value of a signal that is indicative of the operational phase of the motor and obtaining a second value of the signal after a period of time has expired. The method further includes identifying a first operational phase of the motor if the second value exceeds the first value by a non-negative first threshold value. A second operational phase of the motor is identified if the second value does not exceed the first value by the first threshold value. The first and second operational phases may correspond to relative positions of a motor's rotor and stator, such that periods of energization may be identified for producing motoring or regenerative torque.

Abstract translation: 用于识别电动机的操作阶段的方法可以包括获得指示电动机的操作阶段的信号的第一值，并且在一段时间到期之后获得信号的第二值。 该方法还包括如果第二值超过非负第一阈值的第一值，则识别电动机的第一操作阶段。 如果第二值不超过第一值第一阈值，则识别电动机的第二操作阶段。 第一和第二操作阶段可以对应于电动机的转子和定子的相对位置，使得可以识别通电周期以产生电动或再生转矩。

公开(公告)号：US08878467B2

公开(公告)日：2014-11-04

申请号：US13959334

申请日：2013-08-05

Applicant: Krishnan Ramu

Inventor： Krishnan Ramu

IPC: H02P25/08 ,  H02K1/14 ,  H02K3/18 ,  H02P6/14

CPC classification number: H02P6/14 ,  H02K1/14 ,  H02K3/18 ,  H02K2213/03

Abstract: Drive circuits that provide power factor correction and input current waveform shaping for controlling the speed and torque in a switched reluctance machine (SRM). The machine's phase windings are split into two segments, one of which is used for active power factor correction, input ac current waveform shaping and partial torque generation and the other of which is used for torque generation.

Abstract translation: 提供功率因数校正和输入电流波形整形的驱动电路，用于控制开关磁阻电机（SRM）中的速度和转矩。 机器相绕组分为两段，其中一段用于有功功率因数校正，输入交流电流波形整形和部分转矩生成，另一段用于转矩产生。