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    CURRENT REGULATOR AND CURRENT CONTROL METHOD AND SYSTEM FOR AC MOTORS
    41.
    发明申请
    CURRENT REGULATOR AND CURRENT CONTROL METHOD AND SYSTEM FOR AC MOTORS 有权
    交流电机的电流调节器和电流控制方法及系统

    公开(公告)号：US20090230900A1

    公开(公告)日：2009-09-17

    申请号：US12048071

    申请日：2008-03-13

    Applicant: BONHO BAE ,  NITINKUMAR R. PATEL ,  STEVEN E. SCHULZ ,  JAMES M. NAGASHIMA ,  JUNG SIK YIM ,  SEUNG KI SUL

    Inventor： BONHO BAE ,  NITINKUMAR R. PATEL ,  STEVEN E. SCHULZ ,  JAMES M. NAGASHIMA ,  JUNG SIK YIM ,  SEUNG KI SUL

    IPC: H02P21/14

    CPC classification number: H02P21/22

    Abstract: Methods and systems are provided for controlling an AC motor via an inverter. The method includes determining a delay-compensated offset based on a synchronous frame current, producing a current error based on a synchronous frame current and a commanded current, producing a voltage error based on an anti-windup offset and the current error, producing a commanded voltage based on the delay-compensated offset and the voltage error, and providing the inverter with the commanded voltage.

    Abstract translation: 提供了用于通过逆变器控制AC电动机的方法和系统。 该方法包括基于同步帧电流确定延迟补偿的偏移，基于同步帧电流和指令电流产生电流误差，产生基于抗融场偏移和当前误差的电压误差，产生命令 基于延迟补偿偏移和电压误差的电压，并向逆变器提供指令电压。

    OIL PUMP SYSTEMS AND METHODS FOR PREVENTING TORQUE OVERLOAD IN MOTORS OF OIL PUMP SYSTEMS
    42.
    发明申请
    OIL PUMP SYSTEMS AND METHODS FOR PREVENTING TORQUE OVERLOAD IN MOTORS OF OIL PUMP SYSTEMS 有权
    油泵系统及油泵系统电机扭矩过载油泵系统及方法

    公开(公告)号：US20080303477A1

    公开(公告)日：2008-12-11

    申请号：US11759274

    申请日：2007-06-07

    Applicant: Nitinkumar R. Patel

    Inventor： Nitinkumar R. Patel

    IPC: H02P27/04

    CPC classification number: F04C23/02 ,  F04B17/03 ,  F04B49/06 ,  F04B2203/0207 ,  F04C14/08 ,  F04C2240/808 ,  F04C2240/81 ,  F04C2270/03 ,  F04C2270/70 ,  F04C2270/80 ,  H02P23/14 ,  H02P29/032

    Abstract: Methods and apparatus are provided for preventing a voltage overload condition of an alternating current (“AC”) motor electrically coupled to an inverter. In an embodiment, the system includes an oil pump, a motor in communication with the oil pump, an inverter module in electrical communication with the motor, the inverter module configured to generate a speed command, and a controller module. The controller module is in communication with the inverter module and the motor and is configured to determine an error, based, in part, on an estimated torque value of the motor and a predetermined maximum available torque value, to convert the error into a first value, to limit the first value between a negative value and zero, and to add the first value to the speed command from the inverter to thereby generate a final speed command for the motor.

    Abstract translation: 提供了用于防止电耦合到逆变器的交流（“AC”）电动机的电压过载状态的方法和装置。 在一个实施例中，系统包括油泵，与油泵连通的电动机，与电动机电连通的逆变器模块，被配置为产生速度指令的逆变器模块和控制器模块。 所述控制器模块与所述逆变器模块和所述电动机通信，并且被配置为基于部分地基于所述电动机的估计转矩值和预定的最大可用转矩值来确定误差，以将所述误差转换为第一值 ，将负值和零之间的第一值进行限制，并将来自逆变器的第一值加到速度指令，从而生成电动机的最终速度指令。

    Current regulation for a field weakening motor control system and method
    44.
    发明授权
    Current regulation for a field weakening motor control system and method 有权
    减弱电机控制系统和方法的电流调节

    公开(公告)号：US07015667B2

    公开(公告)日：2006-03-21

    申请号：US10808082

    申请日：2004-03-24

    Applicant: Nitinkumar R. Patel ,  Steven E. Schulz

    Inventor： Nitinkumar R. Patel ,  Steven E. Schulz

    IPC: H02P7/00

    CPC classification number: H02P21/08

    Abstract: A control system and method for an electric machine includes a first calculation module that receives a modified torque command and a calculated stator flux command and that generates first and second current commands and first and second voltage commands. A voltage magnitude calculation module generates a voltage magnitude based the first and second voltage commands. A reference voltage calculator module generates a reference voltage based on a DC link voltage, an angular stator velocity and the first and second current commands. A flux weakening module generates the calculated flux command based on the angular stator velocity, the reference voltage and the voltage magnitude.

    Abstract translation: 一种用于电机的控制系统和方法包括：第一计算模块，其接收修改的转矩指令和计算的定子磁通指令，并产生第一和第二电流指令以及第一和第二电压指令。 电压幅度计算模块基于第一和第二电压命令产生电压幅度。 参考电压计算器模块基于DC链路电压，角定子速度和第一和第二电流命令产生参考电压。 磁通弱化模块基于角定子速度，参考电压和电压幅度产生计算的磁通指令。

    Flux observer in a sensorless controller for permanent magnet motors
    45.
    发明授权
    Flux observer in a sensorless controller for permanent magnet motors 有权
    永磁电机无传感器控制器中的磁通观察器

    公开(公告)号：US06841969B1

    公开(公告)日：2005-01-11

    申请号：US10669918

    申请日：2003-09-24

    Applicant: Steven E. Schulz ,  Nitinkumar R. Patel

    Inventor： Steven E. Schulz ,  Nitinkumar R. Patel

    IPC: H02P21/14 ,  H02P6/18

    CPC classification number: H02P21/13 ,  H02P21/24 ,  H02P2207/05

    Abstract: A control system includes a field oriented controller that receives a torque command and that generates phase voltages for an electric machine. A first transformation module receives stator terminal currents and generates d-axis and q-axis stationary frame currents. An open loop flux observer receives d-axis and q-axis stationary frame voltage commands and the d and q-axis stationary frame currents. The open loop flux observer includes a vector cross product calculator that generates an error signal that is proportional to an angular difference between an estimated stator flux and a computed stator flux and a proportional integral controller that generates an estimated rotor angular position based on the error signal. A second transformation module receives the d-axis and q-axis stationary frame currents and the estimated rotor angular position and generates d-axis and q-axis synchronous reference frame feedback currents that are output to the field oriented controller.

    Abstract translation: 控制系统包括磁场定向控制器，其接收转矩指令并产生电机的相电压。 第一变换模块接收定子端电流并产生d轴和q轴静止的电流。 开环通量观测器接收d轴和q轴静止电压指令以及d轴和q轴静止电流。 开环通量观察器包括矢量交叉乘积计算器，其生成与估计的定子通量和计算出的定子通量之间的角度差成比例的误差信号，以及基于误差信号产生估计的转子角位置的比例积分控制器 。 第二变换模块接收d轴和q轴静止帧电流和估计的转子角位置，并产生输出到磁场定向控制器的d轴和q轴同步参考帧反馈电流。

    Method and system for sensorless control of an electric motor
    46.
    发明授权
    Method and system for sensorless control of an electric motor 有权
    电动机无传感器控制的方法和系统

    公开(公告)号：US08340848B2

    公开(公告)日：2012-12-25

    申请号：US11947501

    申请日：2007-11-29

    Applicant: Yo Chan Son ,  Nitinkumar R. Patel ,  Steven E. Schulz

    Inventor： Yo Chan Son ,  Nitinkumar R. Patel ,  Steven E. Schulz

    IPC: B60L9/00

    CPC classification number: H02P21/13 ,  H02P21/141 ,  H02P21/24

    Abstract: Methods and systems for controlling an electric motor are provided. A signal comprising at least first and second cycles is provided to the electric motor. A first flux value for the electric motor associated with the first cycle of the signal is calculated. A second flux value for the electric motor associated with the second cycle of the signal is calculated based on the first flux value.

    Abstract translation: 提供了用于控制电动机的方法和系统。 包括至少第一和第二循环的信号被提供给电动机。 计算与信号的第一周期相关的电动机的第一通量值。 基于第一通量值计算与信号的第二周期相关联的电动机的第二通量值。

    METHOD AND SYSTEM FOR INITIATING OPERATION OF AN ELECTRIC MOTOR
    48.
    发明申请
    METHOD AND SYSTEM FOR INITIATING OPERATION OF AN ELECTRIC MOTOR 有权
    电动机起动方法及系统

    公开(公告)号：US20110095713A1

    公开(公告)日：2011-04-28

    申请号：US12606839

    申请日：2009-10-27

    Applicant: YO CHAN SON ,  JIHOON JANG ,  BRIAN A. WELCHKO ,  NITINKUMAR R. PATEL ,  STEVEN E. SCHULZ

    Inventor： YO CHAN SON ,  JIHOON JANG ,  BRIAN A. WELCHKO ,  NITINKUMAR R. PATEL ,  STEVEN E. SCHULZ

    IPC: H02P6/20 ,  B60W20/00

    CPC classification number: H02P6/20

    Abstract: Methods and systems for controlling an electric motor are provided. The motor includes a plurality of windings. Each winding is coupled to a respective set of first and second switches. The first switch of each set of switches is simultaneously activated. Current flow through the plurality of windings is measured while the first switch of each set of switches is activated. The electric motor is controlled according to a first motor control method if the measured current is below a predetermined threshold. The electric motor is controlled according to a second motor control method if the measured current is above the predetermined threshold.

    Abstract translation: 提供了用于控制电动机的方法和系统。 马达包括多个绕组。 每个绕组耦合到相应的一组第一和第二开关。 每组开关的第一个开关同时被激活。 当每组开关的第一开关被激活时，测量通过多个绕组的电流。 如果测量电流低于预定阈值，则根据第一电动机控制方法来控制电动机。 如果测量的电流高于预定阈值，则根据第二电动机控制方法来控制电动机。

    Method and system for motor control with delay compensation
    50.
    发明授权
    Method and system for motor control with delay compensation 有权
    延时补偿电机控制方法及系统

    公开(公告)号：US07679309B2

    公开(公告)日：2010-03-16

    申请号：US11743718

    申请日：2007-05-03

    Applicant: Steven E. Schulz ,  Nitinkumar R. Patel ,  Bonho Bae ,  Stephen T. West

    Inventor： Steven E. Schulz ,  Nitinkumar R. Patel ,  Bonho Bae ,  Stephen T. West

    IPC: H02P23/00

    CPC classification number: H02P23/0004

    Abstract: Methods and systems are provided for controlling an electric machine via an inverter while compensating for one or more hardware delays. The method includes receiving a control signal, producing a first sampling signal based on the control signal, and adjusting the sampling signal to compensate for a first delay of the one or more hardware delays. The inverter is operable to produce a voltage signal based on the control signal, and the electric machine is operable to produce a current based on the voltage signal. A sampling of the current is performed based on the first sampling signal.

    Abstract translation: 提供了用于通过反相器控制电机的方法和系统，同时补偿一个或多个硬件延迟。 该方法包括接收控制信号，基于控制信号产生第一采样信号，以及调整采样信号以补偿一个或多个硬件延迟的第一延迟。 逆变器可操作以基于控制信号产生电压信号，并且电机可操作以基于电压信号产生电流。 基于第一采样信号执行电流的采样。

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