公开(公告)号：US06763622B2

公开(公告)日：2004-07-20

申请号：US10268507

申请日：2002-10-10

Applicant: Steven E. Schulz ,  Nitinkumar R. Patel

Inventor： Steven E. Schulz ,  Nitinkumar R. Patel

IPC: H02P146

CPC classification number: B60L11/18 ,  B60L11/1803 ,  B60L15/025 ,  H02P6/181 ,  H02P6/183 ,  H02P6/185 ,  H02P21/0089 ,  H02P21/18 ,  H02P21/26 ,  H02P2203/05 ,  H02P2203/11 ,  H02P2207/05 ,  Y02T10/643 ,  Y02T10/7005 ,  Y02T10/7258

Abstract: A control system for an electric motor including an inverter for providing power to the electric motor, a controller for controlling the inverter, a first motor speed control block in the controller injecting a high frequency signal into the electric motor to determine the speed and position of the electric motor, where the first motor speed control block includes a tuned moving average filter to determine the magnitude of high frequency current in the electric motor.

Abstract translation: 一种用于电动机的控制系统，包括用于向电动机提供电力的逆变器，用于控制逆变器的控制器，控制器中的第一电动机速度控制块，将高频信号注入电动机以确定速度和位置 电动机，其中第一电动机速度控制块包括调谐移动平均滤波器，以确定电动机中的高频电流的大小。

公开(公告)号：US06760669B2

公开(公告)日：2004-07-06

申请号：US09789217

申请日：2001-02-20

Applicant: Nitinkumar R. Patel ,  Thomas P. O'Meara

Inventor： Nitinkumar R. Patel ,  Thomas P. O'Meara

IPC: G01R1500

CPC classification number: G05B13/0275 ,  H02P6/28 ,  H02P6/34

Abstract: A method of reducing loss in an interior permanent magnet drive system is provided. A current input DC link power value is calculated. The current input DC link power value is then compared with a previous input DC link power value. A change in input DC link power value is determined from this comparison. A flux decrement value is calculated. The flux decrement value is based on the change in input DC link power value. A stator current value is generated. The stator current value is based on the flux decrement value. Finally, the stator flux current is reduced, based on the stator current value.

Abstract translation: 提供一种降低内部永磁体驱动系统的损耗的方法。 计算电流输入DC链路功率值。 然后将当前输入的DC链路功率值与先前的输入DC链路功率值进行比较。 从该比较确定输入DC链路功率值的变化。 计算通量减量值。 通量减量值基于输入直流母线功率值的变化。 产生定子电流值。 定子电流值基于磁通量减量值。 最后，基于定子电流值，定子磁通电流减小。

公开(公告)号：US08414270B2

公开(公告)日：2013-04-09

申请号：US12944800

申请日：2010-11-12

Applicant: Jy-Jen F. Sah ,  Ali K. Naqvi ,  Vincent Rawls ,  Nitinkumar R. Patel

Inventor： Jy-Jen F. Sah ,  Ali K. Naqvi ,  Vincent Rawls ,  Nitinkumar R. Patel

IPC: B62D11/02

CPC classification number: F04B49/06 ,  F04B17/03 ,  F04B2203/0207 ,  F04B2203/0209

Abstract: A fluid system includes a fluidic device, an electrically-actuated fluid pump having a pump motor, and a control system. The control system controls a speed of the pump using a commanded torque value, and calculates a feedforward torque term as a function of a set of operating values, including a desired fluid line pressure. The control system determines the speed control torque term using pump speed error, and adds the feedforward torque term to the speed control torque term to calculate the commanded torque value. The speed control torque term may be determined using an integral term of a proportional integral derivative (PID) portion of the control system. A method for controlling pump speed includes calculating the feedforward torque term, determining the speed control torque term using a pump speed error, and adding the feedforward torque term to the speed control torque term to calculate the commanded torque value.

Abstract translation: 流体系统包括流体装置，具有泵电动机的电动致动流体泵和控制系统。 控制系统使用指令的扭矩值来控制泵的速度，并且计算作为包括所需流体管线压力的一组操作值的函数的前馈扭矩项。 控制系统使用泵速误差确定速度控制转矩项，并将前馈转矩项加到速度控制转矩项以计算指令的转矩值。 可以使用控制系统的比例积分微分（PID）部分的积分项来确定速度控制转矩项。 一种用于控制泵速的方法包括计算前馈转矩项，使用泵速误差确定速度控制转矩项，并将前馈转矩项加到速度控制转矩项以计算指令的转矩值。

公开(公告)号：US08269445B2

公开(公告)日：2012-09-18

申请号：US12582534

申请日：2009-10-20

Applicant: Nitinkumar R. Patel ,  Peter J. Savagian ,  Yo Chan Son ,  Rostam Dehmoobed Nasrabadi

Inventor： Nitinkumar R. Patel ,  Peter J. Savagian ,  Yo Chan Son ,  Rostam Dehmoobed Nasrabadi

IPC: H02K29/12

CPC classification number: H02P21/04 ,  B60L3/0038 ,  H02P21/24 ,  H02P29/032 ,  Y02T10/643

Abstract: Methods and apparatus are provided for a limp home operational mode for an electric motor system. The method includes determining whether a resolver has failed. When the resolver has not failed, operation of the electric motor system uses resolver signals. When the resolver fails, operation of the electric motor system uses sensorless rotor position and rotor speed signals.

Abstract translation: 提供了用于电动机系统的跛行家庭操作模式的方法和装置。 该方法包括确定解析器是否失败。 当解算器没有出现故障时，电机系统的运行使用分解器信号。 当解算器出现故障时，电动机系统的运行使用无传感器转子位置和转子速度信号。

公开(公告)号：US20120121438A1

公开(公告)日：2012-05-17

申请号：US12944800

申请日：2010-11-12

Applicant: Jy-Jen F. Sah ,  Ali K. Naqvi ,  Vincent Rawls ,  Nitinkumar R. Patel

Inventor： Jy-Jen F. Sah ,  Ali K. Naqvi ,  Vincent Rawls ,  Nitinkumar R. Patel

IPC: G05D7/06 ,  F04B49/00

CPC classification number: F04B49/06 ,  F04B17/03 ,  F04B2203/0207 ,  F04B2203/0209

Abstract: A fluid system includes a fluidic device, an electrically-actuated fluid pump having a pump motor, and a control system. The control system controls a speed of the pump using a commanded torque value, and calculates a feedforward torque term as a function of a set of operating values, including a desired fluid line pressure. The control system determines the speed control torque term using pump speed error, and adds the feedforward torque term to the speed control torque term to calculate the commanded torque value. The speed control torque term may be determined using an integral term of a proportional integral derivative (PID) portion of the control system. A method for controlling pump speed includes calculating the feedforward torque term, determining the speed control torque term using a pump speed error, and adding the feedforward torque term to the speed control torque term to calculate the commanded torque value.

Abstract translation: 流体系统包括流体装置，具有泵电动机的电动致动流体泵和控制系统。 控制系统使用指令的扭矩值来控制泵的速度，并且计算作为包括所需流体管线压力的一组操作值的函数的前馈扭矩项。 控制系统使用泵速度误差确定速度控制转矩项，并且将前馈转矩项加到速度控制转矩项以计算指令的转矩值。 可以使用控制系统的比例积分微分（PID）部分的积分项来确定速度控制转矩项。 一种用于控制泵速的方法包括计算前馈转矩项，使用泵速误差确定速度控制转矩项，并将前馈转矩项加到速度控制转矩项以计算指令的转矩值。

公开(公告)号：US08174222B2

公开(公告)日：2012-05-08

申请号：US12577516

申请日：2009-10-12

Applicant: Nitinkumar R. Patel ,  Yo Chan Son

Inventor： Nitinkumar R. Patel ,  Yo Chan Son

IPC: H02P6/00 ,  H02P21/00 ,  H02P7/00 ,  H02P23/00 ,  H02P27/04 ,  G05B11/28 ,  B60K1/02 ,  F16H59/00 ,  F04C18/00

CPC classification number: H02P6/18 ,  B60K1/02 ,  B60L1/003 ,  B60L2200/26 ,  F04C14/08 ,  F04C18/00 ,  F04C2210/14 ,  F04C2270/0525 ,  G05B11/28 ,  H02P6/085 ,  H02P21/00 ,  H02P29/60 ,  Y02T10/643 ,  Y10T477/23 ,  Y10T477/653

Abstract: Methods, system and apparatus are provided for sensorless control of a vector controlled motor drive system that includes an electric motor used to drive an auxiliary oil pump.

Abstract translation: 提供了用于无矢量控制矢量控制电机驱动系统的方法，系统和装置，其包括用于驱动辅助油泵的电动机。

公开(公告)号：US20110213518A1

公开(公告)日：2011-09-01

申请号：US12715081

申请日：2010-03-01

Applicant: BRIAN A. WELCHKO ,  NITINKUMAR R. PATEL ,  LEAH DUNBAR ,  WILLIAM R. CAWTHORNE ,  STEVEN E. SCHULZ

Inventor： BRIAN A. WELCHKO ,  NITINKUMAR R. PATEL ,  LEAH DUNBAR ,  WILLIAM R. CAWTHORNE ,  STEVEN E. SCHULZ

IPC: B60L11/00 ,  H02P7/285

CPC classification number: B60L15/20 ,  H02P29/032 ,  H02P29/60 ,  Y02T10/645 ,  Y02T10/7275 ,  Y10T477/23

Abstract: A method for operating an electric motor is provided. The method includes receiving a torque request; determining long term torque capabilities and short term torque capabilities of the electric motor; generating a torque command based on the torque request and at least one of the long term torque capabilities or the short term torque capabilities; and controlling the electric motor in accordance with the torque command.

Abstract translation: 提供了一种用于操作电动机的方法。 该方法包括接收扭矩请求; 确定电动机的长期扭矩能力和短期扭矩能力; 基于所述转矩请求和所述长期扭矩能力或短期扭矩能力中的至少一个产生转矩指令; 并根据转矩指令控制电动机。

公开(公告)号：US20110050141A1

公开(公告)日：2011-03-03

申请号：US12568002

申请日：2009-09-28

Applicant: CHIA-CHOU YEH ,  NITINKUMAR R. PATEL ,  YO CHAN SON ,  STEVEN E. SCHULZ

Inventor： CHIA-CHOU YEH ,  NITINKUMAR R. PATEL ,  YO CHAN SON ,  STEVEN E. SCHULZ

IPC: H02P7/00

CPC classification number: H02P6/08 ,  G01R31/343 ,  H02P29/664

Abstract: A temperature estimation controller and methods are provided for estimating stator winding temperature over a full range of motor operating speeds. In one implementation, the angular velocity of a motor is determined along with a total power loss for each phase of said motor. The total power loss in each phase comprises stator winding power loss and a core power loss. Stator winding temperatures for each phase of motor can then estimated based on the total power loss in that phase, and a combined thermal impedance for that phase. The combined thermal impedance comprises a first thermal impedance between the stator winding and the stator core, and a second thermal impedance between the stator core and the motor coolant.

Abstract translation: 提供了一种温度估计控制器和方法，用于在整个电机运行速度范围内估计定子绕组温度。 在一个实施方式中，确定电动机的角速度以及所述电动机的每相的总功率损耗。 每相中的总功率损耗包括定子绕组功率损耗和铁芯功率损耗。 然后可以根据该阶段的总功率损耗和该阶段的组合热阻抗来估计电机各相的定子绕组温度。 组合的热阻抗包括定子绕组和定子铁心之间的第一热阻抗，以及定子铁芯和电动机冷却剂之间的第二热阻抗。

公开(公告)号：US20110012544A1

公开(公告)日：2011-01-20

申请号：US12503591

申请日：2009-07-15

Applicant: STEVEN E. SCHULZ ,  YO CHAN SON ,  NITINKUMAR R. PATEL

Inventor： STEVEN E. SCHULZ ,  YO CHAN SON ,  NITINKUMAR R. PATEL

IPC: H02P21/04 ,  H02P6/18

CPC classification number: H02P6/182 ,  B60L15/025 ,  B60L15/08 ,  B60L2200/26 ,  B60L2260/44 ,  H02P21/04 ,  H02P21/18 ,  H02P21/24 ,  H02P27/08 ,  Y02T10/643

Abstract: Methods, system and apparatus are provided for low speed sensorless rotor angular position estimation that implements reduced switching loss PWM waveforms.

Abstract translation: 提供了用于实现降低的开关损耗PWM波形的低速无传感器转子角位置估计的方法，系统和装置。

公开(公告)号：US07595600B2

公开(公告)日：2009-09-29

申请号：US11759266

申请日：2007-06-07

Applicant: Nitinkumar R. Patel ,  Brian A Welchko ,  Bonho Bae ,  Steven E. Schulz

Inventor： Nitinkumar R. Patel ,  Brian A Welchko ,  Bonho Bae ,  Steven E. Schulz

IPC: H02P7/00

CPC classification number: H02P21/141 ,  H02P21/20

Abstract: Methods and systems are provided for controlling permanent magnet machines. The method includes determining a maximum torque of the PM machine based on an error between a commanded d-axis flux and an estimated d-axis flux of the PM machine, and adjusting a torque command based on the maximum torque. The error associated with a variation between a current temperature and a nominal temperature of the PM machine.

Abstract translation: 提供用于控制永磁机的方法和系统。 该方法包括基于指令的d轴磁通与PM机的估计d轴磁通之间的误差来确定PM机的最大转矩，以及基于最大转矩来调整转矩指令。 与PM机的当前温度和标称温度之间的变化相关的误差。