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。

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。

公开(公告)号：US07262536B2

公开(公告)日：2007-08-28

申请号：US10903929

申请日：2004-07-29

Applicant: Khwaja M. Rahman ,  Silva Hiti ,  Nitinkumar R. Patel ,  Terence G. Ward ,  James M. Nagashima ,  Fabio Crescimbini ,  Federico Caricchi

Inventor： Khwaja M. Rahman ,  Silva Hiti ,  Nitinkumar R. Patel ,  Terence G. Ward ,  James M. Nagashima ,  Fabio Crescimbini ,  Federico Caricchi

IPC: H02K21/12

CPC classification number: H02K1/2793 ,  B60K6/26 ,  B60K7/0007 ,  B60K2007/0038 ,  B60K2007/0092 ,  B60L1/02 ,  B60L3/003 ,  B60L3/0046 ,  B60L3/0061 ,  B60L7/14 ,  B60L11/1803 ,  B60L11/1881 ,  B60L15/025 ,  B60L15/06 ,  B60L15/08 ,  B60L15/20 ,  B60L15/2009 ,  B60L2210/40 ,  B60L2220/14 ,  B60L2220/16 ,  B60L2220/44 ,  B60L2220/50 ,  B60L2240/36 ,  B60L2240/421 ,  B60L2240/423 ,  B60L2240/425 ,  B60L2240/427 ,  B60L2240/429 ,  B60L2240/526 ,  B60L2240/527 ,  B60L2240/529 ,  B60L2240/547 ,  B60L2250/26 ,  B60L2270/145 ,  H02K7/14 ,  H02K21/24 ,  H02K29/03 ,  H02P21/06 ,  Y02T10/641 ,  Y02T10/643 ,  Y02T10/644 ,  Y02T10/7241 ,  Y02T10/7275 ,  Y02T90/34

Abstract: Methods and apparatus are provided for an electric vehicle embodying an axial flux traction motor directly coupled to a wheel thereof. The fraction motor includes a stator having coils for producing a magnetic field, an annular rotor magnetically coupled to the stator and mechanically to an output shaft Permanent magnets of alternating polarity are mounted on the annular rotor. Magnetic shunts bridge a portion of the stator slots above the coils. The magnets are arranged in groups with group-to-group spacing exceeding magnet-to-magnet spacing. Adjacent edges of the magnets diverge. The method comprises, looking up d- and q-axis currents to provide the requested torque and motor speed for the available DC voltage, combining at least one of the d- and q-axis currents with a field weakening correction term, converting the result from synchronous to stationary frame and operating an inverter therewith to provide current to the coils of the motor.

Abstract translation: 提供了一种实现轴向通量牵引电动机的电动车辆的方法和装置，其直接联接到其车轮。 分数马达包括具有用于产生磁场的线圈的定子，磁耦合到定子并机械地连接到输出轴的环形转子安装在环形转子上。 磁分路桥接线圈上方的定子槽的一部分。 磁体以组间距离超过磁体与磁体的间距分组排列。 磁体的相邻边缘发散。 该方法包括：查找d轴和q轴电流以为可用的直流电压提供所要求的转矩和电动机速度，将d轴和q轴电流中的至少一个与弱磁修正项组合，转换结果 从同步到静止的框架并且与其一起操作逆变器以向电动机的线圈提供电流。

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。

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。

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。

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。

公开(公告)号：US07659684B2

公开(公告)日：2010-02-09

申请号：US11738854

申请日：2007-04-23

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

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

IPC: G05B11/01

CPC classification number: B60L3/12 ,  H02P23/04 ,  H02P27/08 ,  Y02T10/642

Abstract: A method and system for operating a motor are provided. Power is provided to the motor through at least one switch operating at a first switching frequency. A pulse ratio of the motor is calculated based on the first switching frequency. The at least one switch is operated at a second switching frequency if the calculated pulse ratio is less than a first pulse ratio value and greater than a second pulse ratio value.

Abstract translation: 提供了一种用于操作电动机的方法和系统。 通过至少一个以第一开关频率工作的开关将电力提供给电动机。 基于第一开关频率计算电动机的脉冲比。 如果所计算的脉冲比小于第一脉冲比值且大于第二脉冲比值，则至少一个开关以第二开关频率工作。

公开(公告)号：US07576500B2

公开(公告)日：2009-08-18

申请号：US11756349

申请日：2007-05-31

Applicant: Nitinkumar R. Patel ,  Mohammad N. Anwar ,  Silva Hiti ,  Brian A Welchko ,  Steven E. Schulz ,  Lisa M. Talarico

Inventor： Nitinkumar R. Patel ,  Mohammad N. Anwar ,  Silva Hiti ,  Brian A Welchko ,  Steven E. Schulz ,  Lisa M. Talarico

IPC: H02P1/00

CPC classification number: H02P27/08 ,  B60L2270/142 ,  H02M1/14 ,  Y02T10/642

Abstract: Methods and systems for operating a motor coupled to an electrical bus in a vehicle are provided. Selected resonant frequencies of the electrical bus are determined. The selected resonant frequencies include a low resonant frequency and a high resonant frequency. Power is provided to the motor through at least one switch operating at a switching frequency. The switching frequency is controlled as a function of a rate of operation of the motor. The function is characterized by one of a first substantially linear portion having a first slope when the switching frequency is less than or equal to a selected switching frequency and a second substantially linear portion having a second slope if the switching frequency is greater than the selected frequency, the selected switching frequency being greater than the low resonant frequency and a substantially linear portion having a y-intercept being greater than the low resonant frequency.

Abstract translation: 提供了用于操作耦合到车辆中的电气总线的马达的方法和系统。 确定电气总线的选定谐振频率。 所选择的谐振频率包括低谐振频率和高谐振频率。 通过至少一个以开关频率工作的开关将电力提供给电动机。 开关频率根据电机的运行速度进行控制。 该功能的特征在于当开关频率小于或等于所选择的开关频率时具有第一斜率的第一基本线性部分中的一个以及具有第二斜率的第二基本线性部分，如果开关频率大于所选择的频率 ，所选择的开关频率大于低谐振频率，并且具有大于低谐振频率的y截距的基本线性部分。

公开(公告)号：US07525269B2

公开(公告)日：2009-04-28

申请号：US11300525

申请日：2005-12-14

Applicant: Nitinkumar R. Patel ,  Bon-Ho Bae ,  James M. Nagashima

Inventor： Nitinkumar R. Patel ,  Bon-Ho Bae ,  James M. Nagashima

IPC: H02P7/00

CPC classification number: H02P21/24 ,  H02P25/03

Abstract: Methods and apparatus are provided for generating zero-sequence voltages based on voltage commands and a motor output signal. At least one of the methods includes, but is not limited to, receiving a torque command and generating three-phase voltage commands based on the torque command. The method also includes, but is not limited to, generating a motor output responsive to the three-phase voltage commands and generating three-phase zero-sequence voltage samples based on the three-phase voltage commands and the motor output.

Abstract translation: 提供了基于电压指令和电机输出信号产生零序电压的方法和装置。 方法中的至少一个包括但不限于接收转矩指令并且基于转矩指令产生三相电压命令。 该方法还包括但不限于响应于三相电压命令产生电动机输出并且基于三相电压命令和电动机输出产生三相零序电压采样。