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1. 发明申请

US20050110450A1 Decoupling a harmonic signal from a signal path 失效
标题翻译：从信号路径去耦合一个谐波信号
公开(公告)号：US20050110450A1
公开(公告)日：2005-05-26
申请号：US10720626
申请日：2003-11-24
申请人： Constantin Stancu , Silva Hiti , Steven Schulz , Nitinkumar Patel
发明人： Constantin Stancu , Silva Hiti , Steven Schulz , Nitinkumar Patel
IPC分类号： G05B11/36 , H02P6/18 , H02P21/14 , H04B20060101
CPC分类号： H02P6/185 , H02P6/183 , H02P21/18 , H02P2203/11 , H02P2207/01
摘要： A method for decoupling a harmonic signal from an input signal wherein the harmonic signal is harmonic relative to a signal other than the input signal. An angular position of the other signal is multiplied by a value representing the harmonic to obtain an angular position multiple. A harmonic decoupling block uses the angular position multiple to obtain correction signals representing the harmonic signal, and subtracts the correction signals from the input current to decouple the harmonic signal from the input signal. This method is useful for decoupling unwanted harmonics from currents into which high-frequency signals have been injected for control of electric motors.
摘要翻译：一种用于将谐波信号与输入信号去耦的方法，其中谐波信号是相对于输入信号以外的信号的谐波。将另一信号的角位置乘以表示谐波的值，以获得角位置倍数。谐波去耦块使用角位置倍数来获得表示谐波信号的校正信号，并从输入电流中减去校正信号，以将谐波信号与输入信号去耦。该方法对于将不想要的谐波与已注入高频信号的电流去耦以控制电动机是有用的。

2. 发明申请

US20080030155A1 GEARLESS WHEEL MOTOR DRIVE SYSTEM 有权
标题翻译：无齿轮电机驱动系统
公开(公告)号：US20080030155A1
公开(公告)日：2008-02-07
申请号：US11845469
申请日：2007-08-27
申请人： Nitinkumar Patel , Silva Hiti , Khwaja Rahman
发明人： Nitinkumar Patel , Silva Hiti , Khwaja Rahman
IPC分类号： H02P21/00
CPC分类号： 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
摘要： Methods and apparatus are provided for an electric vehicle embodying an axial flux traction motor directly coupled to a wheel thereof. The traction motor comprises 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.
摘要翻译：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。牵引电动机包括具有用于产生磁场的线圈的定子，与定子磁耦合并机械地连接到输出轴的环形转子。交替极性的永磁体安装在环形转子上。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。

3. 发明申请

US20050035676A1 Gearless wheel motor drive system 有权
标题翻译：无齿轮电机驱动系统
公开(公告)号：US20050035676A1
公开(公告)日：2005-02-17
申请号：US10903929
申请日：2004-07-29
申请人： Khwaja Rahman , Silva Hiti , Nitinkumar Patel , Terence Ward , James Nagashima , Fabio Crescimbini , Federico Caricchi
发明人： Khwaja Rahman , Silva Hiti , Nitinkumar Patel , Terence Ward , James Nagashima , Fabio Crescimbini , Federico Caricchi
IPC分类号： B60K6/26 , H02K1/18 , H02K1/27 , H02K3/46 , H02K7/14 , H02K9/22 , H02K21/24 , H02K29/03 , H02K7/06 , B60K1/00
CPC分类号： 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
摘要： Methods and apparatus are provided for an electric vehicle embodying an axial flux traction motor directly coupled to a wheel thereof. The traction motor comprises 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.
摘要翻译：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。牵引电动机包括具有用于产生磁场的线圈的定子，与定子磁耦合并机械地连接到输出轴的环形转子。交替极性的永磁体安装在环形转子上。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。

4. 发明申请

US20050073272A1 Method and system for managing processor execution time utilizing variable frequency switching 有权
公开(公告)号：US20050073272A1
公开(公告)日：2005-04-07
申请号：US10676529
申请日：2003-10-01
申请人： James Nagashima , Thomas O'Meara , Nitinkumar Patel , Steven Schulz
发明人： James Nagashima , Thomas O'Meara , Nitinkumar Patel , Steven Schulz
IPC分类号： H02P3/00 , H02P5/00 , H02P23/00
CPC分类号： H02P23/0004
摘要： The present invention includes a method for managing processor execution time in a motor controller. The method includes receiving motor speed data, comparing the received motor speed data to predetermined motor speed ranges, determining a motor speed range based on the comparison, and modulating an inverter switching frequency of the motor controller processor based on the motor speed range. The step of receiving motor speed data may include receiving machine terminal information, processing the received machine terminal information utilizing a sensorless control algorithm, and determining motor speed data based on the processed information. The step of modulating the inverter switching frequency may include determining a modified inverter switching frequency value based on the determined motor speed range and providing the modified inverter switching frequency value to a processor control algorithm. In one embodiment, the processor control algorithm modifies the inverter switching frequency based on the modified inverter switching frequency value.

5. 发明申请

US20060097688A1 Start-up and restart of interior permanent magnet machines 有权
标题翻译：启动和重新启动内置永磁机
公开(公告)号：US20060097688A1
公开(公告)日：2006-05-11
申请号：US10984269
申请日：2004-11-09
申请人： Nitinkumar Patel , Steven Schulz , Thomas O'Meara
发明人： Nitinkumar Patel , Steven Schulz , Thomas O'Meara
IPC分类号： H02P1/46
CPC分类号： H02P6/20 , F02N11/04 , F02N11/0859 , F02N2200/041 , H02P1/46 , H02P21/34
摘要： A method of starting a permanent magnet machine. A machine stator voltage in a stationary reference frame is sensed. An initial speed of a rotor of the machine is estimated based on the sensed voltage, and state variables of control algorithms are initialized based on the estimated initial speed. This method can provide smooth startup and/or restart at any speed.
摘要翻译：一种启动永磁机的方法。感测到静止参考系中的机器定子电压。基于感测到的电压来估计机器的转子的初始速度，并且基于估计的初始速度来初始化控制算法的状态变量。该方法可以以任何速度提供平稳的启动和/或重新启动。

6. 发明申请

US20060055363A1 FIELD WEAKENING MOTOR CONTROL SYSTEM AND METHOD 失效
标题翻译：现场弱电机控制系统及方法
公开(公告)号：US20060055363A1
公开(公告)日：2006-03-16
申请号：US10939553
申请日：2004-09-13
申请人： Nitinkumar Patel , Steven Schulz , Seung Sul , Bon-Ho Bae
发明人： Nitinkumar Patel , Steven Schulz , Seung Sul , Bon-Ho Bae
IPC分类号： H02P3/18
CPC分类号： H02P21/10 , H02P21/0089
摘要： A control system for an electric machine includes a flux weakening module, which includes a voltage magnitude calculator that receives d-axis and q-axis command voltages and that generates a voltage magnitude. An error circuit compares the voltage magnitude to a reference voltage and generates an error signal. A controller receives the error signal and generates a feedback flux correction signal. A limiter limits the feedback flux correction signal to a predetermined flux value and generates a limited feedback flux correction signal. A feedforward stator flux generating circuit generates a feedforward stator flux signal. A summing circuit sums the feedforward stator flux signal and the limited feedback flux correction signal to generate a final stator flux command.
摘要翻译：一种用于电机的控制系统包括磁通削弱模块，其包括接收d轴和q轴指令电压并产生电压幅度的电压幅度计算器。误差电路将电压幅度与参考电压进行比较，并产生误差信号。控制器接收误差信号并产生反馈磁通校正信号。限制器将反馈磁通校正信号限制在预定磁通值，并产生有限的反馈磁通校正信号。前馈定子通量产生电路产生前馈定子磁通信号。求和电路将前馈定子磁通信号和有限反馈磁通校正信号相加，以产生最终的定子通量指令。

7. 发明申请

US20060097702A1 Position-sensorless control of interior permanent magnet machines 有权
公开(公告)号：US20060097702A1
公开(公告)日：2006-05-11
申请号：US10984178
申请日：2004-11-09
申请人： James Nagashima , Khwaja Rahman , Nitinkumar Patel , Steven Schulz , Terence Ward , Stanley Fujii
发明人： James Nagashima , Khwaja Rahman , Nitinkumar Patel , Steven Schulz , Terence Ward , Stanley Fujii
IPC分类号： H02H7/06 , H02P9/00 , H02P11/00
CPC分类号： H02P21/04 , H02P21/0089 , H02P21/22 , H02P29/02
摘要： A method of controlling an IPM machine having a salient rotor. Stator terminal signals are measured and rotated to obtain synchronous reference frame current signals. A rotor position is estimated based on an impedance generated using the rotor and included in the current signals. The estimated rotor position is used to control the machine. An alternator-starter system in which this method is used can provide high cranking torque and generation power over a wide speed range while providing operational efficiency.

8. 发明申请

US20050212471A1 Current regulation for a field weakening motor control system and method 有权
标题翻译：减弱电机控制系统和方法的电流调节
公开(公告)号：US20050212471A1
公开(公告)日：2005-09-29
申请号：US10808082
申请日：2004-03-24
申请人： Nitinkumar Patel , Steven Schulz
发明人： Nitinkumar Patel , Steven Schulz
IPC分类号： H02P7/00 , H02P21/08
CPC分类号： H02P21/08
摘要： 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.
摘要翻译：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。

9. 发明申请

US20070132415A1 Method and apparatus for sensorless position control of a permanent magnet synchronous motor (PMSM) drive system 失效
标题翻译：永磁同步电机（PMSM）驱动系统的无传感器位置控制方法和装置
公开(公告)号：US20070132415A1
公开(公告)日：2007-06-14
申请号：US11300525
申请日：2005-12-14
申请人： Nitinkumar Patel , Bon-Ho Bae , James Nagashima
发明人： Nitinkumar Patel , Bon-Ho Bae , James Nagashima
IPC分类号： H02P7/00
CPC分类号： H02P21/24 , H02P25/03
摘要： 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.
摘要翻译：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。

10. 发明授权

US11043912B2 Sensorless position estimation for interior permanent magnet synchronous motor 有权
公开(公告)号：US11043912B2
公开(公告)日：2021-06-22
申请号：US16572764
申请日：2019-09-17
申请人： Daniel R Luedtke , Nitinkumar Patel , Mustafa Mohamadian , Lakshmi Narayanan Srivatchan
发明人： Daniel R Luedtke , Nitinkumar Patel , Mustafa Mohamadian , Lakshmi Narayanan Srivatchan
IPC分类号： H02P21/20 , H02P21/22 , H02P21/18 , H02P6/18
摘要： A sensorless position estimation and control system and method for a permanent magnet electric motor of a powertrain system of a vehicle involve determining a reference torque to be achieved by the electric motor based on a set of vehicle operating parameters, determining a reference current magnitude to achieve the determined reference torque using a lookup table, determining current commands for the electric motor based on the determined reference current magnitude and a fixed reference current angle, injecting a high frequency voltage into a voltage control loop for the electric motor and estimating, by the controller, a position of a rotor of the electric motor thereafter, and controlling a current provided to the electric motor based on the determined current commands and the estimated rotor position.

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