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51. 发明申请

US20080197800A1 REDUCTION OF SUBHARMONIC OSCILLATION AT HIGH FREQUENCY OPERATION OF A POWER INVERTER 有权
标题翻译：降低功率变换器高频运行时的次谐波振荡
公开(公告)号：US20080197800A1
公开(公告)日：2008-08-21
申请号：US11676527
申请日：2007-02-20
申请人： Bonho Bae , Nitinkumar R. Patel , Steven E. Schulz , Silva Hiti
发明人： Bonho Bae , Nitinkumar R. Patel , Steven E. Schulz , Silva Hiti
IPC分类号： H02P27/04
CPC分类号： B60L15/025 , B60L11/1803 , B60L15/20 , B60L2210/20 , B60L2220/14 , H02P21/04 , Y02T10/643 , Y02T10/7005 , Y02T10/725 , Y02T10/7275
摘要： A control architecture for an electrical inverter includes a synchronous frame current regulator and a stationary frame current regulator. The stationary frame current regulator receives input currents that represent filtered versions of stationary frame currents that correspond to the inverter output currents. The control architecture employs an adaptive filter module that filters the stationary frame currents to remove the fundamental motor frequency component (and its related harmonics), thus extracting any low frequency harmonic components. The stationary frame current regulator processes the low frequency components, while the synchronous frame current regulator processes the fundamental frequency component, resulting in suppression of low frequency oscillations in the inverter output.
摘要翻译：用于电力逆变器的控制架构包括同步电流调节器和静止电流调节器。静态框架电流调节器接收表示对应于逆变器输出电流的静态框电流的滤波版本的输入电流。控制架构采用自适应滤波器模块，对固定电流进行滤波，去除基波电机频率分量（及其相关谐波），从而提取任何低频谐波分量。静态电流调节器处理低频分量，而同步电流调节器处理基频分量，从而抑制逆变器输出中的低频振荡。

52. 发明授权

US07307401B2 Method and apparatus for PWM control of voltage source inverter 有权
公开(公告)号：US07307401B2
公开(公告)日：2007-12-11
申请号：US11376915
申请日：2006-03-16
申请人： Slobodan Gataric , Brian Welchko , Steven E. Schulz , Silva Hiti , Steve T. West
发明人： Slobodan Gataric , Brian Welchko , Steven E. Schulz , Silva Hiti , Steve T. West
IPC分类号： H02P23/00
CPC分类号： H02P27/12 , H02M7/5387 , H02M2007/53876
摘要： PWM methods and apparatus are provided for loss minimized control of AC motors taking into consideration inverter non-linear limitations. The method comprises providing a voltage to the AC motor based on a switching cycle, adding a duty cycle of a zero vector to each phase leg of the switching cycle when a duty cycle of a first phase leg of the switching cycle is less than a minimum duty cycle, and subtracting the duty cycle of the zero vector from each phase leg of the switching cycle when a second duty cycle of a second phase leg is greater than a maximum duty cycle. The minimum duty cycle and maximum duty cycle indicate distortion regions.

53. 发明授权

US07411801B2 Method and apparatus for controlling voltage linearity of voltage source inverters 有权
标题翻译：用于控制电压源逆变器的电压线性度的方法和装置
公开(公告)号：US07411801B2
公开(公告)日：2008-08-12
申请号：US11300249
申请日：2005-12-14
申请人： Brian Welchko , Steven E. Schulz , Silva Hiti
发明人： Brian Welchko , Steven E. Schulz , Silva Hiti
IPC分类号： H02M7/537
CPC分类号： H02M7/53871
摘要： Methods and apparatus are provided for modifying a pulse width modulation signal controlling a voltage source inverter. The method comprises the steps of determining a duty cycle of the signal, clipping the duty cycle when a modulation index is greater than a minimum modulation index and less than a maximum modulation index, clipping the duty cycle when the modulation index is greater than or equal to the maximum modulation index, and transmitting the duty cycle to the voltage source inverter. The minimum modulation index indicates a distortion range.
摘要翻译：提供了用于修改控制电压源逆变器的脉宽调制信号的方法和装置。该方法包括以下步骤：确定信号的占空比，当调制指数大于最小调制指数并小于最大调制指数时削减占空比，当调制指数大于或等于时限制占空比到最大调制指数，并将占空比传送到电压源逆变器。最小调制指数表示失真范围。

54. 发明授权

US07218071B1 Method and apparatus for increasing AC motor torque output at low frequency 有权
标题翻译：提供低频交流电机转矩输出的方法和装置
公开(公告)号：US07218071B1
公开(公告)日：2007-05-15
申请号：US11375429
申请日：2006-03-14
申请人： Brian Welchko , Steven E. Schulz , Silva Hiti
发明人： Brian Welchko , Steven E. Schulz , Silva Hiti
IPC分类号： H02P27/06
CPC分类号： H02P6/085 , H02P23/03 , H02P2209/07
摘要： Methods and apparatus are provided for controlling AC motor torque output. The method comprises the steps of producing a current based on a first comparison of a fundamental output frequency of the AC motor with a predetermined frequency and a second comparison of a magnitude of a commanded current with a predetermined DC current, and supplying the current to the AC motor.
摘要翻译：提供了用于控制交流电动机转矩输出的方法和装置。该方法包括以下步骤：基于交流电动机的基本输出频率与预定频率的第一比较以及指令电流的大小与预定直流电流的第二比较产生电流，并将电流提供给交流电机。

55. 发明授权

US08754603B2 Methods, systems and apparatus for reducing power loss in an electric motor drive system 有权
标题翻译：用于减少电动机驱动系统中的功率损耗的方法，系统和装置
公开(公告)号：US08754603B2
公开(公告)日：2014-06-17
申请号：US13183318
申请日：2011-07-14
申请人： Michael Arnett , Steven E. Schulz , Bon Ho Bae , Silva Hiti , Ronghui Li
发明人： Michael Arnett , Steven E. Schulz , Bon Ho Bae , Silva Hiti , Ronghui Li
IPC分类号： H02P7/00
CPC分类号： H02P3/18 , H02P21/0021 , H02P21/36
摘要： Methods, system and apparatus are provided for reducing power loss in an electric motor drive system that includes an electric machine and an inverter module. A controller determines whether a torque command (Tcmd) is less than a minimum torque threshold (Tmin) that is required to disable the inverter module, and if so, increments a counter and determines whether the torque command (Tcmd) remains less than the minimum torque threshold (Tmin). When the torque command (Tcmd) remains less than the minimum torque threshold (Tmin), the controller checks to determine whether a current count value (n) maintained at the counter is greater than a count threshold (nth), and if so, the controller can generate a disable signal to disable switching within the inverter module.
摘要翻译：提供了用于减少包括电机和逆变器模块的电动机驱动系统中的功率损耗的方法，系统和装置。控制器确定转矩指令（Tcmd）是否小于禁用变频器模块所需的最小转矩阈值（Tmin），如果是，则增加一个计数器，并确定转矩指令（Tcmd）是否保持小于最小值转矩阈值（Tmin）。当扭矩指令（Tcmd）保持小于最小扭矩阈值（Tmin）时，控制器检查以确定计数器上保持的当前计数值（n）是否大于计数阈值（nth），如果是，则控制器可以产生一个禁用信号，以禁用逆变器模块内的开关。

56. 发明授权

US08536818B2 Control of a traction power inverter module in a vehicle having an electric traction motor 有权
标题翻译：控制具有电力牵引电动机的车辆中的牵引电力逆变器模块
公开(公告)号：US08536818B2
公开(公告)日：2013-09-17
申请号：US13086532
申请日：2011-04-14
申请人： Steven E. Schulz , Mohammad N. Anwar , Michael J. Grimmer , Silva Hiti
发明人： Steven E. Schulz , Mohammad N. Anwar , Michael J. Grimmer , Silva Hiti
IPC分类号： G05B11/28
CPC分类号： H02P27/08 , B60L11/1803 , Y02T10/642 , Y02T10/7005
摘要： A method for controlling a traction power inverter module (TPIM) in a vehicle includes determining a commanded output torque of the motor using a controller. The method further includes controlling the TPIM and motor using a discontinuous pulse width modulated (DPWM) signal when the commanded output torque is less than a calibrated torque threshold. A continuous pulse width modulated (CPWM) signal is used when the commanded output torque is greater than the threshold. The method may include determining a direction of a change in the commanded output torque, and controlling the TPIM, via the controller, using the DPWM signal only when the commanded output torque drops below a predetermined hysteresis level. A vehicle includes a traction motor producing a motor torque for propelling the vehicle, an ESS, a TPIM, and a controller configured as noted above.
摘要翻译：用于控制车辆中的牵引力逆变器模块（TPIM）的方法包括使用控制器确定电动机的命令输出转矩。该方法还包括当指令的输出转矩小于校准转矩阈值时，使用不连续的脉宽调制（DPWM）信号来控制TPIM和电动机。当指令输出转矩大于阈值时，使用连续脉宽调制（CPWM）信号。该方法可以包括：仅当指令的输出转矩低于预定的滞后电平时，才通过控制器使用DPWM信号来确定所命令的输出转矩的改变的方向，并控制TPIM。车辆包括产生用于推进车辆的电动机扭矩的牵引电动机，ESS，TPIM和如上所述配置的控制器。

57. 发明授权

US08362732B2 Motor phase winding fault detection method and apparatus 有权
标题翻译：电机相绕组故障检测方法及装置
公开(公告)号：US08362732B2
公开(公告)日：2013-01-29
申请号：US12698221
申请日：2010-02-02
申请人： Mohammad N. Anwar , S. M. N. Hasan , Khwaja M. Rahman , Silva Hiti , Steven E. Schulz , Sean E. Gleason
发明人： Mohammad N. Anwar , S. M. N. Hasan , Khwaja M. Rahman , Silva Hiti , Steven E. Schulz , Sean E. Gleason
IPC分类号： G01R31/02
CPC分类号： G01R31/343
摘要： A method of detecting a phase winding fault in a multi-phase electric machine is executable via a motor controller, and includes measuring feedback signals of the machine, including each phase current, and generating reference phase voltages for each phase. The method includes calculating a predetermined voltage value using the feedback signals and reference phase voltages, and comparing the voltage value to a corresponding threshold to determine the fault. A control action is executed when the voltage value exceeds the corresponding threshold. The voltage value is one or more of: a ratio of a normalized negative sequence voltage to a modulation index, an RMS voltage for each phase, and total harmonic distortion of each phase current. An apparatus detects the fault, and includes a motor controller and an algorithm as set forth above. The apparatus may include a voltage inverter for generating a multi-phase alternating current output for powering the machine.
摘要翻译：检测多相电机中的相绕组故障的方法可通过马达控制器执行，并且包括测量机器的反馈信号，包括每个相电流，并产生每相的参考相电压。该方法包括使用反馈信号和参考相电压来计算预定电压值，并将电压值与相应的阈值进行比较以确定故障。当电压值超过相应的阈值时，执行控制动作。电压值是以下中的一个或多个：归一化负序电压与调制指数的比率，每相的RMS电压以及每个相电流的总谐波失真。一种装置检测故障，并包括如上所述的马达控制器和算法。该装置可以包括电压逆变器，用于产生用于为机器供电的多相交流输出。

58. 发明授权

US08358095B2 Method and system for testing electric motors 有权
标题翻译：电动机测试方法及系统
公开(公告)号：US08358095B2
公开(公告)日：2013-01-22
申请号：US12533762
申请日：2009-07-31
申请人： Peter J. Savagian , Steven E. Schulz , Silva Hiti
发明人： Peter J. Savagian , Steven E. Schulz , Silva Hiti
IPC分类号： G01R31/02 , H02H3/04 , H02K11/00
CPC分类号： G01R31/343
摘要： Method and systems for testing an electric motor are provided. A switching circuit coupled to the motor is operated in a first mode causing current to flow through the motor such that the motor is actuated with near zero torque. A magnitude of the current is repeatedly adjusted between first and second values. The current flow through the motor is monitored.
摘要翻译：提供了用于测试电动机的方法和系统。耦合到电动机的开关电路以第一模式操作，使得电流流过电动机，使得电动机以接近零的转矩被致动。在第一和第二值之间重复地调整电流的大小。监测通过电机的电流。

59. 发明申请

US20120112674A1 CONTROL OF A TRACTION POWER INVERTER MODULE IN A VEHICLE HAVING AN ELECTRIC TRACTION MOTOR 有权
标题翻译：具有电动牵引电机的车辆中的跟踪功率变换器模块的控制
公开(公告)号：US20120112674A1
公开(公告)日：2012-05-10
申请号：US13086532
申请日：2011-04-14
申请人： Steven E. Schulz , Mohammad N. Anwar , Michael J. Grimmer , Silva Hiti
发明人： Steven E. Schulz , Mohammad N. Anwar , Michael J. Grimmer , Silva Hiti
IPC分类号： H02P6/08
CPC分类号： H02P27/08 , B60L11/1803 , Y02T10/642 , Y02T10/7005
摘要： A method for controlling a traction power inverter module (TPIM) in a vehicle includes determining a commanded output torque of the motor using a controller. The method further includes controlling the TPIM and motor using a discontinuous pulse width modulated (DPWM) signal when the commanded output torque is less than a calibrated torque threshold. A continuous pulse width modulated (CPWM) signal is used when the commanded output torque is greater than the threshold. The method may include determining a direction of a change in the commanded output torque, and controlling the TPIM, via the controller, using the DPWM signal only when the commanded output torque drops below a predetermined hysteresis level. A vehicle includes a traction motor producing a motor torque for propelling the vehicle, an ESS, a TPIM, and a controller configured as noted above.
摘要翻译：用于控制车辆中的牵引力逆变器模块（TPIM）的方法包括使用控制器确定电动机的命令输出转矩。该方法还包括当指令的输出转矩小于校准转矩阈值时，使用不连续的脉宽调制（DPWM）信号来控制TPIM和电动机。当指令输出转矩大于阈值时，使用连续脉宽调制（CPWM）信号。该方法可以包括：仅当指令的输出转矩低于预定的滞后电平时，才通过控制器使用DPWM信号来确定所命令的输出转矩的变化方向，并控制TPIM。车辆包括产生用于推进车辆的电动机扭矩的牵引电动机，ESS，TPIM和如上所述配置的控制器。

60. 发明授权

US07768220B2 Harmonic torque ripple reduction at low motor speeds 有权
标题翻译：低电机转速下的谐波转矩脉动降低
公开(公告)号：US07768220B2
公开(公告)日：2010-08-03
申请号：US12108868
申请日：2008-04-24
申请人： Steven E. Schulz , Goro Tamai , Silva Hiti
发明人： Steven E. Schulz , Goro Tamai , Silva Hiti
IPC分类号： H02P6/10
CPC分类号： H02P29/50
摘要： Methods and systems are provided for reducing torque ripple in an electric motor. A method comprises receiving a torque command and determining a cancellation current command based on the torque command. The method further comprises generating a harmonic cancellation command based on the cancellation current command, wherein the harmonic cancellation command compensates for a phase shift and an attenuation introduced by a current regulated control module coupled to an inverter coupled to the electric motor. The method further comprises providing the harmonic cancellation command to the current regulated control module, wherein the current regulated control module is configured to control the inverter in response to the harmonic cancellation command and the torque command.
摘要翻译：提供了减少电动机转矩波动的方法和系统。一种方法包括：接收转矩指令并根据转矩指令确定取消电流指令。该方法还包括基于消除电流指令产生谐波消除命令，其中谐波消除指令补偿由耦合到与电动机耦合的逆变器的电流调节控制模块引入的相移和衰减。该方法还包括向当前调节控制模块提供谐波消除命令，其中当前调节控制模块被配置为响应于谐波消除指令和转矩指令来控制逆变器。

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