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91. 发明授权

US07952308B2 Method and apparatus for torque ripple reduction 有权
标题翻译：扭矩波动减小的方法和装置
公开(公告)号：US07952308B2
公开(公告)日：2011-05-31
申请号：US12098287
申请日：2008-04-04
申请人： Steven E. Schulz , John P. Miller , Khwaja M. Rahman , Soo-Yeol Lee
发明人： Steven E. Schulz , John P. Miller , Khwaja M. Rahman , Soo-Yeol Lee
IPC分类号： H02K29/06 , H02P6/10
CPC分类号： H02P21/06 , H02P6/10 , H02P27/08
摘要： Methods and apparatus are provided for reducing torque ripple in a permanent magnet motor system comprising a permanent magnet motor coupled to an inverter. The method comprises the steps of receiving a torque command, generating a torque ripple reduction signal in response to the torque command, modifying operational control signals in response to the torque ripple reduction signal to generate reduced ripple operational control signals, and providing the reduced ripple operational control signals to the inverter for control of the permanent magnet motor.
摘要翻译：提供了用于减少永磁电动机系统中的扭矩波动的方法和装置，其包括耦合到逆变器的永磁电动机。该方法包括以下步骤：接收转矩指令，响应于转矩指令产生转矩脉动降低信号，响应于转矩脉动降低信号修改运行控制信号以产生减小的纹波运算控制信号，并提供降低的纹波运算控制信号到变频器以控制永磁电动机。

92. 发明申请

US20110089883A1 MOTOR PHASE WINDING FAULT DETECTION METHOD AND APPARATUS 审中-公开
标题翻译：电机相绕组故障检测方法及装置
公开(公告)号：US20110089883A1
公开(公告)日：2011-04-21
申请号：US12582733
申请日：2009-10-21
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： G01R31/06
CPC分类号： G01R31/343 , G01R31/346
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 zero 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：归一化零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。

93. 发明授权

US07880416B2 Low speed synchronous motor drive operation 有权
标题翻译：低速同步电机驱动运行
公开(公告)号：US07880416B2
公开(公告)日：2011-02-01
申请号：US11856504
申请日：2007-09-17
申请人： Steven E. Schulz , Goro Tamai , Scott Thompson
发明人： Steven E. Schulz , Goro Tamai , Scott Thompson
IPC分类号： H02P6/08
CPC分类号： H02P6/08 , H02P23/03 , H02P2209/07
摘要： Methods and apparatus are provided for providing a torque boost in an electric motor system at low speeds. The electric motor system comprises an alternating current (AC) synchronous electric motor, an inverter and a controller. The inverter is coupled to the AC synchronous electric motor and provides electric control therefore. The controller is coupled to the inverter and provides operational control signals thereto for operation of the electric motor. The controller includes a torque command gain block which modifies a torque command to generate a boosted torque signal in response to a detected speed of the electric motor, the torque command modified to define the boosted torque signal defined in accordance with a torque dependent scaling factor calculated in response to the torque command.
摘要翻译：提供了用于在电动机系统中以低速提供转矩提升的方法和装置。电动机系统包括交流（AC）同步电动机，逆变器和控制器。逆变器耦合到交流同步电动机，因此提供电力控制。控制器耦合到逆变器，并提供用于电动机的操作的操作控制信号。所述控制器包括转矩指令增益块，所述转矩指令增益块根据所述电动机的检测速度修正转矩指令以产生升压转矩信号，所述转矩指令被修改以限定根据所计算出的与转矩相关的标度因子所定义的升压转矩信号响应扭矩指令。

94. 发明授权

US07679310B2 Method and system for controlling pulse width modulation in a power inverter in electric drives 有权
标题翻译：电力变频器中脉宽调制控制方法及系统
公开(公告)号：US07679310B2
公开(公告)日：2010-03-16
申请号：US11923293
申请日：2007-10-24
申请人： Steven E. Schulz , Brian A. Welchko , Silva Hiti
发明人： Steven E. Schulz , Brian A. Welchko , Silva Hiti
IPC分类号： H02P23/00
CPC分类号： B60L15/08 , B60L11/1803 , B60L15/007 , B60L15/20 , B60L2210/42 , B60L2240/421 , B60L2240/423 , H02P27/08 , Y02T10/644 , Y02T10/645 , Y02T10/7005 , Y02T10/7241 , Y02T10/7275
摘要： Methods and systems for controlling a power inverter in an electric drive system of an automobile are provided. The various embodiments control the power inverter by, responsive to either a commanded torque of the electric motor being above a first torque level, or a commanded speed of the electric motor being above a first speed level, controlling the power inverter with a discontinuous pulse width modulated (DPWM) signal to generate a modulated voltage waveform for driving the electric motor. Additionally, the embodiments control the power inverter by, responsive to both a commanded torque of the electric motor being below the first torque level, and a commanded speed of the electric motor being below the first speed level, controlling the power inverter with a continuous pulse width modulated (CPWM) signal to generate the modulated voltage waveform for driving the electric motor.
摘要翻译：提供了一种用于控制汽车电驱动系统中的电力逆变器的方法和系统。各种实施例通过响应于电动机的指令转矩高于第一转矩水平或电动机的指令速度高于第一速度水平来控制功率逆变器，以不连续脉冲宽度控制功率逆变器调制（DPWM）信号以产生用于驱动电动机的调制电压波形。此外，这些实施例通过响应于电动机的指令转矩低于第一转矩水平和电动机的指令速度低于第一速度水平来控制功率逆变器，以连续脉冲宽度调制（CPWM）信号以产生用于驱动电动机的调制电压波形。

95. 发明授权

US07471526B2 Method and apparatus to reduce PWM voltage distortion in electric drives 有权
标题翻译：减少电力驱动器中PWM电压失真的方法和装置
公开(公告)号：US07471526B2
公开(公告)日：2008-12-30
申请号：US11676574
申请日：2007-02-20
申请人： Brian A Welchko , Bonho Bae , Steven E. Schulz , Silva Hiti
发明人： Brian A Welchko , Bonho Bae , Steven E. Schulz , Silva Hiti
IPC分类号： H02M7/537 , H02P23/00
CPC分类号： H03K3/017 , H02M7/5395 , H02M2001/0025 , H02P27/06
摘要： Methods and apparatus are provided for reducing voltage distortion effects at low speed operation in electric drives. The method comprises receiving a first signal having a duty cycle with a range between minimum and maximum achievable duty cycles, producing a second duty cycle based on the minimum achievable duty cycle if the duty cycle is within a distortion range and less than a first clipping value, producing a second duty cycle based on the closer of minimum and maximum pulse widths if the duty cycle is within the distortion range and between the first and a second clipping value, producing a second duty cycle based on the maximum achievable duty cycle if the duty cycle is within the distortion range and greater than the second clipping value, and transmitting a second signal to the voltage source inverter having the second duty cycle.
摘要翻译：提供了用于在电驱动器中降低低速运行时的电压失真效应的方法和装置。该方法包括接收具有在最小和最大可实现占空比之间的范围的占空比的第一信号，如果占空比在失真范围内并小于第一限幅值，则基于最小可实现占空比产生第二占空比如果占空比在失真范围内，并且在第一和第二限幅值之间，则基于更小的最小和最大脉冲宽度产生第二占空比，如果占空比基于最大可实现的占空比，则产生第二占空比循环处于失真范围内并且大于第二限幅值，并且将第二信号发送到具有第二占空比的电压源逆变器。

96. 发明申请

US20080297100A1 APPARATUS, SYSTEMS, AND METHODS FOR REDUCING VOLTAGE SOURCE INVERTER LOSSES 有权
标题翻译：降低电压源逆变器损耗的装置，系统和方法
公开(公告)号：US20080297100A1
公开(公告)日：2008-12-04
申请号：US11756421
申请日：2007-05-31
申请人： Silva Hiti , Steven E. Schulz , Brian A. Welchko
发明人： Silva Hiti , Steven E. Schulz , Brian A. Welchko
IPC分类号： H02P27/04
CPC分类号： H02M7/53875 , B60L15/025 , B60L2210/42 , B60L2240/70 , H02M2001/0054 , H02M2007/53876 , Y02T10/643 , Y02T10/7241 , Y02T10/7291 , Y02T90/16
摘要： Apparatus, systems, and methods are provided for reducing voltage source inverter losses. One apparatus includes a sensor couplable to the motor and configured to sense an operating frequency of the motor and an amount of torque produced by the motor. The apparatus also includes a controller coupled to the sensor, the controller configured to determine a zero vector modulation (ZVM) based on the sensed frequency and torque. A system includes means for sensing a threshold output frequency of the motor and means for sensing a threshold torque of the motor. The system also includes means for determining a ZVM for the inverter based on the sensed threshold frequency and threshold torque. One method includes sensing that a motor is operating below a threshold frequency and is producing torque above a threshold torque amount. The method also includes determining a ZVM for the inverter based on the sensed frequency and torque.
摘要翻译：提供了用于减少电压源逆变器损耗的装置，系统和方法。一种装置包括可耦合到电动机并且被配置为感测电动机的工作频率和由电动机产生的转矩的量的传感器。该装置还包括耦合到传感器的控制器，该控制器被配置成基于感测到的频率和转矩来确定零矢量调制（ZVM）。系统包括用于感测电动机的阈值输出频率的装置和用于感测电动机的阈值转矩的装置。该系统还包括用于基于感测的阈值频率和阈值扭矩来确定用于逆变器的ZVM的装置。一种方法包括检测电动机工作在阈值频率以下并且产生高于阈值扭矩量的转矩。该方法还包括基于感测的频率和转矩来确定逆变器的ZVM。

97. 发明申请

US20080272731A1 METHOD AND SYSTEM FOR RESOLVER ALIGNMENT IN ELECTRIC MOTOR SYSTEM 有权
标题翻译：电动机系统中的分辨率对准方法与系统
公开(公告)号：US20080272731A1
公开(公告)日：2008-11-06
申请号：US11743709
申请日：2007-05-03
申请人： Steven E. Schulz , Sean E. Gleason , Brian A. Welchko
发明人： Steven E. Schulz , Sean E. Gleason , Brian A. Welchko
IPC分类号： H02P27/04 , G05B1/06 , G05B11/42
CPC分类号： H02P21/06 , H02P21/14 , H02P2203/05
摘要： Methods and systems are provided for aligning a resolver in an electric motor system. The method includes commanding a d-axis current command and a speed command, operating an electric motor without a load in response to the d-axis current command and the speed command, determining a rotor speed in response to the speed command, and determining an offset of the resolver based on the speed command and the rotor speed when the rotor speed has substantially stabilized.
摘要翻译：提供了用于对准电动机系统中的旋转变压器的方法和系统。该方法包括：命令d轴电流指令和速度指令，响应于d轴电流指令和速度指令，无负载地操作电动机，响应速度指令确定转子速度，并且确定当转子速度基本上稳定时，基于速度指令和转子速度的旋转变压器的偏移。

98. 发明授权

US07432683B2 PWM pattern sequence to reduce losses in voltage source inverters 有权
标题翻译： PWM模式序列，以减少电压源逆变器的损耗
公开(公告)号：US07432683B2
公开(公告)日：2008-10-07
申请号：US11561513
申请日：2006-11-20
申请人： Brian Welchko , Steven E. Schulz , Silva Hiti , Stephen T. West
发明人： Brian Welchko , Steven E. Schulz , Silva Hiti , Stephen T. West
IPC分类号： H02P5/34
CPC分类号： H02P27/06 , H02M7/53875 , H02M2007/53876 , H02P21/00
摘要： A method for controlling an inverter uses sequences of predetermined states where each state uniquely corresponding to a set of control signals provided to the inverter that is coupled to a motor. The method includes repeatedly applying a first center null timing sequence of the states while monitoring a zero crossing condition and then changing the repeated application of the first center null timing sequence of the states into a repeated application of a second center null timing sequence of states when the monitoring detects a zero crossing condition. The repeated application of the first center null timing sequence sequentially provides the inverter with a first predetermined sequence of sets of control signals. The monitoring of a zero crossing condition monitors for a zero crossing condition in an electrical current flowing between the inverter and a terminal of the motor. The second center null timing sequence defines a second predetermined sequence of sets of control signals.
摘要翻译：用于控制逆变器的方法使用预定状态的序列，其中每个状态唯一对应于提供给耦合到电动机的逆变器的一组控制信号。该方法包括在监视过零状态的同时重复地应用状态的第一中心零点定时序列，然后将状态的第一中心零点定时序列的重复应用改变为重复应用第二中心零点定时时序序列，监控检测到过零状态。重复应用第一中心零点定时序列顺序地向逆变器提供第一预定的一组控制信号。过零状态的监视监视在逆变器和电动机的端子之间流动的电流中的过零状态。第二中心零点定时序列定义了控制信号组的第二预定序列。

99. 发明授权

US6154381A High efficiency power system with plural parallel DC/DC converters 有权
标题翻译：具有多个并联DC / DC转换器的高效率电力系统
公开(公告)号：US6154381A
公开(公告)日：2000-11-28
申请号：US345278
申请日：1999-06-30
申请人： Lateef A. Kajouke , Steven E. Schulz
发明人： Lateef A. Kajouke , Steven E. Schulz
IPC分类号： H02J1/10 , H02M3/158 , H02M3/00
CPC分类号： B60L1/00 , H02J1/102 , H02M3/1584 , B60L2270/147
摘要： A distributed staged power system for use in electric and hybrid electric vehicles, and the like. The system comprises a plurality of parallel DC-to-DC power modules that are controlled by way of input and output control signal interfaces using a smart controller. The distributed staged power system provides higher efficiency because of smart staging of the power modules. The distributed staged power system enables or disables each of the modules as determined by a smart controller to provide the highest possible conversion efficiency.
摘要翻译：用于电动和混合动力电动车辆的分布式电力系统等。该系统包括多个并行DC-DC电源模块，其通过使用智能控制器的输入和输出控制信号接口来控制。分布式电力系统由于电源模块的智能分级而提供更高的效率。分布式电力系统启用或禁用由智能控制器确定的每个模块，以提供最高的转换效率。

100. 发明授权

US08983788B2 System and method of measuring a sensor offset 有权
标题翻译：测量传感器偏移的系统和方法
公开(公告)号：US08983788B2
公开(公告)日：2015-03-17
申请号：US12895924
申请日：2010-10-01
申请人： Wei D. Wang , Steven E. Schulz , Jeffrey David , Jackie L Cui , Andrew M. Zettel , Hanne Buur
发明人： Wei D. Wang , Steven E. Schulz , Jeffrey David , Jackie L Cui , Andrew M. Zettel , Hanne Buur
IPC分类号： G01D18/00
CPC分类号： G01D18/006
摘要： A method includes detecting a first event and executing a first procedure to identify a sensor offset in response to detecting the first event. The method further includes determining, via a computing device, whether the sensor offset was measured during the execution of the first procedure, scheduling a second procedure to execute in response to detecting a second event if the sensor offset was not measured during the first procedure, and scheduling the first procedure to execute in response to detecting a subsequent occurrence of the first event if the sensor offset was measured during the first procedure.
摘要翻译：一种方法包括检测第一事件并且执行第一过程以响应于检测到第一事件来识别传感器偏移。该方法还包括经由计算设备确定在执行第一过程期间是否测量了传感器偏移量，如果在第一过程期间未测量传感器偏移量，则调度响应于检测到第二事件执行的第二过程，以及如果在所述第一过程期间测量了所述传感器偏移量，则响应于检测到所述第一事件的后续出现来调度所述第一过程以执行。

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