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21. 发明申请

US20080197902A1 METHOD AND APPARATUS TO REDUCE PWM VOLTAGE DISTORTION IN ELECTRIC DRIVES 有权
标题翻译：降低电动机PWM电压失真的方法和装置
公开(公告)号：US20080197902A1
公开(公告)日：2008-08-21
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： H03K3/017
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。

22. 发明申请

US20080183405A1 TORQUE ESTIMATOR FOR IPM MOTORS 有权
标题翻译： IPM电机的扭矩估计
公开(公告)号：US20080183405A1
公开(公告)日：2008-07-31
申请号：US11668830
申请日：2007-01-30
申请人： Brian A. Welchko , Silva Hiti , Steven E. Schulz
发明人： Brian A. Welchko , Silva Hiti , Steven E. Schulz
IPC分类号： G01L3/00
CPC分类号： H02P23/14
摘要： In an embodiment of a method, the method includes measuring currents and voltages that are coupled to a motor that includes an internal permanent magnet and determining a reactive power in response to the measured currents and voltages. The method further includes estimating a first flux orthogonal to an axis of the internal permanent motor and estimating a second flux aligned with the axis of the internal permanent motor. Additionally, the method includes estimating a torque in response to the measured currents and the first and second fluxes.
摘要翻译：在方法的实施例中，该方法包括测量耦合到包括内部永磁体的电动机的电流和电压，并响应于测量的电流和电压来确定无功功率。该方法还包括估计与内部永久电动机的轴正交的第一通量，并估计与内部永久电动机的轴线对准的第二通量。另外，该方法包括响应于测量的电流和第一和第二通量来估计转矩。

23. 发明申请

US20080258673A1 METHOD AND SYSTEM FOR PULSE POSITION SCHEDULING IN ELECTRIC DRIVES 有权
标题翻译：电机驱动脉冲位置调度方法与系统
公开(公告)号：US20080258673A1
公开(公告)日：2008-10-23
申请号：US11736687
申请日：2007-04-18
申请人： Brian A. Welchko , Steven E. Schulz , Silva Hiti
发明人： Brian A. Welchko , Steven E. Schulz , Silva Hiti
IPC分类号： H02P27/08 , H02M1/12
CPC分类号： H02M1/12 , H02P27/08 , H03K7/04
摘要： Method and system are provided for controlling an alternating current (AC) motor via an inverter. The method includes selecting a pulse sequencing method based on a modulation index of the inverter, and providing a voltage to the AC motor based on the pulse sequencing method. The system includes an inverter having a modulation index (Mi) and a controller coupled to the inverter. The controller selects a pulse sequencing method based on Mi and produces a signal based on the pulse sequencing method. The inverter includes a switch network producing a voltage in response to the signal, and the voltage drives the AC motor.
摘要翻译：提供了用于通过逆变器控制交流（AC）电动机的方法和系统。该方法包括基于逆变器的调制指数选择脉冲排序方法，并且基于脉冲排序方法向交流电动机提供电压。该系统包括具有调制指数（M SUB）的逆变器和耦合到逆变器的控制器。控制器选择基于M i i i的脉冲排序方法，并基于脉冲排序方法产生信号。逆变器包括响应于信号产生电压的开关网络，并且电压驱动AC电动机。

24. 发明授权

US08062170B2 Thermal protection of an electric drive system 有权
标题翻译：电力驱动系统的热保护
公开(公告)号：US08062170B2
公开(公告)日：2011-11-22
申请号：US11863592
申请日：2007-09-28
申请人： Stephen T. West , Wei D. Wang , Brian A Welchko , Steven E. Schulz , Peter E. Wu
发明人： Stephen T. West , Wei D. Wang , Brian A Welchko , Steven E. Schulz , Peter E. Wu
IPC分类号： B60W10/08 , F16H59/64
CPC分类号： G05D23/1934 , H02P29/0241 , H02P29/60 , Y10T477/23 , Y10T477/653
摘要： Temperature of an electric drive is regulated to prevent undesirable thermal effects. Temperature conditions of the electric drive system are monitored and torque of the electric drive system is limited based on the temperature conditions.
摘要翻译：电驱动器的温度被调节以防止不期望的热效应。监控电力驱动系统的温度条件，并根据温度条件限制电力驱动系统的转矩。

25. 发明申请

US20090088294A1 THERMAL PROTECTION OF AN ELECTRIC DRIVE SYSTEM 有权
标题翻译：电力驱动系统的热保护
公开(公告)号：US20090088294A1
公开(公告)日：2009-04-02
申请号：US11863592
申请日：2007-09-28
申请人： Stephen T. West , Wei D. Wang , Brian A. Welchko , Steven E. Schulz , Peter E. Wu
发明人： Stephen T. West , Wei D. Wang , Brian A. Welchko , Steven E. Schulz , Peter E. Wu
IPC分类号： G05D23/20 , F16H59/64 , G06F19/00 , H02H7/12 , H02P27/06
CPC分类号： G05D23/1934 , H02P29/0241 , H02P29/60 , Y10T477/23 , Y10T477/653
摘要： Temperature of an electric drive is regulated to prevent undesirable thermal effects. Temperature conditions of the electric drive system are monitored and torque of the electric drive system is limited based on the temperature conditions.
摘要翻译：电驱动器的温度被调节以防止不期望的热效应。监控电力驱动系统的温度条件，并根据温度条件限制电力驱动系统的转矩。

26. 发明申请

US20080116840A1 PWM PATTERN SEQUENCE TO REDUCE LOSSES IN VOLTAGE SOURCE INVERTERS 有权
标题翻译： PWM模式序列减少电压源逆变器中的损耗
公开(公告)号：US20080116840A1
公开(公告)日：2008-05-22
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： H02P27/04
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。

27. 发明授权

US07518335B2 Method and apparatus for PWM control of voltage source inverter to minimize current sampling errors in electric drives 有权
标题翻译：用于电压源逆变器PWM控制的方法和装置，以最小化电力驱动器中的电流采样误差
公开(公告)号：US07518335B2
公开(公告)日：2009-04-14
申请号：US11462454
申请日：2006-08-04
申请人： Stephen T. West , Brian Welchko , Steven E. Schulz , Silva Hiti
发明人： Stephen T. West , Brian Welchko , Steven E. Schulz , Silva Hiti
IPC分类号： H02P27/08
CPC分类号： H02P27/08
摘要： A method for controlling an alternating current (AC) motor includes choosing a pulse sequence based on a ripple current in the AC motor at a sampling instant; and providing a voltage to the AC motor based on the pulse sequence.
摘要翻译：一种用于控制交流（AC）电动机的方法包括：在采样时刻根据交流电动机的纹波电流选择脉冲序列; 并且基于脉冲序列向AC电动机提供电压。

28. 发明申请

US20080094023A1 METHOD AND APPARATUS FOR PWM CONTROL OF VOLTAGE SOURCE INVERTER TO MINIMIZE CURRENT SAMPLING ERRORS IN ELECTRIC DRIVES 有权
标题翻译：用于电压源逆变器的PWM控制以最小化电驱动电流采样误差的方法和装置
公开(公告)号：US20080094023A1
公开(公告)日：2008-04-24
申请号：US11462454
申请日：2006-08-04
申请人： Stephen T. West , Brian Welchko , Steven E. Schulz , Silva Hiti
发明人： Stephen T. West , Brian Welchko , Steven E. Schulz , Silva Hiti
IPC分类号： H02P27/08 , H02P27/00
CPC分类号： H02P27/08
摘要： A method for controlling an alternating current (AC) motor includes choosing a pulse sequence based on a ripple current in the AC motor at a sampling instant; and providing a voltage to the AC motor based on the pulse sequence.
摘要翻译：一种用于控制交流（AC）电动机的方法包括：在采样时刻根据交流电动机的纹波电流选择脉冲序列; 并且基于脉冲序列向AC电动机提供电压。

29. 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。

30. 发明授权

US08319460B2 Method and system for initiating operation of an electric motor 有权
标题翻译：电动机启动运行的方法和系统
公开(公告)号：US08319460B2
公开(公告)日：2012-11-27
申请号：US12606839
申请日：2009-10-27
申请人： Yo Chan Son , Jihoon Jang , Brian A. Welchko , Nitinkumar R. Patel , Steven E. Schulz
发明人： Yo Chan Son , Jihoon Jang , Brian A. Welchko , Nitinkumar R. Patel , Steven E. Schulz
IPC分类号： H02P6/04
CPC分类号： H02P6/20
摘要： Methods and systems for controlling an electric motor are provided. The motor includes a plurality of windings. Each winding is coupled to a respective set of first and second switches. The first switch of each set of switches is simultaneously activated. Current flow through the plurality of windings is measured while the first switch of each set of switches is activated. The electric motor is controlled according to a first motor control method if the measured current is below a predetermined threshold. The electric motor is controlled according to a second motor control method if the measured current is above the predetermined threshold.
摘要翻译：提供了用于控制电动机的方法和系统。马达包括多个绕组。每个绕组耦合到相应的一组第一和第二开关。每组开关的第一个开关同时被激活。当每组开关的第一开关被激活时，测量通过多个绕组的电流。如果测量电流低于预定阈值，则根据第一电动机控制方法来控制电动机。如果测量的电流高于预定阈值，则根据第二电动机控制方法来控制电动机。

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