METHOD AND SYSTEM FOR OPERATING A MOTOR TO AVOID SELECTED PULSE RATIO VALUES
    31.
    发明申请
    METHOD AND SYSTEM FOR OPERATING A MOTOR TO AVOID SELECTED PULSE RATIO VALUES 有权
    用于操作电机以避免选择的脉冲比值的方法和系统

    公开(公告)号:US20080260362A1

    公开(公告)日:2008-10-23

    申请号:US11738854

    申请日:2007-04-23

    IPC分类号: H02P7/08

    摘要: 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.

    摘要翻译: 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。

    ANTI-WINDUP CONTROL FOR A CURRENT REGULATOR OF A PULSE WIDTH MODULATION INVERTER
    32.
    发明申请
    ANTI-WINDUP CONTROL FOR A CURRENT REGULATOR OF A PULSE WIDTH MODULATION INVERTER 有权
    脉冲宽度调制逆变器的电流调节器的反向控制

    公开(公告)号:US20080224649A1

    公开(公告)日:2008-09-18

    申请号:US11685729

    申请日:2007-03-13

    IPC分类号: H02P27/04

    CPC分类号: H02P21/22

    摘要: A control architecture for an electrical inverter includes a command limiter that is realized as a circular voltage limiter. The command limiter includes a Cartesian-to-polar converter coupled to a command source such as a synchronous frame current regulator. The Cartesian-to-polar converter provides magnitude and phase components for d-q command voltages. The command limiter further includes a magnitude limiter that limits the magnitude component to the maximum fundamental voltage component of the inverter, and a polar-to-Cartesian converter that converts the limited magnitude component and the phase component into modified d-q command voltages.

    摘要翻译: 用于逆变器的控制结构包括实现为圆形电压限制器的指令限制器。 命令限制器包括耦合到诸如同步帧电流调节器的命令源的笛卡尔到极化转换器。 笛卡尔到极化转换器为d-q指令电压提供幅度和相位分量。 命令限制器还包括限幅器,其将幅度分量限制到逆变器的最大基波电压分量;以及极限到笛卡尔转换器,其将受限幅度分量和相位分量转换为修改的d-q指令电压。

    Methods and apparatus for fault-tolerant control of electric machines
    33.
    发明授权
    Methods and apparatus for fault-tolerant control of electric machines 有权
    电机容错控制方法与装置

    公开(公告)号:US06989641B2

    公开(公告)日:2006-01-24

    申请号:US10452817

    申请日:2003-06-02

    IPC分类号: B60L3/00

    摘要: A method for controlling an electric machine having current sensors for less than every phase of the electric machine includes operating a processor to perform a test to preliminarily determine whether a fault exists in one or more of the current sensors and a test to finally determine that the fault exists in the one or more current sensors. The method further includes operating the processor to utilize a state observer of the electric machine to estimate states of the electric machine, wherein the state observer is provided state input measurements from each non-faulty current sensor, if any. Measurements from the current sensor or sensors determined to be faulty are disregarded. The processor controls the electric machine utilizing results from the state observer.

    摘要翻译: 用于控制具有小于电机每相的电流传感器的电机的方法包括操作处理器以执行测试,以初步确定在一个或多个电流传感器中是否存在故障,并且进行测试以最终确定 一个或多个电流传感器存在故障。 该方法还包括操作处理器以利用电机的状态观察器来估计电机的状态,其中状态观察器被提供来自每个非故障电流传感器的状态输入测量值(如果有的话)。 来自当前传感器或被确定为有故障的传感器的测量被忽略。 处理器利用来自状态观测器的结果控制电机。

    Motor control system for achieving peak torque
    37.
    发明授权
    Motor control system for achieving peak torque 有权
    电机控制系统实现峰值扭矩

    公开(公告)号:US08134321B2

    公开(公告)日:2012-03-13

    申请号:US12419371

    申请日:2009-04-07

    IPC分类号: H02P7/00

    CPC分类号: H02P21/22

    摘要: In a motor controller, a modified interpolation technique uses an extrapolated torque command for the upper table to improve torque linearity under certain conditions. When the torque command input is greater than the max torque limit of a first look-up table, but less than the maximum torque limit of a second, adjacent look-up table, the desired current command is computed by interpolating between the maximum torque limit of the first table and a revised torque value for the second look-up table, wherein the revised torque value is determined by extrapolating from the maximum torque limit of the first look-up table through a torque value based on the torque command input.

    摘要翻译: 在电动机控制器中,改进的插补技术使用上表的外推转矩指令来在某些条件下提高扭矩线性度。 当转矩指令输入大于第一查找表的最大转矩限制但小于第二相邻查找表的最大转矩极限时,通过内插最大转矩极限来计算所需电流指令 以及第二查找表的修正扭矩值,其中,通过基于转矩指令输入的转矩值,通过从第一查找表的最大转矩极限推断来确定修正后的转矩值。

    Methods, systems and apparatus for reducing power loss in an electric motor drive system
    38.
    发明授权
    Methods, systems and apparatus for reducing power loss in an electric motor drive system 有权
    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

    IPC分类号: H02P7/00

    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。

    Protection of motor drive systems from current sensor faults
    39.
    发明授权
    Protection of motor drive systems from current sensor faults 有权
    保护电机驱动系统免受电流传感器故障的影响

    公开(公告)号:US08867181B2

    公开(公告)日:2014-10-21

    申请号:US13244052

    申请日:2011-09-23

    摘要: Methods and apparatus are provided for detecting a phase current sensor fault in a multi-phase electrical motor. The method comprises, receiving an input torque command T* and measuring a set of feedback signals of the motor including a phase current Ix for each of the phases of the motor, generating direct and quadrature command phase currents Id*, Iq* for the motor corresponding to a value of the input torque command T*, determining a total command current Is=[(Iq*)2+(Id*)2]½, generating a negative sequence current Ineg, where for three phases Ineg=(⅓)[Ia+(α2)Ib+(α)Ic], where α=ej2π/3, combining Ineg and Is to provide a normalized negative sequence current Inn=Ineg/Is, comparing the normalized negative sequence current Inn to a predetermined threshold value INN* to determine the presence of a phase current sensor fault, and executing a control action when Inn>INN*.

    摘要翻译: 提供了用于检测多相电动机中的相电流传感器故障的方法和装置。 该方法包括:接收输入转矩指令T *并测量电动机的一组反馈信号,该电动机的每个相位包括相电流Ix,为电动机产生直接和正交指令相电流Id *,Iq * 对应于输入转矩指令T *的值,确定总指令电流Is = [(Iq *)2+(Id *)2] 1/2,产生负序电流Ineg,其中三相Ineg =(1/3) [Ia +(α2)Ib +(α)Ic],其中α= ej2&pgr; / 3,组合Ineg和Is,以提供归一化的负序电流Inn = Ineg / Is,将归一化负序电流Inn与预定阈值INN *确定相电流传感器故障的存在,并在Inn> INN *时执行控制动作。