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129 条记录 (耗时 0.032 秒)

    Method of controlling a voltage-fed induction machine
    91.
    发明授权
    Method of controlling a voltage-fed induction machine 有权
    控制电压感应电机的方法

    公开(公告)号：US06222335B1

    公开(公告)日：2001-04-24

    申请号：US09492662

    申请日：2000-01-27

    申请人： Silva Hiti ,  Constantin C. Stancu

    发明人： Silva Hiti ,  Constantin C. Stancu

    IPC分类号： H02P700

    CPC分类号： B60L15/2045 ,  B60L11/1803 ,  B60L15/025 ,  B60L2220/12 ,  H02P21/22 ,  Y02T10/643 ,  Y02T10/7005 ,  Y02T10/7283

    摘要： A control algorithm or method for use in controlling a voltage-fed induction machine. The control algorithm includes the following steps. The DC link voltage supplied to an inverter driving the induction machine is monitored. When the DC link voltage is high enough, the algorithm controls the amount of current supplied to the induction machine to provide current controlled operation of the induction machine. When the DC link voltage is not high enough to control the current under transient conditions, the induction machine is controlled by imposing the maximum possible phase voltage and optimal slip angle on the machine to provide maximal torque per ampere operation of the induction machine. The maximal torque per ampere operation is performed when either of the following conditions is met: a) the torque level required by the induction machine is such that efficiency optimization cannot be performed, or b) current regulators approach saturation. The current controlled operation is performed when a) the torque level required by the induction machine is at a level that allows efficiency optimization, and b) the current regulators are not near saturation. The efficiency optimization in the current controlled mode is performed by using a single constant over the whole operating range.

    摘要翻译： 一种用于控制电压感应电机的控制算法或方法。 控制算法包括以下步骤。 监控提供给驱动感应电机的变频器的直流母线电压。 当DC链路电压足够高时，算法控制提供给感应电机的电流量，以提供感应电机的电流控制操作。 当直流母线电压不足以在瞬态条件下控制电流时，通过在机器上施加最大可能的相电压和最佳滑移角来控制感应电机，以提供感应电机的每安培运行的最大扭矩。 当满足以下任一条件时，执行每安培运行的最大扭矩：a）感应电机所需的转矩水平使得不能执行效率优化，或b）电流调节器接近饱和。 当a）感应电机所需的转矩水平处于允许效率优化的水平，以及b）电流调节器不接近饱和时，执行电流控制操作。 通过在整个工作范围内使用单个常数来执行电流控制模式下的效率优化。

    Three phase inverter with improved loss distribution
    96.
    发明授权
    Three phase inverter with improved loss distribution 有权
    三相逆变器具有改善的损耗分布

    公开(公告)号：US07616466B2

    公开(公告)日：2009-11-10

    申请号：US11853873

    申请日：2007-09-12

    申请人： Sibaprasad Chakrabarti ,  Silva Hiti ,  George John ,  Gregory S. Smith ,  Milun Perisic ,  Gholamreza Esmaili

    发明人： Sibaprasad Chakrabarti ,  Silva Hiti ,  George John ,  Gregory S. Smith ,  Milun Perisic ,  Gholamreza Esmaili

    IPC分类号： H02M7/5387 ,  H02P27/04

    CPC分类号： H02M7/5395

    摘要： An inverter circuit couples a DC voltage source having a primary side and a reference side to an electric motor or other AC machine having multiple electrical phases. An inverter circuit includes switches, diodes and a controller. For each of the electrical phases, a first switch couples the electrical phase to the primary side of the DC voltage source and a second switch couples the electrical phase with the reference side of the DC voltage source. For each of the first and second switches, an associated anti-parallel diode is configured to provide an electrical path when the switch associated with the diode is inactive. The controller is coupled to the switching inputs of each of the first and second switches and is configured to provide a control signal thereto, wherein the control signal provided to each switch comprises, in a low frequency mode, a first portion and a second portion, wherein the first portion comprises a first pulse width modulation scheme and the second portion comprises a second pulse width modulation scheme different from the first modulation scheme.

    摘要翻译： 逆变器电路将具有初级侧和参考侧的DC电压源耦合到具有多个电相的电动机或其它AC电机。 逆变器电路包括开关，二极管和控制器。 对于每个电相，第一开关将电相耦合到DC电压源的初级侧，而第二开关将电相与DC电压源的参考侧耦合。 对于第一和第二开关中的每一个，相关联的反并联二极管被配置为当与二极管相关联的开关不活动时提供电路径。 控制器耦合到第一和第二开关中的每一个的开关输入，并且被配置为向其提供控制信号，其中提供给每个开关的控制信号在低频模式下包括第一部分和第二部分， 其中所述第一部分包括第一脉冲宽度调制方案，并且所述第二部分包括不同于所述第一调制方案的第二脉冲宽度调制方案。

    POWER INVERTER MODULE THERMAL MANAGEMENT
    97.
    发明申请
    POWER INVERTER MODULE THERMAL MANAGEMENT 有权
    电力逆变器模块热管理

    公开(公告)号：US20090072770A1

    公开(公告)日：2009-03-19

    申请号：US11853862

    申请日：2007-09-12

    申请人： Yo Chan Son ,  Gabriel Gallegos-Lopez ,  Silva Hiti ,  Michael Milani ,  Milun Perisic

    发明人： Yo Chan Son ,  Gabriel Gallegos-Lopez ,  Silva Hiti ,  Michael Milani ,  Milun Perisic

    IPC分类号： H02H7/08 ,  H02P23/14 ,  B60L11/00 ,  H02P29/02

    CPC分类号： B60L3/12 ,  B60L3/06 ,  B60L2240/525 ,  H02P29/68 ,  Y02T10/642

    摘要： According to an example embodiment, a method is provided for limiting an operational temperature of a motor. The method includes generating a maximum allowable current I*S(max) for a motor based on a temperature difference between a temperature reference T* of a power inverter module and a semiconductor device temperature T of the power inverter module. The method further includes generating a maximum allowable torque T*e(max) based on the maximum allowable current I*S(max) and a maximum allowable flux Ψ*S(max), and using the maximum allowable torque T*e(max) to limit the torque command T*e in order to suppress the semiconductor device temperature T to below the temperature reference T*.

    摘要翻译： 根据示例性实施例，提供了一种用于限制电动机的工作温度的方法。 该方法包括基于电力逆变器模块的温度参考值T *和功率逆变器模块的半导体器件温度T之间的温差产生电动机的最大允许电流I * S（max）。 该方法还包括基于最大允许电流I * S（max）和最大允许通量Psi * S（max）产生最大允许转矩T * e（max），并使用最大允许转矩T * e ）以限制转矩指令T * e，以便将半导体器件温度T抑制到低于温度参考值T *。

    PWM method for cycloconverter
    98.
    发明授权
    PWM method for cycloconverter 失效
    循环换流器的PWM方法

    公开(公告)号：US07483282B2

    公开(公告)日：2009-01-27

    申请号：US11468001

    申请日：2006-08-29

    申请人： Lateef A. Kajouke ,  Silva Hiti

    发明人： Lateef A. Kajouke ,  Silva Hiti

    IPC分类号： H02M7/48 ,  H02M5/00

    CPC分类号： H02M5/297 ,  H02M7/4807

    摘要： A method of using a cycloconverter switches a first switch of the first topology type to an on state after a magnitude of a current through an output inductor becomes less than a predetermined current threshold, and switches a second switch of the first topology type to an off state a first time after switching the first switch to the on state. The cycloconverter includes nodes on a first port, nodes on a second port, a switch pair coupled between a first node of the first port and a first node of the second port, a switch pair coupled between a second node of the first port and a first node of the second port, a switch pair coupled between a first node of the first port and a second node of the second port, and a switch pair coupled between a second node of the first port and a second node of the second port. Each switch pair includes a switch of each topology type.

    摘要翻译： 在通过输出电感器的电流的大小变得小于预定电流阈值之后，使用循环换流器的方法将第一拓扑类型的第一开关切换到导通状态，并且将第一拓扑类型的第二开关切换到关闭 在将第一开关切换到接通状态之后，首先进行状态。 循环变换器包括第一端口上的节点，第二端口上的节点，耦合在第一端口的第一节点和第二端口的第一节点之间的交换机对，耦合在第一端口的第二节点和 第二端口的第一节点，耦合在第一端口的第一节点和第二端口的第二节点之间的开关对，以及耦合在第一端口的第二节点和第二端口的第二节点之间的开关对。 每个交换机对包括每种拓扑类型的交换机。

    Decoupling a harmonic signal from a signal path
    100.
    发明申请
    Decoupling a harmonic signal from a signal path 失效
    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。