公开(公告)号：US07061134B2

公开(公告)日：2006-06-13

申请号：US10632257

申请日：2003-08-01

Applicant: Silva Hiti ,  Constantin C. Stancu ,  Khwaja Rahman ,  Scott D. Downer ,  James M. Nagashima ,  Eric R. Ostrom

Inventor： Silva Hiti ,  Constantin C. Stancu ,  Khwaja Rahman ,  Scott D. Downer ,  James M. Nagashima ,  Eric R. Ostrom

IPC: H02P9/04 ,  H02P5/34

CPC classification number: H02P27/12 ,  H02M7/5387 ,  H02M2001/0054 ,  H02M2007/53876 ,  Y02B70/1491

Abstract: The present invention includes a method for thermal management in a voltage source inverter. The method includes sensing a low output frequency condition, determining a zero vector modulation responsive to the sensed low output frequency condition, and applying the determined zero vector modulation to reduce thermal stress in the voltage source inverter. The step of determining the zero vector modulation responsive to the sensed low output frequency condition includes mapping an output voltage requirement to a space vector structure and determining state switching space vectors based on the mapped output voltage requirement. The step of determining the state switching space vector includes determining active state switching space vectors associated with the state switching space vectors, determining duty cycles for the active state switching space vectors based on the active state switching space vectors, and determining a duty cycle for at least one zero state switching space vector based on the determined duty cycles of the active state switching space vectors and a switching period.

Abstract translation: 本发明包括电压源逆变器中的热管理方法。 该方法包括感测低输出频率条件，响应于感测的低输出频率条件确定零矢量调制，以及应用所确定的零矢量调制以减小电压源逆变器中的热应力。 响应于感测的低输出频率条件来确定零矢量调制的步骤包括将输出电压需求映射到空间矢量结构，并且基于映射的输出电压要求来确定状态切换空间矢量。 确定状态切换空间矢量的步骤包括确定与状态切换空间矢量相关联的活动状态切换空间矢量，基于活动状态切换空间矢量确定活动状态切换空间矢量的占空比，以及确定在 基于确定的活动状态切换空间矢量的占空比和切换周期的至少一个零状态切换空间矢量。

公开(公告)号：US07042186B2

公开(公告)日：2006-05-09

申请号：US10720626

申请日：2003-11-24

Applicant: Constantin C. Stancu ,  Silva Hiti ,  Steven E. Schulz ,  Nitinkumar R. Patel

Inventor： Constantin C. Stancu ,  Silva Hiti ,  Steven E. Schulz ,  Nitinkumar R. Patel

IPC: G05B11/36

CPC classification number: H02P6/185 ,  H02P6/183 ,  H02P21/18 ,  H02P2203/11 ,  H02P2207/01

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US06684483B2

公开(公告)日：2004-02-03

申请号：US09952319

申请日：2001-09-14

Applicant: Khwaja M. Rahman ,  Peter James Savagian ,  Francois J. Biais ,  Constantin C. Stancu

Inventor： Khwaja M. Rahman ,  Peter James Savagian ,  Francois J. Biais ,  Constantin C. Stancu

IPC: H02K1500

CPC classification number: H02K15/03 ,  Y02T10/641 ,  Y10T29/49009 ,  Y10T29/49012 ,  Y10T29/49075 ,  Y10T29/49803

Abstract: A method of fabricating a rotor for an electric traction motor including the steps of forming cavities in the rotor, injecting magnetic material in a portion of the cavities, injecting nonmagnetic material in a portion of the cavities, and post-magnetizing the magnetic material.

Abstract translation: 一种制造用于电动牵引电动机的转子的方法，包括以下步骤：在转子中形成空腔，在空腔的一部分中注入磁性材料，在空腔的一部分中注入非磁性材料，以及对磁性材料进行后磁化。

公开(公告)号：US06504329B2

公开(公告)日：2003-01-07

申请号：US09829106

申请日：2001-04-09

Applicant: Constantin C. Stancu ,  Silva Hiti ,  James M. Nagashima

Inventor： Constantin C. Stancu ,  Silva Hiti ,  James M. Nagashima

IPC: H02P706

CPC classification number: B60L15/025 ,  H02P21/08 ,  Y02T10/643

Abstract: A control scheme for an surface-mounted permanent-magnet synchronous (SMPMS) drive uses a combination of an open-loop magnetizing current reference calculation and a stabilizing feedback term, which speeds-up the torque transient response. The feedback term increases the stability margin during torque transients by increasing the available voltage margin for current control. The magnetizing current reference calculation takes into account the saturation effects in the SMPMS drive, which occur at peak torque points, and compensates for them. By taking into account saturation effects, stable operation at high speed is achieved, thereby increasing the speed range of the SMPMS drive.

公开(公告)号：US6163128A

公开(公告)日：2000-12-19

申请号：US377927

申请日：1999-08-20

Applicant: Silva Hiti ,  Constantin C. Stancu ,  Dragan S. Maric

Inventor： Silva Hiti ,  Constantin C. Stancu ,  Dragan S. Maric

IPC: B60L11/18 ,  B60L15/02 ,  B60L15/20 ,  H02P5/28

CPC classification number: B60L11/1803 ,  B60L15/025 ,  B60L2220/14 ,  Y02T10/643 ,  Y02T10/7005 ,  Y02T10/7258

Abstract: A surface-mounted permanent magnet synchronous machine drive 10 and a method 30 of controlling the machine drive. Flux weakening and current regulating loops 70, 60 cooperate to provide automatic transition to the flux weakening mode (operation above base speed), regardless of DC bus voltage, load or other operating conditions. This feature provides significant performance improvement. No look-up tables are used in the flux weakening loop. The on-set point for flux weakening is automatically adjusted, and may be changed through software. An appropriate d-axis current component is injected over the entire speed range, providing the maximum available torque (which corresponds to the q-axis current component). The control method works with fixed frequency current compensators.

Abstract translation: 表面安装永磁同步电机驱动装置10和控制机器驱动的方法30。 磁通弱化和电流调节回路70,60协作以提供自由转换到磁通弱化模式（高于基本速度的操作），而不管DC总线电压，负载或其它操作条件如何。 此功能可显着提升性能。 磁通弱化回路中没有使用查找表。 磁通弱化的设定点自动调整，可通过软件更改。 在整个速度范围内注入适当的d轴电流分量，提供最大可用转矩（对应于q轴电流分量）。 控制方式适用于固定频率电流补偿器。