公开(公告)号：US06630809B2

公开(公告)日：2003-10-07

申请号：US09683180

申请日：2001-11-29

申请人： Li Chen ,  Xingyi Xu ,  Vinod Reddy ,  Richard Joseph Hampo ,  Kerry Eden Grand

发明人： Li Chen ,  Xingyi Xu ,  Vinod Reddy ,  Richard Joseph Hampo ,  Kerry Eden Grand

IPC分类号： H02P764

CPC分类号： H02P21/22

摘要： Field oriented induction motor system including a field oriented induction motor having an associated torque current and an associated flux current and a predetermined current ratio, wherein the predetermined current ratio is defined as the ratio of the torque current to the flux current, and wherein the predetermined current ratio is dependent upon the saturation state of the motor. A method for selecting the ratio of torque current to flux current for a field oriented induction motor including applying an allocation factor to the torque current and flux current, wherein the allocation factor is dependent upon the saturation state of the motor. The saturation state of the motor is determined based upon motor parameters.

摘要翻译： 磁场定向感应电动机系统包括具有相关联的转矩电流和相关联的磁通电流和预定电流比的场定向感应电动机，其中预定电流比被定义为转矩电流与磁通电流的比率，并且其中预定 电流比取决于电机的饱和状态。 一种用于选择场定向感应电动机的转矩电流与磁通电流的比率的方法，包括对转矩电流和磁通电流施加分配因子，其中分配因子取决于电动机的饱和状态。 电动机的饱和状态根据电机参数确定。

公开(公告)号：US06556941B2

公开(公告)日：2003-04-29

申请号：US10029753

申请日：2001-10-29

申请人： Roy E. Mallory ,  Neil Judell

发明人： Roy E. Mallory ,  Neil Judell

IPC分类号： H02P764

CPC分类号： G01H3/08 ,  G01M13/045

摘要： A process for obtaining the periodic component in a data vector of data taken of a sensed property of an element driven by one or more rotary components over several rotations. The procedure comprises first forming the data vector asynchronously with respect to rotation of said one or more rotary components. A series of marker signals representing the rotation of the one or more rotary components is also established. From these the periodic component of data in said data vector is determined as a function of the data in the data vector and the marker signals.

公开(公告)号：US06600290B1

公开(公告)日：2003-07-29

申请号：US09913507

申请日：2001-08-28

申请人： Markku Niemelä

发明人： Markku Niemelä

IPC分类号： H02P764

CPC分类号： H02P21/141 ,  H02P21/12 ,  H02P21/14 ,  H02P21/24

摘要： A method of correcting the stator flux estimate midpoint in alternating-current systems, the method comprising the step of determining a stator flux estimate (&PSgr;s, est?). The method is characterized in steps of forming the sum of the squares of the rectangular components (&PSgr;sx, est?, &PSgr;sy, est?) of the stator flux estimate to obtain a reference variable (k), low-pass filtering the reference variable (k) in order to obtain a low-frequency component (kfilt) of reference variable, subtracting the low-frequency component (kfilt) from the reference variable (k) in order to obtain a difference variable (e), determining rectangular correction term components (&PSgr;sx, corr?, &PSgr;sy, corr?) of the stator flux estimate (&PSgr;s, est?) by multiplying the difference variable (e) by the rectangular components (&PSgr;sx, est?, &PSgr;sy, est?) of the stator flux and a correction coefficient (K&PSgr;corr), and forming a midpoint-corrected stator flux estimate (&PSgr;s, fin?) by adding the correction term components to the components of the stator flux estimate.