公开(公告)号：US5801504A

公开(公告)日：1998-09-01

申请号：US713105

申请日：1996-09-16

申请人： Shuji Endo ,  Yusuke Itakura ,  Hideyuki Kobayashi

发明人： Shuji Endo ,  Yusuke Itakura ,  Hideyuki Kobayashi

IPC分类号： B62D5/04 ,  H02P7/00 ,  H02P7/14

CPC分类号： B62D5/0463 ,  B62D5/046 ,  H02P7/04

摘要： A control apparatus for an electric power steering system assures stability of the feedback control and control generation of noise from the control circuit when the steering wheel automatically returns to the neutral position by means of the self-aligning torque in order to improve the feeling of the steering operation. In the motor driving circuit connecting four semiconductor elements in the shape of H bridge, the semiconductors of the first arm are driven by the duty ratio D1 while the semiconductors of the second arm are driven by the duty radio D2 defined by the function of the duty ratio D1 (D2 is longer in time than D1).

摘要翻译： 用于电动助力转向系统的控制装置确保当方向盘通过自动对准转矩自动返回到中立位置时反馈控制的稳定性和控制来自控制电路的噪声的产生，以便改善 转向操作。 在连接H桥形状的四个半导体元件的电机驱动电路中，第一臂的半导体由占空比D1驱动，而第二臂的半导体由占空比函数D2定义的占空比无线电D2驱动 比率D1（D2时间长于D1）。

公开(公告)号：US06837331B2

公开(公告)日：2005-01-04

申请号：US10773892

申请日：2004-02-06

申请人： Hideaki Kawada ,  Hisayoshi Koiwai ,  Yusuke Itakura ,  Yasuhiko Miyaura

发明人： Hideaki Kawada ,  Hisayoshi Koiwai ,  Yusuke Itakura ,  Yasuhiko Miyaura

IPC分类号： B62D5/04

CPC分类号： B62D5/049

摘要： An electric power steering device enabled to surely detect a fault of its motor current detector circuit by avoiding the disturbance by an electrically insulated oxide film formed on the contact surface between the commutator and the brush of the motor. An ignition key is turned on, then the motor applied voltage is increased with time to break the oxide film so that the motor current flows normally. The estimated motor current is then compared with the detected motor current. When the absolute value of the difference between those estimated motor current and detected motor currents is over a predetermined limit value, it is determined that the motor current detection circuit is defective. It is also possible to break the oxide film by integrating each difference between the motor current command value and the detected motor current value, thereby increasing the current control value step by step and increase voltage applied to the motor.

摘要翻译： 一种电动助力转向装置，其能够通过避免由形成在电动机的换向器和电刷之间的接触表面上的电绝缘氧化膜的干扰来确定地检测其电动机电流检测器电路的故障。 点火钥匙打开，电机施加的电压随时间增加，破坏氧化膜，使电机电流正常流动。 然后将估计的电动机电流与检测到的电动机电流进行比较。 当这些估计电动机电流和检测到的电动机电流之间的差的绝对值超过预定极限值时，确定电动机电流检测电路有缺陷。 也可以通过积分电动机电流指令值和检测到的电动机电流值之间的每个差异来破坏氧化膜，从而逐步增加电流控制值并增加施加到电动机的电压。

公开(公告)号：US06658333B2

公开(公告)日：2003-12-02

申请号：US10060292

申请日：2002-02-01

申请人： Hideaki Kawada ,  Yusuke Itakura ,  Yasuhiko Miyaura ,  Shuji Endo ,  Hisayoshi Koiwai

发明人： Hideaki Kawada ,  Yusuke Itakura ,  Yasuhiko Miyaura ,  Shuji Endo ,  Hisayoshi Koiwai

IPC分类号： B62D504

CPC分类号： B62D5/0484 ,  B62D5/049

摘要： A control apparatus of power steering device having functions of monitoring intermediate troubles such as offset or drift out of signal troubles of torque sensor, and limiting the current for limiting the assist function is presented. In a control apparatus of power steering device for controlling a motor on the basis of a current control value calculated from a steering assist command value calculated by calculating means on the basis of a steering torque generated on a steering shaft, and a current value of a motor for applying a steering assist force to a steering mechanism, wherein the difference of a main torque signal and a sub torque signal of a torque sensor for detecting the steering torque is stored preliminarily, and the difference of the main torque signal and the sub torque signal during operation is compared with the stored value, and at least the current control value is limited when the difference based on the comparison is a condition larger than a first prescribed value and continues for a time longer than a first prescribed time.

公开(公告)号：US6013994A

公开(公告)日：2000-01-11

申请号：US931619

申请日：1997-09-16

申请人： Shuji Endo ,  Hideyuki Kobayashi ,  Kei Chin ,  Yusuke Itakura ,  Hideaki Kawada

发明人： Shuji Endo ,  Hideyuki Kobayashi ,  Kei Chin ,  Yusuke Itakura ,  Hideaki Kawada

IPC分类号： B62D5/04 ,  H02P7/14

CPC分类号： B62D5/0463

摘要： To provide a controller of an electric power-steering system, capable of improving the steering performance by presuming a motor angular speed .omega. in a range in which the angular speed of a motor is small and moreover very accurately presuming the motor angular speed and thereby, completely showing the functions for compensating the inertia of the motor and controlling the astringency of a vehicle. Because the presumed error of a back electromotive force between a model motor and a motor to be actually mounted is proportional to a motor current, a dead zone of a motor angular speed having a width proportional to a motor current is set to the presumed value of the motor angular speed. When the motor current is small, the width of the dead zone also decreases. Therefore, it is possible to presume an angular speed .omega. even in a region where the motor angular speed is small. Moreover, a motor angular speed is presumed by defining impedance models of motor driving systems in an intermittent mode and a continuous mode.

摘要翻译： 为了提供一种电动助力转向系统的控制器，其能够通过在电动机的角速度小的范围内假定电动机角速度ω而改善转向性能，并且还非常准确地假设电动机的角速度， 完全显示了补偿电机惯性和控制车辆涩味的功能。 由于模型电动机和实际安装的电动机之间的反电动势的推测误差与电动机电流成比例，所以将具有与电动机电流成比例的宽度的电动机角速度的死区设定为 电机角速度。 当电动机电流小时，死区的宽度也减小。 因此，即使在电动机角速度小的区域中也可以设定角速度ω。 此外，通过以间歇模式和连续模式定义电机驱动系统的阻抗模型来推定电机角速度。