Patent application number | Description | Published |
20080294313 | ELECTRIC POWER STEERING APPARATUS - An electric power steering apparatus includes a first torque command value calculating means that calculates a first torque command value on the basis of steering torque detected by a steering torque detecting means, a malfunction torque detecting means that detects malfunction of the steering torque detecting means, and a self aligning torque estimating means that estimates self aligning torque transmitted from a road surface to a steering mechanism, and the apparatus further includes a second torque command value calculating means that calculates a torque command value on the basis of the self aligning torque estimated by the self aligning torque estimating means, and an switching means that selects the second torque command value calculating means. | 11-27-2008 |
20090009127 | MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE USING THE SAME - A motor driving control device includes a current instruction value computing section | 01-08-2009 |
20090043443 | VEHICULAR STEERING ANGLE ESTIMATING APPARATUS AND ELECTRIC POWER STEERING APPARATUS MOUNTED THEREWITH - A vehicular steering angle estimating apparatus including wheel rotational speed sensors for detecting rotational speeds of left and right wheels of a vehicle, provided with a steering angle estimating portion for estimating and outputting a estimated steering angle | 02-12-2009 |
20090271069 | CONTROL UNIT OF ELECTRIC POWER STEERING APPARATUS - According to the present invention, a control unit of an electric power steering apparatus transmitting a steering assist force generated by a motor to a steering mechanism so as to reduce a steering force, the control unit includes a steering angle sensor for detecting a steering angle, a torque sensor for detecting a steering torque, a vehicle speed detecting means for detecting a vehicle speed, and a control means for controlling the motor on the basis of the steering angle, a steering angular speed, the steering torque and the vehicle speed, and the control means has a handle return control function, and corrects a steering feeling in accordance with the steering angle on the basis of the handle return control function. | 10-29-2009 |
20100280715 | CONTROL APPARATUS FOR ELECTRIC POWER STEERING APPARATUS - The present invention provides a control apparatus for an electric power steering apparatus comprises: a steering assist command value calculating section; a current control section that calculates a voltage command value; and a motor driving section that drives a motor based on the voltage command value, wherein an assist power from the motor is applied to a steering system, the control apparatus is characterized in that an SAT measuring section, that inputs an angular speed and an angular acceleration of the motor, the steering assist command value and the torque signal therein so as to estimate an SAT, is provided, and the SAT obtained by the SAT measuring section is feedbacked to the steering assist command value via a feedback section composed of a phase compensating section and a gain section. | 11-04-2010 |
20100286871 | CONTROL APPARATUS FOR ELECTRIC POWER STEERING APPARATUS - The present invention provides a control apparatus for an electric power steering apparatus comprises: a steering assist command value calculating section; a current control section that calculates a voltage command value; and a motor driving section that drives a motor based on the voltage command value, wherein an assist power from the motor is applied to a steering system, the control apparatus is characterized in that an SAT measuring section, that inputs an angular speed and an angular acceleration of the motor, the steering assist command value and the torque signal therein so as to estimate an SAT, is provided, and the SAT obtained by the SAT measuring section is feedbacked to the steering assist command value via a feedback section composed of a phase compensating section and a gain section. | 11-11-2010 |
20110264331 | ELECTRIC POWER STEERING APPARATUS - [Problem] The present invention provides a motor control apparatus that is capable of making the whole system robust not only with respect to motor parameter variations such as the temperature variation and the manufacturing unevenness but also with respect to disturbances and an electric power steering apparatus mounting the motor control apparatus thereon. | 10-27-2011 |