| Patent Number |
Title Of Patent |
Date Issued |
| 7610133 |
Controller for electric power steering apparatus |
October 27, 2009 |
| In a controller for an electric power steering apparatus, a target value calculation element, which calculates target values of the drive currents of a motor on the basis of a detected value of the steering torque, is constituted by a first integrated circuit provided in a chip. A drive |
| 7604088 |
Electric power steering system |
October 20, 2009 |
| An electric power steering system is provided which is capable of providing a favorable steering feeling without using compensation logics such as of inertia compensation and friction compensation. The electric power steering system includes road-noise suppression control means (213) |
| 7577505 |
Electric power steering apparatus |
August 18, 2009 |
| A first restrict value calculating unit obtains a first restrict value Im1 on the basis of the integration value (Id.sup.2+Iq.sup.2) of a d-axis current detection value and a q-axis current detection value. A second restrict value calculator 50 calculates a second restrict value Im2 on |
| 7504786 |
Motor controller |
March 17, 2009 |
| A motor controller judges whether or not a duty cycle of a PWM control signal, which is used to open and close a switching element on a power supply line to a motor, is in a current detection permission region. When the duty cycle is in the current detection permission region, an imp |
| 7342366 |
Controller for brushless motor |
March 11, 2008 |
| The controller for a brushless motor controls motor current by executing updates of applied voltage to a coil in accordance with rotational position of a rotor, the target current, and the actual current flowing through the coil. The updates of applied voltage to the coil are executed |
| 7336047 |
Motor vehicle steering system |
February 26, 2008 |
| A motor vehicle steering system includes a motor driving circuit connected between a power supply and a ground for driving a multi-phase motor, PWM signal generating unit for generating an each-phase PWM signal for controlling a current flowing through each of phases of the multi-phase |
| 7298109 |
Electric power steering apparatus, and method for detecting abnormality of angle detector thereo |
November 20, 2007 |
| An electric power steering apparatus which comprises: an angle detector for outputting a sine wave signal and a cosine wave signal corresponding to a rotor position of a brushless DC motor; and a torque detector for detecting a steering torque applied to a steering member, and which |
| 7112933 |
Controller for brushless motor |
September 26, 2006 |
| In a controller for brushless motor which suppresses the generation of abnormal noise when the motor current is controlled by updating voltages applied to the coils, the present values of the applied voltages to the coils are calculated from the d axis target current, the q axis target |
| 7104145 |
Torque sensor |
September 12, 2006 |
| The torque sensor outputs a signal from a first detector which corresponds to the rotation angle of a first shaft, as a first alternating signal the phase of which changes in accordance with this change in the rotation angle, via a resistance and a capacitor which function as a low-pass |
| 6892588 |
Torque sensor |
May 17, 2005 |
| A first alternating signal of which phase changes according to changes in the rotation angle of a first shaft is output, and a second alternating signal of which phase changes according to changes in the rotation angle of a second shaft capable of rotating elastically with respect to the |
| 6843142 |
Torque sensor |
January 18, 2005 |
| The torque sensor outputs a sinusoidal first alternating signal the phase of which changes in accordance with change in the rotation angle of a first shaft, and a sinusoidal second alternating signal the phase of which changes in accordance with change in the rotation angle of a second s |
