Abstract: An electric power steering apparatus that realizes vibration suppression of response characteristics and has a control performance having resistance properties against disturbances such as a road surface change by using a velocity I-P control (a proportional-lead type PI control) in a vehicle having functions of an automatic steering control and a manual steering control.

Abstract: [Problem] An object of the present invention is to provide an electric power steering control unit that detects the vibration components of the vibration compressing object such as the handle and current command value based on an expression of Fourier series of which calculation capacity is small, changes a gain of the PI control section at only a time when the vibration of the predetermined frequency continues during the predetermined time or more and compresses the vibration, and improves the steering feeling.

Abstract: An electric power steering apparatus that detects that a driver has steered the handle by using a steering torque detected by a torque sensor, switches to the manual steering mode due to a capacity (an integrated value) corresponding to a generated torque, and does not provide an uncomfortable feeling to the driver.

Abstract: [Problem] An object of the present invention is to provide an electric power steering apparatus that is capable of smoothly switching the steering when a driver steers a steering wheel during the automatic steering control and in the case that a steering direction of the automatic control is different from a direction of the steering wheel steering by the driver.

Abstract: An electric power steering apparatus that realizes vibration suppression of response characteristics and has a control performance having resistance properties against disturbances such as a road surface change by using a velocity I-P control (a proportional-lead type PI control) in a vehicle having functions of an automatic steering control and a manual steering control.

Abstract: A control apparatus for an electric power steering apparatus, including a section that calculates a dead time characteristic value; a section that determines a steering status; a gain section that varies a gain of the dead time characteristic value in accordance with a determination of the steering status; a section that switches polarity determining methods in accordance with the determination of the steering status and determines a polarity on the basis of a detected current of a motor, a current command value or a model current; a temperature sensor that detects a temperature of an inverter; a calculating section that calculates a dead time temperature correction value corresponding to the temperature; and a processing section that calculates and processes the dead time temperature correction value with respect to a dead time compensation value with polarity based on an output of the gain section and outputs a dead time compensation value.

Abstract: To provide an electric power steering apparatus capable of suppressing a vibration of an assist torque while keeping a steering feeling. A current command value is calculated by adding a torque differential compensation value depending on a differential value of a steering torque to a basic assist current command value calculated based on the steering torque and vehicle speed. In this situation, the torque differential compensation value is calculated to be smaller when the steering speed of a steering wheel falls within a specific steering speed region in which a resonance phenomenon easily occurs due to a disturbance vibration of a steering assist torque, in comparison with when the steering speed falls outside the specific steering speed region.

Abstract: A control apparatus for an electric power steering apparatus, including a dead time characteristic section that calculates a dead time characteristic value; a steering status determining section that determines a steering status; a gain section that varies a gain of the dead time characteristic value in accordance with a determination of the steering status; a polarity determining section that switches polarity determining methods in accordance with the determination of the steering status and determines a polarity on the basis of a detected current of a motor, a current command value or a model current; a temperature sensor that detects a temperature of an inverter; a dead time temperature correction value calculating section that calculates a dead time temperature correction value corresponding to the temperature; and a calculation processing section that calculates and processes the dead time temperature correction value with respect to a dead time compensation value with polarity based on an output of the