Nidec Corporation

Nidec Elesys Corporation

Hiroyuki Ishimura

Shuji Endo

Hanyu Sun

A control device obtains an assist torque of an electric power steering device based on a steering torque, compensates for the assist torque, varies an amount of change in a compensation amount based on the steering torque, and increases the compensation amount to cancel a disturbance of the assist torque as a frequency of a disturbance affecting the steering system increases.

Control device, drive device, electric power steering device, and control method

A processor acquires a steering torque detected by a steering torque sensor and a vehicle speed detected by a vehicle speed sensor, changes a gain and a phase to be applied to the steering torque in accordance with a steering frequency when a driver steers a steering wheel, determines a magnitude of an assist torque based on the steering torque to which the gain and the phase have been applied and the vehicle speed, and generates a torque command value to be used to control driving of the motor based on the determined assist torque.

Electric power steering apparatus, control device used in electric power steering apparatus, and control method

A steering control device for controlling drive of a motor that drives a steering mechanism according to an operation amount of a steering wheel, includes a first torque command controller that instructs the motor on motor torque according to the operation amount of the steering wheel, and a second torque command controller that instructs the motor on the motor torque according to the operation amount of the steering wheel in parallel with the first torque command controller. The second torque command controller suppresses a frequency region corresponding to disturbance added to the steering mechanism with respect to the operation amount of the steering wheel with a filter.

Steering control device and power steering device

Both responsiveness and stability of a power assist control system are satisfied. A processor executes, in accordance with a program, determining base assist gain based on steering torque and base assist torque, generating stabilizing compensation torque based on the base assist torque, with use of a stabilizing compensator that has a second-order or higher transfer function in which a frequency characteristic is variable in accordance with the base assist gain and which is expressed using a responsiveness parameter &#x3c9; and a damping parameter &#x3b6;, and generating a current command value for use in control of the motor based on the stabilizing compensation torque.

Control device and control method for use in electric power steering device, and motor module

A control device obtains a post-code extension steering torque by performing moving average processing of weighting an oversampling signal obtained by oversampling processing, obtains a base assist torque based on the post-code extension steering torque signal, acquires a base assist torque signal that decreases the base assist torque as a vehicle speed increases, performs stabilization processing on the base assist torque signal to obtain an assist torque signal according to the assist torque of an electric power steering device.

A steering control device for controlling a rotation angle of a motor that drives a steering mechanism according to a rotation angle of a steering wheel, includes a torque controller to control torque of the motor with the rotation angle of the steering wheel as a command value, and a phase advance processor to perform feedback control on the torque of the motor with at least one of the rotation angle and angular velocity of the motor as a command value, and advance a phase of a signal waveform to be fed back for a partial frequency range that includes a resonance frequency of the motor and the steering mechanism in an entire frequency range.

Growing community of inventors

Kawasaki, Japan

Hiroyuki Ishimura