JTEKT has been granted a patent for a motor control device that includes an automatic steering controller, an assist controller, and an integrated control amount calculating portion. The device also features an actual automatic steering angle calculating portion and a controller that controls an electric motor for steering angle control. The automatic steering controller sets the automatic steering control amount based on a target automatic steering angle and the actual automatic steering angle. GlobalData’s report on JTEKT gives a 360-degree view of the company including its patenting strategy. Buy the report here.
According to GlobalData’s company profile on JTEKT, crankshaft ball bearings was a key innovation area identified from patents. JTEKT's grant share as of June 2023 was 1%. Grant share is based on the ratio of number of grants to total number of patents.
Motor control device for integrated automatic steering control
A recently granted patent (Publication Number: US11685430B2) describes a motor control device that is designed to improve steering control in vehicles. The device includes several components and controllers that work together to enhance the steering experience.
The motor control device comprises a torque detector that detects the steering torque applied by the driver, as well as a steering angle detector that measures the actual steering angle. An automatic steering controller sets the automatic steering control amount, while an assist controller determines the assist control amount using the steering torque. These control amounts are then combined in an integrated control amount calculating portion. Based on this integrated control amount, a controller controls an electric motor responsible for steering angle control.
One key feature of the motor control device is the inclusion of an actual automatic steering angle calculating portion. This component calculates the actual automatic steering angle, which represents the steering angle resulting from automatic steering control. The automatic steering controller sets the automatic steering control amount using both a target automatic steering angle and the actual automatic steering angle.
The patent also describes additional features of the motor control device. For example, it includes an actual manual steering angle calculating portion that determines the steering angle resulting from manual steering and assist control. This is achieved by subtracting the actual manual steering angle from the actual steering angle. The actual manual steering angle is calculated using a reference model of the steering system, which includes the electric motor.
Furthermore, the motor control device incorporates various weighting portions that perform weighting processes on the assist control amount, the actual manual steering angle, and the automatic steering control amount. These weighting processes are based on predetermined information and help optimize the control of the electric motor.
Overall, this patent presents a motor control device that aims to enhance steering control in vehicles. By combining various control amounts and utilizing advanced calculations, the device provides improved automatic and manual steering capabilities.
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