公开(公告)号：US20250010915A1

公开(公告)日：2025-01-09

申请号：US18754625

申请日：2024-06-26

Applicant: NIDEC CORPORATION

Inventor： Shuji ENDO ,  Sohei MIYAKE ,  Daisuke NOTSU

IPC: B62D15/02 ,  B62D6/00

Abstract: A control device that controls a steering mechanism mounted on a vehicle includes a first assist controller to execute lane keeping control and generate a first input value. The first assist controller includes a vehicle state calculator to calculate a yaw rate target value and lateral displacement, a yaw rate controller to generate a yaw rate command value based on the yaw rate target value, and a lateral displacement controller to generate a lateral displacement command value based on the lateral displacement. The yaw rate controller includes a yaw rate adjuster to adjust the yaw rate command value according to a frequency. The lateral displacement controller includes a lateral displacement adjuster to adjust the lateral displacement command value according to a frequency.

公开(公告)号：US20230202559A1

公开(公告)日：2023-06-29

申请号：US18086309

申请日：2022-12-21

Applicant: Nidec Corporation

Inventor： Shuji ENDO ,  Sohei MIYAKE ,  Masaya ISHIKAWA ,  Daisuke NOTSU

IPC: B62D6/00 ,  B62D5/04

CPC classification number: B62D6/008 ,  B62D5/0469

Abstract: A control device includes a reaction force controller to generate an input torque input to a control target and control a reaction force transmitted to a steering person and an assist controller to generate a correction torque to correct the input torque based on an output of the control target and a nominal model. The assist controller includes a high-pass filter with a first cutoff frequency, a low-pass filter with a second cutoff frequency higher than the first cutoff frequency, and a disturbance compensation value calculator. When a transfer function of the low-pass filter is Q(s) and a transfer function of the high-pass filter is HPF(s), a transfer function of a control target is constrained by a transfer function of the nominal model in a frequency band in which a gain in a gain characteristic of Q(s)·HPF(s) is 1.

公开(公告)号：US20230100977A1

公开(公告)日：2023-03-30

申请号：US17949348

申请日：2022-09-21

Applicant: Nidec Corporation

Inventor： Shuji ENDO ,  Sohei MIYAKE

IPC: B62D5/04

Abstract: A motor control device includes a model following controller to generate a correction torque based on an output from a control target that is a motor, and correct an input to the control target with the correction torque. A model following controller includes a high-pass filter with a first cutoff frequency and a low-pass filter with a second cutoff frequency larger than the first cutoff frequency, and is configured or programmed so that a transfer function of a control target is constrained to a nominal model in a frequency band in which a gain in a gain characteristic of Q(s)·HPF(s) is 1 where Q(s) is a transfer function of the low-pass filter and HPF(s) is a transfer function of the high-pass filter.

公开(公告)号：US20210067080A1

公开(公告)日：2021-03-04

申请号：US16961262

申请日：2018-11-20

Applicant: Nidec Corporation

Inventor： Shuji ENDO ,  Kaori NABESHI

IPC: H02P25/22 ,  H02P27/08 ,  B62D5/04

Abstract: A power conversion device includes a first inverter, a second inverter, and a control circuit that performs Pulse Width Modulation (PWM) control of switching elements of the first and second inverters according to at least one switching scheme. For an H bridge of each phase, the control circuit performs PWM control according to at least one switching scheme that turns on a high-side switching element in one of a pair of legs and switches a low-side switching element in another of the pair of legs, or turns on a low-side switching element in one of the pair of legs and switches a high-side switching element in another of the pair of legs.

公开(公告)号：US20210006188A1

公开(公告)日：2021-01-07

申请号：US16770184

申请日：2018-11-22

Applicant: NIDEC CORPORATION ,  NIDEC ELESYS CORPORATION

Inventor： Shuji ENDO ,  Hajime NAKANE ,  Takuya YOKOZUKA ,  Mikio MORISHIMA ,  Tokuji TATEWAKI

IPC: H02P21/05 ,  H02P21/08 ,  H02P21/13 ,  H02P21/22 ,  H02P27/12 ,  B62D5/04

Abstract: A technique for reducing an operation noise even when a high-pass filter is used for controlling a motor is provided. A controller is used in a motor control system for driving a motor used for position control by using a drive circuit and an inverter. The controller includes a current control block for receiving a motor current and outputting a reference voltage, a motor control circuit for outputting a signal indicating a duty ratio from the reference voltage output from the current control block, a dead band compensation block for calculating a compensation value of a non-linear element of a drive system, and an adder. The dead band compensation block outputs a duty value corresponding to the dead band at a timing at which the motor current crosses zero. The adder adds the duty value to a signal indicating the duty ratio and outputs the signal.

公开(公告)号：US20220289275A1

公开(公告)日：2022-09-15

申请号：US17632380

申请日：2020-08-06

Applicant: Nidec Corporation

Inventor： Shuji ENDO ,  Hiroyuki ISHIMURA

IPC: B62D5/04 ,  B62D6/02

Abstract: 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.

公开(公告)号：US20220185370A1

公开(公告)日：2022-06-16

申请号：US17547150

申请日：2021-12-09

Applicant: NIDEC CORPORATION

Inventor： Shuji ENDO ,  Masaya ISHIKAWA ,  Hiroaki MIZUSHIMA

IPC: B62D15/02 ,  H02P21/22 ,  H02P25/22 ,  H02P27/12 ,  H02P29/028 ,  B62D5/04

Abstract: To improve steering feeling felt by a driver, a motor control device includes a processor and a memory which stores a program for controlling an operation of the processor. According to the program, the processor executes: switching from n-phase (n is an integer of three or more) energization control to n−1 phase energization control in response to a switching signal; acquiring a torque command value, an electrical angle of a motor, and an actual current value of the motor; generating a pre-current command value on the basis of the torque command value, the electrical angle of the motor, and the actual current value of the motor which are acquired; generating a current command value by applying dither control to the pre-current command value in a dead point range of an electrical angle range from 0 to 2π; and performing the n−1 phase energization control on the basis of the current command value.

公开(公告)号：US20200377144A1

公开(公告)日：2020-12-03

申请号：US16970950

申请日：2019-02-13

Applicant: NIDEC CORPORATION ,  NIDEC ELESYS CORPORATION

Inventor： Shuji ENDO ,  Tokuji TATEWAKI ,  Tomoya UEDA ,  Masanori WATAHIKI ,  Tomonari MORI

IPC: B62D5/04 ,  H02P6/10

Abstract: A motor control system includes an inverter, and a control calculation unit that feedback-controls the inverter. The control calculation unit includes a voltage control calculation unit that calculates a voltage command value indicating a voltage to be applied to the motor from the inverter on the basis of a current deviation between a current command value and an actual current detection value, a torque ripple compensation calculation unit that adds a compensation value for compensating a torque ripple in the motor to a signal value on at least one of an upstream side and a downstream side in a signal flow that passes through the voltage control calculation unit, and a current limit calculation unit that limits the current command value by adaptive control based on an actual angular velocity value indicating an angular velocity at which the motor rotates.

公开(公告)号：US20200251966A1

公开(公告)日：2020-08-06

申请号：US16649155

申请日：2018-10-05

Applicant: Nidec Corporation

Inventor： Shuji ENDO ,  Hiromitsu OHASHI

IPC: H02K11/33 ,  H02K9/22 ,  B62D5/04

Abstract: A motor module includes a motor including n-phase windings where n is 3 or more, a first circuit boar, a first inverter mounted on the first circuit board and connected to the windings, a first passive element group mounted on the first circuit board, a first heat sink in thermal contact with the first circuit board, a second circuit board, a second inverter mounted on the second circuit board and connected to the windings, and a second passive element group mounted on the second circuit board. A first passive element having a highest height in the first passive element group and a second passive element having a highest height in the second passive element group are located between the first circuit board and the second circuit board, and do not overlap each other when viewed along a direction of a rotation axis of a rotor of the motor.

公开(公告)号：US20230100945A1

公开(公告)日：2023-03-30

申请号：US17949264

申请日：2022-09-21

Applicant: Nidec Corporation

Inventor： Shuji ENDO ,  Sohei MIYAKE

IPC: B62D5/04 ,  G05B19/4155

Abstract: A motor control device includes a torque controller to operate based on a steering torque and to give an input to a control target that is a motor, and a model following controller to generate a first correction torque based on an output from the control target. A model following controller includes a high-pass filter to remove a low frequency component from a first correction torque, a friction compensation calculator that is coupled in parallel to the high-pass filter to apply friction compensation to the first correction torque to calculate an estimated value of a mechanical friction torque, and an adder to add the estimated value of the friction torque to the first correction torque from which the low frequency component is removed by the high-pass filter to generate a second correction torque and feed back the second correction torque to an input to the control target.