Controller for ac rotary electric machine and electric power steering apparatus

    公开(公告)号:US12132423B2

    公开(公告)日:2024-10-29

    申请号:US18000902

    申请日:2020-06-18

    摘要: To provide a controller for AC rotary electric machine which can suppress the increase in the unwanted sound while reducing noise. A controller for AC rotary electric machine switches n pieces of zero phase candidate voltage values in order for every switching period and calculate as a zero phase voltage value; by defining a deviation between the zero phase voltage value and a time lag zero phase voltage value delaying by a j times value of the switching period, as a zero phase time lag deviation value; j is a natural number which minimizes a difference between a half period of a mechanical resonance period, and the j times value of switching period; an effective value of the zero phase time lag deviation value becomes small, compared with an effective value of AC component of the zero phase voltage value.

    Steering control device and method

    公开(公告)号:US12128965B2

    公开(公告)日:2024-10-29

    申请号:US18094345

    申请日:2023-01-07

    发明人: KwangHyung Lee

    IPC分类号: B62D5/00 B62D5/04 B62D6/00

    CPC分类号: B62D5/006 B62D5/003 B62D6/008

    摘要: The disclosure relates to a steering control device and method. Specifically, according to the disclosure, a steering control device comprises a first steering control module controlling a first reaction force motor to generate a reaction force torque for a steering wheel through a first inverter and a second steering control module controlling a second reaction force motor to generate a reaction force torque for the steering wheel through a second inverter. The first steering control module or the second steering control module generates the reaction force torque by conducting one of the first inverter and the second inverter when the first inverter and the second inverter fail.

    STEERING SYSTEM FOR USE IN TEST DRIVING OF AN AUTONOMOUS VEHICLE AND DISENGAGEMENT METHOD

    公开(公告)号:US20240343293A1

    公开(公告)日:2024-10-17

    申请号:US18577835

    申请日:2022-06-28

    申请人: aiMotive Kft.

    发明人: Roland Kohári

    IPC分类号: B62D1/28 B62D5/04

    CPC分类号: B62D1/286 B62D5/046

    摘要: The invention is a steering system for use in test driving of an autonomous vehicle, comprising—a manual steering means configured to manually steer the vehicle, —a steering axle (30) attached to the manual steering means, and—a direct drive motor (35) controllably affecting a torque on the steering axle (30), wherein the direct drive motor (35) has an axis (37) of rotation being coaxial with the steering axle (30). The steering system is characterized in that—it has at least two predefined states characterizing different driving conditions, wherein each predefined state has at least one predefined disengagement limit, and—it further comprises a controller assembly operable based on a control parameter, the controller assembly being configured to detect an actual predefined state of the vehicle, and the controller assembly initiates a disengagement of the direct drive motor (35) if, based on a difference value between a prescribed value of the control parameter and an actual value of the control parameter, the at least one predefined disengagement limit corresponding to the actual predefined state is reached. The invention further relates to a disengagement method, and a data processing system, a computer program product and a computer readable medium carrying out the method.

    Steering device
    6.
    发明授权

    公开(公告)号:US12116054B2

    公开(公告)日:2024-10-15

    申请号:US17429703

    申请日:2019-12-16

    摘要: A steering device includes: a steering mechanism including a steering shaft, and a transmitting mechanism; and a controller including a first hydraulic passage state judging section, a first electric motor control section, and a second electric motor control section; the first hydraulic passage state judging section configured to judge a state of the hydraulic fluid in a first hydraulic passage in which the hydraulic fluid discharged from the first pump flows, the first electric motor control section configured to control and drive the first electric motor based on a driving state of a vehicle, and the second electric motor control section configured to increase a rotation number of the second electric motor when the first hydraulic passage state judging section judges that a supply of the hydraulic fluid in the first hydraulic passage is deficient.

    Electric commercial vehicle power steering system with a globoidal wormgearing

    公开(公告)号:US12110067B2

    公开(公告)日:2024-10-08

    申请号:US17139186

    申请日:2020-12-31

    发明人: Kevin Boyle

    摘要: An electric commercial vehicle power steering system includes an input shaft, an electric motor, and a planetary gear set, a drive coupling, and an output shaft. A first one of a sun gear, a planet carrier, and a ring gear of the planetary gear set is connected to and rotatable with a rotor of the electric motor, and a second one of the sun gear, the planet carrier, and the ring gear of the planetary gear set is connected to and rotatable with a first gear of the drive coupling. A second gear of the drive coupling is connected to and rotatable with the input shaft. A globoidal worm drive is arranged between the input shaft and the output shaft. The globoidal worm drive couples the input shaft to the output shaft such that the output shaft is rotatable with the input shaft via the globoidal worm drive.

    POWER SOURCE CONTROL CIRCUIT AND POWER STEERING SYSTEM

    公开(公告)号:US20240326900A1

    公开(公告)日:2024-10-03

    申请号:US18576879

    申请日:2021-07-12

    IPC分类号: B62D5/04 H02M3/158

    摘要: A power source control circuit and a power steering system are provided. The power source control circuit comprises: a signal input circuit that includes at least two input ends, and each of the at least two input ends is used for collecting a first control signal which indicates whether an external device corresponding to the input end is abnormal; and a control circuit that is used for generating, according to the first control signals collected by each of the at least two input ends, a second control signal, which is used for controlling the turning-off of a power source.