STEPPING MOTOR DRIVE DEVICE
    44.
    发明公开

    公开(公告)号:EP4203297A1

    公开(公告)日:2023-06-28

    申请号:EP21872271.8

    申请日:2021-09-14

    IPC分类号: H02P8/12

    摘要: A stepping motor driver which drives a stepping motor according to a position angle command includes: a current detector that detects a phase current; an inverter that applies a current to a winding; and a control unit that controls the inverter. The control unit includes: a phase current coordinate transformer that transforms the phase current to generate a dp-axis detection current and a qp-axis detection current; a torque correction command generator that generates a torque correction command according to a torque correction waveform for suppression of torque fluctuation; a torque correction command coordinate transformer that transforms the torque correction command into a dp-axis component and a qp-axis component to generate a dp-axis torque correction component and a qp-axis torque correction component; an adder that superposes the dp-axis torque correction component and the qp-axis torque correction component respectively on a dp-axis fundamental current command and a qp-axis fundamental current command to generate a dp-axis current command and a qp-axis current command; and a control command generator that compares the dp-axis detection current and the qp-axis detection current respectively with the dp-axis current command and the qp-axis current command and applies a control command to the inverter.

    CONTROL DEVICE FOR STEPPING MOTOR
    45.
    发明公开

    公开(公告)号:EP4131768A1

    公开(公告)日:2023-02-08

    申请号:EP21780328.7

    申请日:2021-03-02

    IPC分类号: H02P8/12 H02P8/14 H02P8/22

    摘要: A stepping motor control device is provided, which controls a stepping motor including a rotor position detector by micro-step driving. The control device has a plurality of operation modes including an adjustment mode and a use mode. In the adjustment mode, the control device generates control data for a closed loop control for controlling the winding current of the stepping motor based on the detection value of the rotor position detector, and performs a stepping motor acceleration operation and a stepping motor deceleration operation according to the control data. In the use mode, the control device performs the stepping motor acceleration operation and the stepping motor deceleration operation so that a winding current observed in the adjustment mode is reproduced by an open loop control for controlling the winding current of the stepping motor based on the control data generated in the adjustment mode.

    MOTOR CONTROL DEVICE AND FEEDER
    48.
    发明公开

    公开(公告)号:EP3582390A1

    公开(公告)日:2019-12-18

    申请号:EP17895988.8

    申请日:2017-02-09

    申请人: Fuji Corporation

    IPC分类号: H02P8/12 H05K13/02

    摘要: The motor control device is capable of driving control of the stepping motor with a pre-excitation that excites the stepping motor for a first time with a current lower than that during driving before starting or when starting driving the stepping motor, and a post-excitation that excites the stepping motor at a current lower than that during driving when stopping or after stopping the driving of the stepping motor for a second time, and is capable of continuing the post-excitation and the pre-excitation for a period of time shorter than the sum of the first time and the second time when the post-excitation at the previous stopping of driving of the stepping motor and the pre-excitation at the next starting of driving of the stepping motor are executed without passing through the non-excited state.