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    Logic circuitry for providing stopping control for stepping motors
    2.
    发明授权
    Logic circuitry for providing stopping control for stepping motors 失效
    提供步进电机停机控制的逻辑电路

    公开(公告)号：US3636429A

    公开(公告)日：1972-01-18

    申请号：US3636429D

    申请日：1970-05-08

    Applicant: IBM

    Inventor： JAKUBOWSKI MAREK ,  PAWLETKO JOSEPH P

    IPC: H02P8/32 ,  G05B19/40

    CPC classification number: H02P8/32

    Abstract: The invention is concerned with circuitry for providing a sequence of stopping pulses derived from motor feedback pulses. It includes means for providing an initial stop pulse which reverses the phase of the motor to thereby develop a negative torque. Intermediate stopping pulses in the form of feedback pulses continue to apply the negative torque to the rotor. A final stopping pulse not derived from the feedback pulses is applied to bring the motor to its equilibrium position. In this manner, a stepping motor can be stopped with substantially no oscillations after a specified number of steps.

    Stepping motor constant velocity drive including closed and open loop control
    3.
    发明授权
    Stepping motor constant velocity drive including closed and open loop control 失效
    步进电机恒定速度驱动，包括闭合和开环控制

    公开(公告)号：US3601678A

    公开(公告)日：1971-08-24

    申请号：US3601678D

    申请日：1970-05-27

    Applicant: IBM

    Inventor： ABRAHAM DENNIS G ,  DOHANICH GEORGE J ,  PAWLETKO JOSEPH P

    IPC: H02P8/14 ,  G05B19/40

    CPC classification number: H02P8/14

    Abstract: A stepping motor drive which includes both a closed loop feedback control system and an open loop oscillator control system. The stepping motor is started by a start pulse, and feedback pulses from an emitter driven by the motor are gated to accelerate the motor. At the same time, the feedback pulses are gated to reset and synchronize a free-running oscillator. Feedback and oscillator pulses are compared, and when synchronism is achieved, i.e., the motor is up to speed, the oscillator pulse gate drive is enabled. When this occurs, the oscillator is controlled by a discriminator which compares the phase of the oscillator and feedback pulses and corrects the relation therebetween by modifying the oscillator frequency.

    Variable reluctance linear stepper motor
    4.
    发明授权
    Variable reluctance linear stepper motor 失效
    可变磁阻线性步进电机

    公开(公告)号：US3867676A

    公开(公告)日：1975-02-18

    申请号：US39922573

    申请日：1973-09-20

    Applicant: IBM

    Inventor： CHAI HI D ,  PAWLETKO JOSEPH P

    IPC: H02K37/00 ,  B41J19/30 ,  H02K41/03 ,  H02P6/00 ,  H02P25/08 ,  H02K41/00

    CPC classification number: H02P25/08 ,  B41J19/305 ,  H02K41/03 ,  H02P6/006

    Abstract: The poles of a variable reluctance type linear stepper motor are arranged in an odd plural number of pairs and each pole is provided with two windings. For each pole pair, one winding of the pole of the particular pair is connected in series-aiding relationship with one of the windings of the other pole of the pair. The other two windings of the particular pair of poles are also connected in series-aiding relationship. The series connected windings are selectively energizable in predetermined stepping sequences for single phase, double phase and alternate single and double phase energizing operational modes. As a result, relative motion is provided between the pole structure of the motor and its variable reluctance member. The directions of energization of the respective two series connected windings of each particular pole pair are in opposition with respect to each other. The energization is such that the change of direction of the flux through the poles is minimized between steps, thereby providing a concomitant reduction in electrical and/or heat losses.

    Abstract translation: 可变磁阻型线性步进电机的极点以奇数对配置，每个极设有两个绕组。 对于每个极对，特定对的极的一个绕组与该对的另一个极的一个绕组串联连接。 特定对极的另外两个绕组也是串联的关系。 串联的绕组可以按照预定的步进顺序选择性地供电，用于单相，双相和交替的单相和双相通电操作模式。 结果，在电机的极结构和其可变磁阻部件之间提供相对运动。 每个特定极对的相应的两个串联的绕组的通电方向相对于彼此相对。 通电使得通过极的通量的方向的变化在步骤之间最小化，从而提供电和/或热损失的伴随的减少。

    Stepping motor control system using pulse injection
    5.
    发明授权
    Stepping motor control system using pulse injection 失效
    使用脉冲注入的步进电机控制系统

    公开(公告)号：US3694725A

    公开(公告)日：1972-09-26

    申请号：US3694725D

    申请日：1969-12-29

    Applicant: IBM

    Inventor： ABRAHAM DENNIS G ,  PAWLETKO JOSEPH P

    IPC: H02P8/00 ,  G05B19/40 ,  H02P8/24

    CPC classification number: H02P8/24

    Abstract: Single step operation of a stepping motor and deceleration of the stepping motor utilized in a closed-loop mode are obtained utilizing a pulse injection arrangement in which a suitable plurality of pulses are supplied in rapid succession to the drive circuits for the stepping motor in order to quickly step the magnetic fields to the proper condition at a rate too fast for the rotor to follow.

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