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    Step motor drive circuit
    3.
    发明授权
    Step motor drive circuit 失效
    步进电机驱动电路

    公开(公告)号：US3659177A

    公开(公告)日：1972-04-25

    申请号：US3659177D

    申请日：1970-09-11

    Applicant: GEN MOTORS CORP

    Inventor： GELENIUS ROBERT B

    IPC: H02P8/14 ,  H02K37/00

    CPC classification number: H02P8/14

    Abstract: A step motor drive circuit for use with a step motor of the type having three ''''wye'''' connected field coils, each of which is connected across a source of direct current supply potential through the collector-emitter electrodes of a respective transistor. The emitter-base electrodes of each transistor are connected across the source of direct current supply potential through a respective diode, a common series capacitor and a common electrical switch and also through the parallel combination of the other two motor field coils, each having a diode connected in series therewith which becomes reverse biased while the transistor through which that field coil is energized is conductive to interrupt that branch of the parallel combination. Circuitry responsive to the triggering of each not conductive transistor conductive upon each closure of the electrical switch for extinguishing the earlier conductive transistor of the other two is provided whereby each transistor is maintained not conductive while the other two transistors are conductive and each not conductive transistor is triggered conductive and the earlier conductive transistor of the other two transistors is extinguished upon each closure of the electrical switch.

    Abstract translation: 一种步进电动机驱动电路，其与具有三个“Y”“连接的励磁线圈类型的步进电动机一起使用，每个电场线圈通过相应晶体管的集电极 - 发射极电极跨越直流电源电源连接。 每个晶体管的发射极 - 基极通过相应的二极管，公共串联电容器和公共电开关连接在直流电源的两端，并且还通过其它两个电动机励磁线圈的并联组合，每个具有二极管 与其串联连接，其变为反向偏置，而该励磁线圈通电的晶体管是导通的，以中断该并联组合的分支。 提供响应于每个不导电晶体管的触发导通的电路，其中每个闭合电开关用于熄灭另外两个的较早的导电晶体管，由此每个晶体管保持不导通，而另外两个晶体管是导电的，并且每个不是导电晶体管是 触发导通，并且另外两个晶体管的较早的导电晶体管在电开关的每次闭合时熄灭。

    Wide-angle two-coil electrical gauge
    4.
    发明授权
    Wide-angle two-coil electrical gauge 失效
    宽角双线圈电度表

    公开(公告)号：US3636447A

    公开(公告)日：1972-01-18

    申请号：US3636447D

    申请日：1970-05-06

    Applicant: GEN MOTORS CORP

    Inventor： GELENIUS ROBERT B

    IPC: G01D5/20 ,  G01P3/44 ,  G01R1/38 ,  G01R5/16 ,  G01R7/00 ,  G01R7/06 ,  G01R19/00 ,  G01R1/20

    CPC classification number: G01R7/06 ,  G01P1/08

    Abstract: A wide-angle electrical gauge having two coils whose magnetic axes are at right angles. A signal source supplies a signal whose magnitude is proportional to the magnitude of the condition to be indicated. A sine generator is responsive to the output of the signal source and controls the current through one of the coils in a manner such that the magnetic field along its magnetic axis varies in an approximated sinusoidal fashion. A cosine generator is responsive to the output of the signal source and controls the current through the remaining coil in a manner so as to generate a magnetic field along its magnetic axis which is phase shifted from the magnetic field generated by the sine generator so as to take the form of an approximated cosine waveform in relationship thereto. A magnetic armature aligns itself with the resultant of the two magnetic fields whose angular position corresponds to the magnitude of the condition being measured.

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