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    Motor control for controlling both armatures and field circuits
    63.
    发明授权
    Motor control for controlling both armatures and field circuits 失效
    用于控制电枢和励磁电路的电机控制

    公开(公告)号：US3378746A

    公开(公告)日：1968-04-16

    申请号：US41280964

    申请日：1964-11-20

    申请人： GEN ELECTRIC

    发明人： WEISER EARNEST F

    IPC分类号： B60L15/28 ,  B60L11/18 ,  H02J7/24 ,  H02P3/14 ,  H02P7/298

    CPC分类号： B60L11/1805 ,  H02J7/247 ,  H02P3/14 ,  H02P7/298 ,  Y02T10/646 ,  Y02T10/648 ,  Y02T10/7005 ,  Y02T10/7258 ,  Y02T10/92 ,  Y10S388/92 ,  Y10S388/93

    摘要： 1,121,941. Control of D.C. motors; battery charging. GENERAL ELECTRIC CO. 2 Nov., 1965 [20 Nov., 1964], No. 46438/65. Headings H2H and H2J. The armature 2 of a D.C. motor is supplied from battery 4 through silicon controlled rectifiers 6 having a gating circuit 26 comprising a unijunction transistor oscillator whose frequency depends upon the rate of charging of capacitor 35. A transistor 36 is connected to the capacitor and is controlled by voltage divider 41 actuated by pedal 44. A quenching circuit for the rectifiers 6 comprises capacitor 24 associated with rectifier 12 and saturable transformer 20, 21, the pulses applied to armature 2 having a uniform duration but variable repetition rate. Inductor 53 maintains the armature current during the off-periods of the pulses. The armature current is detected by circuit 90 and used to control the excitation of shunt field winding 3. As the voltage across resistor 108 increases, transistor 91 is rendered more conductive than transistor 92 so reducing the current passed by transistor 114. Transistor 82 is rendered more conductive to charge capacitor 31 at a greater rate and fire unijunction transistor 70 more frequently. This increases the average current passing through rectifier 57 to the field winding 3. The rectifier 57 has a quenching circuit comprising capacitor 59 and saturable transformer 63, 64, overshoot of the capacitor voltage being prevented by diode 65 Regenerative braking operation is introduced when voltage divider 111 is set to reduce the current through transistor 92, so increasing the motor flux and providing regenerative charging of battery 4. Change-over of switches 125, 126, 127, causes the battery to be charged from source 130 through rectifier 129, the operation of circuits 5, 26, being the same as for motoring. If the charging current becomes excessive, diode 120 breaks down and biases transistor 122 to limit the charging rate of capacitor 35. The diode 120 also breaks down if the battery voltage becomes excessive. The motor is reversed by switch 143 energizing relay 146 or relay 147. Reversal is prevented if the motor speed is above a low value, the relays 146, 147 being interlocked and subjected to the back E.M.F. through diode 157.