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    Direct current energized synchronous motor system
    1.
    发明授权
    Direct current energized synchronous motor system 失效
    直流励磁同步电机系统

    公开(公告)号：US3895273A

    公开(公告)日：1975-07-15

    申请号：US44877774

    申请日：1974-03-06

    申请人： PARKER LOUIS W

    发明人： PARKER LOUIS W

    IPC分类号： H02K29/06 ,  H02P6/14 ,  H02K29/00

    CPC分类号： H02K29/06 ,  H02P6/14

    摘要： A synchronous motor system comprises an axial airgap motor employing a pair of wound end rotors having at least one stator therebetween. The stator comprises a plurality of separate windings of different phases each of which is connected to a direct current power source through an inverter comprising a plurality of selectively energizable silicon controlled rectifiers connected to the plurality of different phase windings respectively. Cyclically operable means are provided for activating different ones of the rectifiers in sequence to effect current flow from the direct current source through different ones of the stator windings in sequence. The stator defines a plurality of poles for each phase, and each pole takes the form of a plurality of adjacent stator segments which carry a given phase winding thereon and which also carry the windings of the other phases thereon, in asymmetrical relation to one another. When current is flowing through a winding of given phase via a given activated rectifier in the inverter, subsequent activation of a different one of the rectifiers produces a current flow through the winding of a different phase to produce an effective rotation of the stator field; and, due to the asymmetrical winding relationship employed, when current flows in said different phase, the current flow in turn induces a potential in the winding of the given phase which has a magnitude and polarity operative to turn off a conducting silicon controlled rectifier connected to the winding of said given phase. The rotor of the motor is energized by direct current and preferably employs a number of rotor pole segments equal to the number of stator pole segments to effectively increase the average torque of the motor.

    摘要翻译： 同步电动机系统包括采用一对绕组端转子的轴向气隙电动机，它们之间具有至少一个定子。 定子包括多个不同相的分离绕组，每个绕组分别通过一个逆变器连接到直流电源，逆变器包括分别连接到多个不同相绕组的多个选择性激励的可控硅整流器。 提供了可循环操作的装置，以顺序地激活不同的整流器，以使电流从直流源依次通过不同的定子绕组。 定子限定了每个相的多个极，并且每个极呈多个相邻的定子段的形式，该相邻的定子段在其上承载给定的相绕组，并且彼此之间以非对称关系承载其它相的绕组。 当电流通过在逆变器中的给定的激活的整流器流过给定相的绕组时，不同的整流器的后续激活产生通过不同相的绕组的电流，以产生定子磁场的有效旋转; 并且由于所采用的不对称绕组关系，当电流在所述不同相中流动时，电流又依次在给定相的绕组中引起电位，其具有幅度和极性，可操作地关闭连接到 所述给定阶段的卷绕。 电动机的转子由直流电通电，并且优选采用等于定子极段数的多个转子极段，以有效地增加电动机的平均转矩。

    Muter for television receivers
    4.
    发明授权
    Muter for television receivers 失效
    电视接收器多

    公开(公告)号：US3621125A

    公开(公告)日：1971-11-16

    申请号：US3621125D

    申请日：1970-10-05

    申请人： PARKER LOUIS W ,  PARKER ELECTRONICS INC

    发明人： PARKER LOUIS W

    IPC分类号： H04N5/50 ,  H04N5/62

    CPC分类号： H04N5/50

    摘要： An intercarrier television receiver is provided with an audio amplifier normally biased beyond cutoff. A tuned circuit, separate from the intercarrier sound system of the receiver, is sharply tuned to the intercarrier frequency for selectively producing a control signal operative to unlock the audio amplifier. Limiters are provided to prevent unlocking of the audio amplifier in response to excessive noise pulses, and to maintain the control signal at a steady value regardless of changes in amplitude of the received signal.