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    Static inverter
    1.
    发明授权
    Static inverter 失效
    静态逆变器

    公开(公告)号：US3914680A

    公开(公告)日：1975-10-21

    申请号：US54186775

    申请日：1975-01-17

    Applicant: GEN ELECTRIC

    Inventor： HESLER JOSEPH P ,  KORZEKWA SAMUEL M

    IPC: H02M7/5383 ,  H02M7/53846 ,  H02M7/53862 ,  H02M7/48

    CPC classification number: H02M7/53862 ,  H02M7/53846

    Abstract: A static inverter is disclosed for d.c. to a.c. conversion comprising a pair of switching semiconductor devices and a power transformer having primary, secondary and feedback windings associated with a linear magnetic core. A small perforation partitions the core into two localized branches at the same time forming a small magnetic loop encircling the perforation. Both power windings encircle the full core, while the feedback windings are associated with one of the branches. One branch is designed to saturate before the other branch and thus before full core saturation. Saturation of one branch affects the feedback derived in a winding encircling either branch - decreasing the feedback in the winding encircling the saturated branch and increasing the feedback in the winding encircling the branch remaining unsaturated. The arrangement permits cyclical control of the feedback to avoid full core saturation and thus avoids overstressing the switching devices. The feedback windings are typically single turn windings. The introduction of an additional single turn primary winding connected in the primary power circuit creates a virtual current transformer utilizing the small magnetic loop which makes the feedback drive proportional to load current. The arrangement is reliable and economical in its use of materials.

    Abstract translation: 公开了一种静态逆变器，用于直流 到a.c. 转换器包括一对开关半导体器件和具有与线性磁芯相关的初级，次级和反馈绕组的电力变压器。 小的穿孔将芯分成两个局部分支，同时形成一个环绕穿孔的小磁环。 两个功率绕组环绕整个芯，而反馈绕组与其中一个分支相关联。 一个分支设计成在另一个分支之前饱和，从而在全核饱和之前饱和。 一个分支的饱和影响环绕任一分支的绕组中产生的反馈 - 减小围绕饱和分支的绕组中的反馈，并增加围绕分支保持不饱和的绕组中的反馈。 该布置允许反馈的周期性控制以避免全核饱和，并且因此避免了对开关器件的过应力。 反馈绕组通常是单匝绕组。 引入连接在主电源电路中的附加单匝初级绕组产生利用小磁环的虚拟电流互感器，其使得反馈驱动与负载电流成比例。 该装置在使用材料方面是可靠和经济的。

    Active filter circuit having nonlinear properties
    4.
    发明授权
    Active filter circuit having nonlinear properties 失效
    具有非线性特性的主动滤波电路

    公开(公告)号：US3654563A

    公开(公告)日：1972-04-04

    申请号：US3654563D

    申请日：1965-10-15

    Applicant: GEN ELECTRIC

    Inventor： HESLER JOSEPH P ,  MCFADYEN ROBERT J ,  SCHLERETH FRITZ H

    IPC: H03G9/02 ,  H03H11/04 ,  H03F21/00

    CPC classification number: H03H11/0405 ,  H03G9/025

    Abstract: An active filter for improving both frequency and noise characteristics of an incoming signal. The filter is a closed loop circuit having a nonlinear network and an integrating network in the feedthrough path and a filter network in the feedback path. In the presence of a rapidly changing input signal the circuit closed loop response peaks over a relatively wide band of higher frequencies for accepting high frequency components of the input signal, while in the presence of noise the closed loop response exhibits a restricted bandwidth.

    Abstract translation: 一个有源滤波器，用于提高输入信号的频率和噪声特性。 滤波器是具有非线性网络和馈通路径中的集成网络以及反馈路径中的滤波器网络的闭环电路。 在存在快速变化的输入信号的情况下，电路闭环响应在较高频率的相对宽的频带上峰值，用于接收输入信号的高频分量，而在存在噪声的情况下，闭环响应呈现受限带宽。

    SMOKE DETECTOR
    6.
    发明专利
    SMOKE DETECTOR 未知

    公开(公告)号：CA1079417A

    公开(公告)日：1980-06-10

    申请号：CA287906

    申请日：1977-09-29

    Applicant: GEN ELECTRIC

    Inventor： HESLER JOSEPH P

    IPC: G01N27/64 ,  G08B17/10 ,  G08B17/11 ,  A62C39/02

    Abstract: A smoke detector comprising a smoke detection cell of the ionization type and an electircal network providing for a.c. operation of the detection cell is described. The impedance of the detection cell changes in the presence of airborne combustion products and alters the operating frequency of the network. The frequency change is sensed to actuate an alarm, A.C. operation avoids the problem of d.c. instability in the high inpedance detection cell circuit and simplifies sensing the electrical condition of the detection cell. The electrical network typically uses MOS-FET devices as the active circuit elements.

    STATIC INVERTER EMPLOYING AN ASSYMETRICALLY ENERGIZED INDUCTOR
    8.
    发明专利
    STATIC INVERTER EMPLOYING AN ASSYMETRICALLY ENERGIZED INDUCTOR 未知

    公开(公告)号：CA1144599A

    公开(公告)日：1983-04-12

    申请号：CA338032

    申请日：1979-10-19

    Applicant: GEN ELECTRIC

    Inventor： HESLER JOSEPH P ,  KORZEKWA SAMUEL M ,  MCFADYEN ROBERT J

    IPC: H02M7/537 ,  H02M7/48

    Abstract: 35-EL-1353 A STATIC INVERTER EMPLOYING AN ASSYMETRICALLY ENERGIZED INDUCTOR A static inverter employing an inductor and an electrical gain element for intermittent assymetric energization of the inductor from a dc source is described. Reliable intermittent operation of the gain element, typically a power transistor, is achieved by use of three feedback windings which in response to saturation of a branch of the core of the inductor but before full core saturation, discontinue regenerative feedback and then apply degenerative feedback. This turn off mechanism protects the transistor from high current stresses. Passive means are provided such as a capacitor for momentarily storing the energy or diode means for coupling the energy back to the source or to the load to protect the transistor from the high voltage surge and the energy release when current flow in the inductor is interrupted. Energy stored in the capacitor may be used for transistor commutation.

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