公开(公告)号：EP0002339B1

公开(公告)日：1983-11-30

申请号：EP78300667.9

申请日：1978-11-24

申请人： GOULD INC.

发明人： Bowers, John J. ,  Lecklider, Thomas H.

IPC分类号： G06F3/14

CPC分类号： G09G1/162 ,  G01R13/408

公开(公告)号：EP0080278A1

公开(公告)日：1983-06-01

申请号：EP82305815.1

申请日：1982-11-02

申请人： Energy Development Associates Inc.

发明人： Galloway, James Howard

IPC分类号： H02P7/28 ,  B60L11/18

CPC分类号： B60L11/1805 ,  Y02T10/7005 ,  Y02T10/7258

摘要： A device for controlling the D.C. drive motor of a battery powered motor vehicle having an on-board storage battery, which motor has an armature and a separately excited field winding. This control device includes means for sensing the current flow (122) through the armature, means for creating an armature current signal indicative of the sensed armature current (124), means for creating a reference signal indicative of a desired speed of the vehicle (110), comparison means for creating an error signal indicative of the relationship between the armature current signal and the reference signal (120), means for controlling the voltage applied across the armature in accordance with the error signal (140) and means responsive to the error signal for varying the voltage across the field winding in accordance with the error signal when the error signal exceeds a preselected value (172). In this device there is provided an improvement including means for controlling the voltage across the field winding in accordance with the reference signal at least during a period that the error signal is below a preselected value. In this manner, the voltage applied across the field winding of the control device is controlled by the reference signal such as created by the position of the acceleration pedal in the motor vehicle.

摘要翻译： 一种用于控制具有车载蓄电池的电动机动车辆的直流驱动电动机的装置，该电动机具有电枢和单独激励的励磁绕组。 该控制装置包括用于感测通过电枢的电流（122）的装置，用于产生指示感测到的电枢电流（124）的电枢电流信号的装置，用于产生指示车辆（110）的期望速度的参考信号的装置 ），用于产生指示电枢电流信号和参考信号（120）之间的关系的误差信号的比较装置，用于根据误差信号（140）控制施加在电枢上的电压的装置和响应于误差的装置 信号，用于当误差信号超过预选值时根据误差信号改变励磁绕组上的电压（172）。 在该装置中，提供了一种改进，其包括用于至少在误差信号低于预选值的时段期间根据参考信号来控制励磁绕组两端的电压的装置。 以这种方式，施加在控制装置的励磁绕组上的电压由诸如由机动车辆中的加速踏板的位置产生的参考信号控制。

公开(公告)号：EP0070633A2

公开(公告)日：1983-01-26

申请号：EP82303368.3

申请日：1982-06-28

申请人： Limitorque Limited

发明人： Dumont, Gilbert C. ,  Dumont, Pierre-Yves

IPC分类号： H02P7/00

CPC分类号： H03K17/725 ,  H02P23/24

摘要： An electrical switching circuit for a multi-phase a.c. supply uses semiconductor rectifier switches SCR1 to 5 to reversibly switch power to a multi-phase electric motor so that the motor can be run in a forward or a reverse direction. The SCRs are provided in two sets, one for switching power to forward run the motor, and the other set for reverse running of the motor. Inductor elements AL are connected in series with the SCRs. The inductor elements comprise coils which include a non-linear permeability core, for example of ferrite or permalloy, which are operative to suppress voltage transients at switch on of the motor. These transients would otherwise produce spurious firing of the SCRs and could produce a short circuit across the input phases of the a.c. supply. The circuit is used in a valve actuator. Improved torque limit switches and position limit switches are disclosed, which operate a low voltage and which use Reed and Hall effect switches.

摘要翻译： 一种多相电气开关电路。 电源使用半导体整流器开关SCR1至5来可逆地将功率切换到多相电动机，使得电动机可以向前或向后运行。 SCR提供两组，一组用于切换电源以正向运行电机，另一组用于电机反向运行。 电感元件DELTA L与SCR串联连接。 电感器元件包括线圈，其包括例如铁氧体或坡莫合金的非线性磁导率磁芯，其可操作以抑制电动机接通时的电压瞬变。 这些瞬变否则将产生SCR的杂散发射，并且可能在交流电的输入相之间产生短路。 供应。 电路用于阀门执行机构。 公开了改进的扭矩限制开关和位置限位开关，其操作低电压并且使用里德和墙效应开关。

公开(公告)号：EP0066015A1

公开(公告)日：1982-12-08

申请号：EP81302294.4

申请日：1981-05-22

申请人： FORD AEROSPACE & COMMUNICATIONS CORPORATION

发明人： Ho, Pang Ting ,  Rubin, Michael David

IPC分类号： H01P5/18

CPC分类号： H01P5/227 ,  H01P5/225

摘要： An impedance transforming coupler (27,28) is disclosed which may be used as a power divider or power combiner at microwave frequencies. The power division or power combination ratio is arbitrary, and the impedance transformation ratio is arbitrary. These couplers may be used in a circuit to power-combine amplifiers (11, 12). The insertion loss of the circuit is low and the bandwidth is improved by an order to two to one over prior art systems which had separate circuits for matching the impedance and providing power combining. The coupler is optimally a branch line coupler having four curved branches a quarter wavelength long at the center frequency. The output ports are 90° out of phase. Simple formulas are given relating the desired admittances of each of the four branches to k, the desired power coupling ratio, and Y, the desired admittance transformation ratio.

摘要翻译： 公开了可以用作微波频率的功率分配器或功率组合器的阻抗变换耦合器（27,28）。 功率分配或功率组合比是任意的，阻抗变换比是任意的。 这些耦合器可以用于电路组合放大器（11,12）中。 电路的插入损耗低，并且与现有技术的系统相比，带宽被改善了两到一个，其具有用于匹配阻抗和提供功率组合的分离电路。 耦合器是最佳的分支线耦合器，其中心频率具有四分之一波长长的四个弯曲分支。 输出端口为90°异相。 给出了将四个分支中每个分支的期望导纳与期望的功率耦合比k相关联的简单公式，以及期望的导纳变换比Y。

公开(公告)号：EP0058076A2

公开(公告)日：1982-08-18

申请号：EP82300613.5

申请日：1982-02-08

申请人： GORING KERR LIMITED

发明人： Kerr, Bruce Goring

IPC分类号： G01V3/11

CPC分类号： G01V3/107

摘要： Metal detection apparatus includes an oscillator coil 101 driven by an oscillator 101, which induces in detector coils 103, 104 equal and opposite E.M.F.s such that a nominally zero output is produced at terminals D.E. When metal is detected the E.M.F.s in coils 103,4 move out balance to produce a voltage at D.E., which is detected by circuit IC11 and fed to output circuits 111. Drifts in the nominally zero output at D.E. are corrected by combining quadraphase balancing signals on lines 109, 110 with the detector coil output by means of amplifier IC10. The combined signal from IC10 is fed to phase sensitive detectors IC1,2 which respectively detect the quadraphase components of the combined signal from IC10. The outputs of IC1,2 are stored by capacitor circuits 112, 113 and used to adjust variable capacity diode bridges 106,7 which adjust the amplitude of the balancing signals to maintain a nominally zero output from IC10 when metal is not being detected. The capacitor circuits 112, 113 have a long time constant so that the balacing signals are not adjusted to cancel out the detection of metal, but circuits IC5,6,13 switches the stores 112, 113 to provide a shorter time constant after metal has been detected in order to restore the circuit rapidly to a balanced condition. Additionally, the circuits IC5,6,13 disconnect the capacitor circuits from the phase sensitive detectors IC1, IC2 for a given time when metal is detected so as to restore the circuit rapidly to a balanced condition after detection of the metal.

公开(公告)号：EP0042460A1

公开(公告)日：1981-12-30

申请号：EP80302101.3

申请日：1980-06-20

申请人： Hughes Aircraft Company

发明人： Rubin, Lawrence M.

IPC分类号： H03G3/20

CPC分类号： H03G3/3005 ,  H03G7/002

摘要： An automatic gain control system has a multiplying circuit (10) for multiplying levels of input and feedback signals. Such control system is provided with a closed loop homomorphic network connected between the output terminal of the control system and the feedback terminal of the multiplying circuit. Such homomorphic network maintains a compressed output signal level at the system's output terminal, inhibits oscillation and latching up of the main system in which this AGC system is a component, and provides low distortion and noise levels of signals processed by this AGC system; and the network includes a logarithmic amplifier (20) a convolver (30) and an exponentiator (40) which operate on the output Vo of the multiplier circuit (10) to provide a signal (V3) to be fed back to the multiplier circuit and by which an input signal Vi is multiplied to achieve the output Vo.

摘要翻译： 自动增益控制系统具有用于乘以输入和反馈信号电平的乘法电路（10）。 这种控制系统设置有连接在控制系统的输出端和乘法电路的反馈端之间的闭环同态网络。 这种同态网络在系统的输出端保持压缩的输出信号电平，禁止该AGC系统为其一部分的主系统的振荡和锁存，并提供由该AGC系统处理的信号的低失真和噪声水平; 并且所述网络包括对数放大器（20），在所述乘法器电路（10）的输出Vo上操作的卷积器（30）和指数器（40），以提供要反馈到所述乘法器电路的信号（V3），以及 通过其输入信号Vi被乘以实现输出Vo。

公开(公告)号：EP0035351A2

公开(公告)日：1981-09-09

申请号：EP81300727.5

申请日：1981-02-20

申请人： GOULD INC.

发明人： Zaghi, Hooshmand ,  Tisone, Thomas C.

IPC分类号： G01L1/22 ,  H01C17/12

CPC分类号： G01L1/2287 ,  G01L1/2225 ,  H01C17/12

摘要： An improved deformable flexure element (10) for use in strain gage transducers and a process for making the element are disclosed. By appropriate selection of materials and gage geometries in accordance with the invention, the zero and span temperature coefficients of the transducer are reduced substantially to zero. Improved processes for producing such flexure elements are disclosed.

公开(公告)号：EP0034486A2

公开(公告)日：1981-08-26

申请号：EP81300610.3

申请日：1981-02-13

申请人： IMPERIAL CLEVITE INC.

发明人： Rider, Thomas F.

IPC分类号： F16L35/00

CPC分类号： F16L57/00 ,  F16L55/005

摘要： A blow-out guard is disclosed for use with high-pressure conduits. A double layer, wire sheath is fixedly attached over the end portion of the hose. If the hose should burst, the medium escapes through the interstices of the sheath and is thereby reduced to a dispersed effluent or a fine spray, thus protecting the operator.

摘要翻译： 公开了一种用于高压导管的防喷器。 双层导线护套固定地连接在软管的端部上。 如果软管爆裂，则介质通过护套的空隙逸出，并由此减少为分散的流出物或细小的喷雾物，从而保护操作员。

公开(公告)号：EP0029638A1

公开(公告)日：1981-06-03

申请号：EP80301910.8

申请日：1980-06-06

申请人： Combined Optical Industries Limited

发明人： Pasco, Ian Kenneth

IPC分类号： G01D11/28 ,  G12B11/02

CPC分类号： G01D11/28 ,  G12B11/02

摘要： The present invention relates to laminar light guides which are particularly suitable for providing illumination from one or more light sources to a plurality of instruments and other display devices as in a vehicle instrument panel. The guide makes efficient use of the light available from the light sources. The guide comprises a transparent lamina (2,3,4) having at least one integrally formed light input socket (4) for receiving a light source (14). The socket (4) is formed with lens means (13) and reflecting means (15) for directing light from the source into the plane of the lamina where it is internally reflected until encountering extracting means including roughened surfaces (6,7,8,9) for reflecting light diffusely out of the plane ofthe lamina or conical apertures (5) for reflecting light into a beam transverse to the plane of the lamina. The light is extracted to illuminate display characters (16) or areas in an otherwise opaque screen (17), or to direct light into pointers of instruments, for example clocks, speedometers etc.

公开(公告)号：EP0027015A2

公开(公告)日：1981-04-15

申请号：EP80303406.5

申请日：1980-09-26

申请人： IMPERIAL CHEMICAL INDUSTRIES PLC

发明人： Parr, Andrew Francis

IPC分类号： H02M3/335 ,  H02P13/22

CPC分类号： H02M3/33507

摘要： A d.c. to d.c. converter which produces from a low voltage battery supply a high voltage d.c. output. The converter comprises a step up transformer the primary (Lp) of which receives current pulses under the control of an oscillator (5). For each current pulse, the current builds up steadily and is then abruptly cut off so as to induce a high voltage pulse in a secondary (L s ) of the transformer. The high voltage pulses pass along a voltage multiplier (6) to provide the high voltage d.c. output. Each high voltage pulse has associated with it a low voltage pulse in the primary (Lp) which is used to control the rate of the oscillator (5). The oscillator (5) is also controlled as a function of the peak current in the primary (Lp) by a transistor TR3, and the oscillator is further controlled to limit its maximum rate when the output current exceeds a given level, by means of a feedback loop (R3, C4, R4, IC4, TR3).