Control unit for multi-phase static converter
    2.
    发明授权
    Control unit for multi-phase static converter 失效
    多相静态转换器控制单元

    公开(公告)号:US4267570A

    公开(公告)日:1981-05-12

    申请号:US62304

    申请日:1979-07-31

    申请人: Rudiger Braun

    发明人: Rudiger Braun

    IPC分类号: H02M1/084 H02M7/515

    CPC分类号: H02M7/5155 H02M1/0845

    摘要: A digital control unit has an oscillator driven, binary coded counter, the outputs of which are connected to the first addend inputs of a number of adders. The second addend inputs of the adders are connected to phase angle inputs. The summation outputs of the adders are connected to a logic circuit, which derives timing pulses from the signals at the summation outputs of the adders and interlinks them to form a three-phase system of firing pulses for the controlled valves of the converter. The control unit can be used for fast shutdown of the controlled converter by blocking the firing pulses for the controlled main valves and shifting the firing pulses for the quenching valves as a function of the instantaneous phase of the converter output voltage; also the operating frequency can be increased.

    摘要翻译: 数字控制单元具有振荡器驱动的二进制编码计数器,其输出连接到多个加法器的第一加数输入。 加法器的第二个加法输入连接到相位角输入。 加法器的求和输出连接到逻辑电路,该逻辑电路从加法器的求和输出处的信号中导出定时脉冲,并将它们互相连接,以形成用于转换器的受控阀的点火脉冲的三相系统。 控制单元可用于通过阻塞受控主阀的点火脉冲和作为转换器输出电压的瞬时相位的方式移动用于淬火阀的点火脉冲来快速关闭受控转换器; 也可以提高工作频率。

    Light concrete and method of preparing the same
    3.
    发明授权
    Light concrete and method of preparing the same 失效
    轻混凝土及其制备方法

    公开(公告)号:US4126470A

    公开(公告)日:1978-11-21

    申请号:US832667

    申请日:1977-09-12

    IPC分类号: C04B28/02 C04B7/35

    CPC分类号: C04B28/02

    摘要: A light concrete prepared from a mixture of Portland cement, cellular aggregate, and an admixture including a melamine-formaldehyde condensate carrying sulfo groups for reducing the need for mixing water, an alkaline earth metal stearate as a water repelling material, and polyethyleneglycol has greater mechanical strength at lower density than an otherwise identical concrete containing only two ingredients of the admixture.

    摘要翻译: 由波特兰水泥,细胞聚集体和包含三聚氰胺 - 甲醛缩合物的混合物混合物制备的轻混凝土,用于减少需要混合水的磺胺基,作为排斥材料的碱土金属硬脂酸酯和聚乙二醇具有更大的机械 强度低于仅含有两种混合物成分的混合物。

    Method and device for balancing a three-phase system
    4.
    发明授权
    Method and device for balancing a three-phase system 失效
    用于平衡三相系统的方法和装置

    公开(公告)号:US5148362A

    公开(公告)日:1992-09-15

    申请号:US742293

    申请日:1991-08-08

    IPC分类号: H02J3/26 H02M7/525

    CPC分类号: H02J3/26 H02M7/525 Y02E40/50

    摘要: A method and a device balance a three-phase system (18) formed by means of an invertor (12) from a dc voltage source (10), the output (R', S', T') of said invertor (12) being provided with a filter (14) followed by a neutral grounding transformer (16). Positive and negative phase-sequence system components (u.sub.1s, u .sub.1c, u.sub.2c, u.sub.2s) are formed from the measured voltages (u.sub.R, u.sub.S, u.sub.T). These measured voltages (u.sub.R, u.sub.S, u.sub.T) form positive and negative phase-sequence system manipulated variables (U.sub.St.phi., U.sub.St1c, U.sub.St2c, U.sub.St2s). The positive and negative phase-sequence system manipulated variables (U.sub.St1c, U.sub.St2s, U.sub.St2c) are transformed by means of a transformation device (50) into phase-to-neutral voltage manipulated variable (U.sub.Str, U.sub.Sts, U.sub.Stt) and routed to angularly symmetrical drive units 76, 78, 80). A three-phase system (18) formed can thus be kept balanced, with means of the multivariable control systems, even with an unbalanced load.

    摘要翻译: 一种方法和装置平衡通过来自直流电压源(10)的反相器(12)形成的三相系统(18),所述逆变器(12)的输出(R',S',T'), 设置有过滤器(14),随后是中性接地变压器(16)。 根据测量电压(uR,uS,uT)形成正和负相序系统组件(&upbar&u1s,&upbar&u 1c,&upbar&u2c,&upbar&u2s)。 这些测量电压(uR,uS,uT)形成正和负相序系统操纵变量(USt phi,USt1c,USt2c,USt2s)。 通过变换装置(50)将正和负相序系统操纵变量(USt1c,USt2s,USt2c)变换为相到中性电压操纵变量(UStr,USts,UStt),并被路由到角对称驱动 单位76,78,80)。 因此,形成的三相系统(18)可以通过多变量控制系统的方式保持平衡,即使是负载不平衡。

    Control unit for static converter
    5.
    发明授权
    Control unit for static converter 失效
    静态转换器控制单元

    公开(公告)号:US4326160A

    公开(公告)日:1982-04-20

    申请号:US77151

    申请日:1979-09-19

    申请人: Rudiger Braun

    发明人: Rudiger Braun

    IPC分类号: H02M1/084 G05F1/455 H02M7/515

    CPC分类号: H02M1/0845

    摘要: A digital control unit for a static converter contains a binary-coded counter which counts the pulses of an oscillator. The counter outputs are connected to the address inputs of a function memory in which sawtooth or ramp functions are stored. The numbers read out of the function memory are compared in a comparator, with a number determining the drive of the static converter. The result of the comparison and pulses on selected outputs of the counter are linked, in a logic circuit, to form firing pulses for the static converter. The invention is suitable for control units for static converters, in particular for AC control elements and inverters. All expense of adjusting, and all compensation of drift errors is obviated.

    摘要翻译: 用于静态转换器的数字控制单元包含对振荡器的脉冲进行计数的二进制编码的计数器。 计数器输出连接到存储锯齿波或斜坡功能的功能存储器的地址输入。 在比较器中比较从功能存储器中读出的数字,确定静态转换器的驱动数。 计数器的选定输出上的比较结果和脉冲在逻辑电路中相连,形成静态转换器的点火脉冲。 本发明适用于静态转换器的控制单元,特别适用于交流控制元件和逆变器。 所有调整费用,并且所有漂移误差的补偿都被消除。

    Method and device for balancing the circuits of a three-phase system
    6.
    发明授权
    Method and device for balancing the circuits of a three-phase system 失效
    用于平衡三相系统电路的方法和装置

    公开(公告)号:US5148361A

    公开(公告)日:1992-09-15

    申请号:US742026

    申请日:1991-08-08

    IPC分类号: H02J3/26 H02M7/525

    CPC分类号: H02M7/525 H02J3/26 Y02E40/50

    摘要: A method and a device balance a three-phase system (18) that is produced by means of an invertor (12) from a d.c. voltage source (10), such that the output (R',S',T') of this invertor (12) is equipped with a filter (14) to which a neutral grounding transformer (16) has been added. In keeping with the invention, absolute values (u.sub.R.sup.*, u.sub.S.sup.*, u.sub.T.sup.*), each of which is fed into a regulator device (34, 42; 36, 44; 38, 46) are formed from measured phase-to-phase voltages (u.sub.RL, u.sub.SL, u.sub.TL). Each absolute value produces a phase-to-phase voltage manipulated variable (U.sub.StR, U.sub.StS, U.sub.StT) such that by means of a transformer device (54), these phase-to-phase voltage manipulated variables (U.sub.StR, U.sub.StS, U.sub.StT) are transformed into phase-to-neutral manipulated variables (U.sub.Str, U.sub.Sts, U.sub.Stt) and are fed into angularly symmetrical control units (96, 98, 100). In this way, using a simple mono-phase control of absolute values, a three-phase system (18) with an asymmetrical load can remain symmetrical and, while retaining the symmetry of angle, the absolute values of the invertor (12) are controlled in an asymmetrical fashion.

    摘要翻译: 一种方法和装置平衡通过来自直流电源的逆变器(12)产生的三相系统(18)。 电压源(10),使得该逆变器(12)的输出(R',S',T')配备有已经添加了中性接地变压器(16)的滤波器(14)。 根据本发明,将每个被馈送到调节器装置(34,42; 36,44; 38,46)中的绝对值(ûR*,ûS*,ûT*)由测量的相间 电压(uRL,uSL,uTL)。 每个绝对值产生相间电压操纵变量(UStR,UStS,UStT),使得借助于变压器装置(54),将这些相间电压操纵变量(UStR,UStS,UStT)变换 进入相位到中性的操纵变量(UStr,USts,UStt),并被馈送到角度对称的控制单元(96,98,100)。 以这种方式,使用绝对值的简单单相控制,具有不对称负载的三相系统(18)可以保持对称,并且在保持角度对称的同时,控制逆变器(12)的绝对值 以不对称的方式。

    Circuit for forming periodic pulse patterns
    7.
    发明授权
    Circuit for forming periodic pulse patterns 失效
    用于形成周期性脉冲模式的电路

    公开(公告)号:US4330820A

    公开(公告)日:1982-05-18

    申请号:US44931

    申请日:1979-06-04

    申请人: Rudiger Braun

    发明人: Rudiger Braun

    摘要: A circuit arrangement for the formation of periodic pulse patterns for use in controlling converters which is capable of quick change of circuit arrangement without time wasted in adjustment and capable of use in different applications without need to change circuit. The circuit arrangement of the invention is also useful for the formation of a periodic pulse pattern which is variable as a function of a control signal. For this purpose the desired pulse pattern is formed of auxiliary patterns stored in a number of memories. An oscillator drives a binary-coded counter which forms the addresses for a memory in which the desired pulse pattern is stored. The address inputs of at least one of these memories are connected to the output of the counter by means of an arrangement for address shifting which responds to a control signal.

    摘要翻译: 用于形成用于控制转换器的周期性脉冲模式的电路装置,其能够快速改变电路布置,而无需浪费调整的时间,并且能够在不需要改变电路的情况下在不同的应用中使用。 本发明的电路装置对于形成可根据控制信号变化的周期脉冲图案也是有用的。 为此,期望的脉冲图案由存储在多个存储器中的辅助图案形成。 振荡器驱动二进制编码计数器,其形成存储所需脉冲模式的存储器的地址。 这些存储器中的至少一个的地址输入通过响应于控制信号的地址移位装置连接到计数器的输出。