公开(公告)号：US3942577A

公开(公告)日：1976-03-09

申请号：US489158

申请日：1974-07-17

申请人： Minoru Uozumi ,  Fumio Kawano ,  Norio Iwama

发明人： Minoru Uozumi ,  Fumio Kawano ,  Norio Iwama

IPC分类号： H02K44/06 ,  B22D7/00 ,  B22D9/00 ,  B22D11/10 ,  B22D11/103 ,  B22D11/18 ,  B22D37/00 ,  B22D39/00 ,  B22D27/02

CPC分类号： B22D39/003

摘要： A method of controlling electromagnetic casting for carrying out the pouring of molten metal is disclosed which utilizes an electromagnetic force generated by a travelling magnetic field. The apparatus for performing the method is constructed so that a single magnet coil for generating a travelling magnetic field is employed and the input current of one phase of the three-phase alternating current to be applied to the magnet coil is subjected to phase control, whereby the electromagnetic force of the travelling magnetic field is controlled so as to automatically effect compensation for the change of the molten metal level due to the decrease of the amount of molten metal remaining to be poured.

摘要翻译： 公开了一种利用由行驶磁场产生的电磁力来控制熔融金属浇注的电磁铸造的方法。 用于执行该方法的装置被构造成使得用于产生行进磁场的单个磁体线圈被施加到电磁线圈上的三相交流电的一相的输入电流进行相位控制，由此 控制行驶磁场的电磁力，以便由于剩余的待投入的熔融金属量的减少而自动地实现对熔融金属水平的变化的补偿。

公开(公告)号：US4641075A

公开(公告)日：1987-02-03

申请号：US608247

申请日：1984-05-08

申请人： Katsuhiro Asano ,  Yukio Inaguma ,  Norio Iwama

发明人： Katsuhiro Asano ,  Yukio Inaguma ,  Norio Iwama

IPC分类号： H02M7/48 ,  H02P23/00 ,  H02P27/08 ,  H02P5/40

CPC分类号： H02M7/53873 ,  H02P23/28 ,  H02M2007/53876

摘要： An inverter current controlling method wherein output currents of an inverter having a plurality of switching elements and connected to a three-phase load are detected, and the switching elements are ON/OFF controlled so that the waveforms of the output currents are approximated to set output current wave commands, respectively, comprising: maintaining a specific switching element in a specific state so that a specific output terminal of the inverter is fixed to a specific polarity during a period of time when a specific ideal phase voltage of the three-phase load corresponding to the output current wave command is in a predetermined phase; and ON/OFF controlling the switching elements other than the specific switching element during the period of the predetermined phase so that the output current waveforms are approximated to the output current wave commands, respectively. Also disclosed is an inverter current controlling apparatus suitably employed in the above-mentioned method.

摘要翻译： 一种逆变器电流控制方法，其中检测到具有多个开关元件并连接到三相负载的逆变器的输出电流，并且开关元件被ON / OFF控制，使得输出电流的波形被近似设置输出 分别包括：将特定开关元件保持在特定状态，使得在相应于三相负载的特定理想相电压的时间段内将逆变器的特定输出端固定为特定极性 输出电流波形指令处于预定阶段; 以及在预定相位期间控制除了特定开关元件之外的开关元件的ON / OFF，使得输出电流波形分别近似于输出电流波形命令。 还公开了适用于上述方法的逆变器电流控制装置。

公开(公告)号：US4467407A

公开(公告)日：1984-08-21

申请号：US442153

申请日：1982-11-16

申请人： Katsuhiro Asano ,  Norio Iwama

发明人： Katsuhiro Asano ,  Norio Iwama

IPC分类号： H02M7/483 ,  H02M7/497 ,  H02M7/515 ,  H02M1/14

CPC分类号： H02M7/487

摘要： The multi-level inverter according to the present invention comprises: a group of DC power supplies including three or more DC power supplies which are connected in series with same polarities, a group of terminals including a plurality of terminals for taking desired voltage levels from the opposite end and respective connecting points of group of DC power supplies, a group of switches consisting of switches having open modes and short-circuit modes equal in number to the terminals in the group of the terminals, with respective terminals on the input side being connected to the terminals in the group of terminals and respective terminals on the output side being commonly interconnected, and output terminals connected to the terminals on the output side being commonly interconnected in the group of switches. A contact of a switch connected to a terminal corresponding to desired voltage levels is closed to output voltages at multi-levels to be applied to a load.

摘要翻译： 根据本发明的多电平逆变器包括：一组直流电源，包括串联具有相同极性的三个或更多个直流电源，一组端子，包括多个端子，用于从 直流电源组的相对端和各个连接点，一组由具有开路模式和短路模式的开关组成的开关，其数量等于端子组中的端子，输入端上的各个端子被连接 到端子组中的端子和输出侧的各个端子共同互连，并且连接到输出侧的端子的输出端子在开关组中共同互连。 连接到对应于期望电压电平的端子的开关的触点闭合以输出要施加到负载的多电平的电压。

公开(公告)号：US4722042A

公开(公告)日：1988-01-26

申请号：US915051

申请日：1986-10-03

申请人： Katsuhiro Asano ,  Norio Iwama

发明人： Katsuhiro Asano ,  Norio Iwama

IPC分类号： H02M7/48 ,  H02M7/497 ,  H02P27/06 ,  H02M7/44

CPC分类号： H02M7/53873 ,  H02M2007/53876

摘要： A method of controlling current of a multi-phase inverter is based on the principle that, when an appropriate switching mode is set, the direction of change of the position of the end of the current deviation vector must converge within a specific range which is determined in accordance with a presently output voltage vector. Accordingly, the direction of change of the position of the end of the current deviation vector and a presently set switching mode are detected during each control period to make a judgement as to whether or not the detected current deviation change direction belongs to a predetermined reference change direction range. When the answer of this judgement is affirmative, the presently set switching mode is found to be appropriate; therefore, this switching mode is maintained, whereas, when the answer of the judgement is negative, the switching mode is changed to a switching mode which has a reference change direction range to which the detected current deviation change direction belongs and which is determined in accordance with the presently output voltage vector. Thus, an appropriate switching mode is continued or newly set, and a voltage vector is selected from among voltage vectors which are allowed to be selected in this set switching mode, said voltage vector being capable of converging the current deviations within a predetermined range including the origin on the complex plane, and the selected voltage vector is employed as a voltage vector for the next control period.

摘要翻译： 控制多相逆变器的电流的方法是基于以下原理：当设定适当的开关模式时，电流偏差矢量的端部的位置的变化方向必须收敛在确定的特定范围内 根据目前的输出电压矢量。 因此，在每个控制周期期间检测电流偏差矢量的结束位置的变化方向和当前设定的切换模式，以判断检测到的电流偏差改变方向是否属于预定的参考变化 方向范围。 当该判断的答案是肯定的时，发现当前设置的切换模式是适当的; 因此，保持该切换模式，而当判断结果为否定时，切换模式变为切换模式，该切换模式具有检测到的电流偏差变化方向所属的参考变化方向范围，并且根据 与目前的输出电压矢量。 因此，继续或重新设定适当的开关模式，并且从在该设定开关模式中允许选择的电压矢量中选择电压矢量，所述电压矢量能够将电流偏差收敛在包括 起始于复平面，并且所选择的电压矢量被用作下一个控制周期的电压矢量。

公开(公告)号：US5412584A

公开(公告)日：1995-05-02

申请号：US159196

申请日：1993-11-30

申请人： Takaji Umeno ,  Katsuhiro Asano ,  Norio Iwama

发明人： Takaji Umeno ,  Katsuhiro Asano ,  Norio Iwama

IPC分类号： B60C23/06 ,  G01L17/00 ,  G01M17/04 ,  G01M99/00 ,  G06F15/20

CPC分类号： G01M99/00 ,  G01L17/00 ,  G01M17/04

摘要： A diagnosing apparatus for diagnosing a dynamic system by detecting a fault of the dynamic system. The diagnosing apparatus comprises: disturbance estimating means for estimating an integrated disturbance vector, which is the sum of external and internal disturbance vectors of the dynamic system, based on an internal state vector of the dynamic system; correlation calculating means for calculating a cross-correlation between the estimated integrated disturbance vector and the internal state vector and for separating from the integrated disturbance a component relating to the internal disturbance; and diagnosing means for specifying a corresponding fault portion of the dynamic system from the separated component relating to the internal disturbance.

摘要翻译： 一种用于通过检测动态系统的故障来诊断动态系统的诊断装置。 诊断装置包括：干扰估计装置，用于基于动态系统的内部状态向量来估计作为动态系统的外部和内部干扰矢量的总和的积分干扰矢量; 相关计算装置，用于计算估计的积分干扰矢量和内部状态矢量之间的互相关，并且与积分干扰分离与内部干扰有关的分量; 以及用于从与内部干扰相关的分离的分量中指定动态系统的相应故障部分的诊断装置。