公开(公告)号：US5225992A

公开(公告)日：1993-07-06

申请号：US269181

申请日：1989-08-24

申请人： Katsuo Kobari ,  Shinji Seki ,  Shunsuke Matsubara

发明人： Katsuo Kobari ,  Shinji Seki ,  Shunsuke Matsubara

IPC分类号： G05F1/10 ,  H02H6/00

CPC分类号： H02H6/005

摘要： An overcurrent detector realized by using a computer. The apparatus is provided with an overcurrent detector (5) which calculates the temperature rise .theta.(n) =K.sub.1 P(n)+K.sub.2 .theta.(n-1), based on a current (In) flowing in an electric machine, under the conditions that the machine has an electric resistance (r), the machine works in a known ambient temperature, the allowable temperature rise (.theta.(max)) of the machine is known, a first coefficient (K.sub.1) and a second coefficient (K.sub.2) are predetermined. The overcurrent detector (5) further compares the temperature rise (.theta.(n)) with a difference between the allowable temperature rise (.theta.(max)) of the machine and the ambient temperature at which the machine is used, and determines that the machine is in an overcurrent position, when the former exceeds the latter.

公开(公告)号：US4864209A

公开(公告)日：1989-09-05

申请号：US233647

申请日：1988-06-22

申请人： Shinji Seki ,  Shunsuke Matsubara

发明人： Shinji Seki ,  Shunsuke Matsubara

IPC分类号： G05B11/36 ,  G05D3/12

CPC分类号： G05B11/36

摘要： A negative feedback control system includes a step of amplifying digital information by an amplifying operation at a high response speed and not including an integration. The negative feedback control system detects a predetermined amount of increase and decrease in the controlled variable, and outputs an increment signal or a decrement signal according to the predetermined amount of increase and decrease in the controlled variable, respectively, receives increment signals and the decrement signals from a controlled variable detecting unit 4, ignores the first successive n increment signals immediately after an arbitrary decrement signal, then begins to count each increment signal as a +1 unit from the n+1-th increment signal after the arbitrary decrement signal, and ignores the first successive n decrement signals immediately after an arbitrary increment signal, then begins to count each decrement signal as a -1 unit from the n+l-th decrement signal after the arbitrary increment signal (FIG. 2); whereby the vibration of the controlled variable is suppressed.

公开(公告)号：US5444618A

公开(公告)日：1995-08-22

申请号：US918592

申请日：1992-07-24

申请人： Shinji Seki ,  Makoto Ibusuki ,  Yasuei Nomoto

发明人： Shinji Seki ,  Makoto Ibusuki ,  Yasuei Nomoto

IPC分类号： G09B29/00 ,  G06F17/30 ,  G06T11/60 ,  G06T17/05 ,  G09B29/10 ,  G06F17/00 ,  G06G7/48

CPC分类号： G06T17/05

摘要： For topographic processing, a plurality of maps are stored, the maps being of different scales and therefore being based on different amounts of map data. The user selects a map of appropriate scale, and can then select a part, for example a line, on which appropriate analysis is to be made, such as obtaining a cross section based on contour data of the map. The map data corresponding to the selected part of the map is investigated and, where it does not meet an appropriate criterion, the data of a part of a map of different scale is investigated, the part of the two maps corresponding to the same region. Hence information can be derived which meets the appropriate criterion. Thus, when obtaining a cross section, if the amount of data for a region of a map is insufficient for a satisfactory cross section to be obtained, the data of the same region of a map of larger scale is analyzed, so that a satisfactory cross section can be achieved. The processing is also applicable to the investigation of lines of sight, using the map data.

摘要翻译： 对于地形处理，存储多个地图，地图具有不同的尺度，因此基于不同数量的地图数据。 用户选择适当比例的地图，然后可以选择要在其上作出适当分析的部分，例如线，例如基于地图的轮廓数据获得横截面。 研究与地图的选定部分对应的地图数据，在不符合适当标准的情况下，对不同尺度的地图的一部分的数据进行调查，对应于同一区域的两幅地图的一部分。 因此，可以导出符合适当标准的信息。 因此，当获得横截面时，如果地图的区域的数据量不足以获得令人满意的横截面，则分析较大比例的地图的相同区域的数据，从而满足交叉 部分可以实现。 该处理也适用于使用地图数据的视线调查。

公开(公告)号：US4950967A

公开(公告)日：1990-08-21

申请号：US337612

申请日：1989-04-03

申请人： Keiji Sakamoto ,  Shinji Seki ,  Yasusuke Iwashita

发明人： Keiji Sakamoto ,  Shinji Seki ,  Yasusuke Iwashita

IPC分类号： H02P29/00 ,  H02P23/00

CPC分类号： H02P23/16

摘要： The invention provides a servomotor control apparatus which performs standard mode-type velocity control. An acceleration signal is formed by a differential computation or difference computation, from a velocity signal fed back from a servomotor. An acceleration value of the servomotor (d) is estimated by a criterion model (2) of a velocity control system utilizing a current command T(S) formed in a velocity control loop. The computed acceleration and the estimated acceleration are compared and the current command T(S) is corrected in conformity with the results of the comparison.

公开(公告)号：US5093609A

公开(公告)日：1992-03-03

申请号：US415328

申请日：1989-09-07

申请人： Keiji Sakamoto ,  Shinji Seki ,  Yasusuke Iwashita

发明人： Keiji Sakamoto ,  Shinji Seki ,  Yasusuke Iwashita

IPC分类号： H02P29/00 ,  G05B11/42 ,  H02P23/00

CPC分类号： G05B11/42 ,  H02P23/16

摘要： A servomotor control method controls a servomotor stably at a high speed. A control loop is switched from a PI control mode to an I-p control mode by varying a gain coefficient of a proportional arithmetic unit (1). This achieves a control process having the advantages of both the PI and I-p control modes.

摘要翻译： PCT No.PCT / JP89 / 00029 Sec。 371日期：1989年9月7日 102（e）1989年9月7日PCT PCT 1月12日PCT PCT。 出版物WO89 / 06892 日期：1989年7月27日。伺服电动机控制方法以高速稳定地控制伺服电动机。 通过改变比例运算单元（1）的增益系数，控制回路从PI控制模式切换到I-p控制模式。 这实现了具有PI和I-p控制模式的优点的控制过程。

公开(公告)号：US4458192A

公开(公告)日：1984-07-03

申请号：US474335

申请日：1983-03-11

申请人： Keiji Sakamoto ,  Shinji Seki

发明人： Keiji Sakamoto ,  Shinji Seki

IPC分类号： H02P27/08 ,  H02P21/06 ,  H02P23/00 ,  H02P25/02

CPC分类号： H02P23/0077 ,  H02P21/06 ,  H02P25/03

摘要： An apparatus for driving an A.C. motor includes a circuit for computing the sum of polyphase A.C. signals used to drive a pulse-width modulation circuit for controlling an inverter, and for limiting the amplitude of a current command when said sum is other than zero. When an imbalance occurs in the polyphase A.C. signals, the current command amplitude is immediately limited in accordance with the state of the imbalance to prevent saturation of a current amplifier that is operable to produce the polyphase A.C. signals by amplifying the outputs of an arithmetic circuit. These outputs are difference currents obtained by computing the difference between polyphase command currents and corresponding ones of detected polyphase currents actually applied to the A.C. motor. Preventing saturation of the current amplifier assures that the polyphase currents actually applied to the A.C. motor will be held in a balanced state at all times.

摘要翻译： 用于驱动交流电动机的装置包括用于计算用于驱动用于控制逆变器的脉冲宽度调制电路的多相交流信号的和的和用于当所述和不是零时限制电流指令的幅度的电路的电路。 当在多相交流信号中发生不平衡时，根据不平衡的状态立即限制电流指令幅度，以防止可操作以通过放大运算电路的输出来产生多相交点信号的电流放大器的饱和。 这些输出是通过计算多相指令电流和实际施加到交流电动机的相应检测到的多相电流之间的差而获得的差电流。 防止电流放大器的饱和，确保实际施加到交流电动机的多相电流始终保持在平衡状态。

公开(公告)号：US06316129B1

公开(公告)日：2001-11-13

申请号：US09275003

申请日：1999-03-24

申请人： Isao Seki ,  Shigeo Hama ,  Shigehiro Tanike ,  Fukashi Watanabe ,  Masahiko Kakizaki ,  Shinji Seki

发明人： Isao Seki ,  Shigeo Hama ,  Shigehiro Tanike ,  Fukashi Watanabe ,  Masahiko Kakizaki ,  Shinji Seki

IPC分类号： H05K504

CPC分类号： B21K23/00 ,  B21J5/02 ,  B21K21/02 ,  H05K5/02 ,  Y10T428/12361 ,  Y10T428/12375 ,  Y10T428/12382 ,  Y10T428/12389 ,  Y10T428/12993 ,  Y10T428/31681

摘要： A thin, forged magnesium alloy casing is integrally constituted by a thin plate with projections on either or both surfaces, and the thin plate is as thin as about 1.5 mm or less. The thin forged casing can be produced by (a) carrying out a first forging step for roughly forging a magnesium alloy plate to form an intermediate forged product under the conditions of a preheating temperature of the magnesium alloy plate of 350-500° C., a die temperature of 350-450° C., a compression pressure of 3-30 tons/cm2, a compressing speed of 10‥500 mm/sec. and a compression ratio of 75% or less; and (b) carrying out a second forging step for precisely forging the intermediate forged product under the conditions of a preheating temperature of the intermediate forged product of 300-500° C., a die temperature of 300-400° C., a compression pressure of 1-20 tons/cm2, a compressing speed of 1-200 mm/sec., and a compression ratio of 30% or less.

摘要翻译： 薄的锻造的镁合金外壳由在一个或两个表面上具有突起的薄板一体地构成，并且薄板薄至约1.5mm或更小。 可以通过（a）在镁合金板的预热温度为350〜500℃的条件下，进行大致锻造镁合金板以形成中间锻造品的第一锻造工序来制造薄型锻造套管， 模具温度为350-450℃，压缩压力为3-30吨/厘米2，压缩速度为10‥500毫米/秒。 压缩比为75％以下; 和（b）进行第二锻造工序，在中间锻造品的预热温度为300〜500℃，模具温度为300〜400℃的条件下精密锻造中间锻造品，压缩 压力为1-20吨/ cm2，压缩速度为1-200mm / sec，压缩比为30％以下。

公开(公告)号：US4956593A

公开(公告)日：1990-09-11

申请号：US368291

申请日：1989-05-24

申请人： Keiji Sakamoto ,  Shinji Seki ,  Yasusuke Iwashita

发明人： Keiji Sakamoto ,  Shinji Seki ,  Yasusuke Iwashita

IPC分类号： H02P29/00 ,  H02P23/00

CPC分类号： H02P23/22

摘要： A servo motor controlling method for controlling both speed and current of a servo motor under digital control. An integration gain unit (22) and a loop proportional gain unit (26) of the current controlling loop are subjected to correction by respective gain units (23, 27) so as to be increased depending upon the rotational speed of the servo motor. Since a current loop gain is increased depending upon the rotational speed of the servo motor, the oscillation of the current loop does not occur at the time of low speed drive and stop, and the shortage of torque due to the lowering of the current loop gain at the time of high speed drive can be prevented.

公开(公告)号：US4547719A

公开(公告)日：1985-10-15

申请号：US460982

申请日：1983-01-25

申请人： Keiji Sakamoto ,  Shinji Seki

发明人： Keiji Sakamoto ,  Shinji Seki

IPC分类号： H02P21/00 ,  H02P25/02 ,  H02P27/04 ,  H02P5/40

CPC分类号： H02M7/53875 ,  H02P25/03 ,  H02M2001/385

摘要： To reduce adverse effects due to a dead zone in a pulse-width modulation circuit provided for avoiding short-circuiting in an inverter circuit, distortions of sine wave currents generated when low-frequency current commands are given, sound produced due to the excitation, and torque variations, a synchronous motor drive apparatus has been provided. The apparatus comprises a current detector circuit for detecting drive currents given to the synchronous motor, a difference output circuit for producing as outputs the differences between current commands given to the synchronous motor and the detected currents, a pulse-width modulation circuit for modulating signals indicative of the differences by way of pulse-duration modulation, an inverter circuit for driving the synchronous motor, a voltage detector circuit for detecting output voltages from output terminals of the inverter circuit, and a circuit for generating the differences between output voltages from the difference output circuit and the detected output voltages, whereby the synchronous motor can be driven by the outputs from the inverter circuit which is operated by voltage command values indicating the last-mentioned differences.

摘要翻译： 为了减少用于避免逆变器电路短路的脉冲宽度调制电路中由于死区带来的不利影响，给出低频电流指令时产生的正弦波电流的失真，由于激励而产生的声音，以及 扭矩变化，提供了同步电动机驱动装置。 该装置包括用于检测给予同步电动机的驱动电流的电流检测器电路，用于产生给予同步电动机的电流指令与检测到的电流之间的差的输出的差分输出电路，用于调制信号的脉冲宽度调制电路 通过脉冲持续时间调制的差异，用于驱动同步电动机的逆变器电路，用于检测来自逆变器电路的输出端的输出电压的电压检测器电路，以及用于产生来自差分输出的输出电压之间的差异的电路 电路和检测到的输出电压，从而可以由来自反相电路的输出来驱动同步电动机，该反相器电路由表示最后提到的差值的电压指令值来操作。

公开(公告)号：US07184379B2

公开(公告)日：2007-02-27

申请号：US10080994

申请日：2002-02-20

申请人： Akira Tsukihashi ,  Toru Tanaka ,  Yasushi Hanamoto ,  Shinji Seki ,  Toshihiko Hiroshima ,  Yutaka Imamura

发明人： Akira Tsukihashi ,  Toru Tanaka ,  Yasushi Hanamoto ,  Shinji Seki ,  Toshihiko Hiroshima ,  Yutaka Imamura

IPC分类号： G11B7/0045

CPC分类号： G11B20/10527 ,  G11B19/00 ,  G11B2020/10685 ,  G11B2020/10703 ,  G11B2020/10731 ,  G11B2020/1074 ,  G11B2020/10814

摘要： An operation for recording a recording signal onto a disk (1) is interrupted, when an amount of signal data stored in a buffer RAM (11) for temporarily storing the recording signal is less than an interruption setting value during performing of the recording operation. Moreover, when the amount of signal data stored in the buffer RAM (11) increases and indicates a resumption setting value, the signal recorded on the disk (1) before interruption is reproduced, and the recording operation is resumed based on the reproduced signal. Moreover, recording properties are detected by the signal reproduced before resumption of recording.

摘要翻译： 当在执行记录操作期间存储在用于临时存储记录信号的缓冲RAM（11）中的信号数据量小于中断设置值时，用于将记录信号记录在盘（1）上的操作被中断。 此外，当存储在缓冲RAM（11）中的信号数据的量增加并且指示恢复设置值时，再现在中断之前记录在盘（1）上的信号，并且基于再现信号重新开始记录操作。 此外，通过在恢复记录之前再现的信号来检测记录属性。