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公开(公告)号：US4337509A
公开(公告)日：1982-06-29
申请号：US171266
申请日：1980-07-22
申请人： Tsutomu Omae , Toshihiko Matsuda
发明人： Tsutomu Omae , Toshihiko Matsuda
CPC分类号： H02P23/22 , H02P7/293 , Y10S388/912 , Y10S388/917
摘要： A digital control system for controlling firing pulses supplied to thyristors for power conversion to desired phases, wherein data necessary for obtaining desired phase control signals is set in a counter which normally counts clock pulses having a predetermined period and the firing pulses are generated in synchronism with the generation of overflow pulses from the counter. The data setting to the counter, which is repeated at a period shorter than that of the source voltage, is performed by reading out the actual count value of the counter by a digital arithmetic processor circuit, by correcting the read value by the use of the value corresponding to a desired phase and by setting the corrected value again in the counter.
摘要翻译： 一种数字控制系统，用于控制提供给晶闸管的点火脉冲，以将功率转换为期望的相位，其中获得期望相位控制信号所需的数据被设置在计数器中，该计数器通常对具有预定周期的时钟脉冲进行计数，并且触发脉冲与 从计数器产生溢出脉冲。 通过利用数字运算处理器电路读出计数器的实际计数值来进行以比源电压短的周期重复的计数器的数据设定，通过使用 值，并且通过在计数器中再次设置校正值。
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公开(公告)号：US4814678A
公开(公告)日：1989-03-21
申请号：US70551
申请日：1987-07-07
CPC分类号： H02P7/2805 , H02P23/16
摘要： A speed control apparatus for a motor comprising a motor model formed of a motor current model and a motor speed model connected in cascade, a basic torque instruction signal being applied to the motor model, and first and second control loops comparing output signals from the motor current model and the motor speed model with an instantaneous actual motor current signal and an instantaneous actual motor speed signal respectively and generating first and second correction signal to be added to the basic torque instruction signal to form a corrected torque instruction signal which is applied to a motor current control circuit, whereby a speed oscillation is suppressed even when the motor is driving an oscillatory load.
摘要翻译： 一种用于电动机的速度控制装置，包括由电动机电流模型和级联连接的电动机速度模型形成的电动机模型，施加到电动机模型的基本转矩指令信号，以及比较来自电动机的输出信号的第一和第二控制回路 电流模型和电动机速度模型，分别具有瞬时实际电动机电流信号和瞬时实际电动机速度信号，并产生要添加到基本转矩指令信号的第一和第二校正信号，以形成校正的转矩指令信号，其被施加到 电动机电流控制电路，即使当电动机驱动振荡负载时也能抑制速度振荡。
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公开(公告)号：US4839834A
公开(公告)日：1989-06-13
申请号：US2202
申请日：1987-01-12
CPC分类号： G01P13/045
摘要： In a speed detecting apparatus for detecting the rotational speed of a rotating body mechanically coupled thereto, an encoder generates one cycle of a sine-wave signal each time its angular position of rotation changes by a predetermined unit amount. A zero-crossing pulse is generated at each zero-crossing point of the sine-wave signal generated from the encoder, and the phase angle of the sine-wave signal is detected on the basis of the zero-crossing point of the sine-wave signal generated from the encoder. In a high speed range, the rotational speed is detected on the basis of the ratio between the number of zero-crossing pulses and the time interval between a first one and a last one of the plural zero-crossing pulses. On the other hand, in a low speed range, the rotational speed is detected on the basis of the combination of the number of the zero-crossing pulses appearing within a predetermined period of time and the phase angle of the sine-wave signal.
摘要翻译： 在用于检测与其机械耦合的旋转体的旋转速度的速度检测装置中，编码器每当其旋转角位置改变预定单位量时，就产生正弦波信号的一个周期。 在从编码器产生的正弦波信号的每个过零点处产生过零脉冲，并且基于正弦波的过零点检测正弦波信号的相位角 从编码器产生的信号。 在高速范围内，基于过零脉冲数与多个过零脉冲中的第一个和最后一个之间的时间间隔之间的比率来检测转速。 另一方面，在低速范围内，根据出现在预定时间段内的过零脉冲数与正弦波信号的相位角的组合来检测转速。
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公开(公告)号：US4468724A
公开(公告)日：1984-08-28
申请号：US365092
申请日：1982-04-02
CPC分类号： H02P23/0077 , H02M1/0845 , H02M7/1626 , H02M7/53873 , H02P7/293 , Y10S388/909
摘要： A load DC motor is supplied with a DC current through a converter principally consisting of thyristors controlled by an ON-state control signal. The load current is detected both as to the mean value and the variation in time thereof. The mean value of the load current is calculated based on the load current values detected at the time of the present On-signal and the preceding ON-signal. The difference between the reference value and the mean value of the load current is calculated, and the difference between this differential signal and the variation of the load current is further calculated, so that the timing for providing the ON-signal is calculated based on the resultant differential signal.
摘要翻译： 负载直流电动机通过主要由由导通状态控制信号控制的晶闸管组成的转换器提供直流电流。 对平均值及其时间的变化检测负载电流。 负载电流的平均值根据当前接通信号和前一个ON信号时检测到的负载电流值进行计算。 计算基准值与负载电流的平均值之差，并进一步计算该差分信号与负载电流的变动量之间的差，从而基于 产生差分信号。
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公开(公告)号：US4772996A
公开(公告)日：1988-09-20
申请号：US36862
申请日：1987-04-09
申请人： Hiroyuki Hanei , Takeshi Hanada , Kenji Kubo , Masahiko Watanabe , Tsutomu Omae , Toshihiko Matsuda
发明人： Hiroyuki Hanei , Takeshi Hanada , Kenji Kubo , Masahiko Watanabe , Tsutomu Omae , Toshihiko Matsuda
IPC分类号： H02M7/5387 , H02M7/537
CPC分类号： H02M7/53873
摘要： A PWM inverter includes a plurality of arms connected in parallel with a d.c. power source. Each arm is constituted by an upper arm and a lower arm each having a switching element. A plurality of switching control signals are continuously and alternately applied to one and the other of the two switching elements constituting the same arm respectively. In the PWM inverter, shunt resistors are connected between a minus terminal of the d.c. power source and the lower arms respectively. The PWM inverter further comprises a waveform command generating circuit generating commands representative of current waveforms to be supplied to a load, a carrier wave generating circuit and sample-hold circuits. Each of the sample-hold circuits samples and holds a terminal voltage of the associated shunt resistor in synchronism with the period of the carrier wave generated from the carrier wave generating circuit and at specific timing in a conduction period of the associated switching element.
摘要翻译： PWM逆变器包括与直流电路并联连接的多个臂。 能量源。 每个臂由具有开关元件的上臂和下臂构成。 多个开关控制信号分别连续交替地施加到构成相同臂的两个开关元件中的一个和另一个。 在PWM逆变器中，分流电阻连接在直流负载端子之间。 电源和下臂。 PWM逆变器还包括产生表示要提供给负载的电流波形的指令的波形指令产生电路，载波发生电路和采样保持电路。 每个采样保持电路与从载波产生电路产生的载波的周期和相关的开关元件的导通周期中的特定定时同步地采样并保持相关联的分流电阻器的端子电压。
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公开(公告)号：USD482698S1
公开(公告)日：2003-11-25
申请号：US29174821
申请日：2003-01-24
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公开(公告)号：US06435036B1
公开(公告)日：2002-08-20
申请号：US09904545
申请日：2001-07-16
申请人： Toshisuke Sakai , Toshihiko Matsuda , Kazuyuki Kasahara , Yasumasa Fukami , Takashi Ehara , Motohiko Matsuguma , Yasuhiko Ezaki , Masashi Yamaguchi
发明人： Toshisuke Sakai , Toshihiko Matsuda , Kazuyuki Kasahara , Yasumasa Fukami , Takashi Ehara , Motohiko Matsuguma , Yasuhiko Ezaki , Masashi Yamaguchi
IPC分类号： G01F132
CPC分类号： G01F1/329 , G01F1/3245
摘要： A vortex flow meter includes a measuring tube in which a fluid is carried, a vortex generator provided in the measuring tube for developing a Karman vortex in the fluid, a magnetic field generator generating a magnetic field across the measuring tube downstream of the vortex generator, a pair of electromotive force measuring electrodes provided downstream of the vortex generator for measuring an electromotive force generated by the Karman vortex passing across the magnetic field, a pair of reference electrodes provided at locations upstream and downstream of the electromotive force measuring electrodes, respectively, for measuring a potential at each location, and a detector circuit electrically connected to the electromotive force measuring electrodes and the reference electrodes for calculating the flow of the fluid from the electromotive force and the potential measured by the reference electrodes. The flow is calculated by subtracting the potential difference of the reference potential measuring electrodes from the electromotive force measured by the electromotive force measuring electrodes. This allows the flow meter to have an increased measuring range, meet a wide range of flow conditions, have a simple construction, and have measurement accuracy.
摘要翻译： 涡流流量计包括其中载有流体的测量管，设置在测量管中用于在流体中显影卡曼涡流的涡流发生器，产生涡流发生器下游的测量管的磁场的磁场发生器， 设置在涡流发生器下游的一对电动势测量电极，用于测量由穿过磁场的卡门涡流产生的电动势，分别设置在电动势测量电极的上游和下游的一对参考电极，用于 测量每个位置处的电位，以及电连接到电动势测量电极和参考电极的检测器电路，用于从电动势计算流体的流量和由参考电极测量的电位。 通过从由电动势测量电极测量的电动势中减去参考电位测量电极的电位差来计算流量。 这允许流量计具有增加的测量范围，满足宽范围的流动条件，具有简单的结构，并且具有测量精度。
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8.发明授权
公开(公告)号：US6078454A
公开(公告)日：2000-06-20
申请号：US573319
申请日：1995-12-15
申请人： Tsuyoshi Takahashi , Toshihiko Matsuda , Takehiko Tsuboi , Koji Ikenoya , Yukio Abe , Koji Ishii , Tomoo Furukawa , Hiroyuki Kobayashi
发明人： Tsuyoshi Takahashi , Toshihiko Matsuda , Takehiko Tsuboi , Koji Ikenoya , Yukio Abe , Koji Ishii , Tomoo Furukawa , Hiroyuki Kobayashi
IPC分类号： G11B5/09 , G11B5/00 , G11B5/012 , G11B5/03 , G11B5/39 , G11B5/48 , G11B5/56 , G11B5/596 , G11B21/10 , G11B33/14
CPC分类号： G11B5/012 , G11B21/106 , G11B5/56 , G11B2005/0018 , G11B33/14 , G11B5/4886
摘要： When a combination head is on-tracked to an arbitrary cylinder position, a head position controller corrects a head position so as to eliminate an offset amount derived from an offset table. A bias current setting circuit obtains a current set value corresponding to an offset correction amount from a bias current table and supplies the bias current according to the current set value to an MR head. As kinds of offsets, there are a yaw angle offset, a thermal offset, and a core deviation offset.
摘要翻译： 当组合磁头跟踪到任意气缸位置时，磁头位置控制器校正磁头位置，以消除从偏移表导出的偏移量。 偏置电流设定电路从偏置电流表获得与偏移校正量对应的电流设定值，并根据当前设定值将偏置电流提供给MR磁头。 作为偏移类型，存在偏航角偏移，热偏移和磁心偏移偏移。
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公开(公告)号：US07490568B2
公开(公告)日：2009-02-17
申请号：US11833814
申请日：2007-08-03
CPC分类号： D05B85/006
摘要： A bearded needle comprises a needle shank whose tip is shaped into a thin shank portion by tapering down the thickness of the needle shank. The thin shank portion has a conical projection portion at the extremity thereof. The conical projection portion has a hooking tip portion to form a hooking portion at the tip of the needle shank. The hooking portion has a substantially U-shaped bottom portion that hooks and holds a thread, and includes sloping surfaces each inclining toward an outer edge of the hooking tip portion. The sloping surfaces each extend from the bottom portion over both the conical projection portion and the hooking tip portion.
摘要翻译： 胡须针包括针柄，其尖端通过使针柄的厚度逐渐变细而成形为薄的柄部分。 薄的柄部分在其末端具有锥形突出部分。 锥形突出部具有钩针尖部，以在针柄的尖端处形成钩部。 钩挂部分具有大致U形的底部，其钩住并保持螺纹，并且包括倾斜表面，每个倾斜表面朝着钩形尖端部分的外边缘倾斜。 倾斜表面各自从锥形突出部分和钩形尖端部分上的底部延伸。
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公开(公告)号：US07255154B2
公开(公告)日：2007-08-14
申请号：US11126323
申请日：2005-05-11
申请人： Shinya Koga , Nobuyuki Goto , Tetsuya Anami , Toshihiko Matsuda
发明人： Shinya Koga , Nobuyuki Goto , Tetsuya Anami , Toshihiko Matsuda
CPC分类号： G06F1/203 , F04D29/588 , G06F2200/203 , H01L23/473 , H01L2924/0002 , H01L2924/00
摘要： A cooling device includes a heat-radiating device and a centrifugal pump provided in a closed circulation passage for circulating refrigerant. The centrifugal pump contacts and absorbs heat from heat-generating electronic parts by heat exchange of the refrigerant therein to radiate the heat via the heat-radiating device. The centrifugal pump includes a lower casing that comes into contact with the heatgenerating electronic parts, an upper casing disposed to face the lower casing to form a pump chamber, and an impeller sandwiched between the upper casing and the lower casing. The lower casing includes a recessed conical surface facing the impeller, at least one protrusion provided in a center portion of the recessed conical surface and a contact face with which the heat-generating electronic parts come into contact formed directly below the protrusion on an opposite side of the recessed conical surface.
摘要翻译： 冷却装置包括设置在用于循环制冷剂的封闭循环通道中的散热装置和离心泵。 离心泵通过其中的制冷剂的热交换而接触和吸收来自发电电子部件的热量，以通过散热装置辐射热量。 离心泵包括与发热电子部件接触的下壳体，与壳体相对配置以形成泵室的上壳体和夹在上壳体和下壳体之间的叶轮。 下壳体包括面向叶轮的凹入的圆锥形表面，设置在凹形圆锥形表面的中心部分中的至少一个突起和发热电子部件接触的接触面，形成在相对侧的突起下方 的凹入的圆锥形表面。
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