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公开(公告)号：US4268782A
公开(公告)日：1981-05-19
申请号：US940279
申请日：1978-09-07
申请人： Shigeki Kawada , Yoshiki Fujioka , Mitsuhiko Hirota , Naoto Ohta
发明人： Shigeki Kawada , Yoshiki Fujioka , Mitsuhiko Hirota , Naoto Ohta
CPC分类号： H02P7/293 , Y10S388/902 , Y10S388/91 , Y10S388/915 , Y10S388/93
摘要： A system for controlling DC motors of the type employing permanent magnets as field poles. The firing phase angle of a thyristor is controlled in response to an error signal representative of an error between a commanded motor speed and an actual motor speed. For preventing demagnetization of the permanent magnets due to the armature reaction, the clamp level of the error signal is changed in accordance with the actual motor speed.
摘要翻译： 用于控制使用永磁体作为场极的类型的直流电动机的系统。 响应于表示指令的电动机速度和实际电动机速度之间的误差的误差信号来控制晶闸管的触发相位角。 为了防止由于电枢反应导致的永磁体的退磁，误差信号的钳位电平根据实际的电动机速度而变化。
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公开(公告)号：US4284939A
公开(公告)日：1981-08-18
申请号：US76548
申请日：1979-09-18
申请人： Shigeki Kawada , Yoshiki Fujioka , Naoto Ohta , Yutaka Koiwai
发明人： Shigeki Kawada , Yoshiki Fujioka , Naoto Ohta , Yutaka Koiwai
CPC分类号： H02H11/004 , G01R19/10 , G01R29/18 , G01R31/024 , H02H3/253
摘要： A device for detecting opposite phases and an open phase in an input three-phase voltage for a DC motor, wherein the input three-phase voltage is rectified by a three-phase bridge circuit and supplied to the armature of the DC motor. The input three-phase voltage is supplied to the three-phase bridge circuit when the maximum level is equal to or less than the reference voltage, while the input three-phase voltage is not supplied to the bridge circuit when the maximum level is greater than the reference voltage. In this case, both opposite phases and an open phase can be detected by using a common device. In addition, only two phases, such as U- and W-phases, are used for detecting opposite phases and an open phase no matter how these phases may be generated in any phase such as U-, V- or W-phase of the input three-phase voltage. As a result, the device is small in size, simple in electrical construction and low in cost.
摘要翻译： 一种用于在直流电动机的输入三相电压中检测相位相位和开路相位的装置，其中输入三相电压由三相桥式电路整流并提供给直流电动机的电枢。 当最大电平等于或小于参考电压时，输入三相电压被提供给三相桥式电路，而当最大电平大于输入三相电压时，输入三相电压不提供给桥式电路 参考电压。 在这种情况下，可以通过使用公共装置来检测相位相位和开路相位。 此外，只有两个相位，如U相和W相，用于检测相位相和开路相位，无论这些相位如何在任何相位中产生，例如U相，V相或W相的任何相位 输入三相电压。 结果，该装置尺寸小，电气结构简单，成本低。
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公开(公告)号：US4300079A
公开(公告)日：1981-11-10
申请号：US32672
申请日：1979-04-23
申请人： Shigeki Kawada , Yoshiki Fujioka , Naoto Ohta , Yasuo Takahasi
发明人： Shigeki Kawada , Yoshiki Fujioka , Naoto Ohta , Yasuo Takahasi
CPC分类号： H02P7/2985 , H02P23/20 , Y10S388/903 , Y10S388/917
摘要： A DC motor control system which has means for detecting the rise and fall of a drive command signal to generate an ON ACCELERATION/DECELERATION signal and means for generating a current limit signal for driving a DC motor by the ON ACCELERATION/DECELERATION signal to produce a rated output and for driving the DC motor to produce an output 1/n times the rated output when the DC motor is switched from an acceleration state to a stationary state. When the DC motor is accelerated or decelerated by the drive command signal, a current for obtaining the rated output is applied to the armature of the DC motor and, in the stationary state, even when a load on the DC motor is maximum a current for obtaining an output 1/n times the rated output is applied to the armature of the DC motor to reduce the output of the large-output DC motor, thereby providing an enlarged constant output DC motor range.
摘要翻译： 一种直流电动机控制系统，其具有用于检测驱动指令信号的上升和下降以产生ON加速/减速信号的装置，以及用于通过ON加速/减速信号产生用于驱动DC电动机的限流信号的装置， 额定输出和驱动直流电机，以在直流电机从加速状态切换到静止状态时产生1 / n倍于额定输出的输出。 当通过驱动指令信号加速或减速直流电动机时，用于获得额定输出的电流被施加到直流电动机的电枢，并且在静止状态下，即使当直流电动机上的负载最大时， 获得1 / n倍的额定输出的输出应用于直流电机的电枢，以减小大输出直流电机的输出，从而提供一个放大的恒定输出直流电动机范围。
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公开(公告)号：US4284932A
公开(公告)日：1981-08-18
申请号：US76615
申请日：1979-09-18
申请人： Shigeki Kawada , Yoshiki Fujioka , Naoto Ohta
发明人： Shigeki Kawada , Yoshiki Fujioka , Naoto Ohta
CPC分类号： H02P7/2985 , Y10S388/906 , Y10S388/917
摘要： A system for a DC motor associated with a field winding and driven by using a three-phase anti-parallel thyristor bridge circuit, comprising a first means for controlling an armature current I.sub.a flowing through an armature of the DC motor, and; a second means for controlling a field current I.sub.f flowing the field winding by obtaining the feedback values of a voltage E.sub.a of the armature and the field current I.sub.f and by changing the maximum level of the current I.sub.f in accordance with a three-phase alternating voltage V.sub.ac applied to the three-phase anti-parallel thyristor bridge circuit. In the system, when the three-phase alternating voltage V.sub.ac decreases to a value lower than a predetermined value V.sub.o, the field current I.sub.f are decreased so that the armature voltage E.sub.a is decreased.
摘要翻译： 一种用于与场绕组相关并且通过使用三相反并联晶闸管桥接电路驱动的直流电动机的系统，包括用于控制流过直流电动机的电枢的电枢电流Ia的第一装置， 用于控制励磁电流的第二装置如果通过获得电枢的电压Ea和励磁电流If的反馈值来流过励磁绕组，并且通过根据三相交流电压Vac来改变电流If的最大电平 应用于三相反并联晶闸管桥接电路。 在该系统中，当三相交流电压Vac减小到低于预定值Vo的值时，励磁电流If减小，使得电枢电压Ea减小。
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公开(公告)号：US4268781A
公开(公告)日：1981-05-19
申请号：US850793
申请日：1977-11-11
CPC分类号： H02P7/293 , Y10S388/903 , Y10S388/917
摘要： An actual speed N of a DC motor and an armature current Ia are detected to detect the motor output N.times.Ia. The motor speed is changed so that the detected motor output may not exceed a predetermined value. The spark generation of the motor brush is prevented when an over load is applied to the motor.
摘要翻译： 检测直流电动机的实际速度N和电枢电流Ia，以检测电动机输出Nx1a。 改变电动机速度，使得检测到的电动机输出不会超过预定值。 当对电动机施加过载时，防止电动机电刷产生火花。
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公开(公告)号：US4614020A
公开(公告)日：1986-09-30
申请号：US498209
申请日：1983-05-04
申请人： Shigeki Kawada , Yoshiki Fujioka
发明人： Shigeki Kawada , Yoshiki Fujioka
CPC分类号： B23B39/205 , B23Q3/15534 , B23Q3/15706 , Y10T29/49819 , Y10T29/5107 , Y10T29/5167 , Y10T408/37 , Y10T409/308232 , Y10T483/12 , Y10T483/13 , Y10T483/179
摘要： An automatic tool changing mechanism includes a spindle mechanism (11) having at least a spindle (11a) and a first gear (11b) rotatable in unison with the spindle; a spindle motor (12) for rotating the spindle; a tool magazine (20) having at least a storage unit (20b) for storing a plurality of tools (21), a second gear (20c) rotatable in unison with the storage unit, and a slider (20e) slidably mounted on the spindle mechanism; a Z-axis motor (19a) for moving the spindle mechanism in the direction of a Z-axis; a constraining member (23) for constraining the tool magazine against movement thereof in the direction of the Z-axis and a control circuit (102, 103) for controlling the indexing. During machining operation, the first and second gears are brought out of mesh with each other, and the spindle is rotated by the spindle motor at a prescribed speed to enable a tool mounted on the spindle to machine a workpiece. For changing tools, the first and second gears are held in mesh with each other, and the spindle motor is rotated by the control circuit to index to a desired new tool. An automatic tool changing method for the automatic tool changing mechanism is also provided.
摘要翻译： PCT No.PCT / JP82 / 00369 Sec。 371日期：1983年5月4日 102（e）日期1983年5月4日PCT提交1982年9月14日PCT公布。 出版物WO83 / 日期：1983年3月31日。自动换刀机构包括：主轴机构（11），其具有至少一个主轴（11a）和与主轴一体旋转的第一齿轮（11b） 主轴电动机（12），用于旋转主轴; 至少具有用于存储多个工具的存储单元（20b）的工具仓（20），与所述存储单元一体旋转的第二齿轮（20c）和可滑动地安装在所述主轴上的滑块（20e） 机制; 用于沿Z轴方向移动主轴机构的Z轴马达（19a）; 约束构件（23），用于约束所述工具仓以防止其在Z轴方向上的移动;以及控制电路（102,103），用于控制所述分度。 在加工操作期间，第一和第二齿轮彼此脱离啮合，主轴由主轴电机以规定的速度旋转，使得安装在主轴上的工具能够加工工件。 为了更换工具，第一和第二齿轮彼此啮合，主轴电动机由控制电路旋转以转向所需的新工具。 还提供了一种用于自动换刀机构的自动换刀方法。
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公开(公告)号：US4330832A
公开(公告)日：1982-05-18
申请号：US128173
申请日：1980-03-07
CPC分类号： B23Q15/10
摘要： A method of, and apparatus for, controlling the feed rate of a cutter in a machine tool of the type in which a spindle is rotated by an electric motor having operating regions of constant torque and output characteristics so as to render constant the circumferential speed of a workpiece while the workpiece is subjected concurrently to a machining operation by moving a cutter into contact therewith. The apparatus includes mechanism for computing the maximum cutter feed rate, the circumferential speed V.sub.c of the workpiece, the cutting width d of the cutter and the maximum cutting quantity Q.sub.max which is decided by the maximum power P.sub.max of the motor, mechanism for computing a spindle speed N.sub.s from the circumferential speed V.sub.c and the outer diameter D of the workpiece, mechanism for comparing the magnitudes of a base speed N.sub.b and the spindle speed N.sub.s, where the base speed N.sub.b is defined as a spindle speed at which there is a transition from the constant torque region of the motor to the constant output region thereof, and mechanism for computing the cutter feed rate f.sub.r from f.sub.r.sbsb.max,.multidot.N.sub.s and N.sub.b. The cutter is fed at the rate f.sub.r.sbsb.max when N.sub.s .gtoreq.N.sub.b and at the rate f.sub.r when N.sub.s
摘要翻译： 一种用于控制机床中的切割器的进给速度的方法和装置，其中通过具有恒定扭矩和输出特性的操作区域的电动机来旋转主轴，使得主轴的转速恒定， 同时通过使切割器与其接触而同时进行加工操作的工件。 该装置包括用于计算最大切割器进给速度，工件的圆周速度Vc，切割器的切割宽度d和由马达的最大功率Pmax决定的最大切割量Qmax的机构，用于计算主轴的机构 从工件的圆周速度Vc和外径D的速度Ns，将基准速度Nb的大小与主轴转速Ns进行比较的机构，其中基本速度Nb被定义为从 电动机的恒定转矩区域到其恒定输出区域，以及用于从frmax，xNs和Nb计算切割器进给速率fr的机构。 当Ns> / = Nb时，刀具以速率frmax进给，并且当Ns
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公开(公告)号：US4207504A
公开(公告)日：1980-06-10
申请号：US940334
申请日：1978-09-07
IPC分类号： B23Q5/20 , B23Q15/00 , B23Q15/26 , G05B19/39 , G05D3/00 , G05D3/12 , H02P3/04 , H02P3/06 , G05B13/00
CPC分类号： G05B19/39 , B23Q15/26 , G05B2219/34388 , G05B2219/37313 , G05B2219/37314 , G05B2219/42104 , G05B2219/45136 , G05B2219/50031
摘要： A speed detector produces a spindle speed signal proportional to the revolving speed of a spindle. A specified position detector provides a specified position signal when the spindle assumes a specified rotational position. A spindle motor speed control unit controls the spindle motor so that the motor speed agrees with a speed command. When spindle orientation is requested, one integrator circuit responds to the specified position signal to integrate the spindle speed signal. The output from the integrator circuit is applied to the speed control unit in place of the speed command.
摘要翻译： 速度检测器产生与主轴转速成正比的主轴转速信号。 当主轴承受指定的旋转位置时，指定的位置检测器提供指定的位置信号。 主轴电机速度控制单元控制主轴电机，使电机转速符合速度指令。 当要求主轴定向时，一个积分器电路响应指定的位置信号以整合主轴转速信号。 来自积分器电路的输出被代替速度指令应用于速度控制单元。
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公开(公告)号：US4538084A
公开(公告)日：1985-08-27
申请号：US604354
申请日：1984-04-20
摘要： Through holes (11, 12, 13 . . . ) are made at predetermined locations of a stator core (1). Reinforcing bars are inserted thereinto while fixed to the stator core by welding (81, 82, 83 . . . ). The stator core is supported between a front bracket (31) and a rear bracket (32) from both sides. Front side tap bolts (91, 92, 93 . . . ) and rear side tap bolts (61, 62, 63 . . . ) are engaged through the front bracket and the rear bracket with internal threads of both ends of the reinforcing bars, thereby fixing in place the stator core, front bracket, and rear bracket. By the foregoing structure, it is possible to improve the heat radiation action of a stator core, and also achieve a compacter motor.
摘要翻译： PCT No.PCT / JP83 / 00275 Sec。 1984日期1984年4月20日 102（e）日期1984年4月20日PCT提交1983年8月24日PCT公布。 出版物WO84 / 01061 日期为1984年3月15日。通孔（11,12,13 ...）在定子铁芯（1）的预定位置处制成。 通过焊接（81,82,83 ...）将固定杆插入其中，同时固定在定子芯上。 定子芯从两侧支撑在前托架（31）和后托架（32）之间。 前侧抽头螺栓（91,92,93 ...）和后侧抽头螺栓（61,62,63 ...）通过前支架和后支架与钢筋两端的内螺纹接合， 从而固定定子芯，前支架和后支架。 通过上述结构，能够提高定子铁芯的散热动作，并且能够实现电动马达。
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公开(公告)号：US4482854A
公开(公告)日：1984-11-13
申请号：US433103
申请日：1982-10-06
申请人： Shigeki Kawada , Hiroshi Ishida , Shinichi Kouno
发明人： Shigeki Kawada , Hiroshi Ishida , Shinichi Kouno
摘要： An inverter circuit having a bridge circuit comprising a plurality of switching elements connected in the form of a bridge for converting, into alternating current, a DC voltage produced by a DC voltage generating unit and which is received through a first switching circuit. The inverter circuit includes a pair of diodes and a spike absorbing capacitor which constitute a series network wherein the diodes are connected so as to be forward biased with respect to the DC voltage and the spike absorbing capacitor is connected between the diodes. The series network is connected in parallel with the bridge circuit and is connected to the DC voltage generating unit through the first switching circuit. The spike absorbing capacitor is connected in parallel with a smoothing capacitor of the DC voltage generating unit.
摘要翻译： 一种逆变器电路，具有桥式电路，该桥式电路包括以桥形式连接的多个开关元件，用于将由直流电压产生单元产生的直流电压转换为交流电流，并通过第一开关电路接收。 逆变器电路包括构成串联网络的一对二极管和尖峰吸收电容器，其中二极管相对于直流电压被正向偏置，并且尖峰吸收电容器连接在二极管之间。 串联网络与桥式电路并联连接，并通过第一开关电路连接到直流电压产生单元。 尖峰吸收电容器与直流电压产生单元的平滑电容器并联连接。
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