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公开(公告)号：US5938052A
公开(公告)日：1999-08-17
申请号：US750584
申请日：1997-05-15
CPC分类号： B66C13/063
摘要： An object of this invention is to provide a high performance and low cost crane rope steadying control method and apparatus for which mechanical or optical swing angle detecting means are not necessary.The invention provides a rope steadying control method for a crane or the like having a trolley driving apparatus for causing a load suspended by a rope of a crane or the like to travel, wherein swinging of a load suspended by a rope is stopped by calculating a swing load signal I.sub.2W * proportional to the rope swing angle and the load by computationally estimating a motor torque estimate signal .tau..sub.M * not including load torque fluctuations caused by swinging of the rope on the basis of gain coefficients and equivalent time constants of the control system and the drive system, and comparing this estimate signal .tau..sub.M * with an actual load torque .tau..sub.M and negatively feeding back to a trolley speed command N.sub.S of the trolley driving apparatus (1) a speed signal N.sub.W produced by carrying out phase lead/lag compensation on the difference between a swing angle detection estimated value .theta..sub.1 * proportional to this swing load signal and a swing angle set value .eta..sub.S.
摘要翻译： PCT No.PCT / JP96 / 01132 Sec。 371日期1997年5月15日 102（e）日期1997年5月15日PCT提交1996年4月25日PCT公布。 公开号WO96 / 33943 日期1996年10月31日本发明的目的是提供一种不需要机械或光学摆动角度检测装置的高性能和低成本的起重机绳索稳定控制方法和装置。 本发明提供了一种用于起重机等的绳索稳定控制方法，其具有用于使由起重机等的绳索悬挂的负载行进的小车驱动装置，其中通过计算一个起重机来停止由绳索悬挂的负载的摆动 基于控制系统的增益系数和等效时间常数，通过计算估计马达转矩估计信号τM *而不包括由绳索的摆动引起的负载转矩波动而与绳索摆动角度和负载成比例的摆动负载信号I2W * 和驱动系统，并且将该估计信号τM *与实际负载转矩τM进行比较，并将其反馈到手推车驱动装置（1）的小车速度指令NS，以通过执行相位超前/滞后而产生的速度信号NW 与该摆动负载信号成比例的摆动角度检测估计值θ1 *与摆动角度设定值eta S之间的差的补偿
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公开(公告)号：US06599095B1
公开(公告)日：2003-07-29
申请号：US09959515
申请日：2001-10-29
申请人： Noriyuki Takada , Takayuki Yamakawa , Hidetoshi Ryu , Tetsuo Kawano , Koji Kawamoto , Toshio Miyano , Richard L. Pratt , Brian Mackinnon
发明人： Noriyuki Takada , Takayuki Yamakawa , Hidetoshi Ryu , Tetsuo Kawano , Koji Kawamoto , Toshio Miyano , Richard L. Pratt , Brian Mackinnon
IPC分类号： F04B1924
CPC分类号： F04B47/02 , F04B49/065 , F04B2201/0202 , F04B2203/0201 , F04B2203/0204
摘要： A pump off control method comprises detecting the speed of the induction motor and an instantaneous value of secondary current of the induction motor. Down stroke time in every cycle of the pump jack is detected. An average value of instantaneous values of the secondary current of the induction motor in the down stroke time in said every cycle is calculated. An average value reference of the secondary current of the induction motor to be compared with calculated average value of the instantaneous values of the secondary current of the induction motor is set. The calculated average value of the instantaneous values of the secondary current is compared with the average value reference after the down stroke end in each cycle. An occurence of pump off is detected if the calculated average value of the instantaneous values is greater than the average value reference.
摘要翻译： 抽油机控制方法包括检测感应电动机的速度和感应电动机的次级电流的瞬时值。 检测到泵千斤顶的每个周期的下降时间。 计算出所述每个周期中的下行时间内的感应电动机的次级电流的瞬时值的平均值。 设定与感应电动机的二次电流的瞬时值的计算平均值进行比较的感应电动机的次级电流的平均值基准。 将计算出的次级电流的瞬时值的平均值与在每个周期中的下行程结束之后的平均值参考值进行比较。 如果所计算的瞬时值的平均值大于平均值参考值，则检测到泵送的发生。
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公开(公告)号：US6121748A
公开(公告)日：2000-09-19
申请号：US214918
申请日：1999-01-11
申请人： Takayuki Yamakawa , Toshio Miyano
发明人： Takayuki Yamakawa , Toshio Miyano
CPC分类号： H02P23/14 , H02P21/09 , H02P23/08 , Y02P80/116
摘要： In an inverter controlling method for an induction motor, the slip of the motor is detected and an optimum slip which is dependent on the motor constant and the frequency supplied to the motor providing the highest efficiency is calculated, and a voltage manipulated variable is determined from a comparison of the optimum slip and the slip of the motor, and then the voltage manipulated variable is used to form an output voltage instruction or a magnetic flux instruction so that running of the induction motor is controlled with the slip with which the highest efficiency is provided with respect to load variation and frequency variation.
摘要翻译： PCT No.PCT / JP97 / 02374。 371日期1999年1月11日 102（e）日期1999年1月11日PCT提交1997年7月9日PCT公布。 公开号WO98 / 02958 日期1998年1月22日在感应电动机的变频器控制方法中，检测电动机的滑移，并计算取决于电动机常数和提供给提供最高效率的电动机的频率的最佳滑差，并且电压 通过比较最佳滑差和电动机滑差来确定操纵变量，然后使用电压调节变量来形成输出电压指令或磁通指令，使感应电动机的运行通过滑差来控制 相对于负载变化和频率变化提供最高的效率。
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公开(公告)号：US5731682A
公开(公告)日：1998-03-24
申请号：US505202
申请日：1996-05-10
申请人： Takayuki Yamakawa
发明人： Takayuki Yamakawa
CPC分类号： H02P27/06 , H02M7/48 , H02P23/26 , H02P27/047 , Y02P80/116
摘要： A control unit for a motor and a control method for it, which are adapted for conducting control at a high speed so that efficiency of the motor by inverter operation of an induction motor is maximum at all times. This unit comprises means (3) for detecting effective power delivered to a motor (14), calculation means (1, 2, 4, 5, 6, 7, 8 16, S.sub.1, S.sub.2, S.sub.3) for calculating, from the detected effective power and frequency (f) of an A.C. voltage delivered to motor (14), supply voltage (V.sub.1) to motor (14) where efficiency of motor (14) becomes maximum, and means (9, 10, 11, 12) for delivering the calculated supply voltage (V.sub.1) to motor (14).
摘要翻译： PCT No.PCT / JP94 / 02078 Sec。 371日期：1996年5月10日 102（e）日期1996年5月10日PCT 1994年12月9日PCT公布。 WO95 / 19065 PCT公开 日期1995年7月13日用于电动机的控制单元及其控制方法，其适于高速进行控制，从而始终使感应电动机的变频器运行的效率最大化。 该单元包括用于检测传送到电动机（14）的有效功率的装置（3），用于根据检测到的有效值计算计算装置（1,2,4,5,6,7,816，S1，S2，S3） 输出到电动机（14）的交流电压的功率和频率（f），电动机（14）的效率变得最大的电动机（14）的电源电压（V1）以及用于输送电动机的装置（9,10,11,12） 计算出的电动机电压（V1）到电动机（14）。
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公开(公告)号：US5488787A
公开(公告)日：1996-02-06
申请号：US284410
申请日：1994-08-03
申请人： Yukio Aoyagi , Kazuhiko Otsubo , Gen Yasuda , Koji Fujita , Takayuki Yamakawa , Kazuyoshi Narita
发明人： Yukio Aoyagi , Kazuhiko Otsubo , Gen Yasuda , Koji Fujita , Takayuki Yamakawa , Kazuyoshi Narita
CPC分类号： E02F9/226 , E02F9/2217 , E02F9/2246
摘要： When a prime mover (1) is driven, a controller (25) outputs an open-drive signal for bringing an opening/shutting valve (23) into an open position and, upon a control lever (68, etc.) being operated, a hydraulic fluid is supplied from an auxiliary hydraulic pump (7) through pressure reducing valves to driving sectors of directional control valves (8 to 16) for shifting them. A flow rate and a direction of flow of the hydraulic fluid from main hydraulic pumps (3, 4) are thereby adjusted so that actuators (57A, 57B, 57C, 56A, 54) can be each operated at a speed depending on the amount by which the control lever is operated. When one of the actuators (57A, 57B, 57C, 56A, 54) is to be driven when the prime mover (1) is not driven, an open command is selected in a selection command device (24), whereupon the controller (25) outputs the open-drive signal, causing the opening/shutting valve (23) to open a line interconnecting the accumulator (21) and the pressure reducing valve (17), etc. By now operating the control lever (68), for example, the directional control valve (9) is shifted so that a boom cylinder (57A) is operated with the dead weight of a working unit to allow a descent thereof. When any of the actuators (57A, 57B, 57C, 56A, 54) is not to be driven when the prime mover (1) is in a stopped state, a shut command is selected in the selection command device (24), whereupon the controller (25) outputs a shut-drive signal, causing the opening/shutting valve (23) to shut off the line interconnecting the accumulator (21) and the pressure reducing valve (17). Even if the control lever (68), etc. are touched by a mistake under such a condition, no actuators (57A, 57B, 57C, 56A, 54) are operated and the working unit is not descended. Thus, the actuators are surely prevented from being operated against the intention of an operator.
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