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41. 发明授权

US5444350A Process for determining the load of an asynchronous motor fed via a frequency converter and a device for carrying out the process 失效
标题翻译：用于确定通过变频器馈送的异步电动机的负载和用于执行该过程的装置的过程
公开(公告)号：US5444350A
公开(公告)日：1995-08-22
申请号：US241454
申请日：1994-05-11
申请人： Paulo Werle , Victor M. F. B. Gettschald
发明人： Paulo Werle , Victor M. F. B. Gettschald
IPC分类号： D06F37/30 , H02P23/00 , H02P23/08 , H02P27/06 , H02P1/24
CPC分类号： H02P27/06 , D06F37/304 , H02P23/0077 , H02P23/08 , D06F2202/12 , D06F2222/00 , Y02B40/52
摘要： In an asynchronous motor fed from an AC current network (A:Mp) via a frequency converter (5;6) and having an electronic control system (2;3) for controlling the operating voltage as a function of a comparison of a load-specific current signal, which can be detected by the electronic control system (2;3), with a corresponding control of the asynchronous motor (1) can be achieved with a low electronic expenditure by providing the current decay time (A.sub.1) as a load-specific current signal during which time the free-wheeling current following after voltage interruption in a motor winding path decreases by a specific degree.
摘要翻译：在通过变频器（5; 6）从交流电网络（A：Mp）馈送并具有电子控制系统（2; 3）的异步电动机中，所述电子控制系统（2; 3）用于控制作为负载 - 可以通过提供电流衰减时间（A1）作为负载，以电子消耗低的电子控制系统（2; 3）检测到的特定电流信号可以通过异步电动机（1）的相应控制来实现特定的电流信号，在此期间马达绕组路径中的电压中断之后的续流电流降低特定的程度。

42. 发明授权

US5270632A Driving system for an induction motor having a circuit for generating a slip pulse and a phase shifting pulse 失效
标题翻译：具有用于产生滑差脉冲和相移脉冲的电路的感应电动机的驱动系统
公开(公告)号：US5270632A
公开(公告)日：1993-12-14
申请号：US855704
申请日：1992-05-07
申请人： Mitsuhiko Hirota , Tadashi Inoue
发明人： Mitsuhiko Hirota , Tadashi Inoue
IPC分类号： H02P27/08 , H02P23/08 , H02R7/00
CPC分类号： H02P23/0027 , H02M7/53871 , H02P23/08
摘要： A driving system for an induction motor which is capable of properly controlling the speed of an induction motor over its high-speed revolution range and also features an excellent responsiveness to a speed command. In this system, a slip pulse (SSP) and a phase shifting pulse (FSP) are calculated by a slip pulse generator circuit (20) and a phase shifting pulse generator circuit (21) in accordance with slip pulse data (SB) and phase shifting pulse data (FB) which are calculated by a processor (1) in accordance with the speed command and an output of a speed detector. A counter (24) issues the first changeover signal (CS1) each time it receives a specified number of pulses from a pulse overlapping circuit (23). The first changeover signal corresponds to a feedback pulse calculated in accordance with the output of the speed detector and also to the slip pulse and the phase shifting pulse added. A square wave output circuit (26) generates square wave signals (Us through Ws) in accordance with the first changeover signal, the second changeover signal (CS2), which is obtained by delaying the first changeover signal, and rotational direction identifying signals (RS, RS) received from the pulse overlapping circuit. While the motor is running at high speed, the drive of the motor is controlled in accordance with the square wave signals; while it is running at low speed, PWM signals (Up through Wp) generated by the processor are used in place of the square wave signals.
摘要翻译： PCT No.PCT / JP91 / 01161 Sec。 371日期：1992年5月7日 102（e）日期1992年5月7日PCT提交1991年8月30日PCT公布。 WO92 / 04763 PCT出版物日期：1992年3月19日。一种用于感应电机的驱动系统，其能够在高速旋转范围内适当地控制感应电动机的速度，并且还具有对速度指令的优异响应性。在该系统中，通过滑差脉冲发生器电路（20）和相移脉冲发生器电路（21）根据滑差脉冲数据（SB）和相位来计算滑差脉冲（SSP）和移相脉冲（FSP）根据速度指令和速度检测器的输出由处理器（1）计算的移位脉冲数据（FB）。每当从脉冲重叠电路（23）接收到指定数量的脉冲时，计数器（24）发出第一切换信号（CS1）。第一切换信号对应于根据速度检测器的输出计算的反馈脉冲，以及相加的滑移脉冲和相移脉冲。方波输出电路26根据第一转换信号，通过延迟第一转换信号而获得的第二转换信号（CS2）和旋转方向识别信号（...）产生方波信号（Us通过＆amp;上升和下降沿） RS，＆upbar＆RS）从脉冲重叠电路接收。电机高速运转时，根据方波信号控制电机的驱动; 当它以低速运行时，由处理器产生的PWM信号（Up through＆upbar＆Wp）代替方波信号。

43. 发明授权

US4965847A Method and apparatus for detecting deviation of motor speed from frequency of power supply 失效
标题翻译：用于检测电机速度与电源频率的偏差的方法和装置
公开(公告)号：US4965847A
公开(公告)日：1990-10-23
申请号：US304527
申请日：1989-01-31
申请人： Keith O. Jurkowski , David C. Wycoff
发明人： Keith O. Jurkowski , David C. Wycoff
IPC分类号： H02P23/08
CPC分类号： H02P23/08 , Y10S388/903
摘要： An adjustable frequency motor drive system for a hoist is disclosed in which the frequency of the power supply to the motor can be selectively varied and the speed of the motor will follow the varying frequency at a slip speed relative to the frequency. The slip speed of the motor may not exceed a value beyond which the motor can control the hoist load. Accordingly, a frequency value based on the frequency of the power supply to the motor is selected as the frequency which is not to be exceeded by the motor speed expressed as a frequency. Signals representative of the actual motor speed and the selected frequency value are compared and, if the signal representative of the motor speed exceeds the signal representative of the frequency value which is not to be exceeded, an output signal is produced which may be used to apply a brake which stops and holds the motor and hoist and thereby maintains the load suspended. A motor speed deviation time period may also be provided and the hoist brake not applied to the motor until the time period is exceeded.
摘要翻译：公开了一种用于提升机的可变频电动机驱动系统，其中可以选择性地改变对电动机的供电频率，并且电动机的速度将以相对于频率的滑动速度跟随变化的频率。电机的滑差速度可能不超过电机可以控制起重负荷的值。因此，选择基于向电动机供电的频率的频率值作为表示为频率的电动机速度不超过的频率。比较代表实际电动机速度和所选频率值的信号，并且如果表示电动机速度的信号超过表示不超过的频率值的信号，则产生可用于应用的输出信号制动器停止并保持电动机和起重机，从而保持负载悬挂。还可以提供电动机转速偏差时间段，并且在超过时间段之前将起重机制动器不施加到电动机。

44. 发明授权

US4713595A Control apparatus for elevator 失效
标题翻译：电梯控制装置
公开(公告)号：US4713595A
公开(公告)日：1987-12-15
申请号：US885761
申请日：1986-07-15
申请人： Masashi Yonemoto
发明人： Masashi Yonemoto
IPC分类号： H02P27/06 , B66B1/28 , H02P23/08 , H02P3/18 , B66B1/32
CPC分类号： H02P23/08 , B66B1/308
摘要： In an elevator driven by an induction motor and having a slip control device for generating a slip frequency command signal on the basis of an error between a speed command value and a running speed value of the induction motor so as to control a VVVF type inverter which in turn provides a corresponding alternating current of variable voltage and frequency, the inverter having a smoothing capacitor on a D-C side thereof, a control apparatus for stabilizing torque of the induction motor by smoothly changing operation of the induction motor from a powering mode to a regenerative mode, the control apparatus comprising a current detector for detecting charging current of the smoothing capacitor having a portion for detecting polarity of the slip frequency command signal and a unit responsive to the charging current detected by the current detector and the slip frequency command signal generated by the slip control device for changing operation of the induction motor from the powering mode to the regenerative mode only when a voltage value based on the charging current has exceeded a preset reference voltage value after a negative sign of the slip frequency command signal is detected by the polarity detection portion.
摘要翻译：在由感应电动机驱动的电梯中，具有用于根据感应电动机的速度指令值和行驶速度值之间的误差产生转差指令信号的滑差控制装置，以便控制VVVF型逆变器，进而提供可变电压和频率的相应交流电，该逆变器在其直流侧具有平滑电容器，用于通过将感应电动机的动作从供电模式平滑地改变为再生的稳定转矩来控制感应电动机的转矩的控制装置模式，所述控制装置包括用于检测所述平滑电容器的充电电流的电流检测器，所述电流检测器具有用于检测转差频率指令信号的极性的部分，以及响应于由电流检测器检测的充电电流的单元和由所述滑动控制装置用于改变所述感应电动机从所述供电模式的操作只有当极性检测部分检测到转差频率指令信号的负号后，当基于充电电流的电压值已经超过预设的参考电压值时才进入再生模式。

45. 发明授权

US4625834A Speed control apparatus for elevator 失效
标题翻译：电梯调速装置
公开(公告)号：US4625834A
公开(公告)日：1986-12-02
申请号：US705698
申请日：1985-02-26
申请人： Tooru Tanahashi
发明人： Tooru Tanahashi
IPC分类号： B66B1/30 , H02P23/08 , H02P27/06
CPC分类号： H02P23/08 , B66B1/30
摘要： In an elevator speed control apparatus wherein an output signal of a speed detector is sampled at a predetermined interval, and an output signal obtained by processing the sampling is applied to an inverter so as to perform a slip frequency control of an induction motor; correction means to receive the speed detector output signal sampled at the predetermined interval, to differentiate it to generate a differential signal and to deliver the differential signal as a correction signal is provided, so that a magnitude by which a rotational speed of the induction motor changes after the output signal of the speed detector has been fed into a microcomputer until the control signal is applied to the inverter is corrected, whereupon the signal for the speed control is delivered to the inverter, thereby to correct the lag of speed detection attributed to the sampling control.
摘要翻译：在电梯速度控制装置中，其中速度检测器的输出信号以预定间隔进行采样，并且通过处理采样获得的输出信号被施加到逆变器，以便执行感应电动机的转差频率控制; 校正装置，用于接收以预定间隔采样的速度检测器输出信号，以区分其产生差分信号并提供作为校正信号的差分信号，使得感应电动机的转速变化的幅度在速度检测器的输出信号已经馈送到微型计算机中之前，直到控制信号被施加到逆变器被校正为止，由此将用于速度控制的信号传送到逆变器，从而校正归因于抽样控制。

46. 发明授权

US4625159A Control apparatus for elevator 失效
标题翻译：电梯控制装置
公开(公告)号：US4625159A
公开(公告)日：1986-11-25
申请号：US812712
申请日：1985-12-23
申请人： Hiroyuki Ikejima
发明人： Hiroyuki Ikejima
IPC分类号： H02P27/06 , B66B1/30 , H02P3/18 , H02P21/00 , H02P23/08 , H02P27/04 , H02P5/34
CPC分类号： B66B1/30 , H02P23/08
摘要： A voltage detector detects the terminal voltage of a smoothing capacitor which is disposed between a converter for generating direct current and an inverter for generating alternating current. The presence and magnitude of regenerative power to the converter is judged by the detecting operation, and when the terminal voltage of the smoothing capacitor has risen, a power control device decreases the slip of an induction motor in succession, whereby the regenerative power is suppressed to zero.
摘要翻译：电压检测器检测设置在用于产生直流电的转换器和用于产生交流电的逆变器之间的平滑电容器的端子电压。通过检测动作来判断转换器的再生电力的存在和大小，并且当平滑电容器的端子电压上升时，功率控制装置依次减小感应电动机的滑动，从而将再生电力抑制到零。

47. 发明授权

US4499414A AC Motor control method 失效
标题翻译：交流电机控制方式
公开(公告)号：US4499414A
公开(公告)日：1985-02-12
申请号：US438692
申请日：1982-11-02
申请人： Yoshiki Fujioka , Mitsuhiko Hirota
发明人： Yoshiki Fujioka , Mitsuhiko Hirota
IPC分类号： H02P21/00 , H02P23/08 , H02P27/04 , H02P27/06 , H02P5/40
CPC分类号： H02P23/08
摘要： A method of controlling an AC motor which exhibits a constant torque characteristic at a rotational speed N below a base speed Nb and a constant output characteristic at a rotational speed N above the base speed Nb, comprising the steps of finding a base speed N.sub.L after limiting the output power of the AC motor, N.sub.L being derived from the base speed Nb and the ratio .eta. between maximum output power Pmax.sub.1 and maximum output power Pmax.sub.2 before and after the output power of the AC is limited, respectively, rendering the slip frequency of the AC motor constant until the rotational speed N of the AC motor reaches the base speed N.sub.L, varying the slip frequency in inverse proportion to the rotational speed N for N between N.sub.L and Nb (N.sub.L
摘要翻译：一种控制交流电动机的方法，其以低于基本速度Nb的转速N和在基本速度Nb以上的转速N下的恒定输出特性呈现恒定的转矩特性，包括以下步骤：在限制之后找到基本速度NL 交流电动机的输出功率NL从基本速度Nb导出，并且AC输出功率之前和之后的最大输出功率Pmax1和最大输出功率Pmax2之间的比值ηa分别被限制，交流电动机常数直到交流电动机的转速N达到基本速度NL，使转差频率与NL和Nb之间的N的转速N成反比（NL

48. 发明授权

US4484129A Speed control apparatus for polyphase induction motors 失效
标题翻译：多相异步电机调速装置
公开(公告)号：US4484129A
公开(公告)日：1984-11-20
申请号：US551140
申请日：1983-11-14
申请人： Tadahiro Ono
发明人： Tadahiro Ono
IPC分类号： H02P21/00 , H02P23/08 , H02P27/04 , H02P27/06 , H02P5/40
CPC分类号： H02P23/08
摘要： In a speed control system of a three phase induction motor, a resolver is connected to the rotor of the motor for producing a phase modulated signal Esin (.omega.t+.theta.) containing the rotational angle .theta.. This signal is converted into a speed signal K.sub.2 E(d.theta./dt) which is compared with a speed instruction signal to produce an error signal. The error signal is multiplied with the phase modulated signal and the product is rectified with three synchronous rectifier units respectively controlled by three reference signals having phase differences of 0, 2.pi./3 and 4.pi./3 for producing three phase voltages applied to the stator winding of the induction motor. The control system enables to control the speed while maintaining the slip frequency at a constant value.
摘要翻译：在三相感应电动机的速度控制系统中，旋转变压器连接到电动机的转子，用于产生包含旋转角度θ的相位调制信号Esin（ω-t + theta）。该信号被转换成与速度指令信号进行比较以产生误差信号的速度信号K2E（dθ/ dt）。误差信号与相位调制信号相乘，乘积由三个同步整流单元进行整流，三个同步整流单元分别由具有0,2 pi / 3和4 pi / 3的相位差的三个参考信号控制，以产生施加到定子的三相电压感应电动机绕组。控制系统能够控制速度，同时将滑差频率保持在恒定值。

49. 发明授权

US4088935A Stabilizing scheme for an a-c electric motor drive system 失效
标题翻译： a-c电动机驱动系统的稳定方案
公开(公告)号：US4088935A
公开(公告)日：1978-05-09
申请号：US729441
申请日：1976-10-04
申请人： John D. D'Atre , Allan B. Plunkett
发明人： John D. D'Atre , Allan B. Plunkett
IPC分类号： H02P23/08 , H02P5/40
CPC分类号： H02P23/08
摘要： For use with an adjustable speed a-c electric motor comprising a stator having effective direct and quadrature axes and a rotor spaced from the stator by a gap, said stator including windings adapted to be connected to a source of excitation of variable frequency and amplitude, a scheme is provided that comprises means for deriving a "torque angle" feedback signal representative of the phase angle between current and flux that interact in the motor to develop electromagnetic torque tending to move the rotor relative to the stator, in combination with means responsive to the torque angle feedback signal for controlling the source of excitation so as to control the frequency of stator excitation as a function of the torque angle feedback signal. In one aspect of the invention, means is provided for controlling the source of excitation so as to control the amplitude of stator excitation as a function of a variable command signal that is prevented from deviating below a predetermined limit. In another aspect of the invention, the torque angle feedback signal deriving means comprises phase discriminating means arranged to produce a signal representative of the complement of the electrical phase displacement between first and second periodic signals, the first periodic signal being synchronized with the fundamental component of the actual flux produced across the stator-rotor gap in a predetermined one of said stator axes and said second periodic signal being synchronized with the fundamental stator winding current in the other stator axis.
摘要翻译：为了与包括具有有效的直接和正交轴的定子和通过间隙与定子隔开的转子的可调速交流电动机一起使用，所述定子包括适于连接到可变频率和振幅的激励源的绕组，提供了包括用于导出表示在电动机中相互作用的电流和通量之间的相位角的“扭矩角”反馈信号的装置，以产生趋向于相对于定子移动转子的电磁转矩，以及响应扭矩的装置角度反馈信号，用于控制激励源，以便根据转矩角反馈信号来控制定子励磁的频率。在本发明的一个方面，提供了用于控制激励源的装置，以便根据防止偏离到预定极限的可变指令信号来控制定子激励的振幅。在本发明的另一方面，扭矩角反馈信号导出装置包括相位识别装置，其被配置为产生表示第一和第二周期信号之间的电相位移补数的信号，第一周期信号与基本分量在预定的所述定子轴线和所述第二周期信号中的定子 - 转子间隙上产生的实际磁通量与另一个定子轴线中的基本定子绕组电流同步。

50. 发明授权

US4039914A Dynamic braking in controlled current motor drive systems 失效
标题翻译：控制电机驱动系统动态制动
公开(公告)号：US4039914A
公开(公告)日：1977-08-02
申请号：US635143
申请日：1975-11-25
申请人： Robert L. Steigerwald , Edward P. Cornell
发明人： Robert L. Steigerwald , Edward P. Cornell
IPC分类号： H02P3/18 , H02P3/22 , H02P23/08 , H02P27/06 , H02P3/12
CPC分类号： H02P23/08 , H02P3/22
摘要： A current source power converter for an electric motor is comprised by a combined controlled rectifier and chopper which is coupled to a controlled-current inverter by a dc reactor. In the motoring mode the combined rectifier and chopper functions as a phase controlled rectifier to control the current magnitude. In the dynamic braking mode a line switch is opened and a braking resistor placed across the rectifier output, and the combined rectifier and chopper is operated as a chopper to control the average voltage across the braking resistor and thus the current magnitude during braking.

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