公开(公告)号：US06538402B2

公开(公告)日：2003-03-25

申请号：US09758237

申请日：2001-01-12

申请人： Halit S. Gokturk ,  Satoshi Nakayama ,  Kozo Kawai ,  Hideaki Abe ,  Toyokatsu Okamoto

发明人： Halit S. Gokturk ,  Satoshi Nakayama ,  Kozo Kawai ,  Hideaki Abe ,  Toyokatsu Okamoto

IPC分类号： H02K3304

CPC分类号： H02P25/032

摘要： An improved self-oscillation system for a linear oscillatory actuator composed of a stator and a reciprocator. The stator carries a winding to which an electric current is periodically supplied for making a resonant oscillation of the reciprocator. The system includes a self-oscillation circuit for continuing the resonant oscillation of the actuator by a positive feedback manner based upon a back electromotive force (Vbemf) appearing across the winding. The system further includes a PWM control for increasing the electric current in response to a decreasing oscillation amplitude due to an increasing load applied to the reciprocator. A detector circuit is included to monitor the oscillation amplitude of the reciprocator and provides a corresponding detector output in response to which the self-oscillation circuit provides a drive pulse of varying pulse width for making the PWM control. The detector circuit is connected to monitor Vbemf of the winding in the absence of the electric current and to judge the instant oscillation amplitude of the reciprocator based upon the monitored Vbemf. Thus, the system can eliminate an external sensor, yet assuring the PMW control reliably based upon Vbemf correctly reflecting the actual oscillation of the reciprocator.

摘要翻译： 一种用于由定子和往复运动器组成的线性振荡致动器的改进的自振荡系统。 定子承载周期性地提供电流的绕组，以进行往复运动器的共振振荡。 该系统包括一个自振荡电路，用于基于出现在绕组上的反电动势（Vbemf），通过正反馈方式继续致动器的谐振振荡。 该系统还包括一个PWM控制，用于响应由于施加到往复运动器的增加的负载而减小的振荡幅度来增加电流。 包括检测器电路以监视往复运动器的振荡幅度，并提供相应的检测器输出，响应于此，自振荡电路提供脉冲宽度变化的驱动脉冲用于进行PWM控制。 检测器电路在不存在电流的情况下连接到对绕组的Vbemf进行监测，并且基于所监视的Vbemf来判断往复运动器的瞬时振荡幅度。 因此，该系统可以消除外部传感器，而且基于正确反映往复运动器的实际振荡的Vbemf可靠地确保PMW控制。

公开(公告)号：US6133701A

公开(公告)日：2000-10-17

申请号：US296586

申请日：1999-04-23

申请人： Halit Suha Gokturk ,  Hideaki Abe ,  Satoshi Nakayama ,  Toyokatsu Okamoto

发明人： Halit Suha Gokturk ,  Hideaki Abe ,  Satoshi Nakayama ,  Toyokatsu Okamoto

IPC分类号： H02P25/02 ,  H02K33/02

CPC分类号： H02P25/032

摘要： An actuator driving circuit is provided for a positive feedback amplification, through an amplifier, of a counter electromotive force generated in a stator coil of a linear actuator, for continuating a reciprocating movement of a moving element by self-oscillation of the linear actuator, and for an application of a periodic voltage to the stator coil, while the voltage is made sinusoidal if required, so as to render the driving circuit to be high in the driving efficiency and small in dimensions.

摘要翻译： 提供致动器驱动电路，用于通过放大器正线性致动器的定子线圈中产生的反电动势的正反馈放大，用于通过线性致动器的自振动来连续移动元件的往复运动;以及 用于对定子线圈施加周期性电压，同时如果需要，将电压设为正弦，以使驱动电路的驱动效率高，尺寸小。

公开(公告)号：US5955799A

公开(公告)日：1999-09-21

申请号：US30233

申请日：1998-02-25

申请人： Hidetoshi Amaya ,  Takio Maekawa ,  Toyokatsu Okamoto ,  Yasuo Ibuki

发明人： Hidetoshi Amaya ,  Takio Maekawa ,  Toyokatsu Okamoto ,  Yasuo Ibuki

IPC分类号： H02K33/04 ,  B26B19/28 ,  H02K33/16 ,  H02K33/18 ,  H02P25/02 ,  H02K33/02

CPC分类号： B26B19/282 ,  H02K33/16 ,  H02P25/032 ,  Y10S388/902 ,  Y10S388/937

摘要： A linear vibration motor which includes a vibration system, an electromagnetic driver, a detection system, and a control system. The vibration system includes a driven member or reciprocator which is mounted to a magnetic member for reciprocating movement. The amplitude of the reciprocating movement varies as an inverse function of load on the motor. The electromagnetic driver includes a coil and drives the vibration system by applying an electromagnetic force to the magnetic member, the electromagnetic force being produced by a driving current flowing through the coil. The detection system detects at least one characteristic of the vibration system that is related to a characteristic frequency of the vibration system, and produces a feedback signal indicative of a value of the at least one characteristic. The control system is responsive to the feedback signal, during a primary mode of operation, to controllably vary the driving current flowing through the coil in such a manner as to drive the vibration system in resonance with the characteristic frequency, and determines the existence of a condition that renders the detection system non-functional, and drives the vibration system at a prescribed frequency when it is determined that the condition exists, during a back-up mode of operation.

摘要翻译： 一种线性振动电动机，其包括振动系统，电磁驱动器，检测系统和控制系统。 振动系统包括从动构件或往复运动器，其被安装到用于往复运动的磁性构件。 往复运动的幅度随电机负载的反函数而变化。 电磁驱动器包括线圈并通过向磁性构件施加电磁力来驱动振动系统，电磁力由流过线圈的驱动电流产生。 检测系统检测与振动系统的特征频率相关的振动系统的至少一个特征，并且产生表示至少一个特征值的反馈信号。 控制系统响应反馈信号，在主要操作模式下，以可控地改变流过线圈的驱动电流，以便以特征频率驱动振动系统共振，并且确定存在 使得检测系统不起作用的状态，并且在备用操作模式中确定该条件存在时，以规定的频率驱动振动系统。

公开(公告)号：US5736797A

公开(公告)日：1998-04-07

申请号：US658825

申请日：1996-05-31

申请人： Ryo Motohashi ,  Masao Tanahashi ,  Hidetoshi Amaya ,  Takio Maekawa ,  Toyokatsu Okamoto ,  Yasuo Ibuki ,  Claude Oudet ,  Daniel Prudham

发明人： Ryo Motohashi ,  Masao Tanahashi ,  Hidetoshi Amaya ,  Takio Maekawa ,  Toyokatsu Okamoto ,  Yasuo Ibuki ,  Claude Oudet ,  Daniel Prudham

IPC分类号： H02K33/04 ,  H02K33/06 ,  H02K33/16 ,  H02K33/12

CPC分类号： H02K33/16 ,  H02K33/06

摘要： A linear oscillating motor capable of assuring a consistent and effective feedback control of keeping a constant oscillation amplitude with varying load conditions. The linear oscillating motor comprises an oscillator carrying a permanent magnet, and a stator with an electromagnet. The electromagnet is supplied with an electric power to develop an electromagnetic drive force of moving the oscillator in a linear direction relative to the stator. A spring is provided to apply a restoring force to the oscillator for providing a linear oscillating motion to the oscillator. A photo-sensor monitors the linear motion of the oscillator and outputs a signal to a reverse-point detector which determines right and left reverse points of the oscillator. A controller applies the electric power to the electromagnet at the drive points respectively defined subsequent in time to the reverse points and in a varying amount for keeping a constant oscillation amplitude of the oscillator. The photo-sensor outputs a train of pulses appearing each time the oscillator passes its oscillation center. The reverse-point detector determines the reverse points based upon a time period between the two preceding pulses. Since the photo-sensor can monitor an oscillation cycle of the oscillator without being affected by the magnetic field developed by the electromagnet for driving the oscillator, it provides a reliable basis for accurately determining the reverse points and therefore the drive points. Accordingly, the driving force can be applied at an optimum timing to make the feedback control accurately and reliably.

摘要翻译： 一种线性振荡电动机，其能够确保在变化的负载条件下保持恒定振荡幅度的一致且有效的反馈控制。 线性振荡电动机包括承载永磁体的振荡器和具有电磁体的定子。 向电磁体提供电力以产生使振荡器相对于定子沿线性方向移动的电磁驱动力。 提供弹簧以向振荡器施加恢复力以向振荡器提供线性振荡运动。 光电传感器监测振荡器的线性运动，并将信号输出到确定振荡器的左右反向点的反向点检测器。 控制器将驱动点的电力施加到电磁体上，驱动点分别定义在后向时间到反向点，并且以变化的量保持振荡器的恒定的振荡幅度。 光电传感器每当振荡器通过其振荡中心时输出一串脉冲。 反向点检测器基于两个在前的脉冲之间的时间段来确定反向点。 由于光电传感器可以监视振荡器的振荡周期，而不会受到用于驱动振荡器的电磁铁产生的磁场的影响，因此为准确地确定反向点以及驱动点提供了可靠的依据。 因此，可以在最佳定时施加驱动力，从而准确可靠地进行反馈控制。

公开(公告)号：US06351089B1

公开(公告)日：2002-02-26

申请号：US09599450

申请日：2000-06-22

申请人： Yasuo Ibuki ,  Hidetoshi Amaya ,  Toyokatsu Okamoto

发明人： Yasuo Ibuki ,  Hidetoshi Amaya ,  Toyokatsu Okamoto

IPC分类号： H02K3316

CPC分类号： H02P25/032

摘要： A control system for a linear vibration motor capable of eliminating necessity of a separate sensor of detecting the motion of the motor. The linear vibration motor includes a stator provided with a winding, and a vibrator provided with a permanent magnet. The winding is fed with a drive current to generate a magnetic field which interacts with the permanent magnet to cause the vibrator to reciprocate linearly relative to the stator for producing a vibration. The control system includes a controller which detects an ongoing amplitude, i.e., the motion represented by the displacement, speed, or acceleration of the vibrator and provides ON-periods of feeding the driving current to the winding in a varying amount based upon the ongoing amplitude detected in order to keep a vibration amplitude of the vibrator constant. The controller is characterized to provide OFF-period in which the controller instructs not to feed the drive current and in which the controller detects a voltage developed across the winding and determines the ongoing amplitude based upon the detected voltage. Thus, the winding can be best utilized commonly to drive the motor and to sense the ongoing amplitude or motion of the vibrator, thereby eliminating an additional sensor for detection of the motion of the vibrator.

摘要翻译： 一种用于线性振动电动机的控制系统，其能够消除检测电动机运动的单独传感器的必要性。 线性振动电动机包括具有绕组的定子和设置有永磁体的振动器。 绕组被馈送有驱动电流以产生与永磁体相互作用的磁场，以使振动器相对于定子线性地往复运动以产生振动。 该控制系统包括一个控制器，该控制器检测正在进行的振幅，即由振动器的位移，速度或加速度表示的运动，并提供基于持续幅度以不同的量将驱动电流馈送到绕组的接通周期 以便保持振动器的振动幅度恒定。 控制器的特征在于提供关断周期，其中控制器指示不馈送驱动电流，并且其中控制器检测跨绕组上产生的电压，并且基于检测到的电压确定正在进行的振幅。 因此，绕组可以最好地用于驱动电动机并感测振动器的持续振幅或运动，从而消除用于检测振动器的运动的附加传感器。

公开(公告)号：US5034871A

公开(公告)日：1991-07-23

申请号：US498644

申请日：1990-03-26

申请人： Toyokatsu Okamoto ,  Sumio Wada

发明人： Toyokatsu Okamoto ,  Sumio Wada

IPC分类号： H02J7/10 ,  H02J7/00 ,  H02J7/02

CPC分类号： H02J7/008 ,  H02J7/022

摘要： A constant dc current supplying circuit comprises a dc voltage supply, an inverter providing an ac voltage from said dc voltage, and an ac-to-dc converter providing a dc current from the inverter output and supplying the resulting dc current to a load. The inverter includes a switching element driven to turn on and off in order to repetitively interrupt the dc voltage for producing the dc current of which level is determined by on-off time ratio of the switching element. A comparator is included to compare a level of the dc current supplied to the load with a predetermined reference level so as to provide a first output and a second output when the dc current level is below and above the reference level. Also included in the circuit is a feedback controller which generates first and second feedback control signals, respectively in response to the first and second outputs from the comparator. The first and second control signals are defined as a train of pulses of varying duty ratio in order to increase and decrease on-off time ratio of the switching element depending upon the sensed output dc current level, whereby controlling to gradually increase and decrease the output dc current towards the reference level for maintaining the dc current thereat.

公开(公告)号：US06441571B1

公开(公告)日：2002-08-27

申请号：US09695326

申请日：2000-10-25

申请人： Yasuo Ibuki ,  Hidetoshi Amaya ,  Toyokatsu Okamoto

发明人： Yasuo Ibuki ,  Hidetoshi Amaya ,  Toyokatsu Okamoto

IPC分类号： H02K3302

CPC分类号： H02P25/032

摘要： Vibrating linear actuator and method of operating same. The actuator of the invention includes a stator, a spring vibration system having a moving portion with a magnet and further having a spring configured to support the moving portion. The actuator further includes an electromagnetic coil configured to receive an electrical current, whereupon the coil moves the moving portion against a load supplied by the spring to reciprocally move the moving portion, a frequency detector configured to detect a natural frequency of the spring vibration system, and a frequency controller configured to determine a frequency of an electrical current pulse, the pulse to be received by the coil, in accordance with a detection result of the detector.

摘要翻译： 振动线性致动器及其运行方法。 本发明的致动器包括定子，弹簧振动系统，其具有带磁体的移动部分，并且还具有构造成支撑移动部分的弹簧。 所述致动器还包括被配置为接收电流的电磁线圈，于是所述线圈使所述移动部分抵抗由所述弹簧提供的负载移动以使所述移动部分往复移动;频率检测器，被配置为检测所述弹簧振动系统的固有频率， 以及频率控制器，其被配置为根据检测器的检测结果确定电流脉冲的频率，所述脉冲将被线圈接收。

公开(公告)号：US06181090B2

公开(公告)日：2001-01-30

申请号：US09361974

申请日：1999-07-28

申请人： Hidetoshi Amaya ,  Yasuo Ibuki ,  Toyokatsu Okamoto

发明人： Hidetoshi Amaya ,  Yasuo Ibuki ,  Toyokatsu Okamoto

IPC分类号： H02K3316

CPC分类号： H02K33/16 ,  H02P25/032

摘要： A method for driving a linear oscillating motor and a linear oscillating motor are provided. The motor includes a fixed magnetic member, a movable member having a magnet and being supported to oscillate relative to the fixed magnetic member, a detector that detects displacement of the movable member, and a control that oscillates the movable member by sending drive current to a coil of the fixed magnetic member. The method includes controlling, during a first half-period that occurs within a full amplitude period of the movable member, the drive current based upon the output of the detector. The method also includes controlling, during a second half-period that occurs within a fill amplitude period of the movable member, the drive current based upon a fixed drive current waveform.

摘要翻译： 提供一种用于驱动线性振荡电动机和线性振荡电动机的方法。 电动机包括固定磁性部件，具有磁体并被支撑以相对于固定磁性部件振荡的可动部件，检测可移动部件的位移的检测器，以及通过发送驱动电流使可动部件振荡的控制装置 固定磁性部件的线圈。 该方法包括在基于检测器的输出的情况下控制在可移动部件的整个振幅周期内发生的第一半周期期间的驱动电流。 该方法还包括在可移动部件的填充幅度周期内发生的第二半周期期间控制基于固定的驱动电流波形的驱动电流。