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1. 发明申请

US20080100243A1 DRIVE CONTROL DEVICE OF MOTOR AND A METHOD OF START-UP 失效
标题翻译：电机的驱动控制装置和启动方法
公开(公告)号：US20080100243A1
公开(公告)日：2008-05-01
申请号：US11871343
申请日：2007-10-12
申请人： Minoru KUROSAWA , Yasuhiko KOKAMI
发明人： Minoru KUROSAWA , Yasuhiko KOKAMI
IPC分类号： H02P1/18
CPC分类号： H02P6/182 , G11B19/2054 , H02P6/20
摘要： A motor drive control device and motor startup method prevent startup noise and reduce startup time. At startup, a current to which a rotor does not react is passed through two phase coils of a polyphase DC motor in succession, and a voltage polarity induced in a non-conducting phase is detected. A first operation decodes the detected signal, and determines phase coils of the motor through which a current should pass to rotate the rotor and the energization direction. A second operation forms a control signal for passing a current according to the determination to drive the motor, detects a voltage peak induced in the non-conducting phase during the drive, and performs switching control of a conducting phase. In normal operation, the position of the rotor is detected based on a back EMF in each phase, and rotation control is performed.
摘要翻译：电机驱动控制装置和电机启动方式可以防止启动噪音，减少启动时间。在启动时，转子不反应的电流依次通过多相直流电动机的两相线圈，并且检测在非导通相中感应的电压极性。第一操作对检测到的信号进行解码，并且确定电流通过的电动机的相线圈以使转子和通电方向旋转。第二操作形成用于根据用于驱动电动机的确定来传递电流的控制信号，检测在驱动期间在非导通相中感应的电压峰值，并执行导通相位的切换控制。在正常运行中，基于各相的反电动势来检测转子的位置，进行旋转控制。

2. 发明申请

US20080061726A1 Control device for synchronous motor 有权
标题翻译：同步电机控制装置
公开(公告)号：US20080061726A1
公开(公告)日：2008-03-13
申请号：US11895406
申请日：2007-08-23
申请人： Yoshitaka Iwaji , Yasuhiko Kokami , Minoru Kurosawa , Junnosuke Nakatsugawa
发明人： Yoshitaka Iwaji , Yasuhiko Kokami , Minoru Kurosawa , Junnosuke Nakatsugawa
IPC分类号： H02P6/08
CPC分类号： H02P6/10 , H02P21/05
摘要： A control technology for a synchronous motor for suppressing rotational pulsation caused by variation in individuals without making a control algorithm complex is provided. In a motor drive system which is a control device for a synchronous motor, in order to suppress the pulsation component of N times as high as the AC frequency for driving the synchronous motor, a controller in which the phase property of the disturbance response of the controller with respect to the pulsation frequency is within ±45° is arranged. Therefore, the torque pulsation component generated from distortion in induction voltage or variation between phases is suppressed.
摘要翻译：提供了一种用于抑制由个体变化引起的旋转脉动的同步电机的控制技术，而不使控制算法复杂化。在作为同步电动机的控制装置的电动机驱动系统中，为了抑制用于驱动同步电动机的交流频率的N倍的脉动分量，控制器将其中的干扰响应的相位特性相对于脉动频率的控制器设置在±45°以内。因此，抑制了感应电压的变形或相位的变化而产生的转矩脉动成分。

3. 发明授权

US07280308B2 Motor drive semiconductor integrated circuit and magnetic disk storage apparatus 有权
标题翻译：电机驱动半导体集成电路和磁盘存储装置
公开(公告)号：US07280308B2
公开(公告)日：2007-10-09
申请号：US11098644
申请日：2005-04-05
申请人： Yasuhiko Kokami
发明人： Yasuhiko Kokami
IPC分类号： G11B5/596
CPC分类号： G11B33/121 , G05B11/28 , G11B5/5547 , G11B25/043
摘要： The Invention provides a motor drive semiconductor integrated circuit for driving and controlling a voice coil motor that can conduct a seek operation, a track follow operation and a settling operation through PWM control, has desired control accuracy and can be produced by a CMOS process. In a voice coil motor drive circuit (200) for executing positioning control of a magnetic head by feedback-controlling a driving current of a voice coil motor (108) for moving a magnetic head (106) over a magnetic disk for reading information from a storage track on the magnetic disk driven for rotation while a read state of the magnetic head is being monitored, head movement control such as a seek operation, a track follow operation etc, of the magnetic head is executed by PWM driving on the basis of a command value from a controller.
摘要翻译：本发明提供了一种用于驱动和控制音圈电动机的电机驱动半导体集成电路，其可以通过PWM控制进行寻道操作，轨道跟随操作和稳定操作，具有期望的控制精度并且可以通过CMOS工艺产生。在用于通过反馈控制音圈电动机（108）的驱动电流来执行磁头的定位控制的音圈电动机驱动电路（200）中，用于使磁头（106）移动到磁盘上，用于从在磁头的读取状态被监视的同时驱动磁盘上的磁盘上的存储轨道，通过PWM驱动来执行磁头的诸如寻道操作，磁道跟随操作等的磁头移动控制，基于来自控制器的命令值。

4. 发明申请

US20070195451A1 Motor drive semiconductor integrated circuit and magnetic disk storage apparatus 审中-公开
标题翻译：电机驱动半导体集成电路和磁盘存储装置
公开(公告)号：US20070195451A1
公开(公告)日：2007-08-23
申请号：US11790520
申请日：2007-04-26
申请人： Yasuhiko Kokami
发明人： Yasuhiko Kokami
IPC分类号： G11B5/596
CPC分类号： G11B33/121 , G05B11/28 , G11B5/5547 , G11B25/043
摘要： The invention provides a motor drive semiconductor integrated circuit for driving and controlling a voice coil motor that can conduct a seek operation, a track follow operation and a settling operation through PWM control, has desired control accuracy and can be produced by a CMOS process. In a voice coil motor drive circuit for executing positioning control of a magnetic head by feedback-controlling a driving current of a voice coil motor for moving a magnetic head over a magnetic disk for reading information from a storage track on the magnetic disk driven for rotation while a read state of the magnetic head is being monitored, head movement control such as a seek operation, a track follow operation etc, of the magnetic head is executed by PWM driving on the basis of a command value from a controller.
摘要翻译：本发明提供了一种用于驱动和控制音圈电动机的电动机驱动半导体集成电路，其可以通过PWM控制进行寻道操作，跟踪跟踪操作和稳定操作，具有期望的控制精度并且可以通过CMOS工艺产生。在用于通过反馈控制音圈电动机的驱动电流的音圈电动机驱动电路中，用于使磁头在磁盘上移动，用于从驱动旋转的磁盘上的存储轨道读取信息在监视磁头的读取状态的同时，通过基于来自控制器的命令值的PWM驱动来执行磁头的诸如寻道操作，磁道跟随操作等的磁头移动控制。

5. 发明授权

US06903894B2 Magnetic disc storage apparatus 失效
标题翻译：磁盘存储装置
公开(公告)号：US06903894B2
公开(公告)日：2005-06-07
申请号：US10012401
申请日：2001-12-12
申请人： Yasuhiko Kokami , Kenji Nishimura , Tatsuya Negishi
发明人： Yasuhiko Kokami , Kenji Nishimura , Tatsuya Negishi
IPC分类号： G11B21/08 , G11B5/012 , G11B5/55 , G11B5/596 , G11B21/10 , G11B23/00 , H02P25/06
CPC分类号： G11B5/5547 , G11B5/012 , G11B23/0007
摘要： A magnetic disc storage apparatus including a magnetic head for reading information from a storage track on a magnetic storage disc driven to spin, a voice coil motor for moving the magnetic head above the disc, and a magnetic head drive system for executing a position control of the magnetic head by controlling driving current of the voice coil motor by a feedback control while monitoring a state of reading the magnetic head in which the magnetic head drive system includes multi-mode driving means for executing a linear drive mode for controlling, as an analog amount, the driving current of the voice coil motor when an amount of driving to move the magnetic head is small and executing a pulse drive mode for controlling, as a digital amount, the driving current of the voice coil motor when the amount of driving to move the magnetic head is large.By the invention, both of high accuracy formation of position control of the magnetic head in tracking and high speed formation of access by shortening seek time are enabled while effectively reducing heating or EMI inducing read/write error.
摘要翻译：一种磁盘存储装置，包括用于从驱动旋转的磁盘上的存储轨道读取信息的磁头，用于使磁头移动到盘上方的音圈电机，以及用于执行位置控制的磁头驱动系统通过控制音圈电动机的驱动电流，同时监视读取磁头的状态，其中磁头驱动系统包括多模驱动装置，用于执行用于控制的线性驱动模式，作为模拟当驱动磁头的驱动量小时，音圈电动机的驱动电流很小，并且执行脉冲驱动模式，用于当驾驶到驾驶员的数量为数字量时控制音圈电动机的驱动电流移动磁头大。通过本发明，可以实现高精度地形成磁头在跟踪中的位置控制和通过缩短查找时间的高速形成访问，同时有效地减少加热或EMI引起的读/写错误。

6. 发明申请

US20050036228A1 Magnetic disk storage apparatus 审中-公开
标题翻译：磁盘存储装置
公开(公告)号：US20050036228A1
公开(公告)日：2005-02-17
申请号：US10948220
申请日：2004-09-24
申请人： Reiichi Kimura , Yasuhiko Kokami , Kunihiro Kawauchi , Minoru Kurosawa , Kichiya Itagaki
发明人： Reiichi Kimura , Yasuhiko Kokami , Kunihiro Kawauchi , Minoru Kurosawa , Kichiya Itagaki
IPC分类号： G11B19/28 , G11B19/20 , G11B19/247 , H02P6/00 , H02P6/08 , H02P6/18 , G11B15/46
CPC分类号： G11B19/20 , G11B19/247 , H02P6/08 , H02P6/28
摘要： Currents of sine waveforms can be fed through coils by a relatively small-sized circuit, and thereby, highly dense magnetic storage can be realized with less rotation variations and a driving control circuit of a motor rotating at a low noise level can be provided. A coil of one phase of a three-phase brushless motor is driven with full amplitude at which an applied voltage becomes equal to a source voltage, and a coil of one of other phases is driven with gradually changing voltages so that a current of sine waveform is delivered, and a coil of the remaining phase is driven by feedback control so that a total current flowing through all coils becomes a predetermined current value.
摘要翻译：正弦波形的电流可以通过相对较小尺寸的电路通过线圈馈送，从而可以以较小的旋转变化实现高度密集的磁存储，并且可以提供以低噪声水平旋转的电动机的驱动控制电路。三相无刷电动机的一相线圈以全幅度驱动，施加的电压等于源电压，并且其中一相的线圈以逐渐变化的电压驱动，使得正弦波形的电流并且通过反馈控制驱动剩余相的线圈，使得流过所有线圈的总电流成为预定电流值。

7. 发明申请

US20110156625A1 MOTOR DRIVING APPARATUS AND METHOD FOR CONTROL OF MOTOR REVOLUTION 有权
标题翻译：电动机驱动装置和控制电动机的方法
公开(公告)号：US20110156625A1
公开(公告)日：2011-06-30
申请号：US13044042
申请日：2011-03-09
申请人： Minoru KUROSAWA , Yasuhiko KOKAMI
发明人： Minoru KUROSAWA , Yasuhiko KOKAMI
IPC分类号： H02P6/10
CPC分类号： H02P6/10 , G11B19/28 , H02P6/18
摘要： This invention provides a motor driving apparatus that made it possible to reduce torque ripples including those attributed to load variation of the motor and an associated method for control of motor revolution. An output stage to a multiphase DC motor is comprised of power elements to supply output voltages to multiphase coils and a predriver to supply drive voltages to the power elements. A resistor means detects a current flowing through the power elements. A supply current detector detects a voltage signal produced across the resistor means as a supply current, using a high-speed ADC and a moving average filter. An output controller generates a PWM signal with a frequency lower than the frequency of the high-speed ADC so that the current detected by the supply current detector conforms to a current signal indicating a motor revolving speed and transfers the PWM signal to the output stage.
摘要翻译：本发明提供一种电动机驱动装置，其能够减少扭矩波动，包括归因于电动机的负载变化的转矩波动，以及用于控制电动机转速的相关方法。向多相直流电动机的输出级由向多相线圈提供输出电压的功率元件和向功率元件提供驱动电压的预驱动器组成。电阻装置检测流过功率元件的电流。电源电流检测器使用高速ADC和移动平均滤波器来检测跨电阻器件产生的电压信号作为电源电流。输出控制器产生频率低于高速ADC频率的PWM信号，使得由电源电流检测器检测到的电流符合指示电动机转速的电流信号，并将PWM信号传输到输出级。

8. 发明申请

US20110074324A1 Control Device for Synchronous Motor 失效
标题翻译：同步电机控制装置
公开(公告)号：US20110074324A1
公开(公告)日：2011-03-31
申请号：US12963392
申请日：2010-12-08
申请人： Yoshitaka Iwaji , Yasuhiko Kokami , Minoru Kurosawa , Junnosuke Nakatsugawa
发明人： Yoshitaka Iwaji , Yasuhiko Kokami , Minoru Kurosawa , Junnosuke Nakatsugawa
IPC分类号： H02P6/10
CPC分类号： H02P6/10 , H02P21/05
摘要： A control technology for a synchronous motor for suppressing rotational pulsation caused by variation in individuals without making a control algorithm complex is provided. In a motor drive system which is a control device for a synchronous motor, in order to suppress the pulsation component of N times as high as the AC frequency for driving the synchronous motor, a controller in which the phase property of the disturbance response of the controller with respect to the pulsation frequency is within ±45° is arranged. Therefore, the torque pulsation component generated from distortion in induction voltage or variation between phases is suppressed.
摘要翻译：提供了一种用于抑制由个体变化引起的旋转脉动的同步电机的控制技术，而不使控制算法复杂化。在作为同步电动机的控制装置的电动机驱动系统中，为了抑制用于驱动同步电动机的交流频率的N倍的脉动分量，控制器将其中的干扰响应的相位特性相对于脉动频率的控制器设置在±45°以内。因此，抑制了感应电压的变形或相位的变化而产生的转矩脉动成分。

9. 发明申请

US20100177444A1 VCM DRIVER AND PWM AMPLIFIER 失效
标题翻译： VCM驱动器和PWM放大器
公开(公告)号：US20100177444A1
公开(公告)日：2010-07-15
申请号：US12728449
申请日：2010-03-22
申请人： Yasuhiko Kokami , Hiroshi Kuroiwa
发明人： Yasuhiko Kokami , Hiroshi Kuroiwa
IPC分类号： G11B5/55
CPC分类号： G11B5/5526 , G11B5/5547
摘要： The present invention provides a VCM driver realizing low power consumption and high accuracy and a PWM amplifier compensating a dead time distortion. A phase compensator, a ΔΣ modulator receiving an output signal of the phase compensator and converting the output signal to a control code of predetermined bits, a PWM modulator receiving the control code to produce a PWM signal, and an output circuit receiving the PWM signal to drive a voice coil constitute a forward path. A sense amplifier sensing a current of the voice coil, an ADC receiving an output signal of the sense amplifier, a low-pass filter receiving an output signal of the ADC, and a decimation filter receiving an output signal of the low-pass filter constitute a feedback path. An output signal of the decimation filter is fed back to the input side of the phase compensator to form a major feedback loop having a first-order characteristic loop gain. An output signal of the decimation filter is fed back to the output side of the phase compensator to form a minor feedback loop having a loop gain which is flat until a target band frequency when viewed from the output side of the phase compensator.
摘要翻译：本发明提供了实现低功耗和高精度的VCM驱动器以及补偿死区时间失真的PWM放大器。相位补偿器，＆Dgr;＆Sgr; 调制器接收相位补偿器的输出信号并将输出信号转换成预定位的控制码;接收控制码以产生PWM信号的PWM调制器;接收PWM信号以驱动音圈的输出电路构成一个前进路径感测放大器，感测音圈的电流，接收读出放大器的输出信号的ADC，接收ADC的输出信号的低通滤波器以及接收低通滤波器的输出信号的抽取滤波器构成反馈路径。抽取滤波器的输出信号被反馈到相位补偿器的输入侧以形成具有一阶特性环路增益的主反馈环路。抽取滤波器的输出信号被反馈到相位补偿器的输出侧，以形成从相位补偿器的输出侧观察到直到目标频带频率为止的环路增益的次级反馈环路。

10. 发明申请

US20090212851A1 POWER SUPPLY UNIT 失效
标题翻译：供电单元
公开(公告)号：US20090212851A1
公开(公告)日：2009-08-27
申请号：US12342710
申请日：2008-12-23
申请人： Osamu YAMASHITA , Yasuhiko Kokami , Masahiro Ishihara , Toshiyuki Tsunoda
发明人： Osamu YAMASHITA , Yasuhiko Kokami , Masahiro Ishihara , Toshiyuki Tsunoda
IPC分类号： G05F1/10
CPC分类号： H02M1/32 , H02M3/158 , H02M2001/0009 , H02M2001/0025
摘要： High-accuracy overcurrent detection is performed, while a loss resulting from the current detection is significantly reduced. A switch section outputs the voltage between the both terminals of a current detection resistor using an AND signal between an output signal from a hysteresis comparator and an output signal from a pre-driver. The voltage is filtered by an electrostatic capacitor element and a resistor, and inputted to a comparator. The comparator makes a comparison between the signals inputted to the two input terminals thereof, and outputs the result of the comparison to a digital filter. When an overcurrent begins to flow in a power supply unit, the levels of the voltages inputted to the two input terminals of the comparator are inverted so that the comparator outputs an inversion signal to the digital filter. The digital filter outputs a detection signal to an overcurrent detection circuit when an arbitrary time has elapsed.
摘要翻译：执行高精度过电流检测，而由电流检测导致的损耗显着降低。开关部分使用来自迟滞比较器的输出信号和来自预驱动器的输出信号之间的AND信号来输出电流检测电阻器的两端之间的电压。电压由静电电容器元件和电阻器滤波，并输入到比较器。比较器对输入到其两个输入端的信号进行比较，并将比较结果输出到数字滤波器。当过电流在电源单元中流动时，输入到比较器的两个输入端的电压的电平被反相，使得比较器向数字滤波器输出反相信号。当任意时间过去时，数字滤波器将检测信号输出到过电流检测电路。

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