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1. 发明授权

US06519408B2 Playback control apparatus for controlling a playback unit and a receiver unit 失效
标题翻译：用于控制回放单元和接收器单元的回放控制装置
公开(公告)号：US06519408B2
公开(公告)日：2003-02-11
申请号：US08900737
申请日：1997-07-25
申请人： Koichiro Nagata , Takaaki Hoshi , Masashi Imai
发明人： Koichiro Nagata , Takaaki Hoshi , Masashi Imai
IPC分类号： H04N576
CPC分类号： H04N21/488 , H04N5/44513 , H04N5/68 , H04N5/775 , H04N21/4104
摘要： In a display device used together with a playback apparatus such as an optical disk, a control is provided responding to a playback signal from an playback apparatus in order to prevent burn-out of CRT phosphor or deterioration of phosphor. A first controller controls the playback apparatus, and a second controller controls the display device, and those two controllers communicate with each other, thereby recognizing an operation status and a display status. Thus those two controllers control circuits and apparatus including a video control circuit which controls a contrast, whereby optimizing a display on a screen, and control status of an audio output, a power supply controller, and a playback apparatus controller.
摘要翻译：在与诸如光盘的重放装置一起使用的显示装置中，响应于来自重放装置的重放信号提供控制，以防止CRT荧光体的烧坏或荧光体的劣化。第一控制器控制播放装置，第二控制器控制显示装置，并且这两个控制器相互通信，从而识别操作状态和显示状态。因此，这两个控制器控制电路和装置，包括控制对比度的视频控制电路，从而优化屏幕上的显示，以及控制音频输出的状态，电源控制器和重放设备控制器。

2. 发明授权

US08710781B2 Power conversion device and method for controlling thereof 有权
标题翻译：电力转换装置及其控制方法
公开(公告)号：US08710781B2
公开(公告)日：2014-04-29
申请号：US13147807
申请日：2010-02-17
申请人： Yoichiro Arakawa , Koichiro Nagata , Yuusuke Arao , Shigehisa Aoyagi
发明人： Yoichiro Arakawa , Koichiro Nagata , Yuusuke Arao , Shigehisa Aoyagi
IPC分类号： H02P6/00
CPC分类号： H02M7/53871 , H02M1/12 , H02M1/15 , H02M7/5395 , H02M2001/0009
摘要： In a power conversion device that includes a PWM converting means for generating a PWM pulse by comparing three-phase voltage commands with a triangular wave carrier signal, a power converter for converting between a DC voltage and a three-phase AC voltage by driving a switching element according to the PWM pulse, a current detecting means for detecting a pulsed current flowing through a DC bus conductor of a main circuit, and a voltage command correcting means for correcting three-phase voltage commands, which corrects the three-phase voltage commands so that a line voltage value between the maximum phase and an intermediate phase and a line voltage value between the intermediate phase and the minimum phase are each equal to or larger than a predetermined value, the maximum phase, intermediate phase, and minimum phase being determined in correspondence to momentary values of the three-phase voltage commands arranged in descending order, if the voltage command is outside an allowable upper limit or lower limit, not only the voltage command for the maximum phase and/or the minimum phase but also the voltage command for the intermediate phase are corrected.Accordingly, the inability to detect a current due to a restriction imposed by an upper limit or a lower limit for an output voltage is eliminated, and highly precise control of the power conversion device is achieved independently of the situation.
摘要翻译：一种电力转换装置，其特征在于，包括：PWM转换装置，用于通过将三相电压指令与三角波载波信号进行比较来产生PWM脉冲;功率转换器，用于通过驱动开关转换直流电压和三相交流电压元件，用于检测流过主电路的直流母线导体的脉冲电流的电流检测装置，以及用于校正三相电压指令的三相电压指令的电压指令校正装置，其校正三相电压指令最大相和中间相之间的线电压值和中间相和最小相之间的线电压值均等于或大于预定值，最大相位，中间相位和最小相位在对应于以降序排列的三相电压命令的瞬时值，如果电压指令在允许的u之外 pper极限或下限，不仅对最大相位和/或最小相位的电压指令以及中间相位的电压指令进行校正。因此，消除了由于对输出电压的上限或下限引起的限制而不能检测电流，并且独立于这种情况实现了电力转换装置的高精度控制。

3. 发明授权

US07902790B2 Induction motor drive unit, motor drive system, and elevating system 有权
标题翻译：感应电机驱动单元，电机驱动系统和升降系统
公开(公告)号：US07902790B2
公开(公告)日：2011-03-08
申请号：US12142002
申请日：2008-06-19
申请人： Yoichiro Arakawa , Koichiro Nagata , Hiroyuki Tomita
发明人： Yoichiro Arakawa , Koichiro Nagata , Hiroyuki Tomita
IPC分类号： H02P21/14
CPC分类号： H02P21/08 , H02P23/08
摘要： A slip frequency is estimated from a current instruction or detected currents in an induction motor. Acceleration impossibility in an induction motor drive unit is determined, when the slip frequency exceeds the maximum torque generating slip frequency for the predetermined interval or the time integrating result exceeds a predetermined value; when the q-axis magnetic flux exceeds the maximum torque generating q-axis magnetic flux or exceeds for a predetermined interval; when the estimated rotational speed is under a predetermined value; when the rotational speed variation rate is negative; and when the rotational speed instruction value or the estimated rotational speed is equal to or smaller than a predetermined value. An induction motor drive system and an elevating system including the induction motor drive unit are also disclosed.
摘要翻译：根据电流指令或感应电动机中检测到的电流估计转差频率。当滑差频率超过预定间隔的最大扭矩产生滑移频率或时间积分结果超过预定值时，确定感应电机驱动单元中的加速不可能性; 当q轴磁通超过产生q轴磁通的最大转矩或超过预定间隔时; 当所述估计转速低于预定值时; 当转速变化率为负时; 并且当转速指令值或估计旋转速度等于或小于预定值时。还公开了一种感应电动机驱动系统和包括感应电动机驱动单元的升降系统。

4. 发明申请

US20070210741A1 DRIVER FOR INDUCTION MOTOR AND METHOD OF DRIVING THE SAME 有权
标题翻译：用于感应电机的驱动器及其驱动方法
公开(公告)号：US20070210741A1
公开(公告)日：2007-09-13
申请号：US11626941
申请日：2007-01-25
申请人： Koichiro Nagata , Toshiaki Okuyama , Kouki Yamamoto , Hiroyuki Tomita
发明人： Koichiro Nagata , Toshiaki Okuyama , Kouki Yamamoto , Hiroyuki Tomita
IPC分类号： H02P27/04
CPC分类号： H02P21/09 , H02P23/20 , H02P29/032
摘要： An object of the present invention is to provide a driver for an induction motor which performs an operation at an acceleration suitable for the magnitude of a load and is excellent in efficiency, without an acceleration failure.The driver for an induction motor includes a slip frequency estimate value arithmetic operation section 15 for arithmetically operating a slip frequency ωŝ of an induction motor 12, and a maximum torque generation slip arithmetic operation section 16 for arithmetically operating a slip frequency ωsmax at which a maximum torque is generated. When the slip frequency ωŝ exceeds a predetermined value ωsmaxTH(=0.96ωsmax, etc.) corresponding to the slip frequency ωsmax at which the maximum torque is generated, a speed change rate arithmetic operation section 17 and a speed change rate correcting section 18 reduce a rate of increase in a speed command ωr*.In addition, when the slip frequency approaches the maximum torque generation slip frequency too closely, the load concerned is judged to be overloaded, and an alarm is generated.
摘要翻译：本发明的目的是提供一种用于感应电动机的驱动器，其以适合于负载大小的加速度进行操作，并且效率优异，而没有加速失效。用于感应电动机的驱动器包括用于算术地操作感应电动机12的转差频率ω的滑差频率估计值算术运算部分15和用于对运算频率ωmax进行运算的最大转矩产生滑差算术运算部分16，产生扭矩。当滑差频率ωi超过与产生最大转矩的转差频率ωmax最大相对应的预定值ωmaxmax（=0.96ωmaxmax等）时，变速率算术运算部分17和变速率校正部分18减少速度指令omega *的增加速度。此外，当滑差频率接近最大转矩产生滑差频率时，判断为负载过大，产生报警。

5. 发明申请

US20080088291A1 ELECTRIC POWER CONVERTER APPARATUS 有权
标题翻译：电力转换器装置
公开(公告)号：US20080088291A1
公开(公告)日：2008-04-17
申请号：US11842988
申请日：2007-08-22
申请人： Koichiro Nagata , Toshiaki Okuyama , Shigetoshi Okamatsu , Koichi Miyazaki
发明人： Koichiro Nagata , Toshiaki Okuyama , Shigetoshi Okamatsu , Koichi Miyazaki
IPC分类号： G05F1/40
CPC分类号： H02P21/0003
摘要： An electric power converter apparatus having a function of converting a power source voltage into an AC voltage having an arbitrary frequency and maintaining an output voltage constant even on the power source variation, in which the electric power converter apparatus decreases the output voltage when the output voltage drops to equal to or less than a predetermined value, afterward, increases the output voltage in response to a predetermined rate of change when the power source voltage rises.
摘要翻译：一种具有将电源电压转换成具有任意频率的交流电压并且即使在电力变化时也保持输出电压恒定的功能的电力转换装置，其中电力变换装置在输出电压下降到等于或小于预定值，然后当电源电压上升时响应于预定变化率增加输出电压。

6. 发明授权

US07332888B2 Driving apparatus for a motor 有权
标题翻译：电机驱动装置
公开(公告)号：US07332888B2
公开(公告)日：2008-02-19
申请号：US11359405
申请日：2006-02-23
申请人： Koichiro Nagata , Toshiaki Okuyama , Haruo Nemoto , Toshio Katayama
发明人： Koichiro Nagata , Toshiaki Okuyama , Haruo Nemoto , Toshio Katayama
IPC分类号： H02P27/04
CPC分类号： H02P21/09
摘要： A motor driving apparatus includes: a current instruction calculator, for calculating a current instruction value based on a deviation between a speed instruction value and an estimated speed value; a current controller, for controlling an output current based on the current instruction value; a frequency instruction calculator, for calculating a frequency instruction value based on an output voltage instruction value or an output voltage detection value, wherein, when an induction motor is to be activated, the current instruction value and the frequency instruction value are calculated directly using the speed instruction value, and an output current and an output frequency are controlled in accordance with the current instruction value and the frequency instruction value.
摘要翻译：电动机驱动装置包括：当前指令计算器，用于基于速度指令值和估计速度值之间的偏差来计算当前指令值; 电流控制器，用于基于当前指令值来控制输出电流; 频率指令计算器，用于基于输出电压指令值或输出电压检测值计算频率指令值，其中当感应电动机被激活时，直接使用所述电流指令值和频率指令值来计算当前指令值和频率指令值速度指令值，输出电流和输出频率根据当前指令值和频率指令值进行控制。

7. 发明授权

US07671558B2 Induction motor controller 有权
标题翻译：感应电动机控制器
公开(公告)号：US07671558B2
公开(公告)日：2010-03-02
申请号：US11843686
申请日：2007-08-23
申请人： Kouki Yamamoto , Toshiaki Okuyama , Hiroyuki Tomita , Yoshitaka Iwaji , Koichiro Nagata
发明人： Kouki Yamamoto , Toshiaki Okuyama , Hiroyuki Tomita , Yoshitaka Iwaji , Koichiro Nagata
IPC分类号： H02P27/04
CPC分类号： H02P21/09 , H02P21/16 , H02P2207/01
摘要： The present invention provides an induction motor controller which includes: a circuit for generating a d-axis current reference signal from a d-axis current command value and a periodically varying periodic signal; a d-axis current controller for controlling a d-axis motor current flowing through an induction motor to be controlled to match the d-axis current reference signal; parameter determining means for calculating and determining a motor parameter of the induction motor based on a deviation of the d-axis motor current from the d-axis current reference signal, and controlling a voltage applied to the induction motor using a compensation voltage calculated from the calculated and determined motor parameter, in which a control parameter for controlling the induction motor is set based on the calculated and determined motor parameter.
摘要翻译：本发明提供一种感应电动机控制器，其包括：用于根据d轴电流指令值和周期性变化的周期信号产生d轴电流参考信号的电路; d轴电流控制器，用于控制流过感应电动机的d轴电动机电流以被控制以匹配d轴电流参考信号; 参数确定装置，用于基于d轴电动机电流与d轴电流参考信号的偏差来计算和确定感应电动机的电动机参数，并且使用从所述d轴电流参考信号计算的补偿电压来控制施加到感应电动机的电压计算和确定的电动机参数，其中基于所计算和确定的电动机参数来设定用于控制感应电动机的控制参数。

8. 发明申请

US20060192521A1 Driving apparatus for a motor 有权
标题翻译：电机驱动装置
公开(公告)号：US20060192521A1
公开(公告)日：2006-08-31
申请号：US11359405
申请日：2006-02-23
申请人： Koichiro Nagata , Toshiaki Okuyama , Haruo Nemoto , Toshio Katayama
发明人： Koichiro Nagata , Toshiaki Okuyama , Haruo Nemoto , Toshio Katayama
IPC分类号： H02P27/04
CPC分类号： H02P21/09
摘要： A motor driving apparatus includes: a current instruction calculator, for calculating a current instruction value based on a deviation between a speed instruction value and an estimated speed value; a current controller, for controlling an output current based on the current instruction value; a frequency instruction calculator, for calculating a frequency instruction value based on an output voltage instruction value or an output voltage detection value, wherein, when an induction motor is to be activated, the current instruction value and the frequency instruction value are calculated directly using the speed instruction value, and an output current and an output frequency are controlled in accordance with the current instruction value and the frequency instruction value.
摘要翻译：电动机驱动装置包括：当前指令计算器，用于基于速度指令值和估计速度值之间的偏差来计算当前指令值; 电流控制器，用于基于当前指令值来控制输出电流; 频率指令计算器，用于基于输出电压指令值或输出电压检测值计算频率指令值，其中当感应电动机被激活时，直接使用所述电流指令值和频率指令值来计算当前指令值和频率指令值速度指令值，输出电流和输出频率根据当前指令值和频率指令值进行控制。

9. 发明授权

US06646896B2 Controller of AC machine 失效
公开(公告)号：US06646896B2
公开(公告)日：2003-11-11
申请号：US10098055
申请日：2002-03-15
申请人： Yoshitoshi Akita , Toshiaki Okuyama , Koichiro Nagata , Shigetoshi Okamatsu
发明人： Yoshitoshi Akita , Toshiaki Okuyama , Koichiro Nagata , Shigetoshi Okamatsu
IPC分类号： H02M545
CPC分类号： H02M5/458 , H02M1/36 , H02M2001/322 , H02P23/26
摘要： For use in a system in which a capacitor is connected between an AC machine and an inverter in order to improve the power factor, a controller for an AC machine capable of even when the overvoltage occurs due to the self-excitation between the AC machine and the capacitor, reactivating stably the inverter to continue the running. When the operation of the inverter is stopped and then the inverter is reactivated, the manipulation of starting the switching of the inverter is performed after a DC voltage of the inverter has been decreased to the operating voltage in the running, whereby the reactivation is performed stably without stopping the system.

10. 发明授权

US6028943A Audio amplifier system using a class D amplifier 有权
标题翻译：音频放大器系统使用D类放大器
公开(公告)号：US6028943A
公开(公告)日：2000-02-22
申请号：US300256
申请日：1999-04-27
申请人： Koichiro Nagata
发明人： Koichiro Nagata
IPC分类号： H03F3/217 , H04R3/12 , H04R3/00
CPC分类号： H03F3/217 , H03F3/68 , H04R3/12
摘要： Class D amplifiers are difficult to incorporate into audio amplifier systems because of the interference created by the amplifier and/or the surrounding circuits. The modulation frequencies f1 and f2 of two class D amplifiers in an audio amplifier system are adjusted so that the frequency f1-f2 of interference between the modulation frequencies is outside the reproducible frequency band B1 of speakers converting the class D amplifier output to audible sound. As a result, interference that may result from simultaneous use of two class D amplifiers for similar purposes is inaudible and not perceived as noise.
摘要翻译：由于放大器和/或周围电路产生的干扰，D类放大器难以并入音频放大器系统。调整音频放大器系统中的两个D类放大器的调制频率f1和f2，使得调制频率之间的干扰频率f1-f2在将D类放大器输出转换为可听见的声音的扬声器的可再现频带B1之外。结果，同时使用两个D类放大器可能产生的类似用途的干扰是听不见的，不被认为是噪声。

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