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1. 发明授权

US07732976B2 Piezoelectric actuator drive device 有权
标题翻译：压电致动器驱动装置
公开(公告)号：US07732976B2
公开(公告)日：2010-06-08
申请号：US12496763
申请日：2009-07-02
申请人： Yasuhiro Fukagawa , Tsutomu Nakamura , Tatsuya Kakehi
发明人： Yasuhiro Fukagawa , Tsutomu Nakamura , Tatsuya Kakehi
IPC分类号： H01L41/09
CPC分类号： F02D41/2096 , F02D2041/2003 , F02D2041/2006 , F02D2041/2058 , H02N2/067
摘要： In a piezoelectric actuator control device for controlling operation of one or more piezoelectric actuators, when receiving a drive signal of a low level, a discharging switch is repeatedly turned on and off in order to discharge electric charge accumulated in the piezoelectric actuator. That is, the discharging switch is kept ON until a discharging current from a piezoelectric actuator reaches a peak threshold value Ip. When the discharging current reaches the peak threshold value Ip, the discharging switch is turned OFF and kept OFF until a discharging current from a piezoelectric actuator reaches a peak threshold value Ip. The device has a threshold value setting circuit for increasing the peak threshold value according to a discharging period of time.
摘要翻译：在用于控制一个或多个压电致动器的操作的压电致动器控制装置中，当接收到低电平的驱动信号时，放电开关被重复地接通和关断，以便放电在压电致动器中累积的电荷。也就是说，放电开关保持ON，直到来自压电致动器的放电电流达到峰值阈值Ip。当放电电流达到峰值阈值Ip时，放电开关截止并保持截止，直到来自压电致动器的放电电流达到峰值阈值Ip。该装置具有用于根据放电时间段增加峰值阈值的阈值设定电路。

2. 发明申请

US20100001618A1 PIEZOELECTRIC ACTUATOR DRIVE DEVICE 有权
标题翻译：压电致动器驱动装置
公开(公告)号：US20100001618A1
公开(公告)日：2010-01-07
申请号：US12496763
申请日：2009-07-02
申请人： Yasuhiro Fukagawa , Tsutomu Nakamura , Tatsuya Kakehi
发明人： Yasuhiro Fukagawa , Tsutomu Nakamura , Tatsuya Kakehi
IPC分类号： H02N2/06
CPC分类号： F02D41/2096 , F02D2041/2003 , F02D2041/2006 , F02D2041/2058 , H02N2/067
摘要： In a piezoelectric actuator control device for controlling operation of one or more piezoelectric actuators, when receiving a drive signal of a low level, a discharging switch is repeatedly turned on and off in order to discharge electric charge accumulated in the piezoelectric actuator. That is, the discharging switch is kept ON until a discharging current from a piezoelectric actuator reaches a peak threshold value Ip. When the discharging current reaches the peak threshold value Ip, the discharging switch is turned OFF and kept OFF until a discharging current from a piezoelectric actuator reaches a peak threshold value Ip. The device has a threshold value setting circuit for increasing the peak threshold value according to a discharging period of time.
摘要翻译：在用于控制一个或多个压电致动器的操作的压电致动器控制装置中，当接收到低电平的驱动信号时，放电开关被重复地接通和关断，以便放电在压电致动器中累积的电荷。也就是说，放电开关保持ON，直到来自压电致动器的放电电流达到峰值阈值Ip。当放电电流达到峰值阈值Ip时，放电开关截止并保持截止，直到来自压电致动器的放电电流达到峰值阈值Ip。该装置具有用于根据放电时间段增加峰值阈值的阈值设定电路。

3. 发明授权

US07474035B2 Driving device for piezoelectric actuator 失效
标题翻译：压电执行机构的驱动装置
公开(公告)号：US07474035B2
公开(公告)日：2009-01-06
申请号：US11808180
申请日：2007-06-07
申请人： Yasuhiro Fukagawa , Tsutomu Nakamura , Takamichi Kamiya , Noboru Nagase , Hideo Naruse
发明人： Yasuhiro Fukagawa , Tsutomu Nakamura , Takamichi Kamiya , Noboru Nagase , Hideo Naruse
IPC分类号： H01L41/09 , H02N2/16
CPC分类号： H02N2/067 , F02D41/2096
摘要： In a driving device for a piezoelectric actuator, when a driving signal is input, a charging switch is repetitively turned on/off to charge and expand the piezoelectric actuator under the state that a discharging switch is turned off. Thereafter, when the input of the driving signal is stopped, the discharging switch is repetitively turned on/off under the state that the charging switch is turned off, thereby discharging and contracting the piezoelectric actuator. Particularly, during the charging period, the charging switch is turned on at a fixed period, and the charging switch is turned off when an integration value of current flowing in a charging circuit at the ON-time of the charging switch reaches a target charge amount.
摘要翻译：在用于压电致动器的驱动装置中，当输入驱动信号时，在放电开关断开的状态下，充电开关重复地导通/截止以对压电致动器充电和膨胀。此后，当驱动信号的输入停止时，在充电开关关闭的状态下，放电开关重复地接通/断开，从而使压电致动器放电和收缩。特别地，在充电期间，充电开关以固定的时间段接通，并且当在充电开关的导通时间中流过充电电路的电流的积分值达到目标充电量时，充电开关截止。

4. 发明申请

US20100033064A1 ROTATION DETECTOR AND DIRECT-CURRENT MOTOR 有权
标题翻译：旋转探测器和直流电动机
公开(公告)号：US20100033064A1
公开(公告)日：2010-02-11
申请号：US12535968
申请日：2009-08-05
申请人： Ken Tanaka , Tsutomu Nakamura , Kenji Takeda , Masaru Touge , Yasuhiro Fukagawa
发明人： Ken Tanaka , Tsutomu Nakamura , Kenji Takeda , Masaru Touge , Yasuhiro Fukagawa
IPC分类号： H02K11/00 , H02K23/00
CPC分类号： H02K23/66 , G01B7/30 , G01D5/2006 , G01P3/48 , H02P6/185 , H02P7/0094 , H02P2203/03
摘要： A power supply unit superimposes alternating-current voltage on direct-current voltage and applies it to a motor. As a result, when the motor is rotated, a current containing an alternating-current component flows. Further, the motor includes a capacitor connected in parallel with one phase coil. Owing to this capacitor, the impedance of the motor circuit between brushes is varied according to the rotation of the motor. Variation in impedance appears as variation in the amplitude of the alternating-current component in motor current. A signal processing unit extracts an alternating-current component from the motor current detected by the current detection unit and generates a rotation pulse corresponding to variation in the amplitude. A rotation angle detection unit detects the rotation angle of the motor based on this rotation pulse.
摘要翻译：电源单元将交流电压叠加在直流电压上并将其施加到电动机。结果，当马达旋转时，流过含有交流分量的电流。此外，电动机包括与一相线圈并联连接的电容器。由于该电容器，电刷之间的电动机电路的阻抗根据电动机的旋转而变化。阻抗的变化表现为电机电流中交流分量振幅的变化。信号处理单元从由电流检测单元检测到的电机电流提取交流分量，并产生与振幅变化对应的旋转脉冲。旋转角度检测单元基于该旋转脉冲检测电动机的旋转角度。

5. 发明申请

US20070296307A1 Driving device for piezoelectric actuator 失效
标题翻译：压电执行机构的驱动装置
公开(公告)号：US20070296307A1
公开(公告)日：2007-12-27
申请号：US11808180
申请日：2007-06-07
申请人： Yasuhiro Fukagawa , Tsutomu Nakamura , Takamichi Kamiya , Noboru Nagase , Hideo Naruse
发明人： Yasuhiro Fukagawa , Tsutomu Nakamura , Takamichi Kamiya , Noboru Nagase , Hideo Naruse
IPC分类号： H01L41/09
CPC分类号： H02N2/067 , F02D41/2096
摘要： In a driving device for a piezoelectric actuator, when a driving signal is input, a charging switch is repetitively turned on/off to charge and expand the piezoelectric actuator under the state that a discharging switch is turned off. Thereafter, when the input of the driving signal is stopped, the discharging switch is repetitively turned on/off under the state that the charging switch is turned off, thereby discharging and contracting the piezoelectric actuator. Particularly, during the charging period, the charging switch is turned on at a fixed period, and the charging switch is turned off when an integration value of current flowing in a charging circuit at the ON-time of the charging switch reaches a target charge amount.
摘要翻译：在用于压电致动器的驱动装置中，当输入驱动信号时，在放电开关断开的状态下，充电开关重复地导通/截止以对压电致动器充电和膨胀。此后，当驱动信号的输入停止时，在充电开关关闭的状态下，放电开关重复地接通/断开，从而使压电致动器放电和收缩。特别地，在充电期间，充电开关以固定的时间段接通，并且当在充电开关的导通时间中流过充电电路的电流的积分值达到目标充电量时，充电开关截止。

6. 发明授权

US08222776B2 Rotation detector and direct-current motor 有权
标题翻译：旋转检测器和直流电机
公开(公告)号：US08222776B2
公开(公告)日：2012-07-17
申请号：US12535968
申请日：2009-08-05
申请人： Ken Tanaka , Tsutomu Nakamura , Kenji Takeda , Masaru Touge , Yasuhiro Fukagawa
发明人： Ken Tanaka , Tsutomu Nakamura , Kenji Takeda , Masaru Touge , Yasuhiro Fukagawa
IPC分类号： H02K11/00
CPC分类号： H02K23/66 , G01B7/30 , G01D5/2006 , G01P3/48 , H02P6/185 , H02P7/0094 , H02P2203/03
摘要： A power supply unit superimposes alternating-current voltage on direct-current voltage and applies it to a motor. As a result, when the motor is rotated, a current containing an alternating-current component flows. Further, the motor includes a capacitor connected in parallel with one phase coil. Owing to this capacitor, the impedance of the motor circuit between brushes is varied according to the rotation of the motor. Variation in impedance appears as variation in the amplitude of the alternating-current component in motor current. A signal processing unit extracts an alternating-current component from the motor current detected by the current detection unit and generates a rotation pulse corresponding to variation in the amplitude. A rotation angle detection unit detects the rotation angle of the motor based on this rotation pulse.
摘要翻译：电源单元将交流电压叠加在直流电压上并将其施加到电动机。结果，当马达旋转时，流过含有交流分量的电流。此外，电动机包括与一相线圈并联连接的电容器。由于该电容器，电刷之间的电动机电路的阻抗根据电动机的旋转而变化。阻抗的变化表现为电机电流中交流分量振幅的变化。信号处理单元从由电流检测单元检测到的电动机电流提取交流分量，并产生与振幅变化相对应的旋转脉冲。旋转角度检测单元基于该旋转脉冲检测电动机的旋转角度。

7. 发明授权

US08754689B2 Switching element driving device and method 有权
标题翻译：开关元件驱动装置及方法
公开(公告)号：US08754689B2
公开(公告)日：2014-06-17
申请号：US13535482
申请日：2012-06-28
申请人： Youichirou Suzuki , Yasuhiro Fukagawa , Takeshi Nakamura
发明人： Youichirou Suzuki , Yasuhiro Fukagawa , Takeshi Nakamura
IPC分类号： H03K5/12
CPC分类号： H03K17/167 , H03K17/164
摘要： A slew rate regulation circuit varies a slew rate of a waveform of a voltage outputted to a DC motor through a N-channel MOSFET. The slew rate regulation circuit lowers a peak level by dispersing frequency components of switching noise, which develops in a frequency range higher than a frequency range determined by a carrier frequency.
摘要翻译：压摆率调节电路通过N沟道MOSFET改变输出到DC电动机的电压的波形的转换速率。转换速率调节电路通过分散在高于由载波频率确定的频率范围的频率范围内产生的开关噪声的频率分量来降低峰值电平。

8. 发明授权

US08531068B2 Rotation sensor and direct current motor 有权
标题翻译：旋转传感器和直流电动机
公开(公告)号：US08531068B2
公开(公告)日：2013-09-10
申请号：US12928641
申请日：2010-12-16
申请人： Ken Tanaka , Yasuhiro Fukagawa , Masaru Touge
发明人： Ken Tanaka , Yasuhiro Fukagawa , Masaru Touge
IPC分类号： H02K11/00
CPC分类号： H02K23/66
摘要： A direct current motor includes an armature coil having at least three phase coils, a commutator having multiple commutator segments connected to the armature coil, a pair of brushes in slidable contact with the commutator to supply power to the phase coils through the commutator, a rotation shaft, and a ring varistor coaxially fixed to the rotation shaft and having a ring-shaped varistor body and multiple electrodes that are circumferentially arranged on a surface of the varistor body. Each commutator segment is connected to a corresponding electrode of the ring varistor. The electrodes of the ring varistor are paired to form electrode pairs. Each electrode pair includes any two of the electrodes. A capacitance of one electrode pair is different from a capacitance of another electrode pair.
摘要翻译：直流电动机包括具有至少三相线圈的电枢线圈，具有连接到电枢线圈的多个换向器段的换向器，与换向器滑动接触的一对电刷，以通过换向器向相线圈供电，轴和环形变阻器同轴地固定在旋转轴上，并且具有环形可变电阻体和周向布置在可变电阻体的表面上的多个电极。每个换向器段连接到环形变阻器的相应电极。环形变阻器的电极配对形成电极对。每个电极对包括任何两个电极。一个电极对的电容与另一个电极对的电容不同。

9. 发明授权

US08525464B2 Rotation detecting apparatus and rotation detecting system 有权
标题翻译：旋转检测装置和旋转检测系统
公开(公告)号：US08525464B2
公开(公告)日：2013-09-03
申请号：US12932410
申请日：2011-02-24
申请人： Ken Tanaka , Yasuhiro Fukagawa , Masaru Touge
发明人： Ken Tanaka , Yasuhiro Fukagawa , Masaru Touge
IPC分类号： H02P3/08 , H02K11/00
CPC分类号： H02K11/001 , G01P3/48 , H02K11/20 , H02P7/0094
摘要： A rotation detecting apparatus for detecting a rotational state of a direct-current motor includes a driving device, a control device, an energization detecting device, an alternating-current component detecting device, and a rotational state detecting device. An impedance between brushes of the motor changes periodically in accordance with rotation of the motor. The alternating-current component detecting device detects change of an alternating-current component of electric current that is supplied to the motor based on an electrical quantity. The change of the alternating-current component is caused by change of the impedance caused in accordance with the rotation. The rotational state detecting device detects at least one of a rotation angle, a rotational direction, and a rotational speed of the motor based on a detection result of the alternating-current component detecting device.
摘要翻译：用于检测直流电动机的旋转状态的旋转检测装置包括驱动装置，控制装置，通电检测装置，交流分量检测装置和旋转状态检测装置。马达的电刷之间的阻抗根据马达的转动而周期性地变化。交流分量检测装置基于电量检测供给到电动机的电流的交流分量的变化。交流分量的变化是由根据旋转引起的阻抗的变化引起的。旋转状态检测装置基于交流分量检测装置的检测结果来检测电动机的旋转角度，旋转方向和转速中的至少一个。

10. 发明授权

US06285136B1 Lighting driver for discharge lamp 失效
标题翻译：放电灯照明驱动器
公开(公告)号：US06285136B1
公开(公告)日：2001-09-04
申请号：US09528195
申请日：2000-03-17
申请人： Akira Fujii , Yasuhiro Fukagawa , Takumi Kataoka
发明人： Akira Fujii , Yasuhiro Fukagawa , Takumi Kataoka
IPC分类号： H05B3702
CPC分类号： H05B41/2881 , H05B41/2822 , H05B41/2883 , H05B41/382
摘要： A lighting driver for a discharge lamp is provided. The discharge lamp is designed to be ignited in response to application of a voltage higher than a given set voltage and to maintain stable emission of light through supply of a given current. The lighting driver includes two voltage source circuits one of which applies a first voltage having a first frequency to a piezoelectric transformer for igniting the discharge lamp and the other applying a second voltage of a second frequency for keeping stable emission of light from the discharge lamp. The lighting driver also includes a frequency switch which switches between communication of the first voltage source circuit with the piezoelectric transformer and communication of the second voltage source circuit with the piezoelectric transformer depending on whether the discharge lamp has been ignited or not, thereby keeping the stable emission of light from the discharge lamp after ignited.
摘要翻译：提供了用于放电灯的照明驱动器。放电灯被设计为响应于施加高于给定设定电压的电压而点燃，并且通过供给给定电流来保持稳定的光发射。照明驱动器包括两个电压源电路，其中一个电压源电路将具有第一频率的第一电压施加到用于点燃放电灯的压电变压器，而另一个施加第二频率的第二电压以保持来自放电灯的稳定发射光。照明驱动器还包括频率开关，其在第一电压源电路与压电变压器的通信之间切换，并且根据放电灯是否被点燃而与第二电压源电路与压电变压器的通信，从而保持稳定点火后放电灯发出光。

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