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11. 发明申请

US20110262112A1 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：US20110262112A1
公开(公告)日：2011-10-27
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： H02P7/29 , H02P3/08 , H02P5/50
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。

12. 发明申请

US20110148258A1 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：US20110148258A1
公开(公告)日：2011-06-23
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。

13. 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。

14. 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。

15. 发明授权

US07034437B2 Piezo actuator drive circuit 有权
标题翻译：压电致动器驱动电路
公开(公告)号：US07034437B2
公开(公告)日：2006-04-25
申请号：US10780697
申请日：2004-02-19
申请人： Yasuhiro Fukagawa , Yasuyuki Sakakibara , Eiji Takemoto
发明人： Yasuhiro Fukagawa , Yasuyuki Sakakibara , Eiji Takemoto
IPC分类号： H01L41/08
CPC分类号： H01L41/042 , F02D41/2096
摘要： A piezo actuator drive circuit comprises a charging path for charging a piezo stack that can be driven by being charged and discharged, an arithmetic circuit for calculating the charging amount for the piezo stack, and a driving control circuit for comparing the calculated charging amount and a target charging amount and correcting the charging amount during the next charging process according to the difference between the compared charging amounts. A charging current flowing through the piezo stack and a charging voltage applied to it may be measured during a charging process. It is preferable that the calculated charging amount be the amount of energy that is the result of the time quadrature of the product of the measured current and voltage.
摘要翻译：压电致动器驱动电路包括用于对可以通过充电和放电驱动的压电叠层进行充电的充电路径，用于计算压电叠层的充电量的运算电路和用于将计算的充电量与目标充电量，并根据比较充电量之间的差异，在下次充电过程中对充电量进行校正。可以在充电过程中测量流过压电叠层的充电电流和施加到其上的充电电压。优选地，所计算的充电量是作为测量的电流和电压的乘积的时间正交的结果的能量的量。

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