公开(公告)号：US20050052095A1

公开(公告)日：2005-03-10

申请号：US10936028

申请日：2004-09-08

Applicant: Yasuaki Kasai ,  Masahiro Nishio

Inventor： Yasuaki Kasai ,  Masahiro Nishio

IPC: H02N2/00 ,  H01L41/04 ,  H01L41/083 ,  H01L41/09

CPC classification number: H02N2/004 ,  H02N2/008 ,  H02N2/026

Abstract: An ultrasonic actuator driving apparatus which drives an ultrasonic transducer formed by alternately laminating a piezoelectric plate and an internal electrode, by applying a frequency signal to the ultrasonic transducer, includes an oscillating unit which generates the frequency signal for driving the ultrasonic transducer, a driving unit which amplifies the frequency signal and applies the signal to the ultrasonic transducer based on an output from the oscillating unit, a vibration information detecting unit which detects vibration information of the ultrasonic transducer, and, a control unit which detects a frequency near a resonant one of the ultrasonic transducer based on the vibration information, sets the detected frequency as a driving frequency of the ultrasonic transducer, and controls the oscillating unit so as to generate the frequency signal based on the driving frequency.

Abstract translation: 一种超声波致动器驱动装置，其通过向超声波振子施加频率信号来驱动通过交替层叠压电板和内部电极而形成的超声波换能器，包括产生用于驱动超声波换能器的频率信号的振荡单元，驱动单元 其放大所述频率信号，并基于来自所述振荡单元的输出将所述信号施加到所述超声波换能器;振动信息检测单元，其检测所述超声波换能器的振动信息;以及控制单元，其检测所述超声波振子附近的谐振频率附近的频率 基于振动信息的超声波换能器将检测频率设定为超声波换能器的驱动频率，并且控制振荡单元，以便基于驱动频率产生频率信号。

公开(公告)号：US20050116583A1

公开(公告)日：2005-06-02

申请号：US10966966

申请日：2004-10-15

Applicant: Masahiro Nishio ,  Yasuaki Kasai

Inventor： Masahiro Nishio ,  Yasuaki Kasai

IPC: H02N2/00 ,  H01L41/04 ,  H01L41/09

CPC classification number: H02N2/008 ,  H01L41/0913 ,  H02N2/026

Abstract: A method is provided to drive an ultrasonic-actuator by supplying an alternating signal to an ultrasonic transducer in which piezoelectric plates and internal electrodes are alternately stacked. A frequency at which a phase difference between a voltage and current of the alternating signal is in a predetermined state is detected from a frequency range in which an amplitude ratio between the voltage and the current of the alternating signal is more than or equal to a predetermined value, and the driving frequency is set to the detected frequency.

Abstract translation: 提供了一种通过向压电板和内部电极交替堆叠的超声波换能器提供交流信号来驱动超声致动器的方法。 从交变信号的电压和电流之间的振幅比大于或等于预定的频率范围检测出交变信号的电压和电流之间的相位差处于预定状态的频率， 值，驱动频率设定为检测频率。

公开(公告)号：US08531084B2

公开(公告)日：2013-09-10

申请号：US13180731

申请日：2011-07-12

Applicant: Yasuaki Kasai

Inventor： Yasuaki Kasai

IPC: H02N2/00

CPC classification number: H02N2/103 ,  H02N2/004

Abstract: According to one embodiment, an ultrasonic motor unit includes a piezoelectric element, a holder member, a pressing member, a pressing auxiliary member, a driven member, an ultrasonic motor accommodation member, a power extraction member. The piezoelectric element has a rectangular cross-sectional shape. The holder member holds the piezoelectric element so as to cover an outer surface of a portion of the piezoelectric element. The pressing member applies a predetermined pressing force to the piezoelectric element. The pressing auxiliary member transfers a pressing force generated by the pressing member to the holder member. The driven member is in contact with one end face of the piezoelectric element. The power extraction member is coupled to the ultrasonic motor accommodation member to form a joint portion. The ultrasonic motor unit is formed by connecting a plurality of sections each formed by coupling the ultrasonic motor accommodation member to the power extraction member.

Abstract translation: 根据一个实施例，超声波马达单元包括压电元件，保持器构件，按压构件，按压辅助构件，从动构件，超声波马达容纳构件，动力提取构件。 压电元件具有矩形横截面形状。 保持器构件保持压电元件以覆盖压电元件的一部分的外表面。 按压构件对压电元件施加预定的按压力。 按压辅助构件将由按压构件产生的按压力传递到保持构件。 从动构件与压电元件的一个端面接触。 功率提取构件联接到超声波马达容纳构件以形成接合部分。 超声波马达单元通过将通过将超声波马达容纳构件联接形成的多个部分连接到功率提取部件而形成。

公开(公告)号：US07635940B2

公开(公告)日：2009-12-22

申请号：US11986409

申请日：2007-11-21

Applicant: Yoshihiro Ue ,  Yasuaki Kasai ,  Nagahide Sakai ,  Makoto Harada

Inventor： Yoshihiro Ue ,  Yasuaki Kasai ,  Nagahide Sakai ,  Makoto Harada

IPC: H01L41/09

CPC classification number: H01L41/0913 ,  G02B21/26 ,  H01L41/083 ,  H02N2/026

Abstract: An ultrasonic motor includes a vibrator formed by stacking a plurality of rectangular piezoelectric plates in a thickness direction, a driving circuit for applying a driving signal to a piezoelectric plate, and a detection circuit for detecting an electromotive force generated when the piezoelectric plate deforms, and this ultrasonic motor is configured in such a manner that there are a first piezoelectric plate and a second piezoelectric plate among the plurality of rectangular piezoelectric plates, the first and the second piezoelectric plate each is a piezoelectric plate in which a longitudinal vibration polarization portion that can excite longitudinal vibrations and a bending vibration polarization portion that can excite bending vibrations are polarized in a thickness direction, and the first piezoelectric plate is connected to the driving circuit and the detection circuit, and the second piezoelectric plate is connected to the driving circuit and is not connected to the detection circuit.

Abstract translation: 超声波马达包括通过在厚度方向堆叠多个矩形压电板形成的振动器，用于向压电板施加驱动信号的驱动电路和用于检测当压电板变形时产生的电动势的检测电路，以及 该超声波马达的构成是，在多个矩形压电板之间存在第一压电板和第二压电板，第一和第二压电板均为压电板，其中纵向振动极化部分 激励纵向振动和可激发弯曲振动的弯曲振动极化部分在厚度方向上极化，第一压电板连接到驱动电路和检测电路，第二压电板连接到驱动电路，并且 没有连接到检测器 n电路。

公开(公告)号：US5399311A

公开(公告)日：1995-03-21

申请号：US975081

申请日：1992-11-12

Applicant: Yasuaki Kasai ,  Hiyoshi Yamada ,  Norio Yoshikawa

Inventor： Yasuaki Kasai ,  Hiyoshi Yamada ,  Norio Yoshikawa

IPC: H01F1/053 ,  H01F7/02 ,  H01F13/00 ,  H01F41/02 ,  H02K1/27 ,  H02K15/03 ,  H01F41/16

CPC classification number: H01F41/028 ,  H01F7/021 ,  H02K1/2733 ,  H02K15/03 ,  Y10S264/58

Abstract: A magnet is formed as a ring magnet and magnetized by radial application of a magnetic field while the intensity of the magnetic field is changed periodically along the circumference of the ring magnet to give a circumferentially sinusoidal waveform distribution of magnetic flux density to the ring magnet in the magnetized state of the magnet.

Abstract translation: 磁体形成为环形磁铁，并通过磁场的径向施加磁化，同时磁场的强度沿着环形磁体的圆周周期性地改变，从而给予环形磁体的磁通密度的圆周正弦波形分布 磁体的磁化状态。

公开(公告)号：US07791796B2

公开(公告)日：2010-09-07

申请号：US11820740

申请日：2007-06-20

Applicant: Yoshihiro Ue ,  Yasuaki Kasai ,  Katsuji Horiuchi

Inventor： Yoshihiro Ue ,  Yasuaki Kasai ,  Katsuji Horiuchi

IPC: G02B21/26

CPC classification number: G02B21/26 ,  H02N2/026 ,  H02N2/028

Abstract: A motorized table apparatus comprises: a support unit for supporting a movement table so as to allow it to move in a single axis direction relative to a stationary unit which is fixed to the movement table; a slide member which is equipped on the movement table and which has a length equivalent to, or more than, a moving range of the movement table; an ultrasonic oscillators which is equipped on the stationary unit, which moves the movement table, and which comprises a single piezoelectric body and two drive elements; and a pressure application unit for supporting so that the two drive elements of the ultrasonic oscillator and the slide member are pressed by a constant force, wherein a plurality of the ultrasonic oscillators are equipped.

Abstract translation: 电动台装置包括：支撑单元，用于支撑移动台，以便允许其相对于固定到移动台的固定单元在单个轴线方向上移动; 滑动构件，其配置在所述移动台上，其长度等于或大于所述移动台的移动范围; 设置在固定单元上的超声波振荡器，其移动移动台，并且包括单个压电体和两个驱动元件; 以及压力施加单元，用于支撑使得超声波振荡器和滑动构件的两个驱动元件被恒定的力按压，其中配备有多个超声波振荡器。

公开(公告)号：US07732983B2

公开(公告)日：2010-06-08

申请号：US12272159

申请日：2008-11-17

Applicant: Yasuaki Kasai

Inventor： Yasuaki Kasai

IPC: H02N2/00

CPC classification number: H02N2/004 ,  G02B7/08 ,  H02N2/0055 ,  H02N2/026

Abstract: A ultrasonic motor includes a piezoelectric device, and friction contact members moves a driven body by a elliptical vibration. And the ultrasonic motor includes a holder member which is disposed corresponding to a node of a longitudinal vibration or in the vicinity thereof on the face of the piezoelectric device and a node of a flexural vibration or in the vicinity thereof, the holder member having an engagement convex portion and being provided with a pair of sliding contact projection portions, a position limiting member which has accommodation holes each constituted of a sliding contact concave portion for accommodating the sliding contact projection portion such that it makes a sliding contact therewith freely and an engagement concave portion for accommodating the engagement convex portion, and a pressure member which presses the holder member so as to bring the friction contact members into pressure contact with the driven body.

Abstract translation: 超声波马达包括压电装置，摩擦接触构件通过椭圆振动使被驱动体移动。 并且超声波马达包括：与压电装置的表面上的纵向振动的节点或其附近相对应地设置的保持构件和弯曲节点或其附近，保持构件具有接合 凸部，并且设置有一对滑动接触突出部，位置限制构件，其具有容纳所述滑动接触突起部的滑动接触凹部，以使其与其自由滑动接触的接合凹部和接合凹部 用于容纳接合凸部的部分，以及压紧构件，其按压保持构件以使摩擦接触构件与被驱动体压力接触。

公开(公告)号：US5402025A

公开(公告)日：1995-03-28

申请号：US168209

申请日：1993-12-17

Applicant: Makoto Saito ,  Yasuaki Kasai ,  Hiyoshi Yamada ,  Norio Yoshikawa

Inventor： Makoto Saito ,  Yasuaki Kasai ,  Hiyoshi Yamada ,  Norio Yoshikawa

IPC: H02K1/27 ,  H02K21/12

CPC classification number: H02K1/2733

Abstract: A rotor comprises a rotor body and a ring-shaped rare earth metal-iron type magnet arranged therearound, in which a low thermal-expansion material is inserted between the rotor body and the magnet.

Abstract translation: 转子包括转子体和布置在其周围的环形稀土金属 - 铁型磁体，其中低热膨胀材料插入在转子体和磁体之间。

公开(公告)号：US5129963A

公开(公告)日：1992-07-14

申请号：US674257

申请日：1991-03-25

Applicant: Viswanathan Panchanathan ,  Teruo Watanabe ,  Yasuaki Kasai ,  Norio Yoshikawa ,  Yutaka Yoshida

Inventor： Viswanathan Panchanathan ,  Teruo Watanabe ,  Yasuaki Kasai ,  Norio Yoshikawa ,  Yutaka Yoshida

IPC: C22C38/00 ,  C22C1/04 ,  C22C38/10 ,  H01F1/053 ,  H01F1/057

CPC classification number: H01F1/0576 ,  C22C1/0441

Abstract: The ability to hot work RE-Fe-B type compositions to form anisotropic magnets containing Nd.sub.2 Fe.sub.14 B.sub.1 -type crystal grains is improved by the addition of suitable, small amounts of one or more of cerium, lanthanum or yttrium. The improvement in hot working is seen in the reduction of cracks in the deformed body and in the ability to reduce the hot working temperature without a significant penalty in magnetic properties.

Abstract translation: 通过添加合适少量的铈，镧或钇中的一种或多种，​​可以改善热加工RE-Fe-B型组合物以形成含有Nd 2 Fe 14 B 1型晶粒的各向异性磁体的能力。 在变形体的裂纹减少以及降低热加工温度的能力下，在磁特性上没有显着损失的情况下，观察到热加工的改善。

公开(公告)号：US5122319A

公开(公告)日：1992-06-16

申请号：US673549

申请日：1991-03-22

Applicant: Teruo Watanabe ,  Yasuaki Kasai ,  Hiyoshi Yamada ,  Norio Yoshikawa ,  Yutaka Yoshida

Inventor： Teruo Watanabe ,  Yasuaki Kasai ,  Hiyoshi Yamada ,  Norio Yoshikawa ,  Yutaka Yoshida

IPC: B22F3/02 ,  B30B11/02 ,  H01F1/057 ,  H01F41/02

CPC classification number: H01F1/0576 ,  B22F3/02 ,  B30B11/02 ,  H01F41/0266 ,  Y10S264/58

Abstract: A method of forming a cylindrical compact for a cylindrical magnet is improved by moving a core pin and a die of a mold at the same time of pressing magnet materials with a pressing punch in the same direction as that of the pressing punch at travelling speed Vc and Vd indicated by following equation:Vc=m.multidot.Vp(0.5.ltoreq.m.ltoreq.1.0)Vd=n.multidot.Vp(0.5.ltoreq.n.ltoreq.1.0)where Vc is the travelling speed of the core pin, Vd is the travelling speed of the die and Vp is the pressing speed of the pressing punch. It is possible to form the thin-walled elongated cylindrical compact by utilizing the frictional force caused between the mold and the magnet materials for forming the compact very effectively in order to obtain a thin walled elongated cylindrical magnet.