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    • 1. 发明专利
    • Power conversion device for system interconnection
    • 用于系统互连的电源转换器
    • JP2014168351A
    • 2014-09-11
    • JP2013039647
    • 2013-02-28
    • Kawasaki Heavy Ind Ltd川崎重工業株式会社
    • SAKIMOTO KENICHISUGIMOTO KAZUSHIGESHINDO YUJI
    • H02M1/00H02M7/48H02J3/38
    • H02M1/00H02J3/381H02J3/383H02J3/387H02J2003/388H02M7/53875H02M7/539H02M2001/0009H02P9/102H02P9/105H02P21/0017Y02E10/563
    • PROBLEM TO BE SOLVED: To provide a power converter which can continue operation to variation in the system voltage or frequency, without using a PLL circuit for system frequency detection.SOLUTION: A control unit 12 includes an AVR model unit 70 for calculating the inductive voltage of a virtual generator, a governor and a drive source model unit 80 for calculating a drive torque for driving the virtual generator, a power generation torque calculation unit 40 for calculating the power generation torque of the virtual generator, a rotation angle calculation unit 50 for calculating the rotation angle of a rotor based on at least the acceleration torque and inertia of the virtual generator rotor, a voltage d-q conversion unit 60 for calculating the d-axis component and q-axis component of an output voltage by using the rotation angle of a rotor, and a generator model unit 30 for calculating the d-axis current command value and a q-axis current command value, corresponding to the d-axis component and q-axis component of the armature current of the virtual generator, by using an algebraic expression defined by a phasor diagram representing the relationship of the inductive voltage and phase voltage and line current of a synchronous generator.
    • 要解决的问题:提供一种可以继续运行以改变系统电压或频率的功率转换器,而不使用用于系统频率检测的PLL电路。解决方案:控制单元12包括用于计算感应电压的AVR模型单元70 用于计算用于驱动虚拟发电机的驱动转矩的虚拟发电机,调速器和驱动源模型单元80,用于计算虚拟发电机的发电转矩的发电转矩计算单元40,用于 至少基于虚拟发电机转子的加速转矩和惯性来计算转子的转角;电压dq转换单元60,用于通过使用旋转角度来计算输出电压的d轴分量和q轴分量 转子和用于计算d轴电流指令值的发电机模型单元30和对应于d轴公式的d轴电流指令值 通过使用由表示电感电压和相电压与同步发电机的线电流的关系的相量图定义的代数表达式,虚拟发电机的电枢电流的组成和q轴分量。
    • 2. 发明专利
    • Motor drive system
    • 电机驱动系统
    • JP2013135593A
    • 2013-07-08
    • JP2011286423
    • 2011-12-27
    • Kawasaki Heavy Ind Ltd川崎重工業株式会社
    • SHINDO YUJIKURODA MASANORISAWADA MASASHIKINOSHITA YUJI
    • H02P27/06H02M7/48H02M7/493
    • PROBLEM TO BE SOLVED: To drive a double three-phase motor by an inverter so as to suppress fluctuation of a magnetic flux and reduce loss of the motor.SOLUTION: A motor 4 includes first and second coil groups having induction voltages of mutually reverse polarities. A motor drive system includes a power conversion device 1 which generates a first three-phase AC voltage and applies it to the first coil group, a power conversion device 2 which generates a second three-phase AC voltage and applies it to the second coil group and a controller 3. The controller 3 receives supply of a third three-phase AC voltage, generates a carrier wave having a triangular wave voltage waveform and controls the power conversion device 1 so as to generate the first three-phase AC voltage by executing pulse width modulation using a triangular wave comparison system on the basis of the carrier wave and the third three-phase AC voltage, and controls the power conversion device 2 so as to generate the second three-phase AC voltage by executing the pulse width modulation using the triangular wave comparison system on the basis of the carrier wave and an inversion voltage of the third three-phase AC voltage.
    • 要解决的问题:通过逆变器驱动双相三相电动机,以便抑制磁通的波动并减少电动机的损耗。电动机4包括具有相反极性的感应电压的第一和第二线圈组 。 电动机驱动系统包括产生第一三相AC电压并将其施加到第一线圈组的电力转换装置1,产生第二三相AC电压并将其施加到第二线圈组的电力转换装置2 控制器3接收第三三相AC电压的供给,产生具有三角波电压波形的载波,并且控制电力转换装置1,以通过执行脉冲来产生第一三相AC电压 基于载波和第三三相交流电压,使用三角波比较系统进行宽度调制,并且通过使用第三三相交流电压执行脉宽调制来控制功率转换装置2以产生第二三相交流电压 三角波比较系统基于载波和第三相三相交流电压的反相电压。
    • 3. 发明专利
    • Rectifying device
    • 整修装置
    • JP2005287251A
    • 2005-10-13
    • JP2004100974
    • 2004-03-30
    • Kawasaki Heavy Ind Ltd川崎重工業株式会社
    • MATSUO KAZUYANORO OSAMUKAWAMURA MASAHIDESHINDO YUJI
    • H02M7/08H02M7/06
    • PROBLEM TO BE SOLVED: To provide a rectifying device capable of reducing generation of harmonic waves. SOLUTION: A phase-shifting transformer 4 generates two pairs of three-phase VAC voltage having phase difference of 20° from a three-phase VAC voltage supplied from a three-phase AC power supply 2. The two pairs of three-phase AC voltage are respectively subjected to full wave rectification by a first to a third three-phase full wave rectifying circuits 5A, 5B, 5C. When the outputs of the first to the third three-phase full wave rectifying circuits 5A, 5B, 5C are rectified by a three-phase bridge rectifying circuit 7 through three-phase interphase reactors 6A, 6B on positive and negative pole sides, so that commutation in the three-phase bridge rectifying circuit 7 is performed at the point where 20°, as the interval of commutation of the first to the third three-phase full wave rectifying circuits 5A, 5B, 5C, is equally divided into three, so that a 54-stage stepwise alternating current is inputted from the three-phase AC power supply 2, thus reducing the harmonic waves included in the three-phase VAC from the three-phase AC power supply 2. COPYRIGHT: (C)2006,JPO&NCIPI
    • 要解决的问题:提供能够减少谐波产生的整流装置。 解决方案:移相变压器4产生与三相AC电源2提供的三相VAC电压相差20°的两对三相VAC电压。 三相交流电压分别由第一至第三三相全波整流电路5A,5B,5C进行全波整流。 当第一至第三三相全波整流电路5A,5B,5C的输出由三相桥式整流电路7通过正极侧和负极侧的三相相间电抗器6A,6B整流时,使得 在第一到第三三相全波整流电路5A,5B,5C的换向间隔被等分成三个的地方,在20°的点处执行三相桥式整流电路7中的换向,因此 从三相交流电源2输入54级的逐级交流电流,从而从三相交流电源2减少包含在三相VAC中的谐波。(C) 2006年,JPO&NCIPI
    • 7. 发明专利
    • CONTROLLING METHOD FOR AC SERVO MOTOR
    • JPH05328780A
    • 1993-12-10
    • JP14865392
    • 1992-05-14
    • KAWASAKI HEAVY IND LTD
    • NOMURA KOJISHINDO YUJIYOSHIKAWA TAKAHIRO
    • H02P6/06H02P6/02
    • PURPOSE:To obtain a method for controlling an AC servo motor which can optimally control even if detection of a rotary angle is executed at a predetermined period and in which a control error is small even if an output voltage holding period is long by using an estimated rotary angle as a rotary angle of d-q-shaft reverse conversion. CONSTITUTION:When a servo motor 4 is controlled, a controller 5 is started, a rotary angle detector 2 and a current detector 3 are started, and then a torque command value is input from an input unit 1. Then, the detector 3 detects currents iu, iv, iw, and the detector 2 obtains an electric angle phi1 from the number of pole pairs (p) of the motor. Thereafter, d- and q-axis currents iq, id are calculated by power rectification by a coordinate transformation matrix based on the calculated angle phi1, d- and q-axis voltages Vq, Vd corresponding to the calculated currents iq, id are calculated, and an estimated electric angle phi2 is calculated. Voltages Vu, Vv, Vw are calculated by inversion by a coordinate transformation reverse matrix based on the calculated estimated electric angle phi2, applied to the motor 4, and repeated until a torque command value is altered.
    • 9. 发明专利
    • Position sensor apparatus for magnetic bearing and magnetic bearing apparatus
    • 磁性轴承和磁性轴承装置的位置传感器装置
    • JP2009244124A
    • 2009-10-22
    • JP2008091459
    • 2008-03-31
    • Kawasaki Heavy Ind Ltd川崎重工業株式会社
    • KURODA MASANORISHINDO YUJISAWADA MASASHIHASHIMOTO MASAYUKINISHIMURA TETSUOAOTA TAKEHIROKINOSHITA YUJI
    • G01D5/20F16C32/04F16C41/00
    • F16C32/0446F16C32/0489
    • PROBLEM TO BE SOLVED: To make a position sensor apparatus compact and improve the sensitivity of a position sensor in thrust directions.
      SOLUTION: The position sensor apparatus is provided with stators and a rotor. The stators have four groups of teeth in each layered steel plate for every 90 degrees and are formed by displacing and superposing three layered steel plates made by winding a sensor coil on each of the teeth. The rotor is a ring-like layered steel plate arranged at a prescribed interval inside the stators and is opposed to first-layer and third-layer stators. Changes in the inductance of each sensor coil at positions intersecting with each other of a second-layer stator are detected on the basis of two electric potential differences generated in first and second bridge circuits constituted in such a way as to include each inductance to measure displacements in radial directions. Changes in the inductance of each sensor coil of the first-layer and third-layer stators are detected on the basis of an electric potential difference generated in a third bridge circuit constituted in such a way as to include each inductance to form a slip sensor and measure displacements in thrust directions.
      COPYRIGHT: (C)2010,JPO&INPIT
    • 要解决的问题:使位置传感器装置紧凑并提高位置传感器在推力方向上的灵敏度。

      解决方案:位置传感器装置设有定子和转子。 定子在每个层叠钢板中每90度具有四组齿,并且通过将通过将传感器线圈缠绕在每个齿上而制成的三层钢板来形成。 转子是在定子内以规定间隔排列的与第一层和第三层定子相对的环状层状钢板。 基于在第一和第二桥接电路中产生的两个电位差来检测每个传感器线圈在与第二层定子相互交叉的位置处的电感的变化,所述第一和第二桥接电路以包括每个电感以测量位移的方式 在径向方向。 基于在第三桥式电路中产生的电位差来检测第一层和第三层定子的每个传感器线圈的电感的变化,该第三桥式电路构成为包括每个电感以形成滑动传感器, 测量推力方向的位移。 版权所有(C)2010,JPO&INPIT

    • 10. 发明专利
    • Magnetic bearing device
    • 磁力轴承装置
    • JP2009243635A
    • 2009-10-22
    • JP2008093245
    • 2008-03-31
    • Kawasaki Heavy Ind Ltd川崎重工業株式会社
    • SHINDO YUJIHASHIMOTO MASAYUKIYAMAUCHI MASASHIKINOSHITA YUJIABE KAZUHIRO
    • F16C32/04
    • PROBLEM TO BE SOLVED: To provide a magnetic bearing device capable of carrying out favorable position control of a rotary shaft by preventing degradation of detection accuracy by a reluctance type displacement sensor. SOLUTION: The magnetic bearing device is equipped with a thrust magnetic bearing A having a rotary disk with a peripheral part 3a comprising a magnetic body and a pair of thrust electromagnets 21, 22 wherein a current flowing through the thrust electromagnets 21, 22 is controlled in response to an axial displacement amount of a rotary shaft 2 to control an axial position of the rotary shaft 2, a radial magnetic bearing B having a rotor core 11 and a plurality of radial electromagnets 23 fixed to a surface of the rotary shaft 2 wherein a current flowing through the radial electromagnets 23 is controlled in response to a radial displacement amount of the rotary shaft 2 to control a radial position of the rotary shaft 2, and the reluctance type displacement sensor S detecting the axial displacement amount and the radial displacement amount of the rotary shaft 2. It is composed such that a path from the peripheral part 3a of the rotary disc 3 to the rotary shaft 2 via a center part 3b is magnetically blocked. COPYRIGHT: (C)2010,JPO&INPIT
    • 解决的问题:提供一种能够通过防止由磁阻型位移传感器导致的检测精度的劣化来进行旋转轴的良好位置控制的磁性轴承装置。 解决方案:磁性轴承装置配备有具有旋转盘的推力磁轴承A,其具有包括磁体的周边部分3a和一对推力电磁体21,22,其中流过推力电磁体21,22的电流 根据旋转轴2的轴向位移量来控制旋转轴2的轴向位置,具有转子芯11的径向磁轴承B和固定在旋转轴的表面上的多个径向电磁铁23 2,其中响应于旋转轴2的径向位移量来控制流过径向电磁体23的电流以控制旋转轴2的径向位置,并且磁阻型位移传感器S检测轴向位移量和径向 旋转轴2的位移量被构成为使得经由中心部3b i从旋转盘3的周边部3a到旋转轴2的路径 磁阻。 版权所有(C)2010,JPO&INPIT