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    • 3. 发明授权
    • Method of measuring unsaturated inductances of an equivalent circuit of
a synchronous machine
    • 测量同步电机等效电路不饱和电感的方法
    • US5309089A
    • 1994-05-03
    • US928347
    • 1992-08-12
    • Mitsuhiro Kawamura
    • Mitsuhiro Kawamura
    • G01R31/34G01R27/26H02K19/36H02P27/06
    • G01R27/2611
    • A method of measuring unsaturated inductances of an equivalent circuit of a synchronous machine including measuring a no-load saturation characteristic of a synchronous machine; measuring a three-phase short-circuit characteristic of the synchronous machine; measuring currents and voltages of an armature and a field when an armature coil and a field coil are in a positional relationship wherein a magnetomotive force by flowing current to the armature coil of the synchronous machine becomes a direct-axis magnetomotive force and both when the field coil is in an open-circuit state and when the field coil is in a short-circuit state by direct-axis Dalton-Cameron method; and solving simultaneous equations concerning a direct-axis equivalent circuit of the synchronous machine by using results of the measuring the no-load saturation characteristic, the measuring the three-phase short-circuit characteristic and the measuring by the direct-axis Dalton-Cameron method, thereby obtaining impedances of respective elements constituting the direct-axis equivalent circuit.
    • 一种测量同步电机的等效电路的不饱和电感的方法,包括测量同步电机的空载饱和特性; 测量同步电机的三相短路特性; 当电枢线圈和励磁线圈处于位置关系时,测量电枢和场的电流和电压,其中通过流向同步电机的电枢线圈的电流的磁动势变为直轴磁动势,并且当场 线圈处于开路状态,当励磁线圈通过直轴道尔顿 - 卡梅伦方法处于短路状态时; 并通过使用测量空载饱和特性的结果,测量三相短路特性和通过直轴道尔顿 - 卡梅伦方法测量的方法来解决同步电机的直轴等效电路的联立方程 从而获得构成直轴等效电路的各元件的阻抗。
    • 9. 发明授权
    • Apparatus for measuring the time constant of the direct-axis damper of a
synchronous machine
    • 用于测量同步电机直轴阻尼器时间常数的装置
    • US5202620A
    • 1993-04-13
    • US775573
    • 1991-10-15
    • Mitsuhiro Kawamura
    • Mitsuhiro Kawamura
    • G01R31/34H02K11/00H02K19/00
    • G01R31/343
    • An apparatus for measuring the time constant of the direct-axis damper of a synchronous machine is designed such that a voltage from a d.c. power source is applied by switching to armature windings of two phases, so that an armature current rises and thereafter it keeps a constant value. A current induced on a direct-axis damper diminishes at a moderate rate of the direct-axis damper time constant, and this decreasing current and the constant armature current flow inside the synchronous machine. In response to a change in the induction current on the direct-axis damper caused by the transition of the armature current to the steady state, a voltage induced on the field winding rises sharply and then falls gradually. The time length until the field winding voltage falls to a prescribed level is measured as the time constant of the direct-axis damper with such a measuring device as an electromagnetic oscilloscope.
    • 用于测量同步电机的直轴阻尼器的时间常数的装置被设计成使得来自直流电的电压。 通过切换到两相电枢绕组来施加电源,使得电枢电流上升,之后其保持恒定值。 在直轴阻尼器上引起的电流以直轴阻尼时间常数的适中速率减小,同步电机内的这种减小的电流和恒定的电枢电流流动。 响应于由电枢电流向稳态转变引起的直轴阻尼器上的感应电流的变化,励磁绕组上引起的电压急剧上升然后逐渐下降。 直到磁场绕组电压下降到规定电平的时间长度被测量为具有诸如电磁示波器的测量装置的直轴阻尼器的时间常数。
    • 10. 发明授权
    • Linear motor
    • 直线电机
    • US4542312A
    • 1985-09-17
    • US596823
    • 1984-04-03
    • Mitsuhiro Kawamura
    • Mitsuhiro Kawamura
    • H02K41/02H05B6/34
    • H02K41/02H05B6/34
    • A linear motor having phase armature windings which are not completely contained within a partial space of an iron core of the linear motor. The phase armature windings consist of a phase armature winding which is entirely contained within the partial space and positioned at the ends of the partial space with respect to the travelling direction of the magnetic field produced by the linear motor and of other phase armature windings which are not completely contained within the partial space. The number of the turns of the former phase armature winding is arranged to be larger than the summed number of turns of the latter phase armature windings. The former phase armature winding may be a concentric winding while the latter phase armature windings are body-belt-like windings.
    • 具有不完全容纳在线性电动机的铁芯的部分空间内的相位电枢绕组的线性电动机。 相电枢绕组由相电枢绕组构成,该相电枢绕组完全包含在部分空间内,并且相对于由线性电动机和其它相位电枢绕组产生的磁场的行进方向位于部分空间的端部 不完全包含在部分空间内。 前一相电枢绕组的匝数被布置成大于后一相电枢绕组的相加匝数。 前一相电枢绕组可以是同心绕组,而后一相电枢绕组是体带状绕组。