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    • 10. 发明申请
    • ABSOLUTE POSITION SENSING METHOD AND APPARATUS FOR SYNCHRONOUS ELEVATOR MACHINES BY DETECTION STATOR IRON SATURATION
    • 通过检测定子铁饱和度的同步电梯机器的绝对位置感测方法和装置
    • WO2002065139A2
    • 2002-08-22
    • PCT/US2002/003707
    • 2002-02-07
    • OTIS ELEVATOR COMPANY
    • MARVIN, Daryl, J.SIMONDS, Todd, A.PETROVIC, VladanSHEPARD, MarkVECCHIOTTI, Alberto
    • G01P3/00
    • H02P6/185H02P21/18
    • A method and apparatus of determining the position of a rotor relative to a stator in a synchronous motor elevator machine is presented. The method comprises injecting an AC current having a predetermined single frequency and a predetermined initial phase angle into a stator coil of the stator, and sampling the injected current and resultant voltage a predetermined number of times per period of the frequency. Subsequently the method calculates a stator inductance from the sampled voltages and currents using a DFT. By incrementing the initial phase angel a predetermined number of times over a 360 degree cycle, and repeating the injecting, sampling, and calculating with each incremented phase angle, the algorithm provides a predetermined number of calculated stator inductances. The position of the d axis relative to the stator is then determined from the minimum of the calculated stator inductances.
    • 提出了一种在同步电机中确定转子相对于定子的位置的方法和装置。 该方法包括将具有预定单个频率和预定初始相位角的AC电流注入到定子的定子线圈中,并且每个频率周期对注入的电流和合成电压进行预定次数的采样。 随后,该方法使用DFT从采样的电压和电流计算定子电感。 通过在360度循环中增加预定次数的初始相位角,并且以每个递增的相位角重复进行注入,采样和计算,算法提供预定数量的计算出的定子电感。 然后从计算的定子电感的最小值确定d轴相对于定子的位置。