公开(公告)号：US4678990A

公开(公告)日：1987-07-07

申请号：US795197

申请日：1985-11-05

申请人： John Bicknell ,  Stephen O'Brien

发明人： John Bicknell ,  Stephen O'Brien

IPC分类号： G01R31/34 ,  G01R31/12 ,  G01R23/00 ,  G01R23/16

CPC分类号： G01R31/343

摘要： A signal analysis system for a magnetic field motor monitor utilizes an analog-to-digital converter for sampling the motor magnetic field at accurately determined and equally spaced times synchronized with the line frequency driving the motor. A plurality of separate memories are provided to accumulate the respective samples which are added to or subtracted from the contents of respective memories, depending on which of the samples is being processed as indicated by control bits in a status register. Signals indicative of the amplitudes of respective harmonically related frequency components of the motor magnetic field are provided from the contents of the memories by combining the respective in phase and quadrature values. A monitor provides an indication of when there has been a change in these combined signals.

摘要翻译： 用于磁场电动机监视器的信号分析系统利用模数转换器，以与驱动电动机的线路频率同步的精确确定和等间隔的时间采样电动机磁场。 根据状态寄存器中的控制位所指示的哪个样本正在被处理，提供多个单独的存储器以累加相加或相减各个存储器的内容的相应采样。 通过组合各自的相位和正交值，从存储器的内容提供表示电动机磁场的各个谐波相关频率分量的振幅的信号。 监视器提供这些组合信号何时发生变化的指示。