Method and device for measuring the electric power of a universal electric motor powered by sinusoidal alternating voltage
    1.
    发明授权
    Method and device for measuring the electric power of a universal electric motor powered by sinusoidal alternating voltage 有权
    用于测量由正弦交流电供电的通用电动机的功率的方法和装置

    公开(公告)号:US08447542B2

    公开(公告)日:2013-05-21

    申请号:US12864950

    申请日:2008-12-19

    IPC分类号: G01R21/00

    摘要: A method measures the electric power of a universal electric motor (4) connected to an electric power mains (6) by a Triac (7) and supplied by sinusoidal alternating voltage (V(t)). The method determines a first (ton) and a second (toff) instant at which the current (I(t)) supplied to the motor (4) passes from a zero value to a value other than zero. The current supplied to the motor (4) at a third instant between the first (ton) and second (toff) instant is measured. A fitting current time pattern (f(t)) approximating the real time pattern of the current (I(t)), and which has a zero current value at the first (ton) and second (toff) instant, and a current value equal to a sampled current at the third instant (tin), is determined. The mean electric power is calculated on the basis of the fitting current time pattern (f(t)).

    摘要翻译: 一种测量通过三端双向可控硅(7)连接到电力总线(6)并由正弦交流电压(V(t))提供的通用电动机(4)的电力。 该方法确定提供给电动机(4)的电流(I(t))从零值到不为零的值的第一(ton)和第二(toff)时刻。 测量在第一(ton)和第二(toff)瞬间之间的第三时刻提供给电动机(4)的电流。 接近电流(I(t))的实时模式的拟合当前时间模式(f(t)),并且在第一(ton)和第二(toff)时刻具有零电流值,以及当前值 等于在第三时刻(锡)的采样电流。 基于拟合当前时间模式(f(t))计算平均功率。

    Method and Device for Measuring the Electric Power of a Universal Electric Motor Powered by Sinusoidal Alternating Voltage
    2.
    发明申请
    Method and Device for Measuring the Electric Power of a Universal Electric Motor Powered by Sinusoidal Alternating Voltage 有权
    用正弦交流电源供电的通用电动机的功率测量方法和装置

    公开(公告)号:US20100324843A1

    公开(公告)日:2010-12-23

    申请号:US12864950

    申请日:2008-12-19

    IPC分类号: G01R21/06 G01R19/00

    摘要: A method of measuring the electric power of a universal electric motor (4) connected to an electric power mains (6) by a Triac (7) and supplied by sinusoidal alternating voltage (V(t)), the method determining a first (ton) and a second (toff) instant at which the current (I(t)) supplied to the motor (4) passes from a zero value to a value other than zero; measuring the current supplied to the motor (4) at a third instant between the first (ton) and second (toff) instant; determining a fitting current time pattern (f(t)) approximating the real time pattern of the current (I(t)), and which has a zero current value at the first (ton) and second (toff) instant, and a current value equal to a sampled current at the third instant (tin); and calculating the mean electric power on the basis of the fitting current time pattern (f(t)).

    摘要翻译: 一种测量通过三端双向可控硅开关(7)连接到电力电源(6)并由正弦交流电压(V(t))提供的通用电动机(4)的电力的方法,该方法确定第一 )和提供给电动机(4)的电流(I(t))从零值到不为零的值的第二(toff)时刻; 在第一(ton)和第二(toff)时刻之间的第三时刻测量提供给电动机(4)的电流; 确定近似电流(I(t))的实时模式的拟合当前时间模式(f(t)),并且在第一(ton)和第二(toff)时刻具有零电流值,以及电流 值等于第三时刻的采样电流(tin); 并根据拟合当前时间模式(f(t))计算平均功率。