GE DS200FPSAG1ABB电风扇电源板
其中：Re（g）=相量的实分量Im（g）＝相量的虚分量g＝N个数字样本的集合＝{g0，g1，…，gN-1}gN＝来自g的第N个样本N＝样本数f0＝基本频率（赫兹）ω0＝2πf0＝角频率（弧度）T＝1/（f0N）＝样本之间的时间PQM跟踪存储器特性用于计算相量。对于所有电流和电压输入，跟踪存储器功能在两个周期内每个周期采样16次。将N=16（样本/周期）代入方程，得出相量的实部和虚部分量如下：设k1=cos（π/8），k2=cos（π/4），k3=cos（3π/8）；实部和虚部的方程式简化为：通过不重复两次相同的减法，可以减少实部和虚部计算之间的减法次数。重复以下减法：代入上述“delta”值将形成用于计算相量的方程式：触发跟踪存储器触发跟踪存储器可用于检测和记录系统干扰。
where:Re(g) = Real component of phasor Im(g) = Imaginary component of phasor g = Set of N digital samples = {g0, g1,..., gN-1} gn = nth sample from g N = Number of samples f0 = Fundamental frequency in Hertz ω0 = 2πf0 = Angular frequency in radians T = 1 /(f0N) = Time between samples The PQM Trace Memory feature is employed to calculate the phasors. The Trace Memory feature samples 16 times per cycle for two cycles for all current and voltage inputs. Substituting N = 16 (samples/cycle) into the equations yields the following for the real and imaginary components of the phasor: Let k1 = cos(π/8), k2 = cos(π/4), k3 = cos(3π/8); the equations for the real and imaginary components are reduced to:The number of subtractions can be reduced between the calculations of real and imaginary components by not repeating the same subtraction twice. The following subtractions are repeated:Substituting in the above ‘delta’ values results in the form of the equations that will be used to calculate the phasors:Triggered Trace Memory The Triggered Trace Memory can be used to detect and record system disturbances.
