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上图为电感电流内环补偿前的bode图
电感电流内环使用PI补偿,我算出了电感电流内环补偿前的bode图,它的转折频率为13000rad/sec,那么我该怎么选择补偿后的穿越频率呢?
下图为参数和TI补偿的结果
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我算出的Kp只有0.0367,比文档上的小多了
%matlab函数计算Kip
clear
PI = 3.1415926;
Kpwm = 400;
R = 14.4;
C = 20 * 10^(-6);
L = 300 * 10^(-6);
Alpha = 2.27 / 14.2; % 2.27V/14.2A
Kii = 13000;
Ficut = 1200;%电流环穿越频率
s = 2*PI*Ficut*i;
GIpiNum = Kpwm * Alpha * (s + Kii) * (R*C*s + 1);
GIpiDen = R*L*C*s^3 + L*s^2 + R*s;
Kip = 1/abs(GIpiNum/GIpiDen)
