相对运动，换位思考，定生动，繁化简，形不变而神变。
频繁开合有气动，大力开合有液压，精度高地电机站，为人服务百年传。
本例中采用了自耦变压器降压启动，变频调速，反接制动的方式对交流电机的上述过程进行分析和仿真。
源码：
|
parameter Real K=0.8"starting rate"; parameter Real a=0.544"frequency rate"; parameter Real b=0.0683"stable frequency rate"; parameter Real c=0.3893"another frequency rate"; parameter Real P=0.7"stoping rate"; Tl = 15; if time <= 10 then u_A = 0; u_B = 0; u_C = 0; f_s = 0; Rs = 0.531; elseif time<=1590 then f_s = f_N*a; Rs = 0.531; u_A = u_N * 1.414 * sin(2*Pi*f_s*time/1000)*a; u_B = u_N * 1.414 * sin(2*Pi*f_s*time/1000-2*Pi/3)*a; u_C = u_N * 1.414 * sin(2*Pi*f_s*time/1000-4*Pi/3)*a; elseif time<=1640 then f_s = f_N*a; Rs = 5; u_A = u_N * 1.414 * sin(2*Pi*f_s*time/1000-4*Pi/3)*a; u_B = u_N * 1.414 * sin(2*Pi*f_s*time/1000-2*Pi/3)*a; u_C = u_N * 1.414 * sin(2*Pi*f_s*time/1000)*a; elseif time<=2550 then f_s = f_N*a; Rs = 0.531; u_A = u_N * 1.414 * sin(2*Pi*f_s*time/1000-4*Pi/3)*a; u_B = u_N * 1.414 * sin(2*Pi*f_s*time/1000-2*Pi/3)*a; u_C = u_N * 1.414 * sin(2*Pi*f_s*time/1000)*a; elseif time<=3050 then f_s = f_N*b; Rs = 0.531; u_A = u_N * 1.414 * sin(2*Pi*f_s*time/1000)*b; u_B = u_N * 1.414 * sin(2*Pi*f_s*time/1000-2*Pi/3)*b; u_C = u_N * 1.414 * sin(2*Pi*f_s*time/1000-4*Pi/3)*b; elseif time<=3150 then f_s = f_N*K*c; Rs = 0.531; u_A = u_N * 1.414 * sin(2*Pi*f_s*time/1000-4*Pi/3)*K*c; u_B = u_N * 1.414 * sin(2*Pi*f_s*time/1000-2*Pi/3)*K*c; u_C = u_N * 1.414 * sin(2*Pi*f_s*time/1000)*K*c; elseif time<=4400 then f_s = f_N*c; Rs = 0.531; u_A = u_N * 1.414 * sin(2*Pi*f_s*time/1000-4*Pi/3)*c; u_B = u_N * 1.414 * sin(2*Pi*f_s*time/1000-2*Pi/3)*c; u_C = u_N * 1.414 * sin(2*Pi*f_s*time/1000)*c; elseif time<=4450 then f_s = f_N*P*a; Rs = 4; u_A = u_N * 1.414 * sin(2*Pi*f_s*time/1000)*a*P; u_B = u_N * 1.414 * sin(2*Pi*f_s*time/1000-2*Pi/3)*a*P; u_C = u_N * 1.414 * sin(2*Pi*f_s*time/1000-4*Pi/3)*a*P; elseif time<=5400 then f_s = f_N*a; Rs = 0.531; u_A = u_N * 1.414 * sin(2*Pi*f_s*time/1000)*a; u_B = u_N * 1.414 * sin(2*Pi*f_s*time/1000-2*Pi/3)*a; u_C = u_N * 1.414 * sin(2*Pi*f_s*time/1000-4*Pi/3)*a; else f_s = f_N*b; Rs = 0.531; u_A = u_N * 1.414 * sin(2*Pi*f_s*time/1000)*b; u_B = u_N * 1.414 * sin(2*Pi*f_s*time/1000-2*Pi/3)*b; u_C = u_N * 1.414 * sin(2*Pi*f_s*time/1000-4*Pi/3)*b; end if; end SACIM; |
耗时5400ms，过渡较平滑，转矩稳定在200Nm内，电流也控制地比较稳定，但转矩变化时的波动剧烈不规律。总结了一些但感觉书上一些方法没有具体算式无法实验。就剩电阻和调频两大流派，各占半边天。
