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附上论文,还有自己写的径向充磁永磁体内置时的matlab程序,仿真出来结果很乱,同样的方法径向充磁永磁体外置的B就仿真出来了(这里只是求的气隙处磁密),很奇怪,帮**看一下吧!!!
- clc;clear all;
- %永磁体内置式
- num = 11; %11次谐波
- g = 0.0025; %气隙宽度
- taup = 0.06;%永磁体宽度
- hm = 0.005; %永磁体径向厚度
- taum = 0.044; %永磁体高度
- hw = 0.0325; %绕组厚度
- Rr = 0.078; %永磁体外径
-
- miur = 1.05;%回复磁导率
- Brem = 1.2;%剩磁
- Rm = 0.083; %永磁体内径
- Rs = 0.118; %电枢内径
- r = 0.08425;%气隙半径
- alphap = taum/taup;
- %利用卡特系数修正Rs
- % taut=0.02;%齿距
- % b0=0.0012;%槽宽
- % g1=g+hm/miur;
- % b=b0/(2*g1);
- % v=(b0/(2*g1*tan(b))-0.5*log(1+b*2))*(4/pi);
- % kc=taut/(taut-v*g1);%卡特系数
- % ge=g+(kc-1)*g1;
- % Rs=Rm+ge;
- for n = 1:num
-
- Mn = (2*n-1)*pi/taup;
- Pn = (4/taup)*Brem*sin(2*n-1)*(pi/2)*alphap;
- a = 1e-3;
- fa = 0;
- fb = 0;
- for x = Mn*Rr:a:Mn*Rm
- f1 = besselk(1,x)/(besseli(1,x)*besselk(0,x)+besselk(1,x)*besseli(0,x));
- f2 = besseli(1,x)/(besseli(1,x)*besselk(0,x)+besselk(1,x)*besseli(0,x));
- fa = fa+f1;
- fb = fb+f2;
- end
- FAn = Pn/Mn*a*fa;
- FBn = Pn/Mn*a*fb;
- C1n = besseli(0,Mn*Rs);
- C2n=besselk(0,Mn*Rs);
- C3n = besseli(0,Mn*Rr);
- C4n=besselk(0,Mn*Rr);
- C5n = besseli(0,Mn*Rm);
- C6n=besselk(0,Mn*Rm);
- C7n = besseli(1,Mn*Rm);
- C8n=besselk(1,Mn*Rm);
- a1n = (FAn*C5n/C6n+FBn)/(miur*(C5n/C6n-C1n/C2n)-(C5n/C6n-C3n/C4n));
- a2n = (FAn*C7n/C8n-FBn)/((C7n/C8n+C1n/C2n)-(C7n/C8n+C3n/C4n));
- b1n = C1n/C2n*a1n;
- b2n = C3n/C4n*a2n;
- zn = 0;
- for z = 0:1e-3:2*taup
- zn = zn+1;
- B1z(n,zn) = (a1n*besseli(0,Mn*r)-b1n*besselk(0,Mn*r))*sin(Mn*z);
- B1r(n,zn) = -((a1n*besseli(1,Mn*r)+b1n*besselk(1,Mn*r))*cos(Mn*z));
- end
- B1zn=sum(B1z);B1rn=sum(B1r);
- end
-
- z = 0:1e-3:2*taup;
- figure(1)
- plot(z,B1zn,'g',z,B1rn,'b')
- title('气隙处沿z方向与r方向磁密大小');
- xlabel('Z');
- ylabel('B');
- legend('z','r');
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