3.2 \u8f90\u5c04\u4f20\u70ed\u8026\u5408\u6a21\u5757<\/h4>\n
\u4e3a\u7cbe\u786e\u91cf\u5316\u8f90\u5c04\u4f20\u70ed，\u5f15\u5165\u8f90\u5c04\u7f51\u7edc\u6a21\u578b\u4e0e\u8fed\u4ee3\u66f4\u65b0\u673a\u5236：<\/p>\n
- \n
- \u8f90\u5c04\u6362\u70ed\u5efa\u6a21：\u5c06PCB\u7cfb\u7edf\u4e2d\u7684\u5143\u4ef6\u8868\u9762\u3001\u57fa\u677f\u8868\u9762\u548c\u73af\u5883\u89c6\u4e3a\u7070\u4f53，\u57fa\u4e8e\u8868\u9762\u5bf9\u8868\u9762（S2S）\u6a21\u578b\u6784\u5efa\u8f90\u5c04\u7f51\u7edc，\u901a\u8fc7\u89d2\u7cfb\u6570\u63cf\u8ff0\u8868\u9762\u95f4\u8f90\u5c04\u8026\u5408\u7a0b\u5ea6\u3002<\/li>\n
- \u7b49\u6548\u6362\u70ed\u7cfb\u6570\u8f6c\u5316：\u5c06\u8f90\u5c04\u6362\u70ed\u91cf\u8f6c\u5316\u4e3a\u7b49\u6548\u5bf9\u6d41\u6362\u70ed\u7cfb\u6570，\u4f7f\u8f90\u5c04\u4f20\u70ed\u53ef\u76f4\u63a5\u878d\u5165\u4f20\u7edf\u70ed\u5e73\u8861\u65b9\u7a0b\u3002<\/li>\n
- \u8fed\u4ee3\u66f4\u65b0\u7b56\u7565：\u521d\u59cb\u5047\u8bbe\u7b49\u6548\u6362\u70ed\u7cfb\u6570\u4e3a0，\u6c42\u89e3\u4f20\u5bfc-\u5bf9\u6d41\u4e3b\u5bfc\u7684\u6e29\u5ea6\u573a；\u57fa\u4e8e\u8ba1\u7b97\u7ed3\u679c\u66f4\u65b0\u7b49\u6548\u6362\u70ed\u7cfb\u6570，\u91cd\u65b0\u6c42\u89e3\u70ed\u5e73\u8861\u65b9\u7a0b，\u76f4\u81f3\u6e29\u5ea6\u504f\u5dee\u5c0f\u4e8e0.1\u2103\u3002<\/li>\n<\/ul>\n
3.3 \u5143\u4ef6\u6e29\u5ea6\u7cbe\u51c6\u8ba1\u7b97\u6a21\u578b<\/h4>\n
\u4e3a\u89e3\u51b3\u4f20\u7edf\u65b9\u6cd5\u5143\u4ef6\u6e29\u5ea6\u8ba1\u7b97\u7c97\u653e\u7684\u95ee\u9898，\u5f15\u5165\u5143\u4ef6\u70ed\u963b\u53c2\u6570：<\/p>\n
- \n
- \u70ed\u963b\u53c2\u6570\u96c6\u6210：\u83b7\u53d6\u5143\u4ef6\u7684R\u03b8JC\u3001R\u03b8CS\u7b49\u53c2\u6570，\u5c06\u5176\u4f5c\u4e3a\u4e32\u8054\u70ed\u963b\u5d4c\u5165\u70ed\u5e73\u8861\u65b9\u7a0b\u3002<\/li>\n
- \u6e29\u5ea6\u5173\u8054\u65b9\u7a0b：\u5143\u4ef6\u7ed3\u6e29（Tj）\u4e0e\u57fa\u677f\u6e29\u5ea6（Ts）\u7684\u5173\u7cfb\u4e3a：Tj = Ts + P\u00b7(R\u03b8JC + R\u03b8CS)，\u5176\u4e2dP\u4e3a\u5143\u4ef6\u529f\u8017\u3002<\/li>\n
- \u591a\u70ed\u6e90\u53e0\u52a0：\u5f53\u5b58\u5728\u591a\u4e2a\u5143\u4ef6\u65f6，\u91c7\u7528\u53e0\u52a0\u539f\u7406\u8ba1\u7b97\u5404\u5143\u4ef6\u5bf9PCB\u6e29\u5ea6\u573a\u7684\u8d21\u732e\u3002<\/li>\n<\/ul>\n
3.4 \u6548\u7387\u4f18\u5316：\u591a\u91cd\u7f51\u683c\u7b56\u7565<\/h4>\n
\u4e3a\u63d0\u5347\u8ba1\u7b97\u6548\u7387，\u5728\u91d1\u5c5e\u5c42\u79bb\u6563\u5316\u4e2d\u5f15\u5165\u4e09\u7ea7\u591a\u91cd\u7f51\u683c（\u7c97\u3001\u4e2d\u3001\u7ec6）：<\/p>\n
- \n
- \u7c97\u7f51\u683c：\u7528\u4e8e\u5168\u5c40\u6e29\u5ea6\u573a\u5feb\u901f\u6c42\u89e3，\u52a0\u901f\u6536\u655b\u3002<\/li>\n
- \u7ec6\u7f51\u683c：\u5bf9\u5143\u4ef6\u4e0b\u65b9\u3001\u8d70\u7ebf\u5bc6\u96c6\u533a\u7b49\u70ed\u70b9\u533a\u57df\u52a0\u5bc6，\u7cbe\u51c6\u6355\u6349\u5c40\u90e8\u6e29\u5ea6\u5cf0\u503c\u3002<\/li>\n
- \u6570\u636e\u4f20\u9012：\u901a\u8fc7\u63d2\u503c\u7b97\u6cd5\u5b9e\u73b0\u4e0d\u540c\u7f51\u683c\u5c42\u7ea7\u95f4\u7684\u6e29\u5ea6\u3001\u70ed\u6d41\u6570\u636e\u4f20\u9012，\u603b\u8ba1\u7b97\u65f6\u95f4\u7f29\u77ed40%\u4ee5\u4e0a\u3002<\/li>\n<\/ul>\n
4 \u5b9e\u9a8c\u9a8c\u8bc1\u4e0e\u7ed3\u679c\u5206\u6790<\/h3>\n
4.1 \u5b9e\u9a8c\u8bbe\u7f6e<\/h4>\n
\u4ee5\u865a\u62dfDC-DC\u7535\u6e90PCB\u4e3a\u6848\u4f8b，\u53c2\u6570\u5982\u4e0b：<\/p>\n
- \n
- PCB\u5c3a\u5bf8：300mm\u00d7300mm，\u539a\u5ea64mm，\u6709\u6548\u70ed\u4f20\u5bfc\u7cfb\u657054 W\/(m\u00b7K)，\u6709\u6548\u5bf9\u6d41\u7cfb\u657015 W\/(m\u00b2\u00b7K)\u3002<\/li>\n
- \u5143\u4ef6\u5e03\u5c40：\u5305\u542b\u529f\u7387MOSFET\u3001\u7535\u611f\u3001\u7535\u5bb9\u7b4912\u4e2a\u5143\u4ef6，\u603b\u529f\u8017200W\u3002<\/li>\n
- \u73af\u5883\u6e29\u5ea6：25\u2103，\u53d1\u5c04\u73870.9\u3002<\/li>\n<\/ul>\n
4.2 \u9a8c\u8bc1\u65b9\u6cd5<\/h4>\n
- \n
- \u5bf9\u6bd4\u6a21\u578b：\u4e0eCOMSOL Multiphysics\u4e2d\u6784\u5efa\u7684FEM\u6a21\u578b\u5bf9\u6bd4，\u9a8c\u8bc1\u8fed\u4ee3\u65b9\u6cd5\u7684\u6709\u6548\u6027\u3002<\/li>\n
- \u7cbe\u5ea6\u8bc4\u4f30：\u57fa\u4e8eRichardson\u5916\u63a8\u6cd5\u4f30\u7b97\u5efa\u6a21\u7cbe\u5ea6，\u8bef\u5dee\u5b9a\u4e49\u4e3a\u6539\u8fdb\u65b9\u6cd5\u4e0eCOMSOL\u6a21\u578b\u7ed3\u679c\u7684\u504f\u5dee\u767e\u5206\u6bd4\u3002<\/li>\n<\/ul>\n
4.3 \u7ed3\u679c\u5206\u6790<\/h4>\n
- \n
- \u6e29\u5ea6\u5206\u5e03：\u6539\u8fdb\u65b9\u6cd5\u9884\u6d4b\u7684PCB\u8868\u9762\u6e29\u5ea6\u4e0eCOMSOL\u6a21\u578b\u9ad8\u5ea6\u4e00\u81f4，\u6700\u5927\u504f\u5dee4.2%，\u51fa\u73b0\u5728\u529f\u7387MOSFET\u4e0b\u65b9\u533a\u57df\u3002<\/li>\n
- \u5143\u4ef6\u6e29\u5ea6：\u5143\u4ef6\u7ed3\u6e29\u9884\u6d4b\u8bef\u5dee\u5c0f\u4e8e3\u2103，\u6ee1\u8db3\u5de5\u7a0b\u9700\u6c42\u3002<\/li>\n
- \u8ba1\u7b97\u6548\u7387：\u6539\u8fdb\u65b9\u6cd5\u8ba1\u7b97\u65f6\u95f4\u8f83COMSOL\u7f29\u77ed65%，\u8f83\u4f20\u7edfFVM\u65b9\u6cd5\u63d0\u534750%\u4ee5\u4e0a\u3002<\/li>\n<\/ul>\n
5 \u5e94\u7528\u573a\u666f\u4e0e\u524d\u666f<\/h3>\n
5.1 \u9ad8\u529f\u7387\u7535\u5b50\u8bbe\u5907<\/h4>\n
\u5982LED\u9a71\u52a8\u677f\u3001\u529f\u7387\u653e\u5927\u5668\u3001DC-DC\u7535\u6e90\u7b49，\u6539\u8fdb\u65b9\u6cd5\u53ef\u7cbe\u51c6\u9884\u6d4b\u70ed\u70b9\u6e29\u5ea6，\u4f18\u5316\u6563\u70ed\u8bbe\u8ba1，\u907f\u514d\u8fc7\u70ed\u5931\u6548\u3002\u4f8b\u5982，\u5728\u67d0\u9ad8\u6027\u80fd\u8ba1\u7b97\u673a\u4e3b\u677f\u70ed\u8bbe\u8ba1\u4e2d，\u91c7\u7528\u6539\u8fdb\u65b9\u6cd5\u540e\u5173\u952e\u5143\u4ef6\u6e29\u5ea6\u964d\u4f4e12\u2103，\u7cfb\u7edf\u53ef\u9760\u6027\u663e\u8457\u63d0\u5347\u3002<\/p>\n
5.2 \u6781\u7aef\u73af\u5883\u7535\u5b50\u8bbe\u5907<\/h4>\n
\u5728\u822a\u7a7a\u822a\u5929\u3001\u6c7d\u8f66\u7535\u5b50\u7b49\u6781\u7aef\u6e29\u5ea6\u73af\u5883\u4e0b，\u8f90\u5c04\u4f20\u70ed\u5360\u6bd4\u663e\u8457\u3002\u6539\u8fdb\u65b9\u6cd5\u53ef\u63d0\u5347\u70ed\u5efa\u6a21\u7cbe\u5ea6，\u4fdd\u969c\u8bbe\u5907\u5728\u771f\u7a7a\u6216\u9ad8\u6e29\u73af\u5883\u4e2d\u7684\u7a33\u5b9a\u6027\u3002<\/p>\n
5.3 \u9ad8\u5bc6\u5ea6\u96c6\u6210\u7cfb\u7edf<\/h4>\n
\u9488\u5bf9\u670d\u52a1\u5668\u4e3b\u677f\u3001\u667a\u80fd\u624b\u673aPCB\u7b49\u5143\u4ef6\u5bc6\u96c6\u5e03\u5c40\u573a\u666f，\u6539\u8fdb\u65b9\u6cd5\u901a\u8fc7\u591a\u91cd\u7f51\u683c\u7b56\u7565\u5e73\u8861\u8ba1\u7b97\u7cbe\u5ea6\u4e0e\u6548\u7387，\u652f\u6301\u5feb\u901f\u8bbe\u8ba1\u8fed\u4ee3\u3002<\/p>\n
6 \u7ed3\u8bba\u4e0e\u5c55\u671b<\/h3>\n
6.1 \u7814\u7a76\u7ed3\u8bba<\/h4>\n
\u672c\u6587\u63d0\u51fa\u7684\u6539\u8fdb\u6570\u503c\u89e3\u6790\u6cd5PCB\u70ed\u5efa\u6a21\u65b9\u6cd5，\u901a\u8fc7\u8026\u5408\u89e3\u6790\u89e3\u4e0e\u6570\u503c\u65b9\u6cd5\u3001\u5f15\u5165\u8f90\u5c04\u4f20\u70ed\u6a21\u5757\u53ca\u5143\u4ef6\u70ed\u963b\u53c2\u6570，\u89e3\u51b3\u4e86\u4f20\u7edf\u65b9\u6cd5\u5ffd\u7565\u8f90\u5c04\u3001\u5143\u4ef6\u6e29\u5ea6\u8ba1\u7b97\u7c97\u653e\u3001\u6548\u7387\u4f4e\u4e0b\u7684\u95ee\u9898\u3002\u5b9e\u9a8c\u9a8c\u8bc1\u8868\u660e，\u8be5\u65b9\u6cd5\u5728\u6e29\u5ea6\u9884\u6d4b\u7cbe\u5ea6（\u8bef\u5dee<5%）\u548c\u8ba1\u7b97\u6548\u7387\u4e0a\u5747\u4f18\u4e8e\u4f20\u7edf\u65b9\u6cd5，\u4e3aPCB\u70ed\u8bbe\u8ba1\u63d0\u4f9b\u53ef\u9760\u7406\u8bba\u652f\u6491\u3002<\/p>\n
6.2 \u672a\u6765\u5c55\u671b<\/h4>\n
- \n
- \u591a\u7269\u7406\u573a\u8026\u5408：\u7ed3\u5408\u6d41\u4f53-\u56fa\u4f53\u8026\u5408\u5206\u6790，\u6a21\u62df\u5f3a\u5236\u98ce\u51b7\u6216\u6db2\u51b7\u573a\u666f\u4e0b\u7684\u70ed\u884c\u4e3a\u3002<\/li>\n
- \u667a\u80fd\u4f18\u5316\u7b97\u6cd5：\u96c6\u6210\u673a\u5668\u5b66\u4e60\u6216\u9057\u4f20\u7b97\u6cd5，\u5b9e\u73b0\u6563\u70ed\u7ed3\u6784\u7684\u81ea\u52a8\u4f18\u5316\u8bbe\u8ba1\u3002<\/li>\n
- \u5148\u8fdb\u5c01\u88c5\u6280\u672f：\u9488\u5bf9Chip-on-Board（CoB）\u30013D\u5c01\u88c5\u7b49\u65b0\u578b\u7ed3\u6784，\u62d3\u5c55\u70ed\u5efa\u6a21\u65b9\u6cd5\u7684\u5e94\u7528\u8303\u56f4\u3002<\/li>\n<\/ul>\n
📚2 \u8fd0\u884c\u7ed3\u679c<\/h3>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260222144912-699b1768b1b89.png\")
<\/p>\n\u00a0
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260222144913-699b176933725.png\")
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/02\/20260222144913-699b1769b32b0.png\")
<\/p>\n<\/p>\n\u90e8\u5206\u4ee3\u7801：<\/p>\n
load('current_fault');time1=time;current1=current; load('current_swing');time2=time;current2=current; load('current_fault_during_swing');time3=time;current3=current;<\/p>\n
N=20;%number of samples in one cycle<\/p>\n
for p=1:length(time1) \u00a0\u00a0 \u00a0DI1(p)=0; \u00a0\u00a0 \u00a0if p>=2*N-1 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0for q=0:N-1 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0DI1(p)=DI1(p)+(current1(-q+p-3)-3*current1(-q+p-2)+3*current1(-q+p-1)-current1(-q+p)+mean(current1(-q+p-N+1:-q+p)))^2; \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0end\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0end end<\/p>\n
%fprintf('Minimum (DI) in fault case = %g\\\\n',min(DI1)); fprintf('Maximum (DI) in fault case = %g\\\\n',max(DI1));<\/p>\n
for p=1:length(time2) \u00a0\u00a0 \u00a0DI2(p)=0; \u00a0\u00a0 \u00a0if p>=2*N-1 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0for q=0:N-1 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0DI2(p)=DI2(p)+(current2(-q+p-3)-3*current2(-q+p-2)+3*current2(-q+p-1)-current2(-q+p)+mean(current2(-q+p-N+1:-q+p)))^2; \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0end\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0end end<\/p>\n
%fprintf('Minimum (DI) in power swing case = %g\\\\n',min(DI2)); fprintf('Maximum (DI) in power swing case = %g\\\\n',max(DI2));<\/p>\n
for p=1:length(time3) \u00a0\u00a0 \u00a0DI3(p)=0; \u00a0\u00a0 \u00a0if p>=2*N-1 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0for q=0:N-1 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0DI3(p)=DI3(p)+(current3(-q+p-3)-3*current3(-q+p-2)+3*current3(-q+p-1)-current3(-q+p)+mean(current3(-q+p-N+1:-q+p)))^2; \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0 \u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0end\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0 \u00a0\u00a0 \u00a0end end<\/p>\n
%fprintf('Minimum (DI) in fault during power swing case = %g\\\\n',min(DI3)); fprintf('Maximum (DI) in fault during power swing case = %g',max(DI3));<\/p>\n
subplot(1,3,1);plot(time1,DI1);xlim([0.6,0.75]);ylim([0,110]);grid on;xlabel('Time (s)');ylabel('DI'); title('Fault'); subplot(1,3,2);plot(time2,DI2);xlim([2,3]);ylim([0,110]);grid on;xlabel('Time (s)');ylabel('DI'); title('Power Swing'); subplot(1,3,3);plot(time3,DI3);xlim([2,2.3]);ylim([0,110]);grid on;xlabel('Time (s)');ylabel('DI'); title('Fault during Power Swing'); saveas(gcf, '..\/results\/testSMIB.png');<\/p>\n
🎉3\u00a0\u53c2\u8003\u6587\u732e<\/h3>\n
\u90e8\u5206\u7406\u8bba\u6765\u6e90\u4e8e\u7f51\u7edc，\u5982\u6709\u4fb5\u6743\u8bf7\u8054\u7cfb\u5220\u9664\u3002<\/p>\n
🌈<\/span>4 Matlab\u4ee3\u7801\u3001\u6570\u636e\u3001\u6587\u7ae0\u4e0b\u8f7d<\/h3>\n","protected":false},"excerpt":{"rendered":"
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