设计说明书 开关电源的电磁兼容性研究.pdfVIP

１ 1.1 开关电源EMC 研究现状 １ 1.2 电磁兼容国际和国内标准 ２ EMI 2.1 开关电源电磁干扰产生的机理 2.2 电磁干扰源 2.3 电磁干扰的耦合途径 １ 3.1 Multisim 仿真软件的特点 １ 3.2 开关电源传导仿真及分析 １ 3.3 抑制开关电源传导干扰仿真及分析 １ １ 4.1 电路措施 １ 4.2 元器件的选择 ２ 4.3 屏蔽 ２ 4.4 PCB 抗干扰设计 ２ 4.5 带有无源共模抑制电路的仿真电路 ２２ ２ i ２ ２ ii 【摘要】：电磁兼容性是指设备或系统在其电磁环境中能正常工作，且不对该环境中任 何事物构成不能承受的电磁干扰的能力。论文的主要内容包括以下几个方面：系统地调研和 分析了电磁兼容的概念、电磁兼容的研究内容及其国内外的研究现状和研究领域，对电磁兼 容做了进一步的认识。对电磁干扰机理进行了初步的研究。从电路选择、元器件选择、屏 蔽、印刷电路板抗干扰等几个方面，对开关电源电磁干扰的抑制措施进行了分析讨论。 【关键词】：开关电源；电磁兼容；抑制；仿真 [Abstract]: Electromagnetic compatibilit , being refer to the equipment or s stem that can work normall in its electromagnetic environment and an thing in the environment cant afford to have the abilit of electromagnetic interference. The main contests are the following: the concept of EMC, the researched content of EMC, the current research in domestic and foreign, and it will made depth comprehension to EMC. It studies electromagnetic interference mechanism deepl . And it also makes a preliminar stud on the mechanism of electromagnetic interference. It will make a discussion and anal ze of switch power suppl EMI suppression measures from the selection of the circuit, components ,and technique of shielding, the abilit of anti- j amming that the PCB own. [Ke words]:Switching power suppl ,electromagnetic compatibilit ;inhibition; simulation iii 电源是电子