压降型pwm外文翻译--基于降压型pwm开关电源的建模、仿真和减少传导电磁干扰(编辑修改稿)

压降型pwm外文翻译--基于降压型pwm开关电源的建模、仿真和减少传导电磁干扰(编辑修改稿)内容摘要：

r electronics converters are considered as an important source of electromagic interference and have corrupting effects on the electric works 2 . High level of pollution resulting from various disturbances reduces the quality of power in electric works. On the other side some residential, mercial and especially medical consumers are so sensitive to power system disturbances including voltage and frequency variations. The best solution to reduce corruption and improve power quality is plying national or international EMC regulations. CISPR, IEC, FCC and VDE are among the most famous organizations from Europe, USA and Germany who are responsible for determining and publishing the most important EMC regulations. IEC and VDE requirement and limitations on conducted emission are shown in Fig. 3 and Fig. 4 7 9 . For different groups of consumers different classes of regulations could be plied. Class A for mon consumers and class B with more hard limitations for special consumers are separated in Fig. 3 and Fig. 4. Frequency range of limitation is different for IEC and VDE that are 150 kHz up to 30 MHz and 10 kHz up to 30 MHz respectively. Compliance of regulations is evaluated by parison of measured or calculated conducted interference level in the mentioned frequency range with the stated requirements in regulations. In united European munity pliance of regulation is mandatory and products must have certified label to show covering o f requirements 8 . IV. ELECTROMAGNETIC CONDUCTED INTERFERENCE MEASUREMENT A. Line Impedance Stabilization Network (LISN) 1Providing a low impedance path to t。