壓降型pwm外文翻譯--基于降壓型pwm開關(guān)電源的建模、仿真和減少傳導(dǎo)電磁干擾-全文預(yù)覽
【正文】 p 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 transfer power from source to power electronics converter and load. 2Providing a low impedance path from interference source, here power electronics converter, to measurement port. Variation of LISN impedance versus frequency with the mentioned topology is presented in Fig. 7. LISN has stabilized impedance in the range of conducted EMI measurement ??7 . Variation of level of signal at the output of LISN versus frequency is the spectrum of interference. The electromagic patibility of a system can be evaluated by parison of its interference spectrum with the standard limitations. The level of signal at the output of LISN in frequency range 10 kHz up to 30 MHz or 150 kHz up to 30 MHz is criterion of patibility and should be under the standard limitations. In practical situations, the LISN output is connected to a spectrum analyzer and interference measurement is carried out. But for modeling and simulation purposes, the LISN output spectrum is calculated using appropriate software. 基于壓降型 PWM 開關(guān)電源的建模、仿真和減少傳導(dǎo)性電磁干擾 I 一 .前言
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