The Anti-phase compensation method is a commonly used technique in the electromagnetic compatibility (EMC) design of Boost converters. However

many complex factors affect the ability of the Anti-phase compensation method to suppress common-mode noise. In engineering practice

trial-and-error methods are often employed to repeatedly adjust the parameters of the Anti-phase compensation method to enhance common-mode noise suppression. Currently

there is a lack of effective forward-design methods for the common-mode electromagnetic interference (EMI) characteristics of the Anti-phase compensation method. To address this issue

this paper establishes a common-mode insertion loss evaluation model for the Anti-phase compensation method based on the transformer's T-model. The sensitivity of common-mode noise suppression to factors such as compensation capacitor parameters

the number of turns and winding methods of the compensation winding

and parasitic parameters is analyzed. A design guideline for compensation capacitor parameters is proposed

based on the principle of optimal low-frequency common-mode noise suppression. Additionally

a design guideline for Anti-phase compensation magnetic components is proposed

based on the insertion loss performance evaluation factor. Furthermore

combining a full-circuit EMI simulation model

a forward-design method for the common-mode EMI characteristics of the Anti-phase compensation method is proposed. Experimental results show that the forward-design method not only ensures effective suppression of low-frequency noise but also significantly improves the suppression of mid-frequency and high-frequency common-mode noise. This contributes to the miniaturization of filters and shortens the design cycle for EMC performance in Boost converters.