To　fully　understand　and　objectively　evaluate　the　influence　of　magnetic　integration　technology　on　the　performance　of　switched-mode　converter　at　steady　state　and　transient　state,　a　general　small　signal　model　needs　to　be　established.　In　this　paper,　based　on　integrated　magnetic　component　analysis　and　the　state-space　averaging　method,　three　small-signal　modeling　methods　of　switched-mode　converter　with　magnetic　integration　have　been　respectively　proposed.　These　methods　can　provide　a　theoretical　basis　for　dynamic　characteristics　study　and　control　design　of　such　converters.　An　active　clamped　forward　converter　with　magnetic　integration　has　been　taken　as　an　example　to　illustrate　the　proposed　modeling　methods.　©　2015,　The　editorial　office　of　Transaction　of　China　Electrotechnical　Society.　All　right　reserved.