In　this　paper,　the　chopper　control　technology　was　introduced　into　the　intelligent　control　of　the　AC　contactor　and　an　AC　contactor　control　module　starting　with　closed　loop　chopping　has　been　designed.　With　this　control　module,　the　AC　contactor　has　the　functions　of　closed-loop　DC　starting,　closed-loop　DC　keeping　and　anti-voltage　sag.　The　proposed　control　module　not　only　satisfies　enterprises　for　high-capacity　AC　contactors　with　the　function　of　anti-voltage　sag　but　also　makes　it　more　robust.　Starting　closed　loop　uses　coil　current　as　feedback　and　allows　the　module　to　adjust　the　contactor　coil　current　quickly.　The　optimization　of　starting　process　can　be　realized　easier.　The　keeping　closed　loop　can　use　coil　voltage　or　coil　current　as　feedback,　it　depends　on　the　coil　resistance.　According　to　the　control　principle,　the　transient　analysis　and　the　AC　analysis　have　been　made,　this　paper　also　analyzed　the　suppression　measures　of　current　spike　and　designed　the　compensation　network.　The　experimental　results　verify　the　validity　of　the　control　module.　©　2013　Chinese　Society　for　Electrical　Engineering.