Based　on　dsPIC33F　series　microcontroller　and　the　full　bridge　drive　circuit　built　by　BridgeSwitch1267C　integrated　half-bridge　chip,　this　paper　designs　an　integrated　intelligent　contactor　controller　with　the　function　of　voltage　drop　resistance:　The　volume　and　cost　of　the　control　module　are　further　reduced　by　reusing　the　rectifier　output　voltage　regulator　capacitor　as　a　backup　power　supply;　With　the　intelligent　control　strategy　of　flux　closed-loop　starting,　silent　energy　saving　reliable　holding　and　negative　pressure　rapid　breaking,　the　control　module　not　only　has　the　function　of　resisting　voltage　drop,　but　also　takes　into　account　the　dynamic　performance　of　contact　bounce　suppression,　noise　elimination　and　arc　erosion　reduction;　By　controlling　the　drive　circuit　alone,　the　control　module　can　gently　switch　among　starting,　normal　holding,　voltage　drop　resistance　holding　and　breaking,　which　reducing　the　coil　excitation　loop　and　increasing　the　reliability　of　the　control　module.　©　Beijing　Paike　Culture　Commu.　Co.,　Ltd.　2024.