The　Electromagnetic　Damping　Generator　(EDG)　used　for　petroleum　exploration　is　faced　with　the　problem　of　high　local　temperature　during　its　downhole　work.　To　avoid　the　damage　to　its　internal　circuit　caused　by　high　temperature,　the　key　EDG　circuit　is　required　to　be　heat-resistant　based　on　the　electromagnetic　induction　principle　and　the　current　heating　effect.　First　of　all,　the　working　condition　with　the　maximum　heating　power　was　figured　out　after　studying　the　heating　power　characteristics　of　EDG.　Then　the　multi-field　coupling　model　of　the　temperature　field,　electromagnetic　field　and　structure　of　the　damper,　as　well　as　its　iterative　analytic　model　were　established　to　identify　the　relationship　between　the　temperature　rise　of　the　key　location　of　the　damper　part　and　its　working　time　in　the　downhole　environment　and　the　room-temperature　experimental　environment,　which　provided　data　support　for　EDG　optimization　design.　Finally,　a　EDG　prototype　was　developed,　and　the　test　bench　was　set　up　by　replacing　the　load　with　resistors　to　verify　the　accuracy　of　the　iterative　analytical　model.　The　results　showed　that　the　temperature　value　calculated　by　the　model　well　fit　the　experimental　value.　Therefore,　the　downhole　operation　reliability　of　the　EDG　and　the　safety　of　corresponding　bench　tests　are　guaranteed,　which　has　certain　guiding　significance　for　EDG　optimization　design　and　its　experimental　study.　©　2024　–　IOS　Press.　All　rights　reserved.