Although　the　direct　torque　control　(DTC)　for　permanent　magnet　synchronous　generators　(PMSG)　has　many　advantages　such　as　quick　responses　of　the　torque　and　the　output　DC　voltage,　an　accurate　stator　flux　linkage　estimation　must　be　demanded　to　achieve　these　good　performances.　The　applied　stator　flux　linkage　estimator　must　be　robust　to　PMSG　parameter　variations　because　the　actual　PMSG　parameters　vary　with　operation　points.　A　novel　stator　flux　linkage　estimator　was　proposed　in　this　paper.　The　rotor　position　angle　was　estimated　based　on　the　active　flux　concept　in　the　presented　estimator,　and　then　the　voltage　model　of　stator　flux　linkage　was　connected　with　the　current　model　with　the　estimated　rotor　position　angle.　The　vector　product　of　the　estimated　stator　current　and　the　actual　current　was　sent　to　a　PI　modulation,　and　then　the　estimated　rotor　position　angle　was　adjusted　with　the　PI　output　in　order　to　decrease　estimation　errors　of　the　stator　flux　linkage　phase.　The　experimental　results　show　that　the　presented　flux　linkage　estimator　is　insensitive　to　parameter　changes　of　PMSG　and　the　sampling　errors　of　analog　quantities　without　rotor　speed　and　parameter　identification,　which　ensures　an　accurate　stator　flux　linkage　estimation,　and　the　torque　and　the　DC　generating　voltage　are　controlled　quickly　and　smoothly　with　the　proposed　stator　flux　linkage　estimator.　©　2012　Chin.　Soc.　for　Elec.　Eng.