This　paper　presents　a　new　sensorless　vector　control　system　for　general-purpose　induction　motors　by　taking　into　account　iron　loss,　in　which　a　current-observer-based　method　and　the　model　reference　adaptive　system　(MRAS)　theory　are　applied.　Since　the　current　observer　is　constructed　in　a　synchronously　rotating　reference　frame　with　respect　to　the　current　model　and　the　parallel　exiting　circuit　of　iron　loss　resistance　is　used,　the　proposed　system　is　simple　and　the　compensation　of　iron　loss　is　directly　realized　while　calculating　rotor　fluxes　and　slip　frequency.　The　accuracies　of　estimated　torque　and　speed　are　improved.　The　effectiveness　of　the　proposed　system　has　been　verified　by　digital　simulation　and　experimentation.