We　have　proposed　a　q-axis　flux　observer　based　speed　sensorless　vector　control　for　induction　motors　with　stator　resistance　identification.　A　linear　model　of　proposed　system　is　derived　and　the　trajectories　of　poles　and　zeros　are　shown　to　study　the　stability　limit.　A　simulation　program　is　developed　including　the　effects　of　discrete　algorithm　of　proposed　method,　PWM　mechanism　and　the　characteristic　of　IGBT.　The　system　stability　for　various　parameters　are　discussed　in　detail　by　comparing　the　experimental　results　with　the　simulation　results.　©　2010　IEEE.