With　the　extensive　application　of　permanent　magnet　synchronous　motor　in　the　new　energy　vehicle　industry,　the　requirements　of　manufacturers　for　motor　speed　control　and　torque　response　performance　are　also　more　stringent.　However,　the　inductance　parameters　of　the　motor　will　change　in　real　time　as　the　current　changes,　which　will　affect　the　responsiveness　and　stability　of　the　control.　Based　on　the　simplest　PI　regulator,　this　paper　presents　a　method　to　identify　the　parameters　of　permanent　magnet　synchronous　motor　(PMSM)　and　uses　this　parameter　to　improve　the　regulator.　©　Published　under　licence　by　IOP　Publishing　Ltd.