Superspeed permanent magnet synchronous motor stator inductance online identification method

The invention discloses a superspeed permanent magnet synchronous motor stator inductance on-line identification method comprising the following steps: obtaining phase currents ia and ib of a motor, and carrying out Clark transformation to obtain stator currents i alpha and i beta under a two-phase static coordinate system; acquiring sample point information according to the stator current ialpha and ibeta under the two-phase static coordinate system and the voltage instructions ualpha and ubeta under the two-phase static coordinate system; carrying out sample preprocessing to obtain an identification sample point; and performing stator inductance online parameter identification to obtain a stator inductance value. The invention also discloses a superspeed permanent magnet synchronous motor stator inductance on-line identification system. The method is designed on the basis of an inductance parameter equation which does not contain rotor position information, the whole identification process does not need the