To address the issue of inverter dead-time causing non-sinusoidal distortions in both the fundamental and harmonic spaces of five-phase permanent magnet synchronous machine,which subsequently lead to reduced accuracy in parameter identification,this paper presents a dual-space dead-time compensation method.Confronting the challenge of traditional invasive methods displaying high sensitivity to system disturbances,this paper fully considers the factors influencing parameters and introduces a new distribution identification method based on cross-and self-saturation effects.First,the d-axis bias current injection method is employed to obtain online identification results of the dq-axis inductance under all operating conditions.Then,a fourth-order equation is employed to fit the inductance results.Finally,the online identification of stator resistance and rotor flux linkage is used in conjunction with the fitting equation.The validity of the methods proposed is verified through experimental results using a five-phase interior permanent magnet synchronous machine prototype.
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