When induction motor is fed with variable converter,the harmonic components soared in stator current,and the diagnosis of stator inter-turn short circuit fault is different from the case of direct power network.Furthermore,both the unbalanced supply voltage sources and the inherent asymmetries in the motor will affect diagnosis.To solve the above problems,the reference signals are constructed by modulated frequency,and the fundamental component of modulated frequency in the stator current can be obtained ac...
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