FIELD: engine devices and pumps.
SUBSTANCE: method involves finding an instantaneous value of a phase current of a valve induction motor power converter for calculating the root-mean-square deviation from σ a detailed coefficient as a characteristic fault index and analysis of the root-mean-square deviation curve σ of the detailed coefficient of the phase current of the valve induction motor power converter over the entire range of rotation rate or over the entire range of torque for detecting a fault in the form of a short circuit of the main switch of the valve induction motor power converter.
EFFECT: accurate detection of fault in short-circuit form.
3 dwg
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