DIAGNOSTIC METHOD OF TECHNICAL STATE OF POWER-DRIVEN EQUIPMENT Russian patent published in 2015 - IPC G01R31/34 

FIELD: measurement equipment.

SUBSTANCE: invention relates to methods for determination of a technical state of an object, mainly power-driven equipment, and can be used to control power-driven valves, pumps, ventilation equipment of nuclear power stations and actuators of the control and protection system (CPS) for VVER-440. Essence of the invention: during operation of the electric motor a consumed current signal is measured and a power amplitude current spectrum is formed. Difference between measured and reference spectra is determined by the following formula: , where and - amplitudes of measured and reference spectra respectively; i, n - numbers of discrete components in analysed sections of the spectrum. The obtained value is compared to initial values and state of equipment is determined as "properly functioning and serviceable", or "improperly functioning and serviceable" or "partially serviceable". As a reference current spectrum, spectra are used, which are obtained as a result of simulation of "properly functioning and serviceable", or "improperly functioning and serviceable" or "partially serviceable" state of the power-driven equipment. Based on minimum difference between measured and reference spectra, state of the equipment is determined as "properly functioning and serviceable", or "improperly functioning and serviceable" or "partially serviceable".

EFFECT: possibility of complex registration of all components of the spectrum.

2 cl, 2 dwg