RESEARCH ON WORK OF A STEPPER MOTOR OF ELECTRICITY METERS UNDER THE INFLUENCE OF AN EXTERNAL PERMANENT MAGNETIC FIELD CREATED WITH THE PURPOSE OF UNCOUNTED CONSUMPTION OF ELECTRIC ENERGY
Abstract
Research on facts and circumstances of electrical energy uncounted consumption in the practice of conducting electrical engineering forensic examination is one of the most common. Study of the influence of a permanent magnetic field on operation of the electromechanical electricity meters is one of the areas of electrical engineering research, where scientific and practical analysis is absent in electrical engineering forensic examination. The tasks solved by electrical engineering forensic examination of electricity meters subjected to interference in their work due to the influence of an external permanent magnetic field are still being solved indirectly, mainly by examining the state of indicators of the effect of a magnetic field.
The Article purpose is to determine the mechanism of interference in the operation of a stepper motor of electromechanical electricity meters of energy accounting meters under the influence of an external magnetic field artificially developed to disregard the consumption of electric power.
The article examines the structure of a stepper motor of electronic-mechanical devices metering electric power. A research model of a stepper motor is built. The analysis of distribution of force magnetic lines in the magnetic system and in the magnetic shield of a stepper motor as a result of influence of an external magnetic field artificially created for the purpose of uncounted consumption of electric power in the absence of such an effect on the basis of modeling with the use of software and a mathematical apparatus: the finite element method. The mechanism of interference in the regular operation of a stepper motor of electricity meter is determined when approaching the metering device of an external permanent magnet with a high value of maximum specific energy in order to consume electric power negligently.
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