To Calculation of Dynamic Characteristics of High-Speed Electromagnets of Traction Automatic Switches

Abstract

The problems of numerical simulation of electromagnetic processes in high-speed electromagnetic drives of traction circuit breakers based on the method of spatial integral equations are considered. It is established that the proposed numerical model and algorithm for calculating the three-dimensional magnetic field by the method of spatial integral equations with subsequent determination of the integral characteristics and parameters of the electromagnetic drive allow to obtain sufficiently complete and reliable information about the static and dynamic modes of operation of the device. The possibility of regulation of static and dynamic setpoints on the current of the circuit breaker by changing the parameters of the armature start-up and actuation of the drive electromagnet by using the effects of saturation of steel, eddy currents in the solid elements of magnetic systems and short-circuited sleeves is shown. Currents and time of moving the armature of the electromagnet in static and dynamic modes are determined by the geometric dimensions of the magnetic system, the presence of solid elements of the magnetic circuit, short-circuited sleeves, their location on the elements of the magnetic system. The adequacy.