Abstract
In this work on the basis of the obtained integral relations, including integral equations, taking into account the influence of magnetic screens from a nonlinear magnetic on the inductance of multilayer coils in dependence of the current strength, the frequency and nonlinear properties of inductances of noise suppression radio reactors of electric transport are obtained. The radio reactors properties behavior in the circuit under nonstationary effects is studied.
Highlights
The electric vehicle electrical equipment operation is characterized by various transient processes in high-power consumers of electric energy, such as floating contact of current collector and contact network, switching of electric motor windings, switching on / off of climatic equipment, as well as operation of power switches in modern inverter drives [1]
All these processes are characterized by powerful current and voltage surges occurring during their course in electric circuits extended along the length, and, as a consequence, significant electromagnetic interference in a wide frequency range, which requires the development of special procedures to suppress them
To significantly reduce the dimensional specifications and weight of noise suppression reactors (NSR), it seems advisable to use magnetic screens made of ferromagnetic materials, which allows the inductance value increasing at low frequencies and low currents by several tens or more times [2]
Summary
The electric vehicle electrical equipment operation is characterized by various transient processes in high-power consumers of electric energy, such as floating contact of current collector and contact network, switching of electric motor windings, switching on / off of climatic equipment, as well as operation of power switches in modern inverter drives [1]. The present work is devoted to the development of a mathematical model for calculating the influence of these factors on the inductance of a multilayer coil with magnetic screens In the case of magnetic screens, it is necessary to solve integro-differential equations of magnetostatics They can be formulated with respect to the field H or with respect to the vector-potential A [5]. This allows to adjuste consistently , using (5), calculate the inductance and to determine its relationship with the current (Fig. 2). Substitution of the IDE solution in this equation for a given current and taking into account the connection of the magnetic permeability with the field makes it possible to find the connection of the nonlinear inductance and current. If a time-varying process is considered, the current value in the circuit changes, and for the different point in time the algorithm should be applied again
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