Moshhinskij J.A., Sokolova E.M., Shumov K.V. Linear Generator with Permanent Magnets in the Electric Shock Absorber Circuit

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Abstract

The problems of creating linear generators with permanent magnets of reciprocating motion are considered. The use of high-energy permanent magnets makes the prospects for their development very real, when creating electric shock absorbers, which are an alternative version of hydraulic shock absorbers widely used in the automotive industry. In the electric shock absorber, the kinetic energy of the oscillating suspension element is converted to electric one. This energy can be used to power various car devices. It is shown that when choosing a shock absorber design, the design with a short external inductor is preferable, in the grooves of which there is a three-phase winding of the generator. The secondary element has radially magnetized permanent magnets based on rare-earth materials. Due to the relative linear displacement of the primary with the winding and the secondary with permanent magnets, an alternating voltage is induced in the winding, which is rectified by a three-phase rectifier and is supplied to the battery. It is of interest to estimate which part of the vibrational energy is converted into electric one, the electromagnetic force, its peak values, the time of the transient process, the number of oscillations. A mathematical model of an electric shock absorber is presented in the MATLAB / Simulink package, which allows one to investigate transient processes under various laws of perturbation force variation. The results of the study of the driving force, current, speed and displacement from time are given. Studies have shown that to improve the performance of the shock absorber, it is necessary to connect in parallel the accumulator an additional resistance, the value of which is determined for each specific case. The proposed mathematical model can be used in algorithms for controlling microprocessors of suspension systems for cars and other vehicles.

Keywords

Electric shock absorber, linear generator, permanent magnets, Simulink-model.

Jurij A. Moshhinskij

Ph.D. (Eng.), Associate Professor, Department of Electromechanics, Electrical and Electronic Devices, Moscow Power Engineering Institute (National Research University). E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID: https://orcid.org/0000-0002-9292-2728

Elena M. Sokolova

Ph.D. (Eng.), Associate Professor, Department of Electromechanics, Electrical and Electronic Devices, Moscow Power Engineering Institute (National Research University). E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID: https://orcid.org/0000-0002-2470-9570

Kirill V. Shumov

Postgraduate student, Department of Electromechanics, Electrical and Electronic Devices, Moscow Power Engineering Institute (National Research University). E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID: https://orcid.org/0000-0002-0811-1659

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