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Abstract <p>Linear generators, used, among other things, as autonomous power sources and electromechanical shock absorbers, convert the energy of oscillations into electrical energy with a linear reciprocating motion of the inductor. The EMF of the generator has a nonsinusoidal shape due to higher spatial and temporal harmonics. The change in the speed of the inductor is determined by the nature of the acting forces, but in the analysis it is usually assumed to be harmonic with a sinusoidal distribution of magnetic induction. Reduction of EMF harmonics is possible in an electrical system containing a linear generator and a magnetic-fluid damper, due to the improvement of designs based on a refined analysis. Reduction of spatial harmonics of EMF is carried out by improving the tooth zone and the armature winding, using magnetic fluid, and reducing temporal harmonics due to the provision of the electrical system of the necessary change in the linear speed of the inductor. The analysis was performed in the ANSYS Electronics Desktop, ANSYS MAXWELL, and Elcut packages. An electrical engineering system for converting oscillation energy based on a linear generator and a magnetic-fluid damper was developed, its functions, features, and operating modes were described. Combined device designs, a three-phase combined winding with an EMF increased by 2% and a sinusoidal distortion coefficient reduced by 20% were developed. Mathematical analytical and numerical methods for calculating characteristics based on finite-element modeling were proposed. The developed electrical-engineering system allows for efficient redistribution of oscillation energy between a linear generator and a magnetic-fluid damper, and ensures a reduction in higher harmonics in the EMF. The use of magnetic fluid controlled by a magnetic field allows regulating the resistance force to the inductor movement, carrying out controlled viscous energy dissipation in the layers of the fluid, dampening oscillations, increasing the magnetic conductivity of the gap, to increase the magnetic flux, reducing the pulsations of the tooth harmonics of magnetic induction, increasing heat removal from magnets and windings, and providing effective lubrication.</p>

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An Electrical System for Converting Vibration Energy Based on the Combined Operation of a Linear Generator and a Magnetic-Fluid Damper

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • Yu. B. Kazakov,
  • I. S. Egorov

摘要

Abstract

Linear generators, used, among other things, as autonomous power sources and electromechanical shock absorbers, convert the energy of oscillations into electrical energy with a linear reciprocating motion of the inductor. The EMF of the generator has a nonsinusoidal shape due to higher spatial and temporal harmonics. The change in the speed of the inductor is determined by the nature of the acting forces, but in the analysis it is usually assumed to be harmonic with a sinusoidal distribution of magnetic induction. Reduction of EMF harmonics is possible in an electrical system containing a linear generator and a magnetic-fluid damper, due to the improvement of designs based on a refined analysis. Reduction of spatial harmonics of EMF is carried out by improving the tooth zone and the armature winding, using magnetic fluid, and reducing temporal harmonics due to the provision of the electrical system of the necessary change in the linear speed of the inductor. The analysis was performed in the ANSYS Electronics Desktop, ANSYS MAXWELL, and Elcut packages. An electrical engineering system for converting oscillation energy based on a linear generator and a magnetic-fluid damper was developed, its functions, features, and operating modes were described. Combined device designs, a three-phase combined winding with an EMF increased by 2% and a sinusoidal distortion coefficient reduced by 20% were developed. Mathematical analytical and numerical methods for calculating characteristics based on finite-element modeling were proposed. The developed electrical-engineering system allows for efficient redistribution of oscillation energy between a linear generator and a magnetic-fluid damper, and ensures a reduction in higher harmonics in the EMF. The use of magnetic fluid controlled by a magnetic field allows regulating the resistance force to the inductor movement, carrying out controlled viscous energy dissipation in the layers of the fluid, dampening oscillations, increasing the magnetic conductivity of the gap, to increase the magnetic flux, reducing the pulsations of the tooth harmonics of magnetic induction, increasing heat removal from magnets and windings, and providing effective lubrication.