Numerical Simulation on Electromagnetic Energy Harvester Oscillated by Speed Ripple of AC Motors

Abstract

The suppression of torque ripples in an interior permanent magnet synchronous motor (IPMSM) is essential to improve its efficiency and responsiveness. Here, we report on the development of an electromagnetic energy harvester incorporated into an IPMSM to suppress its torque ripples. The proposed harvester is driven to oscillations by the speed ripple of the AC motor. We derived the motion and circuit equations for the motor and the harvester according to Euler–Lagrange equations. We discussed the principle of electrical power generation and used MATLAB/Simulink numerical simulations to investigate the dynamic behavior of the proposed harvester. Our findings revealed that the active Coriolis force unnecessarily reduces the motor’s original torque, leading to unsuccessful power generation. Nevertheless, our results demonstrated that the reactive Coriolis force successfully suppresses the motor torque ripple.

Improvement of the Airflow Energy Harvester Based on the New Diamagnetic Levitation Structure

“…The collection of energy from the environment and its conversion into electrical energy for use in electronic devices has been the subject of much research to meet the power requirements of these devices [ 6 ]. Energy harvesting technologies involve conversion mechanisms such as electromagnetic [ 7 , 8 ], triboelectric [ 9 , 10 ], electrostatic [ 11 , 12 ], magnetostrictive [ 13 , 14 ], thermoelectric [ 15 , 16 ], piezoelectric [ 17 , 18 ] and photovoltaic [ 19 , 20 ]. Energy harvesters typically use one or more conversion mechanisms to convert energy from nature: tides, vibrations, air currents, heat, etc., into electrical energy.…”