برداشت انرژی الکتریکی از ارتعاشات خطوط راه‌آهن در اثر عبور قطار توسط برداشت‌کننده الکترومغناطیسی

In this research, an energy harvesting device from railway lines has been investigated. This device includes two mechanical and electrical parts. Its mechanical part is based on a ball screw mechanism and a mechanical movement rectifier, which includes two large bevel gears, one small bevel gear and two one-way bearings, which actually turns the reciprocating linear motion of the train rail caused by the train passing over the rail into a unidirectional rotary motion for the rotation of the generator axis. Its electrical part includes a three-phase alternating generator that receives its rotation from the output of the rectifier and the planetary gearbox. In writing the relevant equations, a rail with a length of 139.52 meters, which has 255 traverses along its length, is considered as an Euler-Bernoulli beam, and also a two-carriage train, each of which has four axles, is considered as a passing load. Due to the large dimensions of the obtained matrices and the differential equation machine, MATLAB software was used to form the matrices and also to solve the differential equation machine. Finally, the parameters in the problem have been changed and the results of these changes have been given on the amount of voltage, power and energy obtained. Observations indicate that the spring stiffness parameters of the used springs and the mass of the unit length of the rail do not affect the amount of energy harvested. By increasing the parameters of the transmission ratio of the gears, the train speed and the axial force of the train, the amount of harvested energy increases. By increasing the external resistance parameters of the consumer and the lead of the ball screw, the amount of harvested energy decreases.