Abstract
This paper investigates an energy-harvesting system that uses of vibration energy at a shock absorber for electric vehicles. This system mainly comprises a linear electromagnetic generator and synchronous buck converter. To obtain the electrical energy through a linear electromagnetic generator, the perturb and observe maximum power point tracking (P&O MPPT) scheme is applied at the converter. The power converter circuit is designed with a diode rectifier and synchronous buck converter. The generated electric power is able to transmit to the battery and the damping force of the shock absorber is adjusted by the controlled current of generator. The linear electromagnetic generator was designed as a single phase eight-slot eight-pole tubular permanent magnet machine. The performance of the proposed energy-harvesting system was verified through simulations and experiments.
Highlights
Automobiles have been used for a long time as transportation and this has led to environmental problems caused by their exhaust gases and fuel consumption [1]
Conventional shock absorbers have been used to absorb shocks from road surfaces while driving and convert this vibration energy to the heat energy in the suspension. If these shock absorbers were changed to an energy harvesting system, the produced vibration energy could be used as another electrical energy source for assisting the generator capacity of a vehicle or charging a secondary battery [6,7]
The generated electric power is able to transmit to the battery and the damping force of the shock absorber is adjusted by the controlled current of generator which is defined by an adequate perturb and observe maximum power point tracking (P&O Maximum power point tracking (MPPT)) control scheme
Summary
Automobiles have been used for a long time as transportation and this has led to environmental problems caused by their exhaust gases and fuel consumption [1]. If these shock absorbers were changed to an energy harvesting system, the produced vibration energy could be used as another electrical energy source for assisting the generator capacity of a vehicle or charging a secondary battery [6,7] It has a high power density and is not restricted by the space used [8]. Most studies primarily focus on rotary electromagnetic shock absorber converter for anconverter energy-harvesting system with the func and rarely mention power system This paperrough focuses on vibration the design of a linear electromagnetic generator and a power irregular conditions. Since the damping force of the designed shock absorber generally operates in the low-frequency range of approximately 10 Hz, this MPPT control scheme can achieve generated power control of the generator and absorb the vibration of the electric vehicle without the need of expensive position sensors. Since the damping force of the designed shock absorber frequency range of approximately 10 Hz, this MPPT contro power control of the generator and absorb the vibration of need expensive position sensors
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