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Proceedings Paper

Buck-boost converter for simultaneous semi-active vibration control and energy harvesting for electromagnetic regenerative shock absorber
Author(s): Peng Li; Chongxiao Zhang; Junyoung Kim; Liangyao Yu; Lei Zuo
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Paper Abstract

Regenerative semi-active suspensions can capture the previously dissipated vibration energy and convert it to usable electrical energy for powering on-board electronic devices, while achieve both the better ride comfort and improved road handling performance at the same time when certain control is applied. To achieve this objective, the power electronics interface circuit connecting the energy harvester and the electrical loads, which can perform simultaneous vibration control and energy harvesting function is in need. This paper utilized a buck-boost converter for simultaneous semi-active vibration control and energy harvesting with electromagnetic regenerative shock absorber, which utilizes a rotational generator to converter the vibration energy to electricity. It has been found that when the circuit works in discontinuous current mode (DCM), the ratio between the input voltage and current is only related to the duty cycle of the switch pulse width modulation signal. Using this property, the buck-boost converter can be used to perform semi-active vibration control by controlling the load connected between the terminals of the generator in the electromagnetic shock absorber. While performing the vibration control, the circuit always draw current from the shock absorber and the suspension remain dissipative, and the shock absorber takes no additional energy to perform the vibration control. The working principle and dynamics of the circuit has been analyzed and simulations were performed to validate the concept.

Paper Details

Date Published: 1 April 2014
PDF: 8 pages
Proc. SPIE 9057, Active and Passive Smart Structures and Integrated Systems 2014, 90570K (1 April 2014); doi: 10.1117/12.2045143
Show Author Affiliations
Peng Li, Stony Brook Univ. (United States)
Chongxiao Zhang, Stony Brook Univ. (United States)
Junyoung Kim, Stony Brook Univ. (United States)
Liangyao Yu, Stony Brook Univ. (United States)
Tsinghua Univ. (China)
Lei Zuo, Stony Brook Univ. (United States)

Published in SPIE Proceedings Vol. 9057:
Active and Passive Smart Structures and Integrated Systems 2014
Wei-Hsin Liao, Editor(s)

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