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Energies 2016, 9(2), 103; doi:10.3390/en9020103

Maximum Power Point Tracking and Harmonic Reducing Control Method for Generator-Based Exercise Equipment

1
Department of Electrical Engineering, National Chin-Yi University of Technology, No.57, Section 2, Chung-Shan Road, Taiping District, Taichung City 41170, Taiwan
2
Department of Industrial Engineering & Management, National Chin-Yi University of Technology, No.57, Section 2, Chung-Shan Road, Taiping District, Taichung City 41170, Taiwan
*
Author to whom correspondence should be addressed.
Received: 11 November 2015 / Revised: 11 January 2016 / Accepted: 2 February 2016 / Published: 11 February 2016
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Abstract

This study uses a sliding mode control (SMC) in a generator-based exercise equipment (GBEE) with nonlinear P-V characteristic curves. A P-V characteristics curve can be influenced by varying the pedaling speed of the generator. The traditional maximum power point tracking (MPPT) control method is used with perturb and observe algorithms (P&O), extremum seeking control (ESC), etc. However, these control methods are not robust enough for control. SMC is created by two pattern methods for robustness control, approaching and sliding conditions. However, SMC allows infinite high-frequency switching of the sign function. If the sign function is used to switch the converter, it will cause the converter and switch life to be cut short, and also to form high frequency noise. Therefore, this study proposes an extension theory for an intelligent control method that will effectively improve conversion efficiency and responsiveness. This study compares generator input current waveforms for fast Fourier transform (FFT) for three different control methods. Finally, using simulation validates the stability and FFT analysis with power simulation (PSIM) software. The results of upgrading overall efficiency are about a 5% increase in efficiency and a faster response speed of about 0.5 s. The amount of generator input current harmonic is greatly reduced. View Full-Text
Keywords: maximum power point tracking (MPPT); sliding mode control (SMC); extension theory maximum power point tracking (MPPT); sliding mode control (SMC); extension theory
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wang, M.-H.; Huang, M.-L.; Jiang, W.-J. Maximum Power Point Tracking and Harmonic Reducing Control Method for Generator-Based Exercise Equipment. Energies 2016, 9, 103.

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