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Energies 2013, 6(2), 921-933; doi:10.3390/en6020921

System Identification and Integration Design of an Air/Electric Motor

*  and
Department of Mechanical Engineering, National Central University, 300 Jhong-Da Road, Chong-Li 32001, Taiwan
* Author to whom correspondence should be addressed.
Received: 5 December 2012 / Revised: 4 February 2013 / Accepted: 5 February 2013 / Published: 8 February 2013
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This paper presents an integration design and implementation of an air motor and a DC servo motor which utilizes a magnetic powder brake to integrate these two motors together. The dynamic model of the air/electric hybrid system will be derived and eventually leads to successful ECE-40 driving cycle tests with a FPGA-based speed controller. The testing results obtained by using the proposed experimental platform indicate that the total air consumption is about 256 L under air motor mode and the electric charge consumption is about 530 coulombs under DC servo motor mode. In a hybrid mode, the current reduction of the battery is about 18.5%, and then the service life of the battery can be improved. Furthermore, a prototype is built with a proportional-integral (PI) speed controller based on a field-programmable gate array (FPGA) in order to facilitate the entire analysis of the velocity switch experiment. Through the modular methodology of FPGA, the hybrid power platform can successfully operate under ECE-40 driving cycle with the PI speed controller. The experimental data shows that the chattering ranges of the air motor within ±1 km/h and ±0.2 km/h under DC servo motor drive. Therefore, the PI speed controller based on FPGA is successfully actualized.
Keywords: air motor; DC servo motor; hybrid system; field programmable gate array air motor; DC servo motor; hybrid system; field programmable gate array
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Hwang, Y.-R.; Huang, S.-Y. System Identification and Integration Design of an Air/Electric Motor. Energies 2013, 6, 921-933.

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