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| Analysis on Impedance Matching of Thermoacoustic Electric Generation System for the Maximum Acoustic-to-Electric Efficiency |
| He Xin1, 2, Xia Jiakuan1, Su Hao1, Li Wenrui1, Zhang Jian1 |
1.School of Electrical Engineering Shenyang University of Technology Shenyang 110870 China;
2.School of Mathematics and System Science Shenyang Normal University Shenyang 110034 China |
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Abstract In order to improve the acoustic-to-electric efficiency for thermoacoustic electric generation system (TAEGS), an acoustic impedance matching design on permanent magnet linear generator (PMLG) is proposed. Based on the similarity theory, analysis and calculations are carried out to study the spring mechanical and load impedance, combining with acoustic impedance current source mechanism. The method obtains the maximum acoustic-to-electric efficiency with the constraints to improve capturing acoustic power for PMLG. Furthermore, the threshold law of external capacitance is achieved for PMLG acting as acoustic impedance, acoustic capacitive and acoustic inductive load on thermoacoustic engine, under the acoustic impedance matching of the spring mechanical impedance and capacitance reactance. Finally, the experimental platform is built. The results show that the effectiveness of the proposed acoustic impedance matching design, providing the theoretical and technical basis for TAEGS design.
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Received: 20 January 2016
Published: 12 May 2017
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2017, Vol. 32 
