Novel Power Management of Audio Beam System with Specific Corrugated Loudspeaker
Audio Beam System is a revolutionary way of projecting audio signal in a highly directional manner to listener. This paper focuses on the power management of Audio Beam System. A specific loudspeaker, which is fabricated by Polyvinylidene Fluoride (PVDF), is proposed according to the theory of corrugated structure for PVDF film. Based on the test and analysis results, a unique digital amplifier, Class D power amplifier is designed specially for the corrugated piezoelectric loudspeaker. It is composed of power MOSFETs, type IRFU2407, in a full H-Bridge configuration driven by HIPxxxxA circuits in bootstrap mode. A proper design of the peripheral circuits and the configuration of the parameters solve the problem induced by the capacitance of transducer around the resonant frequency, leading to a stable high-power driving ability to the load. Finally, the experiment with the corrugated loudspeaker driven by the Class D amplifier verifies that the amplifier designed maintains high efficiency output onto the load, which leads to the novel power management of the Audio Beam System with specific corrugated loudspeaker.
Liwei Yang Limei Xu Leon Xu Antti Salo
Institute of Astronautics and Aeronautics University of Electronic Science and Technology of China, Nokia Research Center, Beijing Economic and Technological Development Area, No.5 Dong Huan Zhonglu,
国际会议
2008 International Conference on Audio，Language and Image Processing(2008国际声音、语言、图像过程大会)
镇江
英文
40-44
2008-07-07（万方平台首次上网日期，不代表论文的发表时间）