摘要
背景:目前市场上便携式医疗设备主要以锂电池供电为主,续航能力较弱,无法在野外长期工作。目的:为提高便携式医用设备供电电源的可靠性和续航能力,设计了高效、可靠、低成本的正弦波逆变器,详细阐述了设计方案,并制作了实验样机。方法:主电路由推挽升压变换器和单相逆变桥组成,采用高频变压器实现电压比调整和电气隔离,降低了噪声,提高了效率、减小了输出电压纹波。逆变器功率开关管采用了RCVD缓冲电路,确保逆变桥安全工作。控制部分采用集成脉宽调制芯片SG3524和正弦函数发生芯片ICL8038实现正弦波脉宽调制。结果与结论:实验样机体积减小到传统逆变器的1/4,效率达到86%,输出电压波形失真度小于5%,在复杂的工况下实现了220V/50Hz的市电输出。逆变器可以使用蓄电池作为电源,简单可靠、易于调试。
BACKGROUND：Currently,the medical device is toward smaller,portable development.Portable medical equipments are mainly powered by lithium batteries.Battery life is weak,unable to work in the wild.OBJECTIVE：In order to improve power reliability and endurance of portable medical devices,to design a high efficiency,credible and low cost sine-wave inverter.METHODS：High frequency inverter technology is selected.It contains high frequency transformer,which can fulfill voltage ratio regulation and electricity isolation,push-pull converter and single-phase bridge circuit as the main circuit,degrade noise,raise efficiency,reduce voltage ripple.Power switching tube adopts a RCVD cushion circuit to ensure safety working.Sine pulse width modulation as control form is selected by using integrated circuit SG3524 and ICL8038.RESULTS AND CONCLUSION：The experimental model machine reduces the volume to 1/4 of the traditional inverter,system efficiency reaches 86%.The experimental result indicates the distortion factor of the output voltage waveform is less than 5% and output is 220 V/50 Hz commercial power in complicated operating mode.The Inverter can be used as a power supply battery that is simple,credible,easy to debug.
出处
《中国组织工程研究与临床康复》
CAS
CSCD
北大核心
2011年第39期7347-7350,共4页
Journal of Clinical Rehabilitative Tissue Engineering Research
