中国组织工程研究 ›› 2011, Vol. 15 ›› Issue (39): 7347-7350.doi: 10.3969/j.issn.1673-8225.2011.39.032

• 数字化骨科 digital orthopedics • 上一篇    下一篇

便携式医用正弦波逆变电源的设计

赵  强,崔  畅   

  1. 辽宁石油化工大学信息与控制工程学院,辽宁省抚顺市 113001
  • 收稿日期:2011-06-07 修回日期:2011-07-05 出版日期:2011-09-24
  • 作者简介:赵强★,男,1978年生,辽宁省抚顺市人,2006年内蒙古工业大学毕业,硕士,讲师,主要从事电子信息技术研究。 lnshzq@126.com

Design of a portable medical sine-wave inverter

Zhao Qiang, Cui Chang   

  1. Department of Information and Control Engineering, Liaoning Shihua University, Fushun  113001, Liaoning Province, China
  • Received:2011-06-07 Revised:2011-07-05 Online:2011-09-24
  • About author:Zhao Qiang★, Master, Lecturer, Department of Information and Control Engineering, Liaoning Shihua University, Fushun 113001, Liaoning Province, China lnshzq@126.com

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220 V/50 Hz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。

关键词: 医疗设备, 便携式, 脉冲宽度调制, 推挽电路, 单相逆变桥

Abstract:

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.

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