作者：梁妍¹, 马爱霞¹, 郭腾达²

作者单位：1. 郑州工商学院工学院，河南 郑州 451400;
2. 光力科技股份有限公司，河南 郑州 450001

关键词：单端正激变换;远距离;无线传感器;电源;自供电;稳压处理

摘要：

针对远距离无线传感器网络内节点电源供能不稳定的问题，研究基于单端正激变换的远距离无线传感器网络电源自供电技术。根据Buck变换拓展产生具有稳压功能的单端正激变换器，基于功率管反向峰值电压上限值设计变换器内的功率变压器；根据电感系数和初级电感量确定变换器的钳位电容容量；利用脉冲宽度调制(PWM)芯片调制一系列脉冲宽度，等效获得电源供电所需波形。太阳能能源通过单端正激变换器进行稳压处理后，分别进入不同供电端，通过单片机对不同供电端电压情况进行检测，确定合适的供电端为电源供电。实验结果显示，该技术可在输出电压稳定的基础上，完成40 W功率输出；在负载条件一致的状态下，输出功率较为稳定。

Self powered technology of long distance wireless sensor network power supply based on single ended forward transform
LIANG Yan¹, MA Aixia¹, GUO Tengda²
1. College of Technology, Zhengzhou Technology and Business University, Zhengzhou 451400, China;
2. GL TECH Co., Ltd., Zhengzhou 450001, China
Abstract: Aiming at the problem of unstable power supply of nodes in long-distance wireless sensor networks, the self power supply technology of long-distance wireless sensor networks based on single ended forward conversion is studied. According to the expansion of Buck converter, a single ended forward converter with voltage stabilizing function is generated, and the power transformer in the converter is designed based on the upper limit of reverse peak voltage of power transistor; the clamping capacitance of the converter is determined according to the inductance coefficient and primary inductance; a series of pulse widths are modulated by PWM chip, and the waveform required for power supply is obtained equivalently. After the solar energy is stabilized by the single ended forward converter, it enters into different power supply terminals respectively. The voltage of different power supply terminals is detected by the single chip microcomputer to determine the appropriate power supply terminal for power supply. The experimental results show that the technology can achieve 40 W power output on the basis of stable output voltage, and the output power is relatively stable under the same load conditions.
Keywords: single ended forward conversion;long distance;wireless sensor;power supply;self power supply;voltage stabilization processing
2022, 48(3):112-117  收稿日期: 2021-04-21;收到修改稿日期: 2021-07-06
基金项目: 河南省科学技术厅科技攻关项目（9412019Y515，202102110269）；河南省高等学校重点科研项目（19A510023）；2020年河南省新工科研究与实践项目（2020JGLX098）
作者简介: 梁妍（1985-），女，河南郑州市人，讲师，硕士，研究方向为检测技术与自动化控制、电气自动化
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