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总览 评价 叶蔚生 , 文玉梅 * , 李 平 , 孙长河 ( 重庆大学,光电工程学院,传感器与仪器研究中心,重庆市 400044; ) 摘要: 本文提出了一种双芯电线自供电电流传感器的磁芯结构,通过磁芯的非对称结构设计,使双芯电线周围的磁场分布重新得到分配,形
叶蔚生, 文玉梅*, 李 平, 孙长河
(
重庆大学,光电工程学院,传感器与仪器研究中心,重庆市 400044; )
摘要:
本文提出了一种双芯电线自供电电流传感器的磁芯结构,通过磁芯的非对称结构设计,使双芯电线周围的磁场分布重新得到分配,形成具有不同磁通的磁回路,低通量支路用于传感,较高通量支路用于能量采集。使用本种磁芯的自供电传感器在应用于双芯电线情况时输出的采能功率得到提升,采集到的能量经电源管理电路管理和存储后,传感器无需外部电源或电池供电即可维持正常运作。实验表明使用该磁芯的传感器能够自供电实现对双芯电线1A以上电流的传感。
关键词:
电流传感;能量采集;自供电;无线传感;霍尔元件
YE Weisheng, WEN Yumei*, LI Ping, SUN Changhe
(
Research Center of Sensors and Instruments, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China; )
Abstract:
This paper presents a magnetic core of self-powered current sensor applied for zip-cords which reassigns the distribution of the magnetic field around zip-cords by the unsymmetrical design of the magnetic core. Separate magnetic circuits are produced in the magnetic core: the circuit with less flux density is used for sensing and that with higher density for energy harvesting. When applied for zip-cords, the output power of the self-powered sensor with the magnetic core promotes and maintains the operation of the sensor without external power supply or battery by the power management circuit. The experiment results show that the sensor achieves self-powered current sensing for zip-cords under AC current larger than 1A.
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