基于剩磁原理的微功耗脉冲励磁方法研究.docVIP

文章编号：1510059 基于剩磁原理的微功耗脉冲励磁方法研究 Research on the Magnetizing Method with Sharp Pulses and Micro-Power Consumption Based on Magnetic Remanence 李泽松1,2,3， 左富强1，王欣欣1，姚灵1 （宁波水表股份有限公司1，浙江宁波 315033； 宁波市计量测试研究院2，浙江宁波 315048； 浙江大学控制科学与工程学院3，浙江 杭州 310027) Li Zesong1,2,3, Zuo Fuqiang1, Wang Xinxin1, Yao Ling1 (1. Ninngbo Water Meter Co., LTD, Ningbo 315033, China; 2. Ningbo Institute of Measurement and Testing, Ningbo 315048, China ; College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China) 摘要：针对目前恒流源励磁方法功耗过大而无法满足电磁水表微功耗要求的问题，提出基于剩磁原理的微功耗脉冲励磁方法。通过对电磁流量传感器磁场的工作方式分析，选择具有高剩磁、低矫顽力的矩磁材料制作磁路，采用双向窄脉冲电压为励磁线圈供电，使磁场发生反转并稳定。根据这一原理，设计了脉冲励磁磁路和双向脉冲发生电路，并进行了试验测试。测试结果表明，相对恒流励磁方法，基于剩磁原理的脉冲励磁方法可以将励磁功耗大大降低，并且得到稳定的工作磁场，有利于提高电磁水表的使用寿命和流量信号的稳定性。 关键词：电磁水表； 微功耗；脉冲励磁；剩磁；矩磁材料；矫顽力 中图分类号：TH814 文献标志码：A Abstract: To solve the power consumption problem in electromagnetic water meters, a new micro-power consumption magnetizing method was proposed based on magnetic romance by using sharp pulses, comparing to the traditional constant-current magnetizing method. The operating magnetic field of the electromagnetic flow sensor was explored, and the rectangular hysteresis material was selected to fabricate magnetic circuits because of its characters of high remanence and low coercive force. Therefore, the magnetic direction can be switched and stable by bidirectional sharp voltage pulses. According to this method, the magnetic circuit and electric circuit were established to be tested. It was demonstrated by the test results that power consumption of this method was reduced enormously comparing to the constant-current method. Moreover, the magnetic field was more stable so that the lifetime of the electromagnetic water meter and its signal’s stability can be enhanced. Key Words：Electromagnetic water meter; Micro-power consumption; Voltage pulse magnetizing; Remanence；Rectangular hysteresis material；Coercive force 0 引言 电磁水表作为一种功能强大的智能水表，相对于传统机械式水表具有测量精度高、响应速度快、压力损失小等