摘要
针对充电机或负载设备对测量电路的干扰问题,提出一种基于正弦波脉宽调制(SPWM)的变频点微电流电池阻抗无损测量方法。先给出铅酸电池的阻抗模型;再根据干扰的特征,提出抑制方法;最后通过自适应变频点算法,测得铅酸电池的内阻。基于SPWM变频点的铅酸电池阻抗测量方法,重复测量的精度达到20μΩ,提高了测量精度与测量重复性。
To solve the charger or load interference problem on measuring circuit, the non-destructive method of impedance based on sine wave pulse width modulation（SPWM） was proposed. Firstly ,the impedance model of lead-acid battery was introduced, then the interference rejection methods were proposed by the characteristics of interference. Finally ,the measurement result of the internal resistance of lead-acid battery was achieved by the adaptive frequency conversion algorithm. The precision and repeatability of impedance measurement were improved, the precision was up to 20 μΩ.
作者
李孟东
鲜秀明
李阳
童国道
LI Meng-dong;XIAN Xiu-ming;LI Yang;TONG Guo-dao(Neijiang Power Company, State Grid Sichuan Electric Power Company, Neijiang, Sichuan 641000, China;Sichuan Huaneng Baoxing River Hydropower Limited Liability Company, Yaan ,Sichuan 625000, China;Nanfing Dingte Technology Co. ,Ltd. , Nanjing , Jiangsu 210036, China)
出处
《电池》
CAS
CSCD
北大核心
2018年第3期185-187,共3页
Battery Bimonthly
关键词
正弦波脉宽调制(SPWM)
变频点
无损激励
阻抗
sine wave pulse width modulation （SPWM）
frequency conversion
nondestructive excitation
impedance
