汽车点火线圈的宽频电路模型及参数提取  

Wideband Equivalent Circuit Model and Parameter Computation of Ignition Coil for Automobile Application

作　　者：俞集辉[1] 贾晋[1] 汪泉弟[1] 郑亚利[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030

出　　处：《电工技术学报》2011年第8期178-184,共7页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(50877081);重庆市自然科学基金(CSTC2006BA6015)资助项目

摘　　要：点火线圈在实际点火过程中为一瞬态电压变压器,为了能预测其宽频特性,文中将点火线圈绕组等效为多段独立线饼,并以此建立基于集总参数的电路模型。通过有限元法与数据拟合方法,确定各线饼间的电容以及每一线饼内的绕组匝间等效电容;对于线圈电感,利用有限元法分析了频率对电感值的影响,得到低频段内与高频段内的电感值。最后,仿真计算了点火线圈的频域阻抗特性以及时域瞬态电压响应,并分别与测试结果做对比,验证电路模型与参数计算方法的正确性与可行性。Ignition coil acts as a transient voltage transformer in spark process.For predicting the wideband characteristic of ignition coil,a lumped circuit model is proposed.This model separates the winding into identical sections that simulate winding impedance quality.The parameter capacity between sections and winding-wingding capacity in each section are derived from finite element method computation plus curve fitting scheme.By means of finite element method,the parameter inductance which changes as fenquency varying is classified to high frequency inductance and low Frequence inductance.Through contrasting the measured and calculated results in frequency and time domain,reliability and feasibility of the presented method in this paper is verified.

关 键 词：点火线圈 瞬态电压变压器 宽频特性 集总参数电路模型 有限元 数据拟合方法 

分 类 号：TM503.4[电气工程—电器]