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汽车点火线圈的宽频电路模型及参数提取

, PP. 178-184

Keywords: 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

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Abstract:

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。

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