点火线圈是汽车的一个重要部件,它的性能好坏直接影响着汽车的运行,因此设计一个高性能,低成本的点火线圈始终是点火线圈设计人员的目标。本文主要推导点火线圈次级电压公式,并讨论其物理意义。点火线圈初、次级向绕在一个铁芯上,犹如自耦变压器的联接形式(见图1),初级接有 Ignition coil is an important part of the car, its performance is directly related to the performance of the car, so the design of a high-performance, low-cost ignition coil is always ignition coil designers goal. This article mainly derives the ignition coil secondary voltage formula and discusses its physical significance. Ignition coil primary, secondary to a core in the winding, like the coupling of autotransformer (see Figure 1), the primary access