推荐回答(1个)
请问是哪种交通工具的?
如果是汽车的,则参考如下 :
汽车启动系统在汽车上是一个很重要的部分,而启动系统电路图是掌握启动系统的一个基础,下面从易到难来 介绍启动系统的电路图。
启动系统的组成部分有蓄电池一电源、启动机一动力部分、控制装置。
一、启动机中直流电动机的电路图 直流电动机的工作原理是电磁感应。给电动机输入电流,电动机向外输出转矩,从而启动发动机,其线路 图如图 1 所示。
二、启动机 只有个电动机无法做到启动小齿轮和发动机飞轮平稳进入啮合和脱离啮合的, 甚至没有办法去启动发动机, 所以在直流电动机的基础上增加了一个电磁开关,线路图如图 2。
启动开关闭合后,可移动铁芯在保持和吸拉两个线圈的共同作用下向左移动,带动拨叉使驱动小齿轮向右 移动:同时,直流电动机的定子和转子线圈内流经的是小电流,输出转矩小,使驱动小齿轮和飞轮平稳啮 合。当铁芯移动到最左侧时,铁芯左端的金属盘同时接触电源接线柱和电动机主接线柱,短路吸拉线圈, 电流直接由电源接线柱流到电动机主接线柱,增强了启动时的点火能量和直流电动机的输出转矩,使发动 机容易启动。
三、增加了启动继电器的电路图 启动开关直接和电磁开关连接,流经的是大电流。当 开关断开时,易产生火花,损害开夭,所以增设了启 动继电器,用小电流控制大电流,线路如图 3 所示。
说明:附加电阻接线柱是启动时短路点火系统中的附加电阻,目的是为了增强启动时的点火能量。
原理:小电流经过启动开关、启动继电器中的线圈控制经触电到启动机的大电流,从而保护启动开关。
四、增设了启动复合继电器的电路图
为了防止驾驶员在启动结束后没有及时断开启动开关,通过保护继电器自动断开线路,线路图如图 4 所示。工作原理:当发动机启动后,发电机中性点输出电压,使保护继电器中的线圈流过电流,产生磁场,使 K2 断开,故启动继电器中的线圈形成断路,使 K1 断开,从而断开启动机中的电流。在启动开关没有断开的 情况下,保护启动机。
以上是启动机中最常用的电路图,掌握了此电路图,为实际的线路连接和启动系统的故障诊断打下一个基 础。
请搜索汽车启动系统电路图
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