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目前的汽车拖拉机电路，都配套安装有直流发电机，当发电机在额定功率下正常工作时，温度一般应在 50℃以下，因此用手去接触发电机外壳不会有烫手的感觉。若烫手则表明发电机工作不正常，应检修排除，常见原因是： 输出电流过大，使发电机超载；激磁线圈或电枢线圈匝间短
The current automobile tractor circuit, are equipped with a DC generator, when the generator is working at rated power, the temperature should generally be below 50 ℃, so the hand to touch the generator shell will not have the feeling of hot. If the hot hand indicates that the generator is not working properly, should be troubleshooting, common reasons are: the output current is too large, so that the generator overload; excitation coil or armature coil interturn short