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汽车电源系统主要由蓄电池、交流发电机、调节器等组成。在正常情况下,对于12V电源系统,在发动机不工作时蓄电池两极柱间电压为12V左右;在发动机中速运转时,则应为13.5～14.5V之间,即为调节器电压值。发动机中速运转时,蓄电池正极柱与交流发电机B+接线柱之间电压降应不大于0.7V;交流发电机外壳与蓄电池负极柱之间电压降应不大于0.05V调节器搭铁端与交流发电机外壳之间电压降应不大于0.05V。若不符合上述要求,就相当于在充电回路中串接了电阻,会使交流发电机输出电流减少,
Automotive power system consists of batteries, alternators, regulators and other components. Under normal circumstances, for the 12V power system, when the engine is not working, the voltage between the two poles of the battery is about 12V; when the engine is running at medium speed, it should be between 13.5 and 14.5V, which is the voltage value of the regulator. When the engine is operating at medium speed, the voltage drop between the positive terminal of the battery and the B + terminal of the alternator should not exceed 0.7V; the voltage drop between the alternator shell and the negative terminal of the battery should not exceed 0.05V. The voltage drop between the generator housings should not exceed 0.05V. If you do not meet the above requirements, it is equivalent to the resistance in series in the charging circuit, will reduce the output current of the alternator,