电机、电器、仪表的额定数据,即额定电压、额定电流、额定功率,通常理解为该产品计算过的和表征运行时正常工作状态的数值。但在产品运行时,电压、电流、负载和功率却总是受到相当大的变动。 在专用设备中,其中包括在汽车电气设备系统中工作制参数的交变特性表现得更明 The rated data of motor, appliance and instrument, namely rated voltage, rated current and rated power, are usually understood as the values ​​calculated and characterized by the product during normal operation. However, the voltage, current, load, and power are always subject to considerable changes as the product is running. In specialized equipment, including the automotive electrical equipment system, the alternation characteristics of the work system parameters are more obvious