正向平均电流

为了能够精确控制LED的正向平均电流，通过在峰值电流控制的基础上增加一个电流外环，我们提出了一种新的控制方法：I~2控制方法。

In order to control the average current of LED accurately , a new control method , called as I ~ 2 control technique , is proposed by added a new current outer loop into the PCM control technique .

可控硅的额定正向平均电流的有效值电压PRV应大于负载电流的有效值；

Virtual value of the frontage average currency of SCR ( PVR ) should be no less than the virtual value of the loading currency ;

结果表明：当正向脉冲平均电流密度为1.5A/dm2，占空比为20%，频率为250Hz时，所得的镍镀层的耐腐蚀性能最好。

The results indicated that the as-deposited nickel coating with the best corrosion resistance was synthesized by the optimized plating parameters : positive average pulse current density 1.5 A / dm2 , duty cycle 20 % and frequency 250 Hz .