IC693MDL931RR/IC693MDL931LT

IC693MDL931RR/IC693MDL931LT

IC693MDL931RR/IC693MDL931LT变频器标量控制方法

　　变频器的标量控制方法是利用电机等效电路模型，通过调整电机的电压、电流和频率等参数，实现对电机的转速控制，以间接实现对电机转矩的控制。

　　标量控制方法可以分为定频率控制和变频率控制两种：

　　1. 定频率控制方式：也称为正弦波控制方式，其控制方法是将直流电源通过一个振荡器变成交流电，然后再过滤成正弦波交流电，电压的频率和幅度都是定值，实现固定频率和变化幅度的定周期波形控制。

　　2. 变频率控制方式：也称为PWM控制方式。其控制方法是利用电子器件进行高频开关，将直流电压高频开关成若干个等面积的脉冲，经过滤波得到等效的正弦波交流输出。因为变频控制方式可以实现对电机电压和频率的控制，所以可实现的转速控制。

IC693MDL931RR/IC693MDL931LT  

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