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变频调速技术是通过改变电动机的定子电压和频率实现对电动机转速的调整,它可分为间接变频和直接变频两类。间接变频装置是将工频交流电通过整流变成直流电,然后再经过逆变器将直流电变换成可控频率的
Frequency control technology is by changing the motor stator voltage and frequency to achieve the motor speed adjustment, which can be divided into indirect and direct frequency conversion two categories. Indirect frequency conversion device is through the rectifier AC power into DC, and then through the inverter DC will be converted to controllable frequency