出场人物:张老师:退休高工,对变频器的应用及推广颇有研究。小孙:蓝天公司电气工程师课堂风格:深入浅出。2逆变电路过了一个星期,小孙又到张老师家去了。“逆变电路预习过了?有问题吗?”张老师和蔼地问。“大体的轮廓,好象知道了。但要深究起来,却还是感到模模糊糊地。首先,对逆变用的IGBT管就不大熟悉。”小孙说。 Appearances: Zhang: retired senior engineer, the application and promotion of the drive quite a lot of research. Xiao-Sun: Blue Sky Electrical Engineer Classroom Style: simple. 2 inverter circuit after a week, Xiao Sun went to Zhang's home again. “Has the inverter been previewed? Is there a problem? ” Mr. Zhang kindly asked. “The outline of the general seems to know, but to get into the study, but still feel vague. First of all, on the IGBT inverter tube is not familiar with. ” Xiao Sun said.