三相桥式整流电路控制角α的起算点,如α=30°,在对应的线电压波...
Thursday, September 15, 2022
Thursday, September 15, 2022
在晶闸管两端并联的RC回路是用来防止()损坏晶闸管的。...
Wednesday, September 14, 2022
门极关断晶闸管(GTO)与普通晶闸管相似,但结构上把阴极宽度减薄...
Thursday, September 15, 2022
在反电动势负载时,只有()的瞬间值大于负载的电动势,整流桥路中的...
Thursday, September 15, 2022
与单级压气机相比,多级压气机特性曲线上的喘振边界与堵塞边界之间区...
Thursday, September 15, 2022
Friday, September 16, 2022
Monday, September 12, 2022
Friday, September 16, 2022
在单相全控桥整流电路带反电势负载时,若交流电源有效值为U2,反电...
Thursday, September 15, 2022
变压器能否变换直流电压?为什么?若不慎将一台额定电压为110/3...
Thursday, September 15, 2022
在其他条件不变的情况下,余速利用系数增加,汽轮机的()应效率增大...
Thursday, September 15, 2022
发电机定子绕组匝间短路时,将出现()向负序电压,并产生相应的负序...
Wednesday, September 14, 2022
Monday, September 12, 2022
一台Y/△连接的三相变压器,原边加对称正弦额定电压,作空载运行。...
Friday, September 16, 2022
Sunday, September 11, 2022
Friday, September 16, 2022
Friday, September 16, 2022
双层绕组是指定子上每个槽有两个圈边,每个圈边为()A、一层B、两层C、三层D、四层...
Monday, July 3, 2023
Thursday, September 15, 2022