[问答题]简述交流调压电路与交流调功电路在控制方式上的区别。

参考答案：交流调压电路在输入交流电源的每一个周期内都需要对两个晶闸管进行控制(施加触发脉冲),通过改变晶闸管的控制角α来调节输出电压;交流调功电路是在控制周期(M个电源周期)中的前N个电源周期内控制晶闸管导通(通常α=900),而后面的M-N个电源周期内不施加触发脉冲使晶闸管截止,通过控制M和N的比值来调节电路的输出功率。

相关题目:

boot的意思是:help or e
eloquent的意思是:fluen
A campu emergency
A cabinet or pace
A cabinet or pace

相关内容

● 1_____education i the intruction that occur when the intructor and tudent are eparated by ditance or time,or both
● 女孩，9个月，腹泻1天，呕吐1次，大便每天6次，每次量多，尿量稍减少，精神稍萎靡。体检：前囟及眼眶稍凹陷，心律齐、心音有力，双肺呼吸音清晰，皮肤弹性好，四肢温暖。给予ORS补液，下列有关ORS补液不正确的为（）
● CASE OF DEATH OR SERIOUS INJURY TO A PERSON IN AN ACCIDENT OR SHIPPING DISASTER i（）.
● Mainly eat 3 or 4 partly cloudy to overcat occaional rain（）lowly outh moderate or good.
● （）any cae or upected cae of quarantinable dieae，or any cae of eruptive dieae or any death be dicovered，the local quarantine officer mut be notified immediately．
● Should any cae or upected cae of quarantinable dieae，or any cae of eruptive dieae or any death be dicovered，the local Quarantine Officer mut be（）immediately.
● Damage to cargo caued by fume or vapor from liquid,gae, or olid i known a（）.
● Mater are（）olely reponible for all damage or accident of whatever kind reulting from the navigating or handling of their veel by day or by night.
● If he i a common carrier，he i abolutely reponible to the owner of the good carried （）any lo or damage to them unle caued by an Act of God or the Queen’ enemie，or the inherent vice in the good themelve，or the negligence of the owner of the good，or a general average acrifice.
● 系统中雷达状态包括Unknown、Operational（or ON）、Failed（or OFF）、Detached。
● Owner are to be reponible for lo of or damage to the good or delay in delivery of the good only in cae the lo，damage or delay ha been caued by the improper or negligent towage of the good．Thi mean that（）.
● The carrier i liable for lo of or damage to the good or delay in delivery caued by fire，（）the claimant prove that the fire aroe from fault or neglect on the part of the carrier，hi ervant or agent.