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- The major high frequency EMI source of the power converter is the changes of high voltage and current (dv/dt and di/dt) during the switching instant associated with the devices. 開(kāi)關(guān)器件在開(kāi)通和關(guān)斷暫態(tài)過(guò)程產(chǎn)生的高電壓和電流變化(dv/dt和di/dt)是高頻電磁干擾的主要來(lái)源。
- The switch oversteptrip incidents of two substations are described and the causes of its misoperation are analyzed. One is the mismatching of line overcurrent time(1 s) and switch instant trip time(0.7 s). 說(shuō)明了2座變電站開(kāi)關(guān)越級跳閘的事故情況;分析了西門(mén)子7SJ600裝置在天津電網(wǎng)運行中2次拒動(dòng)的原因:1次是線(xiàn)路的過(guò)電流時(shí)間(1s)與開(kāi)關(guān)速斷保護時(shí)間(0.;7s)不配合;造成相應開(kāi)關(guān)跳閘;
- I groped for the light switch in the dark room. 我在黑暗的房間里摸索著(zhù)找電燈開(kāi)關(guān)。
- The dynamic processes of the HVDC converter is analyzed under the condition of the asymmetric AC system, involving the variation of switching instants and unbalanced commutation overlaps. 分析在交流系統不對稱(chēng)情況下，換流閥導通時(shí)刻偏移和三相換相角不平衡的HVDC換流器動(dòng)態(tài)特性。
- Just for an instant I think he would go to refuse. 我腦中有一閃念，以為他要拒絕了。
- I don't like to drink instant coffee. 我不喜歡喝速溶咖啡。
- She finished her work in an instant. 她沒(méi)有多久就完成了她的工作。
- She make a cup of instant coffee. 她沖了一杯速溶咖啡。
- His glance rested an instant on my face. 他盯著(zhù)我的臉看了一會(huì )兒。
- Help came not an instant too soon. 援助來(lái)得正是時(shí)候。
- Come here this instant! ie at once! 馬上到這里來(lái)！
- I grope for the light switch in the dark room. 我在黑洞洞的屋里摸索著(zhù)尋找電燈開(kāi)關(guān)。
- Not for an instant did I believe he had lied. 我絲毫也不相信他撒過(guò)謊。
- Tell me the instant they arrive. 告訴我他們到的時(shí)間
- The flood victims were in instant need of help. 水災難民急需救助。
- The switch on the kettle won't stay down. 這個(gè)水壺上的開(kāi)關(guān)按下時(shí)卡不住了。
- He often eats out at an instant Chinese restaurant. 他常在一家中式快餐館吃飯。
- He rested his eyes on the new comer for an instant. 他瞧了一下那個(gè)新來(lái)的人。
- I switch off when he starts talking about cars. 他一談起汽車(chē)我就厭煩。
- I took an instant dislike to him. 我一見(jiàn)他就不喜歡。
