trolly wire 中文意思是什麼
trolly wire
解釋
架空線-
Prf1, modular fixed surge arresters, used for trolly wire protection
架空進線保護: prf1系列用於通信系統保護的 -
Standard specification for figure - 9 deep - grooved and figure - 8 copper trolly wire for industrial haulage
工業運輸用9號深槽銅及8號銅制電車架空線的標準規范 -
We developed the power system of electric drill based on dc - ac. the system use the technique of spwm frequency cowersation control. it changed th d. c provided by trolly wire of d. c motor into stable a. c adopted igbt and driving circuit adopted high speed module of exb840
針對當前我國煤礦電鉆電源的使用現狀,提出研製dc - ac變換的電鉆電源系統,該電源系統直接利用spwm變頻控制技術,將井下直流電機車的架空線所提供的直流電轉變成頻率是50hz的1 . 27v的穩定交流電。
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