Methods\ By using mercury as working medium, the flow of the single pump and the dual pump is measured under the same pressure head and the same height of the exit with the simulant direct current electromagnetic pump.
方法 通過在以水銀為傳輸介質(zhì)的模擬直流電磁泵上進(jìn)行實(shí)驗(yàn) ,分別測出在相同靜泵高 Δp和相同出液口高度 H 下 ,雙泵及單泵的流量大小 。
In order to avoid DC voltage pumping-up,a phase shift compensation approach is proposed,and the relationships among source overvoltage ratio,load power factor,phase shift angle and injection voltage provided by inverter are presented.
對一種串聯(lián)有源電壓質(zhì)量調(diào)節(jié)器運(yùn)行中直流側(cè)存在的電壓泵升現(xiàn)象進(jìn)行了分析,并對采用移相控制技術(shù)來抑制直流電壓泵升時(shí)電網(wǎng)過電壓倍數(shù)、負(fù)載功率因數(shù)、移相角及補(bǔ)償電壓大小之間的關(guān)系進(jìn)行了理論分析。
Then the investigation into the DC-link voltage pumping-up from the viewpoint of real power flow is conducted and a novel closed-loop phase shift control method based on the DC-link voltage is proposed.
首先對采用移相控制技術(shù)來抑制直流側(cè)電壓泵升時(shí)電網(wǎng)過電壓倍數(shù)、負(fù)載功率因數(shù)、移相角及補(bǔ)償電壓大小之間的關(guān)系進(jìn)行了簡要理論分析,然后從能量平衡角度對直流側(cè)電壓泵升現(xiàn)象進(jìn)行了討論,揭示了直流側(cè)電壓變化與逆變器能量流動的關(guān)系。