6ES7 232-0HB22-0XA8
6ES7 232-0HB22-0XA8
6ES7 232-0HB22-0XA8
6ES7 232-0HB22-0XA8
鍋爐風(fēng)機(jī)的風(fēng)量裕度通常都比較大,如果采用風(fēng)門控制,風(fēng)門擋風(fēng)板的平均開度一般在50%左右,大量能源浪費(fèi)在克服擋風(fēng)板阻力上,風(fēng)機(jī)效率下降。同時(shí)還會(huì)帶來管網(wǎng)壓力不穩(wěn)定,難以精確控制,以及電機(jī)啟動(dòng)電流過大造成的對電機(jī)的損耗和電網(wǎng)沖擊等其他問題。
2、液力耦合器控制
液力偶合器是一種耗能型的機(jī)械調(diào)速裝置,調(diào)速越深(轉(zhuǎn)速越低)損耗越大,特別是恒轉(zhuǎn)矩負(fù)載,由于輸入功率不變,功率損耗將隨轉(zhuǎn)速損失成比例增大。對于風(fēng)機(jī)、泵類負(fù)載,由于負(fù)載轉(zhuǎn)矩按轉(zhuǎn)速平方率變化,則輸入功率則按轉(zhuǎn)速的平方率降低,損耗功率相對小一些,但輸出功率是按轉(zhuǎn)速的立方率減小,調(diào)速效率仍然很低。液力耦合器的平均調(diào)速效率在50%左右。
3、變頻調(diào)速
變頻調(diào)速是靠調(diào)節(jié)風(fēng)機(jī)電動(dòng)機(jī)轉(zhuǎn)速來改變風(fēng)機(jī)風(fēng)量。按流體機(jī)械定律,風(fēng)機(jī)軸功率P與轉(zhuǎn)速n之間的關(guān)系如下所示:
Advanced Energy PDW 2200 RF Power Supply 6011-001-A全球熱賣,低價(jià)甩賣.
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4 used AE Advanced Energy HFV 8000 RF Generator 全球熱賣,低價(jià)甩賣.
ADVANCED ENERGY / AMAT HFV 8000 5kW RF Generator 全球熱賣,低價(jià)甩賣.
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1110-00056 APPLIED MATERIALS RF MATCH全球熱賣,低價(jià)甩賣.
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1110-00056 APPLIED MATERIALS RF MATCH全球熱賣,低價(jià)甩賣.
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Returns: Accepted within 14 days全球熱賣,低價(jià)甩賣.
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Advanced Energy PDW 600 RF Generator全球熱賣,低價(jià)甩賣.
AE Advanced Energy PDX 900-2V RF Generator 3156024-031B全球熱賣,低價(jià)甩賣.