MVME162PA-344E
MVME162PA-344E
MVME162PA-344E軟起動與傳統(tǒng)減壓起動方式的不同之處在哪里?
籠型電機(jī)傳統(tǒng)的減壓起動方式有Y-q 起動、自耦減壓起動、電抗器起動等。這些起動方式都屬于有級減壓起動,存在明顯缺點(diǎn),即起動過程中出現(xiàn)二次沖擊電流。軟起動與傳統(tǒng)減壓起動方式的不同之處是:
(1)無沖擊電流。軟起動器在起動電機(jī)時,通過逐漸增大晶閘管導(dǎo)通角,使電機(jī)起動電流從零線性上升至設(shè)定值。
橡膠擠出機(jī)系統(tǒng)的組成部分
臺擠出設(shè)備通常由主機(jī)、輔機(jī)及其控制系統(tǒng)組成。通常這些組成部分統(tǒng)稱為擠出組。
21 橡膠擠出機(jī)的主機(jī)
臺擠出機(jī)主機(jī)由擠壓、傳動、加熱冷卻三部分系統(tǒng)組成。
擠壓系統(tǒng)主要由螺桿和機(jī)桶組成,是擠出機(jī)的關(guān)鍵部分;
傳動系統(tǒng)中起作用是驅(qū)動螺桿,要保證螺桿在作過程中具備所需要的扭矩和轉(zhuǎn)速;
加熱冷卻系統(tǒng)主要來保證物料和擠壓系統(tǒng)在成型加中的溫度控制。
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