6ES7390-1BC00-0AA0推薦選擇鎖存型或接近鎖存特性(有對稱特性)的開關(guān)型霍爾集成電路。鎖存型霍爾集成電路在直流無刷電機(jī)交替變化轉(zhuǎn)子磁場下,其輸出波形占空比接近于1:1,符合直流無刷電機(jī)對位置傳感器信號的要求。如果采用普通的開關(guān)型霍爾集成電路作位置傳感器,在S極和N極下的輸出不對稱,可能會影響到電機(jī)的效率,并引起附加的轉(zhuǎn)矩波動。
6ES7390-1BC00-0AA0選擇較高溫度等級的霍爾集成電路。特別是霍爾芯片直接安放在主定子上情況,當(dāng)電機(jī)短時(shí)過載時(shí),電機(jī)的繞組及繞組附近的局部溫度可能達(dá)到110~130℃以上,此時(shí),霍爾電路有可能不能可靠工作,甚至發(fā)生不可逆的損壞。此時(shí),選擇工作溫度150℃的霍爾集成電路是必要的。
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