A20B-2900-0370

A20B-2900-0370

伺服油泵液壓系統簡圖為什么伺服油泵系統比變量泵（即使是閉環變量泵）系統更節省電力？1 伺服油泵的馬達效率高。2  伺服油泵在從保壓狀態到大排出量時能節省更多的電力。3 內控型變量泵必需在 14bar 左右時才能處于可控狀態，而伺服油泵則可以在 1bar 壓力下工作。其中，伺服馬達的性能對省電性能直接的影響。引入磁阻扭矩和含有稀士元素的永磁鐵技術會使伺服油泵的節電性能。

由于伺服油泵所輸出的壓力、流量可以閉環控制，所以它的壓力重復精度好，而且在低壓力下也可以可靠的工作。伺服油泵所輸出的流量是靠數字信號來控制的，有很好的線性和低速可控性，其流量的重復精度也較高。

另外，伺服油泵所產生的噪音也較變量泵低。

然而伺服油泵也有它的缺點。在變量泵系統中，在保壓時不會擔心電機的輸出扭矩不同，因為電機的功率沒有改變；伺服油泵在保壓時轉速減小，其輸出扭矩必然減小，所以，伺服油泵的伺服馬達必需是的、并且在低速時有較大扭矩輸出。另外，伺服油泵對電源的要求比較高，即使在變動幅 10% 以內，特別是在正側變動時，由于主機運轉條件、負荷條件，也會有超負荷報警的可能。負荷容積較大且在高壓維持狀態下，如果忽然斷電，可能會造成控制器的損壞。

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