西門子6SL3224-0BE25-5UA0

西門子6SL3224-0BE25-5UA0，西門子G120 功率模塊 PM240，價格優勢 現貨銷售

6SL3224-0BE25-5UA0 SINAMICS G120 功率模塊 PM240，不帶濾波器，內置制動變頻器 3AC,380-480V +10/-10% 47-63Hz,額定輸出功率，重載功率： 5.5 KW，用于 200% 3S,150% 57S,100% 240S，環境溫度 -10 至 +50 ℃, 額定輸出功率，輕載功率： 7.5KW, 用于 150% 3S,110% 57S，100% 240S

西門子6SL3224-0BE25-5UA0，西門子6SL3224-0BE25-5UA0價格報價/現貨銷售/原裝正品/全國直銷西門子6SL3224-0BE25-5UA0

產品介紹

1、什么是西門子變頻器？

西門子變頻器是利用電力半導體器件的通斷作用將工頻電源變換為另一頻率的電能控制裝置。

2、為什么西門子變頻器的電壓與電流成比例的改變？

異步電動機的轉矩是電機的磁通與轉子內流過電流之間相互作用而產生的，在額定頻率下，如果電壓一定而只降低頻率，那么磁通就過大，磁回路飽和，嚴重時將燒毀 電機。因此，頻率與電壓要成比例地改變，即改變頻率的同時控制西門子變頻器輸出電壓，使電動機的磁通保持一定，避免弱磁和磁飽和現象的產生。這種控制方式多用于 風機、泵類節能型西門子變頻器。

3、西門子變頻器制動的有關問題

制動的概念：指電能從電機側流到西門子變頻器側（或供電電源側），這時電機的轉速高于同步轉速，負載的能量分為動能和勢能。 動能（由速度和重量確定其大小）隨著物體的運動而累積。當動能減為零時，該事物就處在停止狀態。機械抱閘裝置的方法是用制動裝置把物體動能轉換為摩擦和能消耗掉。對于西門子變頻器，如果輸出頻率降低，電機轉速將跟隨頻率同樣降低。這時會產生制動過程。 由制動產生的功率將返回到西門子變頻器側。這些功率可以用電阻發熱消耗。在用于提升類負載，在下降時， 能量（勢能）也要返回到西門子變頻器（或電源）側，進行制動。這種操作方法被稱作“再生制動”，而該方法可應用于西門子變頻器制動。在減速期間，產生的功率如果不通過熱消耗的方法消耗掉，而是把能量返回送到西門子變頻器電源側的方法叫做“功率返回再生方法”。在實際中，這種應用需要“能量回饋單元”選件。

4、采用西門子變頻器運轉時，電機的起動電流、起動轉矩怎樣？

采用西門子變頻器運轉，隨著電機的加速相應提高頻率和電壓，起動電流被限制在150%額定電流以下（根據機種不同，為125%~200%）。用工頻電源直接起動 時，起動電流為6~7倍，因此，將產生機械電氣上的沖擊。采用西門子變頻器傳動可以平滑地起動（起動時間變長）。起動電流為額定電流的1.2~1.5倍，起動轉 矩為70%~120%額定轉矩；對于帶有轉矩自動增強功能的西門子變頻器，起動轉矩為100%以上，可以帶全負載起動。

5、裝設西門子變頻器時安裝方向是否有限制。

西門子變頻器內部和背面的結構考慮了冷卻效果的，上下的關系對通風也是重要的，因此，對于單元型在盤內、掛在墻上的都取縱向位，盡可能垂直安裝。

6、不采用軟起動，將電機直接投入到某固定頻率的西門子變頻器時是否可以？

在很低的頻率下是可以的，但如果給定頻率高則同工頻電源直接起動的條件相近。將流過大的起動電流（6~7倍額定電流），由于西門子變頻器切斷過電流，電機不能起動。

 西門子6SL3224-0BE25-5UA0，西門子6SL3224-0BE25-5UA0價格報價/現貨銷售/原裝正品/全國直銷西門子6SL3224-0BE25-5UA0

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