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「行業趨勢」從領先到主流,汽車散熱配件——無刷風扇

發布日期:2022-11-11 點擊:28

核心技術| 無刷電機

汽車發動機散熱在很多年一直采用的是有刷風扇,通過有刷電機驅動扇葉快速轉動,從而給散熱器散熱。無刷風扇最初僅僅是博世、博澤這樣國際型大企業能夠提供,屬于領先型技術,但是近幾年無刷風扇已經開始在國內盛行,成為非常受到追捧和認可的技術產品。


為什么選擇無刷風扇

無刷風扇的核心是無刷電機,相比傳統的有刷電機,無刷電機因體積小、效率高、壽命長的特點更具優勢。

體積小

從設計和銅線選用上優化,提高槽滿率,加強散熱,提升電機效率,減少電機體積。以一款功率為200W風扇的有刷電機與無刷電機進行對比,外徑不變情況下,電機高度從88.2mm降低到68.5mm,對于整車空間布局更具有友好性。而現在開發的400W無刷電機最薄可以做到63mm。

效率高

電機是整個機電系統中耗電量最大的部分,所以對于它的工作效率的提升就顯得更為重要。單電機來講,有刷的效率在65%左右,而我們400W無刷電機的效率可達85%,電機效率相比提升了20%。

壽命長

無刷風扇電機,省去了碳刷與換向器的摩擦,電機僅軸承有磨損,壽命大幅提升,綜合工況電機壽命可達3萬小時,約是有刷電機壽命的3倍。備注:非霍爾傳感器測量,而是采用反電動勢法檢側位置的。


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