A16B-1100-0180

接口的工作模式 以太網卡可以工作在兩種模式下：半雙工和全雙工。 半雙工：半雙工傳輸模式實現以太網載波監聽多路訪問沖突檢測。傳統 的共享LAN是在半雙工下工作的，在同一時間只能傳輸單一方向的數據。當兩個方向的數據同時傳輸時，就會產生沖突，這會降低以太網的效率。 全雙工：全雙工傳輸是采用點對點連接，這種安排沒有沖突，因為它們 使用雙絞線中兩個獨立的線路，這等于沒有安裝新的介質就提高了帶寬 。例如在上例的車站間又加了一條并行的鐵軌，同時可有兩列火車雙向 通行。在全雙工模式下，沖突檢測電路不可用，因此每個全雙工連接只 用一個端口，用于點對點連接。標準以太網的傳輸效率可達到50%～60% 的帶寬，全雙工在兩個方向上都提供100%的效率。

A16B-1100-0180

聯系人：郭先生
聯系電話：18971415643《優先》
座機：027-83238871
傳真：207-61537051
QQ：810334512《優先》

A16B-1100-0180

對電機的要求 1、從最低速到最高速電機都能平穩運轉，轉矩波動要小，尤其在低速 如0.1r/min或更低速時，仍有平穩的速度而無爬行現象。 2、電機應具有大的較長時間的過載能力，以滿足低速大轉矩的要求。 一般直流伺服電機要求在數分鐘內過載4～6倍而不損壞。 3、為了滿足快速響應的要求，電機應有較小的轉動慣量和大的堵轉轉 矩，并具有盡可能小的時間常數和啟動電壓。 4、電機應能承受頻繁啟、制動和反轉。

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