?MMS3910/311-01模塊
充磁機根據電容儲能脈沖放電產生強大磁場,對鐵磁性物質進行磁化[1]。在電磁交換前,電容儲存的能量

式中uc為儲存電容的端電壓,c為儲存電容的容量。改變電容的電壓或容量,可調節電容存儲電場能量大小。目前,電容在2kv~3.5kvdc,存儲能量可達100kj以上。
電容c被充電至設定電壓u0時斷開充電電源,隨即接通lr串聯電路,則電容c所儲電荷通過lr迅速地以脈沖形式放電,得到極大的脈沖電流峰值。電容放電的端電壓uc滿足

式中l為充磁頭中螺線管的電感量,r為螺線管、放電回路連接導線電阻、接觸電阻及放電器件內阻的總和(忽略線路分布電容與分布電感)。
對脈沖充磁,充磁頭常選用
即欠阻尼情況下,電容放電電流,使脈沖磁場峰值達到磁化線圈內被充磁材料內矯頑力的3~5倍時進行可飽和磁化。
磁通強度檢測有磁電式磁通、電子式磁通和數字積分式磁通三種[2]。圖1為電子式磁通電路,有探測線圈和積分電路組成。當探測線圈中所鏈合的磁通變化δφ時,線圈中感應出電動勢,經積分后的輸出電壓
式中n為探測線圈的匝數,r為電阻,c為積分電容。
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