X-ES XCALIBUR1000 POWERPC 750FX/GX COMPACTPCI SINGLE CPU WITH 2- SO-DIMM SLOTS
觸器得電吸合,其常開觸點咖閉合并自鎖,主觸點閉合,電機得電運轉。若人8中任意相斷電。則45端截止關斷。接觸器伽失電。其
常開觸點3和主觸點3斷開,屯機停止運轉。起到保護作用。5中,若人8,嗾,#,聰縷鴝,磁コ82,半導體斷相保護器輸出端45端閉合

,相當于個自鎖開關。當發生斷相時,45端斷開,交流接觸器你斷電,從而保護了電機。右為的值取從到的自然數。把直線段連接起來
,得折線44它的解析式為步進電機的實現速度曲線3若步進電機按2的速度曲線運動,取其中單調遞增的段曲線研究。3.設進給脈沖的時
刻分別為在時間間隔,=,內力迸屯機的平均速及步和,作頻韋,脈沖8分別為步進電機在時間間隔內的真實速度不僅難以測量,而且用
解析式不也非常困難。因此,用它在乃折線之⑴為步進電機理想速度曲線⑴的條實現速度曲線。點。的橫坐標值稱為這條實現速度曲線
的定時時刻。2,既不是條近似的曲線,更不是條虛構的曲線,它是條真實的曲線。由實變函數論可知,的實現曲線有無數條,它們所構
成的集合的勢和連續統的勢等。典甩的3期間的平均速度描述它的速度,式2是它的平均速度的砧解析式。設步進電機給定的速度曲線為
,在時間區間。,加內非負,稱步進電機的理想速度曲線。
條實現曲線可分別描述為芯實觀曲線和曲線⑴的交點是立線段瓜的端點稱之為⑴的左端點實現速度曲線,4;若實現曲線和曲線,的
交點心。線段的端點則稱之為,的過如點作面積為的矩形她沁簡稱單位矩形,并且要求直線段。如和曲線相交。
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