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【多选题】
自控系统对两相感应伺服电动机的基本要求包括:A.
伺服电动机的转速能随着控制电压的变化在宽广的范围内连续调节。
B.
整个运行范围内的机械特性应接近线性,以保证伺服电动机运行的稳定性,并有利于提高控制系统的动态精度。
C.
无“自转”现象。即当控制电压为零时,伺服电动机应立即停转。
D.
伺服电动机的机电时间常数要小,动态响应要快。为此,要求伺服电动机的堵转转矩大,转动惯量小。
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A.
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B.
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C.
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D.
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A.
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B.
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C.
The author did not sign his name to the poem.
D.
It is one of several epics from the first century.
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