[問題] 波德圖的波形
如題,圖長這樣
http://imgur.com/zGP9N

這是DD馬達跑出來的波形,目前這是穩定狀態
但無論是穩定或不穩定,高頻部份的phase都會劇烈變動
用了兩家的DD馬達都一樣,請問是為什麼??
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