KichTuDocLap (9).pdf

# KichTuDocLap (9).pdf - Đồ án điện tử công suất...

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Đồ án đ i n t công su t 8 - T c độ không t i lý t ưở ng : dm U = onst k c ϖ = φ - Độ c ng c a đặ c tính c ơ : u f k = =variable R + R M Δ φ β = − Δϖ R f = 0 ta có đặ c tính c ơ t nhiên R f càng l n thì β càng nh d n t i đặ c tính c ơ càng d c Nh ư v y khi thay đổ i đ i n tr ph ta đượ c 1 h đặ c tính c ơ nh ư hìng v . ng v i m t ph t i Mc nào đ ó , n ế u R f càng l n thì t c độ càng gi m cho nên ng ườ i ta s d ng Ph ươ ng pháp này để h n ch ế dòng đ i n và đ i u ch nh t c độ Đặ c đ i n : - T c độ n b ng ph
• Spring '16
• Stephanie Moore

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