DongCoDien (19).pdf

# ? ng thái gi ớ i h ? n đ ó là tr ? ng thái

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ng thái gi i h n, đ ó là tr ng thái biên liên t c. - Đặ c tính c ơ c a h th ng Ch ế độ dòng đ i n liên t c Ph ươ ng trình đặ c tính c ơ : Thay đổ i góc đ i u khi n α = ( 0 - π ), đ i n áp c a ch nh l ư u bi ế n thiên t U do – ( - U do ) và ta đượ c h đặ c tính song song n m n a bên ph i c a h tr c t a độ {M, ω }. Nh ng đặ c tính đ ó không t n t i n a m t bên trái là do các van không cho dòng đ i n ph n ng đổ i chi u. Khi đ ó t c độ không t i lí t ưở ng tùy thu c vào góc đ i u khi n α độ c ng đặ c tính c ơ : ( ) CL dm R R k + Φ = ¦ 2 β là không đổ i. Các đườ ng đặ c tính c a h CL - Đ m m h ơ n các đặ c tính c ơ c a h F - Đ Ch ế độ dòng đ i n gián đ o n Ph ươ ng trình đặ c tính c ơ : M k k R R k U M k k R R k U e CL e do e CL e CL . . . . cos . . . . 2 2 Φ + Φ = Φ + Φ = μ μ α ω dm e do o k U Φ = . cos . α ω
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