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ti: B bin tn trc tip mt phaNhm DT9-K54:Trn Vn Huy20091262DT-VT 09 K54Dng Vn Ho20093433DT-VT 09 K54L Hng Trung20093648DT-VT 09 K54Ni dung trnh byGii thiu bin tn Bin tn trc tip Bin tn trc tip mt phaNguyn l lm vicM phngBin tnBin tn c 2 loi:Bin tn gin tip: c mch trung gian mt chiu, trc tin chuyn i t xoay chiu v mt chiu ri chuyn i li t 1 chiu v xoay chiu u ra vi tn s theo munBin tn trc tip: khng c mch trung gian mt chiu, chuyn i trc tip t xoay chiu thnh xoay chiu da vo nguyn l ng ct dng inBin tn trc tipBin i tn s u vo f1 thnh tn s ra f2 ti u ra bng cch ng-ct dng xoay chiu tn s f1Tn s ra f2 < f1S tng qut bin tn trc tip

C 2 loi: mt pha v ba pha

u-nhc im bin tn trc tip so vi bin tn gin tipu im: C th trao i nng lng vi li in lin tc Tn hao cng sut t hn so vi bin tn gin tip do khng phi qua khu trung gian mt chiuNhc im iu khin phc tp hn so vi bin tn gin tip do phi iu khin ng-ct dng in H s cng sut thp do lm vic trn nguyn l iu khin phaHnh nh bin tn trc tipHnh nh bin tn trc tip ca hng Siemens

Bin tn trc tip mt phaS nguyn l

Nguyn l lm vic2 pha in th pha1 v pha2 lch nhau 180 .2 thyristor Q1 v Q2 hot ng nh 2 cng tc ct in th ca 2 pha to thnh bn k dng ca in th hnh sin mong mun ( cung cp cho ti).2 thyristor Q3 v Q4 s to bn k m ca in th mong mun.Thay i gc m ca cc Thyristor cho ph hp in th ra trn ti c gi tr trung bnh thay i theo quy lut hnh sin mong mun.Nguyn l lm vic

M phngS mch:Kt qu:

M phngThm cun cm vo ti: