; · I' 'fRlJ1\JG TAM· STJP�-·rv11\Y.H1\N INVERTER A ,_ � ' ;"l1, TAI-LIEU' A ' , •a; r.,,,".· · · · BUA CHUA MAY HAN sU',ouNG CONG NGHE• INVERTER MOFET � IGBT - Cd \ A ' A • ��! • •1 ,, 'rHANG 10-2017 1' ' · · · \ \ ; PHAN I : MAY HAN DI¥N TU HAN QUE, TIG; CUT PLASMA CH�Y MOSFET NGUYEN LY CO BAN -Mayhan di�n tu sir d1;mg cong ngh� inverter Cong ngh� inverter sir d1=1ng cong sudt d8 diSu chinh dong t�i ngo ra, khac hoan toah so v6i cong ngh� SU d1=1ng bi8n ap (Su d1=1ng trgc ti8p t�i CUQn thu cdp CUa bi8n ap) ' ' -Thanh phfrn cua mayhan bao g6m: -Phfrn ngu6n tu 220VAC t�o di�n ap 31 OVDC, duqc cung cdp cho dan cong su&t Mosfet, clan nayduqc dong ma ph1=1 thun, cdp nguf>n cho IRF va cdp nguf>n cho 7812 va 7805 -Di�n ap 12 Vol dugc su dvng cho m�cl diSu khiSn vii t�o xuµg :· i -Di�n ap Vol cfip cho chiSt ap -Di�n ap 5vol dugc cdp dS nuoi man hinh led hiSn: thi dong Page 1.1 Mach tao • 310VDC JU.: ff-�1-1ik� ;!,1V �.:.V:-:.tlJ\:'M.' XI '.!20V/50Hl i>I )NM!H IV!, r >I-= i-,:, tN,:t'.f)-1 c� •,.-., + UX5 !i ll);i C;-!5l1!2\'., [ M�ch nguyen ly ngu6n 310VAC Dien ap 220 VAC; V6i mfch ngu6n sfr d\mg ciu diot: ·1 chan 220"' se di tr\Jc tiSp vao chan xoay chiSu, chan l�i se di qu� nhanh Ptc ho�c Ntc ds· cftp vao chan xoay chiSu l�i cua m�ch c§.u V6i mfch ngu6n sir d\lng diot ciu: chan 220"' se di tr\JC ti6p vao chan xoay chiSu cua diot c§.u, chan cori l�i se di qua nhanh ptc ho�c ntc dS cftp cho chan xoay chiSu cua diot c§.u l�i - Sau 220 xoay chiSu duqc cdp vao diot cdu, se t�o duqc di�n ap chiSu (Xem l�i (mg · dvng cua diot du), di�n ap chiSu duqc l9c qua tv ngu6n t�o ph�ng d� t�o di�n ap 31 0VDC Sau d6 se c6 m�ch ngu6n ti r 31 0VDC t�o 24VDC dS cftp cho role ngu6n dS d6�g tr\Jc tiSp chan 220 VAC (nhanh vira di qua ptc ho�c ntc) dS tri (ptc ho�c ntc chi mo thai diSm d§.u sau ddn di�n qua n6 se n6ng len va ng�t khong cho di�n di qua va da duqc tri b�ng tiSp dism cua role ngubn) .9 Page cAu E>IOT NGUON 24VDC NGUON 310VDC TV NGUON 470uF/400V Bo ngu6n may han que Ma vit Caoap 2.5s/5s Bo ngu6n may tig/que Page9 Truong hQ'p tai bi ch�p (Nhanh IRF) Chung ta thao IRF va l�i tung -NSu cac chan 11 va 14 d�t' ma xung t�i IRF ma khong d�t' c�n ki8m tra ngu6n cdp di qua di�n tro om -Sau xung t�i IRF di�n ap da chudn (15Vac ho�c 7Vac) chung ta kiSm tra t�i cac nhanh cua bo chia xung 15:15 Page 89 C1 5819 102/1001/ Ntraill1A 2.2R 2.2R , R2 R4 10R 10R R7 R5 10R 10R R6 C4 03 Transformer 15!15 Y -M�ch bao gf>m: BiSn ap 15:15, diot ch6ng nhi6u 1N591�, di�n trc SRl v� 20R +Di6t: Khongnen thax thS lo�i kh�c ' ' ma chi dung 1N5819 ' l +Di�n tr&SR va 20R c6 thS thaythS b.ing cac c�p di�n tr& �ac nhu (2R2,10R); (4R7,15R); (6R8,18R) Page90 tDo di�n ap t�i nhanhA1A2; B1B2;-�1C2;.D1D2 gia tri sat :15Vac ho�c 7Vac (Thang 50Vac, que·do f§.n hrqt vao c�c nhanh) "(Nguai hQC Ccln thay thS chucln gia tri t�i bo chia xung 15:15 va di�n ap t�i cac nhanh chucln Tranh truang hqp ch�p va vao chan khac) Page 91 IV.Phinl\fC Sod6: OUTi '.· · Gi /\l' ·IL.•.·· 40NSQ Iv ···.C33 H5!4 1i£ :l � • ¥iiNS0• · t : C: 'Jf· , 75.J4CiOV VJ "·" ·� (!J.t; _ 4'.?l.21