DC galia tiekimas yra plačiai naudojamas - pramoninis laukas
Dizainas pagrindinis grandinė DC perjungimas maitinimas tiekimas
The main circuit of the DC switching power supply is used to complete the conversion of DC-AC-DC, and the main circuit of the system adopts a full bridge DC-DC converter, as shown in Figure 2. The power switching device used in this system is the IGBT module of the BSM 50GB120DN2 series, with each module having a half bridge structure. Todėl, in a full bridge system, two modules are required. Kiekvienas modulis yra įterptas su a greitas laisvas ratas diodas.
DC perjungimas galia tiekimas buvo plačiai naudota in daug pramoniniai laukai. In pramoninė gamyba (pvz. as suvirinimas, galvanizavimas, arba greitis reguliavimas iš DC varikliai), a didelis skaičius of įtampa reguliuojamas DC galia šaltiniai are reikalingi, ir jie paprastai reikalauti a DC galia tiekimas kad gali patogiai reguliuoti the voltage output. At dabartis, due to the privalumai of high efficiency and miniaturization of switching power supplies, traditional linear reguliated power supplies and thyristored reguliavo power supplies are gradually being replace by dc switching reguliavo power supplies. The main control method of switching power supply is to use a pulse width modulation integrated circuit to output PWM pulses, use an analog PID regulator for pulse width modulation. Šis kontrolė metodas turi tam tikras klaidas ir the circuit is santykinai kompleksas.
veiklos principas
The DC switching power supply consists of an input part, a power conversion part, an output part, an output part, and a control part. The power conversion part is the core of the switching power supply, which performs high-frequency chopping on unstable DC and completes the conversion function required for output. It most consists of a switching transistor and a high-frequency transformer. Paveikslas 1 rodo schema diagrama ir ekvivalentas schema diagrama iš a DC perjungimas galia šaltinis, kuris is komponuojama iš a pilna banga lygintuvas, perjungimas tranzistorius V, sužadinimas signalas, laisvasis ratas diodas Vp, energija saugykla induktorius, ir filtravimas kondensatorius C. In fact, the core part of a DC switching power supply is a DC transformatorius.
