Konsepsyon yon ekipman pou pouvwa switching pou yon sèl-faz ak twa-faz ekipman pou pouvwa
Seleksyon sikwi PWM
Atik la chwazi UC3846 doub pwodiksyon aktyèl tip PWM kontwolè IC. Sikwi sa a gen yon sik devwa *maksimòm* 50% nan yon frekans chanje nan 20KHZ, kidonk kontwòl li efikas ak ki estab.
IGBT kondwi ak pwoteksyon
IGBT work is controlled by the positive and negative gate voltage, when UGE>0, IGBT sou, lè UGE<0, (general UGS ≤ -5V), IGBT cut-off. Taking into account its characteristics and operating principle, the choice of positive and negative dual power supply M57962L-type special drive integrated circuit. The circuit has a built-in timing logic short-circuit protection circuit, and has a protection delay function. Driver protection principle circuit shown in Figure 3 (b). In addition to the IGBT drive circuit itself to provide short-circuit (overcurrent) protection, in parallel with the IGBT RC buffer branch and power supply parallel absorption capacitors on both sides of the method is also effective.
Konklizyon
Ekipman pou chanje pouvwa sa a pi apwopriye pou aplikasyon pratik. Paske konsepsyon paramèt nan sikwi redresman an baze sou konsiderasyon sèl-faz, lè yo itilize nan ekipman pou pouvwa twa-faz gen ase maj, se konsa ke sistèm nan pi estab ak serye; itilize nan yon sèl-faz ekipman pou pouvwa tou ka travay nòmalman. Sa a rezoud kontradiksyon nan chanje ekipman pou pouvwa akòz limit ekipman pou pouvwa. Avèk metòd sa a, yo kapab tou transfòme ekipman pou pouvwa a ki deja egziste nan yon sèl-faz, twa-faz ekipman pou pouvwa dwe apwovizyone.
