Power Factor Correction in Power Conversion Applications ...

1 2008 Microchip Technology - 1AN1106 AC-DC AC DC DC 500 2 (PF) (THD) PF (DSC) (PFC) 16 dsPIC DSC PFC PFC DCS - (ADC) (PWM)

2 PFC PF 2 (kW) (kWh) (kVAR) (kVA) 1 PFC :Vinaya SkandaMicrochip Technology DSC AN1106DS01106A_JP - 2 2008 Microchip Technology Inc.

3 1:PFC PFC DC PFC 1 1: 2 2 2 DC DC PFC PFC 00 = / 2008 Microchip Technology - 3AN1106 2: ( UPS SCR ) ( ) ( ) 2 (THD)

4 PFC 2 (V) (I) 2: = cos = THD = I1 = I2 = cos11I2I1 ()2I3I1 () +++------------------------------------- -------------------------------- cos1 THD2+----------------------------== THD1I2I1 ()2I3I1 () +++= RIVVItV (t)I (t)AN1106DS01106A_JP - 4 2008 Microchip Technology Inc.

5 MOSFET IGBT PFC (L) (C) 3 4 3: 4: PFC 3 4 2 PFC AC IL+C V- 2008 Microchip Technology - 5AN1106 PFC DSC

6 PFC 5 PFC dsPIC PFC AC-DC AC DC 3 DC 3 dsPIC PWM DC PFC 5 5: DC dsPIC AC AN1106DS01106A_JP - 6 2008 Microchip Technology Inc.

7 PFC (MOSFET) VOUT 6 PFC 7 PFC 6: PFC 7: PFC PFC PFC DC (MOSFET) VIN 8 PFC 9 PFC 8: PFC 9: PFC PFC PFC DC (MOSFET) (VIN+ VOUT) 10 PFC 11 PFC 10: PFC 11: PFC (CMM)

8 +CoD-L tt+Co-DLtt +CoD-Ltt 2008 Microchip Technology - 7AN1106dsPIC30F6010A PFC PFC dsPIC30F6010A PFC dsPIC 12 dsPIC30F6010A PFC dsPIC AC DC DC PFC 2 PFC 12.

9 DsPIC30F6010A PFC +-AN11AN9AN6 PWM 1 VAVG2 VAVGVERRVDCREFIACIERR VAC VACVPIIACREFCoAC LD - dsPIC30F6010A VDCAN1106DS01106A_JP - 8 2008 Microchip Technology 13 14 3 13: PFC 14: PFC k2k3k1 LDQCoLoad VDCVDCIACVACVACIACVAC AC VPI = VCOMP = IPI = k1, k2, k3 = : dsPICDEM MC1H 3 (DS70096)

10 VACk2 =IACk3 =VDCk1 = kmVACxxxxxx VPI = VCOMP = IPI = km = VERRVDCREFVDCVPIIACREFIACIERRIPIVCOMP MOSFET VACVAVG VACN------------------=1 VAVG2-------------------- 2008 Microchip Technology - 9AN1106 IACREF IAC IAC IACREF 100 kHz 5 kHz 10 kHz 80 kHz 8 kHz 80 kHz GI PFC MOSFET DC VDCREF DC IO VAC DC VDC VDCREF GV IACREF VAC VPI