无桥PFC控制系统仿真
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Bridgeless PFC Control System
Hongchang Li
Bridgeless PFC
As a representative of bridgeless PFC, the dual boost PFC stage in Fig. 1 is selected to be the controlled plant in this paper.
0 0
Input Voltage
Inductor Current
Output Voltage
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0Biblioteka Baidu1
Fig. 5 Simulation result.
During positive and negative half-line cycles, the bridgeless PFC works as a boost converter:
+
L1
Vin
L2
-
(a)
+
C
R
Vo
-
-
L1
Vin
L2
+
(b)
Fig. 2. Dual boost PFC during (a) positive and (b) negative half-line cycle.
+
C
R
Vo
-
Control System
The bridgeless PFC control system model is built and simulated with MATLAB Simulink.
1 Vin +
2 Vin -
D3
D4
2
IL
+
i -
IL Measurement
L1
L2
+ -
v
1
S1
Vin Measurement Vin
m
g
S
D
D1 S2
m
g
S
D
D2 C bus
PWM1 1
PWM2 2
3 Vo +
+ -
v
3
Vo Measurement Vo
4 Vo -
Fig. 3 Dual Boost PFC Circuit Model.
Discre te , Ts = 1.1e-006 s.
Parameter
RMS value of input voltage Vin Line frequency fL Output voltage Vo Load R Inductance L1, L2 Capacitance C Switching frequency fs
Value 220V 50Hz 400V 160Ω 200μH 500μF 100kHz
IL PWM2
Vo
|u| Vin_abs
|u| IL_abs
Vin +
Vo +
Vin -
Vo -
Vac
R
Dual Boost PFC
Scope
Fig. 4 Control System Model.
400
200
0
-200
-400 15 10 5 0 -5 -10 -15
500 400 300 200 100
L1
Vin
L2
+
C
R
Vo
-
Fig. 1. Dual boost PFC.
The operation characteristics and the system parameters are
Table 1. Operation Characteristics and System Parameters
powe rgui
V PF
I
Power Factor Detector
0.9945 Di sp l a y
0.05s+1
400 s2+100s
s+1000
D
PWM
PWM1
Vin
Vref
Voltage Compensator
Product
s Current Compensator PWM Generator
Hongchang Li
Bridgeless PFC
As a representative of bridgeless PFC, the dual boost PFC stage in Fig. 1 is selected to be the controlled plant in this paper.
0 0
Input Voltage
Inductor Current
Output Voltage
0.01
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0Biblioteka Baidu1
Fig. 5 Simulation result.
During positive and negative half-line cycles, the bridgeless PFC works as a boost converter:
+
L1
Vin
L2
-
(a)
+
C
R
Vo
-
-
L1
Vin
L2
+
(b)
Fig. 2. Dual boost PFC during (a) positive and (b) negative half-line cycle.
+
C
R
Vo
-
Control System
The bridgeless PFC control system model is built and simulated with MATLAB Simulink.
1 Vin +
2 Vin -
D3
D4
2
IL
+
i -
IL Measurement
L1
L2
+ -
v
1
S1
Vin Measurement Vin
m
g
S
D
D1 S2
m
g
S
D
D2 C bus
PWM1 1
PWM2 2
3 Vo +
+ -
v
3
Vo Measurement Vo
4 Vo -
Fig. 3 Dual Boost PFC Circuit Model.
Discre te , Ts = 1.1e-006 s.
Parameter
RMS value of input voltage Vin Line frequency fL Output voltage Vo Load R Inductance L1, L2 Capacitance C Switching frequency fs
Value 220V 50Hz 400V 160Ω 200μH 500μF 100kHz
IL PWM2
Vo
|u| Vin_abs
|u| IL_abs
Vin +
Vo +
Vin -
Vo -
Vac
R
Dual Boost PFC
Scope
Fig. 4 Control System Model.
400
200
0
-200
-400 15 10 5 0 -5 -10 -15
500 400 300 200 100
L1
Vin
L2
+
C
R
Vo
-
Fig. 1. Dual boost PFC.
The operation characteristics and the system parameters are
Table 1. Operation Characteristics and System Parameters
powe rgui
V PF
I
Power Factor Detector
0.9945 Di sp l a y
0.05s+1
400 s2+100s
s+1000
D
PWM
PWM1
Vin
Vref
Voltage Compensator
Product
s Current Compensator PWM Generator