High-Efficiency Full-Bridgeless PFC Power Supply Circuit Noriyuki Oiwa, Shogo … · 2019-08-18 ·...
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High-Efficiency Full-Bridgeless PFC Power Supply Circuit Noriyuki Oiwa, Shogo Katayama,Yasunori Kobori, Anna Kuwana, Haruo Kobayash (Gunma University) 1.Objective [1] Y. Kobori, L. Xing, G. Hong, T. Shishime, M. Ohshima, H. Kobayashi, N. Takai, K. Niitsu, “Novel AC-DC Direct Converter Design with PFC”, International Conference on Power Electronics and Power Engineering, Phuket, Thailand (Dec. 2011). [email protected] Reference 6.Conclusion 3.Proposed Circuit 4.Simulation Result 5.Relation Vlim AC-DC converter improvement ➾ Efficiency Decreasing Conduction loss Diode brede → MOSFETs 2.Background AC-CD converter usage ・ Decreasing switching loss and conduction Loss Goal Good! Bad! Very good! ● Change module in Bridge Diodes → MOSFETs Efficiency increases 5.0% ● Optimal Vlim choice Causes efficiency down！ Diode Bridge Generating reverse current Problem • Easier use • Low cost Good point • Constant Loss (conduction voltage 1V ） Bad point -100 50 -6 2 473 476 500 505 510 515 520 525 530 535 540 910 916 Time(ms) Vin (V) Vo (V) Io (mA) Iin (A) 4A 3V 4mA 142V -100 50 -6 2 401 405 409 500 505 510 515 520 525 530 535 540 1.21 1.225 Vin (V) Vo (V) Io (mA) Iin (A) Time(ms) 4A 4V 10μA 142V Conventional PFC Half-Bridgeless PFC -100 50 -6 2 390 398 65 70 75 80 85 90 95 100 1.3 1.325 Time(ms) Vin (V) Vo (V) Io (mA) Iin (A) 4A 8V 25μA 142V Full-Bridgeless PFC Efficiency 94.2 % 97.2 % 99.6 % 98.9 99 99.1 99.2 99.3 99.4 99.5 99.6 99.7 40 50 60 70 80 90 100 110 120 efficiency VLim Vin=AC100 (V) Vin=AC85 (V) (%) (V) Vlim smaller → generate reverse current Vlim larger →Nearly Half-Bridgeless operation Not Boost Voltage! Efficiency Down! [2] H. Kobayashi, T. Nabeshima (Editors), Handbook of Power Management Circuit, Pan Stanford Publisher (2016). [3] N. Miki, N. Tsukiji, K.Asaishi, Y. Kobori, N. Takai, H. Kobayashi, “EMI Reduction Technique With Noise Spread Spectrum Using Swept Frequency Modulation for Hysteretic DC-DC Converters”, IEEE International Symposium on Intelligent Signal Processing and Communication Systems, Xiamen, China (Nov. 2017) Vin PFC circuit sw1 sw2 sw3 sw4 Rout V Lim Controler Limit switching operation (Vlim) 0 1 2 3 4 5 25 30 35 40 45 0 1 2 3 4 Time(ms) 40 35 30 25 20 45 5 0 5 5 5 0 0 0 Switching Pulse at sw1 Switching Pulse at sw2 Switching Pulse at sw3 Switching Pulse at sw4 (V) (V) (V) (V) (V) Limit Switching Switching limits by Vin value ➡ Add safety time Best point : Vlim 40~50V PFC circuit sw1 sw2 sw3 sw4 Rout Vin Only normal switching → Not Boost Because reverse current generate! As replaced by MOSFETs, efficiency is increased. Full-Bridgeless PFC PFC: Power Factor Correction 2B-08 Output increases gradually
Transcript of High-Efficiency Full-Bridgeless PFC Power Supply Circuit Noriyuki Oiwa, Shogo … · 2019-08-18 ·...
High-Efficiency Full-Bridgeless PFC Power Supply Circuit
Noriyuki Oiwa, Shogo Katayama,Yasunori Kobori, Anna Kuwana, Haruo Kobayash
(Gunma University)
1.Objective
[1] Y. Kobori, L. Xing, G. Hong, T. Shishime, M. Ohshima, H. Kobayashi, N. Takai, K. Niitsu, “Novel AC-DC Direct Converter
Design with PFC”, International Conference on Power Electronics and Power Engineering, Phuket, Thailand (Dec. 2011).
Reference
6.Conclusion
3.Proposed Circuit
4.Simulation Result
5.Relation Vlim
AC-DC converter improvement
➾ Efficiency
Decreasing Conduction loss
Diode brede → MOSFETs
2.Background
AC-CD converter usage
・ Decreasing switching loss
and conduction Loss
Goal
Good!Bad!Very good!
● Change module in Bridge
Diodes → MOSFETs
Efficiency increases 5.0%
● Optimal Vlim choice
Causes efficiency down！
Diode Bridge
Generating reverse current
Problem
• Easier use• Low cost
Good point
• Constant Loss(conduction voltage 1V ）
Bad point
Vin
/ V
-100
50
Iin /
A
-6
2
Vo /
V
473
476
time/mSecs 5mSecs/div
500 505 510 515 520 525 530 535 540
Io /
mA
910
916
Time(ms)
Vin
(V
)V
o (
V)
Io (
mA
)Ii
n(A
)
4A
3V
4mA
142V
Vin
/ V
-100
50
Iin
/ A
-6
2
Vo2 / V
401
405
409
time/mSecs 5mSecs/div
500 505 510 515 520 525 530 535 540
Iout / A
1.21
1.225
Vin
(V
)V
o (
V)
Io (
mA
)Ii
n(A
)
Time(ms)
4A
4V
10μA
142V
Conventional PFC Half-Bridgeless PFC
Vin
/ V
-100
50
Iin /
A
-6
2
Vo /
V
390
398
time/mSecs 5mSecs/div
65 70 75 80 85 90 95 100
Iout
/ A
1.3
1.325
Time(ms)
Vin
(V
)V
o (
V)
Io (
mA
)Ii
n(A
) 4A
8V
25μA
142V
Full-Bridgeless PFC
Efficiency 94.2% 97.2% 99.6%
98.9
99
99.1
99.2
99.3
99.4
99.5
99.6
99.7
40 50 60 70 80 90 100 110 120
eff
icie
ncy
VLimVin=AC100 (V) Vin=AC85 (V)
(%)
(V)
Vlim smaller
→ generate reverse current
Vlim larger
→Nearly Half-Bridgeless operation
Not Boost Voltage!
Efficiency Down!
[2] H. Kobayashi, T. Nabeshima (Editors), Handbook of Power Management Circuit, Pan Stanford Publisher (2016).
[3] N. Miki, N. Tsukiji, K. Asaishi, Y. Kobori, N. Takai, H. Kobayashi, “EMI Reduction Technique With Noise Spread Spectrum Using Swept Frequency
Modulation for Hysteretic DC-DC Converters”, IEEE International Symposium on Intelligent Signal Processing and Communication Systems, Xiamen,
China (Nov. 2017)
Vin
PFCcircuit
sw1
sw2
sw3
sw4
Rout
VLim
Controler
Limit switching operation (Vlim)
U6-O
UT
/ V
0
1
2
3
4
5
time/mSecs 5mSecs/div
25 30 35 40 45
U32-O
UT
/ V
0
1
2
3
4
Time(ms)4035302520 45
5
0
5
5
5
0
0
0
SwitchingPulse at sw1
SwitchingPulse at sw2
SwitchingPulse at sw3
SwitchingPulse at sw4
(V)
(V)
(V)
(V)
(V)
Limit Switching
Switching limits by Vin value
➡ Add safety time
Best point : Vlim 40~50V
PFCcircuit
sw1
sw2
sw3
sw4
RoutVin
Only normal switching
→ Not Boost
Because reverse current generate!
As replaced by MOSFETs, efficiency is increased.
Full-Bridgeless PFC
PFC: Power Factor Correction
2B-08
Output increases gradually
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