高効率・双方向絶縁型 DCDC コンバータ

1 DCDC ( ) High Efficiency Bi- directional Isolated DCDC converter Naoki Koike, Yuki Otabara, Tetsuma Hoshino, Shin-ichiro Nagai (Pony Electric co., ltd.) This paper proposes an isolated 8 kW bi- directional chopper circuit which includes an auxiliary resonant commuted pole (ARCP) soft switching circuit. Isolation is achieved with a current resonant isolated DCDC converter . The ARCP soft switching circuit uses transformer instead of smoothing capacitor in the input DC voltage. The proposed ARCP soft switching circuit can achieve the zero voltage soft switching in the main switch, and the current resonant isolated DCDC converter is enable to zero current soft switching transition. As a result of experiments on the 8 kW system, it was indicated that the proposed system could attain the conversion efficiency 95 % at 40 kHz switching.

2 Keywords ARCP LC 1 EV HEMS EV HEMS (1)(2) ( ARCP ) ARCP ARCP (3) ARCP ARCP Turn on ARCP ON (ZVS) Turn-off DCDC 8kW 2 1 (Clink) ARCP DC/DC 2 ARCP DC/DC (Qr1 Qr2) (Lr1) (Cr1 Cr2) (Tr1) DC/DC Ql1~Ql4 Ql5~Ql8 (Lr2) (Tr2) (Cr1 Cr2) 3 3 1 ARCP 2 ARCP (Qs1 Qs2) ON (Qr1 Qr2)

3 ON Cr1 Cr2 Lr 0V ON (ZVS) Cr1 Cr2 ( ) (Qs2 Qr2) (Qs1 Qr1) 2 4 5 3 1 1 ARCP <mode0: > ( ) bat-Lout-Qs2-link(Qs1-Lout-bat) <mode1: (Turn-on)> Qr1(Qr2) Turn-on mode0 Qs2 Qr1 bat-Lout-Qs2-link(Qs1-Lout-bat) bat-Lout-Lr-Qr1(link-Qr2-Lr-Lout-bat) Vlink/2 Lr Vlink/2L <mode2:LC > mode1 Lr Lout Cr1,Cr2 Cr1-Lr-Qr1 Cr2-Lr-Qr1-link(Cr2-Lr-Qr2 Cr1-link-Qr2-Lr) Cr1(Cr2) 0 Qs1(Qs2) Turn-on <mode3: > Qs1(Qs2) Turn-on Lr - Vlink/2 Lr Vlink/2L bat-Lout-Lr-Qr1(link-Qr2-Lout-bat) bat-Lout-Qs1(link-Qs2-Lout-bat) <mode4: > Qr1(Qr2) Turn-off (ZCS) ( ) Qs1-Lout-bat (bat-Lout-Qs2-link) <mode5.

4 (Turn-off)> Qs1(Qs2) Turn-off Cr1(Cr2) ( ) Lout1 ClinkLr1Qs1Qs2Qr1Qr2Tr1Tr2Cr1Cr2Ql1Ql2Ql 3Ql4Lr2Cr1Cr2Ql5Ql6Ql7Ql8 ARCP DC/DC batterybus 1 Qs1_ Lout Lr Qs1_ tQr2_gateQs2_gateTurn on(ZVS&ZCS)Turn off(ZVS)Mode1 Mode2 Mode3 Mode0 Mode4 Mode5 Mode00A 2 ARCP ( ) Qs_ Lout Lr Qs tQr1_gateQs1_gateTurn on(ZVS&ZCS)Turn off(ZVS)Mode1 Mode2 Mode3 Mode0 Mode4 Mode5 Mode00A 3 ARCP ( ) (ZCS) 3 2 DC/DC 6 7 DC/DC 4 4 1 320V bus 360V 420V 8kW 40kHz Lr1 Cr1,Cr2 10 8 ARCP DCDC DCDC DC ARCP 4 2 9 ARCP DC/DC DC/DC 2 3 Tr2 2 4 Tr2 ARCP (Qs1,Qs2)

5 TO247 3 ARCP LoutLrOFFOFFLoutLrOFFONOFFOFFONOFF<mode0> <mode2> <mode1>LoutLrOFFOFFONOFFbusQs2Qs1Qr1Qr2Qs2Qs1Qr 1Qr2Qs2Qs1Qr1Qr2batterybatterybatterylin klinkCr2Cr1Cr2Cr1Cr2Cr1<mode4>LoutLrONOFFOFFOFFQs2Qs1Qr1Qr2batterylink Cr2Cr1<mode5>LoutLrOFFOFFOFFOFFbusQs2Qs1Qr1Qr2battery Cr2Cr1<mode3>LoutLrONOFFOFFOFFQs2Qs1Qr1Qr2batterylink Cr2Cr1 4 ARCP ( ) LoutLrOFFOFFOFFOFF<mode1>busQs2Qs1Qr1Qr2batteryCr2Cr1 LoutLrOFFOFFONOFF<mode0>Qs2Qs1Qr1Qr2batterylinkCr2Cr1 LoutLrOFFOFFONOFF<mode5>Qs2Qs1Qr1Qr2batterylinkCr2Cr1 LoutbatteryLrONOFFOFFOFF<mode2>Qs2Qs1Qr1Qr2linkCr2Cr1 LoutLrOFFONOFFOFF<mode4>busQs2Qs1Qr1Qr2batteryCr2Cr1linkLoutLrOF FONOFFON<mode3>Qs2Qs1Qr1Qr2batteryCr2Cr1 5 ARCP ( ) tQl1_gateQl2_gateMode0 Mode1 Mode2 Mode3 Mode0Ql1 Ql1 Ql2 Ql2 6 DC/DC busTr2Ql1Ql2Ql3Ql4Lr2Cr1Ql5Ql6Ql7Ql8 ONOFFOFFONONON linkOFFOFFbusTr2Ql1Ql2Ql3Ql4Lr2Cr1Ql5Ql6 Ql7Ql8 OFFONONOFF linkONOFFOFFON<mode0> <mode2>busTr2Ql1Ql2Ql3Ql4Lr2Cr1Ql5Ql6Ql7Ql8 OFFOFFOFFOFF linkOFFOFFOFFOFF<mode1>busTr2Ql1Ql2Ql3Ql4Lr2Cr1Ql5Ql6Ql7Ql8 OFFOFFOFFOFF linkOFFOFFOFFOFF<mode3> 7 DCDC ARCP DC/DC LoadVlink 8 ( ) (Qr1,Qr2) TO247 SJ-MOSFET 4 3 10 Lr LC LC Lr (Lout )

6 10 11 12 ARCP DC/DC Turn-on ZVS Turn-off ZCS Turn-on Turn-off ZCS 4 4 13 ARCP 4kW~8kW 98 DCDC 5kW~8kW 96 8kW 5 DCDC 8kW 10kW 10 EV V2H HEMS (1) DC D , (2000) (2) D , (2002) (3) ARCP D , (2010) (4) PWM D , (1998) ARCP DC/DC Tr2 DC/DC Lr2Tr1Cr1 9 -1001020304050-1000100200300400500time[1 us/div] [100V/div]Lr [10A/div]8kW5kW2kW 10 Lark ( ) -30-20-1001020304050-300-200-10001002003 00400500time[ ] [100V/div] [10A/div]-30-20-1001020304050-300-200-10 00100200300400500time[ ] [100V/div] [10A/div] (a)Turn on (b)Turn off 11 ARCP [ ] [100V/div] (Tr2) [3A/div] -15-12-9-6-303691215-500-400-300-200-100 0100200300400500 [100V/div] (Tr2) [2A/div]time[ ] (a)Turn on (b)

7 Turn off 12 DC/DC 80828486889092949698100-8 -6 -4 -2 0 2 4 6 8 ( ) (kW) ARCP DC/DC ARCP DC/DC 13