International Documents and Reports Digital power electronics T=1/ff EF-Energy Factor PF-pumping Factor SE-stored Energy CIR-Capacitor-inductor stored energy Ratio τ τ d ZOH/FOH/SOH τ- EF PF SE 中图分类号 :TN86 文献标识码 :A 文章编号 :1606-7517(2009)05-6-115 DC-DC AC-AC DC-AC PWM AC-DC DC-DC DC-DC EF EF DC-DC 100 EF PF SE / 2009.06 115
International Documents and Reports CIR EL DC-DC (4) DC-DC 1 2 EF super-liftluo EFPESE CIR V 1 I 1 V 2 I 2 f T=1 / f K EF DC-DC / CIR (5) (6) 1 T EL EL=P loss T (7) 2 Luo η IGBT MOSFET P r P e P d P loss P loss =P r +P e +P d (8) EF DC-DC P in =P o +P loss =P o +P r +P e +P d =V 2 I 2 +P r +P e +P d (9) T EL=P loss T=(P r +P e +P d ) T (10) η PE TV 1 (11) τ (1) τ d n L n C (2) (3) DC-DC τ (12) DC-DC τ d (13) 116 2009.06
International Documents and Reports DC-DC ζ DC-DC ζ DC-DC DC-DC τ τ d DC-DC (14) DC-DC DC-DC M=V 2 /V 1 15 DC-DC (25) (16) 3 τ (12) τ d (13) (26) (14) u 4 DC-DC DC-DC =τ d /τ=1.31 0.25 -S 1 S 2 S 1 =σ+jws 2 =σ-jw (24) DC-DC 3 1 V 1 =40V f=20khzt=50sl=250μhc=60μfr=10ω r L =1.5Ω K 0 0.4 V 2 =14VI 2 =I L =1.4AP loss = I 1 =0.564A PE=V 1 I 1 T 1 (18)=1.128mJ SE=W L +Wc(21)=6.125mJEL=P loss T(22)=0.147mJ, EF=SE/PE=6.125/1.128=5.43 4 K 0.4 0.5 V 2 =17.4VI 2 =I L =1.74A =1.742 1.5=4.54WI 1 =0.871A V 2 =3.4V I 2 =I L =0.34A 2009.06 117
International Documents and Reports V C2 =V 2 =57.25V PE=V 1 I 1 T=6.87mJ I 1 =0.313A SE=1817.6mJ PE=0.626mJ W L =0.136mJ W C =3.284mJ SE=W L +W C =3.420mJ EL=0.08mJ,, EL=P loss T=0.3146mJ, (12) S 1 =σ+jws 2 =σ-jw 3 (25) (27) τ=0.544ms τ d =0.775ms=1.42τ ζ=1.42>0.25 -S 1 -S 2 (28) 5 (29) 6 5 Luo 2 K Lou Super-Lift Lou-converter V 1 =20V (30) f=50khzt=20μsl=100μhc 1 =2500μFC 2 =800μF u 7 R=10Ω r L =0.12Ω 6 Luo K 0.5 0.6 V 2 =65.09VI 2 =6.509AI 1 =22AI L =14.91A K 0 0.4 V C1 =V 1 =20V V 2 =57.25VI 2 =5.725AI 1 =17.175AI L =11.45AV C2 =V 2 =65.09V V 2 =7.74V I 2 =0.784A V C1 =V 1 =20V I 1 =4.825A I L =3.46A 118 2009.06
International Documents and Reports zero-order-hold-zoh V C1 =V 1 =0V V C2 =V 2 =7.84V (SOH) (33) 3 PE=1.93mJ W L =1.385mJ W C1 =0mJ W C2 =383.68mJ ZOH (33) AC-DC First-order-Hold-FOH FOH (33) 2 DC-AC AC-AC 7 Luo second-order-hold-soh DC-DC SE=385.06mJ EL=P loss T=0.148mJ Z ZOH/ FOH/SOH Z- Z- DC-DC 1940 DC-DC (31) DC-DC 6 (30) DC-DC 8 (32) DC-DC EF DC-DC Luo EF DC-DC 8 Luo [1] Sira-Ramirez,H.and Ilic,M.Exact Linearization in Switched Mode DC-DC Power Converters.International Journal p(t) of Control,Vol.50,No.2,August 1989,PP.511 524. (32) [2] D.Czarkowski and M.K.Kazimierczuk.Energy conservation approach to modelling PWM DC-DC (33) converters.ieee Trans.on Aerospace and Electronic 2009.06 119
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