CCM Boost输出电容纹波电流有效值
时间:2025-05-13
时间:2025-05-13
输出电容纹波电流有效值
Vin Vo(1 D)
IL(avr)
Io
1 D
IoV*D(1 D)T
o*[t D*T ] 1 DL2
IL
由IC IL Io,则:
Icrms
2
1
(IL Io)2dt T0
2
T
Icrms
2I122
ILdt o ILdt Io T0T0
TT
1
又有 ILdt Io,则:
T0
T
Icrms
2
122 ILdt Io T0
T
Icrms
2
122 ILdt Io TD*T
T
IV*D1(1 D)T22
o o*[t D*T ]}dt Io TD*T1 DL2
T
Icrms
2
Icrms Icrms
2
2
1 T
2
(1 D)*T
IoVo*D(1 D)T22{ *[t ]}dt Io 1 DL2
(1 D)*T
2
(1 D)*T
I2VID
o *oo
1 DT(1 D)L
2
VoD2(1 D)T
[t ]dt 2
2LT
2
[t
(1 D)T22
]dt Io
2
Icrms
2
IoD2VoIoDVoD2 * )*T/2tdt L2T1 DT(1 D)L (1 D
(1 D)*T/2
(1 D)*T/2
2
(1 D)*T/2
t
dt
Icrms
2
ID1VoIoD o **t21 DT(1 D)L
2
(1 D)*T/2 (1 D)*T/2
VoD23 *t2
3LT
2
(1 D)*T/2 (1 D)*T/2
Icrms
2
IoDVoD2(1 D)3
22
1 D12Lf
22
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