差模、共模应用计算
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@oiqP
( Common Mode Choke )]-p @oiqP¤S@§yu°é (H¤U@qP CM.M.Choke FilterC
1. @qP¤u§@-ìz
,óy¤GMoiqeH¤qP¤¤qyq@¤ ,q b}q¤¤ ,o¨¤z-Y¤[H§¨ ,±N ¤z (noise ) ,Pé¤Jq¤¤¤]sb¤uWH~°i°T ( -tü]}q¨-y¨l` ,]-Y¤z°êa¤§wW÷cq¤z EMI )ogq§§@X EMI¤]H¤§¤éqY- ,H}q ¤F¨WwCíe}q}Wv¤é°W¤ ,HF¨ìY¤@Ww ¤¤§]mEMIoi ,EMIoi±`¤@°T§§@X§í¨ C±`oi-tdoXé¤JéX¨u¤§t¤zZH,@oi-tdoX¨±¤Ju ,¤Si¤° AC CM.M.CHOKE ; DC CM.M. ¤§@¤zZHCê@qP]¨¤u§@¤P CHOKEM SIGNAL CM.M.CHOKE¤T,b]-p óH°¤C¨¤u§@-ìz§P ,
2 6
,-Y¤\iq§Cqy±K×C
2
°]¨é¤Jqy I i = 1.2A, ¨ú J = 4 A / mm
h
Aw = 1.2 / 4 = 0.3 mm
2
0.70 mm X
,¤èiT{]-p¤§ia ,]°¨§@¤u ê@qPqLê°~iú t§¤]±N-PqP° t§vToiG , p¤qeW[, ±N¨°W°T§ó ,¨¤,¨¨Pqt§¤j ,±`H§¨¤@w§C
N
§N¤ 2004/06
Inductor Design Theory
Step 2 CORE§÷è¤IZETw S
,pN-n§C - H¨¤§¤¤§§÷, B ±qe-z]-p-n¨D¤¤i ,@qP¤M Bs ]-n°qP- ,ui-¤]N-n°,P§ClM° -, CORE§÷è,eHMn - Zn Ké§÷ CORE°XAC X¤W-z-n¨D¤§ ,-ìh¤Wu-nXqPq ,Bb¤\§CWl COEE SIZEb]-p¨L¤@wWw dò¤,H]-p~én¤p¤§YiC ] ,CORE§÷è¤SIZE¨ú H¨B¤\lBw§@qC@qP±` CORE¤§uiùb 2000 ~ 10000¤§CIron Powder Core ¤]§CKl , °BsM§C B - H¨¤§¤v,¨ui§C,G¤@¤Qó@qP ,oO±`qP¤§u §÷C
ìXqP ( Coupler Choke ) xà-iqP ( Smooth Choke )
¤ju°é ( MAG AMP Coil ) @oiqP]-n¨D¨u°é¨ PqP-,P§,GqP§ ]-p ,¨§h°TOROIDBUUBET§C
ຫໍສະໝຸດ Baidu
§N¤ 2004/06
Inductor Design Theory
2 -6 2 2 -12
§N¤ 2004/06
Inductor Design Theory
,i±o¨ìz×-n¨DqP-,-YQò±o§ó§CI¤Wv ,hii¤@¨B[¤jqP- , fo p 10KHZCzפWqPqV° EMI§í¨GVn ,L°qP±N¨ I¤Wv¤@¤§Có ,êoiuà°¨ì¤@w±ae¤]N¨°W°T§í¨Gt¤@ , ( I¤Wv§ó§C 10MHZ¤§±§ )Ct~,qPqU°h , }q°T¨¤ù°5 ~10MHZ,¤]WL , ( DCR ¤j ) C`W[¨¤q u`Uh,CORE¤§uiV° p±Ny¨§CW§W[ ui¨COREM , e¤]H¤§W¤j( p4 ) ,¨°WqygqeyqCL° ,¨¤]°C P¨§@¤]§x C d L R R C d L 1 L 2 4 ¤qeCd¤§q
2
êoiLkF¨ìzQoi¨°~k§±u,q±`i±NI¤Wv]wb 50KHZkCb,°] f o = 50KHZ, h L = 1 / (2kf o ) C = 1/ [( 2*3.14*50000) *3300*10 ] = 3.07mH L1B L2B C1¨ ( §Cq ) ±`oi ,uqe1.0uF,h±`qP° : L = 1/ [( 2*3.14*50000) *1*10 ] = 10.14uH
§N¤ 2004/06
Inductor Design Theory
Step 3 NMu| w d Tw` CORE¤§Wp¨T18*10*7BA10BAL = 8230±30%,h : , -Tw N = L / AL = (3.07*10 ) / (8230*70%) = 23 TS u|Hqy±K× 3 ~ 5A / mm °-ìh
2
EMIoiq
§N¤ 2004/06
Inductor Design Theory
2. @ q P ] - p
,--nqu°éXH¤U-ìh : b]-p@qP¤§e 1 > ±`¤u§@A¤U ,¤-P]qqqqyy¨MC 2 > °W¤zZH-n¨°÷¤j§ ,B¤@wWe ,¤u§@Wv¤§Hqy ¤p§C 3 > qPרt¤p ,¤qey¤pC 4 > yqq¤pC 5 > PqPq¤j ,qP--wC 6 > ¤§t¨wW-n¨DC
Inductor Design Theory
3. ] - p | ¨
L L1 220V 50HZ C 1 1g L2 G 3 ê EMI oi L3 C 3 3300P
C 2
3300P
Step 0 : p3EMIoiq CX = 1.0 Uf
Cy = 3300PF
EMI : Fcc Class B
Type : Ac Common Mode Choke
§N¤ 2004/06
Inductor Design Theory
Step 1 : qP( L )Tw: L C2BC3¨@oi§í¨,êL3PC2M C3c¨ qi@H3M Nu¤W ,¤]¤wqe ¨LCêpq,¤§O§lLM °TCu-nTwoiqI¤Wv L eq C,hiH¤U¨DXqP C f o = 1 / (2kLC) : q±` EMIúWep¤U ¤zZ : 150KHZ g¤zZ : 30MHZ 30MHZ 1GHZ ( ` : VDE 10KHZ - 30M ) L = 1 / (2kf o ) C
Inductor Design Theory
§-z qP¤ @qP¤u§@-ìz @qP]-p @qP¤
§N¤ 2004/06
Inductor Design Theory
§-z
,Qsxóq¤O qP§@°¤ó--n¨¤ q¤lu¤¤C¤×¨bqq ¤¤§óO¤i¤Cp¤u~±±¨]¤¤q~q,q¤O¨t¤§q\-pqí (q× ,q±Pog¤§§÷¤}qP í)C}q]é¤JMéXoi : CqPbq¤lu¤¤D-n§@xàBoiB§yBC "\v " bqq¤¤,óqBz§O¤jqy°qàq ,GqPh° ,b]-p]}q¤è¤¤@, qPCO]°\vqP¤Pó¤pHBzqP ,y¨]-p§xCíeqq¤¤qPD-nóoiBx ]-p¤è¤]NU-n¨D àBàqH¤\v]C ,]-p¤u§@±p qP]-p[\¤Fqz× ,§÷H¤wWh¤è-± (p: )M¤FH§@XXz]-pC M°-n¨D qyBqBWvB¤B§÷S
§N¤ 2004/06
Inductor Design Theory
4. ¤ p
1 > @qP§@Oo°u¤¤ ,]-p-n¨D¨¨§ @°T c ,q°PC 2 > @qP¤qe§í¨°W°T-t-±vT ,q¤pC 3 > @qPP-Po°°T ,q±`P-b 2mH ~ W±a¤°tXqeeq 50 mH¤§C
§N¤ 2004/06
§N¤ 2004/06
Inductor Design Theory
qP¤
,q±`qP]-pOH qPH¨B~cB§B~i¤°¤P ,qPi¤° : ~¤§@°XoI}lCb}q¤¤H¨~¤P @oiqP ( Common Mode Choke ) ±`oiqP \v]qP ( Normal Mode Choke ) ( Power Factor Correction - PFC Choke )
qX
,h¤¤¨¤P¤èV¤§q¤èC`q°s, 2,u-nO¨§
, ABB¨[¤WP ,T- u°éqPXG°s±`HL§§@C-Ybé¤J
§N¤ 2004/06
Inductor Design Theory
@H ,êuqy i1,b¤¤êuqX1,h¤¤qP
, ¤èV¤[±j ,¨¨C¤@u°éqP-°Wsb¨- XL = s L,] ,¤@ku °é@¤zZ±j§í¨§@C ,]-p¤]±`±`±NtP@§í¨qXb¤@°_ êEMIoi LBCX¨ ( p 2 ),] ,]-p¨oiqe¤j¤pH¤XwW§@XqP-¨MwC ¤¤L1B L2B C1c¨±`oi L1 L3 C 2 C 1 C 3 L2 ,L3B C2B C3c¨@oiC
§N¤ 2004/06
Inductor Design Theory
(1) ¤u§@-ìzp : X2 i1 A ~ B i2 i2 i1 X2 X1 OUT
X1 1 @qP§@
,k¤±whi,íbé¤J p,bP¤@¤W¤W¨¤èV¤u°é ABB¨[¤W¤ ,HT-Ptq,êuqy i2,b¤¤êu
§N¤ 2004/06
Inductor Design Theory
@qP¤§]-p¨BJ
:
Step 0 Step 1 Step 2 Step 3 Step 4 Step 5
SPEC¨ú±o: EMI¤\§O, ìmC qP-TwC core§÷è¤WTwC `¤u|TwC ú
§N¤ 2004/06
( Common Mode Choke )]-p @oiqP¤S@§yu°é (H¤U@qP CM.M.Choke FilterC
1. @qP¤u§@-ìz
,óy¤GMoiqeH¤qP¤¤qyq@¤ ,q b}q¤¤ ,o¨¤z-Y¤[H§¨ ,±N ¤z (noise ) ,Pé¤Jq¤¤¤]sb¤uWH~°i°T ( -tü]}q¨-y¨l` ,]-Y¤z°êa¤§wW÷cq¤z EMI )ogq§§@X EMI¤]H¤§¤éqY- ,H}q ¤F¨WwCíe}q}Wv¤é°W¤ ,HF¨ìY¤@Ww ¤¤§]mEMIoi ,EMIoi±`¤@°T§§@X§í¨ C±`oi-tdoXé¤JéX¨u¤§t¤zZH,@oi-tdoX¨±¤Ju ,¤Si¤° AC CM.M.CHOKE ; DC CM.M. ¤§@¤zZHCê@qP]¨¤u§@¤P CHOKEM SIGNAL CM.M.CHOKE¤T,b]-p óH°¤C¨¤u§@-ìz§P ,
2 6
,-Y¤\iq§Cqy±K×C
2
°]¨é¤Jqy I i = 1.2A, ¨ú J = 4 A / mm
h
Aw = 1.2 / 4 = 0.3 mm
2
0.70 mm X
,¤èiT{]-p¤§ia ,]°¨§@¤u ê@qPqLê°~iú t§¤]±N-PqP° t§vToiG , p¤qeW[, ±N¨°W°T§ó ,¨¤,¨¨Pqt§¤j ,±`H§¨¤@w§C
N
§N¤ 2004/06
Inductor Design Theory
Step 2 CORE§÷è¤IZETw S
,pN-n§C - H¨¤§¤¤§§÷, B ±qe-z]-p-n¨D¤¤i ,@qP¤M Bs ]-n°qP- ,ui-¤]N-n°,P§ClM° -, CORE§÷è,eHMn - Zn Ké§÷ CORE°XAC X¤W-z-n¨D¤§ ,-ìh¤Wu-nXqPq ,Bb¤\§CWl COEE SIZEb]-p¨L¤@wWw dò¤,H]-p~én¤p¤§YiC ] ,CORE§÷è¤SIZE¨ú H¨B¤\lBw§@qC@qP±` CORE¤§uiùb 2000 ~ 10000¤§CIron Powder Core ¤]§CKl , °BsM§C B - H¨¤§¤v,¨ui§C,G¤@¤Qó@qP ,oO±`qP¤§u §÷C
ìXqP ( Coupler Choke ) xà-iqP ( Smooth Choke )
¤ju°é ( MAG AMP Coil ) @oiqP]-n¨D¨u°é¨ PqP-,P§,GqP§ ]-p ,¨§h°TOROIDBUUBET§C
ຫໍສະໝຸດ Baidu
§N¤ 2004/06
Inductor Design Theory
2 -6 2 2 -12
§N¤ 2004/06
Inductor Design Theory
,i±o¨ìz×-n¨DqP-,-YQò±o§ó§CI¤Wv ,hii¤@¨B[¤jqP- , fo p 10KHZCzפWqPqV° EMI§í¨GVn ,L°qP±N¨ I¤Wv¤@¤§Có ,êoiuà°¨ì¤@w±ae¤]N¨°W°T§í¨Gt¤@ , ( I¤Wv§ó§C 10MHZ¤§±§ )Ct~,qPqU°h , }q°T¨¤ù°5 ~10MHZ,¤]WL , ( DCR ¤j ) C`W[¨¤q u`Uh,CORE¤§uiV° p±Ny¨§CW§W[ ui¨COREM , e¤]H¤§W¤j( p4 ) ,¨°WqygqeyqCL° ,¨¤]°C P¨§@¤]§x C d L R R C d L 1 L 2 4 ¤qeCd¤§q
2
êoiLkF¨ìzQoi¨°~k§±u,q±`i±NI¤Wv]wb 50KHZkCb,°] f o = 50KHZ, h L = 1 / (2kf o ) C = 1/ [( 2*3.14*50000) *3300*10 ] = 3.07mH L1B L2B C1¨ ( §Cq ) ±`oi ,uqe1.0uF,h±`qP° : L = 1/ [( 2*3.14*50000) *1*10 ] = 10.14uH
§N¤ 2004/06
Inductor Design Theory
Step 3 NMu| w d Tw` CORE¤§Wp¨T18*10*7BA10BAL = 8230±30%,h : , -Tw N = L / AL = (3.07*10 ) / (8230*70%) = 23 TS u|Hqy±K× 3 ~ 5A / mm °-ìh
2
EMIoiq
§N¤ 2004/06
Inductor Design Theory
2. @ q P ] - p
,--nqu°éXH¤U-ìh : b]-p@qP¤§e 1 > ±`¤u§@A¤U ,¤-P]qqqqyy¨MC 2 > °W¤zZH-n¨°÷¤j§ ,B¤@wWe ,¤u§@Wv¤§Hqy ¤p§C 3 > qPרt¤p ,¤qey¤pC 4 > yqq¤pC 5 > PqPq¤j ,qP--wC 6 > ¤§t¨wW-n¨DC
Inductor Design Theory
3. ] - p | ¨
L L1 220V 50HZ C 1 1g L2 G 3 ê EMI oi L3 C 3 3300P
C 2
3300P
Step 0 : p3EMIoiq CX = 1.0 Uf
Cy = 3300PF
EMI : Fcc Class B
Type : Ac Common Mode Choke
§N¤ 2004/06
Inductor Design Theory
Step 1 : qP( L )Tw: L C2BC3¨@oi§í¨,êL3PC2M C3c¨ qi@H3M Nu¤W ,¤]¤wqe ¨LCêpq,¤§O§lLM °TCu-nTwoiqI¤Wv L eq C,hiH¤U¨DXqP C f o = 1 / (2kLC) : q±` EMIúWep¤U ¤zZ : 150KHZ g¤zZ : 30MHZ 30MHZ 1GHZ ( ` : VDE 10KHZ - 30M ) L = 1 / (2kf o ) C
Inductor Design Theory
§-z qP¤ @qP¤u§@-ìz @qP]-p @qP¤
§N¤ 2004/06
Inductor Design Theory
§-z
,Qsxóq¤O qP§@°¤ó--n¨¤ q¤lu¤¤C¤×¨bqq ¤¤§óO¤i¤Cp¤u~±±¨]¤¤q~q,q¤O¨t¤§q\-pqí (q× ,q±Pog¤§§÷¤}qP í)C}q]é¤JMéXoi : CqPbq¤lu¤¤D-n§@xàBoiB§yBC "\v " bqq¤¤,óqBz§O¤jqy°qàq ,GqPh° ,b]-p]}q¤è¤¤@, qPCO]°\vqP¤Pó¤pHBzqP ,y¨]-p§xCíeqq¤¤qPD-nóoiBx ]-p¤è¤]NU-n¨D àBàqH¤\v]C ,]-p¤u§@±p qP]-p[\¤Fqz× ,§÷H¤wWh¤è-± (p: )M¤FH§@XXz]-pC M°-n¨D qyBqBWvB¤B§÷S
§N¤ 2004/06
Inductor Design Theory
4. ¤ p
1 > @qP§@Oo°u¤¤ ,]-p-n¨D¨¨§ @°T c ,q°PC 2 > @qP¤qe§í¨°W°T-t-±vT ,q¤pC 3 > @qPP-Po°°T ,q±`P-b 2mH ~ W±a¤°tXqeeq 50 mH¤§C
§N¤ 2004/06
§N¤ 2004/06
Inductor Design Theory
qP¤
,q±`qP]-pOH qPH¨B~cB§B~i¤°¤P ,qPi¤° : ~¤§@°XoI}lCb}q¤¤H¨~¤P @oiqP ( Common Mode Choke ) ±`oiqP \v]qP ( Normal Mode Choke ) ( Power Factor Correction - PFC Choke )
qX
,h¤¤¨¤P¤èV¤§q¤èC`q°s, 2,u-nO¨§
, ABB¨[¤WP ,T- u°éqPXG°s±`HL§§@C-Ybé¤J
§N¤ 2004/06
Inductor Design Theory
@H ,êuqy i1,b¤¤êuqX1,h¤¤qP
, ¤èV¤[±j ,¨¨C¤@u°éqP-°Wsb¨- XL = s L,] ,¤@ku °é@¤zZ±j§í¨§@C ,]-p¤]±`±`±NtP@§í¨qXb¤@°_ êEMIoi LBCX¨ ( p 2 ),] ,]-p¨oiqe¤j¤pH¤XwW§@XqP-¨MwC ¤¤L1B L2B C1c¨±`oi L1 L3 C 2 C 1 C 3 L2 ,L3B C2B C3c¨@oiC
§N¤ 2004/06
Inductor Design Theory
(1) ¤u§@-ìzp : X2 i1 A ~ B i2 i2 i1 X2 X1 OUT
X1 1 @qP§@
,k¤±whi,íbé¤J p,bP¤@¤W¤W¨¤èV¤u°é ABB¨[¤W¤ ,HT-Ptq,êuqy i2,b¤¤êu
§N¤ 2004/06
Inductor Design Theory
@qP¤§]-p¨BJ
:
Step 0 Step 1 Step 2 Step 3 Step 4 Step 5
SPEC¨ú±o: EMI¤\§O, ìmC qP-TwC core§÷è¤WTwC `¤u|TwC ú
§N¤ 2004/06