2009Lect14

2009Lect14 - Slope ~ J1. fUJ A Ferromagnetic j...

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Unformatted text preview: Slope ~ J1. fUJ A Ferromagnetic j =~x21T[Rln(l((';oR~lr('J H -N / fi FlGU~E6.3~ The nonlinear relationship between magnetic flux density and magnetic eld intensity for a ferromagnetic core inductor. i I I j :" i i j ! i !: I : i i I I i I ! I I I I Hctl\Jw~ WeJne5 Jt{ ' f Oc--4. l , 2008 " C ': _ r/l air r/l core ?lcore NI .?l ai r FIGURE 6.35 An equivalent circuit relating core and air fluxes for a ferromagnetic core inductor. T2 I I I __ ..J ,--- (a) Common-mode choke ( !~ ICM Motor Driver ICM housing 1/ / / t 2ICM Loop area I: Cpa, / / / I Frame (b) I I I t AGURE 6.46 Illustration of (a) an H-drive circuit and (b) conversion of common-mode driver currents into differential-mode currents with a large loop area because of parasitic capacitance of the motor frame. ;__ !\'_OJ-'--(~I-~u-_+--j.. . i.' : i ! ~ I' I i I' ~! ) i I - ;... ',-- + .... ,' t : . ; , I 1 ; ! ' ,;! i ,I j I ' I I I .' :totfitJ(;trtidde!C[C ~i J if(P[iJ if'{ 1.. ~'JLP[fj)~Jtfe61S . ,'" j I . II! , I I' . I . 1-" , " . : ! : j' ,: t i I I' I : . ' ; i I I : ' ~ : ' ....
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2009Lect14 - Slope ~ J1. fUJ A Ferromagnetic j...

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