inversor_laminas.pdf

7/22/2019 inversor_laminas.pdf

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Sw + V DC V DC 0

T / 2

V rms =

1

T T

0

V 2DC dt = V DC


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Sw1 Sw3 + V DC Sw2 Sw4 V DC Sw1 Sw2 0Sw3 Sw4 0


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+ V DC V DC 0

+ V DC

V DC


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V rms = V DC 2aT

a = T / 2 2x


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V rms = V DC 1 4xT

v(t) =

n =1 ,2 ,3 ,

C n sin(nt )

C n = 4

T T

2 x

xV DC sin(nt ) dt =

8V DC

nT cos (nx )

x

x


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0

t

T

2

i(t) = V 1R

1 et I min e

t

T 2

t

T

i(t) = V 1R

e( t T 2 )

1 + I max e( t T 2 )

|I max | = |I min | = V 1R1 e T 2 1+ e T 2


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V rms = 2T

T 2

0V 21 dt = V 1

v(t) =

n =1 ,3 ,5 ,

4V 1n

sin2nt

T

n

i(t) =

n =1 ,3 ,5 ,

4V 1n

1Z n

sin2nt

T n


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Z n = R2 + ( nL )

2

n = arctannL

R

T HD = v21

4 V 1

n

2

4 V 1n

= 0 ,48343


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1ra

P 1 = 4V 1

R 2 + ( L)22

R


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2/ 3

a,b,c

a,c,b


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vab (t) +vbc (t) + vca (t) = 0


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vab (t) =

n =1 ,3 ,5 ,

4V DC n cos

n6 sin n t +

6

vbc (t) =

n =1 ,3 ,5 ,

4V DC n

cosn6

sin n t 2

vca (t) =

n =1 ,3 ,5 ,

4V DC n

cosn6

sin n t 76

V rms = 23V DC


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T HD = V 2rms V 2rms 1V rms 1 = 0 ,31084


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vfn = 23 1 ej 2 3 ej 4 3va (t)vb(t)

vc(t)

= v (t) + jv (t)

vll = 23 1 ej 2 3 ej 4 3vab (t)vbc (t)vca (t)

= 1 ej4 3 vfn

vll = 3 ej 6

vfn


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Swa Swb Swcvfn

0 0 0 0

0 0 1 23 V DC ej 30 1 0

23 V DC e

j 3

0 1 1 23 V DC 1 0 0 23 V DC 1 0 1

23 V DC e

j 3

1 1 0 23 V DC ej 3

1 1 1 0


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e (vfn ) = 23 va (t) 12 (vb(t) + vc(t))

va (t) + vb(t) + vc(t) = 0 va (t) = (vb(t) + vc(t))

va (t) = 23 e (vfn ) vb(t) = 23 e vfn ej 4 3


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V n, ln = 2V DC

3n2 + cos n

3 cos n3 n = 1 , 5, 7, 11, 13, . . .


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vfn = ke + [Z ( p) M ( p)] i

vfn =

2

3 1 ej

2 3 ej

4 3

Swa Swb Swc

t V DC

e = 23

1 ej2 3 ej

4 3 v1 (t) v2 (t) v3 (t)

t


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kY Z Y ( p) M Y ( p) k Z ( p) M ( p) 1 R 0 e

j 6

3R3 0

1 Lp Mp ej 6

3L3 p

M 3 p

1 1Cp

0 ej 6

31

3 Cp 0


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60 223 mH 100 V


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P W M

P W M T HD

P W M

P W M

P W M


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P W M

+ V DC V DC + V DC V DC 0

P W M


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P W M

m f = f portadoraf referencia

P W M


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m a =

V pico referenciaV pico portadora

m a 1 P W M m a

V rms 1 = 2m a V DC

P W M ma ma


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P W M

m f = 12 ma = 0 ,5


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SPWM

[0, / 3] [2/ 3, 4/ 3] [5/ 3, 2] [/ 3, 2/ 3] [4/ 3, 5/ 3]

1ra P W M


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SPWM


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SPWM


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SPWM


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P W M


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vref (t) = 1 ,15 sin(t) + 0 ,27 sin(3t) 0,029 sin(9t)


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P W M


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m f


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m f = 15


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P W M


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m f = 21


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P W M


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m f = 27 .


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P W M


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/ 9


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P W M


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P W M

V rms V rms 1 THD V rms V rms 1 T HD

SPWM


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V DC V DC


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i(t) = sin(2 f t ) R = 60 L = 223 mH f = 60Hz V DC = 100 V


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inversor_laminas.pdf

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