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  • June 2020
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Spanningsvormen en vermogen

1

EMDS

Micro and Nano Scale Engineering

Zuivere gelijkspanning Zuivere gelijkspanning

1

U in volt

0.8

+

0.6

0.4

0.2

0

0

10

20

30

40

50 tijd in s

60

70

80

90

100

2

EMDS

Micro and Nano Scale Engineering

1

Veranderlijke gelijkspanning +

Veranderende gelijks panning 5

4.5

4

3.5

U in volt

3

2.5

+

2

1.5

1

0.5

0

0

10

20

30

40

50 tijd in s

60

70

80

90

100

3

EMDS

Micro and Nano Scale Engineering

Zuivere wisselspanning Zuivere wisselspanning 1.5

1

+ U in volt

0.5

0

-0.5

-1

-1.5

0

10

20

30

40

50 tijd in s

60

70

80

90

100

4

EMDS

Micro and Nano Scale Engineering

2

Periodetijd en frequentie f =

T

1

0.8

1 T

U in volt

0.6

ω = 2π ⋅ f

0.4

0.2

0

-0.2

0

10

20

30

40

50 tijd in s

60

70

80

90

100

5

EMDS

Micro and Nano Scale Engineering

Gemiddelde waarde T

U gem

1 = ∫ U (t )dt T 0

6

EMDS

Micro and Nano Scale Engineering

3

Effectieve waarde T

U eff

1 2 (t )dt = U ∫ T 0

7

EMDS

Micro and Nano Scale Engineering

Fase van een AC-signaal A loopt 36 graden voor op B

1 0.8

B

0.6 0.4

ϕ = 36 O =

U in volt

0.2

A

0

π 5

U (t ) = sin(ωt + ϕ )

-0.2 -0.4 -0.6

ϕ = 36O =

-0.8 -1

0

10

20

30

40

50 tijd in s

60

70

80

90

π 5

100

8

EMDS

Micro and Nano Scale Engineering

4

Decibel • Verhoudingsgetal • Origineel voor vermogens • Voor spanningen over dezelfde weerstand: V  dB = 20 ⋅ log10  2   V1 

9

EMDS

Micro and Nano Scale Engineering

5

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