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RANGKAIAN ELEKTRIK I

RANGKAIAN ELEKTRIK I. Oleh : Ir. Hery Purnomo, MT. Rangkaian arus bolak-balik. Gelombang sumber tegangan. DC. Baterai. AC. Genset. Pembangkit listrik (Generator AC). Penemu Peralatan arus bolak-balik (gel. sinusoida). Nikola Tesla. Thomas Edison. George Westinghouse.

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RANGKAIAN ELEKTRIK I

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  1. RANGKAIAN ELEKTRIK I Oleh : Ir. Hery Purnomo, MT Rangkaian arus bolak-balik

  2. Gelombang sumber tegangan DC Baterai AC Genset

  3. Pembangkit listrik (Generator AC)

  4. Penemu Peralatan arus bolak-balik (gel. sinusoida) Nikola Tesla Thomas Edison George Westinghouse

  5. Persamaan gel. sinusoida

  6. v(t)  Vm sin(t  )

  7. v2 v1 V2 mendahului(leading) terhadapV1 V1 terbelakang (laging) terhadapV2

  8. Sebutkan kedudukan gelombang tegangan

  9. Gelombang tegangan dan arus Arus (i) mendahului tegangan (v) dengan beda fasa Φ

  10. Tuliskan persamaan gelombangnya

  11. Radians Degree Sinusoida: perubahan sudut π = 3.142

  12. Gelombang air laut SINUSOIDA ….??

  13. Nilai rata-rata Gelombang sinusoida

  14. Nilai efektif / rms gel. sinusoida

  15. Nilai efektif gel. sinusoida Peak = 163 V RMS = 115 V Vrms = 0,707 x 163 = 115

  16. Catatan : • Tegangan Tegangan sesaat : v(t) Tegangan maksimum/puncak : Vm Tegangan efektif/rms : Vef = Vrms= V • Arus Arus sesaat : i(t) Arus maksimum/puncak : Im Arus efektif/rms : Ief = Irms = I

  17. Pemakaian nilai efektif • Sumber tegangan Jala-jala (PLN), selalu menggunakan tegangan efektif misal : tegangan 220 V atau 380 V, 50 Hz • Peralatan listrik, tegangan yang tercantum pada papan nama adalah tegangan efektif. • Peralatan ukur (voltmeter, ampermeter), menunjukkan nilai efektifnya

  18. Problem Dari hasil pengukuran tegangan Jala-jala PLN, dengan voltmeter = 230 volt Hitung tegangan sesaat (instantaneous voltage) :

  19. CONTOH (1) A sinusoidal current has a maximum amplitude of 20A. The current passes through one complete cycle in 1 ms. The magnitude of the current at zero time is 10A. a) What is the frequency of the current in Hz? b) What is the value of the angular frequency? c) Write the expression for i(t) in the form Im cos(ωt + ). d) What is the rms value of the current?

  20. CONTOH (2) A sinusoidal voltage is given by the expression v = 300cos(120t + 30o) a) What is the frequency in Hz? b) What is the period of the voltage in milliseconds? c) What is the magnitude of v at t = 2.778 ms? d) What is the rms value of v?

  21. Goal Kapan tercapai ??

  22. TERIMA KASIH

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