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DESIGN OF PROTOTYPE DYNAMIC AC POWER MACHINE WITH EQUIVALENT CIRCUIT MODELING (TORQUE SPEED CURVE OF INDUCTION MOTOR 1,1, KW) Zainal Abidin; Adam Adam
Jurnal Media Elektro Vol 6 No 2 (2017): OKTOBER 2017
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (618.203 KB) | DOI: 10.35508/jme.v0i0.579

Abstract

Squirrel cage induction motors are widely used in electric motor drives due to their satisfactory mechanical characteristics (torque, current, overloading) and small dimensions, as well as their low price. When starting an induction motor, a large current is required for magnetizing its core, which results in a low power factor, rotor power losses and a temperature rise in the windings. None of these parameters should reach values beyond certain limits until the motor reaches nominal speed. The speed of an induction motor 1,1kW is affected very little by fluctuations of voltage. The greater the supply voltage of the motor, the induction motor's speed will increase. The torque values (Tstart, TSmax and Tmax) are affected by the value of the motor supply voltage: (Vp-nl : 132.8, Tstart1 : 7.4, T S-max1 : 0.4, Tmax1 : 9.9) V, (Vp-nl : 127.0, Tstart2 : 4.8, T S-max1 : 0.3, Tmax1 : 8.4) V and (Vp-nl : 121.3, Tstart3 : 3.3, T S-max3 : 0.2, Tmax3 : 7.1) V. Stator current (IL-nl ; 2.5, 2.2, 1.9 ) Amp rises gradually on account of the increase in magnetising current (Im : 2.5, 2.2, 1.9) Amp. The magnetising current required to produce the stator flux. The component of the stator current which provides the ampere-turns balancing the rotor ampere-turns will steadily diminish as the rotor current (IL-nl) decrease with the increase in rotor speed (nr).
PENGARUH PENAMBAHAN TAHANAN LUAR (RLUAR) TERHADAP TORSI MOTOR INDUKSI 3 PHASA JENIS ROTOR BELITAN DL 10120RHD3 Zainal Abidin
Jurnal Media Elektro Vol 6 No 1 (2017): April 2017
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/jme.v0i0.6197

Abstract

Karakteristik motor induksi sebagai penggerak ditentukan berdasarkan parameternya, yaitu : tahanan stator, tahanan rotor, reaktansi bocor stator, reaktansi bocor rotor, reaktansi magnetisasi dan tahanan inti besi. Nilai parameter tidak termuat dalam name plate motor dan nilai parameter dapat dicari dengan melakukan pengujian tahanan DC, pngujian beban nol (no load) dan pengujian rotor tertahan (block- rotor). Pengujian beban nol disimulasikan dengan memaksimalkan tahanan rotor, dimana slip mendekati nol (s = 0) dan pengujian rotor tertahan disimulasikan dengan menahan rotor tetap diam atau menimumkan nilai tahanan rotor, dimana slip bernilai satu (s = 1). Hasil pengujian, parameter motor induksi 3phasa DL 10120RHD3 dengan Tahanan Stator (R1) = 1,77 Ω, Tahanan Rotor (R2) = 0,42 Ω, Reaktansi stator (X1) = 3,51Ω, Reaktansi stator (X2) = 3,51Ω dan Reaktansi magnetik (Xm) = 58,95 Ω. Pengaruh penambahan Rluar mengakibatkan Tstart dan Slip mengalami kenaikan, dimana Rluar = 0 Ω, nilai Tstart = 5,85 Nm, Slip = 0,06 dan Rluar = 6 Ω, nilai Tstart = 43,13 Nm, Slip 0,88 dan Istart mengalami penurunan, dimana Rluar = 0 Ω, nilai Istart = 27,07 A dan Rluar = 6 Ω, nilai Istart = 18,80 A. Hasil pengujian dan perhitungan menunjukkan arah dengan karakteristik sama dengan nilai yang berbeda