Kuliah 3 AC to DC Conversion Rectifier (terkontrol dan tidak terkontrol)

Materi: 3.1 Rangkaian Penyearah (rectifier)

Topologi: o Half-wave, o full-wave,

Catu daya: (power input): o satu fasa o tiga fasa

3.2 Rectifier performance 3.3 “Commutation” effect. 3.4 Line current issues

Line current distortion Neutral current

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

3.1 Ideal Rectifiers:

3.1.1 Definisi:

Mengubah tegangan AC dari sumber (PLN) menjadi daya dc menggunakan dioda daya atau dengan mengatur sudut penyalaan (firing angle) dari SCR atau controllable switch.

Blok diagram:

Gambar 3.1 Blok diagram rectifier

Aplikasi:

DC welder,

DC motor drive,

Battery charger,

DC power supply,

HVDC (high voltage dc)

3.1.2 Satu fasa dengan beban R A. Half wave (½ gelombang)

A.1 Tidak terkontrol (Fixed dc output)

(a) Rangkaian (b) gelombang

Gambar 3.2 Penyearah dioda setengah gelombang dengan beban R

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Tegangan keluarannya:

dc tidak dapat dikontrol (besarnya tetap) ada ripple (riak) pada gelombang keluarannya:

o Vo(rms) muncul o praktis ripple yang dijinkan untuk tegangan:10%,

arus: 5%. o perbaikan ripple dengan filter kapasitor

Berdasarkan Gambar 3.2b

Persamaan tegangan dc keluarannya

Persamaan tegangan rms keluarannya:

A.2 Terkontrol (regulated dc output)

(a) Rangkaian (b) Gelombang

Gambar 3.3 Penyearah SCR ½ gelombang dengan beban R

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Tegangan keluarannya: dc dapat dikontrol/regulated (besarnya dapat diubah) ada ripple (riak) pada gelombang keluarannya:

o Vo(rms) muncul o praktis ripple yang dijinkan untuk tegangan:10%,

arus: 5%. o perbaikan ripple dengan filter kapasitor

Berdasarkan Gambar 3.3b

Persamaan tegangan dc (rata-rata) keluarannya:

Persamaan tegangan rms keluarannya:

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

B. Half wave dengan Beban R-L B.1 Tidak terkontrol

Gambar 3.4 Penyearah dioda ½ gelombang dengan beban RL Berdasarkan Gambar 3.4, diperoleh:

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.

Generated by Foxit PDF Creator © Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.