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Elektronika DayaTEL 12043

OlehAhmad Faisal, ST, MT

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HALF‐WAVE RECTIFIER WITH RESISTIVE‐INDUCTIVE LOAD AND FREEWHEELING DIODE

Introduction to Power Electronics by DMZ

RencanganPembelajaran

Semester (RPS)Sem. B ta 2018/19

Jadwal Kandungan Jam

Minggu-1 Pengenalan

Senin (13.00-14-40 wib) R. II.1

Rabu (17.00-18.30 wib) R. A.II.3

Minggu-2 Rectifier ½ gel Beban R

Minggu-3 Rectifier ½ gel Beban RL

Minggu-4

Penyearah setengahgelombang beban resistif daninduktif dan diodefreewheling

Minggu-5Penyearah gelombang penuhbeban resistif

Minggu-6 DC-DC konverter

Minggu-7 Sejarah power supply

Minggu-8 Ujian tengah semester

Minggu-9 Buck converter

Minggu-10 Boost converter

Minggu-11 Manajemen thermal

Minggu-12 AC- AC konverter

Minggu-13 PE Curve

Minggu-14 SEPIC Converter

Minggu-15 Pengurusan energi dan daya

Minggu-16 Ujian Akhir

Tugas 1 Tugas 2

Learning Outcomes

Introduction to Power Electronics by DMZ

• To understand the operation and characteristics of rectifiers.

• To understand the performance parameters of the rectifiers.

• To learn techniques for analyzing the rectifier circuit.

• To learn techniques for designing the rectifier circuit.

AC‐DC Converter with RL Load and Freewheeling Diode

Introduction to Power Electronics by DMZ

(a) Half-wave rectifier with freewheeling diode(b) Equivalent circuit for Vs > 0(c) Equivalent circuit for Vs < 0.

Introduction to Power Electronics by DMZ

• For a positive source voltage, Vs > 0– D1 is on.– D2 is off.– The equivalent circuit is the same as that (b).– The voltage across the RL load is the same as the

source .• For a negative source voltage, Vs < 0

– D1 is off.– D2 is on.– The equivalent circuit is the same at that of (c).– The voltage across the RL load is zero.

AC‐DC Converter with RL Load and Freewheeling Diode

Introduction to Power Electronics by DMZ

• Since the voltage across the RL load is the same as the source voltage when the source is positive and is zero when the source is negative, the load voltage is a half‐wave rectified sine wave.

AC‐DC Converter with RL Load and Freewheeling Diode

Introduction to Power Electronics by DMZ

• When the circuit is first energized, the load current is zero and cannot change instantaneously.

• The current reaches periodic steady state after a few periods (depending on the L/R time constant).

AC‐DC Converter with RL Load and Freewheeling Diode

Introduction to Power Electronics by DMZ

• Steady-state load, source, and diode currents

AC‐DC Converter with RL Load and Freewheeling Diode

Introduction to Power Electronics by DMZ

Ex1

Introduction to Power Electronics by DMZ

• Determine the average load voltage and current, and determine the power absorbed by the resistor in the circuit, where R =2 ohm and L = 25 mH, Vm is 100 V, and the frequency is 60 Hz.

Solution Ex1

•

• adalah tegangankeluaran rata-rata

•

• Impedansi = Z = R+jωL• ω = 2x3.14x 60 = 376,8 • =

= 9,63 Ohm

•,

,

• Irms = Io = 3,307 A

Introduction to Power Electronics by DMZ

0π 2π 3π

Vm

ω

• Daya diserap beban• P = Irms

2R = 3.3072x 2= 21,87 Watt

Ex1

Introduction to Power Electronics by DMZ

Summary

Introduction to Power Electronics by DMZ

• Uncontrolled Half-wave rectifier with RL load and Freewheeling diode

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