BEndicott_Week_1_iLab_1.docx - Lab 1 \u2013 Power Supplies By Benjamin Endicott ECT246 Electronic Systems III with Lab Gary House DeVry University Online

# BEndicott_Week_1_iLab_1.docx - Lab 1 – Power Supplies By...

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Lab 1 – Power Supplies By Benjamin Endicott ECT246 Electronic Systems III with Lab Gary House DeVry University Online 5/11/14 Part A-Power Supplies
TCO #1: Given an application requiring an AC to DC regulated power supply discuss the block diagram of the supply, and how its internal subsystems are related, using the appropriate data sheets, determine the device’s operating parameters, calculate, simulate and measure the power supply’s electrical parameters. This week you will build a regulated power supply. Each subsystem - transformer, bridge rectifier, filter and voltage regulator is examined and the voltages and waveforms are analyzed. You will troubleshoot the system for failures and write a short report. CAUTION: You are working near 115V ac voltage. Be very careful and if you have any questions, ask the professor before proceeding. A. Draw and discuss the subsystems of an ac to dc regulated power supply. a. Draw and label each of the subsystems of a regulated power supply. b. Describe briefly the purpose of each subsystem. Power Jack - where the input voltage enters the circuit. Bridge rectifier - converts the alternating current into direct current. Capacitor - levels the voltage. Resistor - limits the amount of current going through the circuit so that it is at the safe level limit. Jumpers and Test points - used when tested the circuit.
B. Use a bridge rectifier’s data sheet to determine its operating parameters. a. Using the data sheet for a W04M or similar device, determine and record the pin configuration and maximum operating characteristics. Package Drawing and Pin Configuration: Maximum Ratings and Electrical Characteristics: Peak Repetitive Reverse Voltage ( RRM V ): __________400 V RMS Reverse Voltage ( ( ) R RMS V ): __________ 280 V Average Rectified Output Current ( O I ): _________ 1.5 A
Forward Voltage ( FM V ): _________1.0 V C. Given a full-wave bridge rectifier schematic, calculate the RMS and peak-to-peak output voltage of the transformer’s secondary. Draw and label the time domain output waveform of the transformer’s secondary side. Use the schematic to simulate the circuit. Record the transformer’s primary, secondary voltages and the dc load voltage. Record the input and output waveforms of the bridge. Compare the simulated results to the calculated values. Schematic: a. Use the schematic to determine or calculate the following values: ( ) P pk V : _________120 V ( ) S pk V : __________ 12 V ( ) L pk V : __________ 9.30 V
ave V : __________ 5.921 V b. Draw and label the input and output waveforms of the bridge. c. In Doc Sharing, use “Select View” and go to Week 1. Download the Multisim PS1.ms Multisim file or create the circuit. Run the simulation and record the following: ( ) P pk V : __________120 V ( ) S pk V : __________ 12 V ( ) L pk V : __________ 9.30 V ave V : __________ 5.921 V d. Use the oscilloscope to view the input and output waveforms of the bridge. Copy and paste the waveforms below.
D.

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