Lab 5_TimeProportioningControl LAB

.docx

School

ECPI University *

*We aren’t endorsed by this school

Course

220

Subject

Industrial Engineering

Date

Jan 9, 2024

Type

docx

Pages

11

Uploaded by PrivateElement11067 on coursehero.com

EET 220 Industrial Applications Professor D. Overbye Week 3 Lab 5 “Time Proportioning Control” By: Deandre Wheelington ECPI University I pledge to support the Honor System of ECPI. I will refrain from any form of academic dishonesty or deception, such as cheating or plagiarism. I am aware that as a member of the academic community it is my responsibility to turn in all suspected violators of the honor code. I understand that any failure on my part to support the Honor System will be turned over to a Judicial Review Board for determination. I will report to a Judicial Review Board hearing if summoned. Name Deandre Wheelington Date: 24 Nov 23
Abstract: In this lab, we will be demonstrating how to control the average voltage/power delivered to an op-amp load using a method known as “time-proportioning”. We will also measure the duty cycle of our output Pulse Width Modulated (PWM) signal using an oscilloscope and a formula. Introduction: We will first focus on building the circuit in this lab using multisim. Once the circuit is built, we will open up the oscilloscope window. We will run the simulation at different loads of resistance by using our adjustable potentiometer and record our values below in a table. The values needed to be recorded are the “On time” or the time that our load was on before it started another duty cycle, the entire duty cycle time, and finally, the measured output voltage during the set potentiometer value. We will find these values in our tables using given formulas down below.
Lab 5: Time Proportioning Control Objectives: After performing this experiment, you will be able to: 1. Control the average voltage/power delivered to the load using Time proportioning method. 2. Measure the duty cycle of the Pulse Width Modulated (PWM) signal. Procedure: 1. Construct the following circuit using multisim. VCC 10V R2 10kΩ Key=A 0 % U1 741 3 2 4 7 6 5 1 V1 5Vpk 60Hz 0° XSC1 A B Ext Trig + + _ _ + _ VCC 10V Offset = 5V Figure 1: Time proportioning circuit 2. Set the potentiometer to 0% and Run the simulation. Observe the oscilloscope; you should be able to see a positive DC voltage because the op-amp is saturated. Means the voltage at the non- inverting terminal is greater than the inverting terminal. 3. Measure the dc output voltage using the voltage probe at pin 6. Record the result in table 1 below under output voltage.
4. Set the potentiometer to 10%; you should be able to see the following waveform. Figure 2: Measuring ON time of the pulse 5. Place the cursors 1 and 2 at the beginning and ending of the pulse as shown above. 6. Observe the value of T2-T1, which gives the ON time of the pulse. Record the result in the table 1 below under ON time (t ON ). Potentiometer setting ON Time (t ON ) Duty cycle Output Voltage 0% N/A 100% 9.12 V
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help