engr111Lab5Report

# engr111Lab5Report - internal resistance then the tolerance...

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ENGR 111B: Foundations of Electrical & Computer Engineering Lab 5: Pulse Width Modulation Team Members: Andrew Zeller Paul Boriack Section Number: 818 Team Number: 7 This Lab is due by the Beginning of the Next Lab Session. Written By: Hank Walker Lorne Liechty

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RESULTS: to be uploaded onto elearning.tamu.edu Straight Line Values Speed (ft/s) 1.14 Calculated R A (kΩ) 9.2 Calculated Duty Cycle (%) 91 Measured PWM Output Voltage (V) 6.98 Tweaked R A (kΩ) 9.5 Calculated Tweaked Duty Cycle (%) 95 Measured MWP Tweaked Output Voltage (V) 7.4 Table R1 CIRCLE RUN Calculated R A Resistance Corrected R A Resistance % Error Inside Wheel 6.849 Inside Wheel 7.143 4.2926 Table R2
REPORT: to be uploaded onto elearning.tamu.edu REPORT REQUIRMENTS Answer the following questions: - What are the pros and cons of the current limiting (via resistor) motor speed control method used in Lab 3? o The pros of the method used in lab 3 are that it is a more simple circuit that is still reliable. The con of the method used in lab 3 is that if the motors were close to the
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Unformatted text preview: internal resistance then the tolerance of the potentiometer could not be reached to make it go into a straight line-What are the pros and cons of the PWM motor speed control method? o The pros are that this method is much more accurate and reliable than the circuit in lab 3. The cons are that it is a more complicated circuit to build and extra care is needed to make sure the chips and transitor remain fully functional-What would be your recommendation and why, for which system to use if: o Your robot needed cheap and effective speed control. I would recommend the method used in lab 3 because of the fewer number of parts and easier reproduction of the circuit o Your robot was going to be used by NASA to explore Mars. I would recommend the circuit used in this lab if they were to put it in the land rover because the pwm method will allow nasa to control it better....
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• Spring '11
• multiple
• Motor speed control, Pulse-width modulation, duty cycle, Calculated Tweaked Duty, speed control method, MWP Tweaked Output

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engr111Lab5Report - internal resistance then the tolerance...

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