lab 2 847 - RYERSON UNIVERSITY DEPARTMENT OF ELECTRICAL...

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RYERSON UNIVERSITY DEPARTMENT OF ELECTRICAL ENGINEERING LAB REPORT For ELE847 Advanced Electromechanical Systems Experiment No 2: DC Motor Speed Control EXPERIMENTERS: - Fizza Marium (500394409) - Yuqi Huang (500395605) Date of Experiment: October 1 st , 2013 Date of Submission: October 8 th , 2013 Objective: To build and simulate Simulink models for Dc motor speed control and to investigate the characteristics of all schemes
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Abstract: We used three methods during this lab which were open loop, current feed feedback loop, and current and speed feedback loops. Feedback is a signal that is looped back to control a system within itself. In a closed loop control with current feedback, current is feedback to input. The current feedback allows controlling the stability of current. The current feedback loop uses a PI integral controller to feedback the current; it has steady current and torque output and a linear speed output. Unfortunately, the steady state motor speed cannot be controlled and thus, provides a flaw in this configuration. This configuration provides assurance that it is the best design out of the three as it allows control over both the current and the motor speed.
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Theory: There were three types of motor speed controls which we examined during this lab. They are as follows: Motor Speed Control (Open Loop) Closed Loop Control with Current Feedback Closed Loop Control with Current and Speed Feedback. The Motor Speed Control mainly consists of a thyristor rectifier connected to a DC motor. The main purpose of a motor speed controller is to take a signal representing the demanded speed, and to drive a motor at that speed. The controller may or may not actually measure the speed of the motor. If it does, it is called a Feedback Speed Controller or Closed
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