Lecture Notes # 3

# Lecture Notes # 3 - ECE847 WEEK 3 MIDTERM Friday March 2...

• Notes
• Pakistani
• 8

This preview shows pages 1–3. Sign up to view the full content.

ECE847 - WEEK 3 MIDTERM – Friday March 2, ENG102 Closed book. Four Questions Q1 (30%) - dc Motor Modeling Simulink model Transfer Function Q2 (25%) - Diode/SCR Rectifiers Simulink model Waveforms Q3 (25%) - Reference Frame Theory Transformation between 3Ø and 2 Ø and between different reference frames Q4 (20%) - dc motor speed control with current and speed feedback A number of small questions and/or Multiple choice. Try problems 1.5-1.9, pg.# 20-21 (course notes) 1.14 – DC Motor Speed Control (open loop control) Circuit Diagram an V cn V bn V 6 T 5 T a r AA L FF L dc V 2 T 1 T 3 T 4 T a e o o f V f r α V α a i f i

This preview has intentionally blurred sections. Sign up to view the full version.

Input and output variables of the rectifier α - input variable dc V - Output Variable an V , bn V , cn V - fixed magnitude and frequency (constant) avg dc V , = 2.34 α cos an V avg dc V , rms V 34 . 2 rms V 34 . 2 α o 180 o 90 Linearization Use a 1 cos function α α V 1 cos = 1 1 α V ( ) 1 1 34 . 2 cos cos 34 . 2 cos 34 . 2 1 , = = = α α α α V V V V V V V an an an avg dc = α V V
This is the end of the preview. Sign up to access the rest of the document.
• Fall '14
• ABC

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern