Tutorial study problems
ECEN 4797 assignment
- [30 pts] Additional proximity effect problem
- [30 pts] Additional inductor problem
- [20 pts] Text Problem 13.12 (short answers are sufficient)
- [50 pts] Text Problem 14.1
- [100 pts] Text Problem 15.1
ECEN 5797 assignment
- [30 pts] Additional proximity effect problem
- [30 pts] Additional inductor problem
- [20 pts] Text Problem 13.12 (short answers are sufficient)
- [50 pts] Text Problem 14.1
- [100 pts] Text Problem 15.1
- [100 pts] Text Problem 15.5
Notes:
- For an example of estimating core loss: see pp. 561 to 562 of the textbook (2nd edition).
- If you bought a (used) first printing of the second edition of the textbook, there is a typo in Problems 13.6 and 13.7. The problems should refer to Fig. 6.27 rather than Fig. 6.28. There is also an error on pp. 561-562 related to calculation of core loss. These typos were corrected in the second and subsequent printings. See the errata lists on the textbook website.
- For Problem 13.10:
- The core has negligible reluctance
- For part (b), you may either graphically estimate the answers using Fig. 13.31 or 13.32, or you may exactly evaluate the equations of Section 13.4.4. Don't be afraid of Eqs. (13.75) to (13.81): they aren't hard to evaluate with a calculator or spreadsheet
- For part (c): you may assume that every primary and secondary layer has the same dc resistance Rdc (i.e., every layer is wound with the same size wire).
- It is suggested that you read the example of Section 13.4.6.
- Solved sample problem: Problem 13.7
- For Problem 13.12: a short answer is sufficient.
RWE update 11/19/08