Electric Machines

Prentice Hall
Charles I. Hubert  
Total pages
October 2001
Related Titles

Product detail

Product Price CHF Available  
Electric Machines
296.90 approx. 7-9 days


For one/two-semester, undergraduate-level courses in Electrical Machinery.

Retaining the student-friendly style of the First Edition, this unique text fills a gap in the available Electronics and Computer Technology texts by devoting more time to current industrial requirements. It presents AC machines and transformers before DC machines, motors before generators, gives more attention to machine characteristics, and makes extensive use of NEMA standards and tables. The “self-contained” nature of each chapter gives instructors significant freedom in course development.


  • NEW - Additional example problems-104 example problems worked out in detail.
    • Allows students to see each step of the problem-solving process.

  • NEW - Section on high-efficiency motors.
    • Provides students with an updating and upcoming subject matter.

  • Clarity of expression.
    • Eases student understanding of key topics.

  • Sequence of topics.
    • Makes more efficient use of student/instructor time.

  • DC machines are presented in a stand-alone section.
    • Allows instructor to introduce DC machines at any time- allowing for significant freedom in course development.

  • More time is devoted to machine characteristics than armature windings.
    • Emphasizes current industry requirements and engineering applications.

  • NEMA and NEC standards-Introduced in the solution of application-type problems.
    • Allows both instructors and students to more easily discuss engineering practice with reference to NEMA and NEC standards and codes.

  • Professional references-Listed at the end of each chapter.
    • Encourages students to further research those topics that are of particular interest to them.

  • End-of-chapter review questions.
    • Helps students prepare for exams.

  • Summary of equations-Listed at the end of each chapter.
    • Guides students in the solution of chapter problems, and is a helpful reference for electrical power portions of professional engineering exams.

  • Problem Numbers-Keyed to chapter sections by a triple-number system.
    • Makes it easier for the instructor to assign homework problems, and easier for students to pick up additional problems for review.

  • Common core-Provides a common core of minimum essentials supplemented with optional material.
    • Assures students a basic understanding of electrical machines, while preparing them for the future.

  • Instructor's Manual.
    • Gives instructors detailed solutions to all problems, a common core of minimum essentials, optional topics, and suggested course outlines.

  • 276 homework problems.
    • Gives students ample opportunity to improve their problem-solving skills.

New to this Edition

  • Additional example problems-104 example problems worked out in detail.
    • Allows students to see each step of the problem-solving process.

  • Section on high-efficiency motors.
    • Provides students with an updating and upcoming subject matter.

Table of Contents

 1. Magnetics, Electromagnetic Forces, Generated Voltage, and Energy Conversion.

 2. Transformer Principles.

 3. Transformer Connections, Operation, & Specialty Transformers.

 4. Principles of Three-Phase Induction Motors.

 5. Classification, Performance, Applications, and Operation of Three-Phase Induction Machines.

 6. Single-Phase Induction Motors.

 7. Specialty Machines.

 8. Synchronous Motors.

 9. Synchronous Generators (Alternators).

10. Principles of Direct Current Machines.

11. Direct-Current Motor Characteristics and Applications.

12. Direct-Current Generator Characteristics and Operation.

13. Control of Electric Motors.


A: Balanced Three-Phase System.

B: Three-Phase Stator Windings.

C: Constant-Horsepower, Constant-Torque, and Variable Torque Induction Motors.

D: Selected Graphic Symbols Used in Controller Diagrams.

E: Full-Load Current in Amperes, Direct-Current Motors.

F: Full-Load Current in Amperes, Single-Phase Alternating-Current Motors.

G: Full-Load Current, Two-Phase Alternating-Current Motors (Four Wire).

H: Full-Load Current, Three-Phase Alternating-Current Motors.

I: Representative Transformer Impedances for Single-Phase 60 Hz Transformers.

J: Unit Conversion Factors.

Answers to Odd-Numbered Problems.


Back Cover

Here is what reviewers have to say about Electric Machines, Second Edition.

  • The topic organization is certainly unique. I like the concept of developing AC machines first, particularly starting with motors before generators. The practical application concepts and problems are particularly interesting.
  • We do need a machinery book with some NEMA standards and tables as found in Hubert's book. Because DC generators are internally AC generators, covering AC before DC is acceptable given a circuits course and knowledge of complex numbers as a prerequisite for this course.
  • The author's years of experience with machines has resulted in a clean, concise delivery of the text material enhanced by accompanying schematics, pictures, and sample problems.
  • I consider this text to be the best I have seen on the subject of electric machines. The writing style is very good, and the author has both practical and theoretical knowledge. I think this makes the text more believable to the students.
  • A good blend between the simple approach to machines found in some texts and the highly technical approach found in others. Among all the new texts I have seen over the past few years, this is the best.
  • I feel that the general order of topic coverage (transformers, AC machines, and DC machines) while different from the more usual order (DC, AC, transformers) is reasonable and in fact is the order that we have used in our courses for many years. Mr. Hubert's wealth of experience shows through and I am impressed with what I have read.
  • For the general market, the most attractive feature is the stand-alone character of the major sections of the book. The material is well written and the coverage is thorough. Review questions have been well chosen, and homework problems cover the material well. Example problems are appropriate, applicable, and well conceived.
  • When one is forced to teach such a course in one semester, one has to make choices on what to teach and on what to skip. In this respect, the author's decision to introduce AC machinery first and leave DC machinery as a standalone module provides some flexibility to the instructor on how to handle the material.

Instructor Resources