Electric machines consume more than 50% of the electricity generated by humans in modern society, and they have been widely used in robotics, industry, and transportation. This course provides a comprehensive understanding of electric machines, including their topologies, mathematical models, and operating principles. Students will learn about the latest design techniques and tools used in the engineering practice, as well as the key factors that influence the performance of electric machines. Additionally, the course also covers the knowledge of structural optimization, allowing students to develop and optimize electric machines for specific applications, with particular emphasis on robots and autonomous systems. By the end of the course, students will have a thorough concept of the design, modeling, and optimization of electric machines, enabling them to make informed decisions in developing novel electric machines for various applications.