These lecture notes are prepared for the course ELEC-E8405 Electric Drives lectured at the Aalto University, Espoo, Finland. DC machine drives and surface-mounted permanent-magnet synchronous machine drives are considered. The course is taught during the first autumn of a Master's program as the first course on electric machine drives. The prerequisites for the course are basics of circuit theory and basics of control engineering, in addition to fundamental mathematics and physics. We aim to update and extend the notes gradually, including selected elements from the advanced course as well.