The chapter begins with a description of the scalar control of PMS motors. The fundamentals of PMS motor vector control (VC) are then presented with an eye on the analogy with DC motor operating principles. The VC of surface-mounted permanent magnet pole motors and interior permanent magnet (IPM) motors are presented in various reference frames. Current and voltage operating limits are incorporated into the control systems. Flux control modes of operation of PMS motors together with the corresponding control means in different reference frames are also presented in detail, as a particular feature of this book. These include maximum torque per ampere (MTPA) control, maximum torque per voltage control, and unity power factor control. Finally, loss minimization control by offline and online strategies is elaborated after presenting the method of motors loss reduction and the PMS motor loss modeling.