The permanent-magnet synchronous machine (PMSM) drive has emerged as a top competitor for a full range of motion control applications [1–3]. For example, the PMSM is widely used in machine tools, robotics, actuators, and is being considered in high-power applications such as vehicular propulsion and industrial drives. It is also becoming viable for commercial/residential applications. The PMSM is known for having high efficiency, low torque ripple, superior dynamic performance, and high power density. These drives often are the best choice for high-performance applications and are expected to see expanded use as manufacturing costs decrease. The purpose of this. | 12 Permanent-Magnet Synchronous Machine Drives Patrick L. Chapman Introduction University of Illinois Construction of PMSM Drive Systems at Urbana-Champaign Simulation and Model Controlling the PMSM Current-Based Drives Voltage-Based Drives Advanced Topics in PMSM Drives Introduction The permanent-magnet synchronous machine PMSM drive has emerged as a top competitor for a full range of motion control applications 1-3 . For example the PMSM is widely used in machine tools robotics actuators and is being considered in high-power applications such as vehicular propulsion and industrial drives. It is also becoming viable for commercial residential applications. The PMSM is known for having high efficiency low torque ripple superior dynamic performance and high power density. These drives often are the best choice for high-performance applications and are expected to see expanded use as manufacturing costs decrease. The purpose of this chapter is to introduce the PMSM and the application of power electronics technology to its control. The PMSM is sometimes referred to as a permanent-magnet AC PMAC machine or simply as a PM machine. In some instances it is referred to as a brushless DC BDC machine because by appropriate control it can be made to have input output characteristics much like a separately excited brush-type DC machine. It can also take on similarity with the DC machine when Hall effect sensors are utilized for position sensing whereby electronic instead of brush commutation take place. The BDC machine which is discussed in detail in Chapter 10 is a special case of the more general PMSM drive. The PMSM is a synchronous machine in the sense that it has a multiphase stator and the stator electrical frequency is directly proportional to the rotor speed in the steady state. However it differs from a traditional synchronous machine in that it has permanent magnets in place of the field winding and otherwise has no rotor conductors. .
