同步電機矢量控制

other forms of motor， permanent magnet synchronous motor （PMSM） has better dynamic performance， smaller size and higher efficiency. In recent years， with the rapid development of electric power electronics technical， rare earth permanent magnetic materials and the increasingly sophisticated research in permanent magnet motor. PMSM is widely used in national defense， agriculture and daily lifeYl PMSM is a multivariable， nonlinear and high coupling system. The output torque and stator current present a complicated function relation. Magnetic field can be decoupled to get a good control performance： It was no slip frequency current， less affected by the rotor parameters， easier to implement vector control. Therefore， the model of PMSM vector control has become a widespread concern. This paper analyzes the mathematical model of permanent magnet synchronous motor based on the use of powerful simulation with Matlab modeling capabilities.

In the Matlab / Simulink to create a simulation model of PMSM control system can be provide effective means and tools for analysis and design of the servo control system. II. PMSM MATHEMATICAL MODEL A. Basic Model The permanent magnet synchronous motor mainly from stator and rotor two part constitute. Three-phase stator windings produce a rotating magnetic field through the three-phase AC. Rotor is usually equipped with high-performance permanent magnet in surface or inside of ferromagnetic materials. Such as neodymium iron boron or rare earth magnetic materials to obtain a strong magnetic field， etc. And the rotor magnetic field to distribute for the sine or look like a sine wave form. The interaction between the stator and rotor magnetic field generated torque when the stator three-phase inverter with access to electricity generated in the motor rotating magnetic field. Then the 978-1-4244-5540-9/10/$26.00 ?2010 IEEE 539 Jiao Shu Postgraduate of electric power system and automation profession of Nan Chang university. Nanchang， Jiangxi， 330031， China shujiao _1987@163.com torque push synchronization of the rotor to the stator magnetic field rotation speed to achieve the purpose of frequency control. In order to facilitate analysis， the motor to make the following assumptions： the stator winding three-phase symmetrical， uniform air gap， ignoring the end effect; neglected magnetic saturation and iron loss ，magnetic circuit is linear; converter provides an ideal three-phase power， ignoring higher harmonics ; ignore the rotor shaft friction.