Research On Permanent Magnet Synchronous Motor Control System Based On IRMCF341

Permanent magnet synchronous motors have no exciting current, high efficiency and power density in the rotor. But motion control of permanent magnet synchronous motors requires accurate position and velocity signals to accomplish field orientation. Optical encoders or rotary transformer are used for this purpose in conventional motion control systems. However, these additional sensors increase the costs of the system and reduce the reliability. With this background, the research based on the abolishment of these sensors to increase the reliability and decrease the costs is becoming popular.IRMCF341 is one single chip controller that contains the position sensorless control algorithm internally which is developed by International Rectifier Corporation. In the paper the position sensorless estimation algorithm of the rotor angle contained in the chip is researched. And the chip is applied in the drive control system of permanent magnet synchrotrons motor.According to the design the controller for PMSM with IRMCF341 motor controlling chip, carry out the following works.1) Deeply analyzed the mathematics model of PMSM in different coordinates and mutual conversion methods. Introduce the field orientation control principle and voltage space vector pulse width modulation (SVPWM) technology.2) Put forward the rotor position method of rotor magnet flux calculation with phase lock loop. First calculate stator magnet flux by stator voltage and current, then induct it to phase lock loop to get the estimated value of rotor's position and velocity. Also put forward improved method and error corrector which are for the problems such as DC offset and parameter change. Meanwhile, deeply analyze three steps start-up strategy which applied in this system.3) Build of experiment platform for position sensorless control drive system of permanent magnet synchronous motors. According to the methods above. Erect the experiment platform, and make use of the regulated controlling parameters for motor rotary speed, magnet flux and position errors to make the system satisfied with the design requirements.