Abstract
The output torque is the control objective of PMSM (Permanent Magnet Synchronous Motor) in urban rail train traction system. The commonly used torque control methods are affected by the variation of motor inductance parameters, which reduces the torque control precision. Based on mathematical model of PMSM extended flux, a minimum order state observer is established in this paper. Stator flux is got by extended flux observation. Then feedback troque is caculated by stator flux and currents, which is not affected by the inductance parameters variation. Limited by pole assignment of the flux observer, the torque calculation method based on inductance identification is adopted in motor start-up stage and switch to flux observation method in follow-up stage. Double current regulators control is used when the motor speed is not special high, and voltage phase method is used as flux-weakening control when stator voltage is limited on six-step operation. Thus, a torque close-loop vector control scheme based on flux observation in whole speed range is given out, which is verifid by simulation and experiment on a 300kW PMSM platform.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
