Abstract
Recently, a maximum torque per ampere (MTPA) control method based on virtual signal injection has been proposed for interior permanent magnet synchronous machine (IPMSM) drives. However, the traditional virtual signal injection MTPA control has the problems of static error or poor dynamic performance. In addition, the application of virtual signal injection method in permanent magnet assisted synchronous reluctance motor (PMa-SynRM) drives is rarely reported. Therefore, this paper proposes an improved MTPA control strategy with virtual constant signal injection for the PMa-SynRM drives. Based on the improved MTPA control law, the current reference value of the constant parameter is obtained in advance, and then the synthetic torque is generated by injecting virtual constant signal directly into the d-axis and q-axis currents. The derivative of torque with respect to current angle is extracted through simple linear operation, and then the q-axis current correction value is obtained when motor parameters change. This method avoids the use of filter. The simulation results show that the response time of the proposed method is shortened from 800ms of the virtual sinusoidal signal injection method to about 50ms when the load changes suddenly, and there is no steady-state error of the virtual square wave signal injection method.
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.
