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Title: Analysis, design and control of permanent magnet synchronous motors for wide-speed operation
Keywords: PMSM, Flux-Weakening, Constant Power Speed Range, Response Surface Methodology, Space Vector Modulation
Issue Date: 9-Sep-2005
Citation: LIU QINGHUA (2005-09-09). Analysis, design and control of permanent magnet synchronous motors for wide-speed operation. ScholarBank@NUS Repository.
Abstract: This thesis presents aspects of analysis, design and control of permanent magnet synchronous motors (PMSMs) for wide-speed operations. An analytical method has been developed based on d- and q- axis equivalent circuit model of interior PMSMs, which is used to determine the influence of motor parameters and inverter power rating on motor output power capability. Response surface methodology (RSM) has been used to build the second-order empirical model for the estimation of motor parameters. The developed model by RSM provides an accurate description of effects of rotor geometric design on the motor parameters. The RSM models were then used for the optimization of an interior PMSM for wide speed operation. A prototype interior PMSM based on above optimization design was fabricated and tested to verify the design methodology. Space vector based direct torque control (SVM-DTC) has been proposed to overcome the difficulties met in the current vector control. The application of modified SVM-DTC for the prototype interior PMSM drive has been developed through analysis and experimental implementation. Compared to conventional current vector control, the proposed control scheme improves the dynamic response on speed and torque control on the wide-speed operation. The experimental results show modified SVM-DTC is more suitable for the applications on extended speed range for the prototype interior PMSM.
Appears in Collections:Ph.D Theses (Open)

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