Current control for IPMSM drives: Direct discrete-time pole-placement design
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School of Electrical Engineering |
A4 Artikkeli konferenssijulkaisussa
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Date
2015
Major/Subject
Mcode
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Language
en
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9
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Abstract
This paper deals with discrete-time models and current control methods for synchronous motors with a magnetically anisotropic rotor structure, such as interior permanent-magnet synchronous motors (IPMSMs) and synchronous reluctance motors (SyRMs). Dynamic performance of current controllers based on continuous-time models is limited, especially if the ratio of the sampling frequency to the fundamental frequency is low. An exact closed-form hold-equivalent discrete motor model is derived. The zero-order hold of the stator-voltage input is modeled in stationary coordinates, where it physically is. An analytical discrete-time pole-placement design method for a two-degree-of-freedom state-space current controller with an integral action is proposed. The proposed method is easy to apply: only the desired closed-loop bandwidth and the three motor parameters (R_s, L_d, L_q) are required. The robustness of the proposed current control design against parameter errors is analyzed. The controller is experimentally verified using a 6.7-kW SyRM drive.Description
Keywords
Current control, delay, discrete-time model, interior permanent-magnet synchronous motor (IPMSM), synchronous reluctance motor (SyRM), zero-order hold
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Citation
Hinkkanen, Marko & Qu, Zengcai & Awan, Hafiz Asad Ali & Tuovinen, Toni & Briz, Fernando. 2015. Current control for IPMSM drives: Direct discrete-time pole-placement design. IEEE Workshop on Electrical Machines Design, Control and Diagnosis (WEMDCD). 9. ISBN 978-1-4799-8900-3 (electronic). DOI: 10.1109/wemdcd.2015.7194524.