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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Specht, A. Ober-Blobaum, S. Wallscheid, O. Romaus, C. Bocker, J. |
| Copyright Year | 2013 |
| Description | Author affiliation: Power Electron. & Electr. Drives, Univ. of Paderborn, Paderborn, Germany (Specht, A.; Wallscheid, O.; Romaus, C.; Bocker, J.) || Dept. of Math., Univ. of Paderborn, Paderborn, Germany (Ober-Blobaum, S.) |
| Abstract | Interior permanent-magnet synchronous motors (IPMSM) are widely used as automobile traction drives for electric and hybrid electric vehicles. Since motor control is commonly implemented on a digital platform, a discrete-time motor model is needed. With respect to the calculation effort the discretization is usually done via a first-order explicit Euler approximation within the rotor frame coordinates. For IPMSM traction drives this approach is leading to a systematic modeling error, since the flux trajectory degenerates from a circle to a polygon at higher speeds. Consequently, this approach leads to a speed-depending discretization error, which can have a significant impact on control performance. Hence, this contribution presents a discrete-time model of an IPMSM based on variational integrators (VI). Starting with a variational principle the Euler-Lagrange equations provide a physical continuous-time motor model. By applying a discrete version of the variational principle we receive a symplectic discrete-time IPMSM model without increasing the calculation effort in comparison to the classical Euler discretization. Simulative as well as experimental investigations confirm the benefit of a VI based discrete-time motor model concerning the transient and stationary system model accuracy. |
| Sponsorship | IEEE Ind. Electron. Soc. |
| Starting Page | 1411 |
| Ending Page | 1417 |
| File Size | 489496 |
| Page Count | 7 |
| File Format | |
| ISBN | 9781467349758 |
| e-ISBN | 9781467349741 |
| e-ISBN | 9781467349734 |
| DOI | 10.1109/IEMDC.2013.6556322 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-05-12 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Mathematical model Equations Rotors Approximation methods Traction motors Permanent magnet motors Computational modeling |
| Content Type | Text |
| Resource Type | Article |
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