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Fixed-Point Sampling Strategy for Estimation on Current Measurement Errors in IPMSM Drives.
- Source :
-
IEEE Transactions on Power Electronics . May2021, Vol. 36 Issue 5, p5748-5759. 12p. - Publication Year :
- 2021
-
Abstract
- Due to the unbalanced three-phase currents and the torque ripples and speed fluctuations to the drive caused by the current sampling errors of three-phase current sensors and corresponding signal processing circuits, the estimation on current sampling errors is of great importance to eliminate these adverse effects. The observer-based methods, however, present two defects: first, they could increase the computational burden to the drives, thus limiting their practical applications; second, their high dependence on the system speed or position feedback information might degrade the estimation accuracy. To solve these problems, this article proposed a fixed-point sampling method of lower branch flows and three phase-currents, which adopts the relations between the measured currents, rather than any complex algorithm, to estimate the current sampling errors. To coordinate with the proposed strategy, a fixed-point sampling scheme was accordingly rolled out. Compared with the observer-based methods, as a fixed-point one, much applicable to actual digital controllers, it could reduce the computational burden of the drive. Meanwhile, its effectiveness was verified by experimental results on a 1.5-kW IPMSM prototype, which showed accurate estimated current sampling errors and the effectively eliminated torque ripples and speed fluctuations. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SAMPLING errors
*MEASUREMENT errors
*SIGNAL processing
*PERMANENT magnet motors
Subjects
Details
- Language :
- English
- ISSN :
- 08858993
- Volume :
- 36
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Power Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 148380806
- Full Text :
- https://doi.org/10.1109/TPEL.2020.3031352