Details
| Original language | English |
|---|---|
| Title of host publication | 2018 IEEE 9th International Symposium on Sensorless Control for Electrical Drives (SLED) |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 60-65 |
| Number of pages | 6 |
| ISBN (electronic) | 9781538644553 |
| Publication status | Published - 2018 |
| Event | 9th IEEE International Symposium on Sensorless Control for Electrical Drives, SLED 2018 - Helsinki, Finland Duration: 13 Sept 2018 → 14 Sept 2018 Conference number: 9 |
Publication series
| Name | Symposium on Sensorless Control for Electrical Drives |
|---|
Abstract
As the back electromotive force (back-EMF) scales with the rotor speed of the permanent magnet synchronous machine (PMSM), this generally results in a low-speed limit for back-EMF based rotor position estimation. As shown in [1], this low-speed limit is primarily determined by the inverter's nonlinearity effects which are significantly caused by the inverter's dead-time [2]. With decreasing rotor speed, the modulation index of the inverter is reduced and the relative voltage error due to the inverter's dead-time effect increases compared to the machine's back-EMF. Therefore, the aim of this paper is to show that the low-speed limit can be significantly reduced when a back-EMF based rotor position estimation method is combined with a highly accurate and dynamic dead-time compensation using FPGA-operated current oversampling. For the experimental results the rotor position estimation [3] is combined with the predictive dead-time compensation [4]. The results demonstrate a significant reduction of the low-speed limit to a rotor speed that is about 0.5% of the rated speed.
Keywords
- current oversampling, Dead-time compensation, Sensorless control
ASJC Scopus subject areas
- Engineering(all)
- Electrical and Electronic Engineering
- Engineering(all)
- Mechanical Engineering
- Mathematics(all)
- Control and Optimization
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2018 IEEE 9th International Symposium on Sensorless Control for Electrical Drives (SLED). Institute of Electrical and Electronics Engineers Inc., 2018. p. 60-65 (Symposium on Sensorless Control for Electrical Drives).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Reducing the Low-Speed Limit for Back-EMF Based Self-Sensing Speed Control by Using an FPGA-Operated Dead-Time Compensation
AU - Lindemann, Georg
AU - Weber, Bastian
AU - Mertens, Axel
N1 - Conference code: 9
PY - 2018
Y1 - 2018
N2 - As the back electromotive force (back-EMF) scales with the rotor speed of the permanent magnet synchronous machine (PMSM), this generally results in a low-speed limit for back-EMF based rotor position estimation. As shown in [1], this low-speed limit is primarily determined by the inverter's nonlinearity effects which are significantly caused by the inverter's dead-time [2]. With decreasing rotor speed, the modulation index of the inverter is reduced and the relative voltage error due to the inverter's dead-time effect increases compared to the machine's back-EMF. Therefore, the aim of this paper is to show that the low-speed limit can be significantly reduced when a back-EMF based rotor position estimation method is combined with a highly accurate and dynamic dead-time compensation using FPGA-operated current oversampling. For the experimental results the rotor position estimation [3] is combined with the predictive dead-time compensation [4]. The results demonstrate a significant reduction of the low-speed limit to a rotor speed that is about 0.5% of the rated speed.
AB - As the back electromotive force (back-EMF) scales with the rotor speed of the permanent magnet synchronous machine (PMSM), this generally results in a low-speed limit for back-EMF based rotor position estimation. As shown in [1], this low-speed limit is primarily determined by the inverter's nonlinearity effects which are significantly caused by the inverter's dead-time [2]. With decreasing rotor speed, the modulation index of the inverter is reduced and the relative voltage error due to the inverter's dead-time effect increases compared to the machine's back-EMF. Therefore, the aim of this paper is to show that the low-speed limit can be significantly reduced when a back-EMF based rotor position estimation method is combined with a highly accurate and dynamic dead-time compensation using FPGA-operated current oversampling. For the experimental results the rotor position estimation [3] is combined with the predictive dead-time compensation [4]. The results demonstrate a significant reduction of the low-speed limit to a rotor speed that is about 0.5% of the rated speed.
KW - current oversampling
KW - Dead-time compensation
KW - Sensorless control
UR - http://www.scopus.com/inward/record.url?scp=85056601966&partnerID=8YFLogxK
U2 - 10.1109/SLED.2018.8485822
DO - 10.1109/SLED.2018.8485822
M3 - Conference contribution
AN - SCOPUS:85056601966
T3 - Symposium on Sensorless Control for Electrical Drives
SP - 60
EP - 65
BT - 2018 IEEE 9th International Symposium on Sensorless Control for Electrical Drives (SLED)
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 9th IEEE International Symposium on Sensorless Control for Electrical Drives, SLED 2018
Y2 - 13 September 2018 through 14 September 2018
ER -