An Improved Super-Twisting High-Order Sliding Mode Observer for Sensorless Control of Permanent Magnet Synchronous Motor
Abstract
:1. Introduction
- By introducing the super-twisting structure into SMO, the chattering phenomenon and settling time can be reduced.
- High estimation precision requires accurate motor parameters. Different from the traditional method of applying two observers for PMSM sensorless control with mismatched parameters, only one super-twisting sliding mode observer is designed to simultaneously estimate the rotor position and speed as well as track the parameter disturbances online. In this way, not only is the robustness against the parameter uncertainties enhanced, but the model structure is also simplified.
- An adaptive observer instead of the low-pass filter and phase compensation module is applied to extract the desired back-EMF signals, so as to further improve the estimation accuracy.
2. Design of the Observer
2.1. Improved Super-Twisting High-Order Sliding Mode Observer
2.2. Observer Stability Analysis
- , ;
- .
3. Simulation and Experimental Results
3.1. Simulation Results
3.2. Experimental Results
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
Abbreviations
PMSM | Permanent Magnet Synchronous Motor |
IPMSM | Interior Permanent Magnet Synchronous Motor |
SPMSM | surface permanent magnet synchronous motor |
EMF | Electromotive Force |
SMO | Sliding Mode Observer |
LPF | Low Pass Filter |
HSMO | High-order Sliding Mode Observer |
STA | Super Twisting Algorithm |
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Description | Value | Unit |
---|---|---|
rated speed | 1000 | |
rated torque | 10 | N·m |
stator resistance | 0.93 | |
d-and q-axis inductance | 3 | mH |
permanent magnet flux | 0.32 | Wb |
moment of inertia | 0.0027 | kg·m |
Speed | Method | Steady-State Error | Tracking Time | Estimated Time |
---|---|---|---|---|
1000 rpm | traditional SMO | 10 rpm | 2.19 s | 2.22 s |
traditional STA | 7 rpm | 2.55 s | 2.56 s | |
proposed observer | 4 rpm | 2.20 s | 2.20 s | |
600 rpm | traditional SMO | 9 rpm | 2.23 s | 2.25 s |
traditional STA | 5 rpm | 2.51 s | 2.52 s | |
proposed observer | 3 rpm | 2.22 s | 2.22 s | |
rpm | traditional SMO | 1 rpm | 0.9 s | 1 s |
traditional STA | 0.8 rpm | 0.3 s | 0.5 s | |
proposed observer | 0.5 rpm | 0.3 s | 0.4 s |
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Zhao, Y.; Yu, H.; Wang, S. An Improved Super-Twisting High-Order Sliding Mode Observer for Sensorless Control of Permanent Magnet Synchronous Motor. Energies 2021, 14, 6047. https://doi.org/10.3390/en14196047
Zhao Y, Yu H, Wang S. An Improved Super-Twisting High-Order Sliding Mode Observer for Sensorless Control of Permanent Magnet Synchronous Motor. Energies. 2021; 14(19):6047. https://doi.org/10.3390/en14196047
Chicago/Turabian StyleZhao, Yujiao, Haisheng Yu, and Shixian Wang. 2021. "An Improved Super-Twisting High-Order Sliding Mode Observer for Sensorless Control of Permanent Magnet Synchronous Motor" Energies 14, no. 19: 6047. https://doi.org/10.3390/en14196047