Speed Sensorless Model Predictive Torque Control of Induction Motors using A Modified Adaptive Full-order Observer
In this paper, a new design of the state observer is proposed to reduce the unstable low-speed region of the adaptive full-order observer (AFO) based speed sensorless speed control of induction motors (IM). The proposed state observer is designed in z-domain rather than in s-domain following the pol...
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| Main Authors: | , , , |
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| Format: | Bài trích |
| Language: | eng |
| Published: |
IEEE Transactions on Industrial Electronics
2021
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| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9479743 https://dlib.phenikaa-uni.edu.vn/handle/PNK/2858 |
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| Summary: | In this paper, a new design of the state observer is proposed to reduce the unstable low-speed region of the adaptive full-order observer (AFO) based speed sensorless speed control of induction motors (IM). The proposed state observer is designed in z-domain rather than in s-domain following the pole-placement approach. The convergence rate of the proposed observer can be made faster than that of the IM poles without extra oscillation effects and the unstable low-speed region of AFO can be reduced to the zero-synchronous-frequency (ZSF) line. Also, a modified adaptation law of the AFO is derived to estimate the rotor speed. Based on the modified AFO, a continuous control set model predictive control (CCS-MPC) is designed for the inner-loop torque control. The cost function of the CCS-MPC is made of the predicted tracking errors on the state and control input. Finally, the dual-loop speed sensorless speed control using the modified AFO and CCS-MPC is presented in simulations and experiments. |
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