Related Experiment Videos
Periodic speed ripples minimization in PM synchronous motors using repetitive learning variable structure control.
Weizhe Qian1, S K Panda, J X Xu
1Electrical Machines & Drives Lab., Dept. of Electrical & Computer Engineering, National University of Singapore, Singapore.
ISA Transactions
|October 30, 2003
Summary
A new repetitive learning variable structure control (RLVSC) scheme effectively reduces speed ripples in permanent magnet synchronous motors (PMSM). This method significantly improves motor performance by minimizing torque pulsations.
Area of Science:
- Electrical Engineering
- Control Systems
- Motor Drives
Background:
- Permanent magnet synchronous motors (PMSM) experience speed ripples due to parasitic torque pulsations.
- Conventional PI controllers offer limited effectiveness in mitigating these ripples for high-performance applications.
Purpose of the Study:
- To introduce a simple repetitive learning variable structure control (RLVSC) scheme for reducing periodic speed ripples in PMSM drives.
- To enhance the performance of PMSM by minimizing speed fluctuations.
Main Methods:
- The RLVSC scheme generates a reference compensation current during steady state.
- This compensation current works with the outer loop PI speed controller to minimize speed ripples.
- The RLVSC is designed as a plug-in module for easy integration into existing PMSM drive systems.
Main Results:
- Experimental validation on a DSP-controlled PMSM drive platform confirmed the RLVSC's effectiveness.
- The proposed control scheme reduced speed ripples by approximately a factor of 3.
- Performance improvements were observed under various operating conditions.
Conclusions:
- The RLVSC scheme is a viable and effective solution for mitigating speed ripples in PMSM.
- Its plug-in nature facilitates straightforward implementation in current PMSM systems.
- The RLVSC significantly enhances PMSM performance for demanding applications.