Dual-Motor Synchronous Control Method for Mining Electric Locomotives Based on Multi-Strategy Improved Cross-Coupling
DOI:
https://doi.org/10.54097/ykd33252Keywords:
Mining electric locomotive, permanent magnet synchronous motor (PMSM), dual-motor synchronous control, multi-strategy improved cross-couplingAbstract
To address the speed synchronization error in the dual permanent magnet synchronous motor (PMSM) control system for mining electric locomotives, this paper proposes an improved synchronous control method based on multi-strategy optimized cross-coupling control. The synchronization error characteristics are analyzed, and the dual-motor system model is established under the cross-coupling structure. A double exponential decay prescribed performance function is designed to achieve fast error convergence combined with Lyapunov stability analysis. Meanwhile, a disturbance observer is constructed to estimate and compensate for the lumped disturbance, thus improving control accuracy. Furthermore, a non-singular integral terminal sliding mode controller is designed to satisfy error constraints and enhance system stability. Experimental results demonstrate that compared with traditional cross-coupling control, the proposed method shortens the settling time by 25% and restricts the overshoot within 20 r/min under no-load conditions. Under sudden load impact, the speed recovery time is reduced by 28%, and the synchronization error is significantly reduced.
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