Dual-Time-Scale Sliding Mode Control for Surface-Mounted Permanent Magnet Synchronous Motors

The permanent magnet synchronous motors (PMSMs) as the completely symmetrical three-phase machines, which are usually driven by voltage signals. Unfortunately, a PMSM system suffers from different lumped disturbances, such internal parametric perturbations and external load torques, speed regulation problem should be addressed within operation situations. Characterizing current variation of motor winding is much faster than that mechanical dynamic velocity, dual-time-scale sliding mode control (SMC) method for surface-mounted PMSMs proposed in this paper. Firstly, mathematical model established two-phase rotating orthogonal reference coordinate system, slow fast subsystems obtained based on quasi-steady-state theory. Secondly, tracking differentiator (TD)-based exponential reaching law-based controllers individually designed dual-time-scale, respectively. As result, eventual SMC strategy presented, stability analyzed applying Lyapunov main contribution study to present an alternative framework servo where characteristic involved, thus non-cascade structure traditional drive community. Finally, whole built carried out simulation platform. Research results demonstrate presented can accurately track angle velocity signal, while strong robustness response performance guaranteed presence disturbances. In addition, transient values with rapid adjustment characteristic.