Chaos Characteristics and Control of Permanent Magnet Synchronous Motors
The permanent magnet synchronous motor (PMSM), a nonlinear dynamic system, can exhibit prominent chaotic characteristics under some choices of system parameters and external inputs. Based on a mathematical model of the permanent magnet synchronous motor, the existence of chaotic attractor is verified by the phase trajectory, Lyapunov exponent map and the bifurcation diagram. Chaotic phenomenon, such as a strong oscillation of speed and torque, unstable operating performance, affects the normal operation of motor. It makes the PMSM in a stable state to control chaos of the PMSM with a control strategy of infinitesimal geometry, which can eliminate chaos well.
W. Xue et al., "Chaos Characteristics and Control of Permanent Magnet Synchronous Motors", Applied Mechanics and Materials, Vols. 48-49, pp. 292-299, 2011