Journal
INTERNATIONAL JOURNAL OF SYSTEMS SCIENCE
Volume 51, Issue 1, Pages 35-48Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00207721.2019.1692953
Keywords
Surface-mounted PMSM; sensorless control; H-infinity-control; second order sliding-mode observer; L-2-gain analysis
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Funding
- CONACYT [285279]
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We address a solution of the sensorless high-speed tracking control problem for surface-mount permanent magnet synchronous motors under load torque variations. Since the only available measurements are the stator currents, the proposed scheme consists of a second-order sliding-mode observer interconnected with an controller. Thus, disregarding the use of additional sensors to measure the mechanical variables. The observer-controller interconnection is robust against uncertainties and unknown load torque variations. First, the observer estimates rotor angular position and speed variables, theoretically, in finite-time. Then, an controller attenuates the effects of uniformly bounded disturbances. Sufficient conditions are provided to ensure that the closed-loop system is stable. Moreover, it is internally asymptotically stable in the absence of uncertainties and external disturbances. The analysis shows that the observer-controller system possesses an -gain less than a priori given disturbance attenuation level. Emulation trials showed the feasibility of the method.
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