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A scheme for the speed control of permanent-magnet synchronous motor (PMSM), based on second order sliding-mode-control (SO-SMC) algorithm using proportional-plus-integral (PI) sliding plane, is presented in this paper. The model of the PMSM, based on field-oriented, is given and both of second-order sliding mode control law and PI sliding plan are discussed also. Some experiments of simulations have...
The problem of controlling a Permanent Magnet Synchronous Motor is approached in this paper eliminating the necessity of including a speed sensor and without knowledge of the (constant) load torque. The proposed controller is obtained by equipping a well-known state-feedback scheme with an observer for estimating the speed and an adaptation law for the unknown perturbation. The closed-loop is shown...
High resolution optical encoders are used in industrial servo drives with position and/or speed control for providing the respective feedback signals. In applications with lower accuracy requirements resolvers are used as feedback sensors with respect to lower cost. As a resolver is nothing else than an electrical AC machine of special design, there is the basic idea to operate the servo motor itself...
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