Abstract
Permanent magnet synchronous machines (PMSMs) have been used in many applications due to their outstanding advantages such as high torque/power density, high efficiency, light weight and good reliability. However the emerging field of electrical traction gave arise to issues which were in general hardly considered in the past Yet, even though well established methods for eDrive control are available, increasing integration of components and demand for new features, like torque harmonic suppression, fault-tolerance and active noise reduction, drive the need for more advanced control functionality. In this contest an algorithm for the harmonic disturbance compensation within the current controller is of great significance. The aim of this paper is the implementation of an enhanced disturbance observer for the real-time reconstruction of the non-sinusoidal induced rotor voltage (BEMF), used then for feed-back compensating injection. The main idea is to enhance the performance of conventional control structures based on the field oriented control (FOC). With this purpose, linear quadratic programming is effectively implemented for reconstructing the trajectory of the disturbances within the signals. Subsequently, making use of model-based considerations, conditions for current and torque harmonics compensation are derived. The overall result is an algorithm able to strengthen the machine operation under strong disturbance effect. The proposed control scheme is tested by mean of numerical simulations and experiments as well.
Published Version
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