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The paper compares different anti-windup strategies for the current control of inverter-fed permanent magnet synchronous machines (PMSM) controlled by pulse-width modulation. In this respect, the focus is on the drive behavior with a relatively large product of stator frequency and sampling time. A requirement for dynamically high-quality anti-windup measures is, among other things, a sufficiently accurate decoupling of the stator current direct axis and quadrature axis components even at high stator frequencies. Discrete-time models of the electrical subsystem of the PMSM are well suited for this purpose, of which the method found to be the most accurate in a preliminary investigation is used as the basis for all anti-windup methods examined. Simulation studies and measurement results document the performance of the compared methods.
Message co chairmen
(2017)
This paper investigates the maximum torque capability and torque ripple reduction using the asymmetric stator teeth for interior permanence magnet (IPM) synchronous machines. Traditional electric machines have the identical width for all stator teeth and the winding function is fixed. Using different widths for different stator teeth changes the winding function, therefore, the torque ripple components. The mathematical modeling of interior permanent magnet (IPM) synchronous machine torque ripple and finite element analysis simulation results for the characteristic properties of electric machines are presented. Compared with a similar rating IPM machine, certain combinations of the teeth widths can reduce the torque ripple by 80% with less than 4% average torque decline.