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For the torque control of interior permanent magnet synchronous machines (IPMSMs), it is necessary to set a pair of reference currents based on the reference torque. At base speed the reference currents should be chosen in a way on which total current is minimized. This strategy provides copper-loss minimization and is known as Maximum Torque per Ampere (MTPA). Current methods present various disadvantages,...
Five-phase induction machine with a single-tooth winding is shown promise when compared with a conventional five-phase distributed winding in some applications such as high frequency induction motors and motors with long stators and limited diameters. Unlike a conventional five-phase with distributed winding, the effect of non-fundamental subspaces is a quite different in a single-tooth winding. In...
Although PWM inverter-fed drives are now a well-established technology in industrial applications, the generation of common mode voltage associated with these modulation techniques results in undesired bearing current and shaft voltage, which yield bearing failure and electromagnetic interference that increases system maintenance and affects system reliability. In this paper, a cascaded boost inverter...
The use of variable speed drives in fluid pumping applications represents an energy efficient solution for achieving adjustable flow rate. In particular, centrifugal pumps driven by induction motors can be operated at power efficiency levels close to the maximum value while delivering a wide range of flow rates. However, the prevailing head and flow are influenced by the nonlinear characteristics...
This paper proposes a vector-control (power-winding flux orientation) strategy for maximum wind-power extraction of a grid-connected wind-driven Brushless Doubly-Fed Reluctance Generator (BDFRG) system. The adopted generator has two stator windings namely; power winding, directly connected to the grid, and control winding, connected to the grid through a bi-directional converter. In addition, a unity...
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