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Accurate measurements of magnetic properties of soft magnetic composite (SMC) material are performed on an improved 3-D tester by means of novel precision <i>B</i>-<i>H</i> sensing coils attached to the surface of a cubic SMC specimen. By controlling the adjustable excitation topologies, magnetic properties over wide excitation frequency range from 2 Hz to(More)
—Recent advances in solid-state semiconductors have led to the development of medium-voltage power converters (e.g., 6–36 kV) which could obviate the need for the step-up transformers of renewable power generation systems. The modular multi-level cascaded converters have been deemed as strong contenders for the development of medium-voltage converters, but(More)
Single-sided linear induction motors (SLIMs) have lately been applied in transportation system traction drives, particularly in the intermediate speed range. This is because they have merits, such as the ability to exert thrust on the secondary without mechanical contact, high acceleration or deceleration, less wheel wear, small turning circle radius, and(More)
—This paper presents the core loss calculation in soft magnetic composite (SMC) samples and a claw pole permanent magnet machine with SMC stator. By using finite-element analysis of the magnetic field, the total core loss is computed by separating the hysteresis (alternating and rotational, both purely circular and elliptical), eddy current, and anomalous(More)
The direct torque controlled (DTC) permanent magnet synchronous motor (PMSM) drive has become competitive compared with other types of drive systems because of its simple and sensorless control algorithm. The application of the system, however, is handicapped by the difficulty of starting under full load due to the unknown initial rotor position. This paper(More)
For a practical direct torque controlled (DTC) permanent magnet synchronous motor (PMSM) drive system, the information of the initial rotor position, which is usually obtained by a mechanical position sensor, is essential for starting under the full load. In order to avoid the disadvantages of using mechanical position sensors, great efforts have been made(More)
Wind power, as an important and promising renewable resource, is widely studied. Because the wind is highly variable, it is very desirable to operate a wind turbine at variable speeds. In this respect, doubly fed induction generator (DFIG) has become popular in wind power generation system. The steady state simulation analysis of a DFIG is essential to(More)