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This paper is dedicated to studying the inductance of Transverse Flux Machines (TFMs). The high inductance of TFMs causes low power factor, high armature reaction, high core loss, and core saturation that limits available torque. This paper aims to conduct a quantitative study on various components of TFM inductance through analytical equations and 3-D finite element analysis (FEA) to show the reasons...
Design of a permanent magnet transverse flux machine optimized for high torque density and high power factor is presented. The optimization process focuses on performance enhancement through improvement of power factor without sacrificing torque density. Simple magnetostatic simulation based method is proposed for the optimization process. Magnetic couplings among axially separated phases are also...
The reluctance torque of an IPM motor can be effectively utilized by applying the maximum torque per ampere (MTPA) control algorithm, which improves the efficiency and the power density of the motor. However, the motor is unable to operate accurately on the MTPA curve due to the parameter mismatch caused by magnetic saturation and/or temperature variation. This paper proposes the d-axis inductance,...
The vector control scheme for induction motors using the rotor flux reference frame is well known. To provide proper torque production, knowledge of the rotor time constant is essential. Many adaptation schemes have been presented using different paradigms. In this paper a scheme for rotor time constant adaptation is applied, which uses the difference between the measured and the calculated reactive...
The electrical performance characteristics of a polyphase synchronous machine, that is, its voltage-current relations under load, depend essentially upon the nature and the extent of the magnetomotive forces of the armature currents. Broadly speaking, the effect of these magnetomotive forces is two-fold; i. e., (a) they oppose and distort the field magnetomotive force and (b) they create leakage fields...
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