Abstract
This paper presents analysis and study of the single-phase transverse-flux machine. The finite element method results of the machine are compared with the laboratory measurements to confirm the accuracy of the computer model. This computer model is then used to investigate the effect of the machine’s geometry on its output characteristics. Parametric analysis of the machine is carried out to find the optimal air-gap diameter at which the cogging torque of the machine is minimal. In addition, the influence of the coil cross-section on the torque and output power characteristics of the machine is investigated and discussed.
Highlights
Coil Cross-Section at the GivenMotors with a transverse magnetic flux have a high potential in terms high torque and power density [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17]
The magnetomotive force (MMF) of the winding needs to be matched with the magnetomotive force of permanent magnets
Increasing the winding cross-section will not always improve the characteristics of the machine, and, in some cases, can even lead to the significant drawbacks in performance. This is explained as follows, a winding with a large cross-section has an MMF comparable to the MMF of permanent magnets, i.e., an increase in the cross-section of the machine winding is possible to a limited value, after which the TFM characteristics significantly deteriorate
Summary
Coil Cross-Section at the GivenMotors with a transverse magnetic flux (transversal flux machines—ТFMs) have a high potential in terms high torque and power density [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17]. TFMs allow implementing a multi-pole design (30–60 poles), which makes it possible to create lowspeed high-torque machines for direct (gearless) applications. In order to develop a multi-phase TFM, identical single-phase units can be stacked together and shifted by the corresponding phase angle. Despite these advantages, only a few companies are adopting TFM production recently. High cogging torque, and high manufacturing cost prevent many industries from adopting these machines. In recent decades, due to the development of simulation-based software, various numerical methods, and modern manufacturing technologies, TFMs have gotten more interest from both academia and industry. Several research groups are actively involved in the design and production of this type of machine [1,2] including Rolls Royse [6]
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