The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper focuses on the design process of a direct drive motor which is to be installed within the wheel rim of a light electrical vehicle. The work starts with the set of requirements, considering space and mass restriction, torque capability and cycle efficiency. Next it is discussed in what manner the design goals are conflicting, alluding to the tradeoff between high torque density and efficiency...
The circumferential cooling system, which provides highly effective, integrated but low-cost motor cooling, is introduced. This work is focussed particularly on magnetic effects, which arise from the special construction of the stator core. An explanation for the existence of inter-laminar flux is given and equations for the prediction of its absolute value are derived. Two approaches, an analytical...
Eccentricity always changes rotor position in air gap, which greatly influences the distribution of magnetic flux in air gap and causes a great disturbance force. Therefore eccentricity is always restricted by an application of capture bearing in industry. Factors of unbalance forces based on eccentricities decide on successful design of bearing controller. In this paper, a mathematical model to calculate...
An innovative method of direct stator lamination cooling (air cooling) for electrical machines is presented. Particular aspects of stator design concerning electromagnetic, thermal and fluid mechanical effects are discussed. The paper provides an overview of interdisciplinary research in the field of novel cooling techniques for electrical machines. A combination of analytical and numerical approaches...
This paper introduces a novel magnetic distance sensor, based on compensating current transformers, which combines a direct measuring of displacement and rotor movement velocity in one unit. The velocity signal is used as an auxiliary control variable and involves significant improvements. An external differentiation of the displacement signal is not necessary, thus it reduces the noise level in the...
Super high-speed and high-power electric machines are required for turbomolecular pumps and spindle drives. High rotational speed and high power drives can be achieved with bearingless motors. In the paper a novel switched reluctance bearingless motor (SRBM) with principles of traditional switched reluctance motors is proposed and its performance characteristics are analysed. Its main difference from...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.