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.
Micro-hydroelectric power plants exhibit low efficiency due to the small size. For this reason, the selection of a high-efficiency electrical machine is particularly important in order to improve the performance of the generation system and to respect the energy policies. In this paper, the performance of different types of machine are computed and compared. In particular an Induction Machine (IM),...
This paper describes a new method of deriving greater torques per unit volume from Permanent magnet (PM) machine configurations. The method involves splitting of the stator teeth in order to introduce a magnetic gear ratio in to the torque equation. Also some of the theory and mathematical equations behind the design of the new split teeth machine have been shown and descried. Two different initial...
Conservation of power in time-stepping finite-element (FE) simulation of electrical machines is studied. We propose a method for accurately obtaining the instantaneous time derivative of the FE solution, from which the instantaneous eddy-current losses and the rate-of-change of the magnetic field energy are calculated. The method is shown to be consistent with different time-integration schemes, unlike...
For high speed permanent magnet (PM) synchronous machines with a moderate over-speed limit of up to typically 150 m/s surface velocity, the buried magnet rotor concept, utilizing the steel sheet strength for fixing the magnets, is applicable. It allows the utilization of an additional reluctance torque via a negative d-current operation. A reduction of the PM volume by 50% in comparison to surface...
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.