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Offshore wind farms are gaining more attention in the development of new renewable energy sources at the expense of onshore wind farms. The higher energy yield of an offshore wind farm is the main advantage [1]. The reliability and efficiency of the wind turbine is of great significance as the capital costs for installation and maintenance as well as the repair time are increased over onshore wind...
Magnets in free space can be modeled using the surface charge model [1]. This model assumes that a magnet can be represented as a layer of positive charges on the top surface of the magnet and a layer of negative charges on the bottom of the magnet. In case of cuboidal magnets this results in analytical field and force [2], [3] equations.
Magnetic field in permanent magnet (PM) synchronous machines is usually analyzed using harmonic modeling (HM) approach [1]. It is a fast and precise tool and therefore is widely used. This modeling technique imposes sources of the magnetic field expressed in terms of current density and magnetization of hard magnetic materials, while the current density corresponds to the armature current. However,...
Due to the increasing demand for high-efficiency electric motors and the maturity of vector-controlled motor drives, the Synchronous Reluctance Motor (SynRM) has received an increasing amount of attention over the past few years. Classically, SynRMs are analysed using analytical models such as presented by Vagati et al.[1]. These models require little computation time and provide the designer with...
In last decades, interest on high-speed permanent magnet (PM) machines has grown significantly due to their high efficiency, high power factor and high power density. However, a weak point of these machines is a risk of magnet demagnetization since rare-earth permanent magnets are sensitive to temperature [1]. The main reason of temperature increase in the rotor are eddy current losses, which are...
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