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Abstract-Clean and sustainable alternative energy is becoming attractive as oil costs rise and the negative side effects of traditional energy systems begin to become apparent. One often overlooked, but still rapidly growing alternative is wave power. There are fascinating new designs for harnessing the tremendous power of the waves. Hence any contribution in this field could be of real interest for numerous specialists. In the paper a novel modular permanent magnet tubular linear generator is proposed and analyzed by means of numeric field computations. It was designed for wave power take off systems to be placed in the Black Sea near the Romanian coasts.

Synchronous reluctance machines become more popular nowadays. Development of power electronics allowed reluctance motors to be used in many drive applications. Due to increased interest in electric vehicles and high prices of PMs, the research on electric drives is mainly focused on reluctance machines. Lack of rotor winding lowers copper losses, simplifies power supply system and increases machine's robustness. SynRM produces torque due to rotor's magnetic anisotropy, which is achieved in machines with transversally laminated rotor by introducing flux barriers. The main goal when designing rotor's flux barriers is to achieve the highest saliency ratio possible. However, since operation of the machine depends on interaction between stator magnetic field and the rotor, both stator and rotor's topologies should be taken into account when designing the machine. This paper presents a comparison of SynRMs with stators of three different slot numbers and two different rotor's topologies.

Abstract-It is crucial for the mankind to develop clean renewable energy sources. Ocean energy is one of the candidates being a huge, yet unexploited renewable energy source on the Earth. Preliminary surveys show that marine power has a potential to supply a significant part of the future energy needs. Hence all the researches done in the field of the wave energy conversion should be of real interest. In this paper the wave energy potential of the Black Sea near the Romanian coasts, a possible power take off system to be set up here, respectively a comparative study on two possible linear generators to be used in such wave energy power converters will be presented.