A tubular generator for marine energy direct drive applications

The paper illustrates the operation of a tubular machine as a linear generator for reciprocating energy sources. Reciprocating energy sources utilization is rapidly increasing nowadays due to the interests in marine energy. Linear generators adopted in marine power plants, offer the advantage of generating without introducing any conversion crank gear or hydraulic system. The use of tubular machine topology allows to improve electromagnetic thrust density. The paper shortly summarizes the principles of the marine wave buoy interaction and reports the design analysis and control of a PM synchronous tubular linear machine based on a scaled prototype.