Linear Permanent Magnet Generators – I
Wave energy and tidal power have always been an area of interest in many nations since there is an immense potential in these energy sources but the problem of energy conversion has always been a daunting issue. The traditional energy conversion devices use rotary generators which are high speed and convert the mechanical force to electricity.
To combat these adversities, growing interest has begun in linear permanent magnet generator for energy conversion. The motion of the rotor in a linear generator is unlike the traditional rotary generator. What differentiates a linear generator from th later is that the motion goes straight up and down in a linear generator. Because of this linear feature it is possible to couple the motion of the rotor to the reciprocating vertical motion of the ocean waves. By coupling, we can eliminate the use of gearboxes and power take off schemes. A linear alternator is most commonly used to convert reciprocating (i.e. back-and-forth) motion directly into electrical energy. Because of this ability, this type of permanent magnet alternator is suitable for tidal action and production of electricity from that motion.
