Development of double sided linear pulse motor

Several novel design processes have been employed to develop two types of small linear pulse motors (LPM) with high thrust and high reliability. These LPMs are small enough for use in an implantable artificial heart. High thrust force is secured by means of a double-sided structure. A laminated core of cobalt steel plates and a rare earth magnet have been employed as the magnetic materials. One LPM has a two-phase, eight pole, four-coil construction and has been developed with the principal aim of miniaturization. The other has a two-phase, twelve-pole, two-coil construction and has been developed chiefly for ease of manufacture. Both types of LPM can have two to five times better input watt ratio, mass ratio, and volumetric ratio in relation to generated thrust than the conventional LPM