Ironcore linear motors can produce the large forces needed for many industrial applications. With this force comes an even larger force between the coils and the magnets. Ironcore motors use steel alloy laminations to concentrate and focus the magnetic flux but also produced a large attractive force. The coil must be held off the magnet track by about 1mm through the use of mechanical or air bearings.
Unlike Ironless motors, Ironcore motors typically have a cogging or ripple force. There are two causes of this unwanted force. The first cause is interaction between the leading and trailing edges of the laminations as they pass over a North and South pole magnet during motion. The second is ripple caused by the internal lamination teeth passing over the magnets.
Trilogy's RIPPED Ironcore motors use a unique, proprietary lamination design that virtually eliminates ripple caused by the internal lamination teeth. This design also significantly reduces the ripple from the leading/trailing lamination edges. Other Ironcore motor competitors must skew their magnets to reduce ripple. This in turn decrease the motor's peak force. Magnets are not skewed in RIPPED motors due to the effectiveness of our lamination and winding design.
RIPPED motors use Trilogy's innovative Connector Module. Connector modules include the motor power and overtemp connections, HED's and Home & +/-End-of-Travel Limit sensors. One connector module also includes our LEM magnetic encoder (patent no. 6,326,908,B1) that provides positioning resolution of 5um using the magnets themselves as the scale.
