可動磁石形リニア直流モータの定速度制御

抄録

The Linear DC Motor (LDM) are used for CD players and other many equipments, but these are MC-type LDMs as these movers are light. MM-type LDM has advantages at long stroke machines because its mover's feeding wires for driving is not necessary. But control system needs detectors for mover's position and velocity, so detectors are provided along whole stroke length. So that MM-type LDM is not so used because of its large structure for its driving element and detectors.
The trial motor is MM-type LDM without wires, and its simple detector detects both position and velocity at every position along stroke length. As no-wire system, infrared rays transmits the detective signal to the controller. Using this signal, mover is cotrolled at constant velocity by Phase-Lock-Loop (PLL).
On this system, an error by slip of detector is very small. This LDM drived without wires has good character as there is a little effect of this infrared rays transmitter at the velocity control.