LINEAR SYNCHRONOUS MOTOR CONTROLLER

摘要

PURPOSE:To prevent pulsation of thrust, when a vehicle passes across adjacent thrust coil sections, without installing a signal line for passing peak current value by providing an operating section for predicting a necessary current when the vehicle advances from one thrust coil section into next thrust coil section. CONSTITUTION:Since a vehicle 1 travels within the position detection range of a cross induction line 3b, a position signal 4b is fed from the vehicle 1 through a relay 5b to a position detector 6b and a position detection signal 7b is fed to a phase synchronization control section 9. A drive controller 8 can graspe the phase from a time point when the behicle 1 is traveling on an adjacent thrust coil group 2a. With regard to the current value, a current value Ip predicted at a prediction current operating section 10 is employed as an initial value at a proportional control section 13 and control is performed based on the initial value when the vehicle 1 advances to a thrust coil group 2b. The predicted current value Ip can be matched at the prediction current operating section 10 with the current value of the drive controller 8a.