PERMANENT MAGNET LINEAR SYNCHRONOUS MOTOR WITH COMPENSATED INITIAL ELECTRICAL ANGLE AND METHOD FOR COMPENSATING INITIAL ELECTRICAL ANGLE

摘要

The present invention relates to a permanent magnet linear synchronous motor and an initial electric angle correction method in which the initial electric angle is corrected so that displacement of the moving member does not occur when the initial electric angle is set. Inside the frame extending in the vertical direction, a plurality of permanent magnets in the vertical direction are alternately arranged in polarity. The stator coil is positioned at a predetermined distance from the permanent magnet, and is linearly reciprocated between two points on the frame by applying a current. The stator coil is coupled to the moving member, and the moving member is movably supported by the guide portion extending in the direction perpendicular to the frame. The standby position of the movable member before the current is applied to the coil is a position in contact with the damping member provided at the lower end of the frame, and the coil is installed so that the standby position before the current is applied and the position at the time of initial application of the current coincide. The initial electric angle correction method includes applying a current for initial electric angle setting to the stator coil; Measuring a displacement of the moving member; Cutting off the current to return the moving member and the coil unit to the standby position; And changing the coupling position of the coil unit with respect to the moving member by the displacement amount in the moving direction of the coil unit.;Linear motor, permanent magnet, coil, current, initial electric angle