Abstract: A winding switching signal generator is configured to obtain information indicating a degree of field weakening from at least one of a current command calculator and a constant output controller, and to generate a winding switching signal for switching from a low speed rotation state to a high speed rotation state when the degree of the field weakening exceeds a predetermined condition in the low speed rotation state.

Abstract: Provided is an inverter apparatus 20 configured to switch a current winding to an optimal winding when a rotation speed of a rotor of an AC electric motor 40 is within a hysteresis region defined by first and second switch timings for switching a state of an armature winding between a first winding and a second winding and when the current winding differs from the optimal winding.

Abstract: Provided is an inverter apparatus 20 configured to switch a current winding to an optimal winding when a rotation speed of a rotor of an AC electric motor 40 is within a hysteresis region defined by first and second switch timings for switching a state of an armature winding between a first winding and a second winding and when the current winding differs from the optimal winding.

Abstract: A winding switching signal generator is configured to obtain information indicating a degree of field weakening from at least one of a current command calculator and a constant output controller, and to generate a winding switching signal for switching from a low speed rotation state to a high speed rotation state when the degree of the field weakening exceeds a predetermined condition in the low speed rotation state.

Abstract: A printing-cylinder bearing device for rotatably supporting a printing cylinder 12 via a frame 6 in such a manner that the printing cylinder can be moved between a printing position and a non-printing position, comprising a radial-load supporting means 3 having between the frame 6 and a shaft 2 of the printing cylinder 12 at least an eccentric part that is rotatable around the centerline of a hole 13 provided on the frame 6, a housing 5 interlocked with the eccentric part and provided in such a manner as to inhibit the axial movement of the printing cylinder 12 with respect to the frame 6, a thrust loading supporting means 4 interposed between the housing 5 and the shaft 2 of the printing cylinder 12, and an eccentric part rotating means 8 for rotating the eccentric part around the centerline of the hole 13 on the frame 6 and holding the rotated position of the eccentric part.

Abstract: A safety device for rotary printing press is provided in which, if a blanket cylinder and a plate cylinder move a little larger, a gap between surfaces of the cylinders and guard member can be maintained to be less than a predetermined value and the function of safety protection is kept properly.

Abstract: A printing-cylinder bearing device for rotatably supporting a printing cylinder 12 via a frame 6 in such a manner that the printing cylinder can be moved between a printing position and a non-printing position, comprising a radial-load supporting means 3 having between the frame 6 and a shaft 2 of the printing cylinder 12 at least an eccentric part that is rotatable around the centerline of a hole 13 provided on the frame 6, a housing 5 interlocked with the eccentric part and provided in such a manner as to inhibit the axial movement of the printing cylinder 12 with respect to the frame 6, a thrust loading supporting means 4 interposed between the housing 5 and the shaft 2 of the printing cylinder 12, and an eccentric part rotating means 8 for rotating the eccentric part around the centerline of the hole 13 on the frame 6 and holding the rotated position of the eccentric part.

Abstract: A safety device for rotary printing press is provided in which, if a blanket cylinder and a plate cylinder move a little larger, a gap between surfaces of the cylinders and guard member can be maintained to be less than a predetermined value and the function of safety protection is kept properly.