Abstract: In a brushless motor, the frequency of an output signal of a synchronizing signal generation unit, a duty ratio in a synchronized operation mode and a duty ratio in a rotator position detection operation mode are set such that a rotating speed in the rotator position detection operation mode becomes equal to or lower than a rotating speed in the synchronized operation mode, thereby enabling smooth change-over from the synchronized operation mode to the rotator position detection operation mode.

Abstract: This invention relates to a method or apparatus by which comparatively low-voltage electric wires and cables laid at power stations and other locations can be diagnosed for deterioration of their polymer-insulation in a non-destructive way. The method or apparatus comprises applying a torsional force to the electric wire or cable, detecting the resulting repulsion as a torque, and estimating the degree of deterioration of the polymer-insulation in the electric wire or cable on the basis of the detected value of torque.

Abstract: An operator console for use in an imaging diagnostic apparatus, comprising means for displaying a full length figure of a human body; means for displaying respective figures representing the axial plane, sagittal plane, and coronal plane of the body figure; means for displaying respective figures representing pitching, yawing, and rolling of these planes; plane designating means which are manipulated by an operator; and tilt direction designating means which are manipulated by an operator, whereby the plane and the tilt direction designated by the operator are displayed by means of the figures in connection with the body figure.