DEVICE FOR ENERGIZING DC MOTOR AND VALVE DEVICE COMPRISING DEVICE FOR ENERGIZING DC MOTOR

摘要

A current-carrying apparatus for a direct-current motor is composed of a commutator, which has a plurality of divided portions arranged in a circle-circumferential direction of the commutator, for commutating a direct current, which is supplied from an electric power source through a first brush, to N commutated currents having different phases from each other one after another, and N slip rings, which are separated from each other in an annulus ring shape to be concentrically arranged in a circumferential area of the commutator and are respectively and electrically connected with one divided portion of the commutator, for respectively carrying one of the commutated currents obtained in the commutator to a corresponding coil of a stator through a second brush. Therefore, the reliability for the current-carrying apparatus can be improved. Also, a valve apparatus using a current-carrying apparatus for a direct-current motor is composed of a stator in which a prescribed number of coils are arranged at almost equal intervals in a circle-circumferential direction of each of a plurality of stator cores, a rotor in which a plurality of permanent magnet magnetic poles are arranged on an outer circumferential surface of the rotor so as to place each permanent magnet magnetic pole at a position corresponding to that of the corresponding coil of the stator, a current-carrying means for commutating a direct current, which is supplied from an electric power source through the rotor, to a commutated current by using the rotor and for carrying the commutated current to each coil of the stator, a shaft member, which is arranged in a center portion of the rotor and is movable in an axial direction of the shaft member according to the rotation of the rotor, and a valve member for performing an open operation and a close operation according to the movement of the shaft member. Therefore, a moment of inertia in the rotor can be lowered, and a valve apparatus can be obtained with superior response for a valve open and close operation. <IMAGE>