Abstract: An individual determination device for target equipment, includes: a coupling circuit electrically connected to an interface in target equipment, and to detect a signal showing an electromagnetic characteristic from target equipment, to extract an electromagnetic characteristic signal showing an individual characteristic of the target equipment, from the conduction noise detected thereby, and to output the electromagnetic characteristic signal; a characteristic measurement device to receive the electromagnetic characteristic signal from the coupling circuit, and to output individual characteristic data showing the individual characteristic of the target equipment on a basis of the electromagnetic characteristic signal; a storage device to store individual characteristic data showing an electromagnetic individual characteristic of original target equipment; and a comparison and determination device to compare the individual characteristic data from the characteristic measurement device and the individual chara

Abstract: An electric motor having a rotor structure and a production method thereof, wherein a strain due to temperature change does not occur and a manufacturing problem does not occur. Each permanent magnet does not contact each other, and a deformable intervening member is positioned between the end surfaces of the magnets. Intervening member is an elastically or plastically deformable member, and the thickness of the intervening member in the direction of the rotation axis of the rotor is determined so that the neighboring permanent magnets, which are bonded to a rotor core within a manufacturing temperature range of the rotor, do not contact each other at a lower limit of an operating temperature of the electric motor.

Abstract: An electric motor having a rotor structure and a production method thereof, wherein a strain due to temperature change does not occur and a manufacturing problem does not occur. Each permanent magnet does not contact each other, and a deformable intervening member is positioned between the end surfaces of the magnets. Intervening member is an elastically or plastically deformable member, and the thickness of the intervening member in the direction of the rotation axis of the rotor is determined so that the neighboring permanent magnets, which are bonded to a rotor core within a manufacturing temperature range of the rotor, do not contact each other at a lower limit of an operating temperature of the electric motor.

Abstract: A method of manufacturing a rotor of an electric motor, the rotor including a laminated core of multi-layer structure formed from electromagnetic thin plates laminated in an axial direction of a rotational shaft, and a pair of end plates disposed on opposite sides in the axial direction of the laminated core, and the rotor being rotatably disposed in an inside of a stator, the method including: fitting the rotational shaft into an insertion hole formed in a center region of the end plates having elasticity in a direction of plate thickness; positioning the end plates at specified position on the rotational shaft; and abutting either one of the end plates in elastically deformed state to at least one end of the laminated core.

Abstract: An electric motor 1 includes a rotor 4 having a rotary shaft 9, a stator 5 annularly surrounding the outer periphery of the rotor 4 in spaced relation therewith, a housing 3 for protecting at least the axial end surfaces of the stator 5, bearings 2 for rotatably supporting the rotary shaft 9, and a bearing mounting member 7 arranged around the rotary shaft for fixing the bearings 2 on the housing 3. The electric motor 1 further includes an adjusting member 11 interposed between the bearing mounting member 7 and the housing 3 for adjusting the diametrical inclination of the axial width of the space between the bearing mounting member 7 and the housing 3.

Abstract: At least one cavity is formed extending along the axis of rotation of a rotor. One or more elastic members are fitted into the cavity to balance the rotor. Once the elastic members are inserted in the cavity, they apply their own elasticity to the inner wall of the cavity, so that they are stably held in the cavity.

Abstract: An electric motor capable of securing sufficient degree of freedom in selecting a direction of approaching and connecting electric cables to internal cables of the electric motor. A cable introducing member is in the form of a hollow rectangular prism having four side walls and a through hole formed on one of the side walls. The cable introducing member is detachably mounted on a base member fixed on a body of the electric motor by screws to have one of four orientations angularly displaced by 90° so that the through hole is positioned in conformity with the approach direction of the electric cables. The position of the through hole can be changed by detaching the cable introducing member from the base member and remounting the member to have a different orientation. A terminal rest is provided on the base for connection of the electric cables with the internal cables.

Abstract: An electric motor capable of easily obtaining a required output characteristic. Two separated windings are provided for each of phases U, V, W. Connector units A-I for connecting the windings, and amplifier connection terminals AT1-AT2 are provided. By selectively setting connection states of the connector units A-I, an electric motor having stator windings in a star connection in series or parallel, or an electric motor having stator windings in a delta connection in series or parallel is obtained. By connecting amplifiers to the amplifier connection terminals AT1, AT2 separately, and selecting the connection states of the connector units A-I, an electric motor having an output characterstic equivalent to two electric motors can be obtained. Depending on a machine to which an electric motor is to be applied, an electric motor having an optimum output characteristic can be obtained only be selecting the connection states of the connector units.

Abstract: An electric motor capable of securing sufficient degree of freedom in selecting a direction of approaching and connecting electric cables to internal cables of the electric motor. A cable introducing member is in the form of a hollow rectangular prism having four side walls and a through hole formed on one of the side walls. The cable introducing member is detachably mounted on a base member fixed on a body of the electric motor by screws to have one of four orientations angularly displaced by 90° so that the through hole is positioned in conformity with the approach direction of the electric cables. The position of the through hole can be changed by detaching the cable introducing member from the base member and remounting the member to have a different orientation. A terminal rest is provided on the base for connection of the electric cables with the internal cables.

Abstract: At least one cavity is formed extending along the axis of rotation of a rotor. One or more elastic members are fitted into the cavity to balance the rotor. Once the elastic members are inserted in the cavity, they apply their own elasticity to the inner wall of the cavity, so that they are stably held in the cavity.