Abstract: A busbar unit electrically connected to a motor comprising a stator around which a coil is wound includes: a first terminal including a first body and a first terminal part protruding from an upper portion of the first body and electrically connected to the coil; a first holder configured to support the first terminal such that the first terminal part is exposed to an outside of the busbar unit; and a second holder disposed on an upper portion of the first holder and configured to press the coil against the first terminal part.

Abstract: A system includes a prime mover configured to rotate a shaft. The system also includes a wound rotor induction generator (WRIG). The WRIG includes a rotor coupled to the shaft of the prime mover and configured to rotate when the shaft rotates, where the rotor includes a rotor winding. The WRIG also includes a stator winding electrically connected to a utility source and a load. When the stator winding receives first power from the utility source, the WRIG is configured to transform at least one of a voltage and a frequency of the first power before outputting at least a portion of the first power to the load. When the stator winding does not receive the first power from the utility source, the WRIG is configured to generate second power due to kinetic energy of the rotor and output at least a portion of the second power to the load.

Abstract: A centralized power distribution member A configured to feed power to windings of a stator S of a multi-phase motor includes a plurality of annular busbars 10 each including a power feeding terminal 20 and connection terminals 15 to be connected to one ends of the windings of each phase on one side edge, an annular holder 30 made of synthetic resin and configured to accommodate the busbars 10 laminated in a radial direction in a mutually insulated manner, neutral point busbars 50 configured to connect the other ends of the windings of each phase, and auxiliary holders 60, 60X made of synthetic resin and configured to accommodate the neutral point busbars 50. The auxiliary holders 60, 60X are arranged on one end surface side of the annular holder 30 where the power feeding terminals 20 and the connection terminals 15 are arranged.

Abstract: A method of fabricating a crystal unit fills an adhesive from a first opening in a front surface of a mask of each of penetration holes in the mask in a state in which the mask is set on a base, into each penetration hole, and heats, by a heating element, a sidewall region defining a second opening in a back surface of the mask, in order to cure a sidewall part of the adhesive in the sidewall region defining each penetration hole in contact with the adhesive filling each penetration hole. A crystal blank is bonded on the base using the adhesive in order to form the crystal unit, after removing the mask from the base.

Abstract: The present invention provides a linear motor device that can reduce a variation in thrust caused by a variation in attractive force. The linear motor device includes a linear motor 1 and a control section 30 that controls the linear motor 1. The linear motor 1 includes a magnet member 2 composed of permanent magnets having respective N poles and S poles alternately arranged in an axial direction, and a coil member 3 which is located orthogonally to the axial direction with respect to the magnet member 2 and through which the magnet member 2 is movable in the axial direction relative to the coil member 3. The control section 30 controls current conducted through the coil member 3 so that a moving one of the magnet member 2 and the coil member 3 reciprocates within a use range L corresponding to a part of a pitch p between the magnetic poles N and S in the magnet member 2.

Abstract: A linear actuator includes permanent magnet annuli arranged about an armature core for axial movement in a tubular stator upon energization of coils arranged in concentric association with the armature. The stator has portions extending radially inwards of the coils and towards one another beneath each coil, which define a spacing between the coil and the armature. The annuli have a substantially radially magnetized structure and the coils are configured for single phase power input. In one embodiment (FIG. 6), two pairs of spaced annuli are arranged on the core, wherein the axial length of the outermost annuli is half the axial length of the inner annuli.

Abstract: A centralized power distribution unit for a vehicular thin brushless motor includes a plurality of bus bars and a resin insulating layer that covers the bus bars. The bus bars are disposed correspondingly with phases of the motor. Each of the bus bars has a terminal portion to be connected to a battery and one or more tabs to be connected respectively to one or more windings of a stator. Each of the bus bars is shaped into a substantially annular shape by bending a molded material in a thickness direction. The molded material is obtained by stamping out a conductive metal plate into a strip-like shape. Diameters of the annular shapes of the bus bars are set to be different from one another depending on the corresponding phase of the motor. The bus bars are stacked in a radial direction of the centralized power distribution unit, mutually separated by a predetermined gap.

Abstract: A centralized power distribution unit for a vehicular thin brushless motor includes a plurality of bus bars, an insulating holder that holds the bus bars to form a predetermined gap between the bus bars, and a resin insulating layer that covers the bus bars. Each of the bus bars has a terminal portion to be connected to a power source, such as a battery, and a tab to be connected to a winding of a stator. The bus bars are disposed correspondingly with phases of the motor. A plurality of holding grooves are formed in the insulating holder. The bus bars, which are pre-bent in a thickness direction to be shaped into a substantially annular shape, are respectively accommodated in the holding grooves. The pre-bending is preferably carried out by a bending machine.

Abstract: An assembly for transferring current comprises at least one electrically conductive slip ring; at least one electrically conductive brush for supplying current to the at least one slip ring; and an electric or pressure actuator driven vibration source for changing the position of the brush with respect to the slip ring. If desired, brush current can shared by using inductance variations or by selective coupling of rotor windings to the slip rings.

Abstract: A motor/generator has a stator provided with a plurality of coils (6), a first rotor (3) provided with a fixed number of magnetic poles, and a second rotor (4) provided with fewer magnetic poles than the first rotor (3). A current of the composite wave form is supplied from an inverter (12) to the coils (6) in response to a signal generated by a control unit (15). The control unit (15) is programmed to calculate a wave form of a first current flowing through the coils (6) which generates a rotating magnetic field which is synchronous with a magnetic field produced by the first rotor (3), and calculate a wave form of a second current flowing through the coils (6) which generates a rotating magnetic field which is synchronous with a magnetic field produced by the second rotor (4).

Abstract: A force or fluid pressure transducer comprises a plate-like crystal. The force, to be measured, is applied by two seatings disposed on opposite edges of the crystal. The transducer can measure pressure when a diaphragm is added to provide the force.Two portions of the crystal are maintained in continuous oscillation by feed-back circuits. These portions change their frequencies by different amounts when the force is changed. The difference between the two frequencies is a very accurate measure of the force and forms the output of the transducer.Structures to secure the crystal have, in the past, proved difficult to manufacture. The present invention describes a securing structure for the crystal which substantially improves and facilitates securing and housing the crystal to provide high accuracy under all normal working conditions of the transducer.