Abstract: A rotary electrical machine includes a rotational shaft supported by a housing for rotation about an axis, a rotor coupled with the rotational shaft, and a stator fixed to the housing and oriented to face the rotor. A rotor position changing mechanism moves the rotor in an axial direction of the rotational shaft using a portion of a torque transmitted between the rotational shaft and the rotor as a driving force. The rotor position changing mechanism controls the strength of the magnetic field between the rotor and the stator by moving the rotor toward or away from the stator.

Abstract: A rotating electric machine according to the present invention includes: a rotation axis extending along a first direction; a first rotor for coupling with the rotation axis to rotate together with the rotation axis; a first stator disposed so as to oppose the first rotor; and a moving mechanism for moving the first rotor so that relative positions of the first rotor and the first stator are changed.

Abstract: This invention provides a rotary electric machine with a high productivity/maintainability. Since the shaft portion 43 or the stepwise drawn portion is formed with a flat face 47 perpendicular to the rotational axis, when the magnetic poles 42 are bonded to the rotor 40, an accurate gap control can be achieved by applying a certain pressure to the magnetic poles with a jig or the like using the perpendicular flat face 47 as reference, or by controlling the distance from the perpendicular flat face 47.

Abstract: The present invention provides an optical element having a three-dimensional structure which can function in a visible range and can improve adherence at a structural interface of the element, and a method of manufacturing the optical element. The optical element including a substrate and at least a first layer and a second layer on the substrate is manufactured such that each of the first layer and the second layer has a repetition structure of spaces and structural parts at a pitch equal to or less than a wavelength of visible light, and at an interface between the first layer and the second layer, overlapped structures are provided in which the repetition structure of the first layer and the repetition structure of the second layer overlap in a stack direction of the layers.

Abstract: A relative position detection-and-control device is designed with multiple Hall Effect sensors. In one embodiment, the multiple Hall Effect sensors comprise two different types of Hall Effect sensors. The two different types can be linear and digital. The output of the sensors is used to determine the position of an accelerator control, such as a twist grip, and to control an engine or motor in accordance with the operator demand evidenced by the position of the accelerator control.

Abstract: A rotating electric machine according to the present invention includes: a rotation axis extending along a first direction; a first rotor for coupling with the rotation axis to rotate together with the rotation axis; a first stator disposed so as to oppose the first rotor; and a moving mechanism for moving the first rotor so that relative positions of the first rotor and the first stator are changed.

Abstract: An electric bicycle having a front cover unit for housing a controller having an indicator is provided. The front cover unit is attached to the body of the electric bicycle substantially near a steering shaft. The controller can be attached to an interior portion of the front cover unit. The indicator can be attached to the controller and can be exposed through a window in the front cover unit. The front cover unit can comprise a front surface cover member and a rear surface cover member. The front surface cover member can be attached to and detached from the rear surface cover member. The rear surface cover member can have a first recessed portion having a first window for exposing the indicator and a second recessed portion having a second window for exposing a power switch.

Abstract: A motor driven vehicle includes an electric motor that drives wheels through a power source and an electric motor control unit that drives the electric motor. When a voltage of the power source is a predetermined value or greater, the electric motor control unit controls the electric motor such that rotational speed-torque characteristics that the electric motor has are maintained when the voltage of the power source is at the predetermined value.

Abstract: An electrically-powered scooter including a front wheel, a rear wheel and a frame assembly. A handlebar assembly and a seat assembly are supported by the frame assembly. The frame assembly includes a left frame rail and a right frame rail spaced laterally from one another and extending between the handle bar assembly and the seat assembly. A battery support extends between the left and the right frame rails at a position intermediate the handle bar assembly and the seat assembly. A battery is supported by the battery support. In one arrangement, the battery support includes an enclosure defining a battery storage chamber. The enclosure includes a guide member configured to engage a guide recess of the battery to guide the battery into the battery storage chamber. In another arrangement, the battery may include a recharging port, an axis of which defines an oblique angle with an axis of the battery.

Abstract: A magnet for a dynamo-electric machine has a plurality of magnetic poles disposed substantially in a circular shape and opposite a plurality of teeth disposed substantially in a circular shape, the magnetic poles and teeth separated by a gap in an axial direction of a revolving shaft. A plurality of inter-pole sections extend circumferentially between adjacent magnetic poles out of the plurality of magnetic poles. The inter-pole sections have tooth-opposed surfaces that are recessed relative to the surfaces of the magnetic poles opposite the teeth in the direction of the revolving shaft. The plurality of magnetic poles and the plurality of inter-pole sections are integrally formed.

Abstract: An electric vehicle includes a motor, a first controller that controls the motor, a chargeable battery supplying electric power to the motor, a second controller connected to the battery that controls electric charge for the battery and electric discharge from the battery and a first communication path that communicates between the first controller and the second controller. The first and the second controllers each includes a mutual actuating unit for actuating the other controller via the first communication path in response to actuation of the first or second controller.

Abstract: A rotary electrical machine includes a rotational shaft supported by a housing for rotation about an axis, a rotor coupled with the rotational shaft, and a stator fixed to the housing and oriented to face the rotor. A rotor position changing mechanism moves the rotor in an axial direction of the rotational shaft using a portion of a torque transmitted between the rotational shaft and the rotor as a driving force. The rotor position changing mechanism controls the strength of the magnetic field between the rotor and the stator by moving the rotor toward or away from the stator.

Abstract: The present invention restrains generation of an eddy current caused by leaked magnetic flux, and reduces iron loss due to the eddy current. A tooth 61 is mounted to a stator yoke 60 in a state in which at least part of it (a portion 81 to be inserted into the yoke) is inserted into an insertion hole 75 formed through the magnet-opposed surface of the stator yoke 60, and the cross-sectional area S1 (See FIG. 6A) of the portion 81 of the tooth 61 to be inserted into the yoke, which is taken perpendicularly with respect to lines of magnetic force B1 generated at the tooth 61 when a coil 62 is energized, is larger than the cross-sectional area S2 (See FIG. 6B) of the portion 82 to be disposed within the coil of the tooth 61, which is taken perpendicularly with respect to the lines of the magnetic force B1.

Abstract: A rotary electric machine capable of optionally adjusting output characteristic and an electric motor vehicle using the rotary electric machine are provided. A rotary electric machine is constituted with: a rotary shaft 220; a rotor 40 connected to the rotary shaft 220; a stator 31 placed opposite the rotor 40; a stepping motor 60 serving as an adjusting motor for adjusting the position of the rotor 40 relative to the stator 31 in the rotary axis direction; and a movable member 47 or the like that is engaged to the rotor 40 and converts the rotation of the adjusting motor 60 into the displacement of the movable member 47 in the axial direction of the rotary shaft 220.

Abstract: A method for carrying out a boosting operation includes detecting that a boosting operation has been carried out for making a current value of an electric motor larger than a normal full open throttle value, detecting that an electric motor has not rotated, detecting that a predetermined time period has elapsed since the detection that the electric motor has not rotated; and after the detection that the predetermined time period has elapsed, controlling the current value of the electric motor to be equal to or smaller than a limit value that is smaller than the normal full open throttle value.

Abstract: A relative position detection device is designed with multiple Hall Effect sensors. In one embodiment, the multiple Hall Effect sensors comprise two different types of Hall Effect sensors. The two different types can be linear and digital. The output of the sensors is used to determine the position an accelerator control, such as a twist grip, and to control an engine or motor in accordance with the operator demand evidenced by the position of the accelerator control.

Abstract: A relative position detection device is designed with multiple Hall Effect sensors. In one embodiment, the multiple Hall Effect sensors comprise two different types of Hall Effect sensors. The two different types can be linear and digital. The output of the sensors is used to determine the position an accelerator control, such as a twist grip, and to control an engine or motor in accordance with the operator demand evidenced by the position of the accelerator control. A magnet member is configured to extend the useable region of flux density.

Abstract: A relative position detection-and-control device is designed with multiple Hall Effect sensors. In one embodiment, the multiple Hall Effect sensors comprise two different types of Hall Effect sensors. The two different types can be linear and digital. The output of the sensors is used to determine the position an accelerator control, such as a twist grip, and to control an engine or motor in accordance with the operator demand evidenced by the position of the accelerator control.

Abstract: A diffractive optical element having plural diffraction grating surfaces accumulated, wherein a pair of diffraction grating surfaces are positioned so that a protrusion and/or a recess formed on an outside of one diffraction grating surface engages with a recess and/or a protrusion formed on an outside of the other diffraction grating surface, and wherein the pair of diffraction grating surfaces are defined on materials having different refractive indices and different dispersions and being formed into a kinoform, or a shape and a height of blazed or binary, close to it, such that a largest optical path difference to be applied to light rays passing through the diffraction grating surfaces with respect to plural wavelengths becomes equal to a multiple, by an integral number, of the wavelength.