The coreless motor comprises a rotation center shaft that extends in the axial direction at the center of a sealed housing, a cylindrical coil that is disposed with respect to the rotation center shaft in the housing, an end surface on one side of the cylindrical coil being supported by a stator and extending in the direction in which the rotation center shaft extends, a rotor that is disposed concentrically with respect to the rotation center shaft in the housing, and that rotates in the circumferential direction of the rotation center shaft, and a liquid refrigerant that is accommodated in the housing, that flows inside the housing due to the rotation of the rotor, and that contacts the cylindrical coil.
H02K 9/20 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
A coreless motor includes a shaft that extends in the axial direction at the center of the coreless motor and passes through said coreless motor; a coil is disposed with respect to the shaft, and has an end surface on one side that is supported by a stator and extends in the direction in which the shaft extends; a rotor that is disposed with respect to the fixed shaft and includes a cylindrical inner yoke and an outer yoke positioned so that the coil is sandwiched between the yokes, the yokes being provided with a magnet positioned on the side of the yoke, a magnet circuit being formed between the yokes, and the rotor being supported by the shaft at the radial center; a housing that includes a cylindrical part disposed concentrically with respect to the fixed shaft on the outside of the outer yoke in the radial direction.
H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
H02K 1/2788 - Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
H02K 21/22 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
3.
WIND POWER GENERATOR UNIT AND COLLECTIVE EQUIPMENT THEREOF
This generator is coreless and therefore rotates even in light winds without cogging, and even when the generator rotates in light winds, the generator can generate electricity in light winds without a booster circuit by switching a coil connection, and blades and a generator yoke are integrated. The present invention comprises blades that rotate in response to wind, a generator provided with a rotating shaft that supports the blades, and a structure that houses the generator. The generator is provided with at least a cylindrical coil body that does not rotate, an inner yoke disposed cylindrically facing the cylindrical coil body with a gap therebetween, and a permanent magnet disposed on a surface of the inner yoke that faces the cylindrical coil body. The cylindrical coil body is composed of three or more coil units for each phase of a plurality of phases, and is furthermore provided with an inter-coil switching device by which a connection pattern between the coil units is switched into three or more stages selected from series, parallel, and a combination of series and parallel, depending on the difference in the rotational force of the blades that is associated with wind speed.
Provided is a method for saving power supplied to a rotating electric machine, the method achieving a power supply energy-saving effect by devising the motor side. According to the present invention, which aims to achieve power supply energy-saving (power saving), a rotating electric machine (motor 10) is connected to a power supply (battery 50). A motor driver (which may be hereafter referred to simply as a driver) 40 is disposed between the battery 50 and the motor 10. The driver 40 is a device for driving and controlling the motor by flowing an electric current therethrough, and is a device for controlling the motor. The driver is indispensable for the driving (including the number of revolutions, speed control, and voltage control) of a brushless motor. A maximum electric current is defined for each driver. From the viewpoint of motor protection and for safety, an absolute maximum rating is defined, and the driver is used with an electric current value at or below the rating. A cable 60 is disposed between the driver 40 and the battery 50. A cable 70 is disposed between the driver 40 and the motor 10. The cables are a main cause of copper loss. Reference numeral 80 designates a coil connection pattern switching device, which is a device for setting switching timing, in addition to a switch function group for switching connections of the coils in the motor 10.
H02P 25/18 - Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
The coreless motor includes a rotation center shaft that extends in the axial direction at the center of a sealed housing, a cylindrical coil that is disposed with respect to the rotation center shaft in the housing, an end surface on one side of the cylindrical coil being supported by a stator and extending in the direction in which the rotation center shaft extends, a rotor that is disposed concentrically with respect to the rotation center shaft in the housing, and that rotates in the circumferential direction of the rotation center shaft, and a liquid refrigerant that is accommodated in the housing, that flows inside the housing due to the rotation of the rotor, and that contacts the cylindrical coil.
H02K 9/20 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
H02K 7/116 - Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
[Problem] To provide a rotating electrical machine that can achieve heightened responsiveness during switchover of a characteristic property, while maintaining predetermined torque even at high rotational speeds. [Solution] Provided is a coreless rotating electrical machine comprising: a housing 12; a rotational shaft 14 that is rotatably supported on the housing 12; an operating coil 18 which constitutes a cylindrical form and one end face of which is supported on a stator; and a rotor 16 which constitutes a cylindrical form, one end face of which is supported on the rotating shaft 14, and which is provided with a permanent magnet 16a on a surface facing the operating coil 18. The electrical machine is characterized in that the operating coil 18 is provided with circuit units 20 (20U, 20V, 20W) that comprise three phases U, V, and W, with each phase being constituted by a plurality of coils, and that enable the connection scheme of the coils constituting each phase to be switched over to either a series scheme or a parallel scheme.
[Problem] To provide a rotary electric machine capable of improving responsivity at the time of switching characteristics while maintaining a predetermined torque even during high-speed rotation. [Solution] This coreless rotary electric machine comprises: a housing 12; a rotary shaft 14 rotatably supported by the housing 12; a cylindrical actuation coil 18 having one end surface supported by a stator; and a cylindrical rotor 16 having one end surface supported by the rotary shaft 14, the rotor having a permanent magnet 16a on a surface opposing the actuation coil 18. The rotary electric machine is characterized in that: the actuation coil 18 is constituted by three phases U, V, and W; each phase is constituted by a plurality of coils; and the rotary electric machine comprises a circuit unit 20 (20U, 20V, 20W) capable of switching the connection format of the coils constituting each phase to either a series format or a parallel format.
Proposed is a hollow cylindrical coil, the peripheral wall of which is formed by stacking a plurality of coil units in the circumferential direction of the cylindrical coil in a roof tile shape, wherein stress acting on a wire rod forming the coil units is suppressed. A plurality of first coil units, a plurality of second coil units, and a plurality of third coil units are overlapped with each other in the circumferential direction of the hollow cylindrical coil in a roof tile shape to form the cylindrical peripheral wall of the hollow cylindrical coil. A portion is not present where the first coil units, the second coil units, and the third coil units are overlapped with each other in layers exceeding two layers in the radial direction of the hollow cylindrical coil. When the first coil units and the like are overlapped in the circumferential direction of the hollow cylindrical coil in the roof tile shape to form the cylindrical peripheral wall, the wire rod constituting the first coil units, the second coil units, and the third coil units only receives a bend as much as the thickness of each coil body in the radial direction of the cylindrical coil at a maximum. When the first coil units and the like are overlapped in the circumferential direction of the cylindrical coil in the roof tile shape to form the peripheral wall, the magnitude of bending of the first coil units or the like in the radial direction of the cylindrical coil does not exceed the thickness size of the coil units.
The present invention is a cylindrical coil the circumferential wall of which is formed of a plurality of coil units successively arranged in the circumferential direction of the hollow cylindrical coil. In the proposed hollow cylindrical coil, stresses acting on wires forming the coil units are suppressed. Each of the coil units is a plate-shaped coil body that includes a first winding portion, a second winding portion, a third winding portion, and a fourth winding portion as a result of an electroconductive wire being spirally wound multiple times around a winding axis orthogonal to the axial direction of the cylindrical coil. The circumferential wall comprises: an inner cylindrical coil body formed as a result of the plurality of coil units being successively arranged in the circumferential direction; an intermediate cylindrical coil body arranged at the radially outer side of the inner cylindrical coil body; and an outer cylindrical coil body arranged at the radially outer side of the intermediate cylindrical coil body. The inner cylindrical coil body, the intermediate cylindrical coil body, and the outer cylindrical coil body are arranged so as to be offset with respect to one another in the circumferential direction, thereby forming the circumferential wall in such a manner that the first winding portions, the second winding portions, the third winding portions, and the winding portions of the coil units constituting the inner cylindrical coil body, the intermediate cylindrical coil body, and the outer cylindrical coil body overlap only in two layers in the radial direction of the cylindrical coil.
Provided is a coreless motor which has a simple structure and with which overheating of a coil during motor operation can be suppressed, and excess current can be supplied to the coil to cause an electric motor to output at high rotation. The coreless motor comprises: a rotation center shaft that extends in the axial direction at the center of a sealed housing; a cylindrical coil that is disposed concentrically with respect to the rotation center shaft in the housing, an end surface on one side of the cylindrical coil being supported by a stator and extending in the direction in which the rotation center shaft extends; a rotor that is disposed concentrically with respect to the rotation center shaft in the housing, and that rotates in the circumferential direction of the rotation center shaft; and a liquid refrigerant that is accommodated in the housing, that flows inside the housing due to the rotation of the rotor, and that contacts the cylindrical coil.
Provided is a coreless motor which has a simple structure and with which overheating of a coil during motor operation can be suppressed, and excess current can be supplied to the coil to cause an electric motor to output at high rotation. The coreless motor comprises: a rotation center shaft that extends in the axial direction at the center of a sealed housing; a cylindrical coil that is disposed concentrically with respect to the rotation center shaft in the housing, an end surface on one side of the cylindrical coil being supported by a stator and extending in the direction in which the rotation center shaft extends; a rotor that is disposed concentrically with respect to the rotation center shaft in the housing, and that rotates in the circumferential direction of the rotation center shaft; and a liquid refrigerant that is accommodated in the housing, that flows inside the housing due to the rotation of the rotor, and that contacts the cylindrical coil.
H02K 9/20 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
H02K 9/19 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
One U-phase coil portion and the next U-phase coil portion in a circumferential direction, one V-phase coil portion and the next V-phase coil portion in the circumferential direction, and one W-phase coil portion and the next W-phase coil portion in the circumferential direction are electrically connected by conductive junctions, respectively.
Present invention relates to a high performance rotating electrical machine which aims at downsizing, and challenges inevitable technical problems such as deterioration of efficiency η caused by copper loss and temperature rise inside the rotating electrical machine due to heat generation induced by eddy current generated in magnetic body. Such technical problem may be solved by: opposingly arranging a rotor 3 with a cup-type mount, the rotor 3 being integrated with magnets 4 equipped on an outer cylindrical air-channel forming body and an inner cylindrical air-channel forming body which forms an air gap where one of end faces of a cylindrical coil is arranged and being coupled to a driveshaft which penetrates a lid-type mount, with respect to a stator 2 with a lid-type mount rotatably coupled with the driveshaft, to which one of end faces of a cylindrically-shaped energizeable coreless cylindrical coil cylindrically formed using a laminate structure consisting of a few overlapping conductive metal sheets; feeding or intaking cooling medium or cooling air to an air gap formed in an inner surface of the cylindrical coil; and directly cooling an inner surface and outer surface of the cylindrical coil arranged in the air gap.
H02K 3/47 - Air-gap windings, i.e. iron-free windings
H02K 21/14 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
H02K 5/173 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
H02K 9/02 - Arrangements for cooling or ventilating by ambient air flowing through the machine
H02K 9/04 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
H02K 5/16 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
H02K 5/15 - Mounting arrangements for bearing-shields or end plates
14.
Coreless rotating electrical machine including stator comprising cylindrical coil and cooling method therefor
The present invention relates to a high performance rotating electrical machine which aims at downsizing, and challenges inevitable technical problems such as deterioration of efficiency η caused by copper loss and temperature rise inside the rotating electrical machine due to heat generation induced by eddy current generated in a magnetic body. Such technical problem may be solved by configuring a coreless rotating electrical machine as comprising a stator having a cylindrical coil of a laminate structure consisting of two-layer or four-layer conductive metal sheets and a lid-type mount which fixes one of end faces of the cylindrical coil, and a rotor having a cup-type mount opposingly positioned with respect to the lid-type mount, with an air gap formed by a bottom, an inner cylindrical air-channel forming body and an outer cylindrical air-channel forming body, in which the cylindrical coil is arranged as suspended, and a plurality of magnets equipped on the outer cylindrical air-channel forming body and/or the inner cylindrical air-channel forming body, the cup-type mount has intake holes leading to the second air space on the bottom and a plurality of exhaust holes leading to the air gap, positioned in a row around a circumference of the outer cylindrical air-channel forming body, close to the bottom, and/or a plurality of exhaust holes leading to the air gap, consisting of arrays in a lengthwise direction of the air gap, from the open end face to the bottom with equally spaced intervals on the circumference of the outer cylindrical air-channel forming body, wherein ambient air taken into the second air space and/or ambient air taken into the outer side of the cylindrical coil, under differential pressure generated around the rotor by rotation thereof, are configured to directly cool a plurality of the magnets exposed in the air gap and both surfaces of the cylindrical coil arranged in the air gap, and to be discharged from the exhaust holes of the rotating outer cylindrical air-channel forming body.
H02K 1/28 - Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
H02K 3/24 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
H02K 21/22 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
H02K 9/04 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
H02K 3/26 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors consisting of printed conductors
H02K 9/02 - Arrangements for cooling or ventilating by ambient air flowing through the machine
H02K 3/47 - Air-gap windings, i.e. iron-free windings
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
15.
Coreless rotating electrical machine with stator including cylindrical coil and cooling method therefor
A high performance rotating electrical machine which aims at downsizing, and challenges inevitable technical problems such as deterioration of efficiency η caused by copper loss and temperature rise inside the rotating electrical machine due to heat generation induced by eddy current generated in magnetic body.
H02K 3/47 - Air-gap windings, i.e. iron-free windings
H02K 21/14 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
H02K 5/173 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
H02K 9/02 - Arrangements for cooling or ventilating by ambient air flowing through the machine
H02K 9/04 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
H02K 5/16 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
H02K 9/06 - Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
H02K 5/15 - Mounting arrangements for bearing-shields or end plates
A rotary electrical machine has a first annular body and a second annular body that face opposite each other with a coil interposed therebetween, either the first annular body or the second annular body being provided with a permanent magnet, the first annular body and/or the second annular body rotating about the axis of a rotating shaft, and the driving force of a motor being extracted through the rotating first annular body or second annular body or through the axis of the rotating shaft rotating with the rotating first annular body or second annular body.
H02K 16/02 - Machines with one stator and two rotors
H02K 21/12 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets
H02K 21/24 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
H02K 5/173 - Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
H02K 21/22 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
H02K 21/14 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
The in-wheel motor of the present invention includes: a cylindrical coil body; a coil body support member fixed to a shaft; an outer yoke that is disposed on an outer circumferential side of the coil body, and is fixed to a wheel disk; a magnet fixed on an inner circumferential face of the outer yoke; an inner yoke that is disposed on an inner circumferential side of the coil body, and is disposed to face the coil body. The outer yoke and the inner yoke are fixed, and are rotatable around the shaft; and a caliper is provided on an inner circumferential side of the inner yoke.
patents
