摘要:
In a double-layer concentric-wound armature winding for a dynamoelectric machine, the number of slots per phase per pole is set at q. The armature winding comprising a winding which corresponds to one pole and which includes a plurality of coils having different coil pitches from one another. The coils include at least one coil having the number of turns different from those of the other coils. The number q is set at or above 3. The number of coils in one winding is set at (q-n) where n=1, 2, . . . and q-2. The coils are distributed in the slots so that a double-layer, concentric-wound winding resulting in a sinusoidal distribution of magnetomotive force is formed. In another arrangement, the number of pole windings per phase is half of the number of poles in a double-layer concentric-wound winding or a lap winding. The number of coils in one of the pole windings is set at (2x(q-n)).
摘要:
A stator for a dynamoelectric machine includes an annular stator core composed of a developed core formed by stacking a number of steel sheets, each steel sheet including a plurality of unit cores each of which includes a unit yoke and a magnetic pole tooth and which are sequentially connected together by connecting portions integral with the respective unit yokes, and a stator coil wound on the magnetic pole teeth. Each unit yoke has a circumferential end overlapping, in a direction of stacking of the steel sheets, a circumferential end of the unit yoke adjacent to said each unit yoke.
摘要:
For an electrical reluctance rotary machine, a stator has a winding as an armature, and a rotor has permanent magnet implanting slots provided in a rotor core at lateral sides magnetic poles configured to produce reluctance torque along directions of magnetic flux passing through the magnetic poles to produce reluctance torque, and permanent magnets inserted in the permanent magnet implanting slots so as to cancel magnetic flux of the armature intersecting that magnetic flux, to control a magnetic field leaking at ends of the magnetic poles, having circumferential magnetic concavo-convex. The electrical reluctance rotary machine is configured to meet a relationship, such that 1.6 ≤ P × W pm R ≤ 1.9 where Wpm [mm] is a width of permanent magnet, R [mm] is an outer-diametrical radius of the rotor, and P is the number of poles.
摘要:
In a discharge control section of an inverter control device, when the connection of the battery and the smoothing capacitor is disconnected by means of a contactor, the charge accumulated on the smoothing capacitor is discharged by applying high-frequency voltage to the stator windings of the motor by controlling the main inverter circuit.
摘要:
A rotor for a reluctance type rotating machine includes a rotor core formed by stacking a number of annular core materials each of which includes magnetic concave and convex portions alternately formed on an outer circumference thereof and a central through hole, the rotor core having a key axially extending on an outer circumference thereof, the rotor core being divided into a plurality of blocks, the core materials constituting at least one block having the magnetic concave and convex portions shifted by a predetermined angle relative to the core materials constituting the other or another block on the basis of a center line passing the key, and a rotational shaft inserted through the central hole of the rotor core, the shaft having a key groove engaging the key of the rotor core.
摘要:
According to one embodiment, a rotor is configured by a rotor core and magnetic poles. Two or more types of permanent magnets are used such that each product of coercivity and thickness in the magnetization direction becomes different. A stator is located outside the rotor with air gap therebetween and configured by an armature core winding. At least one permanent magnet is magnetized by a magnetic field by a current of the armature winding to change a magnetic flux content thereof irreversibly. A short circuited coil is provided to surround a magnetic path portion of the other permanent magnet excluding the magnet changed irreversibly and a portion adjacent to the other permanent magnet where the magnetic flux leaks. A short-circuit current is generated in the short circuited coil by the magnetic flux generated by conducting a magnetization current to the winding. A magnetic field is generated by the short-circuit current.
摘要:
A rotor for an electric rotating machine includes d-axis through holes located on respective d-axes, hollow shafts formed in both axial sides of a rotating shaft not inserted into a rotor core, presser plates mounted on both axial ends of the rotor core, cooling grooves formed in faces of the presser plates in contact with the rotor core, a plurality of presser plate refrigerant outlet holes in the presser plates, the presser plate refrigerant outlet holes of one of the presser plates having diameters different from diameters of the presser plate refrigerant outlet holes of one of the other presser plates, and a refrigerant channel formed so that a refrigerant supplied into one of the hollow shafts of the rotating shaft flows through the refrigerant channel and further through the hollow shaft wall hole of said one hollow shaft and the radial grooves of the respective presser plates.
摘要:
An object of the present invention is to provide an internal permanent magnet type rotating electrical machine capable of maintaining compactness and high output and reducing vibration and noise caused by electromagnetic force. The rotating electrical machine of the present invention has an annular stator and a rotor that is arranged inside the stator with an air gap interposed between the stator and the rotor. The stator has a stator iron core provided with a plurality of slots at circumferential intervals and a coil received in each of the slots. The rotor has a rotor iron core, a plurality of permanent magnets embedded in a plurality of magnetic pole forming positions that are set along an outer circumference of the rotor iron core, an iron core section that faces the air gap and is magnetized by the permanent magnets to form a magnetic pole on an air gap fronting face at each of the magnetic pole forming positions, and an axially extending recess formed at a circumferentially central part of the air gap fronting face of each of the iron core sections.
摘要:
A neutral-point terminal device for use with a neutral point side bundle of wires in a polyphase winding of a dynamoelectric machine includes a metal sleeve and an insulating cap covering the metal sleeve. The metal sleeve is covered by the insulating cap so that distal ends of the bundled neutral point side wires remain in an interior of the metal sleeve. The metal sleeve is then pressurized thereby to be deformed so as to be secured to the distal ends of the bundled wires.
摘要:
A rotor for a reluctance type rotating machine includes a rotor core formed by stacking a number of annular core materials each of which includes magnetic concave and convex portions alternately formed on an outer circumference thereof and a central through hole, the rotor core having a key axially extending on an outer circumference, the rotor core being divided into a plurality of blocks, the core materials constituting one of at least three blocks having the magnetic concave and convex portions shifted by a predetermined angle in one of a rotating direction of the rotor and a direction opposite the rotating direction of the rotor relative to a center line passing the key, the core materials constituting each one of the blocks located at both ends of the one block having the magnetic concave and convex portions shifted by a predetermined angle in the other of the rotating direction of the rotor and the direction opposite the rotating direction of the rotor relative to a center line passing the key, and a rotational shaft inserted through the central hole of the rotor core, the shaft having a key groove engaging the key of the rotor core.