236results about "Synchronous generators" patented technology

The invention relates to a novel parallel pole-arc-changing hybrid excitation brushless synchronous generator, which comprises a first magnetic circuit, a second magnetic circuit and a third magnetic circuit, the first magnetic circuit is formed by an original stator permanent magnet rotor of the motor; corresponding hybrid excitation rotors are arranged on the left and right outer sides of the stator, and a second magnetic circuit is formed between the hybrid excitation rotors and the iron core of the stator; an excitation winding is further arranged on the outer side of the corresponding hybrid excitation rotor, and the excitation winding enables common teeth of the hybrid excitation rotor to be magnetized into different polarities, so that a third magnetic circuit for increasing or weakening magnetism is formed. The motor has the beneficial effects of wide rotating speed adjusting range, high power density and high efficiency.

An apparatus has a rotor magnetically coupled to a stator through an air gap, and a plurality of phase windings is located in the stator and configured to generate a first magnetic field in the air gap. The rotor contains a group of permanent magnet poles and a group of wound poles which are configured to generate a second magnetic field in the air gap. Each wound pole has a field winding around its body and a d-axis magnetic reluctance barrier is placed in or around the body so a d-axis magnetic reluctance of a wound pole is approximately the same as that of one of the permanent poles.

To provide a wound-field rotary electric machine that can achieve appropriate rotation in a rotor that integrally rotates with a circuit module.SOLUTION: A wound-field rotary electric machine has a stator that has a stator winding, and a rotor that has field windings wound individually around main pole parts of a rotor core, and a harmonic current for inducing a field current in the field windings is caused to flow in the stator winding. The rotor has a circuit module that is connected with the field windings and forms a resonance circuit with the field windings, and a coil end cover 103 that covers coil end parts of the field windings. The coil end cover 103 is a balance adjustment member that adjusts the weight balance in a circumferential direction of the rotor, and has an adjustment part in at least part in the circumferential direction where the weight is reduced or increased.SELECTED DRAWING: Figure 16

A rotor (60) comprises: a rotor core (61) having a plurality of main pole portions (62); a field winding (70) provided around each main pole portion; an outer circumferential coating portion (102) formed from a wire (131) helically wound around the radially outer side of each main pole portion and the field winding; and a coil end cover (104) covering a coil end of the field winding. The outer circumferential coating portion and the coil end cover are provided continuously in the axial direction with the respective axial end faces thereof facing each other on the radially outer side of the field winding. The wire is wound in the axial direction to such an extent that the wire overlaps the rotor core in the radial direction. The wire is drawn in the axial direction along the outer circumferential surface of the coil end cover on the axially outer side of the outer circumferential coating portion and is fixed to the coil end cover at a position farther inward in the radial direction than the outer circumferential surface of the outer circumferential coating portion.

An excitation system (15) is disclosed for providing excitation to a main rotating electrical machine (2). The excitation system comprises an exciter (50) and an auxiliary generator (52). The exciter and the auxiliary generator have separate stator cores (14, 18) and share a common rotor core (16). The common rotor (16) core may be located between the two stator cores (14, 18). This may help to optimize space, improve material usage and reduce the total rotating mass. A mounting arrangement for the common rotor core is also disclosed.

The present invention relates to a power transmission arrangement (10), in particular an inductive power transmission arrangement (10), and to a rotary transformer, for transmitting power to a rotor arrangement of a separately excited electrical machine (20), comprising a hollow rotor shaft (11), a primary arrangement (1), a carrier lance (3) connected to the primary arrangement (1), and a bearing arrangement (4) that mounts the carrier lance (3) connected to the primary arrangement (1) in a cylindrical part of the hollow shaft (11).

A generator comprises a pair of coaxially aligned rotors including an inner rotor disposed within an outer rotor that combine to form a magnetic field and armature pair. First and second prime movers rotate the rotors in opposite relative directions such that electricity is produced from relative rotation of the magnetic field and armature. First and second flywheels are connected to or integral with the rotors to rotate therewith. Each flywheel has a magnetic circumference. One or more magnetic supports are arranged relative to the circumference to cause at least one vertically acting magnetic force to be exerted on the circumference to support the flywheel's weight. A pair of magnetic stabilisers are arranged on respective opposed lateral sides of each flywheel. The stabilisers cause opposed horizontally acting magnetic forces to be exerted on the flywheel's circumference to impede lateral movement of the flywheel to stabilise the flywheel.

A cable guide (44) for connecting phase conductors (36) to a rotor of a generator (20) of a wind turbine (10) is provided, comprising a hollow tube (46) for axial insertion into a rotor shaft (26) of the rotor, and a divider (48) provided within the hollow tube (46). The divider (48), together with the hollow tube (46), defines largely separate passage cross-sections (54), and each passage cross-section (54) is dimensioned to accommodate a maximum of one of the phase conductors (36). Due to the defined positioning of the phase conductors (36) in their respective passage cross-sections (54), the relative position of the phase conductors (36) in the rotor shaft (26) can be easily predefined for assembly and disassembly, even without hardened filler material, thus enabling a repair-friendly, electrically connectable rotor.

To provide a bearing device for wheels, which is excellent in water resistance, good in assemblability in a simple construction, and equipped with a power generator and a wireless communication function.SOLUTION: A bearing device 1 includes a bearing part B, a magnetic ring 12, a bearing cap 11, a stator 17, and a circuit board 18, the bearing cap 11 serving for closing the opening end on the inner side of an outward member 6, the stator 17 being fixed to the inner face of the bearing cap 11 so as to be opposed to the magnetic ring 12 to form a power generator G together with the magnetic ring 12, the circuit board 18 being fixed to the inner face of the bearing cap 11, the circuit board 18 including a power supply circuit 23 for rectifying AC voltage of the power generator G, sensors 24, 25 for monitoring the state of the bearing part B, and a wireless communication circuit 26 for wirelessly transmitting the output of the sensors 24, 25 to the outside.SELECTED DRAWING: Figure 1

To provide a non-contact power supply technique that can be suitably used for a motor that requires a large amount of electric power to be supplied to a rotor and requires a high number of revolutions.SOLUTION: A power supply device 90 of the present invention is a power supply device 90 having a power supply part that supplies electric power to a rotor 310 in a non-contact manner. A power supply part Tr includes a power transmission part 71 that transmits the electric power to the rotor 310 side; and a power reception part 72 that is provided on the rotor 310 side and receives the electric power in the non-contact manner with the power transmission part 71. The power reception part 72 includes a power reception-side core 722 that includes an annular recess part that accommodates a coil and includes an opening part of the annular recess part on the power transmission part 71 side, and an outer peripheral member 723 that is provided so as to cover the outer periphery of the power reception-side core 722.SELECTED DRAWING: Figure 3

In this rotary electric machine, a refrigerant is sprayed from the axial direction toward an axial end of a rotor. A circuit module (106) having an electrical component connected to a field winding is fixed to a rotating shaft and positioned in the rotor so as to face an axial end of the field winding. The circuit module has a component holder (141) that accommodates the electrical component. At one of the end surfaces on both sides of the component holder in the axial direction, a heat dissipation plate (151) is fixed so as to cover, in the axial direction, an accommodation area in which the electrical component is accommodated in the component holder, and at the other end surface, the accommodation area is blocked by a closing unit (148) in a state in which the electrical component is not exposed.

The invention relates, in one aspect, to a synchronous electric machine (M1, M1 ', M1' ', M1' '', M2, M2 ', M20, M21, M20') comprising: a first claw-pole stator inductor (1, 1 ', 4, 4') comprising: a claw-pole ferromagnet (11, 41) comprising Pe poles; a first stator armature (2, 2 ', 2u, 5, 5', 5u), the number of poles Pa of which is different from the number of poles Pe; a ferromagnetic rotor (3, 6, 6 ') comprising: an axis of rotation (X); comprising Ns ferromagnetic elements uniformly distributed along the axis of rotation (X), the Ns being equal to the sum or difference between Pa / 2 and Pe / 2, the set of ferromagnetic elements (30, 30u, 60, 60u) being located between the first claw pole stator inductor (1, 1 ', 4, 4') and the first stator armature (2, 2 ', 2u, 5, 5', 5u).

The invention relates to a power transmission assembly (10), in particular an inductive power transmission assembly (10), and to a rotary transformer for transmitting power to a rotor assembly (20) of an externally excited electric machine (30), comprising a carrier lance (4), which is connected to a primary assembly (3); a bearing end (1); and an inner installation securing means (2), which pre-installs the primary assembly (3) in the bearing end (1) and remains in the bearing end after the power transmission assembly (10) is installed.

To suppress excessive heat in a rotor.SOLUTION: A wound field type rotating electric machine 40 includes a stator 50 having a stator winding 52, a rotor 60 having a rotor core 61 and a magnetic field winding 70, and an electric circuit module 102 provided in the rotor 60 in an integrally rotatable manner to have an electrical component connected to the magnetic field winding 70. The rotor 60 includes, as electric circuit module 102, a first circuit module 141 arranged on a first rotor end part X1 side being one side in an axial direction of the rotor core 61, and a second circuit module 142 arranged on a second rotor end part X2 side being the other end side in the axial direction of the rotor core 61.SELECTED DRAWING: Figure 8

Contactless energy transmission device for a rotor of an electric machine, in particular a separately excited synchronous machine within a drive train of a motor vehicle, comprising - a housing part (6) which can be rigidly coupled to a housing of the electric machine and has an inner lateral surface, and - an inductive transformer comprising a primary coil (1) capable of being energized and a secondary coil (2) spaced apart from it, which can be electrically coupled to a winding of the rotor, - a rolling bearing (5) by means of which a rotor shaft (7) is rotatably mounted relative to the housing part (6), wherein the primary coil (1) of the inductive transformer (5) is positioned on the housing part (6) in a rotationally rigid manner relative to it, and the rolling bearing (5) is arranged within the housing part (6) such that the primary coil (1) and the rolling bearing (5) are arranged coaxially, characterized by the fact that the secondary coil (2) of the inductive transformer is arranged inside a transformer housing (8) on the inner outer surface, wherein the housing is connected to the rotor in a rotationally fixed manner and the secondary coil (2) is arranged in axial overlap with the primary coil (1).

An axial flux switched reluctance motor and / or generator, and controls are provided, it includes a stator, which includes a front surface and a rear surface, ano sidewalls that extend from the front surface to the rear surface The stator includes salient stator poses positioned on the front surface. Each one of the salient stator poses including: a bobbin protruding out from the front surface in a direction along an axis of the bobbin that is perpendicular to the front surface; the bobbin comprising a bobbin front surface that is substantially parallel to the front surface of the stator; and a coil of electrically insulated wire wound around the bobbin. A rotor includes a front rotor surface and an opposite facing rear rotor surface, and further includes a plurality of rotor poles. The rotor is affixed to a shaft and rotates about an axis of rotation that is aligned with the shaft.

The object of the present invention is to provide a power generating device that can reduce the burden and cost of winding work and is suitable for large-scale construction. The power generating device of the present invention includes a force-receiving rotor that rotates under fluid force, a shaft base that rotates with the rotation of the force-receiving rotor, and a generator that generates electricity using the rotational force of the shaft base, wherein the generator includes a rotor arranged on the outer side of the shaft base around its axis so as to rotate together with the shaft base, a stator arranged on the outer side of the shaft base around its axis so as not to rotate together with the shaft base, and an exciter arranged on the outer side of the shaft base around its axis so as not to rotate together with the shaft base, the rotor includes a rotor base fixed to the shaft base and rotating together with the shaft base, and a plurality of magnetic pole cores arranged in an annular shape on the rotor base, and the exciter includes an annular field coil that excites the magnetic pole cores.

The method of fault detection of the rotary rectifier (4) of the brushless synchronous machine (6) is based on the measurement of a phase field current (3) on the stationary side of the excitation source (2). Further, a frequency analysis (12) is used to determine the amplitude of the fundamental harmonic and the amplitude of all non -zero integer multiples of the fundamental harmonic frequency from the measured signal. The per-unit fault factor X i is calculated, the fault-free reference per-unit factor X i_ref is measured and the fault reference per- unit factor X i_err is determined and the per-unit fault detection threshold X i_threshold is calculated. A fault is signalled in case the determined values of the per-unit fault factor X i are exceeded and / or rms value of the measured phase Held current (3) is outside the permitted operation range and / or the rms value of the back EMF of the synchronous machine (1) is lower than the one corresponding to the minimum permitted operation rms value of the phase field current (3).

In some implementations, a pole configuration device may dynamically control pole configurations of an electric machine. The pole configuration device may receive input data indicating information associated with the electric machine. The pole configuration device may determine, based on the input data, a desired pole configuration of the electric machine. The pole configuration device may control, based on the desired pole configuration, magnetic polarities of multiple virtual poles, included in a field circuit of the electric machine, and an armature configuration, of an armature circuit of the electric machine, to create a set of effective poles. The set of effective poles may include one or more virtual poles, of the multiple virtual poles, that are associated with generating at least one of a flux, a speed, a torque, or a power related to the electric machine.

The invention discloses a high-low voltage dual-voltage output generator for a plateau environment and application thereof. The high-low voltage dual-voltage output generator comprises a high-voltage generator and a low-voltage generator, a high-voltage stator and a high-voltage rotor are arranged in the high-voltage generator, the shell is installed through a high-voltage front end cover and a high-voltage rear end cover, and a high-voltage junction box is arranged outside the shell. A low-voltage fan, a low-voltage rotor and a low-voltage stator are arranged in the low-voltage generator, a low-voltage rear end cover is arranged behind the low-voltage generator, and a low-voltage junction box is arranged outside the low-voltage generator. And the low-voltage stator and the high-voltage rear end cover are mounted, butted and fixed. The invention has the following beneficial effects: when the generator is applied to plateau areas with insufficient power grid coverage, the generator only needs to be combined and assembled with one diesel engine to form a unit, so that the hybrid power utilization requirements of industrial high voltage 10kV and civil low voltage 400V can be met at the same time, and the occupied space is reduced.

The invention relates to an axial flux electrical machine (10) rotating about an axis of rotation (X) comprising: at least one homopolar rotor (11), rotatable, with p poles comprising: an annular disc (15) with an axis of symmetry coincident with the axis of rotation (X), p / 2 upper clamps (16) and p / 2 lower clamps (17), p being an even integer, the upper clamps (16) being radially further from the axis of rotation (X) than the lower clamps (17), the lower clamps (16) and the upper clamps (17) being circumferentially alternating, at least one concentric rotor winding (20) mounted radially between the upper clamps (16) and the lower clamps (17), the upper clamps (16) and the lower clamps (17) not being axially opposite the rotor winding (20),the upper clamps (16) and the lower clamps (17) being capable of being polarized under the effect of a rotor current (Ir) circulating in the rotor winding (20) so as to form p poles of the rotor (11), and at least one stator (12), fixed in rotation, comprising at least one stator coil (30), characterized in that the rotor winding (20) is fixed in rotation. Figure for the abstract: Fig. 3,

To provide a rotary electric machine that can reduce an eddy current loss generated in a holding member.SOLUTION: A rotary electric machine comprises: a stator having a stator winding; a rotor 60; a field magnet winding; and a holding member 90. The rotor 60 includes: a rotor core 61; and a main electrode part 62 projecting in a radial direction from the rotor core 61. The filed magnet winding is wound on the main electrode part 62. The holding member 90 is provided between the main electrodes 62 that are adjacent in a circumferential direction, and is attached to the rotor 60 and covers the field magnet winding from the stator side. The holding member 90 is formed of plate members made of a metal material stacked in an axis direction.SELECTED DRAWING: Figure 5

To provide a rotating electric machine such as a motor or a generator which avoids a change in a magnetic flux direction adjacent to an air gap.SOLUTION: The disclosed improvements may be applied to a permanent magnet alternator, an induction motor and a generator, a doubly fed induction generator etc. Adaptation of coils to and fixation within required slot geometries are disclosed. Excitation systems collocated within a primary stator core and a primary stator core are also disclosed. Use of rubber vulcanized to the rotor in conjunction with a stainless steel rotor sleeve is also disclosed.SELECTED DRAWING: Figure 4a

A system and method for selective activation and deactivation of electrical brushes used in a dynamoelectric machine for current density optimization is disclosed. The approach includes using an arrangement of switches electrically connected to the electrical brushes to selectively activate and deactivate the brushes during the operation of the dynamoelectric machine. This entails opening and closing selective ones of the switches for a predetermined time period to adjust the average current density of the electrical current passing through the electrical brushes to be within a predetermined current density range while the dynamoelectric machine is operating.

The invention relates to a contactless energy transmission device (1) for a rotor (2) of an electric machine (3), in particular a separately excited synchronous machine within the drive train of a motor vehicle, comprising an inductive transformer (4) which has a primary winding (5) that can be supplied with current and a secondary winding (6) that is spaced apart therefrom and can be electrically conductively coupled to a winding of the rotor (2), wherein the primary winding (5) is accommodated in a primary flux-conducting element (7); the secondary winding (6) is accommodated in a secondary flux-conducting element (8); the primary flux-conducting element (7) is connected to a primary metal support element (9); and the secondary flux-conducting element (7) is connected to a secondary metal support element (10), a shielding layer (11) being provided between the primary winding (5) and the secondary winding (6), and a low-impedance line (12) being guided from the connection point (13) between the shielding layer (11) and the primary metal support element (9) to the power electronics (14) in order to establish a direct return path for the capacitive coupling path.

A rotor stack is formed as a combination of axially stacked rotor laminates, each having truncated rotor sections on its outer circumference and along a quadrature axis Elongated, substantially elliptical reinforcement members are inserted through the truncated rotor sections in a form-fitting manner, extending axially to reinforce the rotor laminates against structural deformation. The rotor laminates include flux barrier groups with spaced-apart slots configured to receive substantially tubular reinforcement members. Substantially circular mounting plates are positioned at predetermined positions of the rotor stack, each having elliptical slots and spaced-apart slots symmetrically aligned with those on the rotor laminates to guide and support the elliptical and tubular reinforcement members. The elliptical and tubular reinforcement members in combination create a reinforcement structure that enhances the mechanical integrity of the rotor stack, maintains alignment of the rotor stack, and enables high-speed operation of the rotor stack with reduced structural deformation.

The invention relates to a brushless starter-generator (1) comprising: - a main electrical machine (10) having a stator (11) comprising stator windings (12a, 12b, 12c) and a rotor (13) comprising a rotor winding (14) and intended to be mechanically coupled to the combustion engine (200); - an exciter (20) comprising a stator winding (24) and rotor windings (23a, 23b, 23c) connected to the rotor winding (14) of the main electrical machine (10), the rotors of the main electrical machine (10) and of the exciter (20) forming the rotor (75) of the starter-generator; and - a regulator (50) configured to supply the stator winding of the exciter with AC voltage with duty cycle modulation of alternation width when the starter-generator operates in starter mode, the regulator being configured to vary the duty cycle so as to vary an excitation delivered by the rotor (22) of the exciter to the rotor winding of the main electrical machine.

An electrical machine (2), designed as a separately excited synchronous machine, by means of which a drive torque for a motor vehicle (1) can be generated and which can be connected to a drive train (3) of the motor vehicle (1), comprising a static section (11) and a rotor (9) rotatably mounted relative to the static section (11), wherein the rotor (9) has at least one detection device (19) for detecting and / or generating at least one item of rotor information (18) relating to the operation of the rotor (9), wherein the static section (11) has a control device (36) which is configured to generate control signals (37) for controlling the operation of the electrical machine (2) as a function of the at least one item of rotor information (18),wherein the at least one item of rotor information (18) is transmittable from the at least one detection device (19) to the control device (36) via a transmitter (33) of the rotor (9) and a receiver (35) of the static section (11), wherein the at least one item of rotor information (18) is transmittable contact-free and by means of optical signals from the transmitter (33) to the receiver (35).

Wound discoid rotor 1 for electric machine 100 with axial magnetic flux consisting of: two flanges 10a, 10b made of composite material and a steel ring 20, assembled by two series of rivets 50, 51 and forming an annular chamber 10c; rotor cores 30, in even number, supported at each end by the flanges 10a, 10b, and each carrying a coil 40 arranged in the annular chamber 10c; two collectors 41, 42 connected one to the end of the wire 40a of each coil 40 and the other to the end of the wire 40b of each coil;of two electric current supply wires 43,44 connected one to the external collector 41, the other to the internal collector 42, characterized in that: each flange 10a,10b is pierced with as many inclined air inlet ducts 17a,17b as there are coils, close to the internal diameter 10d of the annular chamber 10c, connecting this annular chamber with the internal ambient space of the electric machine 100 contained in the casing 110 closed by the closing flange 111; the ring 20 has as many air outlet openings 21 as there are coils, creating a second communication between the annular chamber 10c and the internal ambient space of the electric machine 100 contained in the casing 110 closed by the closing flange 111, creating, during rotation of the discoid rotor a flow of cooling air from coils 40 entering through the inclined air inlet ducts 17a, 17b and exiting through the air outlet openings 21. Figure for abstract: Fig.2;