334results about "Synchronous generators" patented technology

The invention relates to a device (100) for wireless electrical power and / or communication transmission for an electric machine (50), in particular for a separately excited synchronous machine, comprising at least a first transmission unit (10, 12) which is arranged stationary in spatial proximity to the electric machine (50), in particular on a housing (52) of the electric machine (50), and a second transmission unit (20, 22) which is arranged on a rotating part (54), in particular a shaft (56), of the electric machine (50). The first transmission unit (10, 12) and the second transmission unit (20, 22) are configured for capacitive and inductive coupling by means of electric and / or magnetic and / or coupled electromagnetic fields, wherein the first transmission unit (10, 12) and the second transmission unit (20, 22) are resonantly tuned to each other.The first transmission unit (10, 12) and the second transmission unit (20, 22) are optionally configured as a transmitting unit (14) or as a receiving unit (24) during operation of the electric machine (50). The invention further relates to an electric machine (50) with a device (100) and a drive system (200).

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.

Aircraft electric machines are described. The aircraft electric machines include a laminated rotor operably connected to a shaft, the laminated rotor comprising a plurality of rotor teeth and air gaps defined between adjacent rotor teeth about a circumference of the laminated rotor, a modular stator assembly comprising at least one stator segment having a winding wrapped about a center body of the at least one stator segment, a cooling element arranged at least one of adjacent to or within the winding, and at least one power module system comprising an active rectifier and wherein the laminated rotor and modular stator are arranged as a switched reluctance rotor-stator assembly.

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.

An electric machine including a stator having a plurality of stator windings configured for generating a magnetic field and a rotor configured for rotating within the stator according to a torque induced by the magnetic field. The rotor includes a plurality of electrically independent rotor winding sets wrapped around each of a plurality of circumferentially spaced rotor protrusions. The electric machine further includes a power transfer circuit operable for independently controlling electrical excitation of the rotor winding sets. The electric machine further includes a cooling system for dissipating heat way from the rotor winding sets.

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

Synchronous electric machine with fixed claw inductor. One aspect of the invention relates to a synchronous electric machine (M1, M1', M1'', M1''', M2, M2', M20, M21, M20') comprising: a first stator claw inductor (1, 1', 4, 4') comprising a ferromagnetic claw body (11, 41) comprising a number Pe of poles, a first stator armature (2, 2', 2u, 5, 5', 5u) comprising a number Pa of poles different from the number Pe, a ferromagnetic rotor (3, 6, 6') comprising: a rotation axis (X), a first set of ferromagnetic parts (30, 30u, 60, 60u) comprising a number Ns of parts regularly distributed around the rotation axis (X), the number Ns being equal to the sum of or the difference between Pa / 2 and Pe / 2, the set of ferromagnetic parts (30, 30u, 60, 60u) being located between the first stator inductor with claws (1, 1', 4, 4') and the first stator armature. Figure to be published with the abbreviation: Figure 2

Wound rotor of an electric machine provided with electrical connection devices The present invention relates to a rotor (1) for an electric machine, comprising a rotating shaft (100), a rotor body comprising at least one winding (200), and electrical connection devices intended to electrically connect the ends of the winding of the rotor (1) to an excitation system of the rotor (1), the rotor (1) being characterized in that at least one of the electrical connection devices comprises a radial connector (500) arranged in a radial recess of the rotating shaft (100) and an axial connector (700) arranged in an axial recess of the rotating shaft (100), and in that the rotor (1) further comprises means for fixing the radial connector (500) to the axial connector (700). (Figure 10)

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 disclosure relates to an electrically excited rotor (200) for an electric motor comprising an annular rotor core (201) comprising a circumferentially distributed winding (202), a hollow rotor shaft (10) accommodated by said annular rotor core (201), the rotor shaft (10) extending axially along a centre axis (c1). Further, the rotor (200) comprises a transformer device (20), an end-busbar (11) arranged to transmit said DC power to an end portion (12) of said winding (202). The end portion (12) of said winding is positioned at an interior (10a) of said hollow rotor shaft (10) wherein the end-busbar (11) contacts said end portion (12) at said interior (10a) of said hollow rotor shaft (10).

The invention relates to a synchronous electric machine (10) for aircraft, which comprises a stator (13) and a wound rotor (38) inserted into the stator, the stator comprising two sets of stator coils (47, 49) intended to be connected to different power converters, and the wound rotor comprising a rotor shaft (11) and two rotor coils (39, 40) each intended to be supplied with a different supply current. The two sets of stator coils are arranged in the stator in such a way that when a first set of stator coils (47) fails, the second set of stator coils (49) cooperates with at least the second rotor coil (40) supplied with the associated supply current in order to generate a mechanical torque on the rotor shaft, and so that the power converter connected to the first set of stator coils does not deliver any electrical power.

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 accomplish, in a rotary electric machine that includes a winding field-magnetic rotor to which power is supplied by a non-contact scheme, downsizing of a power supply device while causing a support member to support a circuit board at the rotor side.SOLUTION: A disclosed vehicular drive device includes: a stator; a winding field-magnetic rotor; and a power supply device that supplies power to the winding field-magnetic rotor by a non-contact scheme. The power supply device includes: a support member that rotates together with the winding field-magnetic rotor; and a circuit board supported by a support member. The circuit board includes: a positive-electrode-side circuit electrically connected to the positive-electrode side of a coil; a negative-electrode-side circuit electrically connected to the negative-electrode side of the coil; an insulation region between the positive-electrode-side circuit and the negative-electrode-side circuit; and one or more notches or holes in the insulation region. The support member includes one or more protrusions in the axial direction capable of being engaged with the one or more notches or holes.SELECTED DRAWING: Figure 3

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).

Assembly (0) for a rotary transformer rotor (4) of an electric rotary transformer (1) for inductive power transmission, in particular for a separately excited electric synchronous machine (100), which is in particular designed as a traction motor (120), - with a printed circuit board (8) which rotates about an axially extending axis of rotation (90) during operation, - with a transformer secondary coil (5) in which a transformer voltage is induced during operation by means of a transformer primary coil (3) of a rotary transformer stator (2) of the rotary transformer (1), - wherein the transformer secondary coil (5) is provided on the printed circuit board (8) and has at least one transformer conductor (9) of the printed circuit board (8), - wherein the at least one transformer conductor (9) extends from a spiral start (18) to a spiral end (19) surrounding the axis of rotation (90), in particular in a spiral shape,- with an electrical start terminal (20) for electrically connecting the spiral start (18) and an electrical end terminal (21) for electrically connecting the spiral end (19), characterized in that, - the circuit board (8) has the electrical start terminal (20) and the electrical end terminal (21), - the end terminal (21) is arranged radially offset from the spiral end (19), - a busbar body (22) having a busbar (23) extends outside the circuit board (8) and is rotationally fixed to the circuit board (8), - the busbar (23) electrically connects the spiral end (19) to the end terminal (21).

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.