132results 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.

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 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

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).

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).

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.

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

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.

Rotor (1) of an electrically excited synchronous machine (2) having a rotor body (4) that is rotatable about a rotor axis (3) and has multiple salient poles (5) arranged in the circumferential direction, each of the salient poles having a pole shaft (5.1). A single coil (6) of the winding (7) is placed around each pole shaft. A star disc (10) is provided on each of the two end faces of the rotor body (4), said star disc consisting of a ring portion (11), multiple tooth portions (12) protruding radially therefrom and winding receptacles (13) formed thereon for receiving a winding head of the single coil (6). In addition, connecting channels (15), which each run within the tooth portion (12) in the radial direction and are part of a cooling path (16) formed in the rotor (1), are formed in a star disc (10) and a pole cooling channel (17), which extends in the axial direction through the salient pole (5) and is fluidically connected to one of the connecting channels (15) in a star disc (10), is provided in each of the salient poles (5).

The invention relates to an energy transmission system, in particular a rotary transformer, for contactlessly transmitting electric energy into an excitation winding (6) of a rotor (5) of an electric machine (1), comprising a static primary unit (11) and a secondary unit (20) which can rotate about a transformer axis (21). The primary unit (11) has a primary winding (12) and a primary core (13), and the primary winding (12) is arranged, in the radial direction with respect to the transformer axis (21), between a circumferential section (13u) of the primary core (13) and a primary winding support (14), wherein the primary winding support (14) has a support inner circumference (14u) which faces away from the primary winding (12) and which surrounds an installation space for the secondary unit (20) and forms a first assembly opening (16) for axial insertion of the secondary unit (20).

A multi-stage generator for an aircraft is disclosed. The multi-stage generator has 5 generator shafts configured to rotate about an axis of rotation of the generator. The primary stage is configured to generate a power output of the generator by rotation of the generator shaft. The main exciter is configured to provide an excitation current to the winding of the main stage. The secondary exciter is configured to provide an excitation current to the winding of the main exciter. The secondary exciter is an axial flux permanent magnet generator (PMG). An aircraft including a multi-stage generator is also disclosed.

The present invention relates to a rotor assembly (2) for an inductively electrically excited synchronous machine (1). The rotor assembly (2) comprises a hollow shaft (3) rotatable about a rotation axis (RA), a rotor (4) and a secondary circuit (5) of an energy transfer device (6). The secondary circuit (5) comprises a rectifier (7) having a printed circuit board (10) and at least one electrical component (11) and a secondary coil (8). The rectifier (7) according to the invention is aligned transversely to the rotation axis (RA) and is mounted in a cavity (9) of the hollow shaft (3). The present invention also relates to a synchronous machine (1) comprising the rotor assembly (2).

The invention discloses an exciter structure with an auxiliary exciter function, relates to the technical field of exciters, and aims to solve the technical problems that in the prior art, an external device serves as an initial starting device, a system is difficult to start independently, and the working stability of an auxiliary exciter is insufficient. By arranging the auxiliary excitation winding assembly, when the rotor rotates, the auxiliary excitation rotor winding cuts the magnetic field to generate the initial alternating current, the excitation process can be automatically started without depending on an external power supply, a main excitation system does not need an additional starting excitation device, and after starting, the magnetism isolating cover prevents the main excitation high-intensity magnetic field from influencing the auxiliary excitation winding; and the alternating current is ensured to be continuously and stably output into the main excitation system. By arranging the auxiliary excitation winding assembly and the magnetism isolating cover, the excitation process can be automatically started without depending on an external power supply, so that the main excitation system does not need to be additionally connected with other starting excitation devices, and the stability of the auxiliary exciter is not influenced after the magnetic field is started.

A reluctance machine has a stator (3) and a rotor (1). The rotor (1) comprises an encapsulated body (17), which can rotate about an axis of rotation (15) of the rotor (1), and a plurality of flow guide segments (19). The flow guide segments (19) form poles of the rotor (1), are arranged in a circumferential direction about the axis of rotation (15), and are embedded in the encapsulated body (17).

In the method of detecting fault in excitation rectifier of synchronous generator (1), field current (3) on a stationary DC side of an excitation source (2), or voltage on a DC side of a. stationary rectifier (7), is measured. Further, a frequency analysis is used to determine from measured signal an amplitude of fundamental harmonic and amplitude of all non-zero integer multiples of fundamental harmonic frequency. A per-unit current fault factor X, or a per-unit voltage fault factor X u is calculated, a. reference fault-free per-unit current factor X i_ref or a reference fault- free per-unit voltage factor X u-ref is measured, and reference per-unit fault factor Xi_err or Xu_err is determined, and a. per-unit fault detection threshold Xi-threshold or X u threshold is determined. A. fault is signalled when determined values of the per-unit fault factor X i or X u are exceeded and / or the DC component of the measured field current (3) exceeds the permitted operation range and / or the rms value of the back EMF of the synchronous generator (1) is lower than the one corresponding to the minimum permitted operation field current (3).

The invention relates to a stator (1) for an electric motor (2), comprising an electric coil (3), a housing (4), the interior of which contains the coil (3) and the exterior of which has electrical connections (5) for controlling the coil (3) and / or for supplying energy to the coil (3), and electric cables (6), which are led through a housing opening (7) and electrically connect the coil (3) to the connections (5). The interior of the housing (4) is potted with a potting compound (8), in which the coil (3) is embedded. A simplified production process is provided if the housing opening (7) is closed by means of a separate closure plate (9) having a cable opening (10) for each cable (6), one of the cables (10) being guided through each cable opening (10), and if the potting compound (8) bears against the closure plate (9) inner face (11) facing the coil (3) and encloses the cables (6) from the coil (3) to the closure plate (9).

A vehicle brushless alternator assembly comprising a claw pole rotor assembly having a pair of opposing pole pieces with plurality of circumferentially spaced pole fingers extending axially, the pole fingers of the rotor alternating between north and south magnetic polarities upon energization of a field coil positioned relative to said rotor; a cylindrical stator arranged coaxially relative to the drive shaft and comprising armature enveloping the magnetic claw poles; the field coil comprising at least a first field winding electrically connected with at least a second field winding by a switching arrangement such that in a first operable configuration the switching arrangement operates to electrically connect the first and second field windings in series during energization and; in a second operable configuration the switching arrangement operates to electrically connect the first and second field windings in parallel during energization.

To provide a winding filed magnet rotor that can appropriately hold a field magnet winding through assembly of a ring-shaped member and ensure the performance of a rotary electric machine.SOLUTION: A rotor comprises: a rotor core that has a plurality of main pole parts arranged side by side in a circumferential direction; field magnet windings provided circling around the main pole parts; and a metallic ring-shaped member provided to enclose the main pole parts and the field magnet windings from the radial outside. When the pulling strength of the ring-shaped member of the rotor is defined as Ts (MPa) and the magnetic flux density at a magnetizing force of 5000 A / m as B50 (T), the ring-shaped member satisfies the relationship of Ts≥920*B50^2-2520*B50+2000 with B50<0.9, and satisfies the relationship of Ts≥230*B50^2-680*B50+900 with B50≥0.9.SELECTED DRAWING: Figure 12

An electric machine comprising a rotor having a rotor shaft and a brush module having a brush holder with at least one brush for energizing the rotor, wherein the brush module comprises a shaft journal which can be coupled reversibly mechanically to the rotor shaft of the electric machine and against which the brush lies.

The invention relates to a stator (2) of an electrically excited synchronous machine (1), comprising a multiphase stator winding (7) having a plurality of phase conductors (8) and comprising a primary part (10p) of an inductive transformer system (10) for transmitting electrical energy into an excitation winding (13) of a rotor (3) of the synchronous machine (1), wherein a primary transformer winding (14) of the primary part (10p) is formed by multiple hybrid phase conductors (8) of the stator winding (7) which, as hybrid conductors (9), serve both to generate a rotating field of a three-phase system for driving the rotor (3) and to generate a transformer field of the transformer system (10), characterised in that each hybrid conductor (9) of the stator winding (7) has two hybrid partial conductors (9.1, 9.2), which are located in two different stator partial windings (7.1, 7.2) and belong to the same phase (U, V, W), and in that each stator partial winding (7.1, 7.2) has multiple hybrid partial conductors (9.1, 9.2) of different phases (U, V, W), which are connected to a star point (15) in a star connection.

One aspect of the invention relates to a synchronous electric machine (M1, M1', M1'', M1''', M2, M2', M20, M21, M20') comprising: - a first clawed stator inductor (1, 1', 4, 4') comprising a clawed ferromagnetic 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: - an axis of rotation (X); - a first set of ferromagnetic parts (30, 30u, 60, 60u) comprising a number Ns of parts distributed regularly around the axis of rotation (X), wherein the number Ns is 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 clawed stator inductor (1, 1', 4, 4') and the first stator armature.