523results 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.

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

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.

Energy transfer system, in particular rotary transfer system, for contactless transmission of electrical 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 (15) rotatable about a transfer shaft (14), wherein the secondary unit (15) has a secondary winding (16), characterized by the fact that the secondary winding (16) of the secondary unit (15) is designed as an air coil and the secondary unit (15) is designed without a secondary core and that at least a secondary shield (17) of the magnetic field is provided on the secondary unit (15) to partially compensate for the deteriorated magnetic flux conduction.

Rotor of an electrically excited synchronous machine (2) with a rotor body (4) rotatable about a rotor axis (3), in particular a rotor lamination stack, which has several salient poles (5) arranged along a circumferential direction of the rotor (1), each of which has a pole shaft (5.1), wherein the pole shafts (5.1) of the salient poles (5) are each enclosed by a single coil (6) of an excitation winding (7), wherein a star disk (10) is provided on each of the two end faces of the rotor body (4), each of which has an annular section (11), several tooth sections (12) projecting radially from the annular section (11) and winding receptacles (13) formed on the tooth sections (12) for receiving a winding head of the respective single coil (6), wherein connecting channels (15) are formed in at least one of the star disks (10),which each extend radially in one of the tooth sections (12) with respect to the rotor axis (3) and are part of a cooling path (16) formed in the rotor (1), characterized in that at least in one of the salient poles (5) a pole cooling channel (17) extending axially with respect to the rotor axis (3) through the salient pole (5) is provided, which is flow-connected to one of the connecting channels (15) of one of the star disks (10).

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).

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.

The invention relates to an energy transmission system, in the form of a rotary transformer, for contactlessly transmitting electric energy into an excitation winding (6) of a rotor (5) of an electric machine (1), having a rotational axis (14). The rotary transformer has a static primary unit (11) and a secondary unit (15) which can rotate with the rotor. The secondary unit (15) has a secondary winding (16), wherein the secondary winding (16) of the secondary unit (15) is in the form of an air coil, thus the secondary unit (15) does not have a secondary core. Additionally, at least one secondary shield (17, 17.1, 17.2) for shielding the magnetic field is provided on the secondary unit (15) in order to partly compensate for the degraded magnetic flux guidance.

Disclosed are various embodiments for switched reluctance machines having a rotor comprising a plurality of rotor core assemblies configured to form a reluctance torque tunnel having at least a first reluctance tunnel segment and a second reluctance tunnel segment and a stator having a plurality of coils configured to form a coil winding assembly, the coil winding assembly positioned within the reluctance torque tunnel, such that at least one of the plurality of coils is surrounded by the first reluctance tunnel segment or the second reluctance tunnel segment, alternatively the rotor may be the coil winding assembly and the stator may be the reluctance torque tunnel.

An electrically excited machine that includes a machine rotor and an exciter device for the electrical excitation of the electrically excited machine. The exciter device can include at least one energy transfer system integrated in and / or arranged inside the machine rotor. The machine rotor can include a rotor winding. The electrically excited machine can also include a machine stator. The machine stator can be arranged outside of the electrically excited machine.

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

To suppress occurrence of trouble caused by receiving heat from a field winding regarding a capacitor which is disposed in an end of a rotor in an axial direction.SOLUTION: In a wound-field type rotary electric machine, a rotor 60 comprises a rotor core including a main magnetic pole part which is provided for each of magnetic poles arranged side by side in a circumferential direction, and a field winding 70 which is wound around the main pole part. The rotor 60 comprises a circuit module 102 including a plurality of capacitors 91 connected to the field winding. The circuit module 102 is provided at a position opposed to a coil end CE of the field winding 70 in an axial direction. The capacitor 91 is a laminated capacitor, in which a dielectric 151 and the internal electrode 152 are laminated, and disposed in such a direction that a lamination direction of the dielectric 151 and the internal electrode 152 is orthogonal to the axial direction of the rotor 60.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

Disclosed is a rotating electrical machine with axial air gap, comprising two rotors, each provided with superconducting axial magnetic flux barrier elements around an axis of rotation and having, between them, axial magnetic flux passage areas, at least one armature, comprising windings and a superconducting field coil surrounding the elements and the armature and capable of inducing an axial magnetic field. Each armature is positioned between two of the rotors. The superconducting elements of the rotors are coaxial with one another and also the flux passage areas. A first annular cryogenic enclosure encloses the field coil and a second cryogenic enclosure encloses the two rotors and the armature or only one rotor, with a third cryogenic enclosure around the other rotor without the armature.

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

A system and a method for exciting a generator of a direct current power supply with a controller is disclosed. The method includes receiving a phase voltages associated with multiphase output of the generator. The method includes determining a maximum line-to-line voltage based on the phase voltages. The method includes operating an exciter winding driver with an oscillating signal generated according to the maximum line-to-line voltage.

The invention relates to a three-stage brushless AC synchronous generator and a rotating rectifier. The rotating rectifier comprises a positive plate and a negative plate. The positive plate and the negative plate are two hollow discs with the same structure. Three diode mounting holes are evenly distributed on the positive plate and the negative plate. Six hollow rivet mounting holes are evenly distributed on the positive plate and the negative plate. A diode is installed in each diode mounting hole. The cathodes of the three diodes are electrically connected to the positive plate, and the anode ends of the other three diodes are electrically connected to the negative plate. Each diode is an avalanche type or a Zener type diode. Three V-shaped notches are evenly distributed on the outer periphery of the positive plate and the negative plate. The V-shaped notches correspond to the diode mounting holes of the corresponding plates one by one. The rotating rectifier also comprises three busbar components evenly distributed on the upper end of the reverse side of the positive plate. The components have good ventilation and heat dissipation properties, small size and light weight. The components are very fast and effective in absorbing magnetic field energy and suppressing voltage spikes of the excitation system.

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.