22results about "Synchronous generators" patented technology

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

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.

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).

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 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).

The invention relates to a stator (1) for an electric motor (2), comprising an electrical coil (3), a housing (4) which contains the coil (3) internally and has electrical connections (5) externally for controlling the coil (3) and / or for supplying power to the coil (3), and electrical cables (6) which pass through a housing opening (7) and electrically connect the coil (3) to the connections (5). The housing (4) is lined internally with a potting compound (8) in which the coil (3) is embedded. A simplified manufacturing process is achieved if the housing opening (7) is closed with a separate closing plate (9) which has a cable opening (10) for each cable (6) through which one of the cables (10) is passed, and if the potting compound (8) is in contact with an inner surface (11) of the closing plate (9) facing the coil (3) and surrounds the cables (6) from the coil (3) to the closing plate (9).

A rotary electric machine (40) is provided with a stator (50) having a stator winding (52); a rotor (60) having a rotor core (61) including a main pole part (62) provided at each of magnetic poles arranged in a circumferential direction, protruding in a radial direction, and a field winding (70) wound around the main pole part; and a rotary shaft (32) integrated with the rotor core, high frequency current flowing through the stator winding to induce a field current through the field winding. The rotary shaft is made of ferromagnetic material. The rotary electric machine is further provided with an axial winding (151) wound around the rotary shaft, being energized by the field current flowing through the field winding; and a magnetic flux detecting part (152) provided at an axial end of the rotary shaft, detecting a magnetic flux produced when energizing the axial winding.

The invention relates to a method for operating a multiphase electric machine (1), wherein a stator arrangement (21) provides regular phase windings (V, W) and a hybrid phase consisting of a plurality of hybrid phase windings (U1, U2) that each have one or more stator coils (23), wherein the electric machine (1) is operated with the following steps: - determining the phase voltages for the regular phase windings (V, W) and the hybrid phase; - determining an excitation alternating voltage to be set; - applying an excitation alternating voltage to the phase voltages for the hybrid phase windings (U1, U2).

The invention relates to a method for operating a multiphase electric machine (1), wherein a stator arrangement (21) provides regular phase strands (V, W) and a hybrid phase consisting of several hybrid phase strands (U1, U2) each with one or more stator coils (23), wherein the electric machine (1) is operated by the following steps: - Determining the phase voltages for the regular phase strands (V, W) and the hybrid phase; - Determining the excitation alternating voltage to be set; - Applying an excitation alternating voltage to the phase voltages for the hybrid phase strands (U1, U2).

The semiconductor device (S1) has a first external electrode (101) having an outer peripheral section (101s), which has a circular shape in top plan view and which is to be attached to an alternator (Ot). On the first external electrode (101) there mounted: a MOSFET chip (103); a control circuitry (104) to which voltages at or a current flowing between a first main terminal (103d) and a second main terminal (103s) of the MOSFET chip (103) is inputted and which generates, on the basis of the voltages or the current, a control signal applied to a gate (103g) of the MOSFET chip(103); and a capacitor (105) for providing a power supply to the control circuitry (104). The semiconductor device further has a second external electrode (107) disposed opposite to the first external electrode with respect to the MOSFET chip (103). An electrical connection is made between the first main terminal (103d) of the MOSFET chip (103) and the first external electrode (101), and between the second main terminal (103s) of the MOSFET chip (103) and the second external electrode (107). According to the invention, the capacitor (105) is mounted on the first external electrode (101) via an isolation substrate (106).

The invention relates to a power distribution busbar (4) for an electric motor for a motor vehicle, the busbar being intended to be interposed between a ball bearing (6) and a mechanical shaft (5) of the electric motor. It comprises a far end (9) equipped with means for connecting the power distribution busbar to a system (3) for contactless excitation of a wound rotor (2) of an electric motor, a near end (10) equipped with means for connecting the power distribution busbar to a wound rotor (2) of an electric motor, one or more branches (11, 12), and electric wires (13) inserted into axial passages produced in the branches (11, 12), making it possible to make electric contact between the contactless excitation system (3) and the wound rotor (2).

A self-excited brushless machine with compensated field windings includes a rotor and a stator. The rotor Includes a field winding secured to the rotor, an auxiliary winding secured to the rotor, and an energy converter associated with the rotor and configured to convert current between the field winding and the auxiliary winding. The stator includes a multiphase winding. The self-excited brushless machine uses a first current to generate a first magnetomotive force on a stator of the machine, and uses a second current to generate a second magnetomotive force. A third current is induced on auxiliary windings of a rotor of the machine using the second magnetomotive force. A rotor field winding of the machine is excited with the induced currents of the auxiliary windings.

A stator defines multiple stator poles with associated stator windings. A rotor defines multiple fixed rotor poles with associated teeth with a ferromagnetic material. The fixed rotor poles have associated rotor windings configured to be energized substantially by the stator. Each of the rotor windings is associated with the tooth. Each of the rotor windings includes an alternating current (AC) coil (or auxiliary coil) configured to carry an AC current induced by an AC current flowing in the stator. A direct current (DC) coil (or primary coil) defines a rotor field energizable by magnetic fields produced by the stator windings to produce relative forces between the rotor and the stator. The DC coil is at least partially powered or controlled by the AC coil.

A vehicle brushless alternator assembly that includes a claw pole rotor assembly having a pair of opposing pole pieces. The rotor defining an axis of rotation, each of the pole pieces having multiple 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. The assembly including a cylindrical stator including armature enveloping the magnetic claw poles, the stator arranged coaxially relative to the drive shaft. The field coil positioned relative to said rotor to generate magnetic flux and the field coil including a first field winding electrically connected with a second field winding by a switch such that: in a first operable configuration the switch operates to electrically connect the field windings in series during energization and in a second operable configuration the switch operates to electrically connect the field windings in parallel during energization.

In a wound-field rotating electric machine, a rotor (60) includes: a rotor core (61) having main pole portions (62) provided respectively for magnetic poles, which are aligned in a circumferential direction, and each protruding in a radial direction; and a field coil (70) wound on the main pole portions of the rotor core. The field coil has a first coil section (i.e., first coil modules 111) and a second coil section (i.e., second coil modules 112) that are connected in series with each other to form a series connection unit. Each of the first and second coil sections is wound on all of the main pole portions of the rotor core such that the first coil section is located on a side closer to a stator in the radial direction, whereas the second coil section is located on a side farther from the stator in the radial direction. The first coil section is connected in series with a capacitor to form a series resonant circuit, whereas the second coil section is connected in parallel with the capacitor to form a parallel resonant circuit. The volume resistivity of a conductor material of the first coil section is higher than the volume resistivity of a conductor material of the second coil section.

A rotating electric machine (40) includes a stator (50) having a stator coil (52) and a rotor (60) having a rotor core (61) and a field coil (70). The rotating electric machine is configured to have harmonic current flowing through the stator coil to induce field current in the field coil. The rotor further has a circuit module (102) provided around a rotating shaft (32) and connected with the field coil to form a resonant circuit together with the field coil, and a coil end cover (103, 104) covering a coil end part (CE) of the field coil which is located axially outside the rotor core. Moreover, the coil end cover is a balance adjustment member that adjusts weight balance of the rotor in the circumferential direction; and at least part of the coil end cover in the circumferential direction constitutes an adjustment portion where weight of the coil end cover has been reduced or increased.

The present invention relates to a compression limiter (133) for a converter arrangement (120) for providing a DC excitation current in a rotor (118), wherein the converter arrangement (120) comprises a transformer unit (128) with a primary winding and a secondary winding (131) and a rectifier connected downstream of the transformer unit (128), wherein the secondary winding (131) is mounted on a winding support (130), wherein the rectifier is received by a rectifier housing (132), wherein the compression limiter (133) for attaching the winding support (130) to the rectifier housing (132) comprises a flange section (135) and a plug-in part (134) extending from the flange section (135) in a longitudinal direction, wherein the compression limiter (133) has a longitudinal slot (138) extending continuously from the plug-in part (134) to the flange section (135).The present invention further relates to a converter arrangement (120) with such a compression limiter (133), a rotor (118), an electric motor (102) and an at least partially electrified vehicle (100).

A vehicle brushless alternator assembly comprising: a claw pole rotor assembly having a pair of opposing pole pieces, the rotor defining an axis of rotation, each of the pole pieces having a plurality of circumferentially spaced pole fingers extending axially, the pole fingers of the rotor alternating between north and south magnetic polarities upon energization of the field coil; a cylindrical stator comprising armature enveloping the magnetic claw poles, the stator arranged coaxially relative to the drive shaft; a field coil structured to be positioned coaxially within an internal cavity of said rotor to arrange the field coil in a spaced apart relationship relative to internal walls defining the internal cavity of the said rotor; and a housing assembly surrounding said cylindrical stator with the drive shaft being supported by the housing assembly wherein the field coil is fixedly mounted to the housing assembly.

The application discloses a multi-channel capacitive coupler and a multi-channel ISOP-CPT excitation system, the multi-channel capacitive coupler comprises multiple channels, each channel comprises a pair of emitter plates and a pair of receiver plates, each emitter plate and each receiver plate comprises two sub-plates, the two sub-plates belonging to the same plate are electrically connected through a wire, and the two sub-plates belonging to the same plate are located on the two sides of a baseline perpendicular to a rotation shaft. By setting the arrangement position and distance of the sub-plates, the application can eliminate the coupling influence between the channels and ensure the excitation performance of the excitation system.

The present invention relates to a compression limiter (133) for a converter arrangement (120) for providing a DC excitation current in a rotor (118). The converter arrangement (120) has a transformer unit (128) having a primary winding and a secondary winding (131) and has a rectifier connected downstream of the transformer unit (128), the secondary winding (131) being attached to a winding support (130), and the rectifier being accommodated by a rectifier housing (132). The compression limiter (133) comprises, for fastening the winding support (130) to the rectifier housing (132), a flange portion (135) and an insertion part (134) extending in a longitudinal direction from the flange portion (135), and the compression limiter (133) has a longitudinal slot (138) which extends continuously from the insertion part (134) into the flange portion (135). The present invention further relates to a converter arrangement (120) having such a compression limiter (133), to a rotor (118), to an electric motor (102), and to an at least partially electrified vehicle (100).

In a wound-field rotating electric machine, a rotor (60) includes: a rotor core (61) having main pole portions (62) provided respectively for magnetic poles, which are aligned in a circumferential direction, and each protruding in a radial direction; and a field coil (70) wound on the main pole portions of the rotor core. The field coil has a first coil section (i.e., first coil modules 111) and a second coil section (i.e., second coil modules 112) that are connected in series with each other to form a series connection unit. Each of the first and second coil sections is wound on all of the main pole portions of the rotor core such that the first coil section is located on a side closer to a stator in the radial direction, whereas the second coil section is located on a side farther from the stator in the radial direction. The first coil section is connected in series with a capacitor to form a series resonant circuit, whereas the second coil section is connected in parallel with the capacitor to form a parallel resonant circuit. The second coil section has a greater number of turns than the first coil section. An electrical conductor wire used for the second coil section has a smaller conductor cross-sectional area than an electrical conductor wire used for the first coil section.