695results about "Synchronous motors" patented technology

An electric machine is provided. A transformer comprises a magnetic coupling. A wound field synchronous machine comprises a rotor winding, a secondary circuit of the transformer electrically connected to the rotor winding, and a stator winding. The secondary circuit comprises a secondary winding, a rectifier electrically, a switch for switching voltage between the rotor winding and the rectifier in a first direction, and an energy storage arranged to store energy provided by the rectifier and the rotor winding and provide a voltage to the rotor winding in a second direction. A power converter is coupled between the power supply and the wound field synchronous machine. The power converter comprises a stator winding power supply arranged to provide multiple phase AC excitation to the stator winding and a primary circuit of the transformer comprising a primary winding arranged to provide AC power to the primary winding.

A self-excitation motor disclosed by the present invention comprises a rotor, a first end of the rotor is equipped with a rectification circuit, the rotor comprises a rotor iron core and a plurality of harmonic windings and excitation windings, the rotor iron core is provided with rotor teeth, and each harmonic winding and each excitation winding are respectively wound on the corresponding rotor teeth. Each harmonic winding comprises a first harmonic winding and a second harmonic winding, the winding directions of the first harmonic winding and the second harmonic winding are the same, star connection is adopted, one ends of the first harmonic winding and the second harmonic winding are connected in series in a one-to-one mode, and the other ends of the first harmonic winding and the second harmonic winding are jointly connected to form a star neutral point; the other end of each second harmonic winding is connected with the midpoint of each bridge arm in the rectifying circuit in a one-to-one manner; the winding directions of the excitation windings on every two adjacent rotor teeth are opposite, and the two ends of each excitation winding are electrically connected with the direct current output end of the rectification circuit. This induces and rectifies the current for excitation more efficiently. The invention further provides a motor control strategy based on high-frequency harmonic current phase optimization.

A motor includes a stator having a winding that when selectively energized produces an electromagnetic field within a rotor cavity, and a rotor disposed within the rotor cavity of the stator and in electromagnetic communication with the winding and the electromagnetic field. The rotor includes a drive shaft, a rotor body that extends around the drive shaft and that defines a plurality of reluctance voids, and magnet inserts that are disposed within the reluctance voids. The magnet inserts occupy at least a portion of a space defined by the reluctance voids. The magnet inserts and the reluctance voids cooperate with the electromagnetic field to produce an electromagnetic torque.

Rotor (2) for an electric machine, comprising several pole sections (1) extending radially away from an axis of rotation, which have winding sections (4) on which windings are arranged or can be arranged, wherein the pole sections (1) of the rotor (2) are designed as independent individual segments (3) which are arranged circumferentially in an assembled state of the rotor (2).

The invention relates to the technical field of motors, in particular to a synchronous reluctance motor rotor and a synchronous reluctance motor, the synchronous reluctance motor rotor comprises a rotor core, a plurality of magnetic barrier layer groups are arranged on the rotor core, the plurality of magnetic barrier layer groups are uniformly distributed along the circumferential direction of the rotor core, and each magnetic barrier layer group comprises a plurality of magnetic barrier layers arranged at intervals along the Q-axis direction; the magnetic barrier layers are asymmetrically arranged on the rotor core relative to the Q axis and are divided into strong magnetic resistance sides and weak magnetic resistance sides, and the strong magnetic resistance sides and the weak magnetic resistance sides in the plurality of groups of magnetic barrier layers are alternately distributed along the extension path of the magnetic barrier layers so as to form a magnetic flux path of an S structure. According to the invention, the characteristic that the magnetic flux is always closed along the path with the minimum magnetic resistance in the synchronous reluctance motor is utilized, and the strong magnetic resistance sides and the weak magnetic resistance sides in the plurality of groups of magnetic barrier layers are alternately distributed to form the magnetic flux path of the S structure, so that the magnetic flux is more concentrated and uniform, and the S-shaped structure can reduce the torque pulsation caused by the non-uniform magnetic field.

A motor includes a rotor, a stator, a casing accommodating the rotor and the stator and including an opening in an axial end, an upper bus bar assembly including an upper bus bar holder mounted on an edge of the opening of the casing and an upper bus bar (including an upper bus bar terminal) held on the upper bus bar holder, and a lower bus bar assembly including a lower bus bar holder located on an axially lower side of the upper bus bar holder and a lower bus bar (including a lower bus bar terminal) held on the lower bus bar holder. The upper bus bar terminal and the lower bus bar terminal are electrically connected inside the casing.

An electric machine for a motor vehicle is disclosed, and may include a stator, a rotor rotatably mounted with respect to the stator and having rotor windings for generating a rotor magnetic field, and an active rectifier provided on the rotor. The active rectifier may electrically connect a voltage source present on the rotor to the rotor windings, and may be configured to convert an alternating voltage provided by the voltage source into a direct voltage. The direct voltage may be configured to be utilized during generation of the rotor magnetic field by the rotor windings. The active rectifier may be arranged on or in a cooling section of the rotor. The cooling section may form a heat sink through which a cooling fluid can flow.

To provide a control device for a rotary electric machine capable of reducing a torque ripple of generation torque of the rotary electric machine, and a program.SOLUTION: A control device 30 calculates a composite current by superposing a higher harmonic current for inducing a magnetic field current in magnetic field coils of a rotor of a rotary electric machine 40 on a fundamental wave current to flow to stator coils 52U-52W of the rotary electric machine 40 and performs switching control of an inverter 20 to make the calculated composite current flow to the stator coils 52U-52W. The control device 30 calculates the composite current under the condition that a frequency of an envelope of the higher harmonic current is equal to a frequency of the fundamental wave current and the condition that a phase difference between the envelope and the fundamental wave current is made into a predetermined phase difference, and the predetermined phase difference is set to a phase difference for which e.g., an electric angle is 50° or more and 90° or less.SELECTED DRAWING: Figure 2

A method for manufacturing an electrically excited rotor is described. The method comprises providing a rotor body with electrically conductive windings and potting the rotor body with a potting compound, such that an electrically conductive winding interface remains accessible. Furthermore, following the potting, the method includes connecting the winding interface to an electrical power supply to provide an excitation current for the windings.

Disclosed are a non-contact rotary transformer and a motor comprising same. A non-contact rotary transformer according to the present invention is a device for connecting a rotor of a motor with an external power source in a non-contact manner, and is characterized by comprising: a core part disposed inside a hollow motor shaft in a coaxial structure with the motor shaft; a primary coil part installed on the outer circumferential surface of the core part; a secondary coil part which is installed on an inner main surface of the motor shaft and surrounds the primary coil part at a predetermined interval (air gap) therefrom; and a rectifier circuit part which is coupled to the motor shaft and rotates in synchronization therewith, and which is electrically connected to the secondary coil part.

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.

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.

The invention discloses a three-pole suspension stator type permanent magnet bearingless switched reluctance motor and a control method, torque stators with the same phase number are arranged between suspension stator teeth of the motor, and permanent magnets are tightly arranged between the suspension stator and the torque stators to generate bias magnetic flux required by suspension; the cogging torque generated by the permanent magnets is small, and the torque generated by the torque winding is promoted; three teeth of the suspension stator are respectively wound with a suspension winding, one ends of the three suspension windings are connected together, and the other ends of the three suspension windings are connected into the three-phase full-bridge inverter. In the control process, two equivalent current given values which are perpendicular to each other can be obtained after the displacement ring is adjusted, the given value of the three-phase suspension winding current can be obtained only after current conversion, two radial suspension forces can be adjusted in real time through current chopping control, control is easy, and implementation is convenient. According to the invention, the motor torque is decoupled, the torque is short in magnetic circuit, and the suspension force / current ratio is large; the permanent magnets can be made of ferrite permanent magnet materials, cost is low, and application prospects are good.

A motor system may comprise: a plurality of drives configured to drive a plurality of stator windings; a stator assembly comprising the plurality of stator windings arranged along a circumference of a stator core, wherein each of the plurality of drives is evenly connected to one of the plurality of stator windings over the circumference of the stator core; and a rotor assembly configured to be rotatable relative to the stator assembly. Each of the plurality of drives is connected to at least one of stator windings located at one half side of the stator core among the plurality of stator windings and each of the plurality of motor drives is connected to at least one of stator windings located at another half side of the stator core among the plurality of stator windings. Each of the plurality of motor drivers comprises an inverter.

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

Provided is a rotary electric machine that meets a required maximum performance and improves efficiency in a low-torque region without an increase in size.　A rotary electric machine (1) has a first rotary drive unit (200) and a second rotary drive unit (300) that share a rotary shaft (20). The first rotary drive unit is a radial gap–type rotary drive unit that comprises a first stator (220) and a first rotor (210), and the second rotary drive unit is an axial gap–type rotary drive unit that comprises a second stator (330) and a second rotor (310) that includes a second rotor core (311) and a second rotor magnet (312) and is fastened to the rotary shaft on the first rotary drive unit side of the second stator at a gap in the axial direction.

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

The invention relates to an inductively excited synchronous machine (1) with a stator (2), with a rotor (3) rotatably mounted on the stator (2) about an axis of rotation (4), with a rotary transformer (5) having a stator-fixed primary coil (6) and a rotor-fixed secondary coil (7), and with a rotor-fixed rectifier (8), wherein the rotor (3) has a rotor shaft (9), a rotor lamination stack (10) arranged on the rotor shaft (9) and a rotor winding (11) arranged on the rotor lamination stack (10), and wherein the rotor winding (11) has a winding head (14, 15) projecting axially beyond the rotor lamination stack (10) and spaced radially apart from the rotor shaft (9) at each axial end face (12, 13) of the rotor lamination stack (10). A compact design can be achieved if the rotor (3) has a winding carrier (16, 17) on each axial end face (12, 13) of the rotor lamination stack (10), which rests axially on the rotor lamination stack (10) and on which the respective winding head (14, 15) rests axially and radially on the outside, and if one of the winding carriers (16, 17) has a rectifier receptacle (18) in which the rectifier (8) is arranged.

Rotating electric machine (1) with a central longitudinal axis (1C), comprising: a stator (100) comprising armature coils (104) wound around the stator (100) with concentrated winding, the armature coils (104) being configured to generate magnetic flux when excited; and a rotor (300) which is rotatable about the central longitudinal axis (1C) in response to the flow of the magnetic flux, wherein the rotor (300) comprises a plurality of salient poles (302) which are wound by rotor windings (330) which are capable of inducing at least one induced current when the magnetic flux couples with the rotor (300), wherein the rotor (300) comprises at least one rectifier circuit (C1 to C6), wherein the rotor windings (330) are wound such that the salient poles (302) can operate as electromagnets whose magnetization directions are alternately reversed along an arc length of a circle around the central longitudinal axis (1C), wherein each rectifier circuit forms a closed circuit consisting of a group of rotor windings (330), wherein in each group some of the rotor windings (330), whose current phases of the induced current are the same, are connected in series with a rectifier element (D1 to D8), wherein the rotor windings (330) are either divided into four groups such that in each group all rotor windings (330) are connected in series with a rectifier element to form a rectifier circuit or the rotor windings (330) are divided into two groups such that each group comprises several series circuits, of which a first and a second series circuit are connected in parallel and each of these first and second series circuits is connected in series with a rectifying element.

To provide a rotor for electromechanical applications that has improved magnetic properties, high mechanical stability, and / or a long service life. [Solution] The rotor 10 includes a plurality of recesses 12 spaced radially apart from each other to form a flux barrier, the recesses 12 extending in a U-shape from the outer circumference 14 of the rotor toward the rotor center 16 to a vertex 18 and back to the outer circumference 14 of the rotor. The recesses 12 are divided into an odd number of recess regions 22 by an inner bridge 20, and in each recess 12, one central recess region 22a and two outermost recess regions 22b are not filled with filler, and between the central recess region 22a and the outermost recess regions 22b there is at least one recess region 22c filled with magnetic filler. Furthermore, the present invention relates to an electromechanical device or a drivetrain for an automobile comprising the rotor 10 described above and at least partially electrically driven.

An externally excited electric machine includes an exciter power circuit connected to a rotor winding, a stator power circuit connected to a stator winding, an exciter control circuit connected by at least a first connector to the exciter power circuit, and a stator control circuit connected by at least a second connector to the stator power circuit. The exciter control circuit and the stator control circuit are mounted on a common circuit board. The first connector is connected to a first electrical contact of the exciter power circuit, and the second connector is connected to a second electrical contact of the stator power circuit. The first electrical contact and the second electrical contact are at different heights in relation to the circuit board. The first or the second connector has a geometrical form that bridges over a height difference between the first electrical contact and the second electrical contact.

Disclosed herein is an electric vehicle comprising: an electric motor switchable between a first mode having a first number of poles and a second mode having a second number of poles smaller than the first number of poles; a plurality of inverters coupled to the electric motor; and a control module coupled to the plurality of inverters. The control module receives current vehicle information, determines based on the current vehicle information that a mode switch is required between a first mode and a second mode of the electric motor, wherein the first mode achieves higher torque than the second mode; and performs the mode switch by controlling the inverter.

An electric machine (1) for a motor vehicle is provided, wherein the electric machine (1) comprises a rotor (20) having a rotor lamination stack (22), and a stator (10) having a stator lamination stack (12). The stator lamination stack (12) surrounds the rotor lamination stack (22) at a distance. A distance (A) between the stator lamination stack (12) and the rotor lamination stack (22) varies in a step-like manner along an axial direction (R) of the rotor (20).

The present invention relates to a rotor (118) for an electric machine (102), preferably configured as an externally excited synchronous motor, comprising a rotor shaft (150) and a rotor core assembly (140) that is rotationally fixed to the rotor shaft (150), wherein the rotor core assembly (140) comprises several poles distributed in a circumferential direction, each configured to be wound by a rotor coil (154), wherein the rotor (118) has an axial limit (136) attached to an axial end face (152) of the rotor (118), and wherein a supply line (146) of the rotor (118) is guided axially at the axial limit (136). The present invention further relates to an electric motor (102) and an at least partially electrified vehicle (100).

The utility model relates to the technical field of squirrel-cage synchronous motors, in particular to a rotor punching sheet and a stator punching sheet on a squirrel-cage synchronous motor of a refrigerator compressor, which comprise 24 stator grooves including two special-shaped grooves A and two special-shaped grooves B, two punching sheet yoke parts 1 form a tip structure of the stator punching sheet, and the included angle of the tip end of the rotor groove is set to be 150-165 degrees. According to the technical scheme of the utility model, one side of the stator punching sheet structure adopts the traditional long-edge design, the other side adopts the pointed-end structure, and four of the 24 slots adopt the special-shaped slot design, so that the size rationality of the yoke part of the motor is ensured, the rationality of the magnetic circuit of the motor in design is ensured, the utilization rate of silicon steel of the motor is improved, and the consumption of silicon steel is reduced; the groove-shaped tooth tip parts of the rotor punching sheet are distributed at 150-165 degrees, and on the premise that the tooth width and the groove-shaped length of the rotor are not changed, the cast aluminum volume of the rotor is improved, so that the impedance of the rotor is improved, the magnetic flux density of the rotor is increased, the maximum torque of the motor is improved, and the starting performance of the compressor is improved.

A winding excitation type rotating electric machine (40) includes a stator (50) including a stator winding (52), and a rotor (60) including a plurality of magnetic poles arranged in a circumferential direction and including an excitation winding (70) provided on each of the magnetic poles. A control device (30) is provided with: a control unit for controlling a stator current flowing through a stator winding and an excitation current flowing through an excitation winding; and an acquisition unit that acquires a rotation parameter indicating the rotation state of the rotor. The control unit controls the magnitude of the excitation current and the phase of the stator current on the basis of the rotation parameter, and increases the excitation current when in a high-speed rotation state in which the rotation speed of the rotor is higher than a predetermined rotation speed than when not in the high-speed rotation state. And the phase of the stator current is controlled to be a weak excitation phase for weakening the excitation magnetic flux of the excitation winding.

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.

To provide a technique capable of preventing deformation of a conductive member fixed to a rotor.SOLUTION: A winding field motor includes: a rotor that is fixed to a motor case and includes a stator that generates a magnetic field by energization, a rotor core around which a field coil is wound, and a rotor shaft to which the rotor core is assembled, is disposed on an inner diameter side of the stator and relatively rotatable with respect to the stator; and a power supply device that includes a rotor and a stator that rotate integrally with the rotor shaft, and is electrically connected to the field coil by a conductive member. The winding field motor is configured so that the conductive member extends toward an outer diameter side of the rotor, and the rotor includes: a fixing part that fixes the conductive member to the rotor; and a restricting part that restricts the movement of the conductive member in a direction away from the rotor on an inner diameter side of the fixing part.SELECTED DRAWING: Figure 1