513results about "Synchronous motors" patented technology

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.

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.

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.

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.

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 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 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

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 application provides a rotor assembly and a self-starting permanent magnet synchronous reluctance electric motor. The rotor assembly includes a rotor core 1, and in a cross section of the rotor core 1, the rotor core 1 includes slit grooves 2, a q-axis squirrel-cage groove 41, and permanent magnets 3, the q-axis squirrel-cage grooves 41 are provided at both ends of the slit grooves 2, the permanent magnets 3 are arranged in the slit grooves 2, at least the permanent magnets 3 located in the innermost layer in the d-axis direction are arranged asymmetrically with respect to the d-axis, and the offset direction of the permanent magnets 3 located in the innermost layer with respect to the d-axis is the same as the rotation direction of the rotor assembly.

A rotor (60), which is applicable to a wound-field rotating electric machine (40), includes: a rotor core (61) having main pole portions (62) provided respectively for magnetic poles aligned in a circumferential direction, each of the main pole portions protruding in a radial direction; and a field coil (70) wound on the main pole portions of the rotor core. Moreover, the field coil has a coil end part (CE) located axially outside the rotor core. An annular member (103, 104, 182) is provided, on a radially outer side of the coil end part, in such a manner as to surround the coil end part.

A motor that is a wound field synchronous motor and includes a rotor and a stator. The rotor includes a plurality of winding portions configured to have a preset cross-section for generating a uniform effective air gap. The winding portions are spaced from each other a predetermined distance apart along a circumferential direction of the rotor. A field coil is wound around the plurality of winding portions.

Power unit 10 consisting of a central electrical machine with axial magnetic flux comprising a single central stator 100, two lateral discoid rotors 200a, 200b and two discoid yokes 300a, 300b for closing the magnetic circuit, and two lateral reducers 400a, 400b driven by the discoid rotors, characterized in that the two rotors 200a, 200b are of the wound type and controlled independently providing traction performance in the event of poor grip and torque vector control when cornering. Figure for the abstract: Fig.1

The application provides a motor rotor and a self-starting synchronous reluctance motor. The motor rotor comprises a rotor core (1), and the rotor core (1) is provided with filling grooves and slit grooves (2). The filling grooves comprise non-independent filling grooves (3) and q-axis filling grooves (4). The non-independent filling grooves (3) are separated from the slit grooves in the same layer by a separation rib (5). The width of the separation rib (5) in the d-axis direction is L. The width of the end of the filling groove arranged in the same layer as the separation rib (5) close to the separation rib (5) is M. The relationship between L and M satisfies 0.2M≤L≤0.35M. Meanwhile, the width of the end of the slit groove (2) arranged in the same layer as the separation rib (5) close to the separation rib (5) is K, and K satisfies K≤M. According to the motor rotor, the mechanical strength of the rotor can be enhanced, the deformation of the rotor in the manufacturing process can be reduced, and the difficulty of the process manufacturing is reduced.

A motor (12) includes a stator (10) having a winding (14) that when selectively energized produces an electromagnetic field (164) within a rotor cavity (74), and a rotor (18) disposed within the rotor cavity (74) of the stator (10) and in electromagnetic communication with the winding (14) and the electromagnetic field (164). The rotor (18) includes a drive shaft (228), a rotor body (140) that extends around the drive shaft (228) and that defines a plurality of reluctance voids (122), and magnet inserts (162) that are disposed within the reluctance voids (122). The magnet inserts (162) occupy at least a portion of a space defined by the reluctance voids (122). The magnet inserts (162) and the reluctance voids (122) cooperate with the electromagnetic field (164) to produce an electromagnetic torque (170).

The application provides a self-starting synchronous reluctance motor, which comprises a stator assembly and a rotor assembly, the rotor assembly comprises a rotor core and a squirrel cage winding, the rotor core is stacked by a plurality of rotor laminations, the rotor laminations comprise filling slots, slit slots and shaft holes, the filling slots comprise non-independent filling slots located at both ends of the slit slots and independent filling slots located at the outer periphery of a q-axis; the stator assembly comprises a stator core stacked by stator laminations; the stator laminations comprise a plurality of stator slots, the central angle between the radially outermost end of the non-independent filling slots located at the adjacent two sides of a d-axis and the center of the rotor is a1, the central angle between a stator tooth and the center of the rotor is a2, and the following conditions are met: when Z is greater than or equal to 30, a1 is greater than a2; when Z is less than 30, a1 is less than a2. According to the application, the relationship between the magnetic flux channel and the stator slot can be effectively changed, the tooth slot effect and the current harmonic can be reduced, the torque ripple can be reduced, and thus the motor vibration noise can be reduced.

The application provides a self-starting synchronous reluctance motor rotor, a rotor assembly, a motor and a compressor, the self-starting synchronous reluctance motor rotor comprising a plurality of rotor laminations, the rotor laminations being provided with slit slots, filling slots and shaft holes, wherein the filling slots are arranged in the same layer as the slit slots; the distance d from the slit slot located at the outermost layer of the rotor q-axis to the outer circle of the rotor in the q-axis direction satisfies 0.08<=d / R<=0.16, wherein R is the radius of the rotor; the included angle alpha formed between the outer edge of the filling slot at the two ends of the slit slot located at the outermost layer of the rotor q-axis and the center of the rotor circle satisfies 0.2<=alpha / tau<=0.6, wherein tau is the pole pitch of the motor, that is, tau=180° / p, and p is the pole pair number of the motor. According to the application, the rotor magnetic circuit can be reasonably arranged, the saturation of the motor magnetic circuit is reduced, the influence of the air gap harmonic magnetic field on the squirrel cage is small, the loss of the motor caused by the harmonic magnetic field is reduced, and the efficiency of the motor is improved.

A motor driving apparatus (1) includes: an inspection execution unit (3) configured to perform inspection of a second main electrode in a state in which the second main electrode is pulled up or down by setting one of a second main electrode pull-down switch (61, 62, 63) and a second main electrode pull-up switch (51, 52, 53) in a conductive state, the inspection execution unit (3) being configured to perform inspection of the second main electrode in a state in which the second main electrode is pulled up or down by setting one of the second main electrode pull-down switch (61, 62, 63) and the second main electrode pull-up switch (51, 52, 53) in a conductive state; performing an abnormality check operation on at least one of the upper transistors (M1, M3, and M7), the lower transistors (M2, M4, and M8), and the motor (10); and a control circuit (3) configured to control a combination of on / off states of the upper transistor, the lower transistor, and motor relays (M9, M10, and M11) connected to the motor.