Stator of constant current electric machine with constant magnets |
|
IPC classes for russian patent Stator of constant current electric machine with constant magnets (RU 2306658):
      
 Electric motor / 2285998
Proposed motor has stator 1 and disk-type rotor 2. The latter is provided with commutator sleeve 11 specifically disposed on its supporting bush 12 and used to mount rotor 2 on shaft 10 of stator 1. Disposed on commutator sleeve 11 are commutator segments 13 that mount insulating disk 9 of rotor 2 carrying windings 14. Working surface of each commutator bar 13 engageable with brushes 7 is disposed on one end of fixation area 15 of rotor disk 9; mounted on other end of this area are radially bent-out leads 16 of commutator bars 13 electrically connected to leads 17, 18 of rotor winding 14. Radially bent-out leads 16 of commutator bars 13 are disposed in area of cylindrical axial depression 19 of rotor disk 9 communicating with through holes 20 of rotor disk 9 in direction radial to geometric axis of commutator sleeve 11. Rotor windings 14 are placed in holes 2 of disk 9. At least one lead 17 of each winding 14 is passed through slit 24 from through hole 20 of disk 9 to axial depression 19 of rotor disk 9. One of leads 18 of each rotor winding 14 may be also disposed on coil surface of winding 14 and enter axial depression 19 of rotor disk 9.
 Pulsed inertial motor / 2285997
Proposed motor has stator with magnetic core carrying even number of permanent magnets equally spaced apart. Rotor carries even number of electromagnets disposed in pairs opposite one another. Distribution commutator is mounted on stator frame and has conducting segments disposed over circumference and connected in alternating polarity manner to dc power supply; they are separated by insulating gaps. Current collectors contact commutator segments and each of them is connected to like-polarity leads of coils of respective electromagnets, each having two coils wound in series opposition. Coils of adjacent electromagnets are connected in series and coil leads of opposing electromagnets are interconnected and not connected to current collectors. Number n of stator permanent magnets and number m of rotor ones are chosen to meet equation n = 10 + 4k, where k = 0, 1, 2, 3, ..., m = 4 + 2L, where 0 ≤ L ≤ k.
 Magnetoelectric machine / 2264025
All magnetoelectric machines are characterized in absence of field coils and excitation loss is impossible in them. That is why they are much more economically efficient then electromagnetic machines, other conditions being equal. Proposed machine has its fixed part incorporating frame, removable sections constituting cylindrical part of frame designed for locating, fixing, and locking machine coils. Sections are screwed to frame to enhance stiffness of the latter. Coils are locked by means of holders and attached to removable section wall. Movable part of machine is rotor built of two plate-shaped disks provided with annular groove whose shape follows that of magnets installed therein. Rotor strength is enhanced by rigidly fixing its disks to cylindrical support passed near annular groove and to central bushing mounted on shaft through splined joint. Type of fixation may be different depending on mass and shape of magnets.
 Stator magneto dc machine / 2138110
The invention relates to the field of electrical engineering, in particular to the design of magneto-electric machines, DC
 Non-reversing non-contact dc motor / 2103788
 Brushless motor with permanent magnets / 2100893
The invention relates to rotating electrical machines and can be used in brushless DC motors with permanent magnets on the rotor
 Electric motor / 2094932
The invention relates to the electrical industry, in particular for electric motors
 Dc electric machine / 2077106
 Dynamoelectric machine dc / 2075151
The invention relates to the field of electrical engineering and the performance of electrical machines DC with excitation from permanent magnets
 Electric motor / 2248657
Proposed motor has circular stator core with permanent magnets symmetrically disposed on its outer and inner surfaces over its circumference in alternating polarity and through core thickness in opposing polarity; it also has double-section rotor one of whose sections encloses stator and functions as external section while other section is disposed inside stator and functions as internal section. In addition motor has commutator-type current distributor and current collector both mounted for contacting commutator-type distributor segments and are connected to area of electromagnets of mentioned rotor sections.
 Advanced compact generator, the light emitting wheel with this generator, and method of its manufacture / 2237340
The invention relates to the field of electrical and concerns the implementation of a compact generator, a light-emitting wheel and method of manufacturing the generator
 Dc machine / 2187191
The invention relates to the field of electrical engineering, namely reversible and reversible machines DC permanent magnet
 Electric machine / 2096897
The invention relates to the field of electrical engineering, namely to electric machines
 Electrical machine stator / 2305889
Proposed electrical machine stator has core assembled of alternating radial nonmagnetic inserts, ferromagnetic cores, and yokes with windings, every two adjacent ones being differentially connected. Bores for bearing supports are coaxial with core bore. Core is built of U-shaped magnetic circuits whose teeth are facing outside and yokes that join teeth of U-shaped magnetic circuits with opposing teeth of adjacent U-shaped magnetic circuits. Each magnetic circuit has lengthwise disposed slots accommodating nonmagnetic strips to form longitudinal holes and alternating magnetic and nonmagnetic surfaces facing rotor stack assembled of toothed stampings. Butt-ends of nonmagnetic inserts are joined with supports to form electrical machine stator frame.
 Stator core supporting device / 2305358
Proposed device has pair of locking end plates 2 attached to both ends of stator core 1. Locking end plates 2 are positioned vertically and function to support stator core 1. Device also has at least one flexible supporting plate 3 disposed in parallel with center line in bottom position of stator core 1. Flexible supporting plate 3 joins pair of locking end plates 2 thereby supporting locking end plates 2. Device also has flexible supporting pockets 4 that function to hold at least one flexible supporting plate 3 at minimum two points, each being disposed between locking end plates 3. Device also has fixed pockets 6 which hold supporting pockets 4. Axial positions for coupling flexible supporting plates 3 with flexible supporting pockets 4 are adjustable ones.
 Homogeneous magnetic field inductor / 2305357
Proposed inductor has separate pre-magnetized and cut cylindrical permanent magnets mounted in nonmagnetic shell; pre-magnetized cylinders are cut over two longitudinal planes; angle between them depends on number of permanent-magnet segments in inductor and angle between plane of section and direction of cylindrical magnet saturation depends on location point of mentioned magnetic segment on inductor bore. In order to obtain homogeneous magnetic field within inductor direction of saturation of each permanent magnet in cross-sectional area of inductor should be found from formula αk = (4π/M)k, where k = 0, 1, 2, 3, 4 . ... N is sequence number of segment magnet over circular inductor bore.
 Permanent-magnet excited motor / 2299509
Proposed electric motor has stator and disk rotor. Stator has frame in the form of barrel, permanent-magnet alignment unit, as well as brush yoke with brush holders and brushes. Permanent-magnet alignment unit is usually made in the form of disk. Each permanent magnet is disposed in alignment unit seat assembled of two magnetically permeable plates mounted one on top of other and rigidly fixed together. First plate facing the rotor has through notches, each accommodating permanent magnet secured on second plate. Size of each notch in first plate corresponds to that of permanent magnet disposed therein. Brush yoke is made of insulating material and preferably mounted on second plate of alignment unit.
 Rail traction motor cooling device and electric motor equipped with such device / 2298868
Proposed device for cooling rail traction motor has centrifugal fan designed for rotating in one or two directions; it is disposed in air intake chamber and functions to force air into motor. Air stream forced by fan is bifurcated into inner flow conveyed into confined space accommodating at least motor rotor and external flow passed to air ducts for cooling motor stator. Motor frame has nozzle formed between its inner and outer parts which is separated by means of inner base part from confined space accommodating motor rotor and inner part of its stator.
 Electrical machine rotor / 2298274
Proposed rotor has alignment ring assembled of internal and external rings joined together; several rows of tangential slits are made in one of them so that jumpers between slits of one row are disposed opposite intermediate part of other-row slits. In this case, on one hand provision is made for making one of mentioned rings as flexible insert for alignment ring, for instance by producing it from spring steel; on other hand, rotor shroud rings of large electrical machines can be designed so that single-seat overhanging mechanical design of shroud-ring assembly is actually transformed into double-seat assembly by placing internal ring in the form of flexible insert into mentioned assembly, and vice versa.
 Method for manufacturing electrical machine magnetic core / 2296412
Proposed method for manufacturing miscellaneous magnetic cores for electrical machine phases includes winding of magnetic tape onto template, cutting of blanks obtained into separate parts followed by assembling inductor and armature from them by relatively disposing them so that direction of main flux crossing particular part and that of maximal magnetic permeability of this part coincide. In the course of assembly at least one of mentioned parts is turned through 60 to 120 deg. so as to deflect plane wherein magnetic tape forming this part is lying through -30 to +30 deg. from that of main-flux magnetic induction line.
|
FIELD: electro-mechanical engineering, in particular, constant current electric machines with constant magnets, possible use in electric motors and constant current generators. SUBSTANCE: in known stator of constant current electric machine with constant magnets, containing closed magneto-conductive yoke, polar constant magnets, mounted with alternating polarity on the stator axis, and polar tips, made of magneto-soft material and positioned on constant magnets on the side of air gap, in accordance to invention, symmetrically between neighboring poles (in inter-polar space) sectors made of non-magnetic materials are mounted, on sectors on the side of air gap, inter-polar flat constant magnets are positioned, having tangential magnetization, oriented with polarity of the same name to nearby polar tips and divided by nonmagnetic gap with polar magnets and polar tips, length-wise magnets are made within limits of stator poles along the axis of machine and oriented in parallel to polar magnets and tips. Inter-polar magnets are held on sectors with possible movement in radial direction. EFFECT: increased power due to increased working magnetic flow and increased stability of output characteristics due to possible adjustment thereof. 2 cl, 3 dwg
The invention relates to electrical engineering, in particular to electrical machines direct current with permanent magnets, and can be used in electric motors and generators DC. Known stator electric DC machine with permanent magnets [1], comprising a closed conductive yoke, flat permanent magnets adjacent the same polarity to the pole cores made with pole pieces, the number of which is equal to the number of stator poles, in which the yoke is made annular groove, symmetrical with respect to the plane perpendicular to the axis of the stator with pole cores with pole pieces, the cross section of the cores are made of the same shape as the cross section of the groove, but smaller, and permanent magnets, made in the form of a transverse groove disposed between adjacent pole cores, and the rest magnets made in the form of arcs and segments placed on the surfaces of the pole cores covering the yoke. Disadvantages are the complexity of the design due to the presence of a large number of elements of the magnetic system, the complexity of the configuration (structure in the form of arcs and segments) of permanent magnets, which increases the complexity of their manufacture. In addition to this is, in the known construction the magnets placed between adjacent pole cores, eliminate threads scattering pole core, but do not resolve the threads scattering pole tip, the effect of which significantly reduce the working magnetic flux and power the car. Also known stator electric DC machine with permanent magnets [2], comprising a cylindrical body of maletomale steel, which is used as a magnetic, pole, consisting of a flat prismatic permanent magnets and pole pieces made of magnetic material and placed on the permanent magnet by an air gap. This stator structure characterized by a small number of elements of the magnetic system, the easiest form of permanent magnets, as the closest to the technical essence and the achieved effect, taken as a prototype. A disadvantage of the known construction is the low value of the working magnetic flux due to the presence of significant flows scattering from the surfaces of pole pieces. In addition to electrical machines DC to ensure their interchangeability often impose requirements for securing a narrow variation range of the machine in normal mode. For example, weight is raised the requirement to ensure the speed of rotation of the output shaft at a fixed voltage power supply with an accuracy in the range of 5-10%. From theory of electrical machines DC is known that the speed of rotation of the output shaft can be determined by the formula [1, p.11-12]: Ω=U·2·π/z·f; where Ω - the speed of rotation of the output shaft; U - supply voltage; F is the magnetic flux in the air gap; z - total number of conductors anchor winding. It follows that at constant values of U and z rotation speed depends on changes in the magnitude of the magnetic flux F. When using rare earth magnets to provide high stability of their magnetic characteristics is technically very difficult, and practically they vary from sample to sample up to 20%. Thus, in the known construction of the electric machine when using rare earth magnets to provide a small range of change of the output speed at a fixed voltage power supply must be selected permanent magnets in the magnetic characteristics or to change (to find) the size of the air gap bore of the stator at the pole tips, which is very time-consuming. The aim of the invention is to increase the capacity by increasing the working magnetic flux and increase the stability of the output characteristics by the possibility of their control. This goal is achieved by Thu is known in the stator of an electric DC machine with permanent magnets, containing a closed conductive yoke, pole permanent magnets, set with alternating polarity along the axis of the stator and the pole pieces made of magnetic material and placed on the permanent magnet by an air gap, according to the invention symmetrically between adjacent poles (in the interpolar space) set sector of a nonmagnetic material, on the sectors of the air gap placed interpolar flat permanent magnets having a tangential magnetization oriented the same polarity to the nearby pole tips separated by nonmagnetic gap with the pole magnets and pole pieces, the length of the magnets is made within the poles of the stator along the axis of the machine and is oriented parallel to pole magnets and tips. While the interpolar magnets attached to the sectors with the ability to move in the radial direction. From the prototype of the proposed stator differs in that: in the interpolar space established sector of a nonmagnetic material; on the sector side of the air gap is placed flat permanent magnets; - the magnets are tangential magnetization is oriented the same polarity to the nearby pole tips and split magnanim gap with the pole magnets and pole pieces, - the length of the magnets is made within the poles of the stator along the axis of the machine and is oriented parallel to the pole tips; - magnets mounted for movement in a radial direction from the air gap. The analysis allows to draw a conclusion about the presence of novelty and essential features of the claimed design. The complexity of the known constructions of stators of electrical machines DC permanent magnet due to the fact that to increase the operating magnetic flux magnetic system consisting of a large number of items using permanent magnets complex design and high complexity software small variation of output parameters of the machine. In the inventive device technical result is achieved by using the maximum of the magnetic properties of materials. The use of the interpolar permanent magnets, oriented the same polarity to the nearby pole tips, by eliminating threads scattering from the surface of the pole tip and the pole of the magnet provides the maximum concentration of magnetic flux in the working gap and the increasing power of the electric machine. Moving the interpolar magnets in the radial direction from the air gap with the value of x is Yes, equal to or more than the height of the pole tip, by changing the amount of flux from the surface of the pole piece provides the ability to adjust the electric machine output parameters. 1 shows a stator of an electric DC machine with permanent magnets; figure 2 - chart of the magnetic field at maximum zoom, the interpolar magnets to the air gap; figure 3 - diagram of the magnetic field at the maximum destruction of the interpolar magnets from the air gap. The stator of the electric machine DC permanent magnet comprises a cylindrical housing made of magnetic material, which is closed conductive yoke 1. On the inner surface of the casing is installed with alternating polarity along the axis of the stator (machine) pole permanent magnets 2, their number equals the number of poles in an electric car. On pole permanent magnet by an air gap installed pole pieces 3 made of magnetic material. On the inner surface of the housing symmetrically between the poles are set sector 4, made of a nonmagnetic material. Flat permanent magnets 5, which is tangential magnetization installed on sectors 4 from vozdushnogo, oriented the same polarity to the nearby pole tips 3 and are structurally non-magnetic gap. Changing the position of the interpolar magnets can be implemented, for example, by use of the adjusting plate 6 mounted between the sectors and the inner surface of the housing when attaching sectors or adjusting plates 7 mounted in the slots of the sectors (manufacturing). Moving the interpolar magnets 5 on the air gap changes the value of the leakage flux from the surface of the pole piece and these changes result working magnetic flux in the air gap. The device operates as follows. Pole permanent magnet through the pole pieces, the magnetic anchor and the conductive body create the main magnetic flux, which is divided into two parts, the working magnetic flux in the gap, the value of which defines the output parameters of the machine, and the magnetic flux between the poles, which reduces the machine parameters. Figure 3 is a diagram of the magnetic field on the example of a four-pole electrical machine with besasavy anchor for the case of minimal effect interpolar magnets. Figure 3 is visible quite high density of magnetic field lines between the poles, which characterizes the values of the interpolar flux scattering. Figure 2 presents the diagram of the magnetic field for the case of maximum effect interpolar magnets. At maximum zoom, additional interpolar magnets to the working air gap due to the tangential magnetization and opposite orientation of their poles against the main is the curvature of magnetic field lines interpolar scattering and its concentration in the area of the working gap. The calculation of the electromagnetic torque, which for a given armature current describes the output parameters of the machine are executed by means of the finite element package Ansys simulation 9.0 in the planar problem. The calculation results show that using the maximum effect interpolar magnets, the torque value increases by 15...20%. The limit variable control of the output parameters of the machine by moving more magnets is 12...15%. The additional effect of applying the interpolar magnets is achieved in machines with so-called "besasavy" anchor [1, p.29-32], in which the air gap is increased in relation to machines with slot anchors. Increased air gap reduces the inductance of the armature and improving commutation, the allowable increase congestion and reduce losses in steel alternating magnetization. Further expansion of the gap without additional interpolar magnets above defined, enough of the small quantities, leads to an unacceptable increase flows scattering. The list of references 1. RF patent №2096889, CL. NC 23/04, 1997. 2. "DC motors with permanent magnets" / Tkani, Sagamore. M.: Energoatomizdat, 1989, p.11-12, 23-26, 29-32. 1. The stator of the electric machine DC permanent magnet containing a closed conductive yoke, pole permanent magnets, set with alternating polarity along the axis of the stator and the pole pieces made of magnetic material and placed on the permanent magnet by an air gap, wherein the symmetrically between adjacent poles (in the interpolar space) set sector of a nonmagnetic material, on the sectors of the air gap placed interpolar flat permanent magnets having a tangential magnetization oriented the same polarity to the nearby pole tips separated by nonmagnetic gap with the pole magnets and pole pieces, the length of the magnets performed within the poles of the stator along the axis of the machine and is oriented parallel to pole magnets and tips. 2. The stator according to claim 1, characterized in that the interpolar magnets attached to the sectors with the ability to move in radioinmybrain.
|
