• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A permanent magnet rotary dynamo electric machine wherein each permanent magnet pole (13) is equipped with a flux shunt (18) which provides a direct flux path between the airgap at the strong tip region of the pole and the iron circuit (12) upon which the pole is supported, the direct flux path shunting magnetic flux to the iron circuit when the current in the associated windings is low, but being saturated by flux flowing in the opposite direction at high values of winding current.
    公开号:SU1530105A3
    申请号:SU833673514
    申请日:1983-11-21
    公开日:1989-12-15
    发明作者:Годфри Уилсон Вест Джон
    申请人:Лукас Индастриз Паблик Лимитед Компани (Фирма)；
    IPC主号:
    专利说明:

    Feg.1
    cl
    with

    cm
    3
    rm. With a large current core, the increased magnetic induction at the strong edge of the pole is amplified by a shunt, which results in an increase in the rotating moment. With

    A small fiarpysKe shunt diverts a part of the magnetic flux directly to the PMO, which leads to an increase in the speed of the core. Given the options for the implementation of the shunt. 13 items ff, 22 ill.
    This invention relates to permanent magnet electric machines.
    The purpose of the invention is to improve the speed characteristics of the machine at low loads and increase the locking moment.
    FIG. 1 shows a machine with a general view; in fig. 2-22 - shunts and screens of the proposed machine, examples of execution.
    The machine contains a stator 1 with a cylindrical magnetic core of the 1st rod 2. On the pole 2, there are poles 3 of permanent magnets. The rotor 4 is mounted on the shaft 5. There is an air gap between the outer surface of the rotor 4 and the poles 3. A winding 6 is placed in the slots of the rotor 4. The poles 3 are made of a material with a relatively large coercive force and low residual magnetization, for example of ferrite. In shape, each pole is a cylinder segment. If taken in FIG. 1, by the arrow A, the direction of rotation of the rotor 4 (counterclockwise), the clockwise half of each pole 3 circumferentially can be viewed as an incident part, while the other part counterclockwise can be viewed as the escaping part. In the motor mode, when a current flows through the winding 6, a core reaction occurs and, under its influence, magnetic induction is concentrated at the incident edge of each pole, while at the incident edge of the pole magnetic induction decreases. FIG. 1, the clockwise end area of each pole is a strong edge, and counterclockwise, the weak edge. A magnetic shunt 7, made in the form of a 3-shaped piece, interacts with a strong edge of each pole 3. The shunts 7 are made of a material with a lot of usdushka; e- ni. Each shunt runs across
    axial length of the pole and contains the first part 8, recessed into the surface of the G1 pole1: l 3, and the second part 9, adjacent to the chamber 2. Parts 8 and 9 are connected by a radially directed part. At low currents, the core shunt 7 creates a path for passing a magnetic flux directly between the air gap and the frame. With a large core current, the increased magnetic induction at the suction edge of the pole is further enhanced by a shunt, as a result of which the torque increases. In the case of a small agglomerate, the shunt removes a part of the magnetic flux neprosrods-Tweuno to the PMO, which leads to a decrease in speed. Maintaining shunts 7 changes the engine's performance at standstill and under load. Usually, shu-i-7s are attached to the liner 2. The shunts 7 are used as a means for securing the polarizers 3 (Fig. 2). Each shunt 7 in connection with FIG. 2 forms a part of the clamp for being attached to the pole 2 of the adjacent poles 3. The shunt 7 is provided with a screen 10 on the side of the weak pole edge. It is necessary that the screen 10 of the weak edge does not form a shunt in order not to let the magnetic flux directly out of the air gap at the end of the weak edge of the pole 3 to the rom 2. Therefore, in the radial branch of the screen 10 there is a large hole 11, thanks to it inside between the rom 2 and the screen 10, there is a small amount of magnetically conducting material. The screens 10 are also preferably embedded into the surface of the pole 3. Each screen and each shunt can be individually made of mild steel and separately fastened with rivets to the 2. 2 rim. According to FIG. 3-5 shields 10 and shunts 7 form part of a ring of mild steel. The connection of the part 8 of the shunt 7 with the screen 10 of the same pole is accomplished with the help of shaped flanges 12, which are connected to the opposite axial edges of the pole 3. In FIG. 4 bye51
    An opening 13 through which the pole 3 protrudes. In FIG. 5 shows a preform section for forming a ring. Fitch 6 and 7 show ring design options. The flat steel strip is stamped to produce holes 13 and 14. As shown in FIG. The 8-10 structure is also ring-shaped, however, with the components obtained by pressing, the steel ring 15 forms such a structure. The material of the ring is relatively thin, so the pockets form protrusions 16 inside the ring. From FIG. 10 that the screen 10 is magnetically separated from the remaining 11 part of the ring 15 by the holes 11, there is only a connection} the first material. FIG. 12 shows an embodiment of the ring 15. A strip 17 of steel, the length of which is equal to the inner circumference of the frame 2, is punched in the places corresponding to the polarity of the poles, thus forming holes 18, as well as shields 19 and 20, which are bent from the strip to form a shunt and screen. In the flap 19 forming the shield 10, holes 21 are made to remove metal shunting the magnetic flux. In the construction of FIG. 13 and 14 and the shunts and screens are made of steel strip. The shunts and shields are held relative to each other by means of two rings. 7.7. from non-magnetic material. FIG. 15-18 presents options for obtaining a wide arc of coverage while maintaining the advantages of a small arc: Referring to FIG. 15 arc length of each pole 3 is reduced by about 20%. To the shunt there is additionally attached a pole tip of a L-shaped form with parts 23 and 2.4, fastened with the radial part of the shunt, part 25 of the tip is directed (it is coplanar with part 8 of the shunt and in the opposite direction. From figure 16 it is clear that parts 8 and 9 and the radial part of the shunt pass along the entire length of the pole with which they interact. The tip part 23 is shorter and equal in axial length to the rotor core of the machine 4. According to Fig. 18, the pole tip is S-shaped and contains part 26 that is in engagement with part 9 of the shunt. The tip tip 27 is parallel and at a distance from the radial portion of the shunt. There is also a tip portion 28, directed
    five
    01056
    There is an air gap 29 between the shunt part 8 and the tip part 28. There is an air gap 29 in Fig. 19-22 with a hole that is directed from the surface, facing the air gap, to the chamber 2. The opening 30 is made in the form of axialts Q but elongated; spruce. The radial part 31 of the shunt has a T-shaped cross-section, and part 32 is a leg T, and transverse along entire axial length
    with pole 3 and recessed into its surface. From FIG. 19 that part 33 does not reach the edge of pole 3. In FIG. 21 and 22 depict a modification of the construction of FIG. 19 and 20, in which the radial portion 32, passing through pole 3, is not used. In this case, the shunt has the form of a radially directed strip 34, in which there is a central portion 35.
    The 25 ends of the strip are radially directed portions 36, a passage 1 p1e along the axial end surfaces of the poles and bent at the ends of the bushing to form portions 37,
    2Q engaging with the inner surface of the chassis 2.
    The use of a magnetic shunt at a strong edge can be used in direct current generators. The use of shunts is also possible in alternators, while the shunt provides additional excitation with increasing current, so as with low currents a decrease in magnetic flux and a reduction in steel loss occur. The use of a shunt also provides an intrinsic effect for a permanent pole magnet and reduces demagnetization of the pole from the current of the core.
    35
    40
    45
    权利要求:
    Claims (14)
    [1]
    1. An electric machine with permanent magnets, containing an excitation system, made in the form of poles of permanent magnets mounted on a magnetic conductor frame, measles with a winding and magnetic shunts, in order to improve the speed characteristics of the machine at low loads and an increase in the stopping torque, the shunts are made of a material with high saturation induction and
    placed on the oncoming side of each pole, with one part of the shunt adjacent to the pole, the second part - to the side of the pole, and a third to the surface of the pole facing the gap of the machine
    [2]
    2. The machine according to claim 1, characterized in that the magnetic shunts are mounted on the frame.
    [3]
    3. The machine according to claim 2, characterized in that the magnetic shunts are provided with an attachment means to the rim.
    [4]
    4.Mashi on PP. 1-3, that is, each pole from the side of the escapement is provided with a screen, introduced into it in the form of a shunt with openings in it,
    [5]
    5. Machine on PP. 1-3, that is, that the shunts are connected by means of a unit and form a single annular element of a material with a large amount of induction;
    [6]
    6.Mash.n-a on p. 1-3, about the fact that each shunt is connected to the screen and together they form a single ring element, the number of shunts being equal to the number of shields.
    [7]
    7. Machine according to paragraphs. 1-6, characterized in that on the surface of the pole, facing the gap of the machine, there are holes, in which a part of the shunt is placed, and the depth of the notches is equal to the width of the shunt part to be installed.
    [8]
    8. Machine on PP. 1-7, the length of which is
    five
    0
    five
    0
    five
    The surface of the gtolus .a, facing the basin of which the shunt is installed, is not more than 50% and not less than 10% of the length of the surface of the entire pole.
    [9]
    9.Mashina on PP. 1-7, characterized in that the length of the pole surface facing the gap on which the shunt is mounted is not more than 40% and not less than 20% of the surface length of the entire pole.
    [10]
    10.Mashina on PP. 1-3, each of the shunt is provided with a pole piece, one part of which is adjacent to the middle part of the shunt, and the other part to the gap and facing in the direction opposite to the pole to which the shunt adjoins.
    [11]
    11. The machine according to claim 10, about tl and - that the part of the tip facing the gap, is made flush with the part of the shunt, adjacent to the gap.
    [12]
    12. The machine according to claim 10, characterized in that the tip is installed with a gap relative to the shunt located at the pole.
    [13]
    13. The machine on the PP. 1-3, characterized in that the shunt is suspended along the entire axial pole length.
    [14]
    14. The machine according to claim 12, characterized in that the tip is made 5-shaped, and its portion facing the shunt is located relative to the punta with a gap.
    (
    W
    Тё7
    Fig.Z
    Fy
    FI.5
    FIG.
    FIG. ten
    9
    FIG. eleven
    P
    ten
    21
    FIG. eleven
    22
    13.
    Fig.P
    fie. YU
    Editor A. Ogar
    Compiled by C, Shutova Tehred L. Serdyukova
    thirty
    FIG. 20
    FIE 21
    36
    FIG. 21
    Proofreader M. Pojo
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    同族专利:
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    AU2149683A|1984-05-31|
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    引用文献:
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    US3083310A|1960-03-11|1963-03-26|Controls Co Of America|Electric motor having a permanent magnet stator|
    DE1788066A1|1968-09-26|1972-01-13|Siemens Ag|Device for temperature compensation in electrical machines with permanent magnet excitation|
    US3772546A|1972-02-28|1973-11-13|Applied Motors Inc|Dynamoelectric machine with ceramic permanent magnets|
    JPS5775555A|1980-10-24|1982-05-12|Fanuc Ltd|Dc motor|
    JPS57153558A|1981-03-17|1982-09-22|Hitachi Ltd|Permanent magnet field starter with auxiliary pole|
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    JPS592554A|1982-06-28|1984-01-09|Hitachi Ltd|Permanent magnet field motor|FR2557743B1|1984-01-04|1988-07-08|Marchal Equip Auto|ROTATING ELECTRIC MACHINE WITH PERMANENT MAGNETS, ELEMENT AND PERMANENT MAGNET FOR SUCH A MACHINE|
    JPH0695824B2|1985-01-14|1994-11-24|株式会社日立製作所|Magnet type DC machine stator|
    DE3539851A1|1985-11-09|1987-05-14|Bosch Gmbh Robert|ELECTRICAL MACHINE, IN PARTICULAR FOR TURNING DEVICES OF INTERNAL COMBUSTION ENGINES|
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    FR2625852B1|1988-01-11|1991-01-18|Equip Electr Moteur|STATOR OF ROTATING MACHINE WITH INDUCING POLES AND METHOD FOR OBTAINING SAME|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    GB8233268|1982-11-22|
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