CN210111816U - Novel permanent magnet excitation type generator with variable air gap magnetic flux density - Google Patents
Novel permanent magnet excitation type generator with variable air gap magnetic flux density Download PDFInfo
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- CN210111816U CN210111816U CN201920686150.0U CN201920686150U CN210111816U CN 210111816 U CN210111816 U CN 210111816U CN 201920686150 U CN201920686150 U CN 201920686150U CN 210111816 U CN210111816 U CN 210111816U
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Abstract
A novel permanent magnet excitation type generator with variable air gap flux density comprises an axle center, wherein a first outer ring iron core, an inner ring iron core and a second outer ring iron core are sequentially sleeved on the axle center from inside to outside; the first outer ring iron core, the inner ring iron core and the second outer ring iron core are silicon steel sheet iron cores; the first outer ring iron core, the inner ring iron core and the second outer ring iron core are respectively provided with a first coil winding, a second coil winding and a third coil winding; a three-phase rectifier is arranged on the lower side of the first outer ring iron core; the inner side of the first outer ring iron core is provided with a magnet group which is an annular structure formed by a plurality of sector-shaped magnet pieces; a shell is arranged outside the second outer ring iron core and sleeved on the shaft center; a bearing is arranged between the shell and the axle center. The utility model combines the excitation motor and the permanent magnet motor, so that the power consumption is low, the permanent magnet material consumption is small, and the cost is reduced; and the rotor coil can produce different air gap flux density along with the rotational speed change, makes the utility model discloses easily start when low rotational speed, output is high when high rotational speed.
Description
Technical Field
The utility model relates to an electrical equipment technical field, concretely relates to novel permanent magnetism excitation type generator of variable air gap magnetic flux density.
Background
The existing magnetic generator is generally classified into an excitation type and a permanent magnet type. In a conventional excitation type synchronous generator, a rotor of the generator has an electric brush, a slip ring, an excitation coil and an external direct current power supply, and the excitation coil generates an excitation magnetic field. The stator has three-phase coil windings and generates an armature magnetic field. The excitation type synchronous generator is characterized in that a prime motor drives a rotor, and the excitation magnetic field of the rotor induces a three-phase coil winding of a stator to generate a three-phase alternating current power supply. However, when the excitation type synchronous generator works, the brush and the slip ring thereof often cause loss of an external direct current power supply due to poor efficiency, and the assembly is labor-consuming and the use and production costs are high.
The use of permanent magnets to provide an excitation field for the rotor of an alternator is known as a permanent magnet generator. When the prime mover drives the rotor to rotate, a rotating magnetic field is generated and moves relative to the stator three-phase coil winding, so that alternating current induced electromotive force is generated, the output voltage changes along with the rotating speed due to the fixed size of the magnetic field, and the frequency also changes due to different rotating speeds, so that the frequency cannot be fixed. However, the cogging torque of the permanent magnet generator is large, and the cost of the permanent magnet material is high.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the utility model provides a novel permanent magnet excitation type generator with variable air gap magnetic flux density, which has low power consumption, small permanent magnet material consumption and low cost; and the cogging torque is small, the starting is easy at low rotating speed, and the output power is high at high rotating speed.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a novel permanent magnet excitation type generator with variable air gap flux density is characterized by comprising an axis, wherein a first outer ring iron core, an inner ring iron core and a second outer ring iron core are sequentially sleeved on the axis from inside to outside;
the first outer ring iron core, the inner ring iron core and the second outer ring iron core are silicon steel sheet iron cores;
the first outer ring iron core, the inner ring iron core and the second outer ring iron core are respectively provided with a first coil winding, a second coil winding and a third coil winding;
the lower sides of the first outer ring iron core and the inner ring iron core are provided with three-phase rectifiers;
a magnet group is arranged on the inner side of the first outer ring iron core and is of an annular structure consisting of a plurality of sector-shaped magnet pieces;
a shell is arranged outside the second outer ring iron core and sleeved on the shaft center; and a bearing is arranged between the shell and the axle center.
Further, the first outer ring iron core, the inner ring iron core and the second outer ring iron core are sleeved in the middle of the axis.
Further, still contain fixed lid, fixed lid is located first outer ring iron core with the upside of inner ring iron core.
Furthermore, the number of the bearings is two, and the two bearings are respectively arranged on the upper side and the lower side of the shell.
Further, a bearing cover is arranged outside the bearing and connected with the shell.
Further, the inner diameter of the middle part of the shell is larger than the inner diameters of the two ends of the shell, and the length of the middle part of the shell is the same as the thickness of the second outer ring iron core.
Further, the shell contains upper housing and lower casing, upper housing with lower casing corresponds the setting.
Further, the center of the inner side of the lower shell is provided with a hollow cylindrical protrusion, and the outer side of the cylindrical protrusion is uniformly provided with a plurality of grooves.
Further, the size of recess with the size of magnet piece is the same, the number of recess with the number of magnet piece is the same, the magnet piece is located in the recess.
Compared with the prior art, the utility model has the beneficial technical effects that: the novel permanent magnet excitation type generator with variable air gap flux density combines the excitation motor and the permanent magnet motor, reduces the electric quantity loss of the brush and the slip ring caused by poor efficiency, has small permanent magnet material consumption, and greatly reduces the production and use cost; and the rotor coil can generate different air gap magnetic flux densities along with the change of the rotating speed, so that the synchronous generator is easy to start at a low rotating speed and has high output power at a high rotating speed.
Drawings
Fig. 1 is an exploded schematic view a of an embodiment of the present invention;
fig. 2 is an exploded view b of an embodiment of the present invention;
fig. 3 is a schematic longitudinal sectional view of an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of an embodiment of the present invention;
fig. 5 is a schematic perspective view of an embodiment of the present invention.
In the figure: 1-bearing cover, 2-bearing, 3-upper shell, 4-axle center, 5-inner ring iron core, 6-second coil winding, 7-first outer ring iron core, 8-first coil winding, 9-three-phase rectifier, 10-second outer ring iron core, 11-third coil winding, 12-lower shell, 13-magnet piece, 14-fixed cover, 15-cylindrical protrusion.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings.
As shown in fig. 1-5, a novel permanent magnet excitation type generator with variable air gap flux density comprises an axle center 4, wherein a first outer ring iron core 7, an inner ring iron core 5 and a second outer ring iron core 10 are sequentially sleeved on the axle center 4 from inside to outside;
the first outer ring iron core 7, the inner ring iron core 5 and the second outer ring iron core 10 are silicon steel sheet iron cores;
the first outer ring iron core 7, the inner ring iron core 5 and the second outer ring iron core 10 are respectively provided with a first coil winding 8, a second coil winding 6 and a third coil winding 11;
a three-phase rectifier 9 is arranged at the lower sides of the first outer ring iron core 7 and the inner ring iron core 5; the three-phase rectifier 9 rectifies a three-phase alternating current power supply generated by the auxiliary generator into a direct current power supply which is directly input to an excitation winding of a rotor of the main generator;
a magnet group is arranged on the inner side of the first outer ring iron core 7, and the magnet group is of an annular structure consisting of a plurality of sector-shaped magnet pieces 13;
a shell is arranged outside the second outer ring iron core 10 and sleeved on the shaft center 4; a bearing 2 is arranged between the shell and the axle center 4;
the first outer ring iron core 7, the first coil winding 8, the inner ring iron core 5, the second coil winding 6, the axle center 4, the fixed cover 14 and the three-phase rectifier 9 jointly form a rotor part of the synchronous generator;
the second outer ring core 10, the third coil winding 11 and the magnet group together constitute a stator portion of the synchronous generator.
In one embodiment of the present invention, the first outer ring core 7, the inner ring core 5 and the second outer ring core 10 are sleeved on the middle portion of the shaft center 4.
Preferably, a fixed cover 14 is further included, and the fixed cover 14 is arranged on the upper sides of the first outer ring iron core 7 and the inner ring iron core 5; the fixing cover 14 is used to fix the first outer ring core 7 and the inner ring core 5.
Optionally, two bearings 2 are provided, and the two bearings 2 are respectively provided at the upper and lower sides of the housing.
In another embodiment of the present invention, a bearing cap 1 is disposed outside the bearing 2, and the bearing cap 1 is connected to the housing; one bearing cap 1 is provided for each bearing 2, and the bearing caps 1 protect the bearings 2.
Preferably, the inner diameter of the middle part of the shell is larger than the inner diameters of the two ends of the shell, and the length of the middle part of the shell is the same as the thickness of the second outer ring iron core 10; therefore, the second outer ring iron core 10 is just placed in the middle of the shell, and the second outer ring iron core is prevented from shifting or shaking in the shell in the rotating process, so that the working and service life of the engine are influenced.
In some embodiments of the present invention, the housing includes an upper housing 3 and a lower housing 12, the upper housing 3 and the lower housing 12 are disposed correspondingly, and a rotor portion and a stator portion of the synchronous generator are both located in a cavity defined by the upper housing 3 and the lower housing 12, which is convenient for installation.
Optionally, a hollow cylindrical protrusion 15 is disposed at the center of the inner side of the lower shell 12, and a plurality of grooves are uniformly disposed on the outer side of the cylindrical protrusion 15.
In other embodiments of the utility model, the size of recess is the same with magnet piece 13's size, and the number of recess is the same with magnet piece 13's number, and the recess is used for fixed magnet piece 13, prevents that it from taking place to remove, guarantees this synchronous generator normal operating.
The first outer ring iron core 7, the first coil winding 8, the magnet piece 13 and the cylindrical protrusion 15 jointly form a small permanent magnet generator in the synchronous generator; the inner ring iron core 5 and the second coil winding 6 jointly form a magnetic pole of the excitation type generator of the synchronous generator.
The synchronous generator is provided with three-phase alternating current power by a small permanent magnet generator inside, and the three-phase alternating current power is transmitted to the magnetic poles of an excitation generator through a three-phase rectifier 9 fixed on a rotor to provide excitation power of the magnetic poles of the rotor of the excitation generator. The second coil winding 6 can generate different air gap magnetic flux densities along with the change of the rotating speed, and when the rotating speed of the second coil winding 6 is low, the air gap magnetic flux density is low and the cogging torque is low, so that the generator is easier to start; when the rotating speed of the second coil winding 6 is higher, the excitation is stronger, the air gap magnetic flux density is higher, and high rated output power is achieved.
The novel permanent magnet excitation type generator with variable air gap magnetic flux density combines the excitation motor and the permanent magnet motor, avoids the electric quantity loss caused by poor efficiency of the electric brush and the slip ring, has small permanent magnet material consumption, and greatly reduces the production and use cost; and the rotor coil can generate different air gap magnetic flux densities along with the change of the rotating speed, so that the synchronous generator is easy to start at a low rotating speed and has high output power at a high rotating speed.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A novel permanent magnet excitation type generator with variable air gap flux density is characterized by comprising an axis, wherein a first outer ring iron core, an inner ring iron core and a second outer ring iron core are sequentially sleeved on the axis from inside to outside;
the first outer ring iron core, the inner ring iron core and the second outer ring iron core are silicon steel sheet iron cores;
the first outer ring iron core, the inner ring iron core and the second outer ring iron core are respectively provided with a first coil winding, a second coil winding and a third coil winding;
the lower sides of the first outer ring iron core and the inner ring iron core are provided with three-phase rectifiers;
a magnet group is arranged on the inner side of the first outer ring iron core and is of an annular structure consisting of a plurality of sector-shaped magnet pieces;
a shell is arranged outside the second outer ring iron core and sleeved on the shaft center; and a bearing is arranged between the shell and the axle center.
2. The novel permanent magnet excitation type generator with variable air gap flux density as claimed in claim 1, wherein the first outer ring iron core, the inner ring iron core and the second outer ring iron core are sleeved in the middle of the shaft core.
3. The new variable air gap flux density permanent magnet excited generator of claim 1, further comprising a fixing cover disposed on the upper side of the first outer ring core and the inner ring core.
4. The novel permanent magnet excitation type generator with variable air gap flux density as claimed in claim 1, wherein there are two bearings, and the two bearings are respectively disposed at the upper and lower sides of the housing.
5. The variable air gap flux density novel permanent magnet excitation type generator according to claim 1, wherein a bearing cover is arranged outside the bearing, and the bearing cover is connected with the housing.
6. The novel permanent magnet excitation type generator with variable air gap flux density as claimed in claim 1, wherein the inner diameter of the middle part of the housing is larger than the inner diameters of the two ends of the housing, and the length of the middle part of the housing is the same as the thickness of the second outer ring iron core.
7. The novel permanent magnet excited generator with variable air gap flux density according to claim 1, wherein the housing comprises an upper shell and a lower shell, and the upper shell is arranged corresponding to the lower shell.
8. The novel permanent magnet excitation type generator with variable air gap flux density as claimed in claim 7, wherein the lower shell is provided with a hollow cylindrical protrusion at the center of the inner side, and a plurality of grooves are uniformly formed on the outer side of the cylindrical protrusion.
9. The variable air gap flux density PMSM of claim 8, wherein the grooves are the same size as the magnet pieces, the number of grooves is the same as the number of magnet pieces, and the magnet pieces are disposed in the grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920686150.0U CN210111816U (en) | 2019-05-14 | 2019-05-14 | Novel permanent magnet excitation type generator with variable air gap magnetic flux density |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920686150.0U CN210111816U (en) | 2019-05-14 | 2019-05-14 | Novel permanent magnet excitation type generator with variable air gap magnetic flux density |
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| CN210111816U true CN210111816U (en) | 2020-02-21 |
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| CN201920686150.0U Active CN210111816U (en) | 2019-05-14 | 2019-05-14 | Novel permanent magnet excitation type generator with variable air gap magnetic flux density |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048572A (en) * | 2019-05-14 | 2019-07-23 | 苏州圆格电子有限公司 | A kind of novel permanent magnetic excitation generator of variable-air-gap magnetic flux density |
| CN114123697A (en) * | 2021-11-04 | 2022-03-01 | 新亚东方电能科技有限公司 | New forms of energy generator rotor dual drive device |
-
2019
- 2019-05-14 CN CN201920686150.0U patent/CN210111816U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048572A (en) * | 2019-05-14 | 2019-07-23 | 苏州圆格电子有限公司 | A kind of novel permanent magnetic excitation generator of variable-air-gap magnetic flux density |
| CN114123697A (en) * | 2021-11-04 | 2022-03-01 | 新亚东方电能科技有限公司 | New forms of energy generator rotor dual drive device |
| CN114123697B (en) * | 2021-11-04 | 2022-08-26 | 新亚东方电能科技有限公司 | New forms of energy generator rotor dual drive device |
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Assignee: Yisheng Global Co.,Ltd. Assignor: SUZHOU YUANGE ELECTRONIC Co.,Ltd. Contract record no.: X2023990000746 Denomination of utility model: A Novel Permanent Magnet Excitation Generator with Variable Air Gap Flux Density Granted publication date: 20200221 License type: Common License Record date: 20230810 |