CN202076915U - Rotor of excitation direct-current (DC) brushless motor - Google Patents
Rotor of excitation direct-current (DC) brushless motor Download PDFInfo
- Publication number
- CN202076915U CN202076915U CN2011201640914U CN201120164091U CN202076915U CN 202076915 U CN202076915 U CN 202076915U CN 2011201640914 U CN2011201640914 U CN 2011201640914U CN 201120164091 U CN201120164091 U CN 201120164091U CN 202076915 U CN202076915 U CN 202076915U
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- China
- Prior art keywords
- iron core
- magnetic material
- permanent magnetic
- rotor
- circumference
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- Expired - Fee Related
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- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Brushless Motors (AREA)
Abstract
The utility model discloses a rotor of an excitation direct-current (DC) brushless motor. The rotor comprises an iron core fixed on a motor shaft, wherein the iron core is a cylindrical iron core formed by overlapping disc-shaped silicon-steel sheets together along the axial direction, at least two axial permanent magnetic material strips are uniformly distributed and inlaid along the circumference of the iron core, polar axes of the permanent magnetic material strips are in the radial direction of the iron core, axial coil inserting slots are arranged at two sides of the permanent magnetic material strips on the circumference of the iron core, excitation coils of the permanent magnetic material strips are wound in the coil inserting slots, axes of the excitation coils are in the radial direction of the iron core, two ends of lead wires of the excitation coils are connected with diodes, and the direction of magnetic lines of force of a magnetic field produced by current flowing through the diodes in a forward direction in the excitation coils is the same as the direction of the magnetic lines of force of the permanent magnetic material strips in the excitation coils. In the utility model, the permanent magnetic material strips on the circumference of the iron core are provided with the excitation coils, and when the rotor is rotated, the magnetic field producing induced current in the excitation coils is overlapped with the magnetic field of the permanent magnetic material strips, so as to enhance the magnetic field intensity of the permanent magnetic material strips.
Description
Technical field
The utility model relates to the rotor of a kind of DC Brushless Motor, particularly a kind of DC Brushless Motor.
Background technology
In the prior art, DC Brushless Motor has casing, there is bearing at the casing two ends, motor reel is arranged between bearing, stator and stator winding are arranged in the casing, rotor is arranged on the motor reel, rotor is cored, iron core is the cylinder-shaped iron core that stacks vertically with the disc silicon steel sheet, and on the circumference of iron core, be uniformly distributed with the axial permanent magnetic material strips of even number along the circumference, the pole axis of permanent magnetic material bar is at iron core radially.Has only the permanent magnetic material bar on the rotor core of this DC Brushless Motor, DC Brushless Motor in use, the temperature of permanent magnetic material bar can raise, permanent magnetic material temperature its magnetic force that raises can weaken, the magnetic force of permanent magnetic material bar weakens the magnetic force that can cause rotor and descends, the decreased performance that causes DC Brushless Motor, the power and the efficient of reduction DC Brushless Motor, waste electric energy.
The utility model content
The purpose of this utility model is in order to overcome above-mentioned deficiency, propose in use a kind of, the rotor of the excitation main flow brushless motor that the magnetic force of rotor can not descend.
The utility model is the rotor of a kind of excitation DC brushless motor of realizing with the following method, described rotor comprises the iron core that is fixed on the motor reel, described iron core is the cylinder-shaped iron core that stacks vertically with the disc silicon steel sheet, on the circumference of described iron core, be uniformly distributed along the circumference and be inlaid with at least two axial permanent magnetic material strips, the pole axis of described permanent magnetic material bar be iron core radially, it is characterized in that, on the circumference of described iron core, the both sides of permanent magnetic material bar are provided with axially wire casing down, in described wire casing down, be wound with the magnet exciting coil of permanent magnetic material bar, the axis of described magnet exciting coil at iron core radially, two ends at described magnet exciting coil lead are connected with diode, and positive flow is identical with the magnetic line of force direction of permanent magnetic material bar in the magnet exciting coil in the magnetic line of force direction that magnet exciting coil produces magnetic field through the electric current of diode.
On the circumference of described iron core, the bar number of the axial permanent magnetic material strips of inlaying of being uniformly distributed along the circumference is 2 integral multiple.
Side at described motor reel is provided with the heat radiation flabellum.
Of the present utility model a bit and beneficial effect be, because on the iron core circumference, the both sides of permanent magnetic material bar are provided with axially wire casing down, be wound with the magnet exciting coil of permanent magnetic material bar in the axial wire casing down of permanent magnetic material bar both sides, the axis of magnet exciting coil at iron core radially, the two ends of magnet exciting coil lead are connected with diode, and positive flow is identical with the magnetic line of force direction of permanent magnetic material bar in the magnet exciting coil in the magnetic line of force direction that magnet exciting coil produces magnetic field through the electric current of diode.During rotor rotation, can produce induced current in the magnet exciting coil of permanent magnetic material bar, induced current becomes DC induction stream through diode rectification, and DC induction stream can strengthen the magnetic field intensity of permanent magnetic material bar in the magnetic field of magnet exciting coil generation and the magnetic field superposition of permanent magnetic material bar.When permanent magnetic material bar Yin Wendu raises and magnetic force when weakening, induced current magnetic field can compensate the decline of the magnetic field intensity of permanent magnetic material bar, guarantees that the magnetic force of rotor can not descend, and guarantees that the power and the efficient of DC Brushless Motor does not reduce.Axle head at motor is equipped with the flabellum that is used to dispel the heat in addition, also can play and reduce permanent magnetic material bar temperature, thereby reach the purpose that guarantees magnetic field intensity.
Description of drawings
Fig. 1 is the rotor schematic perspective view of the utility model excitation DC brushless motor;
Fig. 2 is the A-A generalized section of Fig. 1.
Among the figure: 1, rotor; 2, motor reel; 3, iron core; 4, permanent magnetic material bar; 5, following wire casing; 6, magnet exciting coil; 7, diode; 8, heat radiation flabellum.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is further described.Following examples only are used for the technical solution of the utility model more clearly is described, and can not limit protection range of the present utility model with this.
As Fig. 1, shown in 2, the utility model is a kind of rotor of excitation DC brushless motor, described rotor 1 comprises the iron core 3 that is fixed on the motor reel 2, described iron core 3 is the cylinder-shaped iron cores that stack vertically with the disc silicon steel sheet, on the circumference of described iron core 3, be uniformly distributed along the circumference and be inlaid with at least two axial permanent magnetic material strips 4, the pole axis of described permanent magnetic material bar 4 be iron core 3 radially, on the circumference of described iron core 3, the both sides of permanent magnetic material bar 4 are provided with axially wire casing 5 down, in described wire casing 5 down, be wound with the magnet exciting coil 6 of permanent magnetic material bar, the axis of described magnet exciting coil 6 at iron core 3 radially, two ends at described magnet exciting coil 6 leads are connected with diode 7, and positive flow is identical with the magnetic line of force direction of permanent magnetic material bar in the magnet exciting coil 6 in the magnetic line of force direction that magnet exciting coil 6 produces magnetic field through the electric current of diode 7.
In the utility model, on the circumference of described iron core 4, the bar number of the axial permanent magnetic material strips 4 of inlaying of being uniformly distributed along the circumference is 2 integral multiple, as 2, or 4, or 8, or 16.Side at described motor reel 2 is provided with heat radiation flabellum 8.
The above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (3)
1. the rotor of an excitation DC brushless motor, described rotor comprises the iron core that is fixed on the motor reel, described iron core is the cylinder-shaped iron core that stacks vertically with the disc silicon steel sheet, on the circumference of described iron core, be uniformly distributed along the circumference and be inlaid with at least two axial permanent magnetic material strips, the pole axis of described permanent magnetic material bar be iron core radially, it is characterized in that, on the circumference of described iron core, the both sides of permanent magnetic material bar are provided with axially wire casing down, in described wire casing down, be wound with the magnet exciting coil of permanent magnetic material bar, the axis of described magnet exciting coil at iron core radially, two ends at described magnet exciting coil lead are connected with diode, and positive flow is identical with the magnetic line of force direction of permanent magnetic material bar in the magnet exciting coil in the magnetic line of force direction that magnet exciting coil produces magnetic field through the electric current of diode.
2. by the rotor of the described excitation DC brushless motor of claim 1, it is characterized in that, on the circumference of described iron core, the bar number of the axial permanent magnetic material strips of inlaying of being uniformly distributed along the circumference is 2 integral multiple.
3. by the rotor of the described excitation DC brushless motor of claim 1, it is characterized in that, be provided with the heat radiation flabellum in a side of described motor reel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201640914U CN202076915U (en) | 2011-05-23 | 2011-05-23 | Rotor of excitation direct-current (DC) brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201640914U CN202076915U (en) | 2011-05-23 | 2011-05-23 | Rotor of excitation direct-current (DC) brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202076915U true CN202076915U (en) | 2011-12-14 |
Family
ID=45114992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201640914U Expired - Fee Related CN202076915U (en) | 2011-05-23 | 2011-05-23 | Rotor of excitation direct-current (DC) brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202076915U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801271A (en) * | 2011-05-23 | 2012-11-28 | 无锡顶一电机有限公司 | Rotor for excitation direct-current brushless motor |
| CN106438252A (en) * | 2016-11-29 | 2017-02-22 | 哈尔滨工业大学 | Cusp field plasma thruster controllable in thrust direction |
-
2011
- 2011-05-23 CN CN2011201640914U patent/CN202076915U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801271A (en) * | 2011-05-23 | 2012-11-28 | 无锡顶一电机有限公司 | Rotor for excitation direct-current brushless motor |
| CN106438252A (en) * | 2016-11-29 | 2017-02-22 | 哈尔滨工业大学 | Cusp field plasma thruster controllable in thrust direction |
| CN106438252B (en) * | 2016-11-29 | 2018-09-07 | 哈尔滨工业大学 | The controllable cusp field plasma thruster of thrust direction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111214 Termination date: 20170523 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |