CN102801271A - Rotor for excitation direct-current brushless motor - Google Patents
Rotor for excitation direct-current brushless motor Download PDFInfo
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- CN102801271A CN102801271A CN2011101325295A CN201110132529A CN102801271A CN 102801271 A CN102801271 A CN 102801271A CN 2011101325295 A CN2011101325295 A CN 2011101325295A CN 201110132529 A CN201110132529 A CN 201110132529A CN 102801271 A CN102801271 A CN 102801271A
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- iron core
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- magnetic material
- material strips
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a rotor for an excitation direct-current brushless motor. The rotor comprises an iron core which is fixed on a shaft of the motor, wherein the iron core is a cylindrical iron core which is formed by overlapping disc-shaped silicon steel sheets axially; at least two axial permanent magnet material strips are uniformly embedded along the circumference of the iron core; the polar axes of the permanent magnet material strips are in the radial direction of the iron core; axial wiring grooves are formed on the two sides of the permanent magnet material strips on the circumference of the iron core; excitation coils of the permanent magnet material strips are wound in the wiring grooves; the axes of the excitation coils are in the radial direction of the iron core; diodes are connected with the two ends of each lead wire of the excitation coils; and the direction of magnetic force lines of a magnetic field generated in the excitation coils by the current which flows through the diodes in the positive direction is the same as that of the magnetic force lines of the permanent magnet material strips in the excitation coils. The permanent magnet material strips are provided with the excitation coils on the circumference of the iron core of the rotor; and when the rotor is rotated, the magnetic fields which generate the current in the excitation coils is overlapped with the magnetic fields of the permanent magnet material strips, and the magnetic field intensity of the permanent magnet material strips can be enhanced.
Description
Technical field
The present invention 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, and 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.
Summary of the invention
The objective of the invention 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 present invention is the rotor with a kind of excitation DC brushless motor of following method realization; Said rotor comprises the iron core that is fixed on the motor reel; Said iron core is the cylinder-shaped iron core that stacks vertically with the disc silicon steel sheet, on the circumference of said iron core, being uniformly distributed along the circumference is inlaid with at least two axial permanent magnetic material strips, the pole axis of said permanent magnetic material bar be iron core radially; It is characterized in that; On the circumference of said iron core, the both sides of permanent magnetic material bar are provided with axially wire casing down, in said wire casing down, are wound with the magnet exciting coil of permanent magnetic material bar, the axis of said magnet exciting coil is at iron core radially; Two ends at said 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 said motor reel is provided with the heat radiation flabellum.
Of the present invention 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, 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 excitation DC brushless motor of the present invention;
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 accompanying drawing and embodiment, specific embodiments of the invention further describes.Following examples only are used for technical scheme of the present invention more clearly is described, and can not limit protection scope of the present invention with this.
Like Fig. 1, shown in 2; The present invention is a kind of rotor of excitation DC brushless motor; Said rotor 1 comprises the iron core 3 that is fixed on the motor reel 2, and said iron core 3 is the cylinder-shaped iron cores that stack vertically with the disc silicon steel sheet, on the circumference of said iron core 3, being uniformly distributed along the circumference is inlaid with at least two axial permanent magnetic material strips 4; The pole axis of said permanent magnetic material bar 4 be iron core 3 radially; On the circumference of said iron core 3, the both sides of permanent magnetic material bar 4 are provided with axially wire casing 5 down, in said wire casing 5 down, are wound with the magnet exciting coil 6 of permanent magnetic material bar, the axis of said magnet exciting coil 6 is at iron core 3 radially; Two ends at said 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 in magnet exciting coil 6 generation magnetic fields through the electric current of diode 7.
In the present invention, 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 said motor reel 2 is provided with heat radiation flabellum 8.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (3)
1. the rotor of an excitation DC brushless motor; Said rotor comprises the iron core that is fixed on the motor reel; Said iron core is the cylinder-shaped iron core that stacks vertically with the disc silicon steel sheet, on the circumference of said iron core, being uniformly distributed along the circumference is inlaid with at least two axial permanent magnetic material strips, the pole axis of said permanent magnetic material bar be iron core radially; It is characterized in that; On the circumference of said iron core, the both sides of permanent magnetic material bar are provided with axially wire casing down, in said wire casing down, are wound with the magnet exciting coil of permanent magnetic material bar, the axis of said magnet exciting coil is at iron core radially; Two ends at said 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 said motor reel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101325295A CN102801271A (en) | 2011-05-23 | 2011-05-23 | Rotor for excitation direct-current brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101325295A CN102801271A (en) | 2011-05-23 | 2011-05-23 | Rotor for excitation direct-current brushless motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102801271A true CN102801271A (en) | 2012-11-28 |
Family
ID=47200274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101325295A Pending CN102801271A (en) | 2011-05-23 | 2011-05-23 | Rotor for excitation direct-current brushless motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102801271A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2114235U (en) * | 1992-03-31 | 1992-08-26 | 谢大新 | Exciting dc electric machine |
| WO2007144232A1 (en) * | 2006-06-16 | 2007-12-21 | Siemens Aktiengesellschaft | Ring coil motor |
| CN201352730Y (en) * | 2009-02-10 | 2009-11-25 | 铁岭宝众新能源汽车有限公司 | Excitation direct current brushless motor |
| CN102064634A (en) * | 2011-01-06 | 2011-05-18 | 无锡市中达电机有限公司 | Motor fan structure with check ring |
| CN202076915U (en) * | 2011-05-23 | 2011-12-14 | 无锡顶一电机有限公司 | Rotor of excitation direct-current (DC) brushless motor |
-
2011
- 2011-05-23 CN CN2011101325295A patent/CN102801271A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2114235U (en) * | 1992-03-31 | 1992-08-26 | 谢大新 | Exciting dc electric machine |
| WO2007144232A1 (en) * | 2006-06-16 | 2007-12-21 | Siemens Aktiengesellschaft | Ring coil motor |
| CN201352730Y (en) * | 2009-02-10 | 2009-11-25 | 铁岭宝众新能源汽车有限公司 | Excitation direct current brushless motor |
| CN102064634A (en) * | 2011-01-06 | 2011-05-18 | 无锡市中达电机有限公司 | Motor fan structure with check ring |
| CN202076915U (en) * | 2011-05-23 | 2011-12-14 | 无锡顶一电机有限公司 | Rotor of excitation direct-current (DC) brushless motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121128 |