CN106655561B - Permanent magnet brush direct current motor magnetic pole structure - Google Patents
Permanent magnet brush direct current motor magnetic pole structure Download PDFInfo
- Publication number
- CN106655561B CN106655561B CN201710019730.XA CN201710019730A CN106655561B CN 106655561 B CN106655561 B CN 106655561B CN 201710019730 A CN201710019730 A CN 201710019730A CN 106655561 B CN106655561 B CN 106655561B
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- CN
- China
- Prior art keywords
- permanent magnet
- pole
- pole shoes
- iron core
- stator iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/17—Stator cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
- H02K23/02—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting
- H02K23/04—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting having permanent magnet excitation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
- H02K23/40—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by the arrangement of the magnet circuits
- H02K23/405—Machines with a special form of the pole shoes
Abstract
The utility model provides a permanent magnetism has brush direct current motor magnetic pole structure, includes stator core yoke, pole shoe, first permanent magnet and second permanent magnet, the pole shoe uses the central axis of stator core yoke as the axle circumference equipartition and encircles in the inside of stator core yoke, and the interior arc surface of all pole shoes constitutes hollow circular space jointly, first permanent magnet sets up between each pole shoe and stator core yoke, the second permanent magnet sets up between the side of two adjacent pole shoes, and the adjacent end of first permanent magnet and second permanent magnet is equipped with first air gap. The invention provides a magnetic pole structure of a permanent magnet brush direct current motor, which is characterized in that pole shoes and permanent magnets arranged on three sides of the pole shoes jointly form magnetic poles to replace a structure of generating a magnetic field through an excitation winding, so that the motor can obtain larger power output and can be widely applied to industrial products.
Description
Technical Field
The invention relates to the technical field of direct current motors, in particular to a magnetic pole structure of a permanent magnet brush direct current motor.
Background
The current high-power DC motor used in the mechanical equipment such as rolling mill transmission, metal cutting machine, civil machinery, light industry, food machinery, air compressor and the like in metallurgical industry generally adopts a brush DC motor for generating a magnetic field by winding excitation, the excitation mode comprises shunt excitation, shunt excitation and compound excitation, and a cooling fan for cooling the motor is provided with independent power supply. The motor adopts exciting windings to generate magnetic field and is provided with independent fans, so that the DC motor has low efficiency and power factor, complex structure, larger volume, higher manufacturing and using cost and the like.
Disclosure of Invention
The invention provides a magnetic pole structure of a permanent magnet brush direct current motor.
In order to solve the problems, the invention adopts the following technical scheme: the utility model provides a permanent magnetism has brush direct current motor magnetic pole structure, includes stator core yoke, pole shoe, first permanent magnet and second permanent magnet, the pole shoe is a side circular arc, other side plane column structure to regard the central axis of stator core yoke as the axle circumference equipartition and encircle in stator core yoke's inside, and the interior arc face of all pole shoes constitutes hollow circular space jointly for placing the rotor, first permanent magnet sets up between each pole shoe and stator core yoke, the second permanent magnet sets up between the side of two adjacent pole shoes, and the adjacent end of first permanent magnet and second permanent magnet is equipped with first air gap, prevents to produce the magnetic leakage.
The stator is composed of pole shoes, first permanent magnets and second permanent magnets which are arranged on three sides of the pole shoes, wherein the first permanent magnets and the second permanent magnets jointly form magnetic poles, the first permanent magnets and the second permanent magnets are used for generating magnetic fields, the magnetic flux density of the magnetic fields can be enhanced by the permanent magnets arranged on the three sides of the pole shoes, and the pole shoes are used for guiding and gathering the magnetic fields generated by the permanent magnets to form stator magnetic poles.
And a magnetism isolating groove is arranged at the middle line of the contact surface of the inner edge of the stator iron core magnetic yoke and the first permanent magnet and is used for dividing magnetism and increasing the torque of the motor.
The stator iron core magnetic yoke and the machine seat arranged at the outer edge of the stator iron core magnetic yoke are in interference fit into a whole to form a stator.
The first permanent magnet and the second permanent magnet are of cuboid structures, and manufacturing cost of the permanent magnets is reduced.
The rotor is arranged in the hollow circular space formed by the inner arc surfaces of the pole shoes, and a second air gap is arranged between the rotor and the inner arc surfaces of the pole shoes.
The pole shoe is a soft magnetic pole shoe, so that the magnetic flux density can be improved, the demagnetizing generated by armature reaction can be avoided, and the air gap flux density waveform which is the same as that of a common direct current motor magnetic pole can be obtained.
The invention provides a magnetic pole structure of a permanent magnet brush direct current motor, which is characterized in that pole shoes and permanent magnets arranged on three sides of the pole shoes jointly form magnetic poles to replace a structure of generating a magnetic field through an excitation winding, so that the motor can obtain larger power output and can be widely applied to industrial products.
The invention optimizes the magnetic pole structure, improves the magnetic induction intensity, avoids the excitation loss of the motor, improves the efficiency, the power factor and the torque of the motor, reduces the manufacturing and using cost, prolongs the service life, controls the temperature rise of the motor, simultaneously reduces the fan loss because a cooling fan is not required to be arranged independently, and fills the market blank of the industrial high-power permanent magnet combined body excitation brush direct current motor product.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic structural view of a stator core yoke;
fig. 3 is a schematic structural view of a pole shoe.
Wherein, 1, a stator iron core yoke, 2, a first permanent magnet, 3, a first air gap, 4 and a magnetism isolating slot, 5, a stand, 6, a second permanent magnet, 7, a pole shoe, 8, a rotor, 9 and a second air gap.
Detailed Description
As shown in fig. 1, a permanent magnet brush direct current motor magnetic pole structure comprises a cylindrical stator core yoke 1, pole shoes 7, a first permanent magnet 2 and a second permanent magnet 6, wherein the pole shoes 7 are provided with two pairs, the two pairs are circumferentially distributed around the central axis of the stator core yoke 1 and surround the inside of the stator core yoke 1, the inner arc surfaces of all the pole shoes 7 jointly form a hollow circular space, the first permanent magnet 2 is arranged between each pole shoe 7 and the stator core yoke 1, bolts penetrate through the stator core yoke 1 and the first permanent magnet 2 and are fixed with the pole shoes 7, the first permanent magnet 2 is tightly and fixedly connected with the pole shoes 7 and the stator core yoke 1, the second permanent magnet 6 is arranged between the side surfaces of two adjacent pole shoes 7, the second permanent magnet 6 is tightly and fixedly connected with the side surfaces of the pole shoes 7, and the adjacent ends of the first permanent magnet 2 and the second permanent magnet 6 are provided with a first air gap 3.
The stator iron core magnetic yoke 1 and the machine seat 5 arranged at the outer edge of the stator iron core magnetic yoke are in interference fit into a whole.
The first permanent magnet 2 and the second permanent magnet 6 are of cuboid structures.
A rotor 8 is arranged in a hollow circular space formed by the inner arc surfaces of the pole shoes 7, and a second air gap 9 is arranged between the rotor 8 and the inner arc surfaces of the pole shoes 7.
As shown in fig. 2, a magnetism isolating slot 4 is arranged at the center line of the contact surface of the inner edge of the stator iron core yoke 1 with the first permanent magnet 2.
As shown in fig. 3, the pole shoe 7 has a side arc and the rest has a planar side structure.
Claims (3)
1. A permanent magnet brush direct current motor magnetic pole structure is characterized in that: the permanent magnet structure comprises a stator iron core magnetic yoke (1), pole shoes (7), first permanent magnets (2) and second permanent magnets (6), wherein the pole shoes (7) are circumferentially distributed around the central axis of the stator iron core magnetic yoke (1) and encircle the inside of the stator iron core magnetic yoke (1), the inner arc surfaces of all the pole shoes (7) jointly form a hollow circular space, the first permanent magnets (2) are arranged between each pole shoe (7) and the stator iron core magnetic yoke (1), the second permanent magnets (6) are arranged between the side surfaces of two adjacent pole shoes (7), and the adjacent ends of the first permanent magnets (2) and the second permanent magnets (6) are provided with first air gaps (3);
a magnetism isolating groove (4) is formed in the middle line of the contact surface of the inner edge of the stator iron core magnetic yoke (1) and the first permanent magnet (2);
a rotor (8) is arranged in a hollow circular space formed by the inner arc surfaces of the pole shoes (7), and a second air gap (9) is arranged between the rotor (8) and the inner arc surfaces of the pole shoes (7).
2. A permanent magnet brushed dc motor pole structure according to claim 1, wherein: the stator iron core magnetic yoke (1) and the machine seat (5) arranged at the outer edge of the stator iron core magnetic yoke are in interference fit into a whole.
3. A permanent magnet brushed dc motor pole structure according to claim 2, wherein: the first permanent magnet (2) and the second permanent magnet (6) are of cuboid structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710019730.XA CN106655561B (en) | 2017-01-11 | 2017-01-11 | Permanent magnet brush direct current motor magnetic pole structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710019730.XA CN106655561B (en) | 2017-01-11 | 2017-01-11 | Permanent magnet brush direct current motor magnetic pole structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106655561A CN106655561A (en) | 2017-05-10 |
| CN106655561B true CN106655561B (en) | 2023-09-29 |
Family
ID=58842844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710019730.XA Active CN106655561B (en) | 2017-01-11 | 2017-01-11 | Permanent magnet brush direct current motor magnetic pole structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106655561B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5250867A (en) * | 1991-11-20 | 1993-10-05 | General Electric Company | Permanent magnet brushless DC motor having reduced cogging |
| CN101854105A (en) * | 2009-11-24 | 2010-10-06 | 于佳衣 | Single-phase self-starting permanent magnet synchronous motor |
| CN201821243U (en) * | 2010-10-14 | 2011-05-04 | 北京明诚技术开发有限公司 | Permanent magnet generator with pole shoes |
| CN102118072A (en) * | 2011-01-26 | 2011-07-06 | 东南大学 | Automatic accelerating permanent-magnet direct-drive motor |
| CN102545508A (en) * | 2010-12-08 | 2012-07-04 | 余虹锦 | Permanent magnetic brush synchronous alternating-current generator adopting hybrid excitation manner |
| CN102832776A (en) * | 2012-08-10 | 2012-12-19 | 南京航空航天大学 | Axial non-uniform air gap hybrid excitation synchronous machine |
| CN103618427A (en) * | 2013-10-20 | 2014-03-05 | 叶露微 | Low-cost miniature single-phase permanent magnet brushless direct current motor |
| EP2722970A2 (en) * | 2012-10-18 | 2014-04-23 | Robert Bosch Gmbh | Rotor arrangement for an electric machine with permanent magnet excitation |
| CN205647216U (en) * | 2016-05-05 | 2016-10-12 | 愈富制造（河源）有限公司 | Continuous current motor |
-
2017
- 2017-01-11 CN CN201710019730.XA patent/CN106655561B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5250867A (en) * | 1991-11-20 | 1993-10-05 | General Electric Company | Permanent magnet brushless DC motor having reduced cogging |
| CN101854105A (en) * | 2009-11-24 | 2010-10-06 | 于佳衣 | Single-phase self-starting permanent magnet synchronous motor |
| CN201821243U (en) * | 2010-10-14 | 2011-05-04 | 北京明诚技术开发有限公司 | Permanent magnet generator with pole shoes |
| CN102545508A (en) * | 2010-12-08 | 2012-07-04 | 余虹锦 | Permanent magnetic brush synchronous alternating-current generator adopting hybrid excitation manner |
| CN102118072A (en) * | 2011-01-26 | 2011-07-06 | 东南大学 | Automatic accelerating permanent-magnet direct-drive motor |
| CN102832776A (en) * | 2012-08-10 | 2012-12-19 | 南京航空航天大学 | Axial non-uniform air gap hybrid excitation synchronous machine |
| EP2722970A2 (en) * | 2012-10-18 | 2014-04-23 | Robert Bosch Gmbh | Rotor arrangement for an electric machine with permanent magnet excitation |
| CN103618427A (en) * | 2013-10-20 | 2014-03-05 | 叶露微 | Low-cost miniature single-phase permanent magnet brushless direct current motor |
| CN205647216U (en) * | 2016-05-05 | 2016-10-12 | 愈富制造（河源）有限公司 | Continuous current motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106655561A (en) | 2017-05-10 |
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