CN108768127A - A kind of composite stepper motor - Google Patents
A kind of composite stepper motor Download PDFInfo
- Publication number
- CN108768127A CN108768127A CN201810519494.2A CN201810519494A CN108768127A CN 108768127 A CN108768127 A CN 108768127A CN 201810519494 A CN201810519494 A CN 201810519494A CN 108768127 A CN108768127 A CN 108768127A
- Authority
- CN
- China
- Prior art keywords
- rotor
- stator
- core
- stepper motor
- composite stepper
- 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
- H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
- H02K37/10—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type
-
- 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
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a kind of composite stepper motors, including rotor, stator and winding, the rotor is placed in the stator, and there are the stator multiple magnetic poles, the winding to be placed on the magnetic pole, and permanent magnetic steel is embedded on the stator.Sinusoidal rule variation is presented in the composite stepper motor zero load magnetic linkage of the present invention and unloaded back-emf, having except the advantages that precision is high, torque is big, greatly simplifie the structure of rotor, enhance the strength and stability of rotor, to improve the reliability of composite stepper motor, the applicable working condition and application range of motor are expanded.
Description
Technical field
The present invention relates to composite stepper motor fields, and in particular to the body design of composite stepper motor.
Background technology
Stepper motor due to its can opened loop control, good positioning accuracy, it is cheap, be easy to start and stop and positive and negative rotation, nothing
Accumulated error has the characteristics that self-locking function, has been widely used for the every field of production and living.Especially hybrid stepping
Motor has good application prospect since it has many advantages, such as that high resolution, torque be big, temperature characterisitic is stablized.
Traditional composite stepper motor is divided into the parts such as rotor, stator, magnet steel, winding, and magnet steel is placed in the rotor,
Winding technique has axial excitation and radial battery source in stator slot.If there is no magnet steel on rotor, only in the control of stator
It is powered in winding, motor does not generate torque；Stator winding no power, the only effect of rotor magnetic steel, motor is substantially not yet
Generate torque；Only under rotor magnetic steel and the interaction of stator magnetic potential, electromagnetic torque is just generated.So composite stepper motor
The presence that must have permanent magnetic steel, it is in positive polarity to make half rotor core, the other half rotor core is in negative polarity.
Composite stepper motor be originally only applied to low speed, low precision open cycle system in, in recent years also more and more
Apply in wide rotating speed, high-precision servo-control system, this also require stepper motor need to have better high speed performance and
Start-stop performance.But it is placed with permanent magnetic steel among rotor core, reduces the reliability of rotor portion, is also unfavorable for magnetic links
Stability.
Invention content
The present invention exactly thinks and in this, provides a kind of novel mixed stepper motor, improve the reliability of rotor portion,
Solve technical problem of traditional stepper motor under the operating modes such as high speed rotation, frequent start-stop.
The present invention provides a kind of composite stepper motor, including, a rotor, a stator and multiple windings, the rotor are set
In in the stator, there are the stator multiple magnetic poles, each winding to be respectively placed on each magnetic pole, the stator
It is upper to be embedded with permanent magnetic steel.
In a specific embodiment of the invention, it is preferred that the rotor includes the first rotor iron core, the second rotor core, institute
The surface for stating the first rotor iron core and the second rotor core has small tooth, and the small tooth on the surface of the first rotor iron core and second turn
The small tooth tooth pitch having the same on the surface of sub- iron core, but be offset from each other half tooth away from.
In a specific embodiment of the invention, it is preferred that the rotor also includes a linking disk, and the linking disk is placed in
Between the first rotor iron core and the second rotor core, the material and the first rotor iron core and the second rotor of the linking disk
Iron core is identical, and the radius of radius ratio the first rotor iron core and the second rotor core is small.
In a specific embodiment of the invention, it is preferred that the magnetic pole is equipped with multiple small teeth, the tooth pitch of the small tooth and institute
The tooth pitch for stating small tooth on rotor is identical.
In a specific embodiment of the invention, it is preferred that the stator includes the first stator core and the second stator core, institute
It states the first stator core and the second stator core shape same position is symmetrical.
In a specific embodiment of the invention, it is preferred that the permanent magnetic steel, which is placed in first stator core and second, to be determined
Between sub- iron core.
In a specific embodiment of the invention, it is preferred that first stator core and the second stator core are equipped with magnetic pole,
And collectively form the magnetic pole of the stator.
Sinusoidal rule change is presented in advantageous effect, composite stepper motor zero load magnetic linkage of the invention and unloaded back-emf
Change, having except the advantages that precision is high, torque is big, greatly simplifiing the structure of rotor, enhances the intensity of rotor and steady
It is qualitative, to improve the reliability of composite stepper motor, expands the applicable working condition of composite stepper motor and apply model
It encloses.
For allow invention features described above and advantage can be clearer and more comprehensible, special embodiment below, and coordinate institute's accompanying drawings make
Detailed description are as follows.
Description of the drawings
The stereogram of Fig. 1 composite stepper motors of the present invention.
Fig. 2 is the exploded view of the rotor 1 and stator 2 of composite stepper motor in Fig. 1.
Fig. 3 is the vertical view of composite stepper motor of the present invention in Fig. 1.
Fig. 4 is the stereogram of the rotor of composite stepper motor of the present invention.
Fig. 5 is another embodiment of composite stepper motor of the present invention.
Specific implementation mode
It is clearer for the purpose and technical solution that make the embodiment of the present invention, below in conjunction with the attached of the embodiment of the present invention
Figure, is clearly and completely described the technical solution of the embodiment of the present invention.Obviously, described embodiment is of the invention
A part of the embodiment, instead of all the embodiments.Based on described the embodiment of the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of without creative work, shall fall within the protection scope of the present invention.
As depicted in figs. 1 and 2, it is the composite stepper motor of the present invention, the composite stepper motor includes rotor portions
Point 1 and stationary part 2, the rotor portion 1 be placed in inside stationary part 2.
The rotor portion 1, as shown in Fig. 2, the rotor portion 1 includes rotor core 11, rotor core 13 and linking
Disk 12, linking disk 12 are placed between rotor core 11 and rotor core 13.The linking disk 12 is without tooth slot structure
Magnetic conduction disk, to be connected rotor core 11 and 13.The linking disk 12 is formed by the silicon steel plate stacking of same material, and half
Diameter is smaller than the radius of rotor core 11 and 13, mainly plays the role of magnetic conduction, linking and reduces leakage field.
Can also be other numbers of teeth again as shown in figure 4, respectively there is 50 small teeth in rotor core 11 and rotor core 12,
But it must assure that stator is identical with the tooth pitch of rotor.The number of teeth is more, and step angle is smaller, and stepper motor precision is higher.And rotor iron
The small tooth 131 on small tooth 111 and rotor core 13 on the heart 11 mutually staggers half tooth away from there is side set phenomenon.
Stationary part 2 includes permanent magnetic steel 22, stator core 21, stator core 23, and permanent magnetic steel 22, which is placed on two sections, to be determined
Between sub- iron core 21 and 23.22 axial charging of the permanent magnetic steel.
Under the premise of not changing operation principle and motor performance, figure can also be further simplified into electric machine structure
Electric machine structure shown in 5, embedded eight sections of permanent-magnet magnetic steel bars 22, reduce motor cost in stator 2.
Again as shown in figure 3, stator core 21 includes eight magnetic pole 211-218, there are six small teeth 2111 again for each magnetic pole.It is fixed
The also structure having the same of sub- iron core 22, and stator core 21 and stator core 22 are symmetrically placed, between the two without side set.
It is small on the small tooth 121 and stator core 21 and 23 in rotor core 11 and rotor core 12 with reference to figure 4 and Fig. 3
The tooth pitch of tooth 2111 is identical.It is wound with winding 3 on each magnetic pole 211-218.Winding 3 uses concentratred winding, generates radial magnetic field, with
The axial magnetic field of permanent magnetic steel 22 constitutes resultant magnetic field.
It is two-phase hybrid stepping motor as shown in Figure 3, the stator 21 has two-phase octupole, and the magnetic pole at interval is same
One phase.Magnetic pole 211,213,215,217 is A phases, and magnetic pole 212,214,216,218 is B phases, in four magnetic poles 211 of same phase,
In 213,215,217, the polarity of opposite two magnetic poles 211 and 215 be it is identical, the polarity of magnetic pole 213 and 217 be it is identical,
Two not opposite magnetic poles, such as magnetic pole 211 and 213 polarity are opposite.
Since there are side set phenomenons between 1 two sections iron core 11 and 13 of rotor, when the winding 3 in A phases is powered, rotor
It is maximum that the opposite stator A phases of iron core 11, which extremely descend air-gap permeance, and air-gap permeance is most under the opposite stator A phases of rotor core 13
It is small.When rotor 1 rotates, air-gap permeance reduces under 11 corresponding A phases of rotor core, and 13 corresponding phase of rotor core extremely descends air gap
Magnetic conductance increases, and total magnetic conductance on main magnetic circuit is basically unchanged.Similarly, same, two-stage rotor iron when the winding 3 in other phases is powered
The side set structure of the heart 11 and 13 makes composite stepper motor not rotated under the effect of only electrical excitation.
If not having magnet steel 22 on stator 2, only alternate energisation, this motor will not produce according to certain rules in winding 3
Raw torque.If 3 no power of winding, the only effect of magnet steel 22, composite stepper motor also do not generate torque substantially.Two
After 22 axial charging of magnet steel for mixing formula stepping motor, one section is the poles N, and the other end is the poles S.Magnetic field is along 21 He of stator iron
23, air gap, rotor core 11 and 13 form closed circuit.In the range of each magnetic pole on this magnetic circuit, due to two-stage rotor
Tooth be staggered tooth pitch, when one end magnetic conductance increases, other end magnetic conductance necessarily reduces, when ignoring higher hamonic wave, each magnetic pole
Total magnetic conductance be held essentially constant in 1 position difference of rotor, thus total magnetic conductance of entire magnetic circuit is unrelated with 1 position of rotor.
Therefore, only electromagnetic torque is just will produce under the electrical excitation of winding 3 and the permanent magnetism collective effect of magnet steel 22.Magnetic
In the case that steel 22 magnetizes, and the winding 3 on A phase magnetic poles is powered, rotor 1 just has certain stable equilibrium position, i.e. rotor
Position of the tooth to tooth.Electromagnetic torque suffered by two-stage rotor iron core is equidirectional, is all that rotor is made to return to current stabilization
The direction of equilbrium position.This is because at motor both ends, 2 polarity of stator is identical, and 1 polarity of rotor is on the contrary, but be mutually staggered partly
A tooth pitch, so when rotor 1 deviates stable equilibrium position, the direction of both ends torques is consistent.Hybrid stepping electricity
The stable equilibrium position of motivation is rotor heteropolarity extremely descending magnetic conductance maximum and same polarity extremely descend magnetic conductance minimum.
In the case that the winding 3 being switched on B phase magnetic poles is powered, and can there are a new stable equilibrium position, i.e. B
Position of the rotor tooth to tooth under phase magnetic pole.At this moment rotor 1 will rotate to new stable equilibrium under the action of electromagnetic torque
Position.So constantly alternately lead to forward direction A phases, forward direction B phases, reversed A phases, reversed B phases, the novel mixed stepper motor of two-phase is just
It rotates in this way.
The present invention uses above-mentioned technical proposal, has the advantages that：
Since the present invention places permanent magnetic steel 22 on the stator 2, the structure of rotor 1 is greatly simplified, enhances and turns
The strength and stability of son 1 expands the applicable working condition and application range of motor to improve the reliability of motor.
The winding 3 and permanent magnetic steel 22 of the present invention is respectively positioned on stator, greatly simplifies rotor structure.
Sinusoidal rule variation is presented in the empty load of motor magnetic linkage of the present invention and unloaded back-emf, is having precision height, torque
Except the advantages that big, the structure of rotor is greatly simplified, the strength and stability of rotor is enhanced, to improve motor
Reliability expands the applicable working condition and application range of motor.
Although the present invention has been disclosed by way of example above, it is not intended to limit the present invention., any technical field
Middle tool usually intellectual, without departing from the spirit and scope of the present invention, when can make some changes and embellishment, thus it is of the invention
Protection domain should be defined by the scope of the appended claims.
Claims (7)
1. a kind of composite stepper motor, including, a rotor, a stator and multiple windings, the rotor are placed in the stator,
There are the stator multiple magnetic poles, each winding to be respectively placed on each magnetic pole, which is characterized in that on the stator
Embedded with permanent magnetic steel.
2. a kind of composite stepper motor as described in claim 1, which is characterized in that the rotor include the first rotor iron core,
The surface of second rotor core, the first rotor iron core and the second rotor core has small tooth, and the table of the first rotor iron core
The small tooth tooth pitch having the same of the small tooth in face and the surface of the second rotor core, but be offset from each other half tooth away from.
3. a kind of composite stepper motor as claimed in claim 2, which is characterized in that the rotor also includes a linking disk,
The linking disk is placed between the first rotor iron core and the second rotor core, it is described linking disk material with described first turn
Sub- iron core and the second rotor core are identical, and the radius of radius ratio the first rotor iron core and the second rotor core is small.
4. a kind of composite stepper motor as claimed in claim 2, which is characterized in that the magnetic pole is equipped with multiple small teeth, institute
The tooth pitch for stating small tooth is identical as the tooth pitch of small tooth on the rotor.
5. a kind of composite stepper motor as described in claim 1, which is characterized in that the stator include the first stator core and
Second stator core, first stator core and the second stator core shape same position are symmetrical.
6. a kind of composite stepper motor as claimed in claim 5, which is characterized in that it is fixed that the permanent magnetic steel is placed in described first
Between sub- iron core and the second stator core.
7. a kind of composite stepper motor as claimed in claim 5, which is characterized in that first stator core and the second stator
Iron core is equipped with magnetic pole, and collectively forms the magnetic pole of the stator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810519494.2A CN108768127A (en) | 2018-05-21 | 2018-05-21 | A kind of composite stepper motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810519494.2A CN108768127A (en) | 2018-05-21 | 2018-05-21 | A kind of composite stepper motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108768127A true CN108768127A (en) | 2018-11-06 |
Family
ID=64006713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810519494.2A Pending CN108768127A (en) | 2018-05-21 | 2018-05-21 | A kind of composite stepper motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108768127A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111756211A (en) * | 2019-03-28 | 2020-10-09 | Ghsp公司 | Hybrid stepping motor for adjusting rotor magnetic field by using axial coil |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201656735U (en) * | 2010-01-28 | 2010-11-24 | 石永福 | Permanent magnet hybrid stepping motor |
| CN105099121A (en) * | 2014-05-12 | 2015-11-25 | 林氏电机工程公司 | Hybrid stepper motor |
| JP2017060254A (en) * | 2015-09-15 | 2017-03-23 | 株式会社藤田電機製作所 | Two-phase hybrid type stepping motor |
| CN107332426A (en) * | 2017-06-19 | 2017-11-07 | 上海电机学院 | A kind of permanent magnet is installed on the hybrid type stepping motor of stator |
-
2018
- 2018-05-21 CN CN201810519494.2A patent/CN108768127A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201656735U (en) * | 2010-01-28 | 2010-11-24 | 石永福 | Permanent magnet hybrid stepping motor |
| CN105099121A (en) * | 2014-05-12 | 2015-11-25 | 林氏电机工程公司 | Hybrid stepper motor |
| JP2017060254A (en) * | 2015-09-15 | 2017-03-23 | 株式会社藤田電機製作所 | Two-phase hybrid type stepping motor |
| CN107332426A (en) * | 2017-06-19 | 2017-11-07 | 上海电机学院 | A kind of permanent magnet is installed on the hybrid type stepping motor of stator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111756211A (en) * | 2019-03-28 | 2020-10-09 | Ghsp公司 | Hybrid stepping motor for adjusting rotor magnetic field by using axial coil |
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Application publication date: 20181106 |
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