CN110277865A - A kind of drag cup brushed DC motor and robot - Google Patents
A kind of drag cup brushed DC motor and robot Download PDFInfo
- Publication number
- CN110277865A CN110277865A CN201910527886.8A CN201910527886A CN110277865A CN 110277865 A CN110277865 A CN 110277865A CN 201910527886 A CN201910527886 A CN 201910527886A CN 110277865 A CN110277865 A CN 110277865A
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- Prior art keywords
- magnetic ring
- motor
- drag cup
- ring
- internal magnetic
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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
- H02K1/22—Rotating parts of the magnetic circuit
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/2726—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
- H02K1/2733—Annular 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
- H02K23/58—Motors or generators without iron cores
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/47—Air-gap windings, i.e. iron-free windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
Abstract
The invention belongs to technical field of motors, it is intended to provide a kind of drag cup brushed DC motor and robot, including being socketed on the trombone slide of machine shaft, the internal magnetic ring being sheathed on trombone slide and the drag cup winding assembly for being movably set in internal magnetic ring, wherein, outer magnetic ring is fixedly connected on casing, machine shaft band dynamic load.The present invention, by setting internal magnetic ring to for the annular magnet ring of more even number poles, guarantee that the pole N and the S of inside and outside two magnet rings are extremely corresponding and magnetize mode using sine, efficiently reduce the leakage field of motor, the magnetic flux density waveforms for improving motor internal air gap, enable internal magnetic ring to bring the maximum magnetic property in unit volume into play, and then increase the output torque and delivery efficiency of motor, the torque ripple for reducing motor, reduces the cost of motor.
Description
Technical field
The invention belongs to technical field of motors, are to be related to a kind of drag cup brushed DC motor and machine more specifically
People.
Background technique
Hollow-cup motor belongs to the servo of AC permanent magnet, control motor, because it uses iron-core-free rotor, and thoroughly disappears
In addition to causing electric energy loss since iron core forms vortex in conventional motors, therefore, with energy conservation characteristic outstanding, sensitive convenient
Control characteristic and stable operation characteristic.In general, hollow-cup motor, which is divided into, brush and brushless two types.This type is brushed to have
For, thin stainless steel trombone slide of the existing drag cup brushed DC motor because being equipped with magnetic conduction inside permanent magnet, trombone slide is provided with
Bearing, by rotatable machine shaft in bearing, there are air gaps between trombone slide and machine shaft.
Wherein, the field circuit that permanent magnet is formed is easy that there are motor entirety leakage fields when by trombone slide and machine shaft
Field is big, and the flux density of air gap is unevenly distributed, it is difficult to realize the problems such as sine magnetizes；Simultaneously as the air gap of trombone slide and motor shaft
It is excessive, cause magnetic circuit to be saturated, be easy so that part magnetic circuit there are certain leakage fields, cause the magnetic flux of motor gas-gap close
Degree is difficult to reach optimum state, that is, the flux density of air gap reduces.In addition, excessive uses Nd-Fe-B permanent magnet, there is only materials
The problems such as material waste, motor cost are significantly increased, big there is also motor torque fluctuation.
Summary of the invention
The purpose of the present invention is to provide a kind of drag cup brushed DC motors, have brush straight to solve existing drag cup
Leakage field existing for galvanic electricity machine is big, air gap flux density is unevenly distributed and reduces, the technology that motor cost is high and torque ripple is big is asked
Topic.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of drag cup brushed DC motor is provided,
The drag cup brushed DC motor includes:
Casing, for the hollow structure for offering opening；
Rear case component is covered on the opening of the casing；And
Machine shaft, one end are connected on the inner sidewall of the rear case component, and the other end extends to outside the casing；
In in the casing, the drag cup brushed DC motor further include:
First bearing is sheathed on the machine shaft in the side far from the rear case component；
Second bearing is sheathed on the machine shaft, and is connected on the rear case component；
Trombone slide is socketed on the machine shaft, and one end connects the first bearing, and the other end connects the second bearing；
Internal magnetic ring is sheathed on the trombone slide；And
Drag cup winding assembly is movably set in the internal magnetic ring；
Wherein, the internal magnetic ring is the ring structure that 2P magnetic pole is formed, and P is the positive integer greater than 1.
In one embodiment, the drag cup brushed DC motor further includes outer magnetic ring；
The outer magnetic ring is the ring structure that 2P magnetic pole is formed, and P is positive integer greater than 1, and the outer magnetic ring and institute
The pole N and the S for stating internal magnetic ring are extremely corresponding；
The outer magnetic ring is sheathed on the internal magnetic ring, and is fixedly connected on the casing；
The drag cup winding assembly can surround the machine shaft between the outer magnetic ring and the internal magnetic ring
It moves in a circle.
In one embodiment, the pole N in the internal magnetic ring and the pole S are disposed adjacent, and surround the center of the internal magnetic ring
It is uniformly distributed；The pole N and the pole S in the outer magnetic ring are disposed adjacent, and are uniformly distributed around the center of the outer magnetic ring.
In one embodiment, one end of the trombone slide connects the outer ring of the first bearing, other end connection described the
The outer ring of two bearings.
In one embodiment, in the trombone slide, the internal magnetic ring, the drag cup winding assembly and the outer magnetic ring
Heart line and the central axis of the machine shaft are located along the same line.
In one embodiment, the both ends correspondence of the trombone slide, the internal magnetic ring and the outer magnetic ring aligns.
In one embodiment, the inner surface of the internal magnetic ring is adapted to the outer surface of the trombone slide.
In one embodiment, the label convenient for magnetizing is provided on the periphery wall of the internal magnetic ring and the outer magnetic ring.
In one embodiment, the rear case component includes the lid being covered in the opening, is set to the lid
Brush on inner sidewall and extend to pin on the outside of the lid.
The object of the invention is also to provide a kind of robot, which includes above-mentioned drag cup brushed DC electricity
Machine.
Drag cup brushed DC motor provided by the invention and robot are formed by setting 2P magnetic pole for internal magnetic ring
Magnet ring structure, P is positive integer greater than 1, that is, internal magnetic ring to be changed to the magnet ring of more even number poles, with this without pair
Existing drag cup brushed DC motor have it is cataclysmal on the basis of, can by change magnet ring structure, efficiently reduce motor
Magnetic circuit, improve motor internal air gap magnetic flux density waveforms, increase motor gas-gap flux density, enable internal magnetic ring will be in unit volume
Maximum magnetic property is brought into play, and then increases the output torque and delivery efficiency of motor, reduces the torque ripple of motor, improves electricity
The overall performance of machine, and then reduce motor volume.
Detailed description of the invention
It, below will be in embodiment or description of the prior art to be illustrated more clearly that the technical solution in the embodiment of the present invention
Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the invention
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the surface structure schematic diagram of drag cup brushed DC motor in the embodiment of the present invention；
Fig. 2 is the exploded perspective schematic diagram of drag cup brushed DC motor in Fig. 1；
Fig. 3 is the side view of drag cup brushed DC motor in Fig. 1；
Fig. 4 is the cross-sectional view of drag cup brushed DC motor A-A section in Fig. 3；
Fig. 5 is the stereochemical structure signal that drag cup brushed DC motor removes after shell, rear case component and each bearing in Fig. 1
Figure；
Fig. 6 is the three-dimensional assembling structure schematic diagram in Fig. 4 between the internal magnetic ring and outer magnetic ring of drag cup brushed DC motor；
Fig. 7 is the side view of Fig. 6；
Fig. 8 is the distribution diagram of magnetic line of force of 2 pole hollow-cup motors in demonstration example；
Fig. 9 is the distribution diagram of magnetic line of force of 4 pole drag cup brushed DC motors in the embodiment of the present invention；
Air gap magnetic density waveform figure when Figure 10 is 2 pole hollow-cup motor zero load in demonstration example；
Air gap magnetic density waveform figure when Figure 11 is 4 pole drag cup brushed DC motor zero load in the embodiment of the present invention；
Air gap flux density FFT waveform diagram when Figure 12 is 2 pole hollow-cup motor zero load in demonstration example；
Air gap flux density FFT waveform diagram when Figure 13 is 4 pole drag cup brushed DC motor zero load in the embodiment of the present invention；
Back emf waveform figure when Figure 14 is 2 pole hollow-cup motor zero load in demonstration example；
Back emf waveform figure when Figure 15 is 4 pole drag cup brushed DC motor zero load in the embodiment of the present invention.
Wherein, the label in attached drawing is as follows:
100- casing, 110- cavity, 120- opening, 130- shell bottom；
200- rear case component, 210- lid, 220- pin；
300- machine shaft, 400- first bearing, 500- second bearing；
600- trombone slide, 610- groove, 620- through-hole；
700- internal magnetic ring, the first pole N 710-, the first pole S 720-, 800- outer magnetic ring, the 2nd pole N 810-, the 2nd S of 820-
Pole, 900- drag cup winding assembly.
Specific embodiment
For technical problems, technical solutions and advantages to be solved are more clearly understood, below in conjunction with
Specific drawings and the specific embodiments, further elaborate to the present invention.Wherein, phase in the attached drawing of the specific embodiment of the invention
Same or similar label indicates the same or similar element or element with the same or similar functions.It should be understood that ground, under
Specific embodiment described in face is intended to be used to explain the present invention, and is not intended to limit the present invention.
It should be noted that when element is referred to as " being fixed on " or " being installed on " or " being set to " or " being connected to " another element
On, it, which can be, is directly or indirectly located on another element.For example, when an element referred to as " is connected to " another yuan
On part, it, which can be, is directly or indirectly connected on another element.Term " length ", " width ", "upper", "lower", " left side ",
The orientation or position of the instructions such as " right side ", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outside" are based on attached drawing
Shown in orientation or position, be only easy for describing, should not be understood as the limitation to the technical program.
In addition, term " first ", " second " only for ease of description, be not understood to indicate or imply relative importance or
Person implicitly indicates the quantity of technical characteristic.The meaning of " plurality " is two or more, unless otherwise specifically defined.
In short, for the ordinary skill in the art, can understand the concrete meaning of above-mentioned term as the case may be.
It is detailed to a kind of realization progress of drag cup brushed DC motor provided by the invention below in conjunction with attached drawing 1 to Figure 15
Ground description.
It should be noted that the drag cup brushed DC motor, can use in robot, also available to other suitable productions
In product, herein with no restrictions.
As shown in Figures 1 to 4, the drag cup brushed DC motor, including casing 100, rear case component 200 and motor turn
Axis 300.Wherein, as shown in Figure 2 and Figure 4, casing 100 is usually the hollow structure for offering opening 120.Specifically, casing 100
It can be formed, can also be made of one piece by muti-piece shell combination.As shown in figure 4, casing 100 offer cavity 110 and with appearance
The opening 120 that chamber 110 communicates, rear case component 200 is covered on the opening 120 of casing 100, in this way, casing 100 and rear case component
Closed accommodation space can be formed between 200, in favor of reducing magnetic leakage and protecting the drag cup brushed DC motor.
In the present invention, the side opposite in the opening 120 of casing 100, the shell bottom 130 of casing 100 open up connecting hole (figure
Do not show).As shown in figure 4, one end of machine shaft 300 is connected on the inner sidewall of rear case component 200, machine shaft 300 it is another
One end extends to outside casing 100, and specifically, the other end (namely load end) of machine shaft 300 passes through connecting hole and from connection
Casing 100 is stretched out at hole.
In the present invention, as shown in figure 4, in casing 100, which further includes first bearing
400, second bearing 500, trombone slide 600, internal magnetic ring 700, outer magnetic ring 800 and drag cup winding assembly 900.Wherein, first axle
It holds 400 to be sheathed on machine shaft 300 in the side far from rear case component 200, second bearing 500 is sheathed on machine shaft 300
And it is connected on rear case component 200.As shown in figure 4, trombone slide 600 is socketed on machine shaft 300, and one end connection of trombone slide 600
First bearing 400, the other end connect second bearing 500.Wherein, trombone slide 600 is interference fitted or passes through glue by machine shaft 300
The fixation such as water is bonded together, and ensures that trombone slide 600 is connected on machine shaft 300 and can be 300 turns with machine shaft with this
It is dynamic.As a result, when trombone slide 600 rotates, it can be transmitted by first bearing 400 and second bearing 500 to machine shaft 300
Torque, thus the load rotation for driving the load end of machine shaft 300 to connect.
In the present invention, as shown in figure 4, internal magnetic ring 700 is sheathed on trombone slide 600；Accordingly, outer magnetic ring 800 is sheathed on
Internal magnetic ring 700, and be fixedly connected on casing 100；Drag cup winding assembly 900 between internal magnetic ring 700 and outer magnetic ring 800,
It is movably set in internal magnetic ring 700；It is to be appreciated that as shown in figure 5, internal magnetic ring 700, drag cup winding assembly 900 and outer magnetic ring
It is successively arranged from the inside to the outside between 800, internal magnetic ring 700 and outer magnetic ring 800 are fixed, and drag cup winding assembly 900 can enclose
Central axis around machine shaft 300 moves in a circle.
Wherein, in the present invention, as shown in Figure 6 and Figure 7, internal magnetic ring 700 and outer magnetic ring 800 are the ring that 2P magnetic pole is formed
Shape structure, P are the positive integer greater than 1.In other words, internal magnetic ring 700 can be the even number of poles shapes such as 4 magnetic poles, 6 magnetic poles
At ring structure.Similarly, the ring structure that the even number of poles such as outer magnetic ring 800 or 4 magnetic poles, 6 magnetic poles are formed.
In addition, the pole N and S of internal magnetic ring 700 and outer magnetic ring 800 are extremely corresponding.In this way, internal magnetic ring 700 and outer magnetic ring 800 can be made abundant
Play the maximum magnetic property in unit volume in ground.
It is to be appreciated that internal magnetic ring 700 includes at least two poles N and at least two poles S, accordingly, outer magnetic ring 800 includes
At least two poles N and at least two poles S.In general, to ensure that the magnetic line of force is evenly distributed as far as possible, the pole N and the pole S in internal magnetic ring 700
It is disposed adjacent, and the pole N and the pole S are uniformly distributed around the center of internal magnetic ring 700 in internal magnetic ring 700, similarly, the N in outer magnetic ring 800
Pole and the pole S are disposed adjacent, and the pole N and the pole S are uniformly distributed around the center of outer magnetic ring 800 in outer magnetic ring 800.
Specifically as shown in fig. 7, by taking 4 magnetic poles as an example, internal magnetic ring 700 includes two the first poles N 710 and two the first poles S
720, wherein the first pole N 710 and the first pole S 720 are disposed adjacent；Similarly, outer magnetic ring 800 includes two the 2nd poles N 810 and two
A 2nd pole S 820, wherein the 2nd pole N 810 and the 2nd pole S 820 are disposed adjacent, it is clear that the first pole N 710 in internal magnetic ring 700
It is corresponding in radial directions with the 2nd pole S 820 in outer magnetic ring 800, and the starting point of the first pole N 710 and the 2nd pole S 820
Angle between clearing end is 90 degree.Similarly, the first pole S 720 in internal magnetic ring 700 and the 2nd pole N in outer magnetic ring 800
810 is corresponding in radial directions, and the angle between the first pole S 720 and the starting point and clearing end of the 2nd pole N 810 is 90
Degree.
It is made it should be noted that internal magnetic ring 700 and outer magnetic ring 800 are all made of neodymium-iron-boron Steel material.In addition, because using
Multi-polar structure, the motor are easier to be magnetized by sine to magnetize to each magnetic pole in internal magnetic ring 700 and outer magnetic ring 800, this
Sample can improve motor gas-gap flux waveforms, reduce the torque fluctuations of motor, improve the torque capacity of motor, specifically, motor
Torque coefficient, counter electromotive force the available promotion of coefficient, so, the operational effect of motor is promoted, and temperature rise reduces.Guaranteeing
In the case where motor performance, the dosage of permanent magnet (magnetic material in such as internal magnetic ring 700, outer magnetic ring 800) can reduce, thus
Reduce the cost of motor.
In one embodiment, as shown in figure 4, to reduce the overall volume of motor, it is ensured that the structure of motor is more compact,
And guarantee the smooth transmission of torque, in the cavity 110 of casing 100, outside one end connection first bearing 400 of trombone slide 600
Circle, the outer ring of the other end connection second bearing 500 of trombone slide 600.Specifically, as shown in Figure 4 and Figure 5, in the axial direction of trombone slide 600
On direction, the both ends of trombone slide 600 open up fluted 610 respectively, and trombone slide 600 offers the through-hole 620 communicated with two grooves 610.
Wherein, machine shaft 300 runs through through-hole 620.First bearing 400 passes through machine shaft 300, the outer ring of one end (such as right end) and drawing
The slot bottom of the groove 610 of 600 corresponding end of pipe (such as left end) abuts against, and the other end is (i.e. far from a side of rear case component 200, such as
Left end) gap is in the inner sidewall (specially shell bottom 130) of casing 100.Accordingly, second bearing 500 passes through machine shaft 300,
The outer ring of one end (such as left end) and the slot bottom of the groove 610 of the corresponding end (such as right end) of trombone slide 600 abut against, and the other end is (such as the right side
End) it is fixedly connected on the inner sidewall of rear case component 200.
In one embodiment, as shown in figure 4, to ensure that the torque energy generated is swimmingly transferred on machine shaft 300,
The torque performance of motor is improved, motor production cost, trombone slide 600, internal magnetic ring 700, drag cup winding assembly 900 and outer magnetic are reduced
The center line of ring 800 and the central axis of machine shaft 300 are located along the same line.That is, trombone slide 600, internal magnetic ring 700, sky
Heart cup winding assembly 900, outer magnetic ring 800 and machine shaft 300 are coaxial arrangement.It is to be appreciated that drag cup winding assembly
900 rotate coaxially with machine shaft 300.
In one embodiment, as shown in figure 4, to reduce the volume of motor, it is ensured that the structure of motor is more compact, thus
Production cost is reduced, the both ends correspondence of trombone slide 600, internal magnetic ring 700 and outer magnetic ring 800 aligns.Specifically, a left side for trombone slide 600
The left end at end, the left end of internal magnetic ring 700 and outer magnetic ring 800 aligns, the right end of trombone slide 600, the right end of internal magnetic ring 700 and outer magnetic
The right end of ring 800 aligns.It is to be appreciated that the axial length of trombone slide 600, the axial length of internal magnetic ring 700 and outer magnetic ring 800
Axial length it is identical.Certainly, in fact, the axial length of this three can be slightly different.For example, the axis of trombone slide 600
It can be slightly larger than or be slightly less than the axial length of internal magnetic ring 700 to length.
In one embodiment, as shown in figure 4, similarly, for the volume for being further reduced motor, reducing being produced into for motor
This, the both ends of drag cup winding assembly 900 align respectively with the both ends of internal magnetic ring 700.For example, drag cup winding assembly 900
Left end and the left end of internal magnetic ring 700 align.It is to be appreciated that in the axial length of drag cup winding assembly 900 is also equal to
The axial length of magnet ring 700.
In one embodiment, as shown in figure 4, to ensure that the flux density of motor is evenly distributed, increase motor gas-gap flux density, mention
The torque performance of high motor, the inner surface of internal magnetic ring 700 and the outer surface close fitting of trombone slide 600.It is to be appreciated that internal magnetic ring
700 inner surface configuration and size adapt to the shapes and sizes of the outer surface of trombone slide 600 respectively.So internal magnetic ring 700 and drawing
It is gapless tight fit between pipe 600.
In one embodiment, as shown in figure 4, being carried out just for convenience of to each magnetic pole in internal magnetic ring 700 and outer magnetic ring 800
String magnetizes, and the label (not shown) convenient for magnetizing, accordingly, the periphery of outer magnetic ring 800 are provided on the periphery wall of internal magnetic ring 700
The label (not shown) convenient for magnetizing is provided on wall.It should be noted that the label in internal magnetic ring 700 can be with outer magnetic ring 800
In label it is identical, can also be different, the two can be mark line, can also suitably play the marks of label to be other.
In one embodiment, as shown in Figure 2 and Figure 4, rear case component 200 include lid 210, brush (not shown) and
Pin 220.Wherein, lid 210 is covered in the opening 120 of casing 100；Brush is set on 210 inner sidewall of lid；Pin
220 extend to the outside of lid 210.It specifically in the present embodiment, is interference fit between lid 210 and casing 100, to ensure
Lid 210 and casing 100 securely connect, and the cavity 110 of casing 100 is made to become closed space；Rear case component 200 includes one
To brush and a pair of pins 220, wherein brush is corresponded and is electrically connected with pin 220.It is to be appreciated that brush is logical
Corresponding pin 220 is crossed to be electrically connected with external dc power.
It should be noted that in one embodiment, drag cup winding assembly 900 includes winding coil (not shown), commutation
Device (not shown) and bracket (not shown).Wherein, winding coil and machine shaft 300 are coaxially disposed, and commutator is arranged in motor
On one end of rear shell component, bracket is arranged in rear case component 200 shaft 300.In addition, winding coil and internal magnetic ring 700
There is gap between outer magnetic ring 800.It is to be appreciated that the electric energy of DC power supply enters winding by brush and commutator
Coil, winding coil rotate in the magnetic field that electric current generates, thus winding coil and internal magnetic ring 700 and outer magnetic in movement
The main field interaction that ring 800 is formed, and then electromagnetic torque is generated, it is driven eventually by the rotation of machine shaft 300 negative
Carrying is dynamic.
It should be noted that drag cup brushed DC motor (by taking double magnet ring structures of 4 poles as an example) of the invention and demonstration example
In hollow-cup motor (for 2 extremely single magnet structures) compare, analyze from data, substantially have a characteristic that
(1) shown in comparison diagram 8 and Fig. 9, the magnetic line of force of double magnet ring direct current generators of 4 poles of the invention be distributed it is more uniform, it is right
Ying Di, leakage field will be relatively fewer；
(2) shown in comparison diagram 10 and Figure 11, the air gap magnetic density waveform of double magnet ring direct current generators of 4 poles of the invention is more approached
Sine curve；In addition, double magnet ring direct current generators of 4 poles of the invention are in zero load, air gap flux density shown in comparison diagram 12 and Figure 13
Amplitude in FFT waveform diagram improves.Specifically, the amplitude in demonstration example is 0.633, and the amplitude in the present invention is 0.90, so,
It can be improved 1.43 times.Certainly, in fact, can also also will be different according to the difference of other settings, the amplitude proportion, but it is total
Body trend is that amplitude is improved；
(3) shown in comparison diagram 14 and Figure 15, double magnet ring direct current generators of 4 poles of the invention are in zero load, back emf waveform
In figure, the coefficient of counter electromotive force is improved.Specifically, the coefficient in demonstration example is 20, and the amplitude in the present invention is 31.1, therefore
This, can be improved 1.55 times.Certainly, in fact, different settings according to actual needs, the coefficient ratio of the counter electromotive force can be with
It is varied, but general trend is the coefficient ratio greater than 1 namely coefficient is improved.It is to be appreciated that anti-in the present invention
The sine degree of EMF waveform is good, and harmonic content will significantly reduce.
Generally, for compared to the single permanent magnet drag cup brushed DC motor structure for using 2 poles in demonstration example, this hair
Drag cup brushed DC motor in bright, without big variation, mainly by change magnet ring structure, by internal magnetic ring 700 by 2 poles
It is set as the magnet ring of more even number poles, in addition, also increasing an outer magnetic ring 800, and outer magnetic ring 800 is also configured as more even numbers
The mode of magnetizing also accordingly can be changed to sine sometimes and magnetized by the magnet ring of pole, can pass through internal magnetic ring 700 and outer magnetic as a result,
The multi-polar structure of ring 800 efficiently reduces the magnetic circuit of motor, improves the magnetic flux density waveforms of motor internal air gap, increases motor gas-gap
Flux density enables internal magnetic ring 700 and outer magnetic ring 800 respectively to bring the maximum magnetic property in unit volume into play, and then increases
The output torque and delivery efficiency of motor, reduce the torque ripple of motor, improve the overall performance of motor, and then reduce motor body
Product, reduces the cost of motor.
The present invention also provides a kind of robot, which includes above-mentioned drag cup brushed DC motor.Wherein, the machine
Device people is by using the drag cup brushed DC motor, and response is more stable, and more preferably, cost is lower for torque performance.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention.For the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (10)
1. a kind of drag cup brushed DC motor, comprising:
Casing, for the hollow structure for offering opening；
Rear case component is covered on the opening of the casing；And
Machine shaft, one end are connected on the inner sidewall of the rear case component, and the other end extends to outside the casing；
It is characterized in that, in the casing, the drag cup brushed DC motor further include:
First bearing is sheathed on the machine shaft in the side far from the rear case component；
Second bearing is sheathed on the machine shaft, and is connected on the rear case component；
Trombone slide is socketed on the machine shaft, and one end connects the first bearing, and the other end connects the second bearing；
Internal magnetic ring is sheathed on the trombone slide；And
Drag cup winding assembly is movably set in the internal magnetic ring；
Wherein, the internal magnetic ring is the ring structure that 2P magnetic pole is formed, and P is the positive integer greater than 1.
2. drag cup brushed DC motor according to claim 1, which is characterized in that the drag cup brushed DC motor
It further include outer magnetic ring；
The outer magnetic ring is the ring structure that 2P magnetic pole is formed, and P is positive integer greater than 1, and the outer magnetic ring and described interior
The pole N of magnet ring and S are extremely corresponding；
The outer magnetic ring is sheathed on the internal magnetic ring, and is fixedly connected on the casing；
The drag cup winding assembly can do circle around the machine shaft between the outer magnetic ring and the internal magnetic ring
Zhou Yundong.
3. drag cup brushed DC motor according to claim 2, which is characterized in that the pole N and the pole S in the internal magnetic ring
It is disposed adjacent, and is uniformly distributed around the center of the internal magnetic ring；The pole N and the pole S in the outer magnetic ring are disposed adjacent, and are surrounded
The center of the outer magnetic ring is uniformly distributed.
4. drag cup brushed DC motor according to claim 2, which is characterized in that described in one end connection of the trombone slide
The outer ring of first bearing, the other end connect the outer ring of the second bearing.
5. drag cup brushed DC motor according to claim 2, which is characterized in that the trombone slide, the internal magnetic ring, institute
The central axis for stating the center line and the machine shaft of drag cup winding assembly and the outer magnetic ring is located along the same line.
6. drag cup brushed DC motor according to claim 2, which is characterized in that the trombone slide, the internal magnetic ring and
The both ends correspondence of the outer magnetic ring aligns.
7. drag cup brushed DC motor according to claim 1, which is characterized in that the inner surface of the internal magnetic ring and institute
State the outer surface adaptation of trombone slide.
8. drag cup brushed DC motor according to claim 2, which is characterized in that the internal magnetic ring and the outer magnetic ring
Periphery wall on be provided with convenient for the label that magnetizes.
9. according to the described in any item drag cup brushed DC motors of claim 2 to 8, which is characterized in that the rear case component
Including the lid being covered in the opening, the brush being set on the lid inner sidewall and extend on the outside of the lid
Pin.
10. a kind of robot, which is characterized in that including drag cup brushed DC electricity according to any one of claims 1 to 9
Machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910527886.8A CN110277865A (en) | 2019-06-18 | 2019-06-18 | A kind of drag cup brushed DC motor and robot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910527886.8A CN110277865A (en) | 2019-06-18 | 2019-06-18 | A kind of drag cup brushed DC motor and robot |
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| Publication Number | Publication Date |
|---|---|
| CN110277865A true CN110277865A (en) | 2019-09-24 |
Family
ID=67961059
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910527886.8A Pending CN110277865A (en) | 2019-06-18 | 2019-06-18 | A kind of drag cup brushed DC motor and robot |
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| CN (1) | CN110277865A (en) |
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| CN205647219U (en) * | 2016-05-20 | 2016-10-12 | 深圳市万至达电机制造有限公司 | External rotor permanent magnet brushless dc motors in drag cup armature |
| CN207321075U (en) * | 2017-09-06 | 2018-05-04 | 深圳市万至达电机制造有限公司 | A kind of high power density hollow cup permanent magnetic motor |
| CN207475376U (en) * | 2017-11-28 | 2018-06-08 | 深圳市优必选科技有限公司 | A kind of micro hollow cup brushed DC motor and robot |
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2019
- 2019-06-18 CN CN201910527886.8A patent/CN110277865A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2293153Y (en) * | 1997-06-09 | 1998-09-30 | 夏成明 | Double ring magnetic pole parallel winding rare-earth permanent-magnet DC electric machine |
| CN202034879U (en) * | 2010-12-29 | 2011-11-09 | 北京奇峰聚能科技有限公司 | Inner and outer rotor brushless direct current motor with no iron core loss |
| CN105610289A (en) * | 2015-12-29 | 2016-05-25 | 赵浩 | Alternating current/direct current tachogenerator |
| CN105932823A (en) * | 2016-05-17 | 2016-09-07 | 朱幕松 | Ultra-small coreless brushless high-efficiency hub motor |
| CN205647219U (en) * | 2016-05-20 | 2016-10-12 | 深圳市万至达电机制造有限公司 | External rotor permanent magnet brushless dc motors in drag cup armature |
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Application publication date: 20190924 |
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