CN109687608A - A kind of brushed DC motor - Google Patents
A kind of brushed DC motor Download PDFInfo
- Publication number
- CN109687608A CN109687608A CN201910142577.9A CN201910142577A CN109687608A CN 109687608 A CN109687608 A CN 109687608A CN 201910142577 A CN201910142577 A CN 201910142577A CN 109687608 A CN109687608 A CN 109687608A
- Authority
- CN
- China
- Prior art keywords
- slot
- iron core
- stator
- brushed
- coil
- 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.)
- Pending
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000004804 winding Methods 0.000 claims abstract description 37
- 210000000515 tooth Anatomy 0.000 claims abstract description 33
- 230000003993 interaction Effects 0.000 claims description 7
- 238000009827 uniform distribution Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 3
- 210000003781 tooth socket Anatomy 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
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
- 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
- H02K1/26—Rotor cores with slots for windings
-
- 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
- H02K1/26—Rotor cores with slots for windings
- H02K1/265—Shape, form or location of the slots
-
- 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
-
- 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
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
-
- 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
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The present invention provides a kind of brushed DC motors, including stator and rotor, the multipair magnetic pole of the stator of stator is uniformly distributed along the inner wall of the circular cylindrical cavity of shell, the iron core of rotor is arranged in cylindrical cavity body, it has the multiple iron core teeths being distributed uniformly and circumferentially, adjacent iron core teeth limits iron core slot, and winding is arranged in the iron core slot, and winding receives DC current via commutator and brush.When the unstable equilbrium position among the center line of any iron core teeth is located at a pair of of adjacent stator pole, the center line of other iron core teeths is not at the unstable equilbrium position among remaining adjacent stator pole.The winding pitch of the case where relative to a pair of of magnetic pole of the stator, motor of the invention are substantially reduced, and the inactive portion of conducting wire is reduced, and improve the utilization rate of material；Moreover, the cogging torque of rotor reduces, motor oscillating and noise problem are improved.
Description
Technical field
The invention belongs to technical field of motors, and in particular to a kind of brushed DC motor.
Background technique
Brushed DC motor is a kind of typical direct current generator, it is simple with structure, run smoothly, be easily controllable, at
The advantages that this is cheap, can be used for the fields such as sports equipment, vehicle, household electrical appliances.Brushed DC motor includes stator and rotor.Stator peace
Equipped with fixed permanent magnetism magnetic pole iron and brush, magnetic pole generates magnetic field.Rotor includes iron core, winding and commutator, and winding technique exists
In iron core slot.DC power supply, to winding input direct-current electric current, generates rotatory force via brush and commutator under the influence of a magnetic field
Square drives rotor relative to stator rotation.
In the brushed DC motor of the prior art, rotor core slot number is mostly even number, and number of magnetic pole pairs are mostly a pair, this
Motor has problems.Fig. 1 shows the end-view of the brushed DC motor of the prior art, wherein magnetic pole of the stator logarithm P=
1, rotor core slot number Z=16, motor pole span Z/ (2P)=8, motor pitch y=8.Motor pole span refer to two adjacent magnetic poles it
Between distance, can be indicated with the slot number of iron core shared under each magnetic pole；Motor pitch refers to two effective edges of a coil
Across the slot number accounted for, to keep motor performance best, motor pitch should be close to motor pole span.As shown in Fig. 2, the prior art has brush
In direct current generator, single coil is arranged across 8 iron core slots, so that the inactive portion for being located at rotor one end is longer, coiling is utilized
Rate is low, and coiling dosage is big, and manufacturing cost is high.
In addition, the cogging torque of this motor is larger.Cogging torque is permanent magnet and rotor between cog interaction force is cut
Caused by fluctuation to component.Under the parameters same cases such as motor internal-and external diameter, rotor size and magnet steel performance, the tooth socket of motor
Torque amplitude reduces as the periodicity N of each Machine cycle internal spline torque increases.What Fig. 3 showed the prior art has brush
The cogging torque curve of direct current generator, in a Machine cycle, the periodicity N of the cogging torque of the motor is 16, and tooth socket turns
The amplitude of square is up to~230mNm.This cogging torque causes motor to occur significant torque and the fluctuation of speed in operation,
Motor is set to generate unfavorable vibration and noise.
In view of the deficiencies of the prior art, present invention contemplates that coiling dosage can be reduced, reduce vibration and noise by providing one kind
Novel brushed DC motor.
Summary of the invention
It is an object of the invention to solve the problems, such as at least one caused by the prior art.For this purpose, the present invention provides one
Kind brushed DC motor, comprising: stator, including shell and multipair magnetic pole of the stator, cylinder of the multipair magnetic pole of the stator along shell
The inner wall of shape cavity is uniformly distributed；Rotor, including iron core and winding, iron core are arranged in the cylindrical cavity body, have more
A iron core teeth, the multiple iron core teeth are distributed uniformly and circumferentially, and adjacent iron core teeth limits iron core slot, and winding is arranged in institute
It states in iron core slot.Winding is electrically connected to commutator, and commutator slidably contacts with brush, and brush is electrically connected DC power supply, winding
In electric current and magnetic pole of the stator magnetic field interaction, driving rotor rotation.When the center line of any iron core teeth is located at a pair of of phase
When unstable equilbrium position among adjacent magnetic pole of the stator, the center line of other iron core teeths is not in remaining adjacent stator pole
Between unstable equilbrium position.
Brushed DC motor according to the present invention compared with the existing technology the case where middle a pair of of magnetic pole of the stator, has multipair
The winding pitch of the motor of magnetic pole of the stator is substantially reduced, and the inactive portion of conducting wire is reduced, the utilization rate of the material of raising.Moreover,
In the motor, there is no the center lines of multiple iron core teeths to be located at the unstable balance position among multiple adjacent stator poles simultaneously
Place is set, generation cogging torque is put back into due to deviateing unstable balance position in iron core teeth fluctuation, is not present to come in motor of the invention
From the superposition enhancing of the cogging torque of multiple iron core teeths, tooth socket is caused to reduce, motor oscillating and noise problem are improved.
Optionally, the slot number Z of the iron core slot is odd number, also, the slot number Z is not pair of the multipair magnetic pole of the stator
The integral multiple of number P.The angle between two unstable equilbrium positions is n × 360/2P (n is positive integer) as a result, two neighboring
Angle between the center line of iron core teeth is 360/Z, and the quotient of the two is not integer, as a result, in any position, the multiple iron core
In tooth, there is only the center lines of an iron core teeth to be located exactly at unstable equilibrium position.
Optionally, the logarithm P of the multipair magnetic pole of the stator can be 2 or 3；The slot number Z of the iron core slot be 11,13,17,
19, any of 23.Motor pole span Z/2P is less than the half of iron core slot number Z as a result, due to the pitch y approximation motor of winding
The length of pole span Z/2P, the inactive portion for the conducting wire being wound on iron core are substantially reduced, to save material, reduce cost.?
In one Machine cycle of motor, the periodicity of cogging torque is N=Z × 2P, and the tooth socket of motor compared with the prior art turns
Square periodicity significantly increases, and cogging torque is substantially reduced.
Optionally, winding includes Z coil, and the pitch y of coil is that Z is rounded divided by the value of 2P, wherein the of each coil
It is located in the n-th slot on one side, the second side is located in the n-th+y slot, and n is 1 integer into Z, and n+y is more than that Z is then removed with more than Z
Number.
Optionally, commutator includes Z commutator segment, the span yk of commutator segment, wherein the first side of each coil is connected to
M commutator segment, the second side are connected to m+yk commutator segment, and m is 1 integer into Z, and m+yk is more than that Z is then removed with more than Z
Number.The numerical value of yk is determined according to following manner: when the group of the slot number Z of the logarithm P and iron core slot of magnetic pole of the stator is combined into 11 slot, 2 pairs of poles,
13 2 pairs of slot poles, 13 3 pairs of slot poles, 17 2 pairs of slot poles, 19 2 pairs of slot poles, 19 3 pairs of slot poles, 23 2 pairs of slots extremely in one when, commutator segment
Span yk=(Z-1)/P；When the group of the slot number Z of the logarithm P and iron core slot of magnetic pole of the stator is combined into 11 slot, 3 pairs of poles, 17 3 pairs of slot poles,
23 3 pairs of slots extremely in one when, commutator segment span yk=(Z+1)/P.
Optionally, in the Z coil, the starting vessel of i-th of coil is 1+ (i-1) yk slot, and end slot is 1+ (i-
1) yk+y slot, i are 1 integer into Z, and 1+ (i-1) yk, 1+ (i-1) yk+y are more than that Z then removes remainder with Z.As a result,
Coil winding is at Double Layer Winding, that is, coil side inside and outside having in each slot.
Optionally, in the Z coil, the first side of i-th of coil being located in starting vessel is connected to 1+ (i-1)
The second side terminated in slot that is located at of × yk commutator segment, i-th of coil is connected to 1+i × yk commutator segment, and i is 1 one into Z
A integer, 1+ (i-1) × yk, 1+i × yk are more than that Z then removes remainder with Z.The multiple coil ending connects to being formed as a result,
Continuous current path increases the torque of rotor so that there are multiple coils to simultaneously turn on electric current for any moment.
Optionally, brushed DC motor includes multiple brushes, and the quantity of brush and the quantity of magnetic pole of the stator are equal, Duo Ge electricity
Brush is uniformly distributed in a circumferential direction, the Different electrodes of DC power supply is electrically connected to per two adjacent brushes, so that each iron core
Current direction in windings section and neighbouring magnetic direction matching in slot, generate the rotating torque of the same direction.
Detailed description of the invention
The following drawings is used to that some embodiments of the present invention to be preferably presented in conjunction with the explanation of this paper, for explaining that right is wanted
Seek the various features and its advantage limited in book.In the drawings, identical appended drawing reference indicates identical or corresponding part.
Fig. 1 shows the end-view of the brushed DC motor of the prior art；
Fig. 2 shows the coiling schematic diagrames on the brushed DC motor iron core of the prior art；
Fig. 3 shows the cogging torque curve of the brushed DC motor of the prior art；
Fig. 4 shows the end-view of brushed DC motor according to the present invention；
Fig. 5 shows the perspective view of the stator of brushed DC motor according to the present invention；
Fig. 6 shows the perspective view of the rotor of brushed DC motor according to the present invention；
Fig. 7 shows the coiling schematic diagram of brushed DC motor according to the present invention；
Fig. 8 shows another schematic diagram of the coiling of the brushed DC motor of Fig. 7；
Fig. 9 shows the coiling expanded view of the brushed DC motor of Fig. 7；
Figure 10 shows the overall schematic of the brushed DC motor of Fig. 7；
Figure 11 shows the end view of brushed DC motor according to the present invention；
Figure 12 shows the cogging torque curve of brushed DC motor according to the present invention；
Figure 13 shows the end-view and coiling schematic diagram of brushed DC motor according to another embodiment；
Figure 14 shows the end-view and coiling schematic diagram of brushed DC motor according to yet another embodiment.
Specific embodiment
Provided herein is a kind of novel brushed DC motors, to solve problems in the prior art, e.g., rotor core slot
Number is big with magnetic pole of the stator number of poles ratio, causes low around line use ratio；Rotor core slot number and magnetic pole of the stator number of poles are even number institute
The cogging torque of generation is big, causes vibration and noise problem.
Fig. 4 shows the end-view of brushed DC motor according to the present invention.Brushed DC motor includes stator 1 and rotor 2,
Rotor 2 is arranged in the circular cylindrical cavity of stator 1.Fig. 5 shows the perspective view of stator 1.Stator 1 includes columnar shell
11, the permanent magnet pole 12 of multiple tiles is evenly distributed on the inner wall of shell 11.The alternating polarity of magnetic pole 12 is arranged.Phase
There is gap between adjacent two magnetic poles 12.As shown in fig. 7, rotor 2 includes rotor core 21 and is wound on rotor core 21
Winding 22.As shown in fig. 6, rotor core 21 has and extends radially out and equally distributed multiple iron core teeths in the circumferential,
Slot is formed between adjacent iron core teeth, winding 22 is wound in slot.
Motor further includes installing to the brush 13 of stator 1 and installation to the commutator 23 of rotor 2, and commutator 23 includes multiple
Commutator segment that is insulated from each other, being circularized close to arrangement.Brush 13 is electrically connected to DC power supply, and slidably contacts with commutator
Commutator segment in 23, commutator segment are connected to winding 22 according to mode described below.When electric current by brush 13 and commutator 23 press around
When the sequence of 22 conducting of group flows through rotor 2, winding 22 generates a rotating vector magnetic field, and there are one with stator field for the Vector Magnetic Field
Determine angle, two-way interaction drives rotor 2 to rotate, so that the magnetic field in the direction of the Vector Magnetic Field of rotor 2 and magnetic pole of the stator 12
Direction is reached unanimity, and the rotor 2 of brushed DC motor is rotated as a result, with certain revolving speed.
In brushed DC motor of the invention, the number of magnetic pole pairs P of the permanent magnet pole 12 of stator 1 can be 2 pairs of poles, 3
To pole.The slot number of the iron core slot of rotor 2 can be 11,13,17,19,23 slots.Hereafter with rotor slot number for 17 slots, magnetic pole of the stator
It is described for 2 pairs of extremely examples.It should be understood that these descriptions are suitable for the combination of other rotor slot numbers and magnetic pole of the stator logarithm.
Winding pitch approximation motor pole span, motor pole span are expressed as Z/2P with slot number.For example, in rotor slot number Z=17, determining
In the case where sub- number of magnetic pole pairs P=2, motor pole span is Z/ (2P)=17/2 × 2=4.25, and winding 22 includes 17 coils, is taken
Short distance winding pitch y=4, then each coil across slot number be 4.That is, slot embedded by two effective edges of each coil it
Between be separated by 3 slots.
The winding method of coil 22 is specifically described below with reference to Fig. 7 to Fig. 9.
As shown in fig. 7, iron core 21 includes the 1st to the 17th sequentially adjacent slot, these slots are on the circumferencial direction of iron core 21
It is uniformly distributed.Correspondingly, winding 22 includes 17 coil C1-C17, and for convenience of describing, Fig. 7 is shown in bold the 1st to the 4th coil
The side positioned at rotor front end of C1-C4, the side of other coils are shown in dotted line.Side connects two of each coil effectively
Side, side itself for generate driving moment do not contribute be it is invalid, shorten side length facilitate save coil length,
Reduce motor cost.As shown in fig. 7, the first side (showing its section with "+") of the 1st coil C1 is located in the 1st slot of iron core 21,
Its side is in the front end of iron core 21 across 4 slots, and the second side (showing its section with "-") is located in the 5th slot, and in iron core 21
Rear end (opposite end of front end) be connected to the 9th commutator segment；2nd coil C2 is connected to the 9th commutator segment, the first side position in rear end
In the 9th slot, in the front end of iron core 21 across 4 slots, the second side is located in the 13rd slot for side, and connects in the rear end of iron core 21
It is connected to the 17th commutator segment；3rd coil C3 is connected to the 17th commutator segment in rear end, and the first side is located in the 17th slot, and side exists
The front end of iron core 21 is located in the 4th slot across 4 slots, the second side, and is connected to the 8th commutator segment in the rear end of iron core 21；4th line
Enclose C4 and in rear end be connected to the 8th commutator segment, the first side is located in the 8th slot, side in the front end of iron core 21 across 4 slots,
Second side is located in the 12nd slot, and is connected to the 16th commutator segment in the rear end of iron core 21.Remaining coil by this rule across 4 slots successively
Coiling.
Fig. 8 is the coil winding sequential schematic of the brushed DC motor (17 2 pairs of slot pole) of the present embodiment, wherein arrow
Indicate that the coiling direction of each coil, the both ends of dotted line connection are connected to same commutator segment.Winding 22 includes 17 coils, each line
The pitch y=4 of circle, the span that each coil is connect with commutator segment are yk=8.Specifically, the 1st coil from the 1st slot around, and
With winding pitch y=4 coiling, end slot is y+1=5 slot, i.e., the rotor slot that the 1st coil occupies is respectively the 1st, 1+y slot；The
2 coils rise by coiling benchmark of the 1st slot, and the starting vessel of coiling is 1+yk=9 slot, then terminating slot is 1+yk+y=13 slot,
The rotor slot that i.e. the 2nd coil occupies is respectively 1+yk, 1+yk+y slot.And so on, each coil starting vessel is in previous line
Increase yk on the basis of circle starting vessel；Increase y on the basis of coiling starting vessel, as coiling terminates slot.
As a result, in Z coil, slot number where the first side of i-th of coil Ci is 1+ (i-1) × yk divided by more than Z
Number, the slot number where the second side are remainder of 1+ (the i-1) × yk+y divided by Z, and i is any of 1 to 17.
In the present embodiment, yk=8, y=4, specific as follows:
1st, 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16, the first side of 17 coils be placed on the 1st, 9,
17, in 8,16,7,15,6,14,5,13,4,12,3,11,2,10 slots, the second side is placed on the 5th, 13,4,12,3,11,2,10,
1, in 9,17,8,16,7,15,6,15 slots.
Fig. 9 is the brushed DC motor (17 2 pairs of slot pole) and the expansion signal of commutator (17 commutator segment) for being the present embodiment
Figure.Vertical solid line indicates to be located at the first side of corresponding coil in iron core slot, and vertical dotted line indicates to be located at corresponding coil in iron core slot
The second side.Two sides of same coil connect in the front end (upside in figure) of rotor, across y=4 slot of pitch.Two lines
Circle is connected to corresponding commutator segment in the rear end (downside in figure) of rotor.
Commutator 23 is arranged side by side by 17 commutator segments circumferentially continuous.Coil originates coiling position to commutator segment
It is set to the 1st commutator segment, other commutator segments are sequentially adjacent to the 2nd commutator segment, the 3rd commutator segment, the 17th commutator segment of the 4th commutator segment ...
Neighbouring 1st commutator segment.After 1st coil C1 mounts the 1st commutator segment, what connecting line mounted between the 1st coil C1 and the 2nd coil C2 is changed
It is 1+yk=9 commutator segment to piece；The commutator segment that connecting line mounts between 2nd coil C2 and the 3rd coil C3 is 1+yk+yk=
The commutator segment of connecting line mounting between the two neighboring coil of 17 commutator segments ... corresponds to numerical value for previous mounting commutator segment and adds
Span yk=8.
As a result, in Z coil, number of segment that the first side of i-th of coil Ci is connected be 1+ (i-1) × yk divided by
The remainder of Z, the number of segment that the second side is connected are remainder of the 1+i × yk divided by Z, and i is any of 1 to 17.
In the present embodiment, yk=8, y=4, specific as follows:
1st, 2,3,4,5,6,7,8,9,10,11,12,13,14,15,16, the first side of 17 coils be connected to the 1st, 9,
17,8,16,7,15,6,14,5,13,4,12,3,11,2,10 commutator segment, the second side is connected to the 9th, 17,8,16,7,15,6,
14,5,13,4,12,3,11,2,10,1 commutator segment.
In addition, brushed DC motor of the invention uses Double Layer Winding.As shown in fig. 7, the equal position in the both sides of the 1st to 8 coil
In the internal layer of corresponding slot；The both sides of 10th to 17 coil are respectively positioned on the outer layer of corresponding slot；First side of the 9th coil is located at the 14th slot
Internal layer, the second side is located at the outer layer of the 1st slot.Coil 22 can be wound on extremely compactly on iron core 21 as a result,.
In embodiment as described above, the side of each coil in winding 22 in front end across only 4 slots, compared to figure
The case where motor coil of the prior art shown in 2 is across 8 slots, the side inactive portion length of coil of the invention is less
Half, significantly improves the utilization rate of coiling, reduces coiling dosage, reduce manufacturing cost.
Figure 10 shows the overall schematic of brushed DC motor.1st to the 17th commutator segment is insulated from each other and end to end
Form annular commutator 23.The quantity of brush 13 is consistent with the quantity of magnetic pole of the stator 12, is four, and four brushes 13 are in circle
It is uniformly distributed in circumferential direction, also, two adjacent brushes 13 are electrically connected to the Different electrodes of DC power supply.Positioned opposite
One and third brush common potential and the anode for being connected to DC power supply；Positioned opposite second and the 4th brush common potential and even
It is connected to the cathode of DC power supply.Any time of running as a result, the current direction and neighbouring magnetic in coil side in each iron core slot
Field direction matching, generates the rotating torque of the same direction, promotes rotor 22 continuous and smooth rotation.
Figure 11 is the cogging torque signal that rotor core slot number is 17 slots, the brushed DC motor that magnetic pole of the stator is 2 pairs of pole
Figure.Different angle positions is illustrated, the position that 0,90,180,270 degree of angle, θ is located in two neighboring magnetic pole of the stator 12
Between position, rotor tooth is in unstable equilibrium point herein.The active force of permanent magnet pole suffered by rotor tooth at the equalization point
Tangential component be 0；If there is fluctuation, then the tangential component of the active force of permanent magnet pole suffered by the rotor tooth sharply becomes
Greatly.This interaction force between permanent magnet pole and rotor tooth socket tangential component fluctuation cause rotor during operation by
Cogging torque.Cogging torque is bigger, and the vibration and noise of motor is more violent.
In the embodiment shown in fig. 11, since slot number is 17, number of pole-pairs 2, there are 17 rotor tooths, 4 stator magnets
Pole, in the case, when there are the centerlines of a tooth when equalization point of angle, θ=0, in angle, θ=90,180,270
The center line of tooth is not present at its excess-three equalization point of degree.The interaction force of only one tooth and magnetic pole is to tooth socket as a result,
Torque contributes, so that the cogging torque that rotor is subject to is smaller.The situation of this and the motor of the prior art is different, such as Fig. 1
Shown, slot number 16, number of pole-pairs 1, there are 16 rotor tooths, 2 magnetic pole of the stator, when a tooth is in angle, θ=0 degree not
When stable equilibrium point, another tooth position is constantly present in θ=180 degree unstable equilibrium point, there is multiple teeth and magnetic pole as a result,
Interaction force contributes cogging torque, and the cogging torque for causing rotor to be subject to is significantly larger.
Under the parameters same cases such as motor internal-and external diameter, rotor size and magnet steel performance, the cogging torque amplitude of motor will
As the periodicity N of each Machine cycle internal spline torque increases and reduce.Figure 12 is the brushed DC motor (Z of the present embodiment
=17, P=2) cogging torque-rotor angle curve within an electric period.The cogging torque of brushed DC motor is substantially in
Cyclically-varying rule, the periodicity of an electric period internal spline torque are 34, magnetic pole of the stator logarithm P=2, i.e., one mechanical week
Periodicity N=68 (the periodicity N=of the cogging torque of the existing motor of noticeably greater than Z=16, P=1 of cogging torque in phase
16, as shown in Figure 3), amplitude be~58mNm is (significantly less than amplitude~230mN of the cogging torque of prior art motor
M, as shown in Figure 3).The cogging torque of the motor of the present embodiment is substantially reduced compared with the motor of the prior art, motor overall noise and
Vibration problem can be effectively improved.
In other embodiments of the invention, the number of magnetic pole pairs of the stationary part permanent magnet of brushed DC motor are that P is greater than 1
It can be 2 pairs of poles, 3 pairs of poles to pole.Number of magnetic pole pairs greater than 1 pair of pole can reduce motor pole span and pitch, so that winding coil
Invalid segment length reduces, and greatlys save coil method.On the other hand, the iron core slot number Z of the rotor of brushed DC motor be selected from 11,
13, one in 17,19,23.Combination for various number of magnetic pole pairs P and iron core slot number Z, in a Machine cycle of motor
The periodicity of cogging torque meet N=Z × 2P, the cogging torque of periodicity noticeably greater than in the prior art, motor reduces,
Vibration and noise is improved.
In practice, the combination to select number of magnetic pole pairs and rotor core slot number can be required according to the size of motor.For example,
When rotor outer diameter is 40~50mm, rotor slot number is preferably 11 or 13 slots, and magnetic pole of the stator logarithm can be 2 pairs of poles or 3 pairs
Pole；When rotor outer diameter is 50~60mm, rotor slot number is preferably 13 or 17 slots, and magnetic pole of the stator logarithm can be 2 pairs of poles or 3
To pole；When rotor outer diameter is 60~70mm, rotor slot number is preferably 17,19 or 23 slots, and magnetic pole of the stator logarithm can be 2 pairs
Pole or 3 pairs of poles.
For various combinations, Z coil of winding meets following rule:
The starting vessel of i-th of coil is 1+ (i-1) yk slot, and end slot is 1+ (i-1) yk+y slot；
The first side of i-th coil being located in starting vessel is connected to 1+ (i-1) × yk commutator segment, i-th coil
1+i × yk commutator segment is connected to positioned at the second side terminated in slot；
Wherein, i is 1 integer into Z, and 1+ (i-1) yk, 1+ (i-1) yk+y, 1+i × yk is more than that Z is then removed with Z
Remainder；
Wherein, coil pitch y=Z/2P is rounded, and commutator segment span yk is determined according to following manner: when pair of magnetic pole of the stator
The group of the slot number Z of number P and iron core slot is combined into 11 slot, 2 pairs of poles, 13 2 pairs of slot poles, 13 3 pairs of slot poles, 17 2 pairs of slot poles, 19 2 pairs of slot poles,
19 3 pairs of slot poles, 23 2 pairs of slots extremely in one when, commutator segment span yk=(Z-1)/P；As the logarithm P and iron core slot of magnetic pole of the stator
The group of slot number Z be combined into 11 slot, 3 pairs of poles, 17 3 pairs of slot poles, 23 3 pairs of slots extremely in one when, commutator segment span yk=(Z+1)/P.
Figure 13 shows another embodiment of brushed DC motor of the invention, wherein rotor core slot number Z=19, stator
Number of magnetic pole pairs P=2, pole span Z/2P=4.75, coil pitch y=5, commutator segment span are yk=(Z-1)/P=9, tooth socket
Torque cycle number N=Z × 2P=76.
Figure 14 shows the another embodiment of brushed DC motor of the invention, wherein rotor core slot number Z=17, stator
Number of magnetic pole pairs P=3, pole span Z/2P=2.83, coil pitch y=3, commutator segment span are yk=(Z+1)/P=6, tooth socket
Torque cycle number N=Z × 2P=102.
Brushed DC motor according to the present invention can substantially save the dosage of coiling, reduce cost；And it can be significant
Improve the noise and vibration performance of motor, it may be advantageous to be applied to the occasions such as sports equipment, household electrical appliances, vehicle.For example, using this hair
The treadmill of bright brushed DC motor has the advantage of low cost, low noise, low vibration.
It is described in detail above for realizing some embodiments of the present invention, it should be appreciated that the work of these embodiments
It is illustrated with being only that, and does not lie in and limit the scope of the invention in any way, is applicable in or construct.Protection scope of the present invention by
Appended claims and its equivalent way limit.Those skilled in the art can be under the teachings of the present invention to foregoing embodiments
Many changes are made, these changes each fall within protection scope of the present invention.
Claims (10)
1. a kind of brushed DC motor characterized by comprising
The inner wall of stator, including shell and multipair magnetic pole of the stator, circular cylindrical cavity of the multipair magnetic pole of the stator along shell is uniform
Distribution；
Rotor, including iron core and winding, iron core is arranged in the cylindrical cavity body, the multiple with multiple iron core teeths
Iron core teeth is distributed uniformly and circumferentially, and adjacent iron core teeth limits iron core slot, and winding is arranged in the iron core slot；
Wherein, winding is electrically connected to commutator, and commutator slidably contacts with brush, and brush is electrically connected DC power supply, in winding
Electric current and magnetic pole of the stator magnetic field interaction, driving rotor rotation；
Wherein, other when the unstable equilbrium position among the center line of any iron core teeth is located at a pair of of adjacent stator pole
The center line of iron core teeth is not at the unstable equilbrium position among remaining adjacent stator pole.
2. brushed DC motor according to claim 1, which is characterized in that
The slot number Z of the iron core slot is odd number, also, the slot number Z is not the integer of the logarithm P of the multipair magnetic pole of the stator
Times.
3. brushed DC motor according to claim 2, which is characterized in that
The logarithm P of the multipair magnetic pole of the stator is 2 or 3.
4. brushed DC motor according to claim 3, which is characterized in that
The slot number Z of the iron core slot is any of 11,13,17,19,23.
5. brushed DC motor according to claim 2, which is characterized in that
In a Machine cycle of motor, the periodicity of cogging torque is N=Z × 2P.
6. brushed DC motor according to claim 4, which is characterized in that
Winding includes Z coil, and the pitch y of coil is that Z is rounded divided by the value of 2P；
Wherein, the first side of each coil is located in the n-th slot, and the second side is located in the n-th+y slot, and n is 1 any integer into Z,
N+y is more than that Z then removes remainder with Z.
7. brushed DC motor according to claim 6, which is characterized in that
Commutator includes Z commutator segment, the span yk of commutator segment；
Wherein, the first side of each coil is connected to m commutator segment, and the second side is connected to m+yk commutator segment, and m is 1 into Z
Any integer, m+yk are more than that Z then removes remainder with Z；
Wherein, when the group of the logarithm P of magnetic pole of the stator and the slot number Z of iron core slot are combined into 11 slot, 2 pairs of poles, 13 2 pairs of slot poles, 13 slots 3 are right
Pole, 17 2 pairs of slot poles, 19 2 pairs of slot poles, 19 3 pairs of slot poles, 23 2 pairs of slots extremely in one when, commutator segment span yk=(Z-1)/P；
Wherein, when the group of the logarithm P of magnetic pole of the stator and the slot number Z of iron core slot are combined into 11 slot, 3 pairs of poles, 17 3 pairs of slot poles, 23 slots 3 are right
When one in extremely, commutator segment span yk=(Z+1)/P.
8. brushed DC motor according to claim 7, which is characterized in that
In the Z coil, the starting vessel of i-th of coil is 1+ (i-1) yk slot, and end slot is 1+ (i-1) yk+y slot,
In, i is 1 any integer into Z, and 1+ (i-1) yk, 1+ (i-1) yk+y are more than that Z then removes remainder with Z.
9. brushed DC motor according to claim 8, which is characterized in that
In the Z coil, the first side of i-th of coil being located in starting vessel is connected to 1+ (i-1) × yk commutator segment,
The second side terminated in slot that is located at of i-th of coil is connected to 1+i × yk commutator segment, wherein i is 1 any whole into Z
Number, 1+ (i-1) × yk, 1+i × yk are more than that Z then removes remainder with Z.
10. brushed DC motor according to claim 1, which is characterized in that
The brushed DC motor includes multiple brushes, and the quantity of brush and the quantity of magnetic pole of the stator are equal, and multiple brushes are in circumference
Be uniformly distributed on direction, the Different electrodes of DC power supply be electrically connected to per two adjacent brushes so that in each iron core slot around
Current direction and neighbouring magnetic direction matching in group part, generate the rotating torque of the same direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910142577.9A CN109687608A (en) | 2019-02-26 | 2019-02-26 | A kind of brushed DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910142577.9A CN109687608A (en) | 2019-02-26 | 2019-02-26 | A kind of brushed DC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109687608A true CN109687608A (en) | 2019-04-26 |
Family
ID=66197198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910142577.9A Pending CN109687608A (en) | 2019-02-26 | 2019-02-26 | A kind of brushed DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109687608A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023160526A1 (en) * | 2022-02-28 | 2023-08-31 | 广东肇庆爱龙威机电有限公司 | Brush direct current electric motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2687941Y (en) * | 2004-04-09 | 2005-03-23 | 史全德 | Efficient electricity-saving direct-current permanent-magnet machine |
| CN101958625A (en) * | 2009-07-16 | 2011-01-26 | 德昌电机(深圳)有限公司 | Brush motor |
| CN106357077A (en) * | 2015-07-14 | 2017-01-25 | 豪圣电机有限公司 | 6-pole 13-slot and 2-pitch winding pattern applied abs motor |
| CN209267289U (en) * | 2019-02-26 | 2019-08-16 | 江苏雷利电机股份有限公司 | A kind of brushed DC motor |
-
2019
- 2019-02-26 CN CN201910142577.9A patent/CN109687608A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2687941Y (en) * | 2004-04-09 | 2005-03-23 | 史全德 | Efficient electricity-saving direct-current permanent-magnet machine |
| CN101958625A (en) * | 2009-07-16 | 2011-01-26 | 德昌电机(深圳)有限公司 | Brush motor |
| CN106357077A (en) * | 2015-07-14 | 2017-01-25 | 豪圣电机有限公司 | 6-pole 13-slot and 2-pitch winding pattern applied abs motor |
| CN209267289U (en) * | 2019-02-26 | 2019-08-16 | 江苏雷利电机股份有限公司 | A kind of brushed DC motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023160526A1 (en) * | 2022-02-28 | 2023-08-31 | 广东肇庆爱龙威机电有限公司 | Brush direct current electric motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8841813B2 (en) | Brushless synchronous motor having a periodically varying air gap | |
| US9018819B2 (en) | Brushless, ironless stator, single coil motor without laminations | |
| US8890387B2 (en) | Stator and motor | |
| RU2013141791A (en) | ELECTRIC MOTOR AND MOTOR REDUCER | |
| CN105391268B (en) | A kind of cylinder type primary permanent magnet formula transverse flux linear motor | |
| JP3191239U (en) | Electric motor | |
| WO2016004823A1 (en) | Stator, brushless direct current motor, three-phase switch reluctance motor and shaded pole motor | |
| JPH11196558A (en) | Stator coil of rotating machine | |
| KR101200505B1 (en) | DC motor | |
| CN209267289U (en) | A kind of brushed DC motor | |
| CN102957223B (en) | Automotive alternating-current generator | |
| CN109687608A (en) | A kind of brushed DC motor | |
| CN201018318Y (en) | Stator and electric motor equipped with the same | |
| CN102761223B (en) | There is brushless motor | |
| US8629588B2 (en) | Apparatus for generating alternating current power by direct current supply brush that rotates with field pole generator, and apparatus for generating direct current power | |
| CN205829435U (en) | Handheld electric tool and three-phase brushless motor | |
| KR101475469B1 (en) | A motor coil winding method consisting of a concentrated winding | |
| CN112968539A (en) | 48-slot three-phase concentrated winding type permanent magnet motor | |
| CN210041604U (en) | 24 groove 10 utmost point axial magnetic current motor and electric vehicle | |
| WO2011136854A1 (en) | Radial gap motor-generator | |
| CN112615509A (en) | Double-permanent-magnet embedded permanent magnet synchronous motor structure | |
| KR101838888B1 (en) | 6Magnet 10Slot Concentrated Winding Motor | |
| CN214626540U (en) | 48-slot three-phase concentrated winding type permanent magnet motor | |
| JP2015139246A (en) | Rotary electric machine | |
| JP2019216531A (en) | Cylindrical permanent magnet generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |