CN106816969A - Motor stator, motor and electric tool - Google Patents
Motor stator, motor and electric tool Download PDFInfo
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- CN106816969A CN106816969A CN201510839851.XA CN201510839851A CN106816969A CN 106816969 A CN106816969 A CN 106816969A CN 201510839851 A CN201510839851 A CN 201510839851A CN 106816969 A CN106816969 A CN 106816969A
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The present invention relates to a kind of motor stator, its at least two magnetic pole and at least two stator coils for including being produced with rotor transferred side and rotor side；Each magnetic pole has respectively：Pole body, yoke portion, pole shoe and two stator slots, wherein yoke portion include that rotor transferred side yoke portion and rotor produce side yoke portion；Pole shoe includes：Rotor transferred side polar arc, rotor produce side pole arc and the pole shoe surface relative with rotor, and pole shoe surface structure is with symmetrical radiused cross-section；Stator slot is configured between rotor transferred side yoke portion and rotor transferred side polar arc and rotor produces side yoke portion and rotor is produced between side pole arc, and stator coil is arranged in stator slot；Wherein, on radial cross-section, the center line of pole body abreast deviates from the center line on pole shoe surface to rotor transferred side.Motor stator of the invention can improve the efficiency of stator coil and the power/quality ratio of motor and torque efficiency, and cause that the motor of same size has bigger power output scope.
Description
Technical field
The present invention relates to motor component field, and more specifically, it is related to a kind of motor stator, it carries asymmetric wire casing, yoke portion and field structure.The invention further relates to a kind of motor including the motor stator and the electric tool including the motor.
Background technology
Set up in power tool and be equipped with motor, typically alternating current general-purpose motor.Alternating current general-purpose motor generally includes at least two magnetic pole of the stator, and with the ring-shaped yoke portion structure of the symmetrical geometry of composition.Stator coil is set to be located in the stator slot of pole perimeter or wire casing.In the case of energization, stator coil excited target together with magnetic pole of the stator produces electromagnetic field, so that drive rotor motion produces electromagnetic torque.
In design of electrical motor, by the area that stator slot or wire casing are determined according to desired output power of motor and desired rotor output torque, the area is generally limited by the width of the external diameter and internal diameter, the width of magnetic pole and yoke portion of coil, and the area is by the size of limiting coil.For a person skilled in the art it is known that, on the one hand, for the coil diameter selected, the power output of motor depends on the number of turn of coil；On the other hand, the size of coil is also subject to current density and the estimated elevated limitation of temperature.
The size of yoke portion part determines the magnetic flux size that magnetic pole of the stator can be carried together with the area of stator slot or wire casing.If using relatively thin yoke portion, the area of stator slot or wire casing can be made to increase wire casing.But the thickness in yoke portion is limited by the magnetic flux density limit.If magnetic flux density is too high, the magnetic flux of magnetic pole can be caused to reduce and cause bigger iron loss.If the magnetic flux of magnetic pole is too low, the efficiency of motor can be influenceed.Therefore, the area of yoke portion width and stator slot or wire casing is the presence of contradiction in design of electrical motor, it is necessary to take compromise therebetween to reach balance.
It is armature-reaction that another problem for considering is needed in the design of alternating current generator.When rotor (armature) coil electricity, the transverse flux produced by armature coil is intended to make the magnetic flux in each magnetic pole to weaken, so that magnetic flux distributions are twisted and influence the magnetic flux and electric efficiency in magnetic pole.Armature-reaction causes that the magnetic flux density of rotor transferred side polar arc tends to increasing and closeer, and rotor is produced the magnetic flux density reduction of side pole arc.Meanwhile, the produced magnetic field distortion in the rotor transferred side yoke portion close to wire casing of armature-reaction causes that magnetic flux density increases, and is produced in rotor and reduce magnetic flux density in the yoke portion of side.For design of electrical motor, the magnetic flux density of the part of magnetic flux density increase is the main restricting factor to pole flux amount, and is influenceed by motor rotation.
It is therefore desired to design a kind of motor stator for alternating current general-purpose motor, it can at least overcome at least one of above mentioned problem.
The content of the invention
It is an object of the present invention to provide a kind of motor stator for alternating current generator, it obtains balance by asymmetric wire casing, yoke portion and field structure between yoke portion width and stator slot or the area of wire casing, and reduces the influence of armature-reaction.Another object of the present invention is to provide a kind of motor including the motor stator and the electric tool including the motor.
The purpose of the present invention is achieved by the following technical solution：
A kind of motor stator (21), it includes two magnetic poles (30a, 30b) and at least two stator coils, and there is each magnetic pole rotor transferred side and rotor to produce side respectively；And each magnetic pole (30a, 30b) has respectively：Pole body (26a, 26b), yoke portion (21a, 21b), pole shoe (25,24) and two stator slots (250b, 250a；240b, 240a), wherein：
Yoke portion (21a) includes that rotor transferred side yoke portion (210b) and rotor produce side yoke portion (210a)；
Pole shoe (25) includes：Rotor transferred side polar arc (25b), rotor produce side pole arc (25a) and the pole shoe surface (254) relative with rotor (22), and pole shoe surface (254) are configured with symmetrical radiused cross-section；
Stator slot (250b, 250a) is configured between rotor transferred side yoke portion (210b) and rotor transferred side polar arc (25b) and rotor produces side yoke portion (210a) and rotor is produced between side pole arc (25a), and stator coil configuration is to be arranged in stator slot (250b, 250a)；And
Characterized in that, on radial cross-section, the center line of pole body (26a) abreast deviates from the center line of pole shoe surface (254) to rotor transferred side.
Alternatively, the bottom size (G2) of rotor transferred side polar arc (25b) is configured to bigger than the bottom size (G1) that rotor produces side pole arc (25a).
Alternatively, rotor transferred side yoke portion (210b) is configured smaller than the width (K1) that rotor produces side yoke portion (210a) and pole body (26a) junction with the width (K2) of pole body (26a) junction
Alternatively, the stator slot (250a) that the stator slot (250b) of rotor transferred side polar arc side (25b) produces side pole arc (25a) side with rotor is configured with equal cross sectional dimensions.
Alternatively, rotor produces side pole arc (25a) and produces side pole point (251a) with rotor, and rotor transferred side polar arc (25b) has rotor transferred side pole tip (251b), rotor produces the thickness (I2) of the thickness (I1) less than or equal to rotor transferred side pole tip (251b) of side pole point (251a).
Alternatively, rotor produces the radial width (N1) in side yoke portion (210a) and is configured to be transferred to more than rotor-side the radial width (N2) of yoke portion (210b).
Alternatively, to be configured to the center on rotor symmetrical two-by-two into 180 ° at least two magnetic poles (30a, 30b).
A kind of motor, it includes above-mentioned motor stator (21).
Alternatively, motor is alternating current general-purpose motor.
A kind of electric tool, it includes above-mentioned motor.
The beneficial effect of motor stator of the invention is：The efficiency of stator coil and the power/quality ratio of motor are improve, the torque efficiency of motor is improved, and cause that the motor of same size there can be bigger power output scope.
Brief description of the drawings
The present invention is explained in further detail below with reference to accompanying drawing and preferred embodiment, but skilled artisans will appreciate that be, these accompanying drawings are only in order at the purpose of explanation preferred embodiment and draw, and therefore should not be taken as limiting the scope of the invention.Additionally, unless otherwise indicated, accompanying drawing is only intended to conceptually represent the composition or construction of described object and may carry out expansiveness to show, and accompanying drawing is also not necessarily drawn to scale.
Fig. 1 is the cross-sectional view of the motor of prior art.
Fig. 2 is the cross-sectional view of motor according to an embodiment of the invention.
Fig. 3 is the close-up schematic view of embodiment shown in Fig. 2.
Fig. 4 is the close-up schematic view of embodiment shown in Fig. 2.
Fig. 5 is the magnetic flux density schematic diagram of embodiment shown in Fig. 2.
Fig. 6 is the partial schematic diagram of the magnetic pole of an alternative embodiment of the invention.
Specific embodiment
The preferred embodiments of the present invention are described in detail below with reference to accompanying drawing.Skilled artisans will appreciate that, these descriptions are only descriptive, exemplary, and should not be interpreted as limiting protection scope of the present invention.
First, it should be noted that, the top that is previously mentioned herein, bottom, upward, towards inferior orientation term defined relative to the direction in each accompanying drawing, they are relative concepts, and change therefore, it is possible to the diverse location according at it and different practical states.So, these or other orientation term should not be interpreted as restricted term.
In addition, it is also important to note that, for described in the embodiments herein or implicit any single technical characteristic, or any single technical characteristic for being shown in the drawings or implying, it still is able to proceed combination between these technical characteristics (or its equivalent), so as to obtain the other embodiment of the invention not referred to directly herein.
Additionally, in different drawings, identical reference number represents same or about part.
Fig. 1 is the cross-sectional view of the motor of prior art.Wherein, motor 10 is substantially made up of stator 11 and rotor 12, and stator 11 is configured to be generally concerned with vertical center line A-A and horizontal center line B-B is symmetrical.Rotor 12 is also called armature, and rotor 12 is configured to be rotated around axle 13.The peripheral part of rotor 12 is configured with multiple armature slots 120.Rotor coil (not shown) is arranged in these armature slots 120.
Stator 11 includes upper yoke portion 11a and lower yoke portion 11b.Upper yoke portion 11a is connected on the upper pole shoe 15 including upper left polar arc 15a and upper right polar arc 15b by upper pole body 16a, and forms left stator groove 150a and upper right stator slot 150b respectively on the right side in the left side of upper left polar arc 15a and upper right polar arc 15b.Similarly, lower yoke portion 11b is connected on the lower pole shoe 14 including bottom left polar arc 14a and bottom right polar arc 14b by lower pole body 16b, and forms bottom left stator slot 140a and bottom right stator slot 140b respectively on the right side in the left side of bottom left polar arc 14a and bottom right polar arc 14b.Upper left stator groove 150a, upper right stator slot 150b, bottom left stator slot 140a and bottom right stator slot 140b are configured to receive stator coil.
Fig. 2 is the cross-sectional view of motor according to an embodiment of the invention.Wherein, motor 20 is substantially made up of stator 21 and rotor 22.Rotor 22 is also called armature, and rotor 22 is configured to be rotated around axle 23.The peripheral part of rotor 22 is configured with multiple armature slots 220.Rotor coil (not shown) is arranged in these armature slots 220.Preferably, rotor 22 is configured to move in the counterclockwise direction.
It should be noted that in the preferred embodiment of the application, contextual definition according to polar arc and rotor 22 rotor transferred side and stator produce side.Specifically, in rotor transferred side, rotor 22 is intended to that polar arc will be faced, and produces side in rotor, and rotor 22 is intended to depart from the state faced with polar arc.
Similarly, stator 21 includes at least two magnetic poles and at least two stator coil (not shown), and there is each magnetic pole rotor transferred side and rotor to produce side respectively；And each magnetic pole has respectively：Pole body, yoke portion, pole shoe and two stator slots.In the preferred embodiment shown in the drawings, stator 21 includes belonging to the upper yoke portion 21a of upper magnetic pole 30a and belongs to the lower yoke portion 21b of lower magnetic pole 30b.Upper yoke portion 21a is connected on the upper pole shoe 25 including upper left polar arc 25a and upper right polar arc 25b by upper pole body 26a.Left stator groove 250a is formed on the left of upper left polar arc 25a, and upper right stator slot 250b is formed on the right side of upper right polar arc 25b.Similarly, lower yoke portion 21b is connected on the lower pole shoe 24 including bottom left polar arc 24a and bottom right polar arc 24b by lower pole body 26b.Bottom left stator slot 240a is formed on the left of bottom left polar arc 24a, and bottom right stator slot 250b is formed on the right side of bottom right polar arc 24b.Upper left stator groove 250a, upper right stator slot 250b, bottom left stator slot 240a and bottom right stator slot 240b are configured to receive stator coil.Wherein, to be configured to the center on rotor 22 symmetrical into 180 ° for stator 11, and the vertical center line C-C and horizontal center line D-D of rotor 22 are also show in embodiment illustrated.Further, since upper right polar arc 25b and bottom left polar arc 24a is located in rotor transferred side, therefore rotor transferred side polar arc is also called, and because upper left polar arc 25a and bottom right polar arc 24b are produced on side positioned at rotor, therefore is also called rotor and produce side pole arc.Alternatively, as shown in Figure 2, breach or hole can be also arranged as required on yoke portion and pole body, for installation of the motor in casing or base.
Fig. 3 is the close-up schematic view of embodiment shown in Fig. 2.Wherein, Fig. 3 shows a part of the upper magnetic pole 30a of stator 21, and upper yoke portion 21a includes that rotor transferred side yoke portion 210b and rotor produce side yoke portion 210a.Upper left polar arc 25a and upper right polar arc 25b are configured to extend from upper pole body 26a lower ends to both sides, and the inside edge of upper left polar arc 25a and upper right polar arc 25b is configured to form pole shoe surface 254.Pole shoe surface 254 forms round-shaped, so as to corresponding with the external margin of rotor 22.
As illustrated, the size H1 of the upper surface 253a of upper left stator groove 250a is configured to the size H2 of the upper surface 253b more than upper right stator slot 250b so that upper pole body 26a is configured to overall being deviated to the right.Therefore, on radial cross-section, center line E-E deviates to the right relative to the center line of rotor as shown in Figure 2.In a preferred embodiment, the center line E-E of deviation causes that the stator slot that left stator groove 250a compares conventional symmetric design with the cross-sectional area of upper right stator slot 250b increases about 10%-25%.Skilled artisans will appreciate that be, by the upper left stator groove 250a of adjustment and the size of the various pieces on upper right stator slot 250b peripheries, may be such that the cross sectional dimensions of left stator groove 250a and upper right stator slot 250b is roughly equal, this winding that can be conducive to stator coil and arrangement.Therefore, in an embodiment of the present invention, rotor produces the part that the part that side yoke portion 210a couples from upper pole body 26a and rotor transferred side yoke portion 210b couple with upper pole body 26a and is configured with different width, specifically, rotor produces the width K2s of the width K1 more than rotor transferred side yoke portion 210b of side yoke portion 210a sides.Additionally, upper yoke portion 21a is constructed so that rotor produces the radial width N2s of the radial width N1 more than rotor transferred side yoke portion 210b of side yoke portion 210a.Because there is magnetic flux density higher in the yoke portion of the transferred side of conventional string exchange series excitation stator than producing the yoke portion of side, the design uses different yoke portion width, that is rotor transferred side yoke portion 210b width is smaller, and rotor produces that side yoke portion width 210a is larger, so that transferred side yoke portion and producing side yoke portion and having about the same magnetic flux density.Simultaneously, rotor transferred side yoke portion 210a and rotor produce the difference of side yoke portion 210b width, center line is coordinated to offset to the right, coordinate the unequal design of G1, G2 according to expecting to make the cross-sectional area of upper left stator groove 250a and upper right stator slot 250b to roughly equal, make left stator groove 250a and upper right stator slot 250b that there is roughly equal copper factor after identical radical stator copper conductor is wound with.
Upper left polar arc 25a and upper right polar arc 25b extend to upper left pole tip 251a (be also called rotor and produce side pole point) and upper right pole tip 251b (being also called rotor transferred side pole tip) from upper pole body 26a lower ends to both sides.In order to carry desired magnetic flux density, the bottom size G2s of the bottom size G1 less than upper right polar arc 25b of upper left polar arc 25a.Upper left pole tip 251a and upper right pole tip 251b have I1 and I2 respectively, and thickness I1 may be less than or equal to thickness I2.Because the effect of upper left polar arc 25a is only that holding fixed subcoil insulating and is mechanically fixed against stator coil, and upper left polar arc 25a is not intended to carry very big magnetic flux, therefore the overall dimensions of upper left polar arc 25a (including thickness I1 of the bottom size G1 and upper left pole tip 251a of upper left polar arc 25a) can be configured to it is as thin as possible, until manufacture the most thin size to be reached with stamping technology.The reason for thickness or width of G2 are configured to bigger than G1 be：It is to be easiest to approach and more than saturation value (such as 2.0T to 2.2T) that transferred side pole shoe magnetic is close on regular alternating current series excited motor stator, therefore G2 bigger width dimensions can reduce the limitation that rotor transferred side pole shoe saturation is improved to air gap flux density average value, air gap flux density average value higher can be obtained, the distortion degree that air gap flux density is influenceed to be distributed air-gap field by armature-reaction can also be reduced.This is to reducing motor due to low order current harmonics (such as tertiary current harmonic wave) caused by the height saturation of magnetic field, to EMC interference caused by the commutator carbon brush commutation for reducing motor, commutator commutation spark is reduced, motor performance is improved and the raising commutator carbon brush life-span is beneficial to.Asymmetric or with different-thickness the construction of G1 and G2, the design such as N1 and N2 different-thickness, K1 and K2 different-thickness and 26a center lines can be coordinated to offset to the right makes the roughly equal of the area of upper left stator groove 250a and upper right stator slot 250b.
It should be appreciated that due to stator 11, to be configured to the center on rotor 22 symmetrical into 180 °, therefore all parts of the lower magnetic pole 30b of stator 21 also have and corresponding content identical size as described above, position and tectonic relationship.
Fig. 4 is the partial enlarged view of the embodiment shown in Fig. 2.The position relationship between the center line E-E of upper pole body 26a and the center line G-G on pole shoe surface 254 is illustrated below with reference to Fig. 3 and Fig. 4.On the one hand, center line between the left side 252a and right side 252b of upper pole body 26a is as shown in the dotted line E-E in Fig. 4, it means that the right side 252b's apart from J1 and center line E-E away from upper pole body 26a of left side 252as of the center line E-E away from upper pole body 26a is roughly equal apart from J2.On the other hand, the distance of the center line G-G on pole shoe surface 254 supreme left pole tip 251a and upper right pole tip 251b is respectively M1 and M2, and M1 and M2 is roughly equal.As illustrated, on radial cross-section, the center line E-E of the upper pole body 26a and center line G-G on pole shoe surface 254 is simultaneously misaligned, but into the relation for deviateing substantially in parallel.This means upper pole body 26a is deviated to the right relative to pole shoe surface 254, namely abreast deviate to rotor transferred side.
It is easily understood that in the preferred embodiment shown in the drawings, the center line G-G on pole shoe surface 254 is substantially overlapped with the vertical center line C-C of rotor 22.Therefore, the center line F-F of the center line E-E of upper pole body 26a and lower pole body 26b is configured to not overlapped with the vertical center line C-C of rotor 22, but substantially abreast deviate to rotor transferred side relative to the vertical center line C-C of rotor 22 into relation parallel to each other, and upper pole body 26a and lower pole body 26b.
Fig. 5 is the magnetic flux density schematic diagram of embodiment shown in Fig. 2.Specifically, it is illustrated that magnetic flux density when under 12 amperes of the function of current on the motor cross section of the present embodiment.As illustrated, asymmetric wire casing of the invention, yoke portion and field structure cause that the magnetic flux distribution on cross section is relatively uniform, it is to avoid the excessive or too small phenomenon of local flux density occur.Additionally, the total magnetic flux of each magnetic pole can increase 2%-5%, so as to improve motor torque constant (electromagnetic torque under per unit ampere), this is desired for design of electrical motor.
In the preferred embodiment shown in the drawings, stator 11 has two magnetic poles.But, skilled artisans will appreciate that be, stator 11 is also configured to more than two magnetic poles, such as quadrupole motor, and these magnetic poles can be configured to symmetrical two-by-two into 180 ° relative to the center of rotor 22, and remain able to structure as described above feature, and reach technique described above effect.
Preferably, the location and shape of stator slot of the invention are configured to maintain the about the same wire casing area of two wire casings in left and right on each magnetic pole, and this causes that coiling of the winding technique to carry out stator coil still can be assembled with existing stator to be assembled.
Rotor 22 preferably of the invention is set to rotate in the counterclockwise direction.
Fig. 6 is the partial schematic diagram of the magnetic pole of an alternative embodiment of the invention.Wherein, rotor 22 is set to rotate clockwise, and the various pieces of magnetic pole 30a' are configured to be mirrored into symmetrically with vertical center line C-Cs of the magnetic pole 30a in Fig. 2 on rotor 22.At this moment, stator silicon steel section two end faces the pole tip on each polar arc in front and rear exchange, and magnetic pole 30a' is constructed so that the radial dimension of rotor transferred side polar arc is thicker, and rotor produce side pole arc radial dimension it is relatively thin.Therefore, those skilled in the art can disclosure of the invention construct the motor stator of the rotor for being suitable for rotating clockwise, without deviating from the scope of the present invention.
The beneficial effects of the present invention are：In given stator outer diameter and vertical parallel height size, in the case of giving the folded length of motor, motor stator of the invention has more rational magnetic flux distribution.With the series excited motor stator design comparison of conventional symmetrical structure, average magnetic close difference of the stator design of the invention in stator yoke, stator pole body, rotor yoke and rotor teeth portion everywhere is close and in the case of producing identical stator per pole magnetic flux, the cross-sectional area of stator slot can increase about 10%-25%, make it possible to use thicker copper cash on stator, to improve electric efficiency；Or make it possible that installing other brake coil in stator is made brake motor, make to make the actuating coil number of turn of brake motor not reduce or reduce smaller due to increasing brake coil, so that brake motor performance does not decline or decline degree is smaller.
In the case where identical stator is produced per pole magnetic flux, motor stator of the invention can be used the less excitatory number of turn, reduce the copper consumption of motor, reduce copper loss, improve electric efficiency.Under the excitatory ampere-turn of identical, the transverse armature reaction of rotor is complied with, reduce total magnetic resistance and improve per pole average airgap magnetic flux density, every pole magnetic flux is improved 2-5%, increase motor torque constant, improve torque efficiency, motor rated power scope is improve, the peak power output of motor is improve.Or under identical power, or under identical unitary current torque, the folded length of motor being reduced, reduces cost makes motor have power density higher, power to volume ratio higher and torque volume ratio.By using design of the invention, smaller stator outer diameter or vertical height can be used in the motor of equal-wattage.
In a preferred embodiment of the invention, motor stator coordinates the design of rotor silicon steel sheet, makes have more reasonably magnetic flux distribution in motor (including unshakable in one's determination and air gap), and it is near to touch the magnetic that stator transferred side yoke portion and rotor produce side yoke portion.This can be reduced due to the rotor transferred side flux density saturation limit and the degree of saturation high due to interior magnetic field unshakable in one's determination to the distortion degree of air-gap field distribution and reduction caused by armature-reaction transverse magnetic field, motor is reduced due to low order current harmonics (such as tertiary current harmonic wave) caused by the height saturation of magnetic field, reduce EMC interference caused by the commutator carbon brush commutation of motor, commutator commutation spark is reduced, and improves motor performance and commutator carbon brush life-span.
The alternating current general-purpose motor applied on electric tool is typically using the motor of motor stator of the invention.Electric tool is, for example, annular saw, dust catcher and food blender etc..
This specification is disclosed with reference to the accompanying drawings the present invention, and also those skilled in the art is implemented the present invention, including manufacture and using any device or system, from suitable material and the method using any combination.The scope of the present invention is limited by claimed technical scheme, and other examples expected comprising those skilled in the art.As long as such other examples include structural detail not different from claimed technical scheme literal language; or such other examples comprising not having the equivalent structural elements of essential distinction with the literal language of claimed technical scheme, then such other examples should be considered as in the protection domain determined by claims of the present invention claimed technical scheme.
Claims (10)
1. a kind of motor stator (21), its at least two magnetic pole (30a, 30b) and at least two stator coils for including being produced with rotor transferred side and rotor side；Each magnetic pole has rotor transferred side and rotor produces side, and each magnetic pole (30a, 30b) has respectively：Pole body (26a, 26b), yoke portion (21a, 21b), pole shoe (25,24) and two stator slots (250b, 250a；240b, 240a), wherein：
The yoke portion (21a) includes that rotor transferred side yoke portion (210b) and rotor produce side yoke portion (210a)；
The pole shoe (25) includes：Rotor transferred side polar arc (25b), rotor produce side pole arc (25a) and the pole shoe surface (254) relative with rotor (22), and the pole shoe surface (254) is configured with symmetrical radiused cross-section；
Stator slot (250b, 250a) is configured between the rotor transferred side yoke portion (210b) and the rotor transferred side polar arc (25b) and rotor produces side yoke portion (210a) and the rotor and produces between side pole arc (25a), and the stator coil configuration is to be arranged in the stator slot (250b, 250a)；And
Characterized in that, on radial cross-section, the center line of the pole body (26a) abreast deviates from the center line of the pole shoe surface (254) to rotor transferred side.
2. motor stator (21) according to claim 1, characterized in that, the bottom size (G2) of the rotor transferred side polar arc (25b) be configured to it is bigger than the bottom size (G1) that the rotor produces side pole arc (25a).
3. motor stator (21) according to claim 1, characterized in that, the rotor transferred side yoke portion (210b) is configured smaller than the width (K1) that the rotor produces side yoke portion (210a) and the pole body (26a) junction with the width (K2) of the pole body (26a) junction.
4. motor stator (21) according to claim 1, characterized in that, the stator slot (250a) that the stator slot (250b) of rotor transferred side polar arc (25b) side produces side pole arc (25a) side with the rotor is configured with equal cross sectional dimensions.
5. motor stator (21) according to claim 1, it is characterized in that, the rotor produces side pole arc (25a) and produces side pole point (251a) with rotor, and the rotor transferred side polar arc (25b) has rotor transferred side pole tip (251b), the rotor produces the thickness (I2) of the thickness (I1) less than or equal to the rotor transferred side pole tip (251b) of side pole point (251a).
6. motor stator (21) according to claim 1, characterized in that, the radial width (N1) that the rotor produces side yoke portion (210a) is configured to be more than the radial width (N2) that the rotor-side is transferred to yoke portion (210b).
7. motor stator (21) according to any one of the preceding claims, it is characterised in that it is symmetrical two-by-two into 180 ° that at least two magnetic pole (30a, 30b) is configured to the center on rotor.
8. a kind of motor, it includes the motor stator (21) according to any one of claim 1-7.
9. motor according to claim 8, it is characterised in that the motor is alternating current general-purpose motor.
10. a kind of electric tool, it includes motor according to claim 8 or claim 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510839851.XA CN106816969B (en) | 2015-11-27 | 2015-11-27 | Motor stator, motor and electric tool |
| DE102016222990.7A DE102016222990A1 (en) | 2015-11-27 | 2016-11-22 | Electric motor stator, electric motor and power tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510839851.XA CN106816969B (en) | 2015-11-27 | 2015-11-27 | Motor stator, motor and electric tool |
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| Publication Number | Publication Date |
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| CN106816969A true CN106816969A (en) | 2017-06-09 |
| CN106816969B CN106816969B (en) | 2020-07-10 |
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| CN201510839851.XA Active CN106816969B (en) | 2015-11-27 | 2015-11-27 | Motor stator, motor and electric tool |
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| DE (1) | DE102016222990A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165859A (en) * | 2018-02-13 | 2019-08-23 | 苏州宝时得电动工具有限公司 | Applied to the motor of hand held electric tool and the hand held electric tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11870316B2 (en) | 2021-02-02 | 2024-01-09 | Black & Decker, Inc. | Brushless motor including a nested bearing bridge |
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| JP2003153471A (en) * | 2001-11-08 | 2003-05-23 | Matsushita Electric Ind Co Ltd | Motor |
| CN1567678A (en) * | 2003-06-26 | 2005-01-19 | 建准电机工业股份有限公司 | Motor using local magnetic saturation effect of stator to improve starting dead point |
| JP2005020931A (en) * | 2003-06-27 | 2005-01-20 | Hitachi Home & Life Solutions Inc | Commutator motor and motor driven blower |
| CN102651598A (en) * | 2011-02-25 | 2012-08-29 | 日立空调·家用电器株式会社 | Alternating current commutator electric motor and electric blower adopting electric motor |
| CN103812244A (en) * | 2012-11-01 | 2014-05-21 | Lg电子株式会社 | Rotor and motor and/or electric vehicle driving apparatus including the same |
| CN104377844A (en) * | 2013-08-13 | 2015-02-25 | 博世电动工具（中国）有限公司 | Stator of motor and manufacturing method thereof |
| CN104617688A (en) * | 2015-01-30 | 2015-05-13 | 广东威灵电机制造有限公司 | Motor and motor stator |
-
2015
- 2015-11-27 CN CN201510839851.XA patent/CN106816969B/en active Active
-
2016
- 2016-11-22 DE DE102016222990.7A patent/DE102016222990A1/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07298592A (en) * | 1994-04-21 | 1995-11-10 | Hitachi Ltd | Ac commutator motor |
| JP2003153471A (en) * | 2001-11-08 | 2003-05-23 | Matsushita Electric Ind Co Ltd | Motor |
| CN1567678A (en) * | 2003-06-26 | 2005-01-19 | 建准电机工业股份有限公司 | Motor using local magnetic saturation effect of stator to improve starting dead point |
| JP2005020931A (en) * | 2003-06-27 | 2005-01-20 | Hitachi Home & Life Solutions Inc | Commutator motor and motor driven blower |
| CN102651598A (en) * | 2011-02-25 | 2012-08-29 | 日立空调·家用电器株式会社 | Alternating current commutator electric motor and electric blower adopting electric motor |
| CN103812244A (en) * | 2012-11-01 | 2014-05-21 | Lg电子株式会社 | Rotor and motor and/or electric vehicle driving apparatus including the same |
| CN104377844A (en) * | 2013-08-13 | 2015-02-25 | 博世电动工具（中国）有限公司 | Stator of motor and manufacturing method thereof |
| CN104617688A (en) * | 2015-01-30 | 2015-05-13 | 广东威灵电机制造有限公司 | Motor and motor stator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165859A (en) * | 2018-02-13 | 2019-08-23 | 苏州宝时得电动工具有限公司 | Applied to the motor of hand held electric tool and the hand held electric tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106816969B (en) | 2020-07-10 |
| DE102016222990A1 (en) | 2017-06-01 |
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