CN101442248A - Flat brushless motor - Google Patents
Flat brushless motor Download PDFInfo
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- CN101442248A CN101442248A CNA2008101497092A CN200810149709A CN101442248A CN 101442248 A CN101442248 A CN 101442248A CN A2008101497092 A CNA2008101497092 A CN A2008101497092A CN 200810149709 A CN200810149709 A CN 200810149709A CN 101442248 A CN101442248 A CN 101442248A
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- 230000010349 pulsation Effects 0.000 claims description 66
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 238000001514 detection method Methods 0.000 abstract description 10
- 239000000696 magnetic material Substances 0.000 description 7
- 230000006866 deterioration Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005307 ferromagnetism Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The present invention provides a flat brushless motor without worsening torsion ability in electric conduction and capable of preventing stop point. The flat brushless motor is provided with a stator magnetic panel (10) having drive coils (42-45) and a magnetic pole detection element around a support shaft (30), and a rotor (100) configured with a circular magnet (50) oppositely to the stator magnetic panel (10) and supported on the support shaft (30) reelingly and freely, the circular magnet (50) is provided with a N pole and an S pole alternatively according to sectorial magnetic pole face of arc angle of 60 DEG in periphery, circular holes (h1-h3) for generating torsion pulse of hole centers (C1-C3) are provided at position except a detection reference line (m1) and division lines (m2), (m3) in an area facing the circular magnet (50) of the stator magnetic panel (10), peritremes ( F1-F3) are formed on internal side of the periphery side (50b) of the circular magnet (50).
Description
Technical field
The present invention relates to go for carrying the flat brushless motor of the flat vibrating motor on mobile phone etc.
Background technology
In Japanese kokai publication hei 5-146134 in the disclosed flat brushless motor, as shown in figure 11, have: the circular ring magnet 1 of four magnetic poles is arranged, be provided with in opposite directions with it and as the plate of magnetic material 2 of the yoke of circular ring magnet 1, carry when on described plate 2, being used for the Hall element 3 of position of rotation of detection rotor magnetic pole and energising two drive coils 4 and the notch 5 of rotor magnetic pole being given revolving force, this notch 5 is formed on the outer peripheral edges of plate of magnetic material 2 except the position of Hall element 3 and with on the position its position that to be benchmark cut apart by 90 ° of equalizations.Suppose that rotor magnetic pole is under situation about stopping directly over the drive coil 4, promptly under the pole boundary line between the fan-shaped magnetic pole strength (magnetic force neutral point) L stops at situation directly over the Hall element 3, become and to carry out self-running stop (dead point), and when rotor stops, pole boundary line L stops on otch center line (symmetry axis) O of the notch 5 that produces torque pulsation (コ ギ Application グ ト Le Network), therefore, magnetic pole strength can be positioned at directly over the Hall element 3, so can detect the magnetic pole of Hall element 3, can can avoid stop by switching on once more rotor to along the direction self-starting.
Bias angle theta till from the position of Hall element 3 to otch center line O becomes and occupies more than the medium-sized twice of angle φ than otch.
Patent documentation 1: Japanese kokai publication hei 5-146134 (Fig. 3, Fig. 4)
Summary of the invention
But, in the technology of above-mentioned avoidance stop, have following problems.Promptly, before rotor is about to stop, under the state above the pole boundary line L arrival notch 5, pole boundary line L moves, magnetic attraction until the magnetic line of force that makes the edge that concentrates on notch 5 becomes just in time consistent, the otch center line O of pole boundary line L and notch 5 stops on the otch center line O almost identically, however, before rotor is about to stop, arrive under the state above the notch 5 as the middle body of the main magnetic force of fan-shaped magnetic pole strength, pole boundary line L also can stop at sometimes Hall element 3 roughly directly over, the strategy of avoiding stop can not guarantee enough probability of succesies.Especially, described flat brushless motor as the mobile phone of flat vibrating motor that eccentric hammer is set on rotor in, Chang Yin follow the gravity direction of the eccentric hammer that the attitude of motor when stopping to produce and cause pole boundary line L can not arrive notch 5 above.
Figure 12 is the partial top view that expression pole boundary line L stops at the state directly over the notch 5.This notch 5 is fan-shaped, the some P from magnetic pole (for example N utmost point) face
1The magnetic line of force that comes out in overlooking state as string path W
1The shortest some Q on the radial line edge 5a of arrival notch 5
1, pass then in the plate of magnetic material 2, therefore,, on the other hand, also exist the some P from the magnetic pole strength although be expected to produce effective torque pulsation composition
2The magnetic line of force that comes out in overlooking state as string path W
2The shortest some Q on the radial line edge 5a of arrival notch 5
2With conduct footpath thread path W in overlooking state
3The shortest some R on the string of a musical instrument edge 5b of arrival notch 5
2Situation.Such situation also is the same for the point of extremely going up with the symmetrical S of above-mentioned point.Therefore, in the fan-shaped notch 5, overlook under the state the footpath thread path substantially than the short area E in string path in, the magnetic line of force string of a musical instrument edge 5b that only can fly to, thereby in fact can not look to described area E to produce torque pulsation.
At this, in order to strengthen the generation of torque pulsation, can consider to form notch 5 deeplyer to central side, and lengthening radial line edge 5a.But, the expansion of otch area is also less big, and the magnetizing force of part dies down near the pole boundary line L, what increase to some extent between the magnetic line of force in the string path of central side even if make, the enhancing of torque pulsation also almost can not with as the torque contraction in length that produces the torque main cause amount suitable.On the other hand, though notch 5 on the circular arc direction, form wider width, strengthen the shared angle φ of otch, also still exist to produce the area E of torque pulsation, increase and corresponding torque performance when making energising worsens along with flux leaks.Therefore, even fan-shaped notch 5 enlarges the width of its sky portion, also be difficult to strengthen torque pulsation.
In view of the above problems, problem of the present invention provides a kind of torque performance in when energising that can make and does not worsen, and can avoid the flat brushless motor of stop really.
The flat brushless motor that the present invention relates to is provided with stator magnetic sheet and rotor, and the stator magnetic sheet has carried a plurality of drive coils and the magnetic pole detecting element of the generation rotating magnetic field of arranging around fulcrum; With n is natural number, and rotor and stator magnetic sheet be the layout circle annular magnet Face to face, and this circular ring magnet alternately has the N utmost point and the S utmost point on the direction of rotation of the fan-shaped magnetic pole strength upper edge of 180 °/n of arc chord angle, and the rotor rotation is supported on the fulcrum freely.In the stator magnetic sheet with circular ring magnet facing to the zone in, symmetrical torque pulsation produces and uses hole, centerline hole to be positioned at except the position of magnetic pole detecting element and with the position the position that to be benchmark cut apart by 180 °/n equalization, this position about the centerline hole of the pivot that passes rotor to be provided with flat shape; From pivot and torque pulsation produce with the tangent formed hole of a pair of tangent line of the peritreme in hole occupy angle (α) be 180 °/below the n, peritreme is formed on the inboard of the outer peripheral edges of circular ring magnet.
The present invention, first, in the stator magnetic sheet with circular ring magnet facing to the zone in, it or not outer circumferential side formation notch at the stator magnetic sheet, use the hole but form torque pulsation generation with the peritreme that is surrounded by the base plate of stator magnetic sheet, outside peritreme with counter-rotating central side, therefore, pole boundary line when rotor stops between the N utmost point and the S utmost point torque pulsation produce with above the centerline hole in hole with it under the consistent state, a part of coming the magnetic line of force of magnetic pole strength arrives the shortest point of outside peritreme, thereby has strengthened the generation of torque pulsation.So, expansion torque pulsation generation is occupied angle (α) to the hole with the hole set for significantly near 180 °/n, then can obtain effective torque pulsation.Torque pulsation is produced under the state that covers fully with the hole at fan-shaped magnetic pole strength, the middle body that magnetic force in the fan-shaped magnetic pole strength is the strongest produces with the center in hole is neighbouring with torque pulsation and overlaps, it is very big that torque pulsation becomes, but torque pulsation can be produced forms greatlyyer with the hole, by the feasible bottom parts narrowed width that overlaps with fan-shaped magnetic face in the both sides in this hole, therefore, near with respect to rotor the torque pulsation greatly the very little anglec of rotation sharply becomes big, can sharpening as maximal point, therefore, can effectively eliminate the stop of rotor.Therefore, can avoid stop really.
The second, feature of the present invention is the inboard that peritreme is formed on the outer peripheral edges of circular ring magnet.Because the magnetic line of force from the outer peripheral face of circular ring magnet also focuses on the outside peritreme of despining central side, leak the deterioration of torque performance in the time of can not causing energising so can suppress flux.
Owing to when non-energising, produce torque pulsation, even thereby below form to such an extent that more also have no relations with the hole torque pulsation generation at drive coil, magnetic pole detecting element.This can improve space efficiency.
Be preferably, according to the angle around pivot, the position of magnetic pole detecting element and produce apart from its nearest torque pulsation is occupied below half of angle (α) for the hole with the formed drift angle of the centerline hole in hole (β).When rotor stopped, the pole boundary line overlapped with centerline hole and stops from the state that overlaps with a side's of peritreme tangent line, and therefore, rotor can positively rotate between half of angle (α) occupied in the hole by torque pulsation.Therefore, drift angle (β) is received in the hole and occupies between half of angle (α), thereby the pole boundary line can not stop at the position of magnetic pole detecting element.Also can be 180 °/n-α＜β.
And then, in order to make only 1 the shortest point in the magnetic pole strength from the magnetic line of force arrival peritreme that is received in the point in the torque pulsation generation usefulness hole, be preferably peritreme and comprise the inner arc edge of pivot side and the outer arc edge of despining central side, can be the identical inner arc edge of radius with the directly continuous circumferential rim of outer arc edge, can be by straight line edge inner arc edge and the continuous oval edge of outer arc edge that radius is identical, also can be by straight line edge inner arc edge and the big continuous fan-shaped edge of outer arc edge of radius that radius is little.The normal direction composition that produces with the pole boundary line of the attractive magnetic force of the each point in the hole according to torque pulsation can positively produce torque pulsation, and the zone that can not produce torque pulsation almost can be eliminated, and can strengthen torque pulsation.
Use the hole if having only place torque pulsation to produce in the stator magnetic sheet, torque pulsation sometimes may be not enough, and only a magnetic pole is excessively biasedly by magnetic attraction, and rotor rotated can be uneven during therefore for energising.What especially, increased end tank wobble under rotor has the situation of eccentric hammer may.At this, be preferably, the stator magnetic sheet is provided with identical shaped n torque pulsation and produces and use the hole, and n torque pulsation generation is positioned at each about the rotational symmetric position of 360 °/n of pivot with the centerline hole in hole.But balance produces torque pulsation at each magnetic pole well thus, and strengthens torque pulsation.
During n=1, become and have the circular ring magnet that arc chord angle is 180 ° a fan-shaped magnetic pole strength, therefore, the hole occupied be difficult to miniaturization when angle (α) is set near described arc chord angle.Arc chord angle is 90 ° during n=2, the hole can be occupied angle (α) on the principle to be set to 90 ° of arc chord angles, but the pulse period that torque pulsation produces is elongated.Arc chord angle is 60 ° during n=3, the hole can be occupied angle (α) on the principle to be set to 60 ° of arc chord angles.And on principle, can set too under the situation more than the n=4, but drift angle (β) becomes very little, so the position of magnetic pole detecting element is near the pole boundary line and magnetic force is died down.Even only cause pole boundary line slight vibration on the both forward and reverse directions at center, hole, may will cause rotor self-starting in the opposite direction mistakenly because of impacting to wait.Most preferably be n=3.
Have at rotor under the situation of eccentric hammer, be suitable as flat vibrating motor.Not only can effectively avoid stop as described above, and the inertia motion of rotor is strong when stopping, and can produces braking action, can shorten the duration of inertia rotation by the generation of the torque pulsation of brute force.
According to flat brushless motor of the present invention, can unlikelyly when energising cause the deterioration of torque performance and can avoid stop really.
Description of drawings
Fig. 1 is the axonometric drawing of the flat vibrating motor that relates to of expression embodiments of the invention.
Fig. 2 is the assembling axonometric drawing of the flat vibrating motor of Fig. 1.
Fig. 3 is the vertical view of the stator magnetic sheet in the flat vibrating motor of presentation graphs 1.
Fig. 4 is the axonometric drawing of the stator magnetic sheet among Fig. 1.
Fig. 5 is that expression is the vertical view of power supply with the state on the stator magnetic sheet of flexible base, board coincidence in Fig. 1.
Fig. 6 is the vertical view of the stop of the rotor in the flat vibrating motor of presentation graphs 1.
Fig. 7 is the vertical view of the stop position of the rotor in the flat vibrating motor of presentation graphs 1.
Fig. 8 is the vertical view that the magnetic pole of the rotor in the flat vibrating motor of presentation graphs 1 produces torque pulsation the state that covers with the hole.
Fig. 9 amplifies torque pulsation in the stop position of rotor of presentation graphs 1 to produce partial top view with the hole.
Figure 10 is that the torque pulsation of the other hole shape in the stator magnetic sheet of presentation graphs 1 produces the vertical view with the hole.
Figure 11 (A) is the vertical view of the existing flat brushless motor of expression, and Figure 11 (B) is the amplification profile of the notch of its plate of magnetic material of expression.
Figure 12 is the partial top view of the notch in the flat brushless motor that amplifies among expression Figure 11.
Symbol description
1 circular ring magnet
2 plate of magnetic material
3 Hall elements
4 drive coils
5 notchs
5a radial line edge
5b string of a musical instrument edge
10 stator magnetic sheets
11 bearings
12 base plate
13 terminals are accepted board
20 packing rings
30 fulcrums
40 power supply flexible base, boards
41 medium pores
42～45 hollow flatwise coils
46 switch integrated circuits
47 electric capacity
48 projection pieces
50 circular ring magnets
All lateral margins in the 50a
50b periphery lateral margin
60 eccentric hammer
70 radial-thrust bearings
80 rotor plates
90 covers
100 rotors
The C pivot
C
1～C
3The center, hole
D
1, d
1The inner arc edge
D
2The outer arc edge
E can not produce the zone of torque pulsation
F
1～F
3Peritreme
F
1～F
3The edge part
G
1, G
2The straight line edge
G
1', G
2' the radial line edge
h
1～h
3Torque pulsation produces uses the hole
L pole boundary line (magnetic force neutral point)
m
1The detection reference line
m
2, m
3Cut-off rule
O otch center line (symmetry axis)
P
1～P
3Point on the magnetic pole strength
Q
1, Q
2, R
2, T
1～T
3The shortest point
S
1, S
2Tangent line
W
1, W
2The string path
W
3The footpath thread path
X centerline hole (symmetry axis)
α occupies angle in the hole
β, θ drift angle
The φ otch occupies angle
γ tangent line and pole boundary line angulation
Embodiment
Below, embodiments of the present invention are described with reference to the accompanying drawings.Fig. 1 is the axonometric drawing of the flat vibrating motor that relates to of expression embodiments of the invention, Fig. 2 is the assembling axonometric drawing of this flat vibrating motor, Fig. 3 is the vertical view of the stator magnetic sheet in the flat vibrating motor of presentation graphs 1, Fig. 4 is the axonometric drawing of the stator magnetic sheet among this figure, and Fig. 5 is that expression is the vertical view of power supply with the state on the stator magnetic sheet of flexible base, board coincidence in Fig. 1.
Platypelloid type in the present embodiment (Coin shape) vibrating motor is a brushless electric machine, be provided with: stator magnetic sheet 10, fulcrum 30, drive with hollow flatwise coil 42～45, power supply flexible base, board 40, the cover 90 of rotor plate 80 and magnetic material, this stator magnetic sheet 10 has bearing 11 and is used as yoke, overlapping packing ring 20 also is pressed into this bearing 11 with an end of this fulcrum 30 on bearing 11, this driving is deposited on the stator magnetic sheet 10 with hollow flatwise coil 42～45, around medium pore 41, have four these drivings with hollow flatwise coil 42～45, in the switch integrated circuit 46 of Hall element (not shown) and electric capacity 47 are housed arrange and carry on this power supply usefulness flexible base, board 40, this rotor plate 80 has circular ring magnet 50 respectively below, on outer peripheral edges, has circular-arc eccentric hammer 60, has radial-thrust bearing 70 at central portion, this circular ring magnet 50 is that 60 ° fan-shaped magnetic pole strength alternatively is provided with the N utmost point and the S utmost point according to arc chord angle upwards in week, this rotor plate 80 rotates and is supported on freely on the fulcrum 30, the cover 90 of this magnetic material is as yoke, is pressed into fixing by the other end of fulcrum 30 and the lower end is fixed on the stator magnetic sheet 10.Rotor plate 80 and annular rotor magnet 50 constitute and 10 corresponding rotors 100 of stator magnetic sheet.
Power supply has tab portion 48 with flexible base, board 40, tab portion 48 has the power supply template (not shown) that the welding of scolding tin externally ground connects folding lead (not shown), and this power supply is formed with the circuit layout (not shown) of the regulation of the terminal that is used for connecting electric capacity 47, switch integrated circuit 46 and hollow flatwise coil 42～45 with flexible base, board 40.
Stator magnetic sheet 10 is the flat boards with the magnetic of iron grade (ferromagnetism) plate stamping and forming, have integratedly the base plate that is used for forming flat vibrating motor circular base plate 12 and accept to power from outstanding being used for of a part of the outer circumferential side of base plate 12 and accept board 13 with the terminal of the tab portion 48 of flexible base, board 40.Has the hole center C on the rotation symmetric position of center (pivot of rotor 100) C, being formed with on this stator magnetic sheet 10 at 120 ° about bearing 11
1～C
3Identical shaped three torque pulsations produce and use circular hole h
1～h
2, h
3This torque pulsation produces uses circular hole h
1, h
2, h
3For circle just and have a circumference peritreme F
1～F
3From center C and torque pulsation generation circular hole h
1～h
3Peritreme F
1～F
3Tangent a pair of tangent line S
1, S
2It is below 60 ° about 50 ° of the arc chord angle of fan-shaped magnetic pole strength that angle [alpha] is occupied in formed hole.
Founding fulcrum 30 on described stator magnetic sheet 10, will power in the above correctly overlaps under the state of also hot melt apposition with flexible base, board 40, as shown in Figure 5, and detection reference line m
1Pass the magnetic force detection position of the Hall element of adorning in the switch integrated circuit 46 (not shown), this detection reference line m
1With nearest torque pulsation generation circular hole h
1The hole center C
1Formed drift angle β is 15 °, and this drift angle β is that the hole is occupied below half of angle [alpha].Therefore, switch integrated circuit 46 below have torque pulsation and produce and to use circular hole h
1, and below hollow flatwise coil 42,43, have torque pulsation generation circular hole h
2, below hollow flatwise coil 44,45, have torque pulsation generation circular hole h
3, and with this detection reference line m
1Cut-off rule m for the benchmark trisection
2, m
3With the hole center C
2, C
3Do not overlap, equally all departed from drift angle β.Torque pulsation produces uses circular hole h
1～h
3Be powered with flexible base, board 40 and cover and block.
And Fig. 6～Fig. 8 shows rotor 100 is installed under the state on the fulcrum 30, except rotor plate 80 and the power supply position relation with circular ring magnet 50, stator magnetic sheet 10 and the hollow flatwise coil 42～45 of flexible base, board 40.That Fig. 6 shows is in fact impossible, the magnetic pole strength of circular ring magnet 50 directly over hollow flatwise coil 42～45, magnetic force boundary line L overlaps at detection reference line m
1Or cut-off rule m
2, m
3The top and stop state that stops.Torque pulsation produces uses circular hole h
1～h
3Peritreme F
1～F
3In the marginal portion F of pivot side
1～F
3Stretched out to the inside from interior all lateral margin 50a of the magnet 50 of annular some, but peritreme F
1～F
3Configured in one piece then be positioned at the inboard of the periphery lateral margin 50b of circular ring magnet 50.
Fig. 7 illustrates the actual stop position after circular ring magnet 50 has been avoided situation about stopping at the stop place, is circular hole h
1～h
3Produce torque pulsation and make magnetic force boundary line L and hole center C
1～C
3The state that overlaps.Under this state, as shown in Figure 9, the some P from magnetic pole (for example N utmost point) face
1～P
3In any magnetic line of force that comes out all pass through radius path and arrive peritreme F
1The shortest unique T
1～T
3, in stator magnetic sheet 10.Based on torque pulsation generation circular hole h
1～h
3The normal direction composition of the magnetic force boundary line L of the attractive magnetic force of interior each point is expected to positively to produce torque pulsation, and the zone that can not produce torque pulsation is almost eliminated, and can strengthen torque pulsation.
When circular ring magnet 50 stops, pole boundary line L from peritreme F
1～F
3A side tangent line S
1, S
2The state that overlaps arrives and the hole center C
1～C
3Overlap and stop, therefore, occupying in the hole between half of angle (α), circular ring magnet 50 positively rotates by torque pulsation.Therefore, owing to being incorporated in the hole, occupies between half of angle (α) drift angle β, so pole boundary line L can be at detection reference line m
1Or cut-off rule m
2, m
3On stop.
Peritreme F
1～F
3Be formed on the inboard of the periphery lateral margin 50b of circular ring magnet 50.Therefore, the magnetic line of force that comes out from the outer peripheral face of circular ring magnet 50 is also at peritreme F
1～F
3In the outside peritreme of despining central side concentrate, thereby can suppress flux and leak the deterioration of the torque performance in the time of can not causing energising.
Fig. 8 illustrates fan-shaped magnetic pole strength and covers torque pulsation generation circular hole h fully
1～h
3State.This state is the states of the big central authorities of the magnetic force of fan-shaped magnetic pole strength when overlapping with the center, hole, and torque pulsation becomes greatly, and torque pulsation produces and uses circular hole h
1～h
3Form greatly, the hole occupies angle [alpha] and sets greatly, therefore, bottom parts (the tangent line S of the stator magnetic sheet 10 that overlaps with fan-shaped magnetic pole strength
1, S
2With the scope in the formed angle γ of pole boundary line L) be limited at the narrow amplitude about 5 °, thereby torque pulsation greatly becomes big with respect to the very little anglec of rotation of rotor 100 is rapid near the place, can most advanced and sophisticated sharpening as maximal point, thereby can effectively get rid of the stop of rotor.Owing to angle [alpha] is occupied in the hole sets greatlyyer, therefore can effectively get rid of the stop of the circular ring magnet 50 of this position.Therefore, can positively avoid stop.At this, the relation of 2 γ＜β is set up.
The hole shape that torque pulsation produces with the hole is not limited to the circular hole shape, shown in Figure 10 (A), also can be about the symmetrical shape of centerline hole (symmetry axis) X of passing center C, by the straight line edge G as tangent line
1, G
2Inner arc edge D with same radius
1With outer arc edge D
2The oval edge that is formed by connecting can be by radial line edge (straight line edge) G as tangent line also shown in Figure 10 (B) like that perhaps
1', G
2' the inner arc edge d that radius is less
1The outer arc edge D bigger with radius
2The fan-shaped edge that is formed by connecting.
Claims (8)
1. flat brushless motor, described flat brushless motor is provided with stator magnetic sheet and rotor, and described stator magnetic sheet has carried a plurality of drive coils and the magnetic pole detecting element of the generation rotating magnetic field of arranging around fulcrum; With n is natural number, described rotor and described stator magnetic sheet be the layout circle annular magnet Face to face, this circular ring magnet alternately has the N utmost point and the S utmost point on the direction of rotation of the fan-shaped magnetic pole strength upper edge of 180 °/n of arc chord angle, described rotor rotation is supported on the described fulcrum freely; It is characterized in that,
In the stator magnetic sheet with described circular ring magnet facing to the zone in, symmetrical torque pulsation produces and uses hole, described centerline hole to be positioned at except the position of described magnetic pole detecting element and with the position the position that to be benchmark cut apart by 180 °/n equalization, this position about the centerline hole of the pivot that passes described rotor to be provided with flat shape; From described pivot and described torque pulsation produce with the tangent formed hole of a pair of tangent line of the peritreme in hole occupy angle (α) be 180 °/below the n, described peritreme is formed on the inboard of the outer peripheral edges of described circular ring magnet.
2. flat brushless motor as claimed in claim 1, it is characterized in that, according to the angle around described pivot, the position of described magnetic pole detecting element and produce apart from its nearest described torque pulsation is occupied below half of angle (α) for described hole with the formed drift angle of described centerline hole (β) in hole.
3. flat brushless motor as claimed in claim 1 or 2 is characterized in that, described peritreme comprises the inner arc edge of described pivot side and the outer arc edge of counter-rotating central side.
4. flat brushless motor as claimed in claim 3 is characterized in that, described peritreme is a circumferential rim.
5. flat brushless motor as claimed in claim 3 is characterized in that, described inner arc edge is being connected by the straight line edge with described outer arc edge.
6. as each the described flat brushless motor in the claim 1～5, it is characterized in that, described stator magnetic sheet is provided with the described torque pulsation of identical shaped n and produces and use the hole, and described n torque pulsation generation is positioned at each about the rotational symmetric position of 360 °/n of described pivot with the described centerline hole in hole.
7. flat brushless motor as claimed in claim 6 is characterized in that n=3.
8. as each the described flat brushless motor in the claim 1～7, it is characterized in that described rotor has eccentric hammer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007300632 | 2007-11-20 | ||
| JP2007300632A JP5368695B2 (en) | 2007-11-20 | 2007-11-20 | Flat brushless motor |
| JP2007-300632 | 2007-11-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101442248A true CN101442248A (en) | 2009-05-27 |
| CN101442248B CN101442248B (en) | 2012-11-21 |
Family
ID=40726542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101497092A Expired - Fee Related CN101442248B (en) | 2007-11-20 | 2008-09-19 | Flat brushless motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5368695B2 (en) |
| CN (1) | CN101442248B (en) |
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| CN102005854A (en) * | 2010-11-02 | 2011-04-06 | 瑞声声学科技(深圳)有限公司 | Vibration motor and assembling method thereof |
| US8432073B2 (en) | 2009-07-16 | 2013-04-30 | Silicon Touch Technology Inc. | Power generating device |
| CN104979942A (en) * | 2014-04-04 | 2015-10-14 | 扬百格斯希姆株式会社 | Brushless direct current vibrational motor |
| CN105576902A (en) * | 2016-03-07 | 2016-05-11 | 南京艾驰电子科技有限公司 | Flexible PG board of motor |
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| JP6609435B2 (en) | 2015-08-03 | 2019-11-20 | 日本電産コパル株式会社 | Vibration motor |
| JP6731205B2 (en) | 2015-08-03 | 2020-07-29 | 日本電産コパル株式会社 | Vibration motor |
| JP2017153315A (en) | 2016-02-26 | 2017-08-31 | 日本電産セイミツ株式会社 | Vibration motor |
| KR101707112B1 (en) * | 2016-07-19 | 2017-02-27 | 이상의 | Brushless Direct Current Vibrational Motor |
| US10862368B2 (en) | 2016-07-19 | 2020-12-08 | Sang-eui LEE | Brushless direct current vibration motor having cogging plates for optimized vibrations |
| JP7203372B2 (en) * | 2018-10-29 | 2023-01-13 | ピップ株式会社 | Rotating magnetic therapy device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1244867A (en) * | 1984-04-27 | 1988-11-15 | Sanyo Electric Co., Ltd. | Brushless motor |
| JPH0370447A (en) * | 1989-08-04 | 1991-03-26 | Shicoh Eng Co Ltd | Single-phase brushless vibrating motor |
| JP3537815B1 (en) * | 2003-07-04 | 2004-06-14 | 東京パーツ工業株式会社 | Axial air gap type brushless motor having the stator and the stator |
| CN100384066C (en) * | 2003-09-22 | 2008-04-23 | 建准电机工业股份有限公司 | Combined assembly of spindle motor |
| JP4524619B2 (en) * | 2004-12-10 | 2010-08-18 | ソニー株式会社 | Vibration generation motor |
| JP3125496U (en) * | 2005-07-13 | 2006-09-21 | 大星電機工業株式會社 | BLDC vibration motor |
-
2007
- 2007-11-20 JP JP2007300632A patent/JP5368695B2/en not_active Expired - Fee Related
-
2008
- 2008-09-19 CN CN2008101497092A patent/CN101442248B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8432073B2 (en) | 2009-07-16 | 2013-04-30 | Silicon Touch Technology Inc. | Power generating device |
| CN101997385A (en) * | 2009-08-17 | 2011-03-30 | 点晶科技股份有限公司 | Generating device |
| CN101997385B (en) * | 2009-08-17 | 2013-07-31 | 点晶科技股份有限公司 | Generating device |
| CN102005854A (en) * | 2010-11-02 | 2011-04-06 | 瑞声声学科技(深圳)有限公司 | Vibration motor and assembling method thereof |
| CN104979942A (en) * | 2014-04-04 | 2015-10-14 | 扬百格斯希姆株式会社 | Brushless direct current vibrational motor |
| CN104979942B (en) * | 2014-04-04 | 2018-02-16 | (株)Yjm游戏 | Direct-flow vibrating |
| CN105576902A (en) * | 2016-03-07 | 2016-05-11 | 南京艾驰电子科技有限公司 | Flexible PG board of motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009130969A (en) | 2009-06-11 |
| JP5368695B2 (en) | 2013-12-18 |
| CN101442248B (en) | 2012-11-21 |
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