CN106787333B

CN106787333B - Loop construction, coil module and brushless motor

Info

Publication number: CN106787333B
Application number: CN201510807799.XA
Authority: CN
Inventors: 麦胜恩; 庄坤富; 黄世民
Original assignee: Delta Optoelectronics Inc
Current assignee: Delta Optoelectronics Inc
Priority date: 2015-11-20
Filing date: 2015-11-20
Publication date: 2019-06-07
Anticipated expiration: 2035-11-20
Also published as: CN106787333A

Abstract

The present invention provides a kind of loop construction and brushless motor, and loop construction includes a first layer coil and a second layer coil.First layer coil is with the first coiling that multi-turn is sequentially connected and in hollow cup-shaped, wherein multiple first coilings are obliquely extended pitch of the laps on drag cup face, and each multiple first coilings are in a complete circle at least one turnover.The second coiling that there is the second layer coil multi-turn to be sequentially connected is on first layer coil, wherein multiple second coilings first around pitch of the laps is obliquely extended online, and each multiple second coilings are in a complete circle at least one turnover.Coil mechanism of the invention, because loop construction has lattice coil, lattice coil can be drawn close and be arranged together.Compared to single layer coil, loop construction integrally becomes more thick and solid, and the deformation that can bear biggish external impacts and each layer line circle is also smaller.

Description

Loop construction, coil module and brushless motor

Technical field

The present invention relates to a kind of motor and loop construction more particularly to a kind of brushless motors and its loop construction.

Background technique

Motor is common actuating assembly, can be divided into alternating current motor and d.c. motor, general direct current according to power supply mode Motor can be divided into brush motor and brushless motor again.

General direct-current brush motor includes stator, rotor and brush, and brush is usually the fixed bit that carbon brush is mounted on stator It sets, stator has permanent magnet, and rotor has armature and commutation contact, and armature is made of winding and iron core, winding It is connected to contact, when the contact on the brush and rotor on stator contacts, electric current can flow through winding and generate torque.

General DC Brushless Motor equally has rotor and stator, but its compared with aforementioned direct-current brush motor in structure There is no brush, and permanent magnet is located on rotor, winding is on stator.Coiled wire-wound coil on stator can be divided into two kinds of types Formula, the first pattern are single coil (single hollow coil), are composed of multiple single coil cladding insulating parts； Another pattern is hollow cup coil (hollow cup coil), is coiled into hollow cylindrical using copper wire, hollow cup coil is not It can coat and wind any insulating part.

However, the armature of direct-current brush motor can be worn away with brush because being in contact with each other, moreover, brush is as current transformation Device, to protect effective utilization, it is necessary to the dirt of periodic cleaning above it, therefore the application of direct-current brush motor is limited.In addition, Although the shortcomings that DC Brushless Motor does not have contact above-mentioned and wears away, because the hollow cup coil of stator is thin walled shell, knot Structure intensity is weaker, and therefore, hollow cup coil deformation when the motor is running will cause magnetic force suffered by rotor uneven, motor performance thus It is poor.

Summary of the invention

One object of the present invention is to provide a kind of stronger loop construction of lamps structure intensity and have this loop construction Brushless motor.

One object of the present invention is to provide a kind of less to account for volume but and still have the loop construction of better performance and have The brushless motor of this loop construction.

A kind of loop construction is suitable for a brushless motor comprising a first layer coil and a second layer coil.First Layer line circle is with the first coiling that multi-turn is sequentially connected and in hollow cup-shaped, wherein the first coiling is obliquely extended on drag cup face Pitch of the laps, each first coiling is in a complete circle at least one turnover.Second layer coil has second that multi-turn is sequentially connected Coiling is on first layer coil, wherein the second coiling is obliquely extended pitch of the laps in the first coiling, and each second coiling is complete one With at least one turnover in circle.

A kind of coil module is suitable for a brushless motor comprising a loop construction and a conductor structure.Loop construction Including a first layer coil and a second layer coil.First layer coil is with the first coiling that multi-turn is sequentially connected and in hollow Cup-shaped, wherein the first coiling is obliquely extended pitch of the laps on drag cup face, each first coiling has at least one in a complete circle Turnover.Second layer coil has the second coiling for being sequentially connected of multi-turn on first layer coil, wherein the second coiling first around Pitch of the laps is obliquely extended on line, each second coiling is in a complete circle at least one turnover.Conductor structure includes a circuit board And multiple conductive terminals, conductive terminal are set to the first coiling on circuit board and being separately connected part and partial second Coiling.

A kind of brushless motor includes a loop construction and a motor rotor.Loop construction include a first layer coil and One second layer coil.First layer coil is with the first coiling that multi-turn is sequentially connected and in hollow cup-shaped, wherein the first coiling exists Pitch of the laps is obliquely extended on drag cup face, each first coiling is in a complete circle at least one turnover.Second layer coil has The second coiling that multi-turn is sequentially connected is on first layer coil, wherein the second coiling is obliquely extended pitch of the laps in the first coiling, respectively Second coiling is in a complete circle at least one turnover.First layer coil and second layer coil encircling motor rotor.

In embodiment, the first coiling and the second coiling arrangement bringing together.

In embodiment, the first coiling is identical as included angle of second coiling in place of turnover.

In embodiment, in a complete circle, the first coiling is identical as the quantity of the turnover of the second coiling.

In embodiment, the second coiling corresponding on position is obliquely extended in same direction respectively for the first coiling.

In embodiment, the first coiling of caudal end and the second coiling of most head end are connected to each other.

In embodiment, first layer coil further includes the first outlet pair of N group, and the first outlet is to respectively having two leading-out terminals, and the It is divided into N the first winding of section, two outlets of correspondingly connected first outlet pair in the both ends of each section of the first winding in one layer line circle electrical property End.Second layer coil further includes the second outlet pair of N group, and the second outlet divides in second layer coil electrical property respectively having two leading-out terminals At N the second winding of section, two leading-out terminals of correspondingly connected second outlet pair in the both ends of each section of the second winding.Wherein, N is equal to brushless The driving number of phases of motor, for example, with three-phase drive for, N 3.

In embodiment, in a complete circle, the quantity of the turnover of the first coiling or the second coiling is brushless motor The half of number of poles.

In conclusion lattice coil can be drawn close and be arranged together because loop construction has lattice coil.Compared to single-layer wire Circle, loop construction integrally become more thick and solid, and the deformation that can bear biggish external impacts and each layer line circle is also smaller.It is another Aspect, lattice coil can generate stronger magnetic torque compared with single layer coil, but the space of required amplification is compared to existing single layer structure But many without increasing, therefore, lattice coil structure has both hydrodynamics and saves Space.

Furthermore loop construction can be used in the motor of three-phase drive, and three corresponding winding wire segment length are close, loop construction Do not allow to tend to have repeatedly line problem yet, it is therefore, high with the operation precision of this motor driven.

Detailed description of the invention

Figure 1A is the stereoscopic schematic diagram of a loop construction of an embodiment.

Figure 1B is an expanded view of the loop construction of Figure 1A.

Fig. 1 C is a phase configuration figure of the loop construction of Figure 1A.

Fig. 2A is the stereoscopic schematic diagram of a loop construction of an embodiment.

Fig. 2 B is an expanded view of the loop construction of Fig. 2A.

Fig. 2 C is a phase configuration figure of the loop construction of Fig. 2A.

Fig. 3 A is an exploded view of a coil module of an embodiment.

Fig. 3 B is a perspective view of the coil module of Fig. 3 A.

Fig. 3 C and Fig. 3 D is that the coil module of Fig. 3 A is coated a perspective view after molding.

Fig. 3 E is the side view diagram of the coil module of Fig. 3 C.

Fig. 4 A is a stereo amplification figure of the conductive terminal of the coil module of Fig. 3 A.

Fig. 4 B is a main view of the conductive terminal of Fig. 4 A.

Fig. 4 C to Fig. 4 F is the main view of the variation pattern of the conductive terminal of Fig. 4 A.

Fig. 5 is the stereoscopic schematic diagram of a motor of an embodiment.

[symbol description]

1: loop construction

11: first layer coil

111: the first coilings

112,113: turnover

114: outlet pair

12: second layer coil

121: the second coilings

122,123: turnover

124: outlet pair

2: coil module

21: circuit board

22: conductive terminal

221: sluice gate slot

222: main body

223: folding foot

224: folding foot

225: folding foot

226: pin

23: insulation external member

24: stator core

25: structure glue or plastics

3: brushless motor

31: upper cover

32: rotor

33: lower cover

L₁~L_n: the 1st circle the~the n-th circle coiling

Z: axial

R: radial

U1+, U1-, V1+, V1-, W1+, W1-: the leading-out terminal of the first winding

U2+, U2-, V2+, V2-, W2+, W2-: the leading-out terminal of the second winding

Specific embodiment

Hereinafter with reference to relevant drawings, illustrate the loop construction, coil module and motor according to present pre-ferred embodiments, In identical component will be illustrated with identical reference marks.

Figure 1A is the stereoscopic schematic diagram of a loop construction 1 of an embodiment.Figure 1B is an expansion of the loop construction 1 of Figure 1A Figure.Fig. 1 C is a phase configuration figure of the loop construction 1 of Figure 1A.

As shown in Figure 1A and Figure 1B, loop construction 1 includes a first layer coil 11 and a second layer coil 12.First layer With the first coiling 111 that multi-turn is sequentially connected and in hollow cup-shaped, the first coiling 111 is oblique on drag cup face to prolong coil 11 Stretch pitch of the laps.12 one end of second layer coil connects one end of first layer coil 11, and the second coiling 121 being sequentially connected with multi-turn On first layer coil 11, and the second coiling 121 is obliquely extended pitch of the laps in the first coiling 111.In the present embodiment, second around Line 121 is obliquely extended pitch of the laps on 111 outside of the first coiling.

Drag cup is about open column shape, and central axis is denoted as axial Z, if overlooking diameter towards loop construction 1 above axial Z To plane where r, the coiling of loop construction 1 institute around a circle among (diagram is in the counterclockwise direction), coiling extends at it Path on extend without radially r, but extend towards tangential direction.That is, coiling is the combination towards tangent line and axial direction Z Square Xiang Yanshen.

First coiling 111 has at least one turnover 112 in a complete circle, and the second coiling 121 is in a complete circle With at least one turnover 122, turning point is located at the highest or lowest part of drag cup setting, and turnover can say to be coiling in axial Z Reversed edge is stretched on component.It is that coiling edge since starting point is stretched that a complete circle, which can be said, is returned to by starting point around a circle.In this reality It applies in example, the first coiling 111 has a turnover 112 in its complete circle, and the second coiling 121 is in its complete circle With a turnover 122.

If being spread out from Figure 1A by first layer coil 11 along the tangential direction for being orthogonal to axial Z, the result spread out such as Figure 1B institute Show.First coiling 111 has N circle, and each circle coiling is sequentially denoted as L respectively₁~L_N, coiling L₁~L_NSequential, i.e., i-th circle around The head end of the tail end connection i+1 circle coiling of line, 0 < i < N, wherein i is natural number.Second coiling 121 and the first coiling 111 It is same or like, also there are N circle, difference circle coiling L₁~L_NThe tail end of sequential, the i-th circle coiling connects the coiling of i+1 circle Head end, 0 < i < N, wherein i be natural number.

First layer coil 11 can be made with usage space Ha Bashi coiling (FaulHaber winding) as drag cup Loop construction.Hollow cup coil appearance is in oblique cabling, and is combined by multiple triangles being distributed on coil cylindrical outer surface It forms, in the present embodiment, three triangles are presented in the lines that 11 coil of first layer coil is constituted on drag cup face.Around complete Line is not truncated and continues around second layer coil 12 after one layer line circle 11, that is to say, that when production the first coiling of caudal end with most Second coiling of head end is connected to each other.Second layer coil 12 can also be cased with usage space Ha Bashi coiling to be made for inside The hollow cup coil of first layer coil 11, this two layer lines circle make of identical winding.Therefore, second layer coil 12 and first layer Coil 11 is substantially similar, and second layer hollow cup coil appearance is also and to be distributed in coil cylinder appearance by multiple in oblique cabling Triangle on face is composed.In the present embodiment, the lines that second layer coil 12 is constituted on drag cup face is also to present Three triangles.

The number of triangles of one layer of coiling is related with turnover quantity, and relationship may be expressed as: number of triangles=turnover number Measure x2+1.

In a complete circle, the quantity of the turnover of the first coiling 111 is the half of the number of poles of brushless motor, or that turns The quantity of folding is equal to the logarithm of the magnetic pole of brushless motor.In the present embodiment, each first coiling 111 is in its complete circle With a turnover 112, that is, the quantity transferred is 1, and applicable brushless motor should then have a pair of of magnetic pole (that is, 2 magnetic Pole).

Likewise, the quantity of the turnover of the second coiling 121 is the half of the number of poles of brushless motor in a complete circle, It can also say that the quantity of turnover is equal to the logarithm of the magnetic pole of brushless motor.In the present embodiment, each second coiling 121 is complete at it There is a turnover 122, that is, the quantity transferred is 1 in one circle.

The same circle coiling of different layers at same orientation angle, position corresponds to each other on two layers the first coiling 111 and second around Line 121 is obliquely extended in same direction and in the turnover that mutually exists together.First coiling 111 and the arrangement bringing together of the second coiling 121.The One coiling 111 is with the second coiling 121 identical in the included angle of its corresponding 112,122 place of turnover respectively.Complete one In circle, the first coiling 111 is identical as the quantity of turnover 112,122 of the second coiling 121.

As shown in Figure 1 C, coil can be divided into multistage winding in response to needed for motor phase number, and in response to equipped with multiple outlets It is right.For example, first layer coil 11 further includes the first outlet of N group to 114, first outlets 114 to respectively having two leading-out terminals, first It is divided into N the first winding of section, two outlets of correspondingly connected first outlet pair in the both ends of each section of the first winding in 11 electrical property of layer line circle End.Second layer coil 12 further includes that the second outlet of N group respectively has two leading-out terminals, second layer coil to 124 to 124, second outlets Be divided into N the second winding of section in 12 electrical property, correspondingly connected second outlet in the both ends of each section of the second winding to 124 two leading-out terminals. Wherein, N be equal to brushless motor driving number of phases, such as with three-phase drive for, N 3, three group of first outlet to 114 go out Line end is denoted as (U1+, U1-), (V1+, V1-) and (W1+, W1-), and three group of second outlet is denoted as 124 leading-out terminal (U2+, U2-), (V2+, V2-) and (W2+, W2-).

In addition, the outlet of different layers is on or near common-azimuth to 114,124 position.For example, the first winding Position is other in the leading-out terminal (U2+, U2-) of the second winding respectively for leading-out terminal (U1+, U1-), the leading-out terminal (V1+, V1-) of the first winding Position is other in the leading-out terminal (V2+, V2-) of the second winding respectively, the leading-out terminal position (W1+, W1-) the going out in the second winding of the first winding Line end (W2+, W2-) is other.

Azimuthal angle of two leading-out terminals of same winding is related with the quantity of turnover, that is to say, that with motor rotor Number of magnetic poles it is related.Azimuthal angle of two leading-out terminals of same winding can be indicated such as following formula, wherein θ is azimuthal Angle, T are the quantity of turnover, and M is the driving number of phases of motor.

θ=360 °/(T × M)

In the present embodiment, T is equal to 1, M and is equal to 3, then θ is equal to 120 degree.

The coiling of same layer coil is largely that from coil to coil continuously connects, i.e., the coiling continuously to connect is to electrically conduct each other , it does not adjoin one another in outlet to different windings are located only, each winding is respective independence.But the coiling of different windings is adjacent Place's still continuous arrangement, does not connect in electrical property only each other.In addition, though among first layer coil and second layer coil, First coiling of caudal end and the second coiling of most head end are that can be connected to each other, but in order to configure winding, this is not when production The both ends of same layer, which can still be truncated, keeps corresponding winding independent of one another.

Fig. 2A is the stereoscopic schematic diagram of a loop construction 1a of an embodiment.Fig. 2 B is an exhibition of the loop construction 1a of Fig. 2A Open figure.Fig. 2 C is a phase configuration figure of the loop construction 1a of Fig. 2A.

As shown in Fig. 2A to Fig. 2 C, with the difference of Figure 1A to Fig. 1 C first is that, turnover quantity on each layer line circle It is more.

In the present embodiment, lattice coil is also usage space Ha Bashi coiling to make.First layer coil 11 is also hollow Cup coil, second layer coil 12 are the hollow cup coils that inside is cased with first layer coil 11.First layer coil 11 is in drag cup face Five triangles are presented in the lines of upper composition, and the lines that second layer coil 12 is constituted on drag cup face is also that five triangles are presented Shape.Line is not truncated and continues around second layer coil 12 after complete first layer coil 11, that is to say, that the first of caudal end when production Second coiling 121 of coiling 111 and most head end is connected to each other.Loop construction 1 compared to Figure 1A to Fig. 1 C, the line of the present embodiment Coil structures 1a is because same layer is more with broken number in circle, therefore its coil utilization rate is higher.

For example, loop construction 1a can be used for the brushless motor that number of poles is 4, that is to say, that the rotor of brushless motor has There are 2 pairs of magnetic poles.The first layer coil 11 and second layer coil 12 of loop construction 1a encloses interior turnover number quantity complete one 2.In addition, motor is with three-phase drive.

θ=360 °/(T × M)

In the present embodiment, T is equal to 2, M and is equal to 3, then θ is equal to 60 degree.

In addition, if the first layer coil 11 and second layer coil 12 of loop construction the 1a difference in its complete circle The quantity of turnover 112,122 is more than 1, that is to say, that the quantity of turnover 112 or turnover 122 is greater than or equal to 2, the outlet of same layer Position to 114,124 is sequential.In addition, the outlet of different layers is sequential to 114,124 position.For example, following Clockwise or counterclockwise, the leading-out terminal of the first winding is first configured to the leading-out terminal for being reconfigured the second winding, the example of Fig. 2 C Son is leading-out terminal (U1+, U1-), leading-out terminal (V1+, V1-), leading-out terminal (W1+, W1-), leading-out terminal (U2+, U2-), leading-out terminal (V2+, V2-) is sequentially configured with leading-out terminal (W2+, W2-).

Fig. 3 A is an exploded view of a coil module 2 of an embodiment.Fig. 3 B is a solid of the coil module 2 of Fig. 3 A Figure.

As shown in Figure 3A, coil module 2 includes a loop construction 1b and a conductor structure.Conductor structure includes a circuit Plate 21, multiple conductive terminals 22, insulation external member 23 and stator core 24.The first coiling 111 and second in loop construction 1b Coiling 121 is enameled wire, and conductive terminal 22 is conductor.Stator core 24 is hollow cylinder, and inside accommodates loop construction 1b.It is fixed Sub- iron core 24 is equipped with insulation external member 23 along one end of cylinder axial direction, and circuit board 21 is located in insulation external member 23.Circuit board 21 and fixed Sub- iron core 24 is located at the two sides of insulation external member 23, and insulation external member 23 separates both this to prevent short circuit.In addition, conductor structure can also It does not include stator core, motor is then non-iron core motor in this embodiment.

The external member 23 that insulate and circuit board 21 are annular, the outlet of these conductive terminals 22 and each layer line circle of loop construction 1b Pair leading-out terminal pairing be arranged on circuit board 21.The quantity of conductive terminal 22 according to brushless motor driving number of phases and coil Depending on the coil number of plies of structure 1b.Such as it may be expressed as: quantity=2 × driving number of phases × coil number of plies of conductive terminal.It leads Electric terminal 22 is set on circuit board 21 and is separately connected the first coiling 111 and partial of the part of loop construction 1b Two coilings 121.

In addition, if the first layer coil 11 and second layer coil 12 of loop construction the 1b difference in its complete circle The quantity of turnover 112,122 is more than 1, that is to say, that the quantity of turnover 112 or turnover 122 is more than or equal to 2, the outlet of different layers Position to 114,124 is sequential, and the outlet for different layers is also in circuit to the conductive terminal 22 of 114,124 connections Sequential on plate 21.

Fig. 4 A is a stereo amplification figure of the conductive terminal of the coil module of Fig. 3 A.Fig. 4 B is the one of the conductive terminal of Fig. 4 A Main view.Fig. 4 C to Fig. 4 F is the main view of the variation pattern of the conductive terminal of Fig. 4 A.

As shown in Figure 4 A and 4 B shown in FIG., conductive terminal 22 includes that a sluice gate slot 221 and a main body 222, sluice gate slot 221 are located at The most narrow place of the side of main body 222, sluice gate slot 221 is narrower than conducting wire in the diameter of leading-out terminal, is preferably narrower than conducting wire in leading-out terminal The diameter of enamel-cover layer is deducted, to remove the enamel-cover layer of the leading-out terminal of insertion.The long and narrow place of sluice gate slot 221 is also narrower than the straight of leading-out terminal Diameter, with fixedly embedded leading-out terminal in sluice gate slot 221.

Preferably, the relationship between sluice gate slot 221 and folded conducting wire can be indicated such as following formula, wherein P is sluice gate slot 221 The width at long and narrow place, O are the width at the most narrow place of sluice gate slot 221, and L is the length at the long and narrow place of sluice gate slot 221, and d is diameter of wire.

O=(0.8~0.85) × d

P=(0.92~0.97) × d

L=(1.5~2.0) × d

Conductive terminal 22 includes folding foot 223,224, and folding foot 223,224 connects main body 222 and from main body 222 respectively towards two A direction bending, folding foot 223,224 can be fixed on circuit board 221.

In addition, the shape of conductive terminal is alterable as shown in Fig. 4 C to Fig. 4 F.In figure 4 c, the top of terminal becomes more It is round and smooth.In fig. 4d, the quantity for rolling over foot 225 becomes one.In Fig. 4 E, conductive terminal 22 includes a pin 226, pin 226 It connects main body 222 and extends from main body 222, pin 226 can be directly inserted on circuit board 21, be conducive to ease of assembly.In Fig. 4 F In, conductive terminal 22 has folding foot 223,224 as shown in Figure 4 B, and there are also pins 226 as shown in Figure 4 E.

For example, when the conducting wire of leading-out terminal is inserted into sluice gate slot 221, relatively narrow sluice gate slot 221 can leading leading-out terminal Enamel-cover layer on the outside of line is removed or is struck off together.Therefore, leading-out terminal is other than being capable of fixing in sluice gate slot 221, leading-out terminal institute Relevant winding can also be electrically connected conductive terminal 22.Therefore, the conducting wire of leading-out terminal can be directly embedded in conductive terminal 22 Sluice gate slot 221 simultaneously directly forms conducting, and is not necessarily to any additional welding procedure.

Fig. 3 C and Fig. 3 D is that the coil module of Fig. 3 A is coated a perspective view after molding.Fig. 3 E is the coil mould of Fig. 3 C The side view diagram of block.As shown in Fig. 3 C to Fig. 3 E, coil module 2 after connection can be with reperfusion structure glue or plastics 25 to project Mode is overmolded, and the enhancing of its structure and conducting wire and conductive terminal junction are more firm after molding, motor assembling and operating Quality is not only promoted, but also motor production group vertical working hour can also be saved.That is, stator coil, conductive terminal and circuit board Semi-finished product can be overmolded with structure glue or plastics 25 again, waterproof degree may conform to IP degree of protection.In addition, stator module Other assemblies such as iron core stator, insulation external member can also coat and be encapsulated in this stator body.

In addition, conductive terminal is able to cooperate the wires design of circuit board, thus the design requirement of different connections can be met, such as Therefore delta-connection or Y connection, can save working hour and promote the conducting matter after connection without complicated string (simultaneously) tie Amount.

Fig. 5 is the stereoscopic schematic diagram of a motor 3 of an embodiment.As shown in figure 5, a brushless motor 3 includes a conducting wire knot Structure 2, a shell and a motor rotor 33.The loop construction 1b of shell covered conductor structure 2.Due to the phase in conductor structure 2 It closes component and explanation can refer to foregoing teachings, so repeating no more.

For example, shell includes a upper cover 31 and a lower cover 32, and upper cover 31 is combined with lower cover 32 and coated wire knot The outside of structure 2.Within the space that conductor structure 2 is set to upper cover 31 and lower cover 32 defines.Upper cover 31 and lower cover 32 have opening The shaft of rotor 33 is allowed to wear.24 surrounding rotor 33 of stator core of conductor structure 2, and be set to upper cover 31 and lower cover 32 it It is interior.The first layer coil 11 and second layer coil 12 of loop construction 1b is around motor rotor 33.

In the present embodiment, motor 3 is brush DC internal rotor non iron-core drag cup motor.On the other hand, conductor structure 2 Also it may not include stator core 24, motor 3 is non-iron core motor.

In conclusion lattice coil energy close proximity is arranged together because loop construction has lattice coil.Compared to list Layer line circle, loop construction integrally become more thick and solid, the deformation after capable of bearing biggish external impacts and each layer coil-winding Also smaller.On the other hand, lattice coil can generate stronger magnetic torque compared with single layer coil, but the space of required amplification is without phase Many to increasing, therefore, lattice coil structure has both hydrodynamics and saves space.

The foregoing is merely illustrative, rather than limitation of the present invention.It is any without departing from spirit and scope of the invention, and The equivalent modifications or change carried out to it, are intended to be limited solely by the attached claims.

Claims

1. a kind of loop construction is suitable for a brushless motor, comprising:

One first layer coil, with the first coiling that multi-turn is sequentially connected in hollow cup-shaped, wherein multiple first coilings Pitch of the laps is obliquely extended on drag cup face, multiple first coilings are in a complete circle at least one turnover；And

One second layer coil, the second coiling that there is multi-turn to be sequentially connected is on the first layer coil, wherein multiple described second Coiling is obliquely extended pitch of the laps in multiple first coilings, and each multiple second coilings have at least in a complete circle One turnover；

Wherein, after the complete first layer coil, which, which is not truncated, continues around the second layer coil as second coiling.

2. loop construction as described in claim 1, wherein multiple first coilings are leaned on each other with multiple second coilings Hold together arrangement.

3. loop construction as described in claim 1, wherein multiple first coilings are with multiple second coilings multiple Included angle in place of the turnover is identical.

4. loop construction as described in claim 1, wherein in a complete circle, first coiling and second coiling Multiple turnovers quantity it is identical.

5. loop construction as described in claim 1, wherein multiple first coilings multiple institutes corresponding on position respectively The second coiling is stated to be obliquely extended in same direction.

6. loop construction as described in claim 1, wherein

The first layer coil further includes the first outlet pair of N group, and multiple first outlets are to respectively with two leading-out terminals, the first layer It is divided into N the first winding of section, the institute of correspondingly connected multiple first outlets pair in the both ends of each section of the first winding in coil electrical property State two leading-out terminals；

The second layer coil further includes the second outlet pair of N group, and multiple second outlets are to respectively with two leading-out terminals, the second layer It is divided into N the second winding of section, the institute of correspondingly connected multiple second outlets pair in the both ends of each section of the second winding in coil electrical property Two leading-out terminals are stated,

Wherein, N is equal to the driving number of phases of the brushless motor.

7. loop construction as described in claim 1, wherein the quantity of at least one turnover is the nothing in a complete circle The half of the number of poles of brush motor.

8. loop construction as described in claim 1, wherein the first coiling of caudal end connects each other with the second coiling of most head end It connects.

9. a kind of coil module is suitable for a brushless motor, comprising:

One loop construction, comprising:

One first layer coil, with the first coiling that multi-turn is sequentially connected in hollow cup-shaped, wherein multiple first coilings Pitch of the laps is obliquely extended on drag cup face, each multiple first coilings are in a complete circle at least one turnover；And

One second layer coil, the second coiling that there is multi-turn to be sequentially connected is on the first layer coil, wherein multiple described second Coiling is obliquely extended pitch of the laps in multiple first coilings, and each multiple second coilings have at least in a complete circle One turnover, wherein after the complete first layer coil, which, which is not truncated, continues around second layer line as second coiling Circle；And

One conductor structure, comprising:

One circuit board；And

Multiple conductive terminals are set on the circuit board, and are separately connected multiple first coilings of part and partial Multiple second coilings.

10. a kind of brushless motor, comprising:

One loop construction, comprising:

One motor rotor, wherein the first layer coil and described second layer coil encircling motor rotor.