CN204992802U - Single -Phase permanent -Magnet motor and stator core thereof - Google Patents

Abstract

The utility model discloses a single -Phase permanent -Magnet motor and stator core thereof, single -Phase permanent -Magnet motor include stator core, twine winding and the rotatory permanent magnet rotor of stator relatively on stator core, stator core includes tip and two arms that are stretched out by the tip, two arm intervals set up, and each arm includes with end connection's linking arm and formed at the utmost point claw of the end of linking arm, it holds the rotor to form the space in the claw of the two poles of the earth, utmost point claw encircles the space forms the polar arc face, stator core's polar arc face encircles the rotor and forms the air gap with the rotor, polar arc face indent is formed with and starts the groove, start the trench on the center pin of utmost point claw, thereby the interval forms two notches between the claw of the two poles of the earth on the polar arc face, line between two notches with the center pin quadrature of utmost point claw for can the twocouese quick start when motor starts once more.

Description

Electric machine and stator core thereof

Technical field

The utility model relates to monophase machine, particularly relates to the stator core of electric machine.

Background technology

Electric machine is made up of stator core, stator winding and p-m rotor usually.Wherein, stator core is generally U-shaped, comprises two spaced polar arms.The end of each polar arm forms a pole pawl, the inwall concave shaped poling cambered surface of each pole pawl.Namely described winding is wound on polar arm, and described rotor is then arranged between the pawl of the two poles of the earth, relative with polar arc face, forms roughly uniform air gap between the two.

For ease of the startup of rotor, on polar arc face, indent is formed with startup groove, described startup groove departs from the central shaft of pole pawl, rotor its pole axis after power-off stops operating so is made to deflect certain angle relative to the central shaft of pole pawl, formed and start angle, coordinate corresponding start-up circuit, make rotor upper be once energized time can start smoothly with specific direction.But above-mentioned electric machine can not two-way startup, and its application can be subject to a definite limitation.

Utility model content

In view of this, the utility model provides a kind of electric machine and stator core thereof of energy two-way startup.

On the one hand, the utility model provides a kind of stator core, two arms comprising end and stretched out by end, described two arm intervals are arranged, each arm comprises the pole pawl of the linking arm be connected with end and the end being formed at linking arm, space is formed for holding rotor in the pawl of described the two poles of the earth, described pole dog collar forms polar arc face around described space, described polar arc face indent is formed with startup groove, described startup slot is on the central shaft of pole pawl, interval between the pawl of described the two poles of the earth thus form two notches on polar arc face, the orthogonality of center shaft of the line between described two notches and described pole pawl.

Again on the one hand, the utility model provides a kind of electric machine, comprise said stator magnetic core, be wound in winding on stator core and can the p-m rotor that rotates of relative stator, described rotor is arranged at the space in the pawl of the two poles of the earth, and the polar arc face surrounding rotor of described stator core also forms air gap with rotor.

Compared to prior art, the polar arc face indent of the stator core of the utility model motor is formed and starts groove, and described startup slot, on the central shaft of pole pawl, can start by twocouese when motor is started again fast.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model electric machine one embodiment.

Fig. 2 is the explosive view of Fig. 1.

Fig. 3 is the vertical view of Fig. 1.

Embodiment

Below in conjunction with accompanying drawing, by describing in detail embodiment of the present utility model, will make the technical solution of the utility model and other beneficial effects apparent.Be appreciated that accompanying drawing only provides reference and explanation use, be not used for being limited the utility model.The size shown in accompanying drawing is only for ease of clear description, and does not limit proportionate relationship.

Figure 1 shows that the structural representation of the electric machine according to the utility model one embodiment, the p-m rotor 12 that described motor comprises stator core 10, is wound in the winding (not shown) on magnetic core 10 and is arranged at rotationally in magnetic core 10.In diagram, be structure and the feature of the stator core 10 of clear display the utility model motor, the subelement of motor, as not shown in winding, the circuit of controlled winding electric current, the shell of motor etc., it can be the corresponding construction in existing electric machine.Can fixedly wear a rotating shaft in described p-m rotor 12, for being connected with load, during winding energising, magnetic core 10 is polarized, promotes p-m rotor 12 rotate with the magnetic fields of p-m rotor 12, and then drives loaded work piece.

Described magnetic core 10 is by soft magnetic material, and such as ferromagnetic material etc. are made.Preferably, as shown in Figure 2, in the present embodiment, described magnetic core 10 is U-shaped magnetic core, comprises end 14 and by the vertical outwardly directed polar arm 16 in described end 14.In the present embodiment, described polar arm 16 by two independently arm 18 form.The spaced and parallel setting of described two arm 18, forms space between the two, facilitates the winding of winding.In the present embodiment, be connected by the mode be mechanically connected after described end 14 is shaping with two arms 18 difference of polar arm 16, so can be connected with end 14 again after the complete winding of winding on arm 18 respectively, make the winding of winding more convenient, quick.Preferably, described end 14 and two arms 18, respectively by some thin slices, as stackingly in silicon steel sheet etc. to form.Only schematically show in diagram end 14, arm 18 stacking shaping after monnolithic case, do not show the concrete structure of multiple-level stack.

For convenience of the assembling of thin slice, on each thin slice, can form pilot hole 20 all accordingly, pilot hole 20 described in the present embodiment be recessed blind hole, and male-female engagement between the blind hole that thin slice is adjacent when stacking buckle connect, and form end 14 and arm 18.In the present embodiment, described end 14 is formed with draw-in groove 22 respectively in the position near its two side ends, and described two arms 18 are outwardly on its end face towards end 14 respectively is accordingly formed with fixture block 24.The fixture block 24 of described two arms 18 snaps in a corresponding draw-in groove 22 vertically respectively, is connected by arm 18 with end 14, forms magnetic core 10.Preferably, described draw-in groove 22 and fixture block 24 form dove-tail form buckle and are connected, and avoid connecting rear disengagement.In other embodiments, described draw-in groove 22 also can be formed on arm 18, and correspondingly described fixture block 24 is formed on end 14, is similarly connected to form described magnetic core 10 by snap.

Two arm 18 structures of described polar arm 16 are substantially identical, and each arm 18, all in strip, comprises the pole pawl 28 of the linking arm 26 be connected with end 14 and the end being formed at linking arm 26.Linking arm 26 parallel interval of described two arms 18 is arranged, midfeather one fixed width; The two poles of the earth pawl 28 in opposite directions and interval arrange, its internal face is in opposite directions recessed to form polar arc face 30, and described polar arc face 30 defines one for accommodating the receiving space 32 of rotor 12.Described receiving space 32 roughly in cylindric, is coaxially arranged with rotor 12.The diameter of described receiving space 32 is slightly larger than the diameter of rotor 12, thus the outer surface of polar arc face 30 and rotor 12 distance that interval one is little diametrically, form roughly uniform air gap.

In the present embodiment, each pole pawl 28 is roughly c-shaped, and the both sides of its circumference are horizontal relative to linking arm 26 protruding, forms pole tip 34 respectively.Described pole tip 34 is almost parallel relative to end 14, corresponding interval between two linking arms 26.Preferably, the length that described pole tip 34 stretches out is less than the half of the width at the interval between two linking arms 26.Arm 18 like this is after assembled, and the pole tip 34 of the two poles of the earth pawl 30 correspondence arranges in opposite directions and forms a little notch 36 between, and polar arc face 30 is arranged in disconnecting in the circumferential.Preferably, the position of described notch 36 is just to the central authorities at the interval of two linking arms 26.Preferably, the width that described polar arc face 30 disconnects in the circumferential, the i.e. width of teeth groove 36, be less than 3 times of the width of air gap between polar arc face 30 and rotor 12.More preferably, the width of described notch 36 is less than the twice of the width of the air gap between polar arc face 30 and rotor 12, while avoiding leakage field, reduce cogging torque as far as possible as far as possible, ensures the efficiency of motor and reduces its noise.

Please refer to Fig. 3, described polar arc face 30 indent is formed with two starting grooves 38, and described two start groove 38 lays respectively on the two poles of the earth pawl 28.Each starts groove 38 and is positioned at corresponding pole pawl 28 middle position in the circumferential.Start groove 38 structure axisymmetricly itself, its symmetry axis overlaps with the central shaft X of pole pawl 28, and the degree of depth starting groove 38 is increased gradually by two side direction central authorities of its circumference, at corresponding central shaft X position place, starts groove 38 and has the maximum degree of depth.Start groove 38 because polar arc face 30 indent is formed with, between startup groove 38 position magnetic core 10 and rotor 12, form non-uniform gap, and at the central shaft X position place starting groove 38 corresponding pole pawl 28, there is maximum air gap.Therefore, polar arc face alleged by the utility model 30 and the outer surface of rotor 12 form roughly uniform air gap diametrically and refer to and form air gap substantially uniformly except the part starting groove 38.

In the present embodiment, startup groove 38 is arranged on the central shaft X of pole pawl 28, and form maximum air gap at corresponding central shaft X position place, when motor is when power-off is static, the pole axis of rotor 12 overlaps with the central shaft X of magnetic core 10, the magnetic pole of rotor 12 is just to the pole tip 34 of pole pawl 28, the startup angle of formation like this 90 degree, when motor starts again, rotor 12 can rotate clockwise or counterclockwise, that is motor can two-way quick startup, is specially adapted to the occasion do not required rotation direction.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.

Claims (7)

1. a stator core, two arms comprising end and stretched out by end, described two arm intervals are arranged, each arm comprises the pole pawl of the linking arm be connected with end and the end being formed at linking arm, space is formed for holding rotor in the pawl of described the two poles of the earth, described pole dog collar forms polar arc face around described space, it is characterized in that, described polar arc face indent is formed with startup groove, described startup slot is on the central shaft of pole pawl, interval between the pawl of described the two poles of the earth thus form two notches on polar arc face, the orthogonality of center shaft of the line between described two notches and described pole pawl.

2. stator core as claimed in claim 1, is characterized in that, the central shaft of described startup groove antipode pawl is symmetrical.

3. stator core as claimed in claim 1, it is characterized in that, the degree of depth of described startup groove is increased gradually by its circumferential two side direction central authorities, has depth capacity at the center axial position of corresponding pole pawl.

4. stator core as claimed in claim 1, is characterized in that, the central shaft structure axisymmetricly of described polar arc face antipode pawl.

5. stator core as claimed in claim 1, it is characterized in that, the circumferential both sides of described pole pawl are protruding is formed with pole tip, interval between the pole tip that the two poles of the earth pawl is corresponding thus form described notch, and the width of described notch is less than the width at interval between linking arm.

6. the stator core as described in any one of claim 1-5, it is characterized in that, described end and arm are connected by the stacking also machinery that forms of some thin slices respectively, described arm and end one of them be formed with draw-in groove, wherein another is formed with fixture block, and described fixture block is arranged in respectively in corresponding draw-in groove and is connected with end by arm.

7. an electric machine, comprise stator core, be wound in winding on stator core and can the p-m rotor that rotates of relative stator, it is characterized in that, described stator core is the stator core described in any one of claim 1-6, described rotor is arranged at the space in the pawl of the two poles of the earth, and the polar arc face surrounding rotor of described stator core also forms air gap with rotor.