CN2178402Y

CN2178402Y - Electric motor structure for fan

Info

Publication number: CN2178402Y
Application number: CN 93247580
Authority: CN
Inventors: 饶振奇
Original assignee: Yuanli Motor Co ltd
Current assignee: Yuanli Motor Co ltd
Priority date: 1993-12-11
Filing date: 1993-12-11
Publication date: 1994-09-28
Anticipated expiration: 2003-12-11

Abstract

The utility model relates to an electric motor structure for fan, which is characterized in that a vertical ring surface at both ends of the lower silicon steel sheet is symmetrically provided with a ditch. The ring surface is divided into a big and a small ring surface by the ditch, after the top and bottom of the silicon steel sheet are across bonded, the magnetic force center is formed a preconcerted oblique intersection angle. The intersection angle is matched with the chute structure with a plurality of the tracks which is arranged on the rubber magnet which is arranged in the rotor. The utility model can acquire the advantages of easy starting, low starting current and high rotational efficiency.

Description

Electric motor structure for fan

The utility model relates to a kind of fan motor, particularly a kind of radiator fan DC motor structure.

Fan motor in the past shown in Fig. 1 grade, comprises rotor 1, ferro-gum 2, central shaft tube 3, goes up assemblies such as silicon steel sheet 410, insulating trip 510, coil 6, insulating trip 520, time silicon steel sheet 420, circuit board 7, shell block 8 as described later; The central authorities of rotor 1 are provided with a mandrel 110, the mandrel periphery forms a fit chamber 120, on the ring wall 130 of fit chamber 120 around cementation one ferro-gum 2, and fit chamber 120 is on to be cover cap aforementioned, following

silicon steel sheet

410 and 420,

insulating trip

510 and 520, coil 6, establish spacing ring in central shaft tube 3 tops, the center is provided with an axis hole, make it penetrate the aforementioned silicon steel sheet 410 of going up in regular turn, insulating trip 510, coil 6, insulating trip 520, following silicon steel sheet 420, circuit board 7, be integral fixing behind shell block 8 members such as grade, make, following silicon steel sheet 410,420 intersect up and down after fixing be ten shape, and pass the axis hole and the shell block 8 of central shaft tube 3 again with the mandrel 110 of rotor 1, by shell block 8 bottoms mandrel 110 is fixed with C type clasp 9.As shown in Figure 2, collude columnar structure though on the chow ring of aforementioned upper and lower

silicon steel sheet

410 and 420, be provided with arc, can solve the problem of avoiding the dead point, as shown in Figure 3, when only it turns round, the flux 18 that coil flux produces is partly constructed and is lost in the air via upper and lower

silicon steel sheet

410 and 420 hollow out, causes rotational efficienty low.

As shown in Figure 2, ferro-gum 2 and upper and lower silicon steel sheet 410,420 mutual magnetisms are attracted the magnetic force center of (N, S polar attraction), design is at perpendicular cross mid point, when causing fan motor to rotate stopping, upper and lower silicon steel sheet 410 with 420 and ferro-gum 2 between the hysteresis of natural birth magnetisation attraction dwell point (being the dead point); Again as shown in Figure 3, add that upper and lower silicon steel sheet 410,420 and the ferro-gum 2 mutual fluxs that form partly are all shapes of ring 18 and are lost in the air, inefficient shortcoming undoubtedly also will rotate.

Main purpose of the present utility model is to provide a kind of and eliminates starting moment magnetic attachment dead point, can reduce starting current and improve the fan motor structure of the practicality of rotational efficienty.

The principal character of the utility model structure is: do not become 90 degree to place to constitute its magnetic force central point of skew by upper and lower silicon steel sheet is intersected, and all upper and lower silicon steel sheet chow ring symmetries are bent to form anchor ring, go to upper and lower the covering thread round, and corresponding skewed slot is set on the ferro-gum that matches, make the aerial loss of its magnetic line of force reach minimum, no magnetic attachment dead point, starting and the high characteristics of rotational efficienty easily.

Fan motor structure of the present utility model according to above-mentioned purpose, mainly be to form to make, following silicon steel sheet does not become the structure of the involutory coating coil of 90 degree intersections, and on, the anchor ring cross coupled that following silicon steel sheet chow ring symmetry is bending 90 degree coats after the coil, in its magnetic force, be formed centrally the inclination angle of cut of being scheduled to, and on the hinge of the rubber in the being located at rotor magnet multiple tracks skewed slot is set, and see through last, each anchor ring increase of following silicon steel sheet and the magneticaction face between ferro-gum, make to be lost in airborne flux and to be reduced to minimumly, can start easily by this, make the little and rotational efficienty height of starting current.

Below with reference to the accompanying drawings fan motor structure of the present utility model is elaborated,

Fig. 1 is the three-dimensional exploded view of conventional fan motor.

Fig. 2 is the distribution schematic diagram at conventional fan motor magnetic force center.

Fig. 3 is that the conventional fan magnetic line of force is lost in airborne schematic diagram.

Fig. 4 is the three-dimensional exploded view of the utility model embodiment.

Fig. 5 is the expanded view of ferro-gum among the utility model embodiment.

Fig. 6 is the magnetic force off-centring schematic diagram between the utility model embodiment ferro-gum and silicon steel sheet anchor ring.

Fig. 7 is the distribution schematic diagram of the magnetic line of force between ferro-gum and silicon steel sheet anchor ring among the utility model embodiment.

Fig. 8 is the schematic diagram of rotor (ferro-gum) stop place during no power among the utility model embodiment.

Fig. 9 is the gap magnetic line of force distribution schematic diagram during no power among the utility model embodiment.

Figure 10 is that the utility model embodiment hall detector induction ferro-gum makes two groups of coils commutation conductings, allows the magnetic force alternation and the gap magnetic line of force distribution schematic diagram that rotates.

Figure 11 is that hall detector induction ferro-gum makes two groups of coils commutation conductings among the utility model embodiment, allows the magnetic force alternation and the gap magnetic line of force distribution schematic diagram that rotates.

As shown in Figure 4, the utility model embodiment comprises rotor 10, ferro-gum 20, central shaft tube 30, last silicon steel sheet 40, following silicon steel sheet 45, two insulating trips 50, coil 60, circuit board 70, shell block 80 etc.

Rotor 10 is the plastic material global formation, and peripheral ring forms a plurality of blades 11, and rotor 10 central authorities are provided with an axle 12, and the axle peripheral ring forms a fit chamber 13.

Ferro-gum 20 is shown in the expanded view of Fig. 5, which is provided with the multiple tracks skewed slot 21 of predetermined oblique angle, skewed slot 21 numbers are that corresponding upper and lower silicon steel sheet 40 is the stator magnet number of poles with 45() be designed to even number road skewed slot, be provided with the peripheral ring that circle four road skewed slot 21(and fit chamber 13 on the internal ring wall 14 that cements in fit chamber 13 are used for the aforementioned upper and lower silicon steel sheet 40 of cover cap and 45, insulating trip 50, coil 60 in the present embodiment).

Central shaft tube 30, its center is provided with an axis hole 31, it is passed in regular turn aforementionedly goes up silicon steel sheet 40, insulating trip 50, coil 60, insulating trip 50, member such as silicon steel sheet 45, circuit board 70, shell block 80 and overall fixed (make upper and lower silicon steel sheet 40 be the pre-determined tilt angle of cut with 45 through fixing the intersection up and down afterwards down, and pass the axis hole 31 and shell block 80 of central shaft tube 30 again with the mandrel 12 of rotor 10, and mandrel 12 is buckled admittedly by shell block 80 bottoms with a C type clasp 90 form).

Last silicon steel sheet 40 central authorities are provided with one for the solid axis hole 41 of cover, and two ends stretch out, and 90 degree bendings respectively form an anchor ring 42 with being downward vertically, make integral body be Jiong shape.

The central authorities of following silicon steel sheet 45 are provided with one for the solid axis hole 46 of cover, two ends stretch out and the last silicon steel sheet 40 corresponding vertical 90 degree bendings respectively formation anchor rings 47 that make progress that are, integral body also roughly is Jiong shape, its structure is axially respectively to offer symmetrically on its anchor ring 47 ditch 48 with the difference of last silicon steel sheet 40, each anchor ring 47 all is cut separates big anchor ring 471 of formation and little anchor ring 472, and " big anchor ring 471 is identical with anchor ring 42 sizes ", just, the anchor ring of following silicon steel sheet is greater than the anchor ring of last silicon steel sheet.

Circuit board 70, book office is provided with a hall detector 68 thereon, makes two groups of coil commutation conductings as the induction ferro-gum.

Fig. 6 is the schematic diagram of the magnetic force off-centring of 42,47 of expression the utility model embodiment ferro-gum 20 and upper and lower

silicon steel sheet

40,45 anchor rings, to be the involutory coating coil of square crossing 60(each other not shown when last silicon steel

sheet anchor ring

42 and 471 of the big anchor rings of following silicon steel sheet) time, 40,50 real magnetic force centers 28 of ferro-gum 20 and upper and lower silicon steel sheet, with the magnetic force center of representing Fig. 2 of structure in the past relatively under, obviously reached the purpose that makes its skew magnetic force central point.

Fig. 7 is the schematic diagram of distribution of the magnetic line of force 38 parts of 42,47 of expression the utility model ferro-gum 20 and upper and lower

silicon steel sheet

40,45 anchor rings, the utility model is via above-mentioned structure kenel, the airborne magnetic line of force that is lost in of 18 parts among the Fig. 3 that represents structure in the past can be exempted, rotational efficienty of the present utility model can be promoted.

More than be general introduction to the composition aufbauprinciple of the utility model fan motor structure, below, again with action of the present utility model, construction features and the effect that reaches with reference to the accompanying drawing statement as after.

The schematic diagram of rotor stop place when Fig. 8 is expression the utility model no power, this moment rotor 10 20 stop places of ferro-gum, oblique line partly might be N or S, oblique line partly is S or N relatively, blacking partly is hall detector 68 in the drawings, for sensing ferro-gum 20 polarity chrons, promptly allow arbitrary group of (not shown) conducting of two groups of coils 60 on the stator, go up as seen from the figure, though on following

silicon steel sheet

40 and 45, following decussate shape, but, its magnetic force central point is not at criss-cross intersection central point, promptly because of the structure of ditch 48 is all arranged on the following silicon steel sheet anchor ring 47, four road skewed slot 21(are not shown on the compound rubber magnet 20) layout, so by four anchor rings 42, the 47 real magnetic force central points that constituted roughly are the pre-determined tilt angle, when fan motor is stopped, on, following silicon steel sheet 40 and four anchor rings 42 of 45,47 and four road skewed slot 21(of ferro-gum 20 not shown) between constitute unbalanced suction magnetic (magnetic hysteresis) characteristic, magnetic hysteresis when allowing the fan motor starting becomes minimum (elimination dead point), starting easily.

Gap 58 magnetic line of force distribution schematic diagrams when Fig. 9 is the expression no power, gap 58 is meant the gap between ferro-gum 20 and upper and lower

silicon steel sheet

40 and 45, because the utility model has vertically downward or the anchor ring of upwards bending 42,47 structures, so, the magnetic line of force that ferro-gum 20 and upper and lower

silicon steel sheet

40,45 anchor rings are 42,47 can make it be lost in airborne part and can be reduced to minimum.

Figure 10 is that expression the utility model hall detector 68 induction ferro-gums 20 make two groups of coil commutation conductings, the gap that allows the magnetic force alternation and the rotate (schematic diagram that 58 magnetic lines of force distribute, be that silicon steel sheet 40 is extremely given birth to N, following silicon steel sheet 45 polarity are gap 58 magnetic line of force distribution scenario of S among the figure, this moment, rotor 10(was not shown) to rotation counterclockwise.

Figure 11 be expression be S when hall detector 68 induction ferro-gums 20 make silicon steel sheet 40 polarity, when silicon steel sheet 45 polarity are N down, its reason is also identical, because skewed slot 21(is not shown) hall detector 68 is responded to ahead of time, so there is the dead point existence.

What deserves to be mentioned is at this, why design on the utility model ferro-gum 20 and be skewed slot 21 structures, and be not designed to the reason of straight trough structure, be little with the cogging torque of skewed slot 21 structures, for motor, the torque that the flux change that the motor rotor position difference caused when cogging torque was low speed produces, therefore the utility model can make it rotate smoothly and obtain preferable flatness, after reality test relatively, record starting voltage that the utility model embodiment adopts skewed slot 21 structure only must 7Vdc about, starting voltage about then must 9Vdc when adopting the straight trough structure, the utility model skewed slot structure has the characteristics of easy starting.

Now the advantage that again the utility model fan motor structure is provided is concluded and is described below:

By going up, following

silicon steel sheet

40,45

anchor rings

42,47 constitute the involutory covering thread coil structures of intersection that does not become 90 degree, on making, the anchor ring cross coupled that following silicon steel sheet chow ring symmetry is bending 90 degree coats after the coil, in making its magnetic force, be formed centrally the inclination angle of cut of being scheduled to, and on the interior ferro-gum 20 that is located in the rotor, establish four road skewed slots 21, see through last, following silicon steel sheet 40, each anchor ring 42 of 45, the magneticaction face that 47 increases and ferro-gum are 20, make to be lost in airborne flux (magnetic line of force) and to be reduced to minimumly, overall structure has easy starting, low and the rotational efficienty advantages of higher of starting current.

The utility model is when allowing fan motor shut down, it inhales magnetic dwell point and nonopiate, and, the magnetic force central point is not to be cross and roughly to be the pre-determined tilt angle, make rotor 10 moment very easily break magnetic balanced point in starting, ferro-gum 20 and

anchor ring

42,47 faint suction magnetic force of only depositing, easier slippage during each skewed slot 21 of rotation process, can eliminate and inhale the magnetic dead point, effectively reduce starting current, and the more important thing is, by last, following

silicon steel sheet

40 and 45 corresponds to each other and is the anchor ring 42 that 90 degree are bent to form, two groups of coils 60 of 47 cover caps, it is minimum that the aerial quantity of flux loss that coil 60 is produced reaches, can improve rotational efficienty, add the improvement of as shown in the figure fan blade 11 being constructed, more can significantly improve the fan radiating effect.

Claims

1, a kind of fan motor structure, silicon steel sheet, insulating trip, coil, insulating trip, following silicon steel sheet on being provided with in regular turn on the circuit board in shell block, and pass above-mentioned member overall fixed with a central shaft tube and form stator structure, a rotor mandrel is pivoted in the central shaft tube, the indoor ferro-gum that is equipped with of the fit of rotor, and cover the peripheral ring of stating member with rotor cap, it is characterized in that:

On described upper and lower silicon steel sheet, respectively be provided with an axis hole, upper and lower silicon steel sheet is stretched out and be vertically downward, upwards the symmetry bending respectively forms an anchor ring, on the following silicon steel sheet anchor ring then vertically symmetry offer the profile groove cutting and form large and small anchor ring;

On ferro-gum, be provided with and cooperate several skewed slot of silicon steel sheet.

2, structure according to claim 1 is characterized in that being made as several skewed slot of the even number road skewed slot of corresponding silicon steel sheet on described ferro-gum.

3, structure according to claim 1, the anchor ring of silicon steel sheet is greater than the anchor ring of last silicon steel sheet under it is characterized in that.