CN2896659Y - Brush-free dc. motor - Google Patents
Brush-free dc. motor Download PDFInfo
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- CN2896659Y CN2896659Y CN 200620072416 CN200620072416U CN2896659Y CN 2896659 Y CN2896659 Y CN 2896659Y CN 200620072416 CN200620072416 CN 200620072416 CN 200620072416 U CN200620072416 U CN 200620072416U CN 2896659 Y CN2896659 Y CN 2896659Y
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- magnet steel
- brushless
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Abstract
A brushless DC motor can be mounted on refrigeration devices for a driver, such as refrigerators, refrigerating cabinets, reefer containers and ice machines, etc.. This device comprises a rotator mechanism, a stator mechanism, a piston type air admission and air discharge mechanism, a machine enclosure, a machine cover and rotator mechanism including rotating shaft and iron cores on the rotating shaft and magnetic iron on the iron core. It is characterized in that the upper concave is provided with magnetic limit socket and the iron core between every two magnetic sockets is provided with magnetic steel socket cavity; the magnetic steel is flat and inserted into the magnetic steel socket cavity. In such structure, the magnetic steel sleeves for hoping and protecting magnetic steel can be saved so as to reduce the costs; the magnetic steel is flat and in favor of processing for production in quantities; the compressive strength and crushing resistance strength of flat magnetic steel is much better than tile type magnetic steel; the magnetic limit socket is directly mounted on the iron core so as to avoid short circuits; the limit flange can limit the upper and lower end surfaces of magnetic steel inserted into the middle and rear parts of magnetic steel sockets so as to prevent transverse displacement.
Description
Technical field
The utility model relates to a kind of brushless DC motor, is installed on the refrigerating plant of refrigerator, refrigerator-freezer, refrigerating box, ice machine and so on, as the operation power of refrigerating plant.
Background technology
The refrigeration of traditional refrigerating system such as refrigerator, refrigerator-freezer, freezing and refrigeration cabinet, ice machine etc. mostly adopts the monopole asynchronous motor constant speed compressor to start under the alternating voltage of 220V, its starting current is very big, be 4～6 times of rated operational current, electrical equipment is on every side produced serious disturbance, and noise is big, inefficiency.In addition, the rotating speed of alternating current machine and number of poles are mutual restriction, and its maximum speed is lower than 3000 rev/mins, so influenced the raising of the refrigerating speed of refrigeration plant.In order to improve the combination property of refrigerant compressor, can only carry out speed regulating control to the motor of compressor, the energy saving in running pattern, so on the refrigeration of refrigerator, refrigerator-freezer, ice machine etc., have at present and adopt the AC frequency conversion compressor, the operating efficiency of this refrigerant compressor increases, but have the lower deficiency of power factor, because of its power factor can only reach 0.6～0.7, electric energy loss is bigger.As is known in the industry, the easier realization speed governing of brushless DC motor, its operating efficiency is higher than common AC frequency conversion compressor.The AC system refrigerant compressor is except above-described defective, its deficiency also is to possess AC power, and when suffering from power failure or for some the occasion of dc low-voltage power supply only being arranged, on transport facilitys such as car, ship, just can't use the refrigeration plant that is equipped with the AC system refrigerant compressor, particularly,, above-mentioned refrigeration plant brings great inconvenience can for the long-distance transport or the driver of travelling, passenger's life because can't using in season hot summer.
Yet, above-mentioned condition is eliminated by the technical scheme that the disclosed name of 03278029.X is called the straight flow refrigerant compressor by China Patent No., concrete structure is by shown in Figure 3, it comprises rotor mechanism 1, stator mechanism 2, piston type intake and exhaust mechanism 3, casing 4, cover 5, it has following achievement part to the full content disclosed from this patent as can be known: 1, directly utilize the low-voltage direct source via controller modulation back starting of magnitude of voltage for 12V～24V, low-voltage dc power supply generally can be selected storage battery for use, accumulator jar etc., thereby under the very little situation of electric current, obtain enough starting torques, realize soft start, avoid the impact and the interference of electrical equipment on every side, and can prolong the life-span of compressor and motor; 2, because the rotating speed of permanent-magnet brushless DC electric machine is not subjected to the restriction of number of poles, so can according to actual needs speed governing be carried out in the rated speed design of motor in 2000～3600 rev/mins zone, thereby improved the refrigerating speed of compressor, reached the effect of fast-refrigerating; 3, little, the high efficiency of volume, energy consumption is low, power factor is high, the compressor good combination property; 4, for rotor mechanism 1, because magnet steel 12 outsides are surrounded by stainless magnetic steel sleeve 121, magnet steel 12 and iron core 11 are fixed up, can prevent effectively that magnet steel 12 from splitting away off from iron core 11; 5, owing to after crashproof, buffer spring are set, make motor have good crashproof, anti-seismic performance.
; the applicant finds; the structure of the rotor mechanism 1 of the disclosed straight flow refrigerant compressor of above-mentioned patent is and is irrational; at first; many pieces of magnet steel 12 be with the cladding form post on iron core 11; be that magnet steel 12 is located on the outer wall all around of columned iron core 11; constitute the magnet steel external; and because magnet steel 12 shows as external; so needing the magnetic steel sleeve 121 of employing stainless steel to carry out admittedly protects; in order to avoid magnet steel 12 splits away off from iron core 11; so just brought following shortcoming: the one, can realize well pasting touching with the outer wall of iron core 11 in order to make magnet steel 12, thus each piece magnet steel 12 must be processed into a watt shape, and the reason known as industry; magnet steel 12 for watt shape; not only difficulty of processing is big, hinders production in enormous quantities, and self shape of the magnet steel 12 of watt shape has determined its compression strength comparatively fragile; rate of finished products in the course of processing is difficult to improve, and hinders the saving cost; The 2nd, though be formed with magnetic limited slot 14 between many pieces of magnet steel 12, but, the effect that prevents magnet short-cut path that this magnetic limited slot 14 is brought into play is undesirable, there is the anxiety that magnet short-cut path takes place, obtain by the spaced apart between adjacent two pieces of magnet steel 12 because only be, and the spaced apart between adjacent two pieces of magnet steel 12 is difficult to guarantee unanimity when assembling, thereby brings puzzlement to assembly technology; The 3rd, for magnet steel 12, the magnetic steel sleeve 121 of stainless steel is just as magnet steel 12 it " coat ", be configuration magnetic steel sleeve 121, certainly will bring the tediously long of the increase of the raising of cost and amount of parts and assembly technology, moreover the installation requirement of magnetic steel sleeve 121 is very harsh, should take into account and not show crushing magnet steel 12, consider again to avoid coming off.
Summary of the invention
Top priority of the present utility model is that magnet steel handling ease that a kind of rotor mechanism will be provided, intensity are desirable and be beneficial to the brushless DC motor of producing in enormous quantities and reducing cost, magnet short-cut path can not take place between the magnet steel.
An also task of the present utility model is the brushless DC motor that the magnet steel that a kind of rotor mechanism will be provided can play, come off.
For top priority of the present utility model is finished in embodiment, technical scheme provided by the utility model is, a kind of brushless DC motor, it comprises rotor mechanism 1, stator mechanism 2, piston type intake and exhaust mechanism 3, casing 4, cover 5, rotor mechanism 1 comprises the armature spindle 13 that links with described piston type intake and exhaust mechanism 3 and is installed in the iron core 11 on the armature spindle 13 and is arranged at magnet steel 12 on the iron core 11, characteristics are: be concaved with magnetic limited slot 14 on the described iron core 11, offer magnetic steel slot cavity 111 on the iron-core workpiece between per two magnetic limited slots 14; Described magnet steel 12 be shaped as flat, be plugged in the described magnetic steel slot cavity 111.
For an also task of the present utility model is finished in embodiment, technical scheme provided by the utility model is, be installed with solid bluff piece 112 respectively on the upper and lower surface of described iron core 11, carry out spacing spacing bead 1121 Gu extend the magnet steel 12 that is useful on plugging in the magnetic steel slot cavity 111 on the bluff piece 112.
The quantity of magnetic limited slot 14 described in the utility model is the quantity greater than 2 even number, and the quantity of described magnetic steel slot cavity 111 equates that with the quantity of magnetic limited slot 14 quantity of described magnet steel 12 equates with the quantity of magnetic steel slot cavity 111.
The width of magnetic steel slot cavity 111 described in the utility model is suitable with the thickness of magnet steel 12.
The degree of depth of magnetic steel slot cavity 111 described in the utility model is suitable with the height of magnet steel 12.
The position that spacing bead 1121 described in the utility model is extended on solid bluff piece 112 is substantially corresponding to the accent middle part of magnetic steel slot cavity 111.
One of the utility model advantage compared with the prior art, because the magnet steel 12 that becomes original rotor mechanism 1 is embraced with external is located on the iron core 11 to be inserted in the iron core 11 built-inly, be used to bind round the magnetic steel sleeve 121 that protects magnet steel thereby can save, help low changing into originally; Two, magnet steel 12 is flat, very helps processing and fabricating, can satisfy the volume production requirement; Three, resistance to compression, the crushing strength of the magnet steel 12 of flat come much better than compared with a watt shape; Four, magnetic limited slot 14 directly is formed on the iron core 11, can be effectively and thoroughly avoid the generation of magnet short-cut path phenomenon; Five, spacing bead 1121 can be spacing to the upper/lower terminal end face of the magnet steel 12 after plugging in the magnetic steel slot cavity 111, can prevent the axial endplay that magnet steel 12 might occur effectively, the magnetic steel slot cavity 111 of promptly scurrying out.
Description of drawings
Fig. 1 is the structure chart of the utility model brushless DC motor.
Fig. 2 is the structure chart of rotor mechanism 1 of the present utility model.
Fig. 3 is the structured soil of the straight flow refrigerant compressor in the prior art.
Embodiment
By the detailed description of the following examples, can not only be fully understood the utility model, and the positive effect that can realize the utility model essence and be brought, still, embodiment can not be used for constituting the restriction to technical solutions of the utility model.
In Fig. 1, provided the overall structure of the utility model brushless DC motor, it comprises rotor mechanism 1, stator mechanism 2, piston type intake and exhaust mechanism 3, casing 4, cover 5, stator mechanism 2 comprises stator core 21 and stator winding 22, stator core 21 is with stator winding 22 assembly or be installed in after outsourcing in the casing 4, specifically be fixed installation groove, realize making whole stator mechanism 2 to be arranged in the casing 4 by screw 2111 and by means of spring bases 41 default in the casing 4 and the buffer spring 411 that on spring base 41, is provided with fixing feet 211 by four bights of stator core 21.The lead-out wire 221 of the stator winding 22 of three-phase structure is routed to the electric source connecting box of being located on the casing 4 42, and crashproof 212 that is located on the stator core 21 has been spacing crashproof effects.
Piston type intake and exhaust mechanism 3 comprises cylinder block 31, cylinder head 32, piston rod 33, eccentric shaft 34, counterweight 35, cylinder body holder 36, muffler 37, escape pipe 38, blast pipe 39, be positioned at after the mutual assembly of above-mentioned parts by cover 5 and 4 cavitys that constitute jointly of casing, since structure, the mechanism of action of this piston type intake and exhaust mechanism 3 be with and the ZL03278029.X that in front mention disclosed by Chinese patent in the structure mentioned corresponding to, therefore, the applicant only does briefly bright to this mechanism.Cylinder head 32 fixes by screw and cylinder block 31, in order to make both good sealing effectiveness can be arranged, and then adds cylinder-top gasket 321.Cylinder body holder 36 is extended by cylinder block 31 and forms, prop up by its fixing feet 361 and to be fixed on the stator core 21, one end of piston rod 33 links with the piston that is arranged in cylinder block 31, the other end is nested with and is extending on the eccentric shaft on the counterweight 35 34, counterweight 35 fixes with the armature spindle 13 of rotor mechanism 1, specifically: armature spindle 13 is by rotor axle bed 131 and passed through cylinder body holder 36 and realize being in transmission connection with counterweight 35, rotation along with armature spindle 13, thereby drive counterweight 35 motions, and then make piston rod 33 reciprocating, make piston reciprocating in cylinder block 31, realize the intake and exhaust action.Air inlet pipe 38 is installed on the cover 5, and blast pipe 39 is installed on the casing 4, and air inlet pipe 38 communicates with air inlet pipe 371 on being arranged on muffler 37, and muffler 37 connects below cylinder head 32.
In Fig. 2, this figure has more clearly provided the rotor mechanism 1 of the utility model brushless DC motor, on the iron core 11 that forms by silicon (silicon) steel disc lamination, be concaved with magnetic limited slot 14, the given magnetic limited slot 14 of present embodiment is cross distribution, promptly have four magnetic limited slots 14, but be not subjected to the restriction of this diagram quantity, for example six, article eight,, article ten, so the magnetic limited slot 14 of greater number be fine equally, but the quantity of magnetic limited slot 14 should be even number, and be even number greater than natural number 2, because two magnetic limited slots 14 are unfavorable for being the setting of the magnet steel 12 of offset flat shape.As preferred example, the applicant selects four magnetic limited slots 14, is elaborated at this preference below.Owing to there are four magnetic limited slots 14, what have just therefore that four magnetic limited slots 14 are separated is fan-shaped iron core lobe piece substantially, whole and be petal-shaped.Be formed with magnetic steel slot cavity 111 on the petal-like iron-core workpiece between per two magnetic limited slots 14, this magnetic steel slot cavity 111 should be the vallecular cavity that connects, and plugs one piece of magnet steel 12 in each magnetic steel slot cavity 111.See by figure, whole magnetic steel slot cavity 111 forms the swallow-tail form except that two ends, the rectangular shape in middle part, more particularly be rectangle, and the groove width at magnetic steel slot cavity 111 middle parts is that thickness with magnet steel 12 is complementary, be compensated after promptly being inserted by magnet steel 12, the degree of depth of magnetic steel slot cavity 111 then depends on the height of whole iron core 11, and this height highly also lucky and magnet steel 12 adapts.See again, be installed with solid bluff piece 112 respectively, Gu equally also be formed with on the bluff piece 112 and described magnetic limited slot 14, magnetic steel slot cavity 111 corresponding to corresponding grooves on the upper and lower surface of iron core 11.After in magnet steel 12 is planted corresponding magnetic steel slot cavity 111, axial endplay occurs, therefore, just impose spacing by the spacing bead 1121 that is arranged on the solid bluff piece 112 in order to prevent magnet steel 12.Specifically: before in magnet steel 12 is not planted magnetic steel slot cavity 111, spacing bead 1121 is roughly keeping the plumbness with solid bluff piece 112 on solid bluff piece 112.And as soon as after magnet steel 12 is inserted in magnetic steel slot cavity 111, as long as spacing bead 1121 foldings are opened up about 90 ° with instrument, make it roughly be the level of state and get final product, thereby can make the accent of spacing bead 1121 block magnetic steel slot cavities 111, can stop the play of magnet steel 12 so effectively with protecting part 112 admittedly.As for the quantity of spacing bead 1121 corresponding to every magnetic steel slot cavity 111, though be chosen as one in the drawings, this is not unique, for example can there be two, correspond respectively to the inclined to one side both sides of accent of magnetic steel slot cavity 111, and for example, can have three, reason is the same, therefore, quantity to spacing bead 112 there is no need to limit, and in fact, each spacing bead 1121 is only used in the shutoff of the two ends accent of magnetic steel slot cavity 111, and it is enough.In addition, for the concrete shape of spacing bead 1121, need not equally to limit in the utility model, for example both can be the lobe bulk of semicircle lobe, also can be rectangular-shaped, can also be other shape.
By giving the detailed description that Fig. 2 did to the applicant, be appreciated that out following essence fully, magnet steel 12 be not resemble by shown in Figure 3 with the obvolvent form be attached to iron core 11 and get on, but plug in the magnetic steel slot cavity 111 on the iron-core workpiece that is complementary, so just can save the magnetic steel sleeve 121 (Fig. 3) of material price costliness with the unique texture of its flat; It also is self-evident that the industrialization manufacturability of the magnet steel 12 of flat is compared with a watt shape, and intensity is as the same; The play that occurs magnet steel 12 for making provision against emergencies is then remedied by spacing bead 1121, or the like, therefore, the utility model design should be ultimate attainment.
The disclosed operation principle of ZL03278029.X is identical as previously mentioned with prior art for operation principle of the present utility model, only giving letter reaches, when stator winding 22 passes to electric current, in stator core 21, form magnetic field, this magnetic field and permanent magnetism mover magnetic field interaction produce rotating magnetic field, thereby force iron core 11 rotations, make armature spindle 13 rotation, the bottom of armature spindle 13 or claim the lower end to extend in the spacing collar 132 on casing 4 (among Fig. 1).Along with the rotation of armature spindle 13, rotate together thereby drive counterweight 35, and then do left and right reciprocating motion by the 34 drive piston rods 33 of the eccentric shaft on the counterweight 35, realize the suction and discharge action of piston type intake and exhaust mechanism 3.
Claims (7)
1, a kind of brushless DC motor, it comprises rotor mechanism (1), stator mechanism (2), piston type intake and exhaust mechanism (3), casing (4), cover (5), rotor mechanism (1) comprises the armature spindle (13) that links with described piston type intake and exhaust mechanisms (3) and is installed in the iron core (11) on the armature spindle (13) and is arranged at magnet steel (12) on the iron core (11), it is characterized in that being concaved with magnetic limited slot (14) on the described iron core (11), on the iron-core workpiece between per two magnetic limited slots (14), offer magnetic steel slot cavity (111); Described magnet steel (12) be shaped as flat, be plugged in the described magnetic steel slot cavity (111).
2, brushless DC motor according to claim 1, it is characterized in that being installed with solid bluff piece (112) respectively, carry out spacing spacing bead (1121) Gu extend the magnet steel (12) that is useful on plugging in the magnetic steel slot cavity (111) on the bluff piece (112) on the upper and lower surface of described iron core (11).
3, brushless DC motor according to claim 1, the quantity that it is characterized in that described magnetic limited slot (14) is the quantity greater than 2 even number, the quantity of described magnetic steel slot cavity (111) equates that with the quantity of magnetic limited slot (14) quantity of described magnet steel (12) equates with the quantity of magnetic steel slot cavity (111).
4, according to claim 1 or 2 or 3 described brushless DC motors, the width that it is characterized in that described magnetic steel slot cavity (111) is suitable with the thickness of magnet steel (12).
5, according to claim 1 or 2 or 3 described brushless DC motors, the degree of depth that it is characterized in that described magnetic steel slot cavity (111) is suitable with the height of magnet steel (12).
6, brushless DC motor according to claim 2 is characterized in that position that described spacing bead (1121) extended is substantially corresponding to the accent middle part of magnetic steel slot cavity (111) on solid bluff piece (112).
7,, it is characterized in that in semicircle lobe bead, rectangle bead, the special-shaped bead any one of being shaped as of described spacing bead (1121) according to claim 2 or 6 described brushless DC motors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620072416 CN2896659Y (en) | 2006-04-05 | 2006-04-05 | Brush-free dc. motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620072416 CN2896659Y (en) | 2006-04-05 | 2006-04-05 | Brush-free dc. motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2896659Y true CN2896659Y (en) | 2007-05-02 |
Family
ID=38066231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620072416 Expired - Fee Related CN2896659Y (en) | 2006-04-05 | 2006-04-05 | Brush-free dc. motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2896659Y (en) |
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2006
- 2006-04-05 CN CN 200620072416 patent/CN2896659Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070502 Termination date: 20150405 |
|
| EXPY | Termination of patent right or utility model |