CN208835850U - Commutate polar form rotor, motor and air conditioner - Google Patents

Abstract

The utility model provides commutation polar form rotor, motor and air conditioner, commutation polar form rotor has: rotor core, it has the first pole parts and the second pole parts, first polarity of first pole parts with multiple permanent magnets and with permanent magnet generation, the second pole parts are formed between adjacent permanent magnet and have second polarity different from the first polarity；Ringshaped magnet is set to the axial one end of rotor core, and ringshaped magnet has: multiple position detecting magnets, they are arranged along the direction of rotation of rotor core, for detecting the first pole parts of rotor core and the position of the second pole parts；Multiple linking parts, they are set between adjacent position detecting magnet, adjacent position detecting magnet is connected to each other, and for multiple position detecting magnets, the polarity of the magnetic pole of the end face of the side opposite with rotor core in axial direction is polarity identical with the second polarity.

Description

Commutate polar form rotor, motor and air conditioner

Technical field

The utility model relates to polar form rotor, motor and the air conditioners of commutating.

Background technique

In the past, in order to improve the energy saving of air conditioner, it is equipped on the permanent magnet one of the motor of the compressor of air conditioner As the rare earth element magnet high using energy density as neodymium sintered magnet.In addition, being developed for the fan for air conditioner Use the motor of neodymium sintered magnet.

Such permanent magnet contains valuable rare earth element, thus at high price.Therefore permanent magnet to be reduced makes Dosage and processing charges are strong come the requirement for reducing cost.

Permanent magnet is generally processed into specified shape by cutting block-like piece.Therefore the permanent magnetic that motor uses The number of iron is more, and processing charges more increase.

As the method for cutting down permanent magnet number used in motor, exists and constitute rotor with so-called commutating pole Method.In commutation polar form rotor, magnet poles caused by permanent magnet and core material is not formed in by permanent magnet The circumferentially alternating arrangement of salient pole.Therefore the number of magnet poles and the number of salient pole are the number of the half of number of poles.In addition, pole The magnet poles polarity having the same of the number of number half, the salient pole of the number of number of poles half have different from magnet poles Polarity.In this way, the number of permanent magnet becomes the number of common half in commutation polar form rotor.However in commutation polar form In rotor, inductance is different from salient pole in magnet poles, therefore there is the imbalance by the inductance and vibration and noise is caused to increase Big project.

For the project, the disclosed commutation polar form rotor of patent document 1 passes through the magnetic flux barrier at research permanent magnet both ends Shape improves the asymmetry of inductance, realizes vibration and the reduction of noise.Turned using commutation polar form disclosed in patent document 1 The motor of son has the Magnetic Sensor of the position on the direction of rotation of detection rotor, and Magnetic Sensor passes through to the magnet from rotor Salient pole of the magnetic pole along the first magnetic field axially leaked out and from rotor is alternately carried out detection along the second magnetic field axially leaked out, into The rotation of row rotor controls.

Patent document 1: Japanese Unexamined Patent Publication 2012-244783 bulletin

However, in the rotor for the polar form that commutates disclosed in patent document 1, from magnet poles along the magnetic flux ratio that axially leaks out from Salient pole is big along the magnetic flux axially leaked out, thus is become larger by the imbalance in the first magnetic field and the second magnetic field of Magnetic Sensor detection, has May make the detection accuracy of rotation position reduces.

Utility model content

The utility model is made in view of the foregoing, it is therefore intended that obtains the detection essence that can be improved rotation position The commutation polar form rotor of degree.

In order to solve the above problems and realize purpose, the commutation polar form rotor of the utility model has: rotor core, tool There are the first pole parts and the second pole parts, first pole parts are with multiple permanent magnets and have permanent magnet institute The first polarity generated, second pole parts are formed between adjacent permanent magnet and have different from the first polarity The second polarity；And ringshaped magnet, it is set to the axial one end of rotor core, ringshaped magnet has: multiple position inspections It surveys and uses magnet, they are arranged along the direction of rotation of rotor core, for detecting the first pole parts and the second magnetic of rotor core The position of pole part；With multiple linking parts, they are set between adjacent position detecting magnet, by adjacent position detection It is connected to each other with magnet, it is opposite with rotor core in the axial direction of rotor core for multiple position detecting magnets The polarity of the magnetic pole of the end face of side is polarity identical with the second polarity.

The commutation polar form rotor of the utility model is preferred are as follows: rotation of multiple position detecting magnet configurations in rotor core The consistent position of phase of the direction of rotation of the phase in direction and the second pole parts.

The commutation polar form rotor of the utility model is preferred are as follows: multiple position detecting magnets are used by thickness than position detection The thin linking part of the thickness of magnet and be interconnected.

The commutation polar form rotor of the utility model is preferred are as follows: rotor core has the multiple magnet being inserted into for permanent magnet and inserts Enter hole, multiple position detecting magnets have the protrusion for the positioning for carrying out position detecting magnet, and protrusion, which is inserted into, is inserted in magnetic Iron is inserted into the region between the permanent magnet and magnet insertion holes in hole.

The commutation polar form rotor of the utility model is preferred are as follows: detection is set in place with being provided with pedestal between magnet and protrusion, The pedestal is contacted with the one end of rotor core.

The commutation polar form rotor of the utility model is preferred are as follows: the thickness of position detecting magnet is bigger than the thickness of linking part.

The commutation polar form rotor of the utility model is preferred are as follows: position detecting magnet is made of binding magnet.

The motor of the utility model has commutation polar form rotor and stator described in any of the above embodiments.

The air conditioner of the utility model has above-mentioned motor.

The commutation polar form rotor of the utility model plays the effect that can be improved the detection accuracy of rotation position.

Detailed description of the invention

Fig. 1 is the cross-sectional view for having the motor of commutation polar form rotor of the embodiments of the present invention 1.

Fig. 2 is the cross-sectional view of molded stator shown in FIG. 1.

Fig. 3 is the cross-sectional view for indicating state of the molded stator inserted with rotor shown in Fig. 2.

Fig. 4 is to indicate to be made of multiple segmentation cores and expand into the structure chart of band-like stator core.

Fig. 5 is the figure for indicating the stator core bending by expansion shown in Fig. 4 and being configured to cricoid state.

Fig. 6 is the cross-sectional view of rotor shown in FIG. 1.

Fig. 7 is the perspective view of the commutation polar form rotor of the embodiments of the present invention 1.

Fig. 8 is the main view of rotor shown in Fig. 7.

Fig. 9 is the perspective view of ringshaped magnet shown in Fig. 7.

Figure 10 is the figure for indicating the first variation of commutation polar form rotor of the embodiments of the present invention 1.

Figure 11 is the main view of rotor shown in Fig. 10.

Figure 12 is the perspective view of ringshaped magnet shown in Fig. 10.

Figure 13 is the figure for indicating second variation of commutation polar form rotor of the embodiments of the present invention 1.

Figure 14 is the main view of rotor shown in Figure 13.

Figure 15 is the first perspective view of ringshaped magnet shown in Figure 13.

Figure 16 is the second perspective view of ringshaped magnet shown in Figure 13.

Figure 17 is the figure for indicating an example of structure for the air conditioner of the embodiments of the present invention 2.

Specific embodiment

Hereinafter, with reference to the accompanying drawings to the commutation polar form rotor, motor and air conditioner of the embodiments of the present invention into Row explains in detail.In addition, the utility model is not limited by the embodiment.

Embodiment 1.

Fig. 1 is the cross-sectional view for having the motor of commutation polar form rotor of the embodiments of the present invention 1.Shown in Fig. 1 Motor 100 have: molded stator 10, rotor 20 and be installed on molded stator 10 axial one end metal support Frame 30." axial direction " is equal to the stacking direction for constituting multiple rotor cores of rotor 20.Motor 100 is that rotor 20 has permanently Magnet and brushless DC motor by transducer drive.Rotor 20 is inner magnet swage and is commutation polar form.

Molded stator 10 has: stator 40 and the moulded resin 50 for covering stator 40, the axial direction and perforation of molded stator 10 It is consistent in the axial direction of the axis 23 of rotor 20.Be shown in FIG. 1 the constituent element as stator 40, stator core 41, be wound in The coil 42 of stator core 41, the insulation division 43 for being set to stator core 41 and the neutral terminal for being set to insulation division 43 44b.In addition substrate 45 that the constituent element as stator 40 is also shown in Fig. 1, being installed on insulation division 43 is assembled in base The conducting wire leads component 46 of plate 45, the conducting wire 47 drawn from conducting wire leads component 46, the IC being installed on substrate 45 (Integrated Circuit: integrated circuit) 49a and be installed on substrate 45 20 side of rotor face on as magnetic sense The Hall IC 49b of device.

Rotor 20 has: shaft assembly 27；Resin portion 24 is integrally formed 20 main body of rotor with shaft assembly 27；Load side Rolling bearing 21a, is installed on axis 23 and the bearing support 11 for being molded stator 10 supports；And the anti-load side axis of rolling 21b is held, axis 23 is installed on and is supported by bracket 30.Load side 110 indicates that in the both ends of the surface of motor 100, axis 23 is dashed forward End surface side out, anti-load side 120 indicate the end surface side for being provided with bracket 30.

In addition, rotor 20 has: multiple position detecting magnets 70, they are set to one of the rotor core 5 in axial direction End 5a, the position on direction of rotation for detecting rotor core 5；With multiple linking parts 71, they are respectively by position detection It is connected to each other with magnet 70.Hall IC 49b is alternately detected: from position detecting magnet 70 along the magnetic field axially generated and from Aftermentioned first pole parts are along the magnetic field axially generated, and by the signal of pulse type corresponding with the variation in magnetic field detected Output.IC49a is based on come the position on the direction of rotation of operation rotor 20 and carrying out rotor 20 from the signal that Hall IC 49b is exported Rotation control.The detailed construction of position detecting magnet 70 and linking part 71 is detailed in aftermentioned.In addition in the present embodiment, As the position detecting mechanism of the position on the direction of rotation of detection rotor core 5, using Hall IC 49b, but position detection machine Structure is not limited to Hall IC 49b, also can be used and alternately detects from position detecting magnet 70 along the magnetic field axially generated With the element from the first pole parts along the magnetic field axially generated.

Shaft assembly 27 has the insulating sleeve 26 being made of a pair of of insulating sleeve 26-1,26-2, and insulating sleeve 26 is configured at Between anti-load side rolling bearing 21b and axis 23.

Fig. 2 is the cross-sectional view of molded stator shown in FIG. 1.It is identical to constituent element mark identical with Fig. 1 in Fig. 2 Appended drawing reference.It is formed with opening portion 10b in molded stator 10 and in the axial one end of molded stator 10, rotor 20 is inserted into Opening portion 10b.In the axis of the load side rolling bearing 21a of the rotor 20 for being inserted into opening portion 10b chimeric molded stator 10 Hole 11a is offered to end, the diameter of hole 11a is bigger than the diameter of the shaft assembly 27 of rotor 20 shown in FIG. 1.

Fig. 3 is the cross-sectional view for indicating state of the molded stator inserted with rotor shown in Fig. 2.In Fig. 3, to Fig. 1 Identical constituent element marks identical appended drawing reference.The rotor 20 being inserted into from the opening portion 10b of molded stator 10 shown in Fig. 2 The load side for being configured to shaft assembly 27 penetrates through hole 11a shown in Fig. 2 and pulled into the outside of molded stator 10.At this point, installation It is press-fit into the load side rolling bearing 21a of axis 23 and is abutted with bearing support 11 shown in FIG. 1, and by bearing support 11 Bearing.Bearing support 11 is the axial end portion of molded stator 10, and is set to the opposite side of opening portion 10b.

Anti- load side rolling bearing 21b is installed in the anti-load side of shaft assembly 27.The peace of anti-load side rolling bearing 21b Dress is generally by indentation.In addition, detailed content describes later, but in the anti-load side of anti-load side rolling bearing 21b and axis 23 Between be provided with insulating sleeve 26, which is integrally formed in axis 23 and is formed.

Bracket 30 shown in FIG. 1 blocks the opening portion 10b of molded stator 10 shown in Fig. 2, and supports shown in Fig. 3 anti- Load side rolling bearing 21b, and be pressed into molded stator 10.Bracket 30 has bearing support 30a and press-in portion 30b, the pressure Enter portion 30b and bearing support 30a to be integrally formed.Bearing support 30a supports anti-load side rolling bearing 21b.Press-in portion 30b is ring-type.

Installation of the bracket 30 to molded stator 10 is pressed by will be pressed into portion 30b to the inner peripheral portion 10a of molded stator 10 The opening portion side 10b carry out.Internal diameter of the outer diameter of press-in portion 30b than the inner peripheral portion 10a of molded stator 10 goes out to be equivalent to pressure greatly Enter the size of amount.As the material of bracket 30, galvanized steel plain sheet, aluminium alloy, austenite stainless steel alloy, copper can be illustrated and closed Gold, cast iron, steel or ferroalloy.

Illustrate the structure of molded stator 10 below.Molded stator 10 shown in Fig. 2 has: stator 40 and mold formed use Moulded resin 50.Moulded resin 50 uses unsaturated polyester resin.Particularly, add in unsaturated polyester resin added with various Adding the claylike thermosetting resin of the block of agent (Bulk Molding Compound:BMC) is preferably that motor is used.Gather to benzene two Formic acid butanediol ester (PolyButylene Terephthalate:PBT), polyphenylene sulfide (Poly Phenylene Sulfide: ) etc PPS thermoplastic resin can recycle running channel when forming, thus there is also good aspects.

However, unsaturated polyester resin and BMC, by making linear expansion coefficient close to stator core 41, load side roll The linear expansion coefficient of the ferrous material of bearing 21a and anti-load side rolling bearing 21b etc, and percent thermal shrinkage is thermoplastic resin The 1/10 of rouge is hereinafter, thus excellent on embodying dimensional accuracy.

In addition, the case where forming the outer profile of motor 100 with the metal by iron and aluminium (aluminium) etc phase Than, in the case where forming the outer profile of motor 100 by unsaturated polyester resin and BMC, fine heat radiation property.In addition, In the case where the outer profile for forming motor 100 by metal, the problem of due to insulating properties and it is configured to make to be formed motor 100 The metal of outer profile leaves coil 42 and substrate 45.In contrast, since unsaturated polyester resin and BMC are insulant, because Even and if cover the problem of insulating properties is also not present in coil 42 and substrate 45, pyroconductivity is also higher, thus fine heat radiation property, has Help the high output of motor 100.

Load side rolling bearing 21a is supported by the bearing support 11 formed by moulded resin 50, the anti-load side axis of rolling Hold the inner peripheral portion 10a bearing that 21b and bracket 30 are formed by moulded resin 50.Therefore moulded resin 50 dimensional accuracy compared with In the case where difference, the axle center of the axle center of rotor 20 and stator 40 misplaces, thus become generate vibration and noise it is important because Element.However, the unsaturated polyester resin and BMC small by using percent thermal shrinkage, thus it is easy to ensure that ruler after mold formed Very little precision.

In addition, when motor 100 is in high temperature, there are bearings using the big resin of linear expansion coefficient Shaking become problem the case where.For unsaturated polyester resin and BMC, linear expansion coefficient close to stator core 41, The linear expansion coefficient of the ferrous material of load side rolling bearing 21a and anti-load side rolling bearing 21b etc, because regardless of electricity How is the temperature of motivation 100, is able to suppress the dislocation in the axle center of rotor 20 and the axle center of stator 40.

In addition, unsaturated polyester resin and BMC fetter stator 40 in solidification, it is thus possible to inhibit with motor The deformation of the stator 40 of 100 exciting force, and it is able to suppress vibration and noise.

Fig. 4 is to be made of multiple segmentation cores and expand into the structure chart of band-like stator core.Stator shown in Fig. 4 Iron core 41 by multiple segmentation cores 400 be arranged in multiple segmentation cores 400 respectively in multiple segmentation cores 400 other are adjacent One contact.Multiple segmentation cores 400 are respectively provided with back yoke 401 and from the teeth portion 402 outstanding of back yoke 401.In adjacent back The thinner wall section 403 that back yoke 401 is connected to each other is provided between yoke 401.

Fig. 5 is the figure for indicating the stator core bending by expansion shown in Fig. 4 and being configured to cricoid state.Shown in Fig. 5 Cricoid stator core 41 be after the coil 42 that multiple teeth portion 402 shown in Fig. 4 are applied with Fig. 1 respectively, will be band-like The group of segmentation core 400 is formed as cricoid structure in 403 bending of thinner wall section.

By multiple stator cores 41 for constituting of segmentation cores 400 as Fig. 4 and Fig. 5, can expand into it is band-like Wound around coil 42 under state, it is thus possible to realize the densification of coil 42, it is effective to high efficiency.However segmentation core 400 The rigidity of stator core 41 when being linked by thinner wall section 403, thus being formed as ring-type is lower, the motor 100 for the polar form that such as commutates Such biggish structure of exciting force molded stator iron core 41, is covered using unsaturated polyester resin using unsaturated polyester resin Lid stator core 41 is very effectively.

In addition, the stator core 41 being made of multiple segmentation cores 400 is in addition to being to use thinner wall section 403 by phase as shown in Figure 4 Other than adjacent back yoke 401 construction connected to each other, it can also be and form concavo-convex dowel (dowel) in the end of back yoke 401 And the construction that dowel is interconnected, and it is also possible to solid each other by welding or being fitted into the multiple back yokes 401 that will be separated from each other Fixed construction.By covering the stator core 41 constituted in this way with unsaturated polyester resin, vibration and noise can be reduced.

It is preferred that stator core 41 is completely covered with unsaturated polyester resin in this way, but as shown in Figure 2 will be from stator core 41 peripheral part 41-1 to unsaturated polyester resin peripheral part 10-1 thickness be set as T1, will be from the inner peripheral portion of stator core 41 When the thickness of inner peripheral portion 10-2 of 41-2 to unsaturated polyester resin is set as T2, molded stator 10 is preferably configured as meeting T1 > The relationship of T2.

If keeping thickness T2 excessive, the diameter of rotor 20, the magnetic gap between stator core 41 and rotor 20 must be reduced Increase, motor characteristic reduces.Therefore in the molded stator 10 of embodiment 1, by making thickness T1 be greater than thickness T2, by This improves the rigidity of the thickness T1 of radial outside.The radial direction of " radial direction " expression rotor 20.

In addition, if the axle center of rotor 20 and the axle center dislocation of stator 40 and between causing between stator core 41 and rotor 20 Gap generates uneven, then because exciting force caused by bias is overlapped, thus must reduce as far as possible bias to be assembled.If thickness T2 Increase, then correspondingly above-mentioned gap is easy to produce imbalance, thus keeps thickness T2 zero also very effective, but in this case, With space to the teeth portion front end between the adjacent teeth portion 402 of unsaturated polyester resin landfill stator core 41.As exciting force, There is also the power that teeth portion front end is rolled, and it is related to the influence of the power is inhibited to fill the space between teeth portion 402 completely.

In addition point in the case where Fig. 4 and stator core shown in fig. 5 41, between adjacent segmentation core 400 Unsaturated polyester resin is arranged in face 404, and thus, it is possible to inhibiting effect in the influence of the exciting force of teeth portion 402.

Therefore in stator core 41, the divisional plane 404 of cricoid stator core 41 shown in Fig. 5 is formed with hole 405. The hole 405 is formed and slot or notch is arranged between adjacent back yoke 401.When mold formed in cricoid stator core 41 When unsaturated polyester (UP), unsaturated polyester resin is filled in hole 405.It does not need in hole 405 in axial one from stator core 41 The whole region of end face to other end fills unsaturated polyester (UP), slightly fills from an axial end face for stator core 41 and is Can, even if in this case, can also expect the effect of decaying vibration.Due to more increasing hole 405 to increase loading, then Magnetic characteristic more reduces, thus suitably determines loading.In addition, even if the hole 405 of divisional plane 404 is in stator core 41 The groove shape that outer peripheral surface is open or the groove shape in 406 side opening of slot, can also obtain same effect.

Next the structure of rotor 20 shown in FIG. 1 is illustrated.

Fig. 6 is the cross-sectional view of rotor shown in FIG. 1.Rotor 20 includes cricoid rotor core 5 and circumferentially arranges Five magnet insertion holes 2.The circumferential direction of " circumferential direction " expression rotor 20.The number of magnet insertion holes 2 is the half of the number of poles of rotor 20. Five magnet insertion holes 2 are circumferentially arranged at equal intervals.Five magnet insertion holes 2 are from rotary shaft 6 with equidistant configuration.Rotary shaft 6 is consistent with the axis of rotor core 5.Five magnet insertion holes 2 along rotor core 5 axially through.Magnet insertion holes 2 are formed in Close to the position of the outer peripheral surface of rotor core 5, and circumferentially.It is separated between adjacent magnet insertion holes 2.Rotor core 5 There is shaft insertion hole 7 in central part.

Rotor core 5 as the core material of soft magnetism material by constituting, specifically, multiple electromagnetic steel plates are laminated and constitute.1 The plate thickness of electromagnetic steel plate is generally 0.1mm~0.7mm.

Permanent magnet 1 there are five being inserted into respectively in five magnet insertion holes 2.The section of permanent magnet 1 is the plate of rectangle Shape.As the plate thickness of permanent magnet 1,2mm can be exemplified.Permanent magnet 1 is rare earth element magnet, is with Nd (neodymium)-Fe (iron)-B (boron) is the neodymium sintered magnet of principal component.

Magnet insertion holes 2 are configured to include: the rectangular-shaped first area 3A and permanent magnet being inserted into for permanent magnet 1 1 two second area 3B being not inserted into, second area 3B are respectively formed at 1 at the both ends of the length direction of first area 3A.The Two region 3B have the function for the magnetic flux barrier for inhibiting leakage magnetic flux a to the permanent magnet 1 for being inserted into first area 3A, and have Make the magnetic flux distribution of the outer peripheral surface of rotor core 5 close to sine wave, make to be inserted into the permanent of adjacent magnet insertion holes 2 The magnetic flux of magnet 1 function short-circuit via rotor core 5.

Rotor 20 has 10 magnetic poles, they are arranged in the outer peripheral surface of rotor core 5 in the circumferentially alternating mode of polarity. In detail, rotor 20 includes five the first magnetic poles, they are respectively formed by five permanent magnets 1 and polarity having the same； With five the second magnetic poles, they are respectively formed in the rotor core 5 between permanent magnets adjacent to each other 1 and have and the first magnetic Extremely different polarity.In illustrated example, the first magnetic pole is the pole N, and the second magnetic pole is the pole S, but be may be reversed.The 10 of rotor 20 A magnetic pole by by interpolar away from 360 degree/10=36 degree is set as in a manner of, circumferentially equiangularly interval configuration.

In this way, the half of number of poles i.e. five permanent magnet 1 assigns five first respectively for the polar form rotor 20 that commutates Magnetic pole.Furthermore the second magnetic pole of the half of number of poles i.e. five is formed in rotor core 5 between permanent magnets adjacent to each other 1 respectively Core material.Second magnetic pole is so-called salient pole, is formed and magnetizing rotor 20.

Therefore in rotor 20, including permanent magnet 1 and have permanent magnet 1 caused by the first polar first magnetic pole Part 60 and do not include permanent magnet 1 core magnetic pole piece and have as imagination pole the second magnetic pole the second pole parts 61, Circumferential direction along rotor 20 is alternately arranged.Commutation polar form rotor 20 in, number of poles be 4 or more even number.

The shape of rotor core 5 is so-called colored round.Flower round refers to the outer diameter of rotor core 5 at pole center 62, the maximum and the smallest shape at interpolar 64 at 63 is the shape as arcuation from pole center 62,63 to interpolar 64.In extremely The heart 62 is the pole center of the first magnetic pole, and pole center 63 is the pole center of the second magnetic pole.In illustrated example, flower round refers to 10 Piece is with the petal just as size with the shape of impartial angle configurations.Therefore the outer diameter of the rotor core 5 at pole center 62 and pole The outer diameter of rotor core 5 at center 63 is equal.In addition the circumferential width of magnet insertion holes 2 is than interpolar away from wide.

Fig. 7 is the perspective view of the commutation polar form rotor of the embodiments of the present invention 1.Fig. 8 is rotor shown in Fig. 7 Main view.Fig. 9 is the perspective view of ringshaped magnet shown in Fig. 7.Rotor 20 has multiple position detecting magnets 70, they It is set to the axial one end 5a of rotor core 5, the position on direction of rotation for detecting rotor core 5.Adjacent Multiple linking parts 71 are provided between position detecting magnet 70, they are connected to each other by position detecting magnet 70 respectively.It is logical It crosses and position detecting magnet 70 and linking part 71 is alternately linked, ringshaped magnet 72 is consequently formed.

For respective for multiple position detecting magnets 70, the pole of the magnetic pole of a respective end face 70b1 in axial direction Property is polarity identical with the second polarity of the second pole parts 61, be arranged in on the direction of rotation of the second pole parts 61 The position of phase position.Specifically, position detecting magnet 70 has two end faces 70b1,70b2 in the axial direction.End face 70b1 is the end face of the side opposite with rotor core 5 of position detecting magnet 70.The polarity of end face 70b1 is the pole S.End face 70b2 is the end face of 5 side of rotor core of position detecting magnet 70.The polarity of end face 70b2 is the pole N.As shown in fig. 7, position Detection is axial with the flow direction of magnet 70.For the second pole parts 61, the polarity of radial outside is the pole S, radial The polarity of inside is the pole N.The pole S of second pole parts 61 is equivalent to above-mentioned second polarity.As shown in fig. 7, from the second magnetic pole piece Points 61 pole N indicates the flow direction of the second pole parts 61 towards the arrow of the pole S.Along axis in the magnetic flux of second pole parts 61 To the magnetic flux missed, by being assisted from position detecting magnet 70 along the magnetic flux that axial direction is missed, and examined by above-mentioned Hall IC 49b It surveys.In addition, the polarity of the radial outside of the first pole parts 60 is the pole N, the polarity of radially inner side is the pole S.First pole parts 60 pole N is equivalent to above-mentioned first polarity.As shown in fig. 7, being indicated from the pole N of the first pole parts 60 towards the arrow of the pole S The flow direction of first pole parts 60.As the respective material of multiple position detecting magnets 70, bonding magnetic can be exemplified Iron.By using binding magnet, thus compared with the case where using sintered magnet, the freedom of processing of position detecting magnet 70 Machining period when getting higher, thus manufacturing position detecting magnet 70 is reduced, and can reduce the manufacture of position detecting magnet 70 Cost.

Multiple linking parts 71 can be made of material identical with moulded resin 50 respectively, can also by with the first magnetic pole piece The magnet of 60 the first polarity identical polar is divided to constitute.Multiple linking parts 71 are made of material identical with moulded resin 50, by This can reduce the manufacturing cost of rotor 20 compared with the case where being made of magnet.

The thickness of linking part 71 in axial direction is being set as T3, is setting the thickness of the position detecting magnet 70 in axial direction It is set as T5 for T4, by the thickness of linking part 71 radially, when the thickness of position detecting magnet 70 radially is set as T6, turns Son 20 is configured to meet the relationship of T4 > T3 and T6 > T5.

In commutation polar form rotor 20, from the first pole parts 60 along the magnetic flux ratio axially leaked out from the second pole parts 61 It is big along the magnetic flux axially leaked out.Therefore because being detected along the magnetic flux axially leaked out by Hall IC 49b from the first pole parts 60 First magnetic field, the second pole parts of He Yincong 61 along the second magnetic field that the magnetic flux axially leaked out is detected by Hall IC 49b not Balance increases, and it is therefore possible to reduce the detection accuracy of rotation position.

As described above, the rotor 20 of embodiment 1 has: rotor core 5, has the first pole parts 60 With multiple second pole parts 61, first pole parts 60 are with multiple permanent magnets 1 and have produced by permanent magnet 1 The first polarity, second pole parts 61 be formed between adjacent permanent magnet 1 and have it is different from the first polarity Second polarity；With ringshaped magnet 72, it is set to the one end of the axial rotor core 5 of rotor core 5, ringshaped magnet 72 has Standby: multiple position detecting magnets 70, they are arranged along the direction of rotation of rotor core 5, for detecting the first of rotor core 5 The position of pole parts 60 and the second pole parts 61；With multiple linking parts 71, they are set to adjacent position detection magnetic It is between iron 70, adjacent position detecting magnet 70 is connected to each other.Moreover, for multiple position detecting magnets 70 and more For a linking part 71, the polarity of the magnetic pole of the end face 70b1 of the side opposite with rotor core 5 in the axial direction of rotor core 5 For polarity identical with the second polarity.According to this structure, it is examined from the second pole parts 61 along the magnetic flux axially leaked out from position Survey the magnetic flux auxiliary generated with magnet 70, thus with no position detecting magnet 70 the case where compared with, detected by Hall IC 49b The second magnetic field become biggish value.Thus the first magnetic field and the uneven of the second magnetic field are reduced.In addition in embodiment 1 In, as long as the polarity of the end face 70b1 of position detecting magnet 70 pole identical with the second polarity, is not limited to S Pole.That is, in the case where the second polarity of the second pole parts 61 is the pole N, the pole of the end face 70b1 of position detecting magnet 70 Property be the pole N.

By the phase on the direction of rotation of Hall IC 49b the first pole parts 60 and position detecting magnet 70 detected Unanimously, thus motor shown in FIG. 1 100 pass through using from the first pole parts 60 along the magnetic flux axially leaked out and from position With magnet 70 along the magnetic flux axially leaked out, thus, it is possible to accurately detect the position of rotor 20 for detection.

The rotor 20 of embodiment 1 uses the position detecting magnet 70 for being equivalent to the half quantity of summation of number of magnetic poles, Thus compared with the case where using position detecting magnet 70 for being equivalent to the quantity of summation of number of magnetic poles, position can be made to examine Survey the rising that precision improved and inhibited the manufacturing cost of rotor 20.

The motor 100 of further embodiments 1 uses ringshaped magnet 72, thus examines with multiple positions are separately manufactured Survey magnet 70 and the case where being assembled into rotor core 5, are compared, and the built-up time of rotor 20 can be shortened.Additionally by using ring Shape magnet 72 can reduce the risk that position detecting magnet 70 when rotor 20 assembles falls off and yield rate is caused to reduce, Jin Erneng Position detecting magnet 70 in the movement of motor 100 is enough reduced to fall off and disperse to the risk in motor 100.Therefore real The motor 100 for applying mode 1 inhibits the manufacturing cost of motor 100 to rise, and inhibits quality to reduce and can be improved position Detection accuracy.

In addition, following methods can be exemplified as the method that ringshaped magnet 72 is arranged to rotor core 5.

(1) flange shape component (not shown) is set between axis 23 and position detecting magnet 70, in addition in axis 23 and even Flange shape component (not shown) is set between knot 71, ringshaped magnet 72 thus is set to rotor core 5.

(2) at the one end 5a of rotor core 5 in the axial direction, setting is circumferentially separated multiple (not shown) of configuration Ringshaped magnet 72 is arranged in the pedestal group in seat.

The variation of the rotor 20 of embodiment 1 is illustrated below.

Figure 10 is the figure for indicating the first variation of commutation polar form rotor of the embodiments of the present invention 1.Figure 11 is The main view of rotor shown in Fig. 10.Figure 12 is the perspective view of ringshaped magnet shown in Fig. 10.

The difference of rotor 20A shown in Figure 10, Figure 11 and Figure 12 and rotor 20 shown in Fig. 7 are: linking part 71 Thickness radially it is different.Rotor 20A is configured to meet the relationship of T4 > T3 and T5=T6.Linking part 71 does not need auxiliary The function from the first pole parts 60 along the magnetic flux axially leaked out is helped, thus thickness T3, T5 of linking part 71 can be examined than position It surveys thin with thickness T4, T6 of magnet 70.Therefore the thickness with thickness T3, T5 and position detecting magnet 70 for making linking part 71 T4, T6 identical situation is compared, and can reduce the manufacturing cost of ringshaped magnet 72 without reducing position detection accuracy.In addition connect Thickness T3, T5 of knot 71 are to consider breakage when can prevent manufacture rotor 20,20A and can prevent electricity shown in FIG. 1 Damaged intensity when motivation 100 operates and set.

Figure 13 is the figure for indicating second variation of commutation polar form rotor of the embodiments of the present invention 1.Figure 14 is The main view of rotor shown in Figure 13.Figure 15 is the first perspective view of ringshaped magnet shown in Figure 13.Figure 16 is shown in Figure 13 Second perspective view of ringshaped magnet.

The difference of Figure 13, Figure 14 and rotor 20B shown in figure 15 and rotor 20 shown in Fig. 7 are: in rotor 20B Ringshaped magnet 72 be provided with the multiple protrusions 73 axially extended from ringshaped magnet 72.

As shown in Figure 15 and Figure 16, multiple protrusions 73 are respectively to be disposed in proximity in 70 circumferential direction of position detecting magnet Two end face 70a and the shape axially extending from another end face 70b2 lateral edge of the position detecting magnet 70 in axial direction. More specifically, two end face 70a in the circumferential direction of position detecting magnet 70 are provided with pedestal 74.Pedestal 74 is set to axis Another end face 70b2 of upward position detecting magnet 70.Protrusion 73 is set to pedestal 74, and be formed as in the axial direction to The side opposite with position detecting magnet 70 of pedestal 74 extends.Protrusion 73 and pedestal 74 by with ringshaped magnet 72 1 It is body formed and manufacture.

As shown in Figure 13 and Figure 14, multiple protrusions 73 are inserted into the second area 3B for constituting magnet insertion holes 2 respectively. Pedestal 74 is contacted with the one end 5a of rotor core 5 at this time, thus carries out the respective positioning of multiple protrusions 73 in axial direction.

In the motor 100 of present embodiment, by making the first pole parts 60 detected by Hall IC 49b and position The phase set on the direction of rotation of detection magnet 70 is consistent, thus it enables that the detection accuracy of rotation position improves.In Figure 13 In rotor 20B shown in~Figure 16, multiple protrusions 73 of second area 3B are inserted into as ringshaped magnet in a rotational direction 72 positioning protrusion and function.Therefore for rotor 20B, when assembling ringshaped magnet 72, it is able to suppress position inspection Survey the dislocation of the phase on the direction of rotation of the phase on the direction of rotation with magnet 70 and the second pole parts 61.Therefore with make It is compared with the motor 100 of rotor 20 or rotor 20A, the detection of rotation position can be made using the motor 100 of rotor 20B Precision improves.

In addition, rotor 20B can be manufactured by the way that protrusion 73 and pedestal 74 to be integrally formed with ringshaped magnet 72, therefore The feelings of rotor core 5 are assembled into separately position detecting magnet 70 and axially position component (not shown) is manufactured Condition is compared, and the built-up time of rotor 20 can be shortened, and additionally is able to reduce the number of components of manufacture, it is thus possible to improve finished product Rate inhibits the manufacturing cost of rotor 20B to rise.

Embodiment 2.

Figure 17 is the figure for indicating an example of structure for the air conditioner of the embodiments of the present invention 2.Air conditioner 300 Have indoor unit 310 and the outdoor unit connecting with indoor unit 310 320.Machine 310 used for indoor machine is sent equipped with (not shown) indoors Blower, in outdoor unit 320 equipped with outdoor unit pressure fan 330.In addition, in outdoor unit 320 equipped with compressor 340.In room The motor 100 of embodiment 1 is used in interior machine pressure fan, outdoor unit pressure fan 330 and compressor 340.

In this way, the motor 100 by using embodiment 1 is used as pressure fan used for indoor machine, outdoor unit pressure fan 330 And the driving source of compressor 340, thus the precision of rotation position detection improves, and improves motor efficiency simultaneously so as to obtain And it is able to suppress the air conditioner 300 of manufacturing cost.

In addition, the motor 100 of embodiment 1 can also be equipped on the electrical equipment other than air conditioner 300, in the situation Under can also obtain effect same as present embodiment.

Structure shown in above embodiment is an example for indicating the content of the utility model, also can be with other Well-known technique combination, in the range of not departing from the purport of the utility model, can also omit, change a part of structure.

Description of symbols: 1 ... permanent magnet；2 ... magnet insertion holes；The first area 3A ...；3B ... second area；5… Rotor core；5a ... one end；6 ... rotary shafts；7 ... shaft insertion holes；10 ... molded stators；10-1,41-1 ... peripheral part；10- 2,10a, 41-2 ... inner peripheral portion；The opening portion 10b ...；11,30a ... bearing support；11a, 405 ... holes；20,20A, 20B ... turn Son；21a ... load side rolling bearing；The anti-load side rolling bearing of 21b ...；23 ... axis；24 ... resin portions；26,26-1 ... insulate Sleeve；27 ... shaft assemblies；30 ... brackets；30b ... press-in portion；40 ... stators；41 ... stator cores；42 ... coils；43 ... insulation Portion；44b ... neutral terminal；45 ... substrates；46 ... conducting wire leads components；47 ... conducting wires；49b ... Hall IC；50 ... molding trees Rouge；60 ... first pole parts；61 ... second pole parts；62,63 ... poles center；The end 61a, 61b, 70a, 70b1,70b2 ... Face；64 ... interpolars；70 ... position detecting magnets；71 ... linking parts；72 ... ringshaped magnets；73 ... protrusions；74 ... pedestals； 100 ... motor；110 ... load sides；120 ... anti-load sides；300 ... air conditioners；310 ... indoor units；320 ... outdoor units； 330 ... outdoor unit pressure fan；340 ... compressors；400 ... segmentation cores；401 ... back yokes；402 ... teeth portion；403 ... thin-walleds Portion；404 ... divisional planes；406 ... slots.

Claims (17)

1. a kind of commutation polar form rotor, which is characterized in that have:

Rotor core, has the first pole parts and the second pole parts, and first pole parts have multiple permanent magnetics Iron simultaneously has the first polarity caused by the permanent magnet, and second pole parts are formed in the adjacent permanent magnet Between and have second polarity different from first polarity；With

Ringshaped magnet is set to the axial one end of the rotor core,

The ringshaped magnet has:

Multiple position detecting magnets, they are arranged along the direction of rotation of the rotor core, for detecting the rotor core First pole parts and second pole parts position；With

Multiple linking parts, they are set between the adjacent position detecting magnet, and the adjacent position detection is used Magnet is connected to each other,

For multiple position detecting magnets,

The polarity of the magnetic pole of the end face of the side opposite with the rotor core in the axial direction of the rotor core be with it is described The identical polarity of second polarity.

2. commutation polar form rotor according to claim 1, which is characterized in that

Phase and second magnetic pole piece of multiple position detecting magnet configurations in the direction of rotation of the rotor core The consistent position of phase for the direction of rotation divided.

3. commutation polar form rotor according to claim 1, which is characterized in that

Multiple position detecting magnets are mutual by the thickness linking part thinner than the thickness of the position detecting magnet Connection.

4. commutation polar form rotor according to claim 2, which is characterized in that

Multiple position detecting magnets are mutual by the thickness linking part thinner than the thickness of the position detecting magnet Connection.

5. commutation polar form rotor according to claim 1, which is characterized in that

The rotor core has multiple magnet insertion holes for permanent magnet insertion,

Multiple position detecting magnets have the protrusion for the positioning for carrying out the position detecting magnet,

The protrusion is inserted into the area being inserted between the permanent magnet of the magnet insertion holes and the magnet insertion holes Domain.

6. commutation polar form rotor according to claim 2, which is characterized in that

The rotor core has multiple magnet insertion holes for permanent magnet insertion,

Multiple position detecting magnets have the protrusion for the positioning for carrying out the position detecting magnet,

The protrusion is inserted into the area being inserted between the permanent magnet of the magnet insertion holes and the magnet insertion holes Domain.

7. commutation polar form rotor according to claim 3, which is characterized in that

The rotor core has multiple magnet insertion holes for permanent magnet insertion,

Multiple position detecting magnets have the protrusion for the positioning for carrying out the position detecting magnet,

The protrusion is inserted into the area being inserted between the permanent magnet of the magnet insertion holes and the magnet insertion holes Domain.

8. commutation polar form rotor according to claim 5, which is characterized in that

It is provided with pedestal between the position detecting magnet and the protrusion, the one end of the pedestal and the rotor core Contact.

9. the commutation polar form rotor according to any one of claim 3~8, which is characterized in that

The thickness of the position detecting magnet is bigger than the thickness of the linking part.

10. commutation polar form rotor described according to claim 1~any one of 8, which is characterized in that

The position detecting magnet is made of binding magnet.

11. commutation polar form rotor according to claim 9, which is characterized in that

The position detecting magnet is made of binding magnet.

12. a kind of motor, which is characterized in that

Have commutation polar form rotor and stator described in any one of claim 1~8.

13. a kind of motor, which is characterized in that

Have commutation polar form rotor and stator as claimed in claim 9.

14. a kind of motor, which is characterized in that

Have commutation polar form rotor and stator described in any one of claim 10.

15. a kind of motor, which is characterized in that

Have commutation polar form rotor and stator described in claim 11.

16. a kind of air conditioner, which is characterized in that

Has motor described in claim 12.

17. a kind of air conditioner, which is characterized in that

Has motor described in any one of claim 13~15.