CN102916510A - Rotary motor - Google Patents
Rotary motor Download PDFInfo
- Publication number
- CN102916510A CN102916510A CN2012102722304A CN201210272230A CN102916510A CN 102916510 A CN102916510 A CN 102916510A CN 2012102722304 A CN2012102722304 A CN 2012102722304A CN 201210272230 A CN201210272230 A CN 201210272230A CN 102916510 A CN102916510 A CN 102916510A
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- rotor core
- core
- electric rotating
- rotating machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The present invention provides a rotary motor, which can suppress the circumferential end portion of permanent magnet peripheral surface to produce irreversible demagnetization affected by demagnetizing field because of armature reaction. The motor (100) (the rotary motor) includes: a rotor core (22); stator teeth (11), which is configured to be relative to the outer circumferential portion of the rotor core (22); and permanent magnets (23a) (23b), which are arranged inside the rotor core (22) to extend from the inner peripheral portion side to the outer peripheral portion side. An end covered portion (22d) is arranged near the circumferential end portion covering the peripheral surface of the permanent magnets (23a) (23b). A gap (30) is arranged between the inner circumferential surface of the end covered portion (22d) and the outer circumferential surface of the permanent magnets (23a) (23b).
Description
Technical field
The present invention relates to a kind of electric rotating machine, relate in particular to the electric rotating machine that possesses the permanent magnet that extends at radial direction.
Background technology
In the past, known have an electric rotating machine (for example, with reference to patent documentation 1) that possesses the permanent magnet that extends at radial direction.
In above-mentioned patent documentation 1, disclose the rotor structure of permanent magnet motor (electric rotating machine), possess: pole pieces (rotor core); And magnet (permanent magnet), be set to extend at radial direction to the peripheral part side from interior perimembranous side in the inside of pole pieces.In this permanent magnet motor, covered by pole pieces being close under the state of pole pieces near the circumferential end of magnet outer peripheral face.
Patent documentation 1: the Unexamined Patent 1-144337 of Japan communique
Summary of the invention
But, in above-mentioned patent documentation 1 disclosed permanent magnet motor (electric rotating machine), owing under the state of being close to pole pieces (rotor core), being covered by pole pieces near the circumferential end of magnet (permanent magnet) outer peripheral face, therefore having near the problem that easily produces irreversible demagnetization because armature reaction is subject to the impact of demagnetizing field of circumferential end of magnet outer peripheral face.
The present invention carries out in order to solve above-mentioned problem, and 1 purpose of the present invention is, provides near the circumferential end of the outer peripheral face that can suppress permanent magnet the impact that is subject to demagnetizing field owing to armature reaction to produce the electric rotating machine of irreversible demagnetization.
In order to reach above-mentioned purpose, the electric rotating machine that a situation of the present invention relates to possesses: rotor core; Stator core is configured to relative with the peripheral part of rotor core; And permanent magnet, be set to extend at radial direction to the peripheral part side from interior perimembranous side in the inside of rotor core, peripheral part in rotor core, be provided with near the end coating section the circumferential end that covers the permanent magnet outer peripheral face, between the outer peripheral face of the inner peripheral surface of end coating section and permanent magnet, be provided with the space.
In the electric rotating machine that a situation of the present invention relates to, as mentioned above, peripheral part in rotor core arranges end coating section, covers near the circumferential end of permanent magnet outer peripheral face, between the outer peripheral face of the inner peripheral surface of end coating section and permanent magnet the space is set.Thus, near the circumferential end of permanent magnet outer peripheral face to be close to situation about being covered by rotor core under the state of rotor core different, can reduce near the circumferential end of permanent magnet outer peripheral face the contact area with rotor core.Its result, near the impact that can suppress the circumferential end of permanent magnet outer peripheral face to be subject to owing to armature reaction demagnetizing field produces irreversible demagnetization.
Description of drawings
Fig. 1 is the rotor of the motor that relates to from end on observation one embodiment of the present invention and the figure of stator.
Fig. 2 is the cutaway view along the 200-200 line of Fig. 1.
Fig. 3 be the motor that relates to of one embodiment of the present invention along with the cutaway view of the direction of rotor axial quadrature.
Fig. 4 be for the permanent magnet that the motor that one embodiment of the present invention relates to is described the amplification view of magnetic direction.
Fig. 5 is a plurality of core part of the motor that relates to of expression one embodiment of the present invention and the stereogram of the configuration relation between a plurality of permanent magnet.
Fig. 6 is the core part that relates to of the 1st variation of expression one embodiment of the present invention and the amplification view of permanent magnet.
Fig. 7 is the core part that relates to of the 2nd variation of expression one embodiment of the present invention and the amplification view of permanent magnet.
Fig. 8 is the core part that relates to of the 3rd variation of expression one embodiment of the present invention and the amplification view of permanent magnet.
Symbol description
11-stator tooth (stator core); 21-rotating shaft (rotary shaft); 21a-auxiliary section (the 1st auxiliary section); 22,122-rotor core; 22a, 22b, 122a, 122b-core part; 22d, 122d-end coating section; 23a, 23b, 123a, 123b-permanent magnet; The 24-plate; 24b-auxiliary section (the 2nd auxiliary section); 30,31,32-space; 40,42,44-bond layer (nonmagnetic substance); 43-spacer member (nonmagnetic substance); 100-motor (electric rotating machine).
Embodiment
Below, with reference to the accompanying drawings embodiments of the present invention are described.
The formation of the motor 100 that at first, one embodiment of the present invention is related to reference to Fig. 1～Fig. 5 describes.
As shown in Figures 1 and 2, to possess fixed part be that stator 1 and rotating part are rotor 2 to motor 100.In addition, motor 100 is an example of " electric rotating machine " of the present invention.
As shown in Figure 1, stator 1 is made of stator tooth 11, winding 12, stator yoke 13.Stator tooth 11 is configured to across the space (gap 3) of regulation relative with the peripheral part of the rotor core described later 22 of rotor 2.And, be formed with a plurality of (being in the present embodiment 12) groove 14 in the inboard of stator tooth 11.In addition, stator tooth 11 is an example of " stator core " of the present invention.
A plurality of grooves 14 configure by equal angles interval roughly (be in the present embodiment approximately 30 ° interval) along the direction of rotation of rotor 2 (hereinafter referred to as circumferentially).Winding 12 is accommodated in respectively the inside of a plurality of grooves 14.Stator yoke 13 is set to surround the peripheral part of stator tooth 11.
Such as Fig. 1～shown in Figure 3, rotor 2 is made of rotating shaft 21, rotor core 22, a plurality of permanent magnet 23a and 23b, plate 24.Rotating shaft 21 is set to run through the center of rotor 2, extends at directions X (with reference to Fig. 2) (hereinafter referred to as axially).Rotor core 22 is set to surround rotating shaft 21.And rotor core 22 is formed by a plurality of electromagnetic steel plates (with reference to Fig. 2) of lamination in the axial direction.In addition, rotating shaft 21 is an example of " rotary shaft " of the present invention.
At this, in the present embodiment, such as Fig. 3～shown in Figure 5, rotor core 22 is by consisting of as a plurality of (being in the present embodiment 5) core part 22a of the N utmost point performance function of rotor 2 and a plurality of (being in the present embodiment 5) core part 22b as the S utmost point performance function of rotor 2.As shown in Figure 3, these a plurality of core part 22a and 22b are along circumferentially interconnected singly by roughly equal angles interval (being roughly in the present embodiment 36 ° interval).And near the circumferential central portion the separately peripheral part of a plurality of core part 22a and 22b is formed with the pin insertion hole 22c that is inserted by pin 50 described later.
And, in the present embodiment, such as Fig. 3～shown in Figure 5, at a plurality of core part 22a(22b) the circumferential both ends of separately peripheral part, be provided with at the week outstanding 22d of end coating section upwards.The 22d of end coating section is formed, across bond layer 40(described later with reference to Fig. 3 and Fig. 4) cover and core part 22a(22b) the permanent magnet 23a(23b of adjacency) the circumferential end of outer peripheral face near near the end of (core part 22a(22b) side).And the coating 22d of section in end is formed along core part 22a(22b) periphery upwards extend in week.
Such as Fig. 3～shown in Figure 5, permanent magnet 23a and 23b are arranged between core part 22a and the 22b, not across core part 22a and 22b in the adjacency that makes progress in week.And such as Fig. 1～shown in Figure 5, the radial direction that permanent magnet 23a and 23b are formed in from the interior perimembranous side of rotor core 22 to the peripheral part side extends.In addition, as shown in Figures 3 and 4, the part of the inner peripheral surface of permanent magnet 23a and 23b is configured to contact the outer peripheral face of rotating shaft 21.
At this, in the present embodiment, such as Fig. 3～shown in Figure 5, the outer peripheral face of permanent magnet 23a and 23b is configured in such as upper/lower positions, do not contact the inner peripheral surface of the 22d of end coating section of core part 22a and 22b, in the position that the inner peripheral surface than the end coating 22d of section leaves to the inboard of radial direction.That is, the inner peripheral surface of the outer peripheral face of permanent magnet 23a and 23b and the end coating 22d of section leaves in the circumferential total length of the end coating 22d of section.Thus, be provided with space 30 near the end of the core part 22a side of the outer peripheral face of permanent magnet 23a and between the inner peripheral surface of the 22d of end coating section of core part 22a.Equally, also be provided with space 30 near the end of the core part 22b side of the outer peripheral face of permanent magnet 23b and between the inner peripheral surface of the 22d of end coating section of core part 22b.
As shown in Figures 3 and 4, space 30 is following formation, by making permanent magnet 23a(23b) the core part 22a(22b of outer peripheral face) near the end of side with core part 22a(22b) the inner peripheral surface of the 22d of end coating section leave in the circumferential total length of the end coating 22d of section and form.In addition, the length l (with reference to Fig. 4) of the radial direction in preferred this space 30 is set in approximately more than the 0.5mm, and is from permanent magnet 23a(23b) inner peripheral surface to the approximately length below 10/l of the length L (with reference to Fig. 4) of the radial direction of the inner peripheral surface of the end coating 22d of section.And, as shown in Figure 5, space 30 is following formation, by making permanent magnet 23a(23b) the core part 22a(22b of outer peripheral face) near the end of side with core part 22a(22b) the inner peripheral surface of the 22d of end coating section at core part 22a(22b) entire axial length leave and form.
And such as Fig. 2～shown in Figure 4,30 inside is filled with the bond layer 40 that the bonding agent by nonmagnetic substance consists of in the space.Thus, as shown in Figures 3 and 4, permanent magnet 23a(23b) the core part 22a(22b of outer peripheral face) covered by bond layer 40 near the end of side.And, such as Fig. 3～shown in Figure 5, the permanent magnet 23a(23b that is not covered by bond layer 40) the part (part that is not covered by the end coating 22d of section) of outer peripheral face to stator 1(with reference to Fig. 1) side exposes.In addition, although Fig. 5 is a plurality of core part 22a(22b that expression consists of rotor core 22) with a plurality of permanent magnet 23a(23b that are arranged on rotor core 22 inside) stereogram, for convenience of explanation, do not illustrate bond layer 40.
And, in the present embodiment, such as Fig. 2～shown in Figure 4, identical with the inside in space 30, at inner peripheral surface (core part 22a(22b) and the permanent magnet 23a(23b of rotor core 22) inner peripheral surface) and the outer peripheral face of rotating shaft 21 between formed interior volume also be filled with the bond layer 41 that is consisted of by bonding agent.In addition, although in Fig. 2～Fig. 4, do not illustrate, at the circumferential permanent magnet 23a(23b of adjacency) and core part 22a(22b) between the gap or also be filled with bond layer in the permanent magnet 23a of circumferential adjacency and the gap between the permanent magnet 23b etc.
As shown in Figures 3 and 4, permanent magnet 23a and 23b form, and have circumferential width from rotor core 22( core part 22a and 22b) interior perimembranous become gradually large square-section to peripheral part.And, as shown in Figure 4, permanent magnet 23a(23b) forms with lower corner and become the right angle, be permanent magnet 23a(23b) the end of peripheral part side of rotor core 22 in abutting connection with core part 22a(22b) the bight, and permanent magnet 23a(23b) the end of interior perimembranous side of rotor core 22 in abutting connection with permanent magnet 23b(23a) the bight.
And as shown in Figure 4, permanent magnet 23a and 23b are for magnetic with only the tilt direction of predetermined angular θ of the direction (arrow A direction) of q axle (with the axle that becomes 90 ° of electrical degree directions along the axle (d axle) of the main flux direction) quadrature of motor 100.Be specially, in abutting connection with the permanent magnet 23a of core part 22a for magnetic with the direction (arrow A direction) of q axle quadrature to only the tilt direction of predetermined angular θ of outer circumferential side, on the other hand, the permanent magnet 23b in abutting connection with core part 22b magnetic in the direction of the predetermined angular θ that only tilts for the inside all sides of direction (arrow A direction) with q axle quadrature.That is, between core part 22a and core part 22b circumferentially the permanent magnet 23a of adjacency and permanent magnet 23b magnetic direction roughly be the line symmetry for the q axle.
In addition, such as Fig. 1 and shown in Figure 4, the q axle of the motor 100 that present embodiment relates to is consistent with the line that permanent magnet 23b contacts with the permanent magnet 23a of circumferential adjacency.And, at the core part 22a that represents with Fig. 4 during as the benchmark magnetic pole, the q axle of the motor 100 that present embodiment relates to is consistent with following connection straight line (pole boundary line), namely connects the pivot O(of rotor 2 with reference to Fig. 1) and benchmark magnetic pole and the circumferential straight line of the magnetic boundary between the magnetic pole (core part 22b shown in Figure 4) of adjacency.
In the present embodiment, above-mentioned permanent magnet 23a(23b) the tilt angle theta of magnetic direction be set in the scope of 0 °＜θ≤45 °.Thus, with make permanent magnet 23a(23b) comparing with the situation that the direction (arrow A direction (with reference to Fig. 4)) of q axle quadrature magnetic, owing to can increase along permanent magnet 23a(23b) the thickness of magnetic direction, so can be with permanent magnet 23a(23b) operating point improve.In addition, even when the number of magnetic poles (number of core part 22a and 22b (being in the present embodiment 10)) of change motor 100, this angle θ also preferably sets at certain scope (0 °＜θ≤45 °).
In addition, as shown in Figure 2, permanent magnet 23a is formed, and is configured in from axial both sides and clips rotor core 22 and permanent magnet 23a(23b) 2 blocks of plates 24 between, extend in the axial direction simultaneously.And as shown in Figure 5, permanent magnet 23b also is formed with permanent magnet 23a and similarly extends in the axial direction.Such as Fig. 2 and shown in Figure 5, the axial length of permanent magnet 23a and 23b be formed with the axial length of rotor core 22 about equally.
As shown in Figures 1 and 2, plate 24 forms when having from end on observation tabular for toroidal roughly.This plate 24 is formed by the nonmagnetic substance of stainless steel, resin etc.In addition, as shown in Figure 1, the diameter of plate 24 forms littlely than the external diameter of rotor 2.And as shown in Figure 2, plate 24 is formed and covers rotor core 22 and permanent magnet 23a(23b) axial both ends of the surface, these both ends of the surface are exposed.
And as shown in Figure 1, near the interior perimembranous (central portion) of plate 24 is provided with the rotating shaft insertion section 24a that is made of opening.Be formed with the auxiliary section 24b of gear-like at this rotating shaft insertion section 24a.At this, in the part (with reference to Fig. 2) that exceeds in the axial direction from rotor core 22 of the outer peripheral face of rotating shaft 21, be formed with the auxiliary section 21a corresponding to the gear-like (with reference to Fig. 1) of the auxiliary section 24b of plate 24.In the present embodiment, the gear-like auxiliary section 24b by plate 24 cooperates (engagement) with the auxiliary section 21a of the gear-like of rotating shaft 21, thereby plate 24 is fixed with rotating shaft 21.In addition, auxiliary section 21a is an example of " the 1st auxiliary section " of the present invention, and auxiliary section 24b is an example of " the 2nd auxiliary section " of the present invention simultaneously.
And near the peripheral part of plate 24, be provided with a plurality of (being in the present embodiment 10) pin insertion hole 24c, it is corresponding to core part 22a(22b) pin insertion hole 22c.Equal angles interval (being about in the present embodiment 36 ° interval) arranges these a plurality of pin insertion hole 24c along circumferentially pressing roughly near the peripheral part of plate 24.As shown in Figure 2, at pin insertion hole 24c and the core part 22a(22b of this plate 24) the inside of pin insertion hole 22c, be inserted with the columned pin 50 that extends in the axial direction.
Below, with reference to Fig. 1～Fig. 5, the assembly process of the rotor 2 of the motor 100 that one embodiment of the present invention is related to describes.
At first, such as Fig. 3～shown in Figure 5, by with a plurality of core part 22a and a plurality of core part 22b interconnected singly be circle-shaped, thereby the outer peripheral face at rotating shaft 21 consists of rotor core 22, in the inside of rotor core 22, be installed in a plurality of permanent magnet 23a and the 23b that extend in the axial direction when extending on the radial direction.Be specially, as shown in Figures 3 and 4, the following inside that permanent magnet 23a and 23b is installed in rotor core 22, core part 22a(22b) inner peripheral surface and the permanent magnet 23a(23b of the 22d of end coating section) outer peripheral face leave the outer peripheral face of the simultaneously inner peripheral surface of permanent magnet 23a and 23b contact rotating shaft 21 in the circumferential total length of the end coating 22d of section.Then, at permanent magnet 23a(23b) the core part 22a(22b of outer peripheral face) near the end of side and core part 22a(22b) the inner peripheral surface of the 22d of end coating section between the inside in formed space 30 fill bond layer 40.And, at inner peripheral surface (core part 22a(22b) and the permanent magnet 23a(23b of rotor core 22) inner peripheral surface) and the outer peripheral face of rotating shaft 21 between formed interior volume also fill bond layer 41.In addition, at this moment, at the circumferential permanent magnet 23a(23b of adjacency) with core part 22a(22b) between the gap or also fill bond layer (not shown) in the permanent magnet 23a of circumferential adjacency and the gap between the permanent magnet 23b etc.
Below, as shown in Figure 2, aforesaid rotor core 22, permanent magnet 23a(23b are being installed) rotating shaft 21 on, discoideus plate 24 is installed from axial both sides.Be specially, at first, insert rotating shaft 21 at the rotating shaft insertion section of plate 24 interior perimembranous 24a.Then, as shown in Figure 1, the auxiliary section 21a by making the gear-like that is arranged on rotating shaft 21 peripheral parts and the auxiliary section 24b of gear-like that is arranged on the rotating shaft insertion section 24a of plate 24 cooperate, thus fixedly rotating shaft 21 and plate 24.In addition, make pin insertion hole 24c and the core part 22a(22b of plate 24 this moment) the position consistency of pin insertion hole 22c.
At last, as shown in Figure 2, at pin insertion hole 24c and the core part 22a(22b of the plate 24 that makes as mentioned above position consistency) pin insertion hole 22c in, will sell 50 and insert in the axial direction, thus fixed head 24 and core part 22a(22b).So, carry out the assembling of the rotor 2 of the motor 100 that one embodiment of the present invention relates to.
In the present embodiment, as mentioned above, the 22d of end coating section is arranged on rotor core 22(core part 22a(22b)) peripheral part, cover permanent magnet 23a(23b) near the circumferential end of outer peripheral face near the end of (core part 22a(22b) side), at inner peripheral surface and the permanent magnet 23a(23b of the end coating 22d of section) outer peripheral face between space 30 is set.Thus, from permanent magnet 23a(23b) near situation about being covered by rotor core 22 under the state of being close to rotor core 22 circumferential end of outer peripheral face is different, can reduce permanent magnet 23a(23b) near the circumferential end of outer peripheral face and the contact area of rotor core 22.Its result can suppress permanent magnet 23a(23b) near be subject to demagnetizing field owing to armature reaction the circumferential end of outer peripheral face impact produces irreversible demagnetization.
And, in the present embodiment, as mentioned above, permanent magnet 23a and 23b are formed its circumferential width become gradually large from the interior perimembranous side direction peripheral part side of rotor core 22.Thus, because the circumferential width of the permanent magnet 23a of rotor core 22 peripheral part sides and the end of 23b becomes large part, can make the thickness along magnetic direction (direction that intersects with the q axle of motor 100) of the end of the permanent magnet 23a of peripheral part side of rotor core 22 and 23b become large, so can improve the operating point of permanent magnet 23a and 23b.Its result, the output that can improve motor 100 can suppress simultaneously because armature reaction and easily be subject to the irreversible demagnetization of the end of the permanent magnet 23a of peripheral part side of rotor core 22 of demagnetizing field impact and 23b.And, because the part that the circumferential width of the permanent magnet 23a of rotor core 22 interior perimembranous sides and the end of 23b diminishes, the permanent magnet 23a of contact rotor core 22 interior perimembranous and the surface area of 23b are increased, so can further improve the output of motor 100.
And, in the present embodiment, as mentioned above, permanent magnet 23a and 23b formed have circumferential width and become gradually large square-section from the interior perimembranous of rotor core 22 to peripheral part.Thus, with (for example permanent magnet 23a and 23b are formed the shape that has beyond the rectangle, circumferential width becomes large fan shape from the interior perimembranous of rotor core 22 gradually to peripheral part) the situation in cross section compare, can easily make circumferential width and become gradually large permanent magnet 23a and 23b from the interior perimembranous of rotor core 22 to peripheral part.
And, in the present embodiment, as mentioned above, upwards extend by the coating 22d of section in end being formed in week, and make inner peripheral surface and the permanent magnet 23a(23b of the 22d of end coating section) outer peripheral face leave in the circumferential total length of the end coating 22d of section, thereby consist of space 30.Thus, because can further reduce permanent magnet 23a(23b) near the circumferential end of outer peripheral face with the contact area of rotor core 22, so can further suppress permanent magnet 23a(23b) near be subject to demagnetizing field owing to armature reaction the circumferential end of outer peripheral face impact produces irreversible demagnetization.
And in the present embodiment, as mentioned above, nonmagnetic substance (bond layer 40) is filled in 30 inside in the space.Thus, can reduce permanent magnet 23a(23b) leakage flux in, suppress because the centrifugal force during rotor 2 rotation causes permanent magnet 23a(23b) be offset at radial direction.And, be the bond layer 40 of nonmagnetic substance by use, can be with permanent magnet 23a(23b) be bonded in the inside of rotor core 22, therefore can further suppress because the centrifugal force during rotor 2 rotation causes permanent magnet 23a(23b) be offset at radial direction.
And, in the present embodiment, as mentioned above, make permanent magnet 23a and 23b for the direction of q axle quadrature on only the tilt direction of predetermined angular θ magnetic.Thus, comparing with the situation that the direction (arrow A direction (with reference to Fig. 4)) of q axle quadrature magnetic with making permanent magnet 23a and 23b, because can further increase the thickness along magnetic direction of permanent magnet 23a and 23b, so can further improve the operating point of permanent magnet 23a and 23b.Its result, the output that can further improve motor 100, the while can further be suppressed the irreversible demagnetization of permanent magnet 23a and 23b.And, by make permanent magnet 23a and 23b magnetic direction for tilting with the direction (arrow A direction) of q axle quadrature, smooth and easy the carrying out of variation of the magnetic flux that gap in the time of can making rotor core 22 rotation between rotor core 22 and stator tooth 11 3 is mobile.Its result can reduce the cogging torque of motor 100.
And, in the present embodiment, as mentioned above, with permanent magnet 23a and 23b the tilt angle theta of magnetic direction be set in the scope of 0 °＜θ≤45 °.By angle θ is set in this angular range, can easily make the thickness along magnetic direction of permanent magnet 23a and 23b become large, smooth and easy the carrying out of variation of the magnetic flux that flows in the gap 3 in the time of can making rotor core 22 rotation simultaneously between rotor core 22 and stator tooth 11.
And, in the present embodiment, as mentioned above, rotor core 22 constituted be included in week upwards across a plurality of core part 22a and the 22b of arranged spaced, permanent magnet 23a and 23b are configured to, between the core part 22a and 22b of adjacency, the inner peripheral surface of permanent magnet 23a and 23b contacts the outer peripheral face of rotating shaft 21 in a plurality of core part 22a and 22b.Thus, because rotor core 22 is separated into individual other fully and is being made progress in week across a plurality of core part 22a and the 22b of arranged spaced, so to be formed in the continuous situation of peripheral part or interior perimembranous different from rotor core 22, the part that can suppress the magnetic flux that produces from permanent magnet 23a and 23b does not circulate by the peripheral part of rotor core 22 or the continuous part of interior perimembranous to stator tooth 11 side flow.Its result can reduce leakage flux, the output that therefore can further improve motor 100.
And, in the present embodiment, as mentioned above, permanent magnet 23a and 23b are configured between the core part 22a and 22b of adjacency, make the outer peripheral face of the inner peripheral surface contact rotating shaft 21 of permanent magnet 23a and 23b, expose simultaneously the part (part that is not covered by bond layer 40) that is not covered by the end coating 22d of section of permanent magnet 23a and 23b outer peripheral face.Thus, by the end coating 22d of section, can suppress because rotor core 22( core part 22a and 22b) centrifugal force during rotation causes permanent magnet 23a and 23b to break away to outer circumferential side.
And, because by cover permanent magnet 23a(23b with the end 22d of coating section) the core part 22a(22b of outer peripheral face) part of side, can increase the area in the zone that the magnetic flux that flows to stator tooth 11 sides on rotor core 22 outer peripheral faces passes through, therefore can further make rotor core 22( core part 22a and 22b) during rotation at rotor core 22( core part 22a and 22b) with smooth and easy the carrying out of variation of the mobile magnetic flux in the gap 3 between the stator tooth 11.Thus, can further reduce the cogging torque of motor 100.And, expose by the part that is not covered by the end coating 22d of section that makes permanent magnet 23a and 23b outer peripheral face, compare with the situation with the part that is not covered by the end coating 22d of section of the covering permanent magnet 23a such as magnetic and 23b outer peripheral face, can further reduce leakage flux.Its result, the output that can further improve motor 100.
And, in the present embodiment, as mentioned above, 2 permanent magnet 23a and 23b are configured between 2 the core part 22a and 22b of adjacency, in week upwards not across core part 22a and 22b and adjacency.Thus, from make permanent magnet 23a and 23b different across the situation of core part 22a or 22b adjacency, because total distance in the space of the field circuit that is made of permanent magnet 23a and permanent magnet 23b is diminished, so can improve the operating point of permanent magnet 23a and 23b.Its result, the output that can further improve motor 100, the while can further be suppressed the irreversible demagnetization of permanent magnet 23a and 23b.
And in the present embodiment, as mentioned above, rotor core 22 is made of a plurality of electromagnetic steel plates of lamination in the axial direction, and the plate 24 that is installed in the rotating shaft 21 of rotor core 22 interior perimembranous and is installed as the axial end that covers rotor core 22 is set.And at the peripheral part formation auxiliary section 21a of rotating shaft 21, the interior perimembranous at plate 24 forms the auxiliary section 24b that cooperates with the auxiliary section 21a of rotating shaft 21 simultaneously.Thus, cooperate with the auxiliary section 24b of plate 24 by the auxiliary section 21a that makes rotating shaft 21, can firmly fix plate 24 and rotating shaft 21.
In addition, it all is illustration that current disclosed execution mode should be considered to aspect all, is not restrictive execution mode.Scope of the present invention is not the explanation of above-mentioned execution mode, but is represented by the scope of patented technology scheme, but also comprises the meaning that equates with the scope of patented technology scheme and all changes in scope.
For example, in the above-described embodiment, although represented only to arrange in the outer peripheral face side (between the inner peripheral surface of the outer peripheral face of permanent magnet and end coating section) of permanent magnet the example in space, the present invention is not limited to this.In the present invention, also can the space be set the both sides of the outer peripheral face side of permanent magnet and the inner peripheral surface side of permanent magnet (between the inner peripheral surface of permanent magnet and the outer peripheral face of rotary shaft).
And, in the above-described embodiment, having circumferential width becomes large square-section gradually from the interior perimembranous side direction peripheral part side of rotor core example although represented permanent magnet formed, the present invention is not limited to this.In the present invention, also permanent magnet can be formed and have circumferential width and become gradually large sector crosssection from the interior perimembranous of rotor core to peripheral part.And, in the present invention, also permanent magnet can be formed and have circumferential width in rectangle cross section that the interior perimembranous side of rotor core equates with the peripheral part side.
And, in the above-described embodiment, as shown in Figures 3 and 4, although represented by making inner peripheral surface and the permanent magnet 23a(23b of the 22d of end coating section) outer peripheral face leave the example that consists of space 30 in the circumferential total length of the end coating 22d of section, the present invention is not limited to this.In the present invention, the 1st variation that also can be as shown in Figure 6 is such, makes inner peripheral surface and the permanent magnet 23a(23b of the 122d of end coating section) outer peripheral face leave in the circumferential total length of the end coating 122d of section.
In this 1st variation, as shown in Figure 6, consist of the core part 122a(122b of rotor core 122) the inner peripheral surface of the 122d of end coating section be formed concaveconvex shape, have contact (butt) permanent magnet 23a(23b) part (apex 122e) of outer peripheral face.And, at part (side surface part 122f) and the permanent magnet 23a(23b beyond the apex 122e of the inner peripheral surface of the 122d of end coating section that is formed concaveconvex shape) outer peripheral face between the inside in formed space (space 31), be filled with the bond layer 42 that the bonding agent by nonmagnetic substance consists of.
In the 1st variation, by making apex 122e contact (butt) permanent magnet 23a(23b of the end 122d of coating section inner peripheral surface) outer peripheral face, be not only bond layer 42, can also pass through part fixed permanent magnet 23a(23b on radial direction of its butt), therefore can further suppress permanent magnet 23a(23b) be offset at radial direction.And, by side surface part 122f and the permanent magnet 23a(23b at the end coating 122d of section inner peripheral surface) outer peripheral face between space 31 is set, can suppress permanent magnet 23a(23b) near the circumferential end of outer peripheral face irreversible demagnetization.Its result can suppress permanent magnet 23a(23b) when radial direction is offset, suppress permanent magnet 23a(23b) near the circumferential end of outer peripheral face irreversible demagnetization.
And, in the above-described embodiment, as shown in Figures 3 and 4, although represented to cover permanent magnet 23a(23b by 40 of the bond layers of nonmagnetic substance) the core part 22a(22b of outer peripheral face) near the end of side example, the present invention is not limited to this.In the present invention, also can cover permanent magnet 23a(23b by bond layer 40) whole of outer peripheral face.And in the present invention, the 2nd variation that also can be as shown in Figure 7 is such, covers permanent magnet 23a(23b by tabular spacer member 43) whole of outer peripheral face.
In this 2nd variation, as shown in Figure 7, the inner peripheral surface of tabular spacer member 43 is configured to cover permanent magnet 23a(23b) whole of outer peripheral face.And the circumferential both ends of spacer member 43 embed the inside in space 30, and space 30 is positioned at core part 22a(22b) the core part 22a(22b of inner peripheral surface and the outer peripheral face of permanent magnet 23a and 23b of the 22d of end coating section) between the end of side is neighbouring.In addition, spacer member 43 is made of the resin of nonmagnetic substance.
In the 2nd variation, by 30 inside arranges tabular spacer member 43 in the space, covering permanent magnet 23a(23b) whole of outer peripheral face, be not only permanent magnet 23a(23b) part that is covered by the end coating 22d of section of outer peripheral face, the part that is not covered by the end coating 22d of section also can be spaced apart member 43 and cover, and therefore can more effectively suppress permanent magnet 23a(23b) be offset at radial direction.
And, in the above-described embodiment, as shown in Figures 3 and 4, although represented the example in following formation space 30, namely by having the permanent magnet 23a(23b in the square-section that radial direction extends) outer peripheral face be configured in the position that the inner peripheral surface than the end coating 22d of section leaves to the inboard of radial direction and consist of, but the present invention is not limited to this.In the present invention, also can the 3rd variation as shown in Figure 8 consist of like that space 32, namely, core part 22a(22b in the end of rotor core 22 peripheral part sides permanent magnet 123a(123b)) the bight chamfering of side is by this permanent magnet 123a(123b) be configured between core part 22a and the core part 22b and consist of space 32.In this 3rd variation, as shown in Figure 8, at permanent magnet 123a(123b) the outer peripheral face of chamfered part 123c and the inner peripheral surface of the end coating 22d of section between inside, formed space (space 32), be filled with the bond layer 44 that the bonding agent by nonmagnetic substance consists of.
And in the above-described embodiment, although represented to make permanent magnet the example of magnetic in the direction that tilts for the direction with the q axle quadrature of motor (electric rotating machine), the present invention is not limited to this.In the present invention, also can make permanent magnet magnetic with the direction of the q axle quadrature of electric rotating machine.
And in the above-described embodiment, although represented to be made of a plurality of core part the example of rotor core, the present invention is not limited to this.In the present invention, also can rotor core be consisted of as parts by the interior perimembranous that connects a plurality of core part.
And, in the above-described embodiment, becoming gradually the example of large 2 permanent magnets from the interior perimembranous of rotor core to peripheral part although represented configuration circumferential width between 2 core part of adjacency in a plurality of core part, the present invention is not limited to this.In the present invention, both can make the permanent magnet between 2 core part that are configured in adjacency is 1, also can be for more than 3.
And, in the above-described embodiment, although represented the rotary shaft with rotating shaft 21() auxiliary section 21a(the 1st auxiliary section of peripheral part) with auxiliary section 24b(the 2nd auxiliary section of plate 24 interior perimembranous) example of formative gear shape, the present invention is not limited to this.In the present invention, also can be with the shape beyond the 1st auxiliary section and the 2nd auxiliary section formative gear shape.
Claims (13)
1. an electric rotating machine is characterized by, and possesses:
Rotor core;
Stator core is configured to relative with the peripheral part of described rotor core;
And permanent magnet, be set to extend at radial direction to the peripheral part side from interior perimembranous side in the inside of described rotor core,
At the peripheral part of described rotor core, be provided with near the end coating section of circumferential end of the outer peripheral face that covers described permanent magnet,
Between the outer peripheral face of the inner peripheral surface of described end coating section and described permanent magnet, be provided with the space.
2. electric rotating machine according to claim 1 is characterized by,
Described permanent magnet is formed its circumferential width and becomes gradually large from the interior perimembranous side direction peripheral part side of described rotor core.
3. electric rotating machine according to claim 2 is characterized by,
Described permanent magnet is formed has its circumferential width becomes large essentially rectangular gradually from the interior perimembranous side direction peripheral part side of described rotor core cross section.
4. any 1 described electric rotating machine is characterized by according to claim 1～3,
Described end coating section is formed in upwards extends in week,
Inner peripheral surface by making described end coating section and the outer peripheral face of described permanent magnet leave in the circumferential total length of described end coating section, thereby consist of described space.
5. any 1 described electric rotating machine is characterized by according to claim 1～4,
Inside in described space is filled with nonmagnetic substance.
6. electric rotating machine according to claim 5 is characterized by,
Described nonmagnetic substance comprises bond layer.
7. any 1 described electric rotating machine is characterized by according to claim 1～6,
Described permanent magnet magnetic in the direction that the q axle with described electric rotating machine intersects.
8. electric rotating machine according to claim 7 is characterized by,
Described permanent magnet magnetic in the direction of the predetermined angular θ that only tilts for the direction with described q axle quadrature.
9. electric rotating machine according to claim 8 is characterized by,
Described predetermined angular θ is set in the scope of 0 °＜θ≤45 °.
10. any 1 described electric rotating machine is characterized by according to claim 1～9,
Also possess the rotary shaft of installing in the interior perimembranous of described rotor core,
Described rotor core constitutes to be included in and makes progress in week across a plurality of core part of arranged spaced,
Described permanent magnet is configured to, and between the core part of adjacency, the inner peripheral surface of described permanent magnet contacts the outer peripheral face of described rotary shaft in described a plurality of core part.
11. electric rotating machine according to claim 10 is characterized by,
Described permanent magnet is configured to, in described a plurality of core part between the core part of adjacency, the inner peripheral surface of described permanent magnet contacts the outer peripheral face of described rotary shaft, exposes simultaneously the part that is not covered by described end coating section of the outer peripheral face of described permanent magnet.
12. according to claim 10 or 11 described electric rotating machines, it is characterized by,
Described permanent magnet is configured to, and between the core part of adjacency, 2 described permanent magnets are not across described core part and in the adjacency that makes progress in week in described a plurality of core part.
13. any 1 described electric rotating machine is characterized by according to claim 1～12,
Described rotor core is made of a plurality of electromagnetic steel plates of lamination in the axial direction, also possesses:
Rotary shaft is installed in the interior perimembranous of described rotor core;
And plate, be installed to be and surround described rotary shaft, cover simultaneously the axial end of the rotor core that is consisted of by described a plurality of electromagnetic steel plates,
Peripheral part at described rotary shaft is formed with the 1st auxiliary section,
In the interior perimembranous of described plate, be formed with the 2nd auxiliary section that cooperates with described the 1st auxiliary section of described rotary shaft.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011169542A JP5429241B2 (en) | 2011-08-02 | 2011-08-02 | Rotating electric machine |
| JP2011-169542 | 2011-08-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102916510A true CN102916510A (en) | 2013-02-06 |
Family
ID=47614780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102722304A Pending CN102916510A (en) | 2011-08-02 | 2012-08-01 | Rotary motor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5429241B2 (en) |
| CN (1) | CN102916510A (en) |
| BR (1) | BR102012019289A2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426268A (en) * | 2013-09-03 | 2015-03-18 | 爱信精机株式会社 | Electric motor |
| CN104300711B (en) * | 2013-07-17 | 2016-08-24 | 株式会社日立制作所 | Wheel spoke type electric motor and the Winch for elevator of use wheel spoke type electric motor |
| CN106549515A (en) * | 2015-09-18 | 2017-03-29 | 株式会社安川电机 | Electric rotating machine |
| CN107666192A (en) * | 2016-07-29 | 2018-02-06 | 艾塔尔公司 | Rotor for syncmotor |
| CN114157066A (en) * | 2020-09-07 | 2022-03-08 | 日立金属株式会社 | Rotating electrical machine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102517688B1 (en) * | 2015-11-16 | 2023-04-04 | 엘지이노텍 주식회사 | Rotor assembly and motor having the same |
| US11146134B2 (en) | 2017-03-06 | 2021-10-12 | Meidensha Corporation | Insulating structure of ventilation path of salient-pole rotor |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0336939A (en) * | 1989-06-29 | 1991-02-18 | Fanuc Ltd | Radial rotor structure |
| JPH0588165U (en) * | 1992-04-24 | 1993-11-26 | オークマ株式会社 | Electric motor rotor |
| US5378953A (en) * | 1992-06-08 | 1995-01-03 | Fanuc Ltd. | Rotor for synchronous motor |
| CN1375122A (en) * | 1999-09-20 | 2002-10-16 | 埃科艾尔公司 | Permanent magnet rotor portion for electric machines |
| JP2002369425A (en) * | 2001-06-12 | 2002-12-20 | Nishishiba Electric Co Ltd | Permanent magnet rotor |
| US20040095033A1 (en) * | 2002-11-15 | 2004-05-20 | Popov Vladimir Vladimirovich | Rotor assembly for a permanent magnet electrical machine comprising such a rotor assembly |
| JP2008067574A (en) * | 2006-09-11 | 2008-03-21 | Yaskawa Electric Corp | Embedded magnet type motor |
| JP2009177944A (en) * | 2008-01-24 | 2009-08-06 | Calsonic Kansei Corp | Motor |
| CN102067411A (en) * | 2008-06-16 | 2011-05-18 | 利莱森玛发电机有限公司 | Permanent magnet rotor, and rotating machine comprising such a rotor |
-
2011
- 2011-08-02 JP JP2011169542A patent/JP5429241B2/en not_active Expired - Fee Related
-
2012
- 2012-08-01 BR BR102012019289A patent/BR102012019289A2/en not_active IP Right Cessation
- 2012-08-01 CN CN2012102722304A patent/CN102916510A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0336939A (en) * | 1989-06-29 | 1991-02-18 | Fanuc Ltd | Radial rotor structure |
| JPH0588165U (en) * | 1992-04-24 | 1993-11-26 | オークマ株式会社 | Electric motor rotor |
| US5378953A (en) * | 1992-06-08 | 1995-01-03 | Fanuc Ltd. | Rotor for synchronous motor |
| CN1375122A (en) * | 1999-09-20 | 2002-10-16 | 埃科艾尔公司 | Permanent magnet rotor portion for electric machines |
| JP2002369425A (en) * | 2001-06-12 | 2002-12-20 | Nishishiba Electric Co Ltd | Permanent magnet rotor |
| US20040095033A1 (en) * | 2002-11-15 | 2004-05-20 | Popov Vladimir Vladimirovich | Rotor assembly for a permanent magnet electrical machine comprising such a rotor assembly |
| JP2008067574A (en) * | 2006-09-11 | 2008-03-21 | Yaskawa Electric Corp | Embedded magnet type motor |
| JP2009177944A (en) * | 2008-01-24 | 2009-08-06 | Calsonic Kansei Corp | Motor |
| CN102067411A (en) * | 2008-06-16 | 2011-05-18 | 利莱森玛发电机有限公司 | Permanent magnet rotor, and rotating machine comprising such a rotor |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300711B (en) * | 2013-07-17 | 2016-08-24 | 株式会社日立制作所 | Wheel spoke type electric motor and the Winch for elevator of use wheel spoke type electric motor |
| CN104426268A (en) * | 2013-09-03 | 2015-03-18 | 爱信精机株式会社 | Electric motor |
| CN106549515A (en) * | 2015-09-18 | 2017-03-29 | 株式会社安川电机 | Electric rotating machine |
| CN106549515B (en) * | 2015-09-18 | 2019-03-01 | 株式会社安川电机 | Rotating electric machine |
| CN107666192A (en) * | 2016-07-29 | 2018-02-06 | 艾塔尔公司 | Rotor for syncmotor |
| CN107666192B (en) * | 2016-07-29 | 2021-03-30 | 艾塔尔公司 | Rotor for synchronous motor |
| CN114157066A (en) * | 2020-09-07 | 2022-03-08 | 日立金属株式会社 | Rotating electrical machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5429241B2 (en) | 2014-02-26 |
| JP2013034325A (en) | 2013-02-14 |
| BR102012019289A2 (en) | 2014-08-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102916511A (en) | Rotating electrical machine | |
| JP5643127B2 (en) | Rotating machine rotor | |
| JP5353917B2 (en) | Rotating machine rotor | |
| CN102916510A (en) | Rotary motor | |
| JP6640621B2 (en) | Motor rotor and brushless motor | |
| WO2014112021A1 (en) | Motor | |
| JP6127354B2 (en) | Rotor including anti-rotation mechanism for multipolar structures | |
| JP5228316B2 (en) | Rotating electric machine rotor and rotating electric machine | |
| CN102629786A (en) | Rotating electrical machine | |
| WO2014115436A1 (en) | Permanent-magnet-type rotating electric mechanism | |
| JP2012165481A (en) | Rotor for rotary electric machine | |
| JP6083467B2 (en) | Permanent magnet embedded rotary electric machine | |
| WO2017061305A1 (en) | Rotor and rotating electric machine | |
| JP6748852B2 (en) | Brushless motor | |
| WO2017195498A1 (en) | Rotor and rotary electric machine | |
| JP2014045634A (en) | Rotor and rotary electric machine including the same | |
| US10014736B2 (en) | Permanent magnet-embedded motor and rotor thereof | |
| JP5571480B2 (en) | Manufacturing method of motor | |
| JP6018940B2 (en) | Rotor and motor | |
| CN102882296A (en) | Rotating electrical machine | |
| JP6074887B2 (en) | Gap gauge used for assembling electric motor and method for manufacturing electric motor | |
| JP6357859B2 (en) | Permanent magnet embedded rotary electric machine | |
| JP2007053864A (en) | Permanent magnet embedded rotor | |
| JP2009296841A (en) | Rotary electric machine | |
| JP2007259514A (en) | Rotating electric machine for employing divided stator iron core |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130206 |