CN1808844A - Permanent magnet type rotary electric machine and compressor using it - Google Patents
Permanent magnet type rotary electric machine and compressor using it Download PDFInfo
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- CN1808844A CN1808844A CN 200510022897 CN200510022897A CN1808844A CN 1808844 A CN1808844 A CN 1808844A CN 200510022897 CN200510022897 CN 200510022897 CN 200510022897 A CN200510022897 A CN 200510022897A CN 1808844 A CN1808844 A CN 1808844A
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
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Abstract
In the permanent magnet type rotary electric machine, when the flux axis of a permanent magnet is set as a d-axis, and an axis orthogonal to the d-axis is set as a q-axis, permanent magnet insertion holes formed in a rotor iron core are arranged at the same position in the axial direction, a magnetic pole iron core is formed in which the gap length of the q-axis side is made longer than the gap length of the d-axis side for aggregating magnetic fluxes of the permanent magnets, a plurality of gap faces are formed at the external periphery of the magnetic pole iron core, and the position of the magnetic pole iron core is arranged so as to be shifted stepwise relative to the axial direction. The pulse torque at driving is thus reduced by half with phases of the pulse torque and the cogging torque generated by a winding shifted with each other at 180[deg.], thereby achieving low noise.
Description
The application divides an application, the application number of its female case application: 03147457.8, and the applying date: 2003.7.11, denomination of invention: permanent magnet type electric rotary machine and use the compressor of this motor
Technical field
The present invention relates to a kind of permanent magnet type electric rotary machine that forms the permanent magnet of using in magnetic field that on rotor, has, relate in particular to the permanent magnet type electric rotary machine of a kind of lift-launch in compressors such as air conditioner, freezer and freezer.
Background technology
In the past, in this permanent magnet type electric rotary machine, adopted diversified shape.For example, open in the described permanent magnet type electric rotary machine of 2000-175389 communique the spy, by set after a side of the magnetic pole of rotor core cut the outer peripheral face shape and with its axially reverse carry out stacked, tilt and form simulation, reduce and the relevant cogging torque (cogging torque) of generation noise.Open in the described permanent magnet type electric rotary machine of 2002-84693 communique the spy, by setting apart from the effective magnetic pole aperture θ 2 of the rotor axis of permanent magnet and the long g2 in its gap, make the long optimization that concerns with the magnetic pole aperture in two kinds of gaps, and minimizing is related to the cogging torque of the generation of noise.
In addition, the electric rotating machine of Driven Compressor, it is disclosed to open 2000-175389 communique (with reference to Fig. 7) as the spy, in order to obtain making simple, small-sized electric rotating machine, twine stator winding and concentrate, use the permanent magnet type electric rotary machine that in rotor, adopts permanent magnet.
In addition, for the pulsating torque in the operation process that reduces permanent magnet type electric rotary machine with the noise that produces thereupon, it is disclosed that for example the spy opens flat 5-103453 communique (with reference to Fig. 1), and stacked direction forms the space in the rotor core upper edge of the outside diameter of the permanent magnet that is mounted.
In above-mentioned existing technology, be conceived to reduce cogging torque, but what influence noise problem as electric rotating machine is to follow the electric rotating machine structure that comprises cogging torque and the size of the pulsating torque that produces.
Especially on stator core, concentrate the situation of the armature winding of winding in formed a plurality of grooves in the mode in T shape portion, because armature winding self and distributed winding 180 the degree coils inequality, be 120 the degree coils, so contain 5 times, 7 times, 11 times, 13 times, 17 times, 19 times ... a plurality of high order harmonic component magnetic potentials, concerning rotor, it is 6 times, 12 times, 18 times ... pulsating torque, cogging torque also is essentially composition 6 times, therefore the pulsating torque in operation process becomes big, usually becomes the reason that causes noise problem.In order to reduce these problems,,, the problem that can not reduce actual pulsating torque is significantly arranged even only reduce cogging torque though can on rotor or stator core, implement.
Summary of the invention
The object of the present invention is to provide a kind of cogging torque and pulsating torque of reducing, and can solve the permanent magnet type electric rotary machine of noise problem.
To achieve these goals, the present invention proposes a kind of permanent magnet type electric rotary machine, have on stator core in formed a plurality of grooves, carry out the stator of the armature winding of concentrating winding in the mode in T shape portion, in formed a plurality of permanent magnet jacks on rotor core, take in permanent magnet rotor, be spaced apart on the interior week that is supported on stator with gap also free to rotately; The magnetic flux axle of permanent magnet is got make the d axle, when perpendicular axle is got and is made the q axle, to be located at permanent magnet prong configuration on the rotor core on the direction of principal axis same position, and form the gap that makes q axle side grows up in the long pole core in the gap of d axle side for the magnetic flux with permanent magnet carries out boundling, a plurality of clearance planes are set on the pole core outer peripheral face, and the pole core position is configured in the stepped mode that staggers of relative direction of principal axis.
The present invention proposes a kind of permanent magnet type electric rotary machine in addition, have on stator core in formed a plurality of grooves, carry out the stator of the armature winding of concentrating winding in the mode in T shape portion, in formed a plurality of permanent magnet jacks on rotor core, take in permanent magnet rotor, be spaced apart on the interior week that is supported on stator with gap also free to rotately; The magnetic flux axle of permanent magnet is got make the d axle, when perpendicular with it axle is got and is made the q axle, to be located at permanent magnet prong configuration on the rotor core on the direction of principal axis same position, and form the gap that makes q axle side grows up in the long pole core in the gap of d axle side for the magnetic flux with permanent magnet carries out boundling, a plurality of clearance planes are set on the pole core outer peripheral face, the aperture of the long little pole core in gap is in electrical degree is roughly 90 and spends in the scopes of 120 degree, and pole core is configured in the stepped mode that staggers of relative direction of principal axis.
The present invention further proposes a kind of permanent magnet type electric rotary machine, have on stator core in formed a plurality of grooves, carry out the stator of the armature winding of concentrating winding in the mode in T shape portion, in formed a plurality of permanent magnet jacks on rotor core, take in permanent magnet rotor, be spaced apart on the interior week that is supported on stator with gap also free to rotately; The magnetic flux axle of permanent magnet is got make the d axle, when perpendicular with it axle is got and is made the q axle, to be located at permanent magnet prong configuration on the rotor core on the direction of principal axis same position, and the pole core that the gap length that forms q axle side for the magnetic flux with permanent magnet carries out boundling is grown up than the gap of d axle side, it is asymmetric and a plurality of clearance planes are set on the pole core outer peripheral face that the left and right sides is arranged at the relative d axle of the circular-arc part center of pole core, and the pole core position is configured in the relative direction of principal axis mode that staggers that is in the shape of the letter V.
The present invention further proposes a kind of permanent magnet type electric rotary machine, have on stator core in formed a plurality of grooves, carry out the stator of the armature winding of concentrating winding in the mode in T shape portion, in formed a plurality of permanent magnet jacks on rotor core, take in permanent magnet rotor, be spaced apart on the interior week that is supported on stator with gap also free to rotately; In that being got, the magnetic flux axle of permanent magnet makes the d axle, perpendicular axle is got when making the q axle, to be located at permanent magnet prong configuration on the rotor core on the direction of principal axis same position, and form the gap that makes q axle side grows up in the long pole core in the gap of d axle side for the magnetic flux with permanent magnet carries out boundling, it is asymmetric that the left and right sides is arranged at the relative d axle of the circular-arc part center of pole core, and on this pole core outer peripheral face, a plurality of clearance planes are set, the aperture of long little this pole core in gap is in electrical degree is roughly 90 and spends in the scopes of 120 degree, and the pole core position is configured in the relative direction of principal axis mode that staggers that is in the shape of the letter V.
The present invention further proposes a kind of permanent magnet type electric rotary machine, have on stator core in formed a plurality of grooves, carry out the stator of the armature winding of concentrating winding in the mode in T shape portion, in formed a plurality of permanent magnet jacks on rotor core, take in permanent magnet rotor, be spaced apart on the interior week that is supported on stator with gap also free to rotately; The magnetic flux axle of permanent magnet is got make the d axle, when perpendicular with it axle is got and is made the q axle, to be located at permanent magnet prong configuration on the rotor core on the direction of principal axis same position, and form the gap that makes q axle side grows up in the long pole core in the gap of d axle side for the magnetic flux with permanent magnet carries out boundling, it is asymmetric and a plurality of clearance planes are set on the pole core outer peripheral face that the left and right sides is arranged at the relative d axle of the circular-arc part center of pole core, with stepped staggering of the relative direction of principal axis in pole core position, and the direction of principal axis top and the bottom of pole core are same shape.
The present invention further proposes a kind of permanent magnet type electric rotary machine, have on stator core in formed a plurality of grooves, carry out the stator of the armature winding of concentrating winding in the mode in T shape portion, on rotor core, take in formed a plurality of permanent magnet jacks permanent magnet rotor, be spaced apart on the interior week that is supported on stator with gap also free to rotately; In that being got, the magnetic flux axle of permanent magnet makes the d axle, perpendicular axle is got when making the q axle, to be located at permanent magnet prong configuration on the rotor core on the direction of principal axis same position, and form the gap that makes q axle side grows up in the long pole core in the gap of d axle side for the magnetic flux with permanent magnet carries out boundling, it is asymmetric that the left and right sides is arranged at the relative d axle of the circular-arc part center of this pole core, and a plurality of clearance planes are set on the pole core outer peripheral face, the aperture of the long little pole core in gap is in electrical degree to be roughly 90 and to spend in the scopes of 120 degree, with stepped staggering of the relative direction of principal axis in pole core position, and the direction of principal axis top and the bottom of pole core are same shape.
The present invention further proposes a kind of permanent magnet type electric rotary machine, have on stator core in formed a plurality of grooves, carry out the stator of the armature winding of concentrating winding in the mode in T shape portion, in formed a plurality of permanent magnet jacks on rotor core, take in permanent magnet rotor, be spaced apart on the interior week that is supported on stator with gap also free to rotately; The magnetic flux axle of permanent magnet is got make the d axle, when perpendicular with it axle is got and is made the q axle, to be located at permanent magnet prong configuration on the rotor core on the direction of principal axis same position, and form the gap that makes q axle side grows up in the long pole core in the gap of d axle side for the magnetic flux with permanent magnet carries out boundling, it is asymmetric and a plurality of clearance planes are set on the pole core outer peripheral face that the left and right sides is arranged at the relative d axle of the circular-arc part center of pole core, with stepped staggering of the relative direction of principal axis in pole core position, and the direction of principal axis top and the bottom of pole core are different shapes.
The present invention further proposes a kind of permanent magnet type electric rotary machine, have on stator core in formed a plurality of grooves, carry out the stator of the armature winding of concentrating winding in the mode in T shape portion, in formed a plurality of permanent magnet jacks on rotor core, take in permanent magnet rotor, be spaced apart on the interior week that is supported on stator with gap also free to rotately; In that being got, the magnetic flux axle of permanent magnet makes the d axle, the axle perpendicular with it got when making the q axle, to be located at permanent magnet prong configuration on the rotor core on the direction of principal axis same position, and form the gap that makes q axle side grows up in the long pole core in the gap of d axle side for the magnetic flux with permanent magnet carries out boundling, it is asymmetric that the left and right sides is arranged at the relative d axle of the circular-arc part center of pole core, and a plurality of clearance planes are set on the pole core outer peripheral face, with stepped staggering of the relative direction of principal axis in pole core position, and the aperture of the long little pole core in gap is in electrical degree is roughly 90 and spends in the scopes of 120 degree, the direction of principal axis top and the bottom of pole core are different shapes.
The present invention further proposes a kind of permanent magnet type electric rotary machine, have on stator core in formed a plurality of grooves, carry out the stator of the armature winding of concentrating winding in the mode in T shape portion, in formed a plurality of permanent magnet jacks on rotor core, take in permanent magnet rotor, be spaced apart on the interior week that is supported on this stator with gap also free to rotately; In that being got, the magnetic flux axle of permanent magnet makes the d axle, the axle perpendicular with it got when making the q axle, to be located at permanent magnet prong configuration on the rotor core on the direction of principal axis same position, and form the gap that makes q axle side grows up in the long pole core in the gap of d axle side for the magnetic flux with this permanent magnet carries out boundling, it is asymmetric that the left and right sides is arranged at the relative d axle of the circular-arc part center of pole core, and a plurality of clearance planes are set on the pole core outer peripheral face, also be provided with the stepped pole core I that staggers of the relative direction of principal axis in pole core position, with the pole core II that single clearance plane is set at this pole core outer peripheral face, and at the roughly centre of pole core I place's configuration pole core II.
To in rotor core, embed in the embedding magnet arrangement and a plurality of grooves on being formed at stator core of magnet, carry out the noise of the permanent magnet type electric rotary machine that the stator structure of the armature winding of concentrating winding makes up in order to reduce as can be known in the mode in T shape portion, produce cogging torque and need only to reduce, and proposed several different methods at it by stator and rotor structure.In the present invention, the torque of rotor is an electromagnetic torque, this is that structure by stator and rotor causes equally, but because concentrate 180 coils of the armature winding of winding and existing distributed winding inequality, be 120 degree coils, even so supply with sine-wave current, in the magnetic potential of coil, also contain 5 times, 7 times, 11 times, 13 times, 17 times, 19 times ... a plurality of high order harmonic component magnetic potential compositions, concerning rotor, it is 6 times, 12 times, 18 times ... pulsating torque, cogging torque also is essentially composition 6 times, and therefore the pulsating torque in operation process becomes big, usually becomes the reason that causes noise problem.At this, do not reduce cogging torque in the present invention, and cogging torque is taken place, and will become 180 degree with the phase difference based on the pulsating torque of armature winding and offset cogging torque and pulsating torque based on armature winding effectively, become the pulsating torque of the rotor of the reason that produces noise in the operation process with reduction.Its structure is, have on stator core in formed a plurality of grooves, carry out the stator of the armature winding of concentrating winding in the mode in T shape portion, in formed a plurality of permanent magnet jacks on rotor core, take in the rotor of permanent magnet, be spaced apart in the permanent magnet type electric rotary machine on the interior week that is supported on stator with gap also free to rotately, in that being got, the magnetic flux axle of permanent magnet makes the d axle, perpendicular axle is got when making the q axle, to be located at permanent magnet prong configuration on the rotor core on the direction of principal axis same position, and form the gap that makes q axle side grows up in the long pole core in the gap of d axle side for the magnetic flux with permanent magnet carries out boundling, a plurality of clearance planes are set on the pole core outer peripheral face, and the pole core position is configured in the stepped mode that staggers of relative direction of principal axis, in view of the above, cogging torque becomes 180 degree with phase difference based on the pulsating torque of armature winding, make cogging torque and offset effectively, become the pulsating torque of the rotor of the reason that produces noise in moving the commentaries on classics with reduction based on the pulsating torque of armature winding.In addition, abide by this principle, the size that must come cogging torque by each electric rotating machine, but can adjust by on the pole piece of the T of secured core shape portion inner peripheral surface, imposing to cut sth. askew for this.Thereby, a kind of necessity output and little permanent magnet type electric rotary machine of noise of guaranteeing electric rotating machine can be provided.
In addition, the present invention for achieving the above object, as permanent magnet type electric rotary machine, be provided with the stator with the stator core that concentrate to twine stator winding form magnetic pole with axially permanent magnet being installed and have Zhou Fangxiang spaced apart relative with the said stator iron core with gap to the rotor of rotor core, the 1st rotor core and the 2nd rotor core is stacked and constitute above-mentioned rotor core, and, be formed with the space of relative pole center symmetry along the rotor core stacked direction at the outside diameter of the above-mentioned permanent magnet of above-mentioned the 2nd rotor core.
In said structure, by form the space on above-mentioned the 2nd rotor core, rotor core is by exist the part in space and the part that does not have the space to constitute along stacked direction.Its result can offset high order harmonic component because of the phase difference of the main high order harmonic component composition of pulsating torque and induced electromotive force is roughly 180 degree.Like this, because offset the high order harmonic component of the main cause that produces vibrating noise and make induced electromotive force near sinusoidal wave, so can suppress the generation of electro-magnetic exciting force.
In addition, because the position of magnetic pole of the 1st rotor core and the 2nd rotor core is identical, and have the space of stacked direction on the 2nd rotor core, so on the first-harmonic of the induced electromotive force of each magnetic pole section, do not produce phase difference, its result, the generation torque can be do not reduced, pulsating torque and the noise of following its generation can be reduced simultaneously again.
Description of drawings
Fig. 1 is the cutaway view of radial section shape of the embodiment 1 of expression permanent magnet type electric rotary machine of the present invention.
Fig. 2 is the cutaway view of radial section shape of the stator of expression embodiments of the invention 1.
Fig. 3 is the cutaway view that the rotor of Fig. 1 is amplified, represents the rotor radial cross sectional shape.
Fig. 4 is the stereogram of rotor of the embodiment 1 of expression permanent magnet type electric rotary machine of the present invention.
Fig. 5 is the schematic diagram of pulsating torque of the embodiment 1 of expression permanent magnet type electric rotary machine of the present invention.
Fig. 6 is the cutaway view of radial section shape of rotor of the embodiment 2 of expression permanent magnet type electric rotary machine of the present invention.
Fig. 7 is the stereogram of rotor of the embodiment 2 of permanent magnet type electric rotary machine of the present invention.
Fig. 8 is the amplification stereogram of rotor of the embodiment 3 of permanent magnet type electric rotary machine of the present invention.
Fig. 9 is the amplification stereogram of rotor of the embodiment 4 of permanent magnet type electric rotary machine of the present invention.
Figure 10 is the amplification stereogram of rotor of the embodiment 5 of permanent magnet type electric rotary machine of the present invention.
Figure 11 is the amplification stereogram of rotor of the embodiment 6 of permanent magnet type electric rotary machine of the present invention.
Figure 12 is the amplification stereogram of rotor of the embodiment 7 of permanent magnet type electric rotary machine of the present invention.
Figure 13 is the amplification stereogram of rotor of the embodiment 8 of permanent magnet type electric rotary machine of the present invention.
Figure 14 is the section shape that cuts of compressor of the present invention.
Figure 15 is the cross section face shape of compressor of the present invention.
Figure 16 is the radial cross-section of the embodiment 9 of expression permanent magnet type electric rotary machine of the present invention.
Figure 17 is the amplification stereogram of the rotor of expression permanent magnet type electric rotary machine shown in Figure 16.
Figure 18 is the oscillogram of measurement result of the pulsating torque of expression permanent magnet type electric rotary machine shown in Figure 16.
Figure 19 is the oscillogram of measurement result of the induced electromotive force of expression permanent magnet type electric rotary machine shown in Figure 16.
Figure 20 is the schematic diagram suitable with Figure 17 of the embodiment 10 of expression permanent magnet type electric rotary machine of the present invention.
Figure 21 is the schematic diagram suitable with Figure 16 of the embodiment 11 of expression permanent magnet type electric rotary machine of the present invention.
Figure 22 is the schematic diagram suitable with Figure 16 of the embodiment 12 of expression permanent magnet type electric rotary machine of the present invention.
Among the figure: 1, the 103-permanent magnet type electric rotary machine, 2, the 108-stator, 3, the 107-rotor, 4-T shape portion, 5,120-yoke (yoke), 6, the 116-stator core, 7, the 118-slot part, 8-armature winding, the circular-arc part of 9-T shape portion, the 10-oblique cutting part, 11, the 109-rotor core, 12,20-permanent magnet jack, 13,21,112,112A, the 112B-permanent magnet, 14-axis hole, 15, the 22-recess, 16,19,25, the 26-pole core, 17,23-circular arc recess, 18, the 24-magnetic pole piece, the quiet whirlpool of 27-disk component, 28, the 31-end plate, 29, the 32-roll bending, 30-movable orbiting scroll parts, 33-axle, 34-discharge chambe, the 35-outlet, 36-frame, 37-compression container, the 38-discharge pipe, 39-oilhole, 40-oil storage portion, the 41-sliding bearing, 42-bearing, 110A-the 1st rotor core, 110B-the 2nd rotor core, 110a-the 1st rotor core unit, 110b-the 2nd rotor core unit, 114,114A, the 114B-space, 117 (117U～117W)-stator winding, 119-tooth portion, the 121-curved surface, 122A, the 122B-tabular surface.
Embodiment
Below, with reference to Fig. 1～Figure 15 embodiments of the invention are elaborated.In each figure, the same parts of general symbolic representation.In addition, shown the permanent magnet type electric rotary machine of 4 utmost points, and the ratio of the number of poles of rotor and the groove number of stator is 2: 3 at this.
Fig. 1 has represented the radial section shape of the embodiment 1 of permanent magnet type electric rotary machine of the present invention, Fig. 2 has represented the enlarged drawing of radial section shape of the stator of embodiments of the invention 1, and Fig. 3 has represented the enlarged drawing of radial section shape of the rotor of embodiments of the invention 1.In Fig. 1 (a), Fig. 2, permanent magnet type electric rotary machine 1 is made of stator 2 and rotor 3.Stator 2 is made of the armature winding 8 (U phase coil 8a, V phase coil 8b, W phase coil 8c by three-phase coil form) of the concentrated winding that is wound in the stator core 6 and the slot part 7 between T shape portion 4 formed with T shape portion 4 and yoke 5, in the mode in T shape portion 4.At this, because permanent magnet type electric rotary machine 1 is 4 utmost points, 6 grooves, so separation is 120 degree electrical degrees.With the rotor 3 opposed inner peripheral surfaces of T shape portion 4 on, the oblique cutting part 10 that is provided with circular-arc part 9 and forms in the mode of leaving from the outer peripheral face of rotor 3 gradually.
In Fig. 1 (a), Fig. 3 (a), take in permanent magnet 13 in the permanent magnet jack 12 of rotor 3 formed in-line on rotor core 11 and form by the axis hole 14 that is used for rotating shaft (not shown) tabling.At this, will get along the axle that the pole center direction of rotor 3 is extended and make the d axle, will along and the pole center direction at interval the axle that extends of the direction between the magnetic pole of 90 degree electrical degrees get and make the q axle.By (q axle) side between the utmost point of the outer peripheral face of rotor core 11 2 recesses 15 along the shape of the summary V font of linearity cutting of combination are set, play the magnetic flux that makes permanent magnet 13 pole core 16 to the effect of magnetic pole side boundling and form.This pole core 16 is got and separation magnetic pole aperture θ 1 about equally, and by roughly being cut into the magnetic pole piece 18 that circular-arc circular arc recess 17 forms the magnetic pole aperture θ 2 narrower than magnetic pole aperture θ 1.Its result, the most peripheral of the magnetic pole strength of rotor 3 is the magnetic pole piece 18 of magnetic pole aperture θ 2, then be magnetic pole aperture θ 1, be recess 15 again, because between magnetic pole aperture θ 2 and magnetic pole aperture θ 1, make a side identical, so the ladder of the A portion that represents with zero mark is formed on the right side (observing from the center O of rotor 3) of magnetic pole piece 18.In addition, be provided with a plurality of spaces, these a plurality of spaces, observe from the d axle, with respect to the angle θ 3 of ladder A portion, be θ 4＞θ 3 when the angle of the end of pole core 16 is θ 4, and magnetic pole piece 18 is asymmetric, and the long g1 in gap that the T shape portion of magnetic pole piece 18 and stator 2 is 4 is shorter, when the gap length between the T shape portion 4 of circular arc recess 17 and stator 2 is made as g2, be the relation of g2＞g1.
Fig. 1 (b), Fig. 3 (b) are the radial section shapes that is illustrated in the cross section of another direction of principal axis position, in Fig. 1 (b) Fig. 3 (b), different with Fig. 1 (a), Fig. 3 (a) is, on the d of rotor core 11 axle side outer peripheral face, form pole core 16 with separation magnetic pole angle θ 1 about equally, and, form the magnetic pole piece 18 of the magnetic pole aperture θ 2 narrower by cutting into circular-arc circular arc recess 17 than magnetic pole aperture θ 1 in its both sides.At this, because magnetic pole aperture θ 2 is configured in pole center, so the ladder of A portion that between magnetic pole aperture θ 1 and magnetic pole aperture θ 2, represents and B portion, be formed on the both sides of magnetic pole piece 18 with zero mark.From the d axle, be θ 5 as if angle to ladder A, B portion, then be the relation of θ 4＜θ 5＜θ 3.
Fig. 1 (c), Fig. 3 (c) are the radial section shapes that is illustrated in the cross section of another direction of principal axis position, in Fig. 1 (c), Fig. 3 (c), different with Fig. 1 (a), Fig. 3 (a) is, on the d of rotor core 11 axle side outer peripheral face, form pole core 16 with separation magnetic pole angle θ 1 about equally, and, form the magnetic pole piece 18 of the magnetic pole aperture θ 2 narrower than magnetic pole aperture θ 1 by roughly cutting into circular-arc circular arc recess 17.Its result is because make a side identical between magnetic pole aperture θ 2 and magnetic pole aperture θ 1, so the ladder of the B portion that represents with zero mark is formed on the left side (observing from the center O of rotor 3) of magnetic pole piece 18.
In addition, A, B ladder that usefulness zero mark among the embodiment 1 is represented illustrate with acute angle, even but little also it doesn't matter from the making face gradient.
The direction of principal axis cross section of the stator 2 of embodiment 1 all is identical cross section in which position, but the direction of principal axis cross section of rotor 3 has nothing in common with each other because of the position is different.Fig. 4 has represented the stereogram of the rotor of embodiments of the invention 1.In Fig. 4, in-line permanent magnet 13 is incorporated in axially continuously in the permanent magnet jack 12 of same position, according to the direction of principal axis circumferential locations difference of magnetic pole piece 18 only.In other words, the position of the pole core of rotor is with respect to direction of principal axis stepped being configured of staggering.
But, using in the permanent magnet type electric rotary machine 1 as the driven compressor of object of the present invention, usually there is the problem that produces noise.Main cause as the noise that increases permanent magnet type electric rotary machine 1 is a pulsating torque, but pulsating torque is as long as increase the magnetic density that the gap is long, reduce the gap simply.But, because if add the magnetic density that broad gap length reduces the gap, then that part of output diminishes, so its result will keep identical output must add large volume.Therefore, found out a kind of magnetic flux that does not reduce the permanent magnet that produces electromagnetic torque, just can reduce method as the pulsating torque of the main cause that produces noise by various experiments.
Fig. 5 represents the pulsating torque of embodiments of the invention 1.Fig. 5 (a) gets rotor angle as transverse axis, in expression on the longitudinal axis based in the pulsating torque that produces according to coil that when the armature winding 8 of concentrating winding is supplied with sine-wave currents, is taken place with by the cogging torque (cogging torque) of the structure generation of stator and rotor, in Fig. 5 (b) rotor angle got and make transverse axis, the torque in the time of will turning round as permanent magnet type electric rotary machine on the longitudinal axis is represented with p.u..From Fig. 5 (a) as can be known, owing to the pulsating torque that produces based on coil, be according to concentrating winding to make the rotor angle difference that the increase and decrease of torque take place because of adopting, its ± peak value is 21p.u. to the maximum.Relative therewith, also change with the cogging torque that the structure of rotor produces by stator according to rotor angle is different, its ± peak value is 16p.u. to the maximum, but so-called pulsating torque phase phasic difference 180 degree based on coil.Its result, shown in Fig. 5 (b), the torque when turning round as permanent magnet type electric rotary machine 1 ± peak value is reducible to reduce by half to 10p.u..
As mentioned above as can be known, because at the inner peripheral surface of the T shape portion 4 of stator 2 that adopt to concentrate winding, be applied with oblique cutting part 10, and on direction of principal axis, along the circumferential direction stagger and the pulsating torque in when running is reduced by half by the magnetic pole piece 18 with rotor 3, so can realize low noiseization.
In addition, known to the pulsation in when running, be reduced near zero, as long as increase cogging torque, but when as operating condition multiple revolution, load torque being arranged, as long as have the whole size that determines cogging torque in mind.The big I of cogging torque is adjusted by the size of oblique cutting part 10.
In addition, in order to make based on the pulsating torque of coil and 180 degree of phasic difference mutually of cogging torque, the angle of θ 1, θ 2 is important, though confirm that electrical degrees that electrical degree, θ 2 that θ 1 is roughly 120 degree are roughly 90 degree are for well, but, in the scope of 90～120 degree, exist optimum value according to the situation difference.
Fig. 6 is the cutaway view of radial section shape of the embodiment 2 of expression permanent magnet type electric rotary machine of the present invention, and Fig. 7 is the stereogram of rotor of the embodiment 2 of expression permanent magnet type electric rotary machine of the present invention.In the embodiment 2 of Figure 6 and Figure 7, with embodiment 1 difference of Fig. 2, be the permanent magnet jack 20 that in rotor core 11, forms 2 of per 1 utmost points, in this permanent magnet jack 20, insert dull and stereotyped permanent magnet 21, armature spindle constitutes the V word configuration of convex relatively.At this, Fig. 6 (a) is provided with recess 23, the formation pole core 19 of V-shape in interpolar (q axle) side of the outer peripheral face of rotor core 11, on the d of rotor core 11 axle side outer peripheral face, form and separation magnetic pole angle θ 1 about equally, and form the magnetic pole piece 24 of the magnetic pole aperture θ 2 narrower than magnetic pole aperture θ 1 by cutting into circular-arc circular arc recess 23.Its result is because make a side identical between magnetic pole aperture θ 2 and magnetic pole aperture θ 1, so the ladder of the A portion that represents with zero mark is formed on the right side (center O from rotor 3 is observed) of magnetic pole piece 24.
Fig. 6 (b) is the radial section shape that is illustrated in the cross section of another direction of principal axis position.In Fig. 6 (b) be with Fig. 6 (a) difference, on the d of rotor core 11 axle side outer peripheral face, be provided with about equally magnetic pole angle θ 1 of separation, form pole core 19, and form the magnetic pole piece 24 of the magnetic pole aperture θ 2 narrower by cutting into circular-arc circular arc recess 23 than magnetic pole aperture θ 1 in its both sides.At this, because magnetic pole aperture θ 2 is configured in pole center, so the ladder of A portion that represents with zero mark between magnetic pole aperture θ 2 and magnetic pole aperture θ 1 and B portion is formed on the both sides of magnetic pole piece 24.
Fig. 6 (c) is illustrated in the radial section shape in the cross section of another direction of principal axis position.In Fig. 6 (c), with the difference of Fig. 6 (a) be, on the d of rotor core 11 axle side outer peripheral face, be provided with and separation magnetic pole angle θ 1, formation pole core 19 about equally, and, form the magnetic pole piece 24 of the magnetic pole aperture θ 2 narrower by cutting into circular-arc circular arc recess 23 than magnetic pole aperture θ 1, because between magnetic pole aperture θ 2 and magnetic pole aperture θ 1, make a side identical, so the ladder of the B portion that represents with zero mark is formed on the left side of magnetic pole piece 24.Simultaneously, the ladder of representing with zero mark illustrates with acute angle, even but making face in easy flights also it doesn't matter.
Axially carrying out the rotor of Fig. 6 (a), Fig. 6 (b), Fig. 6 (c) stacked is Fig. 7, as can be seen from Figure 7, the permanent magnet 21 of V font is incorporated in axially continuously in the permanent magnet jack 20 of same position, according to the different and Zhou Fangxiang position difference of magnetic pole piece 24 only of direction of principal axis.
In the present embodiment, with Fig. 4 difference be the shape of permanent magnet 21, can obtain the effect identical with embodiment 1.
Fig. 8 is the amplification stereogram of rotor 3 of the embodiment 3 of expression permanent magnet type electric rotary machine of the present invention.In embodiment shown in Figure 83, with the difference of the embodiment 1 of Fig. 1 be, only carry out stacked along the direction of principal axis of rotor 3 rotor core shown in Fig. 1 (a) 11 and the rotor core 11 shown in Fig. 1 (c), magnetic force change on the mating surface of the rotor core 11 shown in the rotor shown in Fig. 1 (a) 11 and Fig. 1 (c) becomes precipitous, even but in a word in present embodiment 3, also can obtain the effect identical with the embodiment 1 of Fig. 1.
Fig. 9 is the amplification stereogram of rotor 3 of the embodiment 4 of expression permanent magnet type electric rotary machine of the present invention.In embodiment shown in Figure 94, with the difference of the embodiment 1 of Fig. 1 be, the rotor core 11 shown in Fig. 1 (a) is configured in the direction of principal axis both sides, the rotor core 11 shown in Fig. 1 (c) is configured in central portion and axially carries out stacked.In view of the above, magnetic pole piece 18 is configured to the result of V font, is can not produce axial thrust on rotor 3, can obtain the effect identical with the embodiment 1 of Fig. 1.At this,,, suppress manufacturing cost so can utilize identical parts in top and the bottom because the axial top and the bottom of the magnetic pole of rotor core are same shape.
Figure 10 is the amplification stereogram of rotor of the embodiment 5 of expression permanent magnet type electric rotary machine of the present invention.In embodiment shown in Figure 10 5, difference with the embodiment 2 of Fig. 7, only carry out stacked along the direction of principal axis of rotor 3 rotor core shown in Fig. 6 (a) 11 and the rotor core 11 shown in Fig. 6 (c), magnetic force change on the mating surface of the rotor core 11 shown in the rotor shown in Fig. 6 (a) 11 and Fig. 6 (c) becomes precipitous, even but in a word in present embodiment 5, also can obtain the effect identical with the embodiment 1 of Fig. 1.
Figure 11 is the amplification stereogram of rotor 3 of the embodiment 6 of expression permanent magnet type electric rotary machine of the present invention.In embodiment shown in Figure 11 6, with the difference of the embodiment 2 of Fig. 7 be, the rotor core 11 shown in Fig. 6 (a) is configured in the direction of principal axis both sides, the rotor core 11 shown in Fig. 6 (c) is configured in central portion and axially carries out stacked.In view of the above, magnetic pole piece 24 is configured to the result of V font, is can not produce axial thrust on rotor 3, can obtain the effect identical with the embodiment 1 of Fig. 1.
Figure 12 is the amplification stereogram of rotor 3 of the embodiment 7 of expression permanent magnet type electric rotary machine of the present invention.In embodiment shown in Figure 12 7, with the difference of the embodiment 1 of Fig. 1 be, rotor core 11 shown in Fig. 1 (a) is configured in the direction of principal axis both sides, the pole core 25 of the rotor core 11 that does not form circular arc recess 17 is configured in central portion and axially carries out stacked.In other words, rotor core shown in Fig. 1 (a) 11 and the rotor core 11 shown in Fig. 1 (c) are carried out stacked (abbreviating pole core I as), configuration does not form the pole core 25 (abbreviating pole core II as) of the rotor core 11 of circular arc recess 17 therebetween.In view of the above, owing between pole core I, there is pole core II, so the magnetic force change mitigation even in a word in present embodiment 7, also can obtain the effect identical with the embodiment 1 of Fig. 1.
Figure 13 is the amplification stereogram of rotor 3 of the embodiment 8 of expression permanent magnet type electric rotary machine of the present invention.In embodiment shown in Figure 13 8, with the difference of the embodiment 2 of Fig. 7 be, rotor core 11 shown in Fig. 6 (a) is configured in the direction of principal axis both sides, the pole core 26 of the rotor core 11 that does not form circular arc recess 17 is configured in central portion and axially carries out stacked.In other words, rotor core shown in Fig. 6 (a) 11 and the rotor core 11 shown in Fig. 6 (c) are carried out stacked (abbreviating pole core I as), configuration does not form the pole core 26 (abbreviating pole core II as) of the rotor core 11 of circular arc recess 17 therebetween.In view of the above, owing between pole core I, there is pole core II, so the magnetic force change mitigation even in a word in present embodiment 8, also can obtain the effect identical with the embodiment 1 of Fig. 1.
Figure 14 is the cutaway view of the cross section structure of expression compressor of the present invention.Compressor will stand upright on the whirlpool shape roll bending 29 on the end plate 28 of quiet snail disk component 27 and stand upright on the formation that is interlocked of whirlpool shape roll bending 32 on the end plate 31 of movable orbiting scroll parts 30, so that movable orbiting scroll parts 30 are rotated motion by bent axle 33, and carry out compressed action.The discharge chambe 34 (34a, the 34b that form by quiet whirlpool disk component 27 and movable orbiting scroll parts 30 ...) in, the discharge chambe that is positioned at outside diameter, with moving at the center that rotatablely moves to two whirlpool disk components 27,30, volume reduces gradually.When discharge chambe 34a, 34b arrived near the center of two whirlpool disk components 27,30, the Compressed Gas in two discharge chambes 34 were discharged from the outlet 35 that is connected with discharge chambe 34.The Compressed Gas that is discharged from arrives in the compression container 37 of frame 36 bottoms through the gas passage (not shown) that is located on static vortex disk parts 27 and the frame 36, and the discharge pipe 38 that is arranged on certainly on the sidewall of compression container 37 is discharged to outside the compressor.In addition, in this compressor, at pressure vessel 37 inner sealings permanent magnet type electric rotary machine 1 is arranged, the rotating speed of controlling with the converter of being put by other (not shown) is rotated, and realizes compressed action.At this, permanent magnet type electric rotary machine 1 is made of stator 2 and rotor 3, forms oilhole 39 in the inside of bent axle 33, by the rotation of bent axle 33 make the oil storage portion 40 that is in frame 36 bottoms lubricating oil, supply to sliding bearing 41, bearing 42 through oilhole 39.
In Figure 14, make stator 2 identical, but as shown in figure 15, even but also it doesn't matter in the direction of principal axis position of stagger stator 2 and rotor 3 with the direction of principal axis position of rotor 3.
Compressor uses as the drive source of air conditioner, freezer or freezer etc., but owing to grow up and turn round, so be one of most important goods of energy-conservationization of realization from the global warming problem.After permanent magnet type electric rotary machine was used in this drive source, the high efficiency by electric rotating machine realized energy-conservation, if but can not reduce noise and just can not be employed.But, permanent magnet type electric rotary machine of the present invention during as drive source, because noise is little, and is being solved environmental problem, so a kind of compressor of realizing efficient and energy-conservationization can be provided.
Below, according to Figure 16～compressor shown in Figure 19 embodiments of the invention 9 are described.
Compressor 101 has seal compression container 102 cylindraceous, be set in the sealing compression container 102 as the permanent magnet type electric rotary machine 103 of drive motor with by this permanent magnet type electric rotary machine 103 and drive and be set at compression unit 104 in the seal compression container 102.
Permanent magnet type electric rotary machine 103, have be fixed on by bearing 105A, 105B can be supported on with rotating freely on the rotating shaft 106 in the seal compression container 102 rotor 107 with on ground, the spaced apart space of Zhou Fangxiang relative with this rotor to stator 108.
Permanent magnet 112 in above-mentioned rotor 107 has rotor core 109 that axially stacked the 1st rotor core 110A constitutes with the 2nd rotor core 110B and is installed in 4 installing holes 111 that form with above-mentioned the 1st rotor core 110A of rotating shaft 6 parallel perforations and above-mentioned the 2nd rotor core 110B respectively.The cross section of these permanent magnets 112 is in-line, and these permanent magnets 112 are adjacent in the mode that the extended line of in-line intersects vertically mutually.On rotor core 109, form 4 magnetic poles by the installation of these permanent magnets 112.At this, if will be made as the d axle along the axle that the footpath direction is extended the pole center of rotor core 109, the axle of will be between the adjacent d axle of this d axle and the 90 degree electrical degrees of being separated by, extending along the footpath direction is made as the q axle, then on the outer peripheral face of the rotor core 109 on this q axle, be provided with the device that is suppressed between adjacent pole the short circuit flux amount that flows, for example the groove 113 of the cross section V font that forms to the internal side diameter incision from outside diameter be set, so that magnetic flux is concentrated to the pole center side.The groove 113 of above-mentioned cross section V font is that 90 1V groove 113A that spend and angle of release α 2 form near the 180 2V groove 113B that spend by angle of release α 1.In addition, also can replace 2V groove 113B and between the outer peripheral face of the openend of 1V groove 113A and above-mentioned rotor core 109, form convex surface.
The 2nd rotor core 110B shown in Figure 16 (B), forms the space 114 that has long cross section along the footpath direction at the rotor core stacked direction respectively on the circumferential position of permanent magnet 112, these spaces 114 are formed on the axisymmetric cross section of above-mentioned relatively d.
On the other hand, on the 1st rotor core 110A, shown in Figure 16 (A), there is not the space in the circumferential position of permanent magnet 112.
The rotor core 109 of Gou Chenging like this has and is used for the installing hole 115 installed to rotating shaft 106 at central part.
Said stator winding 117 is concentrated winding modes that the above-mentioned tooth of encirclement portion 119 twines, and has U phase winding 117U, V phase winding 117V, W phase winding 117W.
The permanent magnet type electric rotary machine 103 of Gou Chenging like this is because be 4 utmost points, 6 grooves, so the electrical degree of separation is 120 degree.In addition, tooth portion central part forms the curved surface 121 concentric with rotating shaft 106, relative with the rotor core 109 of tooth portion 119 to inner peripheral surface on, form from tooth portion central part more to the two ends of Zhou Fangxiang and tabular surface 122A, the 122B wide more with the gap of above-mentioned rotor core 109.
According to present embodiment, the 1st rotor core 110A by the stacked space that does not have an iron core stacked direction and exist along the 2nd rotor core 110B in the space 114 of iron core stacked direction and constitute rotor core 109, and the phase difference that makes the main high order harmonic component composition of pulsating torque and induced electromotive force is roughly 180 degree, so can offset high order harmonic component.Thereby, because offset the high order harmonic component of the main cause that produces vibrating noise and make induced electromotive force near sinusoidal wave, so can suppress the generation of electro-magnetic exciting force.
In addition, because the 1st rotor core 110A is identical with the position of magnetic pole of the 2nd rotor core 110B, and the space 114 that on the 2nd rotor core 110B, has stacked direction, so the first-harmonic of the induced electromotive force on each magnetic pole section does not produce phase difference, its result, the generation torque can be do not reduced, pulsating torque and the noise of following its generation can be reduced simultaneously again.
As mentioned above, after the generation torque of the permanent magnet type electric rotary machine 103 that constitutes as the drive motor of compressor measured, obtain measurement result shown in Figure 180.
In Figure 18, transverse axis is represented rotor-position, and the longitudinal axis is illustrated in the torque that takes place when feeding sine-wave current on the stator core 116 of concentrating winding.And, measurement result when Figure 18 (A) expression only constitutes rotor core 109 by the 1st rotor core 110A, measurement result when Figure 18 (B) expression only constitutes rotor core 109 by the 2nd rotor core 110B with space 114, the measurement result when Figure 18 (C) expression combination the 1st rotor core 110A and the 2nd rotor core 110B constitute rotor core 109.
In Figure 18 (A)～(C), the direction of principal axis length of rotor core 109 and stator core 116, be that stacked thickness is identical, but the rotor core 109 shown in Figure 18 (C), the stacked thickness that is set to the 1st rotor core 110A is 60% of integral body, the stacked thickness of the 2nd rotor core 110B is 40% of integral body, in addition, and in Figure 18 (A)～(C), the generation torque of the longitudinal axis is represented the average torque of the 1st rotor core 110A shown in Figure 18 (A) relatively as 1p.u..
Measurement result, in Figure 18 (A)～(B), torque takes place to be had respectively than cataclysm because of the rotor-position difference, and maximum and minimum value poor is about 0.13p.u. in Figure 18 (A), be about 0.21p.u. in Figure 18 (B).And, from the mensuration waveform of two figure as can be known the phase difference of pulsating torque be about 180 degree.Thereby,,, just can reduce pulsating torque as long as adjust the combination of the stacked thickness of the 1st rotor core 110A and the 2nd rotor core 110B in order to make the big or small roughly the same of pulsating torque.
Figure 18 (C), as mentioned above, because so that the stacked thickness of the 1st rotor core 110A is whole 60%, the stacked thickness that makes the 2nd rotor core 110B carries out stacked for whole 40% mode makes up, so the maximum of torque takes place and the difference of minimum value can be reduced to 0.04p.u..
Figure 19 is the oscillogram of measurement result of induced electromotive force of the permanent magnet type electric rotary machine 103 of expression said structure, and transverse axis is represented rotor-position, and the longitudinal axis is represented the induced electromotive force of stator winding 117.Also be to use the measurement result of the rotor core 109 of the condition identical with Figure 18 at Figure 19, in Figure 19 (A)～(C), the induced electromotive force of the longitudinal axis, with use be the 1st rotor core 110A that does not have the space shown in Figure 19 (A) the time maximum represent relatively as 1p.u..
Its measurement result, in Figure 19 (A), the effective value of the first-harmonic of waveform is that 0.73p.u., distortion factor of a wave are 5.6%, in Figure 19 (B), the effective value of the first-harmonic of waveform is that 0.72p.u., distortion factor of a wave are 4.9%.And in Figure 19 (C), the effective value of the first-harmonic of waveform is that 0.72p.u., distortion factor of a wave are 2.2%, distortion factor of a wave can be reduced to below half.
But, because electro-magnetic exciting force as the one of the main reasons of the noise in the operation process that produces permanent magnet type electric rotary machine 103, be directly proportional with the quadratic power of rotor 107, so just can reduce electro-magnetic exciting force as long as reduce the magnetic density in circumferencial direction gap with the density of the magnetic flux in the gap of the circumferencial direction of stator 108.But,, be most important so only reduce the high order harmonic component magnetic flux that is included in the fundamental flux amount because output is reduced if reduce the fundamental flux amount.Thereby, in order to realize quietization, as long as change the converter of the energising of 180 degree into drives from 120 degree step modes, the potential difference of the voltage (output voltage of converter) that is added on the stator winding 117 and induced electromotive force produces but because the electric current that flows in stator winding 117 is based on, so even the voltage that will be added on the stator winding 117 is made as sine wave (180 degree energising), if but the induced electromotive force waveform of permanent magnet type electric rotary machine 103 is not sinusoidal wave, just comprise the high order harmonic component composition in the electric current that in stator winding 117, flows, in electric rotating machine, just produce the high order harmonic component quantity of magnetism.Thereby in order to reduce electro-magnetic exciting force, the distortion factor of a wave of induced electromotive force is the smaller the better.
As mentioned above, because the structure of the rotor core 109 by becoming present embodiment can reduce the distortion factor of a wave of induced electromotive force,, simultaneously, can make induced electromotive force again near sinusoidal wave so can obviously reduce pulsating torque.Its result need not reduce output and just can reduce electro-magnetic exciting force, can realize the low noiseization of permanent magnet type electric rotary machine 103.
In addition, in the present embodiment, because concentrate winding stator winding 117, so the size of induced electromotive force is by the magnetic flux decision that flows into tooth portion 119 in the mode in the tooth portion 119 of stator core 116.Thereby, the magnetic pole angle θ of rotor core 109 preferably a separation, be electrical degree be 120 the degree below.On the other hand, because if make the magnetic saturation of the narrow then rotor core 109 of magnetic pole angle θ that magnetic resistance is increased, the magnetic flux that flows into tooth portion 119 reduces, be preferably more than 90 degree so confirm electrical degree.As mentioned above as can be known, the magnetic pole angle θ of rotor core 109, electrical degree is adapted in the scope of 90～120 degree.
Figure 20 is the schematic diagram of the embodiment 10 of expression permanent magnet type electric rotary machine of the present invention.Because general structure is identical with embodiment 1, so same section is represented with same-sign.The difference of present embodiment and embodiment 1 is the laminated configuration of the 1st rotor core 110A and the 2nd rotor core 110B.
Promptly, in embodiment 1, carry out the 1st rotor core 110A and the 2nd rotor core 110B simple abutment stacked, but in the present embodiment, the 1st rotor core 110A that will not have a space at the outside diameter of permanent magnet 112 is 2 parts and form the 1st rotor core unit 110a and the 2nd rotor core unit 110b separately, are layered in the both sides of the 2nd rotor core 110B by the 1st rotor core unit 110a and the 2nd rotor core unit 110b.
Like this, even be divided into rotor core 109 a plurality of and it is made up,, also can access identical effect as long as stacked ratio is identical with embodiment 9.
In addition, in the various embodiments described above, the stacked ratio of the 1st rotor core 110A and the 2nd rotor core 110B is made as 3: 2 (60%: 40%), but its stacked ratio neither be fixed, and must be changed to the best ratio of efficient according to the shape of the component parts of the permanent magnet type electric rotary machine 103 that uses object etc.
In addition, the structure of the permanent magnet 112 that is in-line to 1 cross section of per 1 utmost point installation in the various embodiments described above is illustrated, and the cross sectional shape of the permanent magnet of per 1 utmost point and pack into quantity even configuration etc. are not specific to the various embodiments described above, for example, also can be the structure of embodiment shown in Figure 21 11.In Figure 21, because the symbolic representation same parts identical with described embodiment, so omit repeat specification.
In the present embodiment, constitute the permanent magnet 112 that axially is installed in per 1 utmost point on the rotor core 109, and these 2 permanent magnet 112A, 112B are configured to the V font, also can access the effect equal with the various embodiments described above by 2 permanent magnet 112A, 112B.
And then, in the various embodiments described above, be formed on the space 114 of the 2nd rotor core 110B, be 1 of per 1 utmost point, its shape is long along the footpath direction, and has the shape that becomes the cross section of object relatively by the d axle of pole center, and the cross sectional shape in the space of per 1 utmost point and quantity even configuration etc. are not also specific to the various embodiments described above, for example, also can be the structure of embodiment shown in Figure 22 12.In Figure 22, because the symbolic representation same parts identical with described embodiment, so omit repeat specification.
In the present embodiment, with relative pole center symmetry, be formed on the rotor core stacked direction, can play the effect equal with the various embodiments described above at footpath direction long 2 space 114A, 114B.
(invention effect)
As mentioned above, according to the present invention, because in interior week of the T shaped part of stator that adopt to concentrate winding Impose on the face and cut sth. askew, and can on direction of principal axis, stagger in the circumferential direction of the circle by the magnetic pole piece that makes rotor and make Pulsating torque during running reduces by half, so a kind of permanent magnet type electric rotary machine of low noise can be provided.
In addition, according to the present invention, the generation torque in the time of need not reducing to turn round just can access and can reduce Pulsating torque and electro-magnetic exciting force also reduce the permanent magnet type electric rotary machine of noise.
Claims (8)
1. permanent magnet type electric rotary machine, have the stator that concentrate to twine stator winding on the stator core with Zhou Fangxiang spaced apart relative with this stator with gap to and on rotor core, axially permanent magnet is installed and is formed the rotor of magnetic pole, it is characterized in that:
Above-mentioned rotor core is that axially stacked the 1st rotor core and the 2nd rotor core constitute, and at the outside diameter of the above-mentioned permanent magnet of above-mentioned the 2nd rotor core, is formed with the space of relative pole center symmetry along the rotor core stacked direction.
2. permanent magnet type electric rotary machine, have the stator that concentrate to twine stator winding on the stator core with Zhou Fangxiang spaced apart relative with this stator with gap to and on rotor core, axially permanent magnet is installed and is formed the rotor of magnetic pole, it is characterized in that:
Above-mentioned rotor core, being formed with and being in electrical degree in the magnetic pole angle is to suppress the structure of the short circuit flux amount between the adjacent pole in 90～120 degree scopes, and axially stacked the 1st rotor core and the 2nd rotor core constitute, at the outside diameter of the above-mentioned permanent magnet of above-mentioned the 2nd rotor core, be formed with the space of relative pole center symmetry along the rotor core stacked direction.
3. permanent magnet type electric rotary machine as claimed in claim 2 is characterized in that: suppressing the structure of above-mentioned short circuit flux amount, is from the groove of outside diameter to the V font of internal side diameter incision.
4. permanent magnet type electric rotary machine, have the stator that concentrate to twine stator winding on the stator core with Zhou Fangxiang spaced apart relative with this stator with gap to and on rotor core, axially permanent magnet is installed and is formed the rotor of magnetic pole, it is characterized in that:
Above-mentioned rotor core, be that axially stacked the 1st rotor core and the 2nd rotor core constitute, above-mentioned the 1st rotor core is made of the 1st rotor core unit and the 2nd rotor core unit, these the 1st and the 2nd rotor core unit are laminated in the both sides of above-mentioned the 2nd rotor core, at the outside diameter of the above-mentioned permanent magnet of above-mentioned the 2nd rotor core, be formed with the space of relative pole center symmetry along the rotor core stacked direction.
5. as any described permanent magnet type electric rotary machine in the claim 1,2,3 or 4, it is characterized in that: above-mentioned space, with by forming from the magnetic flux of rotor magnetic pole, the mode of covering from the magnetic flux of stator.
6. as any described permanent magnet type electric rotary machine in the claim 1,2,3 or 4, it is characterized in that: concentrate to twine the said stator winding the said stator iron core, relative with above-mentioned rotor core to tooth portion, with more to the both end sides of Zhou Fangxiang, and the wide more mode in the gap of above-mentioned rotor core form.
7. permanent magnet type electric rotary machine, have the stator that concentrate to twine stator winding on the stator core with Zhou Fangxiang spaced apart relative with this stator with gap to and on rotor core, axially permanent magnet is installed and is formed the rotor of magnetic pole, it is characterized in that:
The said stator iron core relative with above-mentioned rotor core to tooth portion, to get over both end sides to Zhou Fangxiang, the mode wide more with the gap of above-mentioned rotor core forms, above-mentioned rotor core, axially stackedly be formed with that to be in electrical degree in the magnetic pole angle be that the 1st rotor core and the 2nd rotor core that suppresses the structure of the short circuit flux amount between the adjacent pole in 90～120 degree scopes constitutes, above-mentioned the 1st rotor core, constitute by the 1st rotor core unit and the 2nd rotor core unit, these the 1st and the 2nd rotor core unit are laminated in the both sides of above-mentioned the 2nd rotor core, above-mentioned the 2nd rotor core, on the outside diameter position of above-mentioned permanent magnet, form relative pole center symmetry along the rotor core stacked direction, and the space that has long cross section in the footpath direction.
8. compressor is characterized in that: use in the claim 1～4 or 7 any described permanent magnet type electric rotary machine as drive motor.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002203401A JP3938726B2 (en) | 2002-07-12 | 2002-07-12 | Permanent magnet type rotating electric machine and compressor using the same |
| JP2002203401 | 2002-07-12 | ||
| JP2003019878 | 2003-01-29 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03147457 Division CN1278472C (en) | 2002-07-12 | 2003-07-11 | Permanent magnet type rotary motor and compressor using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1808844A true CN1808844A (en) | 2006-07-26 |
| CN100546149C CN100546149C (en) | 2009-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100228979A Expired - Lifetime CN100546149C (en) | 2002-07-12 | 2003-07-11 | Permanent magnet type electric rotary machine and use the compressor of this motor |
| CN200610115650A Expired - Lifetime CN100594651C (en) | 2002-07-12 | 2003-07-11 | Permanent magnet type rotary electric machine |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610115650A Expired - Lifetime CN100594651C (en) | 2002-07-12 | 2003-07-11 | Permanent magnet type rotary electric machine |
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| Country | Link |
|---|---|
| JP (1) | JP3938726B2 (en) |
| CN (2) | CN100546149C (en) |
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| CN102916547A (en) * | 2012-10-23 | 2013-02-06 | 浙江西子富沃德电机有限公司 | Permanent magnet synchronous motor for electric forklift |
| CN103956874A (en) * | 2014-04-25 | 2014-07-30 | 联合汽车电子有限公司 | Permanent magnet synchronous motor and rotor thereof |
| CN111917198A (en) * | 2019-05-08 | 2020-11-10 | 松下知识产权经营株式会社 | Stator and motor |
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| JP2006101606A (en) * | 2004-09-29 | 2006-04-13 | Hitachi Industrial Equipment Systems Co Ltd | Permanent magnet rotating electrical machine and compressor using the same |
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| KR101106647B1 (en) | 2007-06-05 | 2012-01-18 | 삼성전자주식회사 | Permanent magnet motor |
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| US20100277027A1 (en) * | 2009-04-30 | 2010-11-04 | Gm Global Technology Operations, Inc. | Skew pattern for a permanent magnet rotor |
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2002
- 2002-07-12 JP JP2002203401A patent/JP3938726B2/en not_active Expired - Lifetime
-
2003
- 2003-07-11 CN CNB2005100228979A patent/CN100546149C/en not_active Expired - Lifetime
- 2003-07-11 CN CN200610115650A patent/CN100594651C/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916547A (en) * | 2012-10-23 | 2013-02-06 | 浙江西子富沃德电机有限公司 | Permanent magnet synchronous motor for electric forklift |
| CN102916547B (en) * | 2012-10-23 | 2015-06-10 | 浙江西子富沃德电机有限公司 | Permanent magnet synchronous motor for electric forklift |
| CN103956874A (en) * | 2014-04-25 | 2014-07-30 | 联合汽车电子有限公司 | Permanent magnet synchronous motor and rotor thereof |
| CN111917198A (en) * | 2019-05-08 | 2020-11-10 | 松下知识产权经营株式会社 | Stator and motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101039047A (en) | 2007-09-19 |
| CN100594651C (en) | 2010-03-17 |
| JP2004048912A (en) | 2004-02-12 |
| CN100546149C (en) | 2009-09-30 |
| JP3938726B2 (en) | 2007-06-27 |
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