CN101741179A - Motor structure with rotation detector - Google Patents

Motor structure with rotation detector Download PDF

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Publication number
CN101741179A
CN101741179A CN 200910211417 CN200910211417A CN101741179A CN 101741179 A CN101741179 A CN 101741179A CN 200910211417 CN200910211417 CN 200910211417 CN 200910211417 A CN200910211417 A CN 200910211417A CN 101741179 A CN101741179 A CN 101741179A
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CN
China
Prior art keywords
resolver
mentioned
motor
rotor
stator
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Granted
Application number
CN 200910211417
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Chinese (zh)
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CN101741179B (en
Inventor
宫嵜洋彰
中村健英
井上智昭
中村孝弘
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Aisan Industry Co Ltd
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Aisan Industry Co Ltd
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Publication of CN101741179A publication Critical patent/CN101741179A/en
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Publication of CN101741179B publication Critical patent/CN101741179B/en
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    • Y02T10/641—

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  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

A casing of a motor with resolver includes a stator, a motor shaft rotatably supported by a bearing, a motor rotor integrally rotatable with the motor shaft, and a resolver for detecting a rotation angle of the motor rotor. The resolver includes a disc-shaped resolver stator held on the motor casing and having a surface on which a thin-film-shaped coil is formed, and a disc-shaped resolver rotor provided on an end face of the motor rotor and having a surface on which a thin-film-shaped coil is formed. Part of the motor casing holding the outer periphery of the resolver stator is formed as a shield portion cylindrically protruding along the outer periphery of the resolver rotor to the rotor. The motor casing and the shield portion are each made of a non-magnetic conductive material.

Description

The motor structure of band rotation detector
Technical field
The present invention relates to a kind of motor structure with rotation detector, it comprises housing, be arranged at stator in the housing and bearing, be subjected to housing supporting and the rotating shaft that can rotate freely with respect to housing, the rotor that can be provided with rotatably with the rotating shaft one and the resolver that is used for the anglec of rotation of detection rotor by bearing.
Background technology
In the prior art, in hybrid vehicle, electric automobile, use the brushless motor of high-output power.In order to control the brushless motor of hybrid vehicle, need correctly grasp the position of rotation of the output shaft of motor.Its reason is, controlled for the energising of each coil of stator is switched, and need correctly grasp the position of rotation of rotor.Particularly in automobile, owing to slot effect makes the cornering ability relatively poor slot effect of expecting to reduce that becomes, therefore, the urgent expectation switching of correctly switching on.
At this, for the position probing of the motor reel of automobile, in order to satisfy functions such as heat-resisting quantity, noise tolerance, vibration resistance, anti-height be moist, the existing use has resolver.Resolver is assembled in the inside of motor, directly is installed on the armature spindle of motor.
Figure 33 represents the cutaway view of the motor 200 of disclosed band rotation detector in the patent documentation 1.Be set with stator 202 interior week at housing 208.End at stator 202 is equipped with busbar (bus bar) 201, is set with resolver stator 203 at interior all end faces of busbar 201.Resolver stator 203 comprises the resolver stator coil 204 of coiling.
On the other hand, in housing 208, be set with pair of bearings 209, utilize the rotating shaft 205 of pair of bearings 209 supporting rotors 206, make rotating shaft 205 rotations free.On rotating shaft 105, be provided with resolver rotor 207 with fixed-site that resolver stator 203 is faced mutually.Constitute resolver by resolver stator 203 and resolver rotor 207 as resolver.
In patent documentation 2, also record the invention same with patent documentation 1.The difference of the invention of the invention of patent documentation 2 and patent documentation 1 is, with respect in patent documentation 1 resolver stator 203 being attached on the busbar 201, in patent documentation 2 the resolver stator is fixed in housing.
On the other hand, thus in the invention of patent documentation 3, disclose by the excitation signal that has used by high frequency modulated and reduce the invention that the coil turn of resolver stator reduces cost.In the invention of patent documentation 3, also disclose,, owing to can reduce the number of turn, therefore, can not use coiled wire-wound coil and use the coil of sheet, can seek the miniaturization of resolver if adopt the invention of patent documentation 3.
Patent documentation 1: TOHKEMY 2007-124757 communique
Patent documentation 2: Japanese kokai publication hei 09-065617 communique
Patent documentation 3: TOHKEMY 2000-292205 communique
But, in the structure of the motor 100 of in the past band rotation detector, have following problem.
(1) in the motor structure of the band rotation detector of patent documentation 1 and patent documentation 2, because when resolver rotor 207 is faced mutually with the resolver stator 203 that is wound with resolver stator coil 204, has roughly the same width with resolver stator 203, therefore, cause the length on the axis direction of rotating shaft 205 to become big.Therefore, exist motor integral body on the axis direction of rotating shaft, to become big problem.
(2) in addition, because excitation in the frequency domain of 8～10kHz, therefore, be subjected to the influence of interference electromagnetic noise (being to be the noise of 7.2kHz frequency under the situation of 18000rpm, 4 pairs of the NS utmost points, 6 slot motors (6-slot motor) motor at motor speed) easily from motor, owing to also have iron core (auxiliary wick), therefore, the magnetic field that is produced by motor stator 202 brings bigger noise for resolver stator coil 204.Therefore, the problem that has the angle accuracy of detection reduction of resolver.
In the invention of patent documentation 1 and patent documentation 2, in order to reduce The noise, resolver must be arranged on position away from motor stator, exist the length on the motor axis direction to become big problem.
(3) in addition, the magnetic field that also exists reason motor stator 102 to produce becomes noise and resolver stator 103 and resolver rotor 107 is produced dysgenic problem.Therefore, might reduce the angle accuracy of detection of resolver.
(4) in the motor structure of the band rotation detector of patent documentation 3, though by reducing the number of turn, can realize reducing cost, but owing to have auxiliary wick, therefore, the magnetic field that is produced by motor stator is passed through to bring noise for the chip coil of resolver stator in the auxiliary wick easily, therefore, the problem that has the angle accuracy of detection reduction of resolver.
(5) in addition, when resolver accepted to have the upset magnetic field of high magnetic flux density, in case the iron core magnetic saturation, then resolver did not have with regard to method and brings into play its function fully.
Summary of the invention
Therefore, the present invention makes in order to address the above problem a little, and its purpose is to provide a kind of motor structure that can shorten the band rotation detector of the length of motor on the axis direction of rotating shaft.In addition, another object of the present invention is to provide a kind of motor structure of band rotation detector of the angle accuracy of detection that can improve resolver.
For the motor structure that addresses the above problem the band rotation detector of a little making of the present invention has following structure.
(1) a kind of motor structure with rotation detector, it is characterized in that, the motor structure of this band rotation detector comprises housing, be arranged at the stator in the housing, be arranged at the bearing in the housing, the rotating shaft that is supported on housing and can rotates freely with respect to housing by bearing, rotor that can be provided with rotatably with the rotating shaft one and the resolver that is used for the anglec of rotation of detection rotor, resolver comprises the discoideus resolver stator component that is subjected to keep and be formed with on the surface at housing the film like coil, be arranged at the end face of rotor and be formed with the discoideus resolver rotor component of film like coil on the surface.
(2) in the motor structure of the band rotation detector described in (1), it is characterized in that the film like coil that is formed on the resolver rotor component utilizes ink-jet printer to form as Thinfilm pattern on the surface of resolver rotor component.
(3) in the motor structure of the band rotation detector described in (2), it is characterized in that, utilize ink-jet printer will in dispersant, disperse the black liquid of silver particles to be coated on the resolver rotor component, fire then, thereby Thinfilm pattern fixedly is attached on the resolver rotor component.
(4) in (1)～(3), in the motor of each the described band rotation detector structure, it is characterized in that, between rotor and resolver rotor component, be provided with shield member.
(5) in the motor structure of the band rotation detector described in (4), it is characterized in that shield member is copper coin or copper facing.
(6) in (1)～(5), in the motor of each the described band rotation detector structure, it is characterized in that resolver stator component and bearing are located with respect to housing.
(7) during the motor of each described band rotation detector is constructed in (1)～(6), it is characterized in that a part that makes the housing that resolver stator component periphery is kept projects to the resolver rotor component and forms shielding part with cylindrical shape along the periphery of resolver rotor component.
(8) in the motor structure of the band rotation detector described in (7), it is characterized in that housing and shielding part are formed by nonmagnetic conductive material.
(9) in the motor structure of the band rotation detector described in (7), it is characterized in that housing and shielding part are formed by magnetic.
(10) during the motor of each described band rotation detector is constructed in (1)～(6), it is characterized in that, be provided with columnar shield member to the resolver rotor component in a part from housing that resolver stator component periphery is kept.
(11) in the motor structure of the band rotation detector described in (10), it is characterized in that shield member is formed by nonmagnetic conductive material.
(12) in the motor structure of the band rotation detector described in (10), it is characterized in that shield member is formed by magnetic.
(13) in the motor structure of the band rotation detector described in (4), it is characterized in that, the outer peripheral edges that are arranged on the shield member between rotor and the resolver rotor component are projected near the resolver stator component with cylindric along the periphery of resolver rotor component.
(14) in the motor structure of the band rotation detector described in (13), it is characterized in that shield member is formed by nonmagnetic conductive material.
(15) in the motor structure of the band rotation detector described in (13), it is characterized in that shield member is formed by magnetic.
(16) a kind of motor structure with rotation detector, it is characterized in that, the motor structure of this band rotation detector comprises the housing that is set with motor stator and bearing, with have rotation and freely be supported on the rotating shaft of the motor rotor of this bearing, in order to detect the anglec of rotation of above-mentioned motor rotor, the resolver stator of resolver is attached to above-mentioned housing, the resolver rotor is attached to above-mentioned motor rotor, above-mentioned resolver rotor is constituted and is arranged on the end face of above-mentioned motor rotor by hollow coil, above-mentioned resolver stator is made of hollow coil.
(17) in the motor structure of the band rotation detector described in (16), it is characterized in that between the end face of above-mentioned resolver rotor and above-mentioned motor rotor, having the nonmagnetic material flat board.
(18) in the motor structure of the band rotation detector described in (16) or (17), it is characterized in that above-mentioned hollow coil is formed by conductive ink.
(19) in the motor structure of the band rotation detector described in (18), it is characterized in that, above-mentioned hollow coil has the structure that SIN coil layer, the 1st insulating barrier, wire jumper layer, the 2nd insulating barrier, COS coil layer are laminated, above-mentioned each layer has through hole respectively, be in above-mentioned each layer upside the layer above-mentioned conductive ink by above-mentioned through hole be in downside layer above-mentioned conductive ink be connected.
(20) in (16)～(19), in the motor of each the described band rotation detector structure, it is characterized in that,, use the signal of 300kHz～500kHz or the signal of 1.8MHz～2.7MHz as the excitation signal of above-mentioned resolver stator.
Then, effect and the effect to the motor structure of band rotation detector of the present invention with above-mentioned structure describes.
(1) motor of band rotation detector of the present invention structure comprises housing, be arranged at the stator in the housing, be arranged at the bearing in the housing, be supported on housing and the rotating shaft that rotates freely of housing relatively by bearing, rotor that can be provided with rotatably with the rotating shaft one and the resolver that is used for the anglec of rotation of detection rotor, wherein, resolver comprises the discoideus resolver stator component that is subjected to housing to keep and be formed with on the surface film like coil, be arranged at the end face of rotor and be formed with the discoideus resolver rotor component of film like coil on the surface, thereby, with the configuration over the ground of on the axis direction of rotating shaft, practising physiognomy of the resolver stator component of film like and resolver rotor component, therefore, can shorten resolver shared length on the axis direction of rotating shaft.
(2) in addition, the film like coil that utilizes ink-jet printer will be formed on the resolver rotor component forms Thinfilm pattern on the surface of resolver rotor component, therefore, can accurately Thinfilm pattern be formed the thickness below the 10 μ m, and, the Thinfilm pattern of correct width can be formed, therefore, the precision of resolver can be improved.
(3) and, utilize ink-jet printer will in dispersant, disperse the black liquid of silver particles to be coated on the resolver rotor component, fire then, thereby Thinfilm pattern fixedly is attached on the resolver rotor component, therefore, Thinfilm pattern can be fixed on the resolver rotor component reliably.
(4) in addition, owing between rotor and resolver rotor component, have shield member, thereby the influence that seldom is subjected to the influence that brings by the magnetic field that the permanent magnet that is installed in the resolver rotor component produces and brings by the magnetic field that the existence that the stator of motor produces changes, therefore, can detect the anglec of rotation accurately.And,, therefore, can shield the magnetic line of force fully because shield member is copper coin or copper facing.
(5) in addition, resolver stator component and bearing are located with respect to housing, therefore, can determine that accurately the resolver rotor component and the position between the resolver stator component that utilize rotating shaft to obtain positional precision concern by housing and bearing.
(6) in addition, a part that makes the housing that resolver stator component periphery is kept projects to the resolver rotor component and forms shielding part with cylindrical shape along the periphery of resolver rotor component, therefore, resolver stator component and resolver rotor component be less to be subjected to the influence that bring in magnetic field that existence that the stator by motor produces changes, can detect the anglec of rotation accurately.
(7) in addition, a part that makes the housing that resolver stator component periphery is kept projects to the resolver rotor component and forms shielding part with cylindrical shape along the periphery of resolver rotor component, housing and shielding part are formed by nonmagnetic conductive material, therefore, the magnetic field that the existence that is produced by the stator of motor changes is converted into vortex flow and becomes heat in shielding part, resolver stator component and resolver rotor component be less to be subjected to the influence that bring in magnetic field, can detect the anglec of rotation accurately.
(8) in addition, a part that makes the housing that resolver stator component periphery is kept projects to the resolver rotor component and forms shielding part with cylindrical shape along the periphery of resolver rotor component, housing and shielding part are formed by magnetic, therefore, resolver stator component and resolver rotor component be less to be subjected to the influence that bring in magnetic field that existence that the stator by motor produces changes, can detect the anglec of rotation accurately.
(9) in addition, be provided with columnar shield member in a part to the resolver rotor component from housing that resolver stator component periphery is kept, therefore, resolver stator component and resolver rotor component be less to be subjected to the influence that bring in magnetic field that existence that the stator by motor produces changes, can detect the anglec of rotation accurately.In addition, the material that shield effectiveness can be better than the shield effectiveness of housing is used for shield member.
(10) in addition, be provided with columnar shield member in a part to the resolver rotor component from the housing that keeps for resolver stator component periphery, this shield member is formed by nonmagnetic conductive material, therefore, the magnetic field that the existence that is produced by the stator of motor changes is converted into vortex flow and becomes heat in shield member, resolver stator component and resolver rotor component be less to be subjected to the influence that bring in magnetic field, can detect the anglec of rotation accurately.In addition, the material that shield effectiveness can be better than the shield effectiveness of housing is used for shield member.
(11) in addition, be provided with columnar shield member in a part to the resolver rotor component from housing that resolver stator component periphery is kept, this shield member is formed by magnetic, therefore, resolver stator component and resolver rotor component be less to be subjected to the influence that bring in magnetic field that existence that the stator by motor produces changes, can detect the anglec of rotation accurately.In addition, the material that shield effectiveness can be better than the shield effectiveness of housing is used for shield member.
(12) in addition, the outer peripheral edges that are arranged on the shield member between rotor and the resolver rotor component are projected near the resolver stator component with cylindric along the periphery of resolver rotor component, therefore, resolver stator component and resolver rotor component be less to be subjected to the influence that bring in magnetic field that existence that the stator by motor produces changes, can detect the anglec of rotation accurately.
(13) in addition, the outer peripheral edges that are arranged on the shield member between rotor and the resolver rotor component are projected near the resolver stator component with cylindric along the periphery of resolver rotor component, shield member is formed by nonmagnetic conductive material, therefore, the magnetic field that the existence that is produced by the stator of motor changes is converted into vortex flow and becomes heat in shield member, resolver stator component and resolver rotor component be less to be subjected to the influence that bring in magnetic field, can detect the anglec of rotation accurately.
(14) and, the outer peripheral edges that are arranged on the shield member between rotor and the resolver rotor component are projected near the resolver stator component with cylindric along the periphery of resolver rotor component, shield member is formed by magnetic, therefore, resolver stator component and resolver rotor component be less to be subjected to the influence that bring in magnetic field that existence that the stator by motor produces changes, can detect the anglec of rotation accurately.
(15) the motor structure of band rotation detector comprises the housing that is set with motor stator and bearing, with have rotation and freely be supported on the rotating shaft of the motor rotor of this bearing, in order to detect the anglec of rotation of above-mentioned motor rotor, the resolver stator of resolver is attached to above-mentioned housing, the resolver rotor is attached to above-mentioned motor rotor, wherein, above-mentioned resolver rotor is constituted and is arranged on the end face of above-mentioned motor rotor by hollow coil, above-mentioned resolver stator is made of hollow coil, therefore, by removing auxiliary wick, the situation that magnetic field that motor stator produces exerts an influence to the resolver stator by auxiliary wick can not appear, even the resolver stator is exerted an influence, the electric moter noise maximum is also just about 7.2kHz, and signals of rotating transformer is 500kHz, therefore, can use high pass filter easily to remove denoising, can not reduce the angle accuracy of detection of resolver.At this, the reason that can remove auxiliary wick is, because with the high frequency excitation of 500kHz, so the degree of coupling rises, even without auxiliary wick, and also transmission signals fully.
In addition, even when resolver is accepted to have the disturbing magnetic field of high magnetic flux density, owing to there is not iron core, therefore, the iron core magnetic saturation can not occur, resolver can normally be brought into play function all the time.
In addition,, the number of turn of resolver stator can be reduced to several circles, therefore, be not easy to be subjected to the following noise effect of 100kHz owing to adopt high frequency.
In addition, dispose over the ground, therefore, can shorten resolver shared length on the axis direction of rotating shaft because the resolver stator of film like and resolver rotor practised physiognomy on the axis direction of rotating shaft.
(16) the present invention is a feature to have the nonmagnetic material flat board between the end face of resolver rotor and motor rotor also, therefore, the magnetic flux that is produced by motor stator produces vortex flow and is converted into heat on the surface of nonmagnetic material flat board, therefore, can reduce the magnetic flux that arrives the resolver stator, can reduce the noise that the resolver stator is subjected to from motor stator, can not reduce the angle accuracy of detection of resolver.And,, therefore, can shield the magnetic line of force fully because shield member is copper coin or copper facing.
(17) the present invention also forms feature with hollow coil by conductive ink, therefore, can form hollow coil accurately, and, owing to can form the Thinfilm pattern of correct width, therefore, can improve the precision of resolver.
And, black liquid by utilizing ink-jet printer on the resolver rotor component, to be coated in to have disperseed silver particles in the dispersant, fire then and Thinfilm pattern fixedly is attached to the resolver rotor component, therefore, Thinfilm pattern can be fixed on the resolver rotor component effectively.Hollow coil is not limited to film, also can the etching Copper Foil and form.
(18) feature of the present invention also is, hollow coil has SIN coil layer, the 1st insulating barrier, wire jumper layer, the 2nd insulating barrier, the stacked structure of COS coil layer, above-mentioned each layer has through hole, the conductive ink that is in the layer of above-mentioned each layer upside is connected by the above-mentioned conductive ink of through hole with the layer that is in downside, therefore, only, just can make the resolver stator efficiently by forming each layer and utilizing ink-jet to form hollow coil, therefore, can reduce manufacturing cost.
(19) feature of the present invention also is, excitation signal as the resolver stator, use the signal of 300kHz～500kHz or the signal of 1.8MHz～2.7MHz, therefore, in automobile, seldom ((2MHz～26MHz) brings radio noise for 531kHz～1602kHz) and short-wave radio to the AM radio.That is, because the AM radio is to use in the zone more than 500kHz, therefore, so long as the following excitation signal of 500kHz just seldom brings noise to radio.Under the condition of 500kHz, the S/N of resolver of the present invention (signal to noise ratio) is than enough big.Under the condition of 300kHz, though S/N is than about 1/2 of the S/N ratio that is reduced to 500kHz, but still in usage range.
In addition, owing to use the above excitation signal of 300kHz, can utilize high pass filter easily to filter electric moter noise about 10kHz, therefore, can improve the angle accuracy of detection of resolver.
Description of drawings
Fig. 1 is the cutaway view of the motor structure that is built-in with resolver of expression the 1st execution mode.
Fig. 2 is the vertical view of this resolver rotor component of expression.
Fig. 3 be the expression this resolver rotor component Fig. 2 in the A-A cutaway view.
Fig. 4 is the figure of this resolver stator the 1st pattern of expression.
Fig. 5 is the figure of this resolver stator the 2nd pattern of expression.
Fig. 6 is the circuit block diagram of the control structure of this resolver of expression.
Fig. 7 is the cutaway view of the motor structure that is built-in with resolver of expression the 2nd execution mode.
Fig. 8 is the cutaway view of the motor structure that is built-in with resolver of expression the 3rd execution mode.
Fig. 9 is the cutaway view of the motor structure that is built-in with resolver of expression the 4th execution mode.
Figure 10 is the cutaway view of the part of this motor structure of expression.
Figure 11 is the amplification view of the part of this motor structure of expression.
Figure 12 is the cutaway view of a part of the motor structure of expression the 5th execution mode.
Figure 13 is the cutaway view of a part of the motor structure of expression the 6th execution mode.
Figure 14 is the cutaway view of a part of the motor structure of expression the 7th execution mode.
Figure 15 is the cutaway view of the motor structure that is built-in with resolver of expression the 8th execution mode.
Figure 16 is the vertical view of resolver stator 77.
Figure 17 is the A portion enlarged drawing of Figure 16.
Figure 18 is the B portion enlarged drawing of Figure 16.
Figure 19 is the figure that is formed with base coating 103 on base plate 102.
Figure 20 is the figure of the structure of expression SIN signal magnet exciting coil 91.
Figure 21 is the figure of expression insulating coating 110.
Figure 22 is the figure of expression wire jumper 128,129.
Figure 23 is the figure of expression insulating coating 120.
Figure 24 is the figure of the structure of expression COS signal magnet exciting coil 92.
Figure 25 is the figure that applies the portion of terminal bonding agent.
Figure 26 is the figure of expression diaphragm 131.
Figure 27 is the cross-sectional schematic of each layer of expression structure.
Figure 28 is the figure of the control structure of expression resolver.
Figure 29 is the figure of the structure of expression resolver rotor 93.
Figure 30 is the figure of the interference magnetic flux in the expression real vehicle.
Figure 31 is that the datagram of magnetic flux to the influence of detection angles disturbed in expression.
Figure 32 is that the datagram of magnetic flux to the influence of resolver generation disturbed in expression.
Figure 33 is a cutaway view of representing the motor structure that is built-in with resolver in the past.
Embodiment
The 1st execution mode
Below, describe in detail with reference to accompanying drawing and to have the 1st execution mode of having specialized as the motor structure of the resolver of rotation detector of the present invention.
Fig. 1 represents to be built-in with the structure of motor of the band rotation detector of present embodiment with cutaway view.The housing in the outside is made of motor field frame 11 and lid housing 20.Be set with motor stator 12 in the inboard of motor field frame 11.In addition, bearing 21 is installed in motor field frame 11.Inboard at lid housing 20 also is equipped with bearing 21, utilizes pair of bearings 21, will keep to such an extent that can rotate as the motor reel 13 of rotating shaft.
On motor reel 13, across guiding piece 14 motor rotor 15 is installed, at motor rotor 15 internal fixation permanent magnet 16 is arranged.The left side of motor rotor 15 is connected to guiding piece 14.Butt is equipped with barricade 18 in the right side of motor rotor 15.Barricade 18 is a copper plates.On the right side of barricade 18 resolver rotor component 19 is installed.About resolver rotor component 19, see the aftermentioned explanation for details.
In motor reel 13, be formed with the diameter little end difference 13a of diameter than the part that cooperates with guiding piece 14.And, be formed with the diameter path end difference 13b littler than the diameter of end difference 13a on the right side of end difference 13a.On end difference 13a, be combined with stop part 17.Right-hand member at stop part 17 is formed with caulking part 17a.Path end difference 13b is connected to the side of the interior side ring of bearing 21 across separator 22.
Assembling guiding piece 14 on motor reel 13, assembling motor rotor 15 on guiding piece 14.Then, under the state of the periphery of the caulking part 17a that barricade 18 and resolver rotor component 19 is assemblied in stop part 17, the caulking part 17a that makes stop part 17 utilizes not shown clincher tool that they are riveted toward the outer side.Thus, guiding piece 14, motor rotor 15, barricade 18 and resolver rotor component 19 are fixed in motor reel 13.
At this moment, because clincher tool is riveted caulking part 17a equably, therefore, resolver rotor component 19 can be installed with higher precision with respect to the axle center of motor reel 13.
On the other hand, the inner surface positioning and fixing at lid housing 20 has resolver stator component 23.About resolver stator component 23, see the aftermentioned explanation for details.
Then, resolver rotor component 19 is described.Fig. 2 represents the vertical view of resolver rotor component 19, and Fig. 3 represents resolver rotor component 19 by the A-A cutaway view among Fig. 2.
Resolver rotor component 19 is the circular plate shape that is formed with circular centre bore at the center.Diameter is 100～150mm.The material of resolver rotor component 19 is PPS resin or LCP liquid crystal polymer, and its thickness is 3～5mm.
On a surface of resolver rotor component 19, be formed with the 4 resolver rotor pattern 30A of place, 30B, 30C, 30D (following also be referred to as " resolver rotor pattern 30 ").Near the center of resolver rotor component 19, also be formed with resolver pattern 31.Utilize ink-jet printer to form resolver rotor pattern 30 and resolver pattern 31.As China ink, use be the silver paste that in dispersant, disperses silver particles to form.After applying silver paste, fires the thickness with 10～20 μ m.Make the dispersant distillation by firing, fixedly adhere to the silver-colored film that thickness is 2～5 μ m on the surface of resolver rotor component 19.The width of resolver stator the 1st pattern 51, resolver pattern 57 and resolver the 2nd pattern 52 is 0.5mm.
Be formed with thickness on the surface of resolver rotor pattern 30 and resolver pattern 31 and be the insulating barrier that constitutes by polyimides of 10 μ m.This insulating barrier also is to fire to form after coating polyimide.
Inside at the resolver rotor component 19 that forms, be built-in with auxiliary wick 42 by embedding shaping with the corresponding position, centre position that is rotated 30 encirclements of transformer rotor pattern, be built-in with auxiliary wick 41 with resolver pattern 31 corresponding positions.Auxiliary wick 42 is used to strengthen the magnetic field that is produced by resolver rotor component 19, and auxiliary wick 41 is used to strengthen the magnetic field that is produced by resolver pattern 31.
4 resolver rotor pattern 30A, 30B, 30C, 30D form ring-type respectively in the interval that is divided into 90 degree.After having formed 4 resolver rotor pattern 30A, 30B, 30C, 30D, except that the portion of terminal of each pattern is neighbouring, by firing the insulating barrier that formation is made of polyimides.And, on this insulating barrier, be formed for connecting the connecting line (connecting line of 37A and 37B in the connection layout) of the end of the end 34 of resolver rotor pattern 30A and resolver rotor pattern 30B.This connecting line utilizes ink-jet printer to form.
In addition, the end 34 of resolver rotor pattern 30A is connected in an end 36 of resolver pattern 31 by same connecting line.The other end of resolver rotor pattern 30B is connected in the end of resolver rotor pattern 30C by same connecting line.The other end of resolver rotor pattern 30C is connected in the end of resolver rotor pattern 30D by connecting line (connecting line of 37C and 37D in the connection layout).In addition, the other end 34 of resolver rotor pattern 30D is connected in the other end 35 of resolver pattern 31 by same connecting line.
Afterwards, on connecting line and portion of terminal, by firing the insulating barrier that formation is made of polyimides.Thus, by the variation in magnetic field, the faradic summation that is produced by 4 resolver rotor pattern 30A, 30B, 30C, 30D flow in the resolver pattern 31.
In the present embodiment, connect, but also can use through hole and utilize the back side to connect by on identical face, connecting line being made multi-ply construction.
Then, resolver stator component 23 is described.Resolver stator component 23 is the circular plate shape that is formed with circular centre bore at the center.Diameter is 100～150mm.The material of resolver stator component 23 is PPS resin or LCP liquid crystal polymer, and its thickness is 3～5mm.
The resolver stator component 23 chimeric inboards that are bonded in positioning convex portion 20a, this positioning convex portion 20a forms circle-shaped protuberance at the inner surface of lid housing 20.Thus, resolver stator component 23 is by the axle center location of bearing 21 with respect to motor reel 13.
In the present embodiment, the distance between resolver stator the 2nd pattern 52 on the surface of the resolver rotor pattern 30 on the surface of resolver rotor component 19 and resolver stator component 23 is set to about 1.5mm.
Fig. 4 represents resolver stator the 1st pattern 51.As shown in Figure 4, on a surface of resolver stator component 23, be formed with 4 place's resolver stators the 1st pattern 51A, 51B, 51C, 51D.Near the center of resolver stator component 23, also be formed with resolver pattern 57.
And, be formed with the polyimide insulative layer that thickness is 10 μ m on the surface of resolver stator the 1st pattern 51 and resolver pattern 57.This insulating barrier is also fired after coating polyimide and is formed.And, on the surface of this insulating barrier, being formed with resolver stator shown in Figure 5 the 2nd pattern 52, this resolver stator the 2nd pattern 52 is with respect to resolver stator the 1st pattern 51 overlapping and 90 phase places of spending that stagger.
Resolver stator the 1st pattern 51, resolver pattern 57 and resolver stator the 2nd pattern 52 utilize ink-jet printer to form.As China ink, use the silver paste that in dispersant, disperses silver particles to form.After applying silver paste, fires the thickness with 10～20 μ m.Make the dispersant distillation by firing, fixedly adhere to the silver-colored film that thickness is 2～5 μ m on the surface that changes depressor stator component 23.The width of resolver stator the 1st pattern 51, resolver pattern 57 and resolver stator the 2nd pattern 52 is 0.5mm.
Be formed with thickness on the surface of resolver stator the 2nd pattern 52 and be the insulating barrier that constitutes by polyimides of 10 μ m.This insulating barrier also is to fire to form after coating polyimide.
4 resolver stator the 1st pattern 51A, 51B, 51C, 51D respectively as Fig. 2, illustrated in fig. 3 in the same manner, connect by connecting line.In resolver stator the 1st pattern 51, be formed with pair of input terminals 53.As shown in Figure 6, input terminal 53 is connected in drive circuit 56.Fig. 6 is the circuit block diagram of the control structure of expression resolver.
In addition, 4 resolver stator the 2nd pattern 52A, 52B, 52C, 52D are respectively by connecting with Fig. 2, identical connecting line illustrated in fig. 3.In resolver stator the 2nd pattern 52, be formed with pair of input terminals 53.As shown in Figure 6, input terminal 53 is connected in drive circuit 56.
Then, the control structure is described.As shown in Figure 6, generation as the sin curve (Asin ω t) of the 7.2kHz of the 1st excitation signal, and, be connected in resolver stator the 1st pattern 51 and resolver stator the 2nd pattern 52 as the drive circuit 56 of the cos curve (Acos ω t) of the 7.2kHz of the 2nd excitation signal.Self-driven circuit 56 is supplied with the sin curve to resolver stator the 1st pattern 51, and self-driven circuit 56 is supplied with the cos curve to resolver stator the 2nd pattern 52.The sin curve is identical with the amplitude of cos curve, their phase shifting 90 degree.
In resolver rotor pattern 30, the ABsin (ω t+ θ) that produces as output signal is used as induced current.Output signal is imported in the comparator 54 that is arranged on stator side by resolver pattern 31,57.On the other hand, self-driven circuit 56 is imported sin curve (Asin ω t) in comparator 55.
Survey for fear of the flase drop that caused by noise, the insensitive interval that position calculator 58 will not respond noise is as lagging voltage, and the lagging voltage of regulation is input to the comparator 54 that is used for detecting zero cross point.
Equally, for comparator 55, survey for fear of the flase drop that is caused by noise, position calculator 58 will be input to the comparator 55 that is used for detecting zero cross point to the insensitive interval that noise does not respond as lagging voltage and with this lagging voltage.
The effect of the resolver with above-mentioned structure then, is described.Excitation is as the sin curve (Asin ω t) of the 1st excitation signal S1 in resolver stator the 1st pattern 51, excitation is as the cos curve of the 2nd excitation signal in resolver stator the 2nd pattern 52, thereby, in resolver rotor pattern 30, produce output signal S2, be ABsin (ω t+ θ) as induced current.Output signal S2 is output in the comparator 54 that is arranged on stator side by resolver pattern 31,57.On the other hand, self-driven circuit 56 is imported the sin curve (Asin ω t) as the 1st excitation signal S1 in comparator 55.Position calculator 58 is detected the anglec of rotation of the calculating motor rotor 15 that staggers on zero test point detection opportunity of opportunity and comparator 55 by the zero cross point of comparator 54.
As described above in detail, adopt the motor structure of the band rotation detector (resolver) of present embodiment, because resolver has: be fixedly set in and cover in the housing 20, form resolver stator the 1st pattern 51 of film like and the discoideus resolver stator component 23 of resolver stator the 2nd pattern 52 on the surface, with the end face that is fixedly set in motor rotor 15, form the discoideus resolver rotor component 19 of the resolver rotor pattern 30 of film like on the surface, with the configuration over the ground of on the axis direction of motor reel 13, practising physiognomy of resolver stator the 1st pattern 51 of film like and resolver rotor pattern 30, with the configuration over the ground of on the axis direction of motor reel 13, practising physiognomy of resolver stator the 2nd pattern 52 of film like and resolver rotor pattern 30, therefore, can shorten resolver shared length on the axis direction of motor reel 13.
In addition, owing to utilize ink-jet printer that resolver rotor pattern 30 is formed Thinfilm pattern on the surface of resolver rotor component 19, can accurately Thinfilm pattern be formed the thickness below the 10 μ m, and, can form the Thinfilm pattern of correct width, therefore, can improve the precision of resolver.
And, resolver rotor pattern 30 is fixedly to be attached on the resolver rotor component 19 by being coated in by ink-jet printer in the dispersant to fire after the black liquid that disperses silver particles to form, therefore, Thinfilm pattern can be fixed on the resolver rotor component 19 effectively.
In addition, owing between motor rotor 15 and resolver rotor component 19, have barricade 18, lessly be subjected to the influence that bring in magnetic field that the influence that is brought by the magnetic field that is installed in the permanent magnet 16 in the motor rotor 15 and the existence that is produced by motor stator 12 change, therefore, can detect the anglec of rotation accurately.And,, therefore, can shield the magnetic line of force fully because shield member is the barricade 18 or the copper facing of copper coin.
The 2nd execution mode
Then, describe the 2nd execution mode of the best that the motor of band rotation detector of the present invention structure has been specialized with reference to the accompanying drawings in detail.
In addition,, therefore, identical part is marked the Reference numeral identical with the 1st execution mode and omits explanation, below difference only is described because the most contents of each execution mode of following explanation is identical with the 1st execution mode.
Fig. 7 is the cutaway view that expression is built-in with the motor structure of resolver.As shown in Figure 7, barricade 18 and resolver rotor component 19 are fixed on the end difference 13a of motor reel 13 by separator 61.That is, between the inside diameter by separator 61 being pressed into end difference 13a and barricade 18, the inside diameter of resolver rotor component 19, thereby determine that barricade 18 and resolver rotor component 19 are with respect to the position of motor reel 13 and fixing.
The 3rd execution mode
Then, describe the 3rd execution mode of the best that the motor of band rotation detector of the present invention structure has been specialized with reference to the accompanying drawings in detail.
Fig. 8 is the cutaway view that expression is built-in with the motor structure of resolver.As shown in Figure 8, barricade 62 and resolver rotor component 19 are directly fixed on the end difference 13a of motor reel 13.That is, end difference 13a matches with the inside diameter of barricade 62 and resolver rotor component 19, utilizes bonding agent that barricade 62 and resolver rotor component 19 are fixed in motor reel 13.
In addition, barricade 62 also has to the outstanding annular convex 62a of resolver rotor component 19 directions at its most peripheral end.By having annular convex 62a, can improve shielding properties to resolver rotor component 19.
The 4th execution mode
Then, describe the 4th execution mode of the best that the motor of band rotation detector of the present invention structure has been specialized with reference to the accompanying drawings in detail.
Fig. 9 represents to be built-in with the structure of the motor of resolver by cutaway view.Figure 10 is at the structure of motor, by the part among the oval S1 of the chain-dotted line of amplification view presentation graphs 9.Figure 11 represents the part amplification among the chain-dotted line circle S2 of Figure 10 the characteristic of present embodiment by cutaway view.
In the present embodiment, be with the difference of the structure of the 1st execution mode, omit the 1st execution mode stop part 17 and barricade 18, shorten motor reel 13 end difference 13a, directly fixedly install resolver rotor component 19 these points at an end face of motor rotor 15.In the present embodiment, keep the lid housing 20 of resolver stator component 23 to form by nonmagnetic conductive material.Be integrated cylindrical portion 20b on the housing 20 at lid as shielding part, this cylindrical portion 20b be make cover the position of housing 20 along the periphery of resolver rotor component 19 from the periphery of maintenance resolver stator component 23, be that protuberance 20a plays resolver rotor component 19 and only gives prominence to cylindric.At this, can adopt aluminium as nonmagnetic conductive material.
Thereby, adopt the motor structure of the band rotation detector (resolver) of present embodiment, owing to make cylindrical portion 20b outstanding to resolver rotor component 19 ground from the protuberance 20a of lid housing 20, therefore, shown in arrow among Figure 11, the magnetic field that is produced by motor stator 12 is converted into vortex flow and becomes heat in cylindrical portion 20b.Therefore, the harmful effect that cause resolver stator component 23 and resolver rotor component 19 in the magnetic field that produced by motor stator 12 can be reduced, thereby the anglec of rotation accuracy of detection of resolver can be improved.In addition, because the space 26 between resolver rotor component 19 and the resolver stator component 23 is covered by cylindrical portion 20b, therefore, can prevent that foreign matter from entering into this space 26.As a result, can prevent broken string, short circuits such as resolver stator the 1st pattern 51, resolver stator the 2nd pattern 52 and resolver rotor pattern 30, on this meaning, can improve the reliability of resolver.And the cylindrical portion 20b that can utilize mould will have an above-mentioned functions is integrally formed with lid housing 20, and this function part needn't be set in addition, can not increase the part number of packages and the advantage that raises the cost.
The 5th execution mode
Then, describe the 5th execution mode of the best that the motor of band rotation detector of the present invention structure has been specialized with reference to the accompanying drawings in detail.
Figure 12 represents to be built-in with the structure of the motor of resolver by cutaway view.In the present embodiment, omit the stop part 17 of the 1st execution mode, shorten motor reel 13 end difference 13a aspect, its structure is different with the 1st execution mode.In the present embodiment, be fixed in the right side of motor rotor 15, be fixed with resolver rotor component 19 on this barricade 18 as barricade 18 butts of shield member.As barricade 18, can adopt aluminium as non magnetic conductive material etc.In the outer peripheral edges of this barricade 18, be formed with it along the periphery of resolver rotor component 19 with near the cylindric cylindrical portion 18a that projects to the resolver stator component 23.The front end of this cylindrical portion 18a is vacated with gap with the front end that keeps the protuberance 20a of resolver stator component 23 on lid housing 20 and is faced mutually.
Thereby, adopt the motor structure of present embodiment, owing to make the outer peripheral edges of the barricade 18 that constitutes by non magnetic conductive material project to resolver stator component 23 cylindrical portion 18a is set neighbouringly, therefore, the magnetic field that is produced by motor stator 12 is converted into vortex flow and becomes heat in cylindrical portion 18a.Therefore, the harmful effect that bring resolver stator component 23 and resolver rotor component 19 in magnetic field can be reduced, thereby the anglec of rotation accuracy of detection of resolver can be improved.In addition, because the space 26 between resolver rotor component 19 and the resolver stator component 23 is covered by cylindrical portion 18a, therefore, can prevent that foreign matter from entering into this space 26.As a result, can prevent broken string, short circuits such as resolver stator the 1st pattern 51, resolver stator the 2nd pattern 52 and resolver rotor pattern 30, on this meaning, can improve the reliability of resolver.And it is integrally formed to utilize mould will have the cylindrical portion 18a and a barricade 18 of above-mentioned functions, and this function part needn't be set in addition, can not increase the part number of packages and the advantage that raises the cost.
The 6th execution mode
Then, describe the 6th execution mode of the best that the motor of band rotation detector of the present invention structure has been specialized with reference to the accompanying drawings in detail.
Figure 13 represents to be built-in with the structure of the motor of resolver by cutaway view.In the present embodiment, different with the 4th execution mode, with the lid housing 20 protuberance 20a add longer, from this protuberance 20a to being provided with the columnar shield member 27 that constitutes by non magnetic conductive material the resolver rotor component 19.The base end part of this shield member 27 is fixed on the inboard of protuberance 20a, and its leading section covers the outer peripheral edges of resolver rotor component 19.Can adopt aluminium as nonmagnetic conductive material.
Thereby, adopt the motor structure of present embodiment, be set to the outer peripheral edges of resolver rotor component 19 from the protuberance 20a of lid housing 20 owing to the columnar shield member 27 that constitutes by non magnetic conductive material, therefore, the magnetic field that is produced by motor stator 12 is converted into vortex flow and becomes heat in shield member 27.Therefore, the harmful effect that cause resolver stator component 23 and resolver rotor component 19 in magnetic field can be reduced, thereby the anglec of rotation accuracy of detection of resolver can be improved.In addition, because the space 26 between resolver rotor component 19 and the resolver stator component 23 is covered by columnar shield member 27, therefore, can prevent that foreign matter from entering into this space 26.As a result, can prevent broken string, short circuits such as resolver stator the 1st pattern 51, resolver stator the 2nd pattern 52 and resolver rotor pattern 30, on this meaning, can improve the reliability of resolver.In addition, the material that shield effectiveness can be higher than the shield effectiveness that covers housing 20 is used for shield member 27, thereby compares the shield effectiveness that can improve magnetic field with the 1st execution mode.
The 7th execution mode
Then, describe the 7th execution mode of the best that the motor of band rotation detector of the present invention structure has been specialized with reference to the accompanying drawings in detail.
Figure 14 represents to be built-in with the structure of the motor of resolver by cutaway view.In the present embodiment, different with the 5th execution mode, the front end of the cylindrical portion 18a of barricade 18 is faced mutually with the periphery of the protuberance 20a that is used to keep resolver stator component 23.
Thereby, adopt the motor of present embodiment to construct, can obtain and the equal action effect of the 5th execution mode.In addition, because the front end of cylindrical portion 18a is faced mutually with the periphery of protuberance 20a, therefore, the space 26 between resolver rotor component 19 and the resolver stator component 23 can be covered more closely, can prevent more effectively that foreign matter from entering into this space 26.
The 8th execution mode
With reference to description of drawings the 8th execution mode of the present invention.
Figure 15 is a cutaway view of representing the motor structure of the 1st execution mode simply.
Motor 10 is the brushless motors that comprise shell main body 79, clamshell 71, motor stator 72, motor rotor 73, motor reel 74 and bearing of motor 76a, 76b.
Shell main body 79 and clamshell 71 wait by Birmasil and make, and are equipped with bearing of motor 76b in shell main body 79, are equipped with bearing of motor 76a in clamshell 71, and bearing of motor 76a, 76b supporting motor axle 74 can rotate motor reel 74.
Be fixed with motor stator 72 interior week in shell main body 79.Motor stator 72 has coil, produces magnetic force by energising.
On the other hand, on motor reel 74, be fixed with motor rotor 73 with permanent magnet.Motor stator 72 and motor rotor 73 separately is held predetermined distance, by 72 energisings make motor rotor 73 rotations to motor stator, and generation actuating force and to motor reel 74 transferring power.
End face at motor rotor 73 is set with resolver rotor 75 across the barricade 78 as nonmagnetic material and conductivity.In the present embodiment, as the barricade 78 use copper coins of nonmagnetic material flat board, but also can constitute by brass, aluminium.
Be fixed with resolver stator 77 on clamshell 71, under the state of having assembled shell main body 79 and clamshell 71, resolver rotor 75 separates the configuration of predetermined distance ground with resolver stator 77.Though make the less accuracy of detection that can improve resolver 80 of predetermined distance G, also need on the bases such as change in size of considering dimensional tolerance, causing, to decide predetermined distance G by temperature.
Figure 28 is the block diagram of the position detection control of expression resolver.
Resolver 80 is made of circuit 88 and sensor part 89, and this circuit 88 is made of 2X.Circuit 88 is made of SIN signal generator 81, carrier generator 82, COS signal generator the 83, the 1st modulator the 84, the 2nd modulator 85, wave detector 86 and phase difference detector 87.Sensor part 89 is made of SIN signal magnet exciting coil 91, COS signal magnet exciting coil 92, magnetic test coil 93, rotor-side resolver 94 and stator side resolver 95.
As shown in figure 28, the SIN signal generator 81 of the SIN signal wave of generation 7.2kHz is connected in the 1st modulator 84.The COS signal generator 83 that produces the COS signal wave of 7.2kHz is connected in the 2nd modulator 85.
In addition, the carrier generator 82 of the carrier wave of generation 500kHz is connected in the 1st modulator the 84, the 2nd modulator 85.In addition, SIN signal generator 81 is connected in phase difference detector 87.Wave detector 86 is connected in phase difference detector 87.
The 1st modulator 84 is connected in SIN signal magnet exciting coil 91, the 2 modulators 85 and is connected in COS signal magnet exciting coil 92.
Magnetic test coil 93 is connected in rotor-side resolver 94, and stator side resolver 95 is connected in wave detector 86.
Then, describe the structure of SIN signal magnet exciting coil 91, COS signal magnet exciting coil 92 in detail.
Figure 16 represents the structure of resolver stator 77 with vertical view.Figure 27 represents the structure of resolver stator 77 with schematic cutaway view.Shown in 27, resolver stator 77 is to stack gradually SIN signal magnet exciting coil 91, insulating coating 110, wire jumper 128,129, insulating coating 120, COS signal magnet exciting coil 92, insulation external coating 131 and constitute on the surface is formed with the base plate 102 of base coating 103.Each layer below is described.
Base plate 102 is the resinous annular plates of PPS.Periphery at base plate 102 is formed with the protuberance 102a with splicing ear.
The upper surface that Figure 19 is illustrated in base plate 102 is formed with the state of base coating 103.Base coating 103 is not formed at the upper surface of protuberance 102a.Base coating 103 is used to make the surface smoothing of base plate 102.
Figure 20 represents with the state of ink-jet printer after the upper surface of base coating 103 applies SIN signal magnet exciting coil 91.In SIN signal magnet exciting coil 91,4 groups of SIN signal magnet exciting coil 91A, 91B, 91C, 91D are configured in the position of staggering 90 degree.The number of turn of each coil is 7 circles.On 4 groups of SIN signal magnet exciting coil 91A, 91B, 91C, the 91D, all within it sides have interior all end 104A, 104B, 104C, 104D, have peripheral end 105A, 105B, 105C, 105D at its outer circumferential side.Each coil from interior all ends 104 towards periphery have slightly with gap one by one around and form 7 circles, arrive peripheral end 105.
In addition, the end of SIN signal magnet exciting coil 91A is connected in outside terminal 109.In addition, the end of SIN signal magnet exciting coil 91B is connected in outside terminal 108.
In addition, utilize ink-jet printer to be coated with the transformer 95A of a part that constitutes stator side resolver 95 in interior all sides of SIN signal magnet exciting coil 91.The end of transformer 95A is connected in outside terminal 106.The other end of transformer 95A is connected in transformer end 107.
Figure 21 represents to be coated in the vertical view of the insulating coating 110 on the SIN signal magnet exciting coil 91.On insulating coating 110, be formed with through hole 111A, 111B, 111C, 111D with interior all end 104A, 104B, 104C, the corresponding position of 104D.In addition, be formed with through hole 112A, 112B, 112C, 112D with peripheral end 105A, 105B, the corresponding position of 105C, 105D.
In addition, be formed with through hole 113 at insulating coating 110 with 107 corresponding positions, transformer end.In addition, be formed with notch 110a at insulating coating 110 with outside terminal 106 corresponding positions.Utilize through hole and carry out wiring method see below state bright.
Figure 22 represents with the state of ink-jet printer after the upper surface of insulating coating 110 applies wire jumper 128,129.Wire jumper 128 is wire jumpers of SIN signal magnet exciting coil 91 usefulness, and wire jumper 129 is wire jumpers of COS signal magnet exciting coil 92 usefulness.After describing, the COS signal magnet exciting coil 92 to Figure 24 describes wire jumper 128,129 in detail.
In addition, as shown in figure 22, utilize ink-jet printer to be coated with the transformer 95B of a part that constitutes stator side resolver 95 in interior all sides of wire jumper 128,129.The end of transformer 95B is connected in outside terminal 126.The other end of transformer 95B is connected in transformer end 107 by through hole 113.
Figure 23 represents to be coated in the vertical view of the insulating coating 120 on the wire jumper 128,129.In addition, Figure 24 represents with the state of ink-jet printer after the upper surface of insulating coating 120 applies COS signal magnet exciting coil 92.In COS signal magnet exciting coil 92,4 groups of COS signal magnet exciting coil 92A, 92B, 92C, 92D are configured in the position of staggering 90 degree each other.The number of turn of each coil is 6 circles.COS signal magnet exciting coil 92A, 92B, 92C, 92D form with respect to SIN signal magnet exciting coil 91A, 91B, 91C, 91D with staggering 45 degree phase places each other.
4 groups of COS signal magnet exciting coil 92A, 92B, 92C, all within it sides of 92D have interior all end 115A, 115B, 115C, 115D, have peripheral end 116A, 116B, 116C, 116D at its outer circumferential side.Each coil from interior all ends 115 towards periphery have slightly with gap one by one around and form 6 circles, arrive peripheral end 116.
In addition, the end of COS signal magnet exciting coil 92A is connected in outside terminal 118.In addition, the end of COS signal magnet exciting coil 92D is connected in outside terminal 117.
As shown in figure 23, on insulating coating 120, be formed with through hole 121A, 121B, 121C, 121D in interior all end 115A, 115B, 115C, the corresponding position of 115D with COS signal magnet exciting coil 92A, 92B, 92C, 92D.In addition, be formed with through hole 122A, 122B, 122C, 122D with peripheral end 116A, 116B, the corresponding position of 116C, 116D.
In addition, be formed with notch 120a at insulating coating 120 with outside terminal 106,126 corresponding positions.
The method of attachment of wire jumper 128 then, is described.As Figure 20～shown in Figure 22, outside terminal 108 is connected in the end of SIN signal magnet exciting coil 91B, then all end 104B around counterclockwise forming 7 circle coils and in being connected in.Interior all end 104B are connected in the end of wire jumper 128B by through hole 111B.The other end of wire jumper 128B is connected in peripheral end 105B by through hole 112B.
As Figure 20～shown in Figure 22, peripheral end 105B is connected in the peripheral end 105C of SIN signal magnet exciting coil 91C.Peripheral end 105C is connected in the end of wire jumper 128C by through hole 112C.All end 104C in the other end of wire jumper 128C is connected in by through hole 111C.Form 7 circle coils and be connected in the end of SIN signal magnet exciting coil 91D around clockwise direction from interior all end 104C, more all end 104D around counterclockwise forming 7 circle coils and in being connected in.
Interior all end 104D are connected in the end of wire jumper 128D by through hole 111D.The other end of wire jumper 128D is connected in peripheral end 105D by through hole 112D.
Peripheral end 105D is connected in the peripheral end 105A of SIN signal magnet exciting coil 91A.Peripheral end 105A is connected in the end of wire jumper 128A by through hole 112A.All end 104A in the other end of wire jumper 128A is connected in by through hole 111A.Form 7 circle coils and be connected in outside terminal 109 around clockwise direction from interior all end 104A.
The method of attachment of wire jumper 129 then, is described.As shown in figure 24, outside terminal 118 is connected in the end of COS signal magnet exciting coil 92A, then all end 115A around counterclockwise forming 7 circle coils and in being connected in.As Figure 22 and shown in Figure 23, interior all end 115A are connected in the end of wire jumper 129A by through hole 121A.The other end of wire jumper 129A is connected in peripheral end 116A by through hole 122A.
As shown in figure 24, peripheral end 116A is connected in the peripheral end 116B of COS signal magnet exciting coil 92B.Peripheral end 116B is connected in the end of wire jumper 129B by through hole 122B.All end 115B in the other end of wire jumper 129B is connected in by through hole 121B.Form 7 circle coils and be connected in the end of COS signal magnet exciting coil 92C around clockwise direction from interior all end 115B, more all end 115C around counterclockwise forming 7 circle coils and in being connected in.
Interior all end 115C are connected in the end of wire jumper 129C by through hole 121C.The other end of wire jumper 129C is connected in peripheral end 116C by through hole 122C.
Peripheral end 116C is connected in the peripheral end 116D of COS signal magnet exciting coil 92D.Peripheral end 116D is connected in the end of wire jumper 129D by through hole 122D.All end 115D in the other end of wire jumper 129D is connected in by through hole 121D.Form 7 circle coils from interior all end 115D around clockwise direction, be connected in outside terminal 117 around the periphery of COS signal magnet exciting coil 92A.
The method of attachment of resolver 95 then, is described.
As Figure 20, shown in Figure 21, be that an end forms circle-shaped resolver 95A with outside terminal 106, its other end 107 is connected in the end of the resolver 95B of Figure 22 by through hole 113.The other end of resolver 95B is connected in outside terminal 126.
Then, as shown in figure 25, make outside terminal and be connected in outer lines at portion of terminal coated with conductive bonding agent.Figure 17 and Figure 18 represent the coated with conductive bonding agent and form the state of outside terminal 106,126,108,109,117,118.
Figure 17 represents the joint construction of outside terminal 106,126 and resolver 95A, 95B.Wherein, (b) being A portion enlarged drawing among Figure 16, (a) is the cutaway view of (b).
Figure 18 represents the joint construction of outside terminal 117.Wherein, (a) being B portion enlarged drawing among Figure 16, (b) is the cutaway view of (a).
Then, as shown in figure 26, expression comprises that protuberance 102a forms the state of diaphragm 131 to whole seal coat.
Then, the resolver rotor 75 that is formed with magnetic test coil 93 is described.Figure 29 represents the structure of resolver rotor 75 with exploded perspective view.(e) base plate 161 of expression resolver rotor 75.(d) expression is formed on the 1st coil layer 162 on the surface of base plate 161.(c) expression is used to make the interlayer insulating film 163 of the 1st coil layer 162 and 164 insulation of the 2nd coil layer.(b) expression is formed on the 2nd coil layer 164 on the interlayer insulating film 163.(a) expression by insulating resin constitute, as the external coating (overcoat) 165 of diaphragm.
Shown in (e), base plate 161 is to have the discoid of circular port at the center, fills resin such as PPS and hardening of resin is made in non magnetic conductive metal system such as aluminium, brass and surface are formed with the recess of plate 161a of recess.
The 1st coil layer 162 comprises 4 magnetic test coil 162a, 162b, 162c, 162d.The 2nd coil layer 164 also comprises 4 magnetic test coil 164a, 164b, 164c, 164d.The end of magnetic test coil 162a, 162b, 162c, 162d is connected in an end of resolver 166.The other end of magnetic test coil 162a, 162b, 162c, 162d is connected in 4 magnetic test coil 164a, 164b of the 2nd coil layer 164, the end of 164c, 164d by through hole 163a.The other end of magnetic test coil 164a, 164b, 164c, 164d is connected in an end of resolver 167.The other end of resolver 166 is connected by the other end of through hole with resolver 167.
Thus, when producing induced current at the magnetic flux of accepting to be produced by magnet exciting coil and by magnetic test coil 162,164, electric current flows into resolver 166,167.
In the resolver 95 of resolver stator side, produce induced current by the magnetic flux that produces by this induced current.By resolving this induced current, can calculate the position of rotation of resolver rotor.
Adopt present embodiment, because resolver 166 is formed at the 1st coil layer 162, resolver 167 is formed at the 2nd coil layer 164, can reduce the occupied area of resolver in 1 coil layer, therefore, can reduce the overall dimension of resolver.
The effect of the resolver structure of present embodiment then, is described.Figure 30 is illustrated in the magnetic flux that is produced by motor stator in the hybrid vehicle, and what promptly represent for resolver is the intensity of disturbing magnetic flux.The longitudinal axis is magnetic flux (mT of unit), and transverse axis is represented condition.Under stable state (100km/h), be about 7mT.Under the middle acceleration mode that accelerates to 100km/h from 60km/h, be about 24mT.Accelerating to from 0km/h under the zero starting acceleration mode of 50km/h, be about 32mT/h.
Figure 31 is illustrated in as disturbing magnetic flux to give the detection angles variable quantity of the resolver under the situation of 39mT.The longitudinal axis represents that detection angles changes, and transverse axis is represented electrical degree.H is the data of resolver of the present invention, and J represents the data of resolver in the past.In resolver structure in the past, detection angles all takes place in all electrical degrees change (error).In contrast to this, adopt resolver structure of the present invention that detection angles does not then all take place in nearly all electrical degree and change (error).
Figure 32 is illustrated in and changes the suffered influence of resolver when disturbing magnetic flux.The longitudinal axis is that detection angles changes (error), and transverse axis represents to disturb magnetic flux (mT).H is the data of resolver of the present invention, and J represents the data of resolver in the past.In resolver in the past, when disturbing magnetic flux to increase, detection angles changes (error) and also increases with being directly proportional.Adopt resolver of the present invention, even then disturb magnetic flux to increase, detection angles changes (error) and also increases hardly.
The effect of the resolver with above-mentioned structure then, is described.The excitation conduct is by the sin curve of the 1st excitation signal S1 after the carrier wave amplitude modulation of 500kHz (Asin ω t) in the SIN of resolver stator 77 signal magnet exciting coil 91.In addition, in COS signal magnet exciting coil 92, encourage conduct by the cos curve of the 2nd excitation signal after the carrier wave amplitude modulation of 500kHz, thereby, output signal ABsin (ω t+ θ) in resolver rotor pattern 94, produced as induced current.Output signal by resolver pattern 94,95 via the wave detector 86 that is arranged on stator side, be output in the phase detectors 87.On the other hand, self-driven circuit 81 is imported the sin curve (Asin ω t) as the 1st excitation signal in phase detectors 87.Stagger the anglec of rotation of phase detectors 87 calculating motor rotors 73 by what the zero cross point of phase detectors 87 detected opportunity.
As described above in detail, adopt the resolver structure of present embodiment, the motor of this band rotation detector structure comprises and is set with motor stator 72 and bearing 76a, the housing 71 of 76b, 79, with have rotation and freely be supported on bearing 76a, the rotating shaft 74 of the motor rotor 73 of 76b, in order to detect the anglec of rotation of motor rotor 73, the resolver stator 77 of resolver is attached to housing 71, resolver rotor 75 is attached to motor rotor 73, it is characterized in that, resolver rotor 75 is constituted and is arranged on the end face of motor rotor 73 by hollow coil, resolver stator 77 is made of hollow coil, therefore, by removing auxiliary wick, the situation that interference magnetic flux that motor stator 72 produced exerts an influence to resolver stator 77 by auxiliary wick can not appear, can reduce the noise that resolver stator 77 is subjected to from motor stator 72, can not reduce the angle accuracy of detection of resolver.At this, the reason that can remove auxiliary wick is, because with the high frequency excitation of 500kHz, therefore, even small signal also can detect fully.
In addition, even when resolver is subjected to having the influencing of disturbing magnetic field of high magnetic flux density, owing to there is not iron core, therefore, the iron core magnetic saturation can not occur, resolver can normally be brought into play function all the time.
In addition,, the number of turn of resolver stator 77 can be reduced to several circles (being 7 circles in the present embodiment), therefore, not be vulnerable to the following noise effect of 100kHz owing to adopt high frequency.In the present embodiment, constitute SIN signal magnet exciting coil 91 and COS signal magnet exciting coil 92 with 7 circles, but also can combine and constitute with rotating speed, the number of magnetic poles of motor with 4～7 circles.
In addition, because the less The noise that is subjected to from motor of resolver of present embodiment, therefore, the resolver stator 77 of film like can be practised physiognomy on the axis direction of rotating shaft with resolver rotor 75 and dispose over the ground, resolver shared length on the axis direction of rotating shaft can be shortened, thereby motor miniaturization can be made.
Present embodiment is a feature with the barricade 78 that has between the end face of resolver rotor 75 and motor rotor 73 as the flat board of non magnetic and conductivity also, the magnetic flux that is produced by motor stator 72 produces vortex flow and is converted into heat on the surface of base plate 102 or barricade 78, therefore, can reduce the magnetic flux that arrives resolver stator 77, can reduce the noise that resolver stator 77 is subjected to from motor stator 72, can not reduce the angle accuracy of detection of resolver.
Present embodiment also forms feature with hollow coil by conductive ink, therefore, Thinfilm pattern can be made the thickness below the 10 μ m and forms accurately, and, owing to can form the Thinfilm pattern of correct width, therefore, can improve the precision of resolver.
And, black liquid by utilizing ink-jet printer on the resolver rotor component, to be coated in to have disperseed silver particles in the dispersant, fire and make Thinfilm pattern fixedly be attached to the resolver rotor component then, therefore, Thinfilm pattern can be fixed on the resolver rotor component reliably.
The feature of present embodiment also is, hollow coil has SIN signal magnet exciting coil 91, insulating coating 110 as the 1st insulating barrier, be formed with wire jumper 128,129 layer, insulating coating 120 as the 2nd insulating barrier, the structure that COS signal magnet exciting coil 92 is stacked, above-mentioned each layer is formed with through hole respectively, the conductive ink that is in the layer of each layer upside is passed through through hole 111,112,121,122 be in downside the layer conductive ink be connected, therefore, only by forming each layer and utilizing ink-jet to form hollow coil, just can make resolver stator 77 efficiently, therefore, can reduce manufacturing cost.
The feature of present embodiment also is, as the excitation signal of resolver stator, use the signal of 300kHz～500kHz or the signal of 1.8MHz～2.7MHz, therefore, in hybrid vehicle, less AM radio and the FM radio given brings radio noise.Since use in the zone of radio more than 500kHz, therefore, so long as the following excitation signal of 500kHz just seldom brings noise to radio.Under the condition of 500kHz, the S/N of resolver of the present invention is enough bigger than (signal to noise ratio).Under the condition of 300kHz, though S/N is than about 1/2 of the S/N ratio that is reduced to 500kHz, but still in usage range.
In addition, owing to use the above excitation signal of 300kHz, can utilize high pass filter easily to filter the maximum also electric moter noise about 10kHz just, therefore, can improve the angle accuracy of detection of resolver.In addition, make resolver with high-frequency coupling owing to the number of turn is reduced to, therefore, the following noise signal of 100kHz becomes and is difficult to coupling.
The present invention can also carry out various application except that the respective embodiments described above.For example, in the respective embodiments described above, barricade 18 made of copper is used as shield member, but also can uses brazen barricade.In addition, also can use and have certain thickness copper facing or aluminium.
In addition, in above-mentioned the 1st execution mode, utilize resolver rotor pattern 30 and resolver pattern 31 and resolver stator 1st pattern 51, resolver pattern 57 and resolver stator 2nd pattern 52 of ink-jet printer (ink-jet method) formation, but also can utilize vapour deposition method, sputtering method, galvanoplastic or etching method to form Thinfilm pattern as Thinfilm pattern.
In addition, in above-mentioned the 4th execution mode, form by non magnetic conductive materials such as aluminium and to cover housing 20 and cylindrical portion 20b, but also can form this lid housing 20 and cylindrical portion 20b by magnetics such as iron.
In addition, in the above-mentioned the 5th and the 7th execution mode, form barricade 18 and cylindrical portion 18a, but also can form this barricade 18 and cylindrical portion 18a by magnetics such as iron by non magnetic conductive materials such as aluminium.
In addition, in above-mentioned execution mode 6, form shield member 27, but also can form shield member by magnetics such as iron by non magnetic conductive materials such as aluminium.
In addition, the present invention is not limited to above-mentioned execution mode, can implement as follows in the scope that does not break away from inventive concept.
Industrial applicibility
The present invention can be used in the motor such as hybrid vehicle, electric automobile etc.

Claims (20)

1. the motor structure with rotation detector is characterized in that,
The motor of this band rotation detector structure comprises housing, be arranged at the stator of above-mentioned housing, be arranged at above-mentioned housing bearing, be supported on above-mentioned housing and the rotating shaft that can rotate freely with respect to above-mentioned housing, the rotor that can be provided with rotatably with above-mentioned rotating shaft one and be used to detect the resolver of the anglec of rotation of above-mentioned rotor by above-mentioned bearing
Above-mentioned resolver comprises and kept by above-mentioned housing and be formed with the discoideus resolver stator component of film like coil on the surface and be arranged at the end face of above-mentioned rotor and be formed with the discoideus resolver rotor component of film like coil on the surface.
2. the motor structure of band rotation detector according to claim 1 is characterized in that,
The above-mentioned film like coil that is formed on the above-mentioned resolver rotor component utilizes ink-jet printer to form as Thinfilm pattern on the surface of above-mentioned resolver rotor component.
3. the motor structure of band rotation detector according to claim 2 is characterized in that,
Utilize above-mentioned ink-jet printer will in dispersant, disperse the black liquid of silver particles to be coated on the above-mentioned resolver rotor component, fire then, thereby above-mentioned Thinfilm pattern fixedly is attached on the above-mentioned resolver rotor component.
4. according to the motor structure of each described band rotation detector in the claim 1～3, it is characterized in that,
Between above-mentioned rotor and above-mentioned resolver rotor component, be provided with shield member.
5. the motor structure of band rotation detector according to claim 4 is characterized in that,
Above-mentioned shield member is copper coin or copper facing.
6. according to the motor structure of each described band rotation detector in the claim 1～5, it is characterized in that,
Above-mentioned resolver stator component and above-mentioned bearing are located with respect to above-mentioned housing.
7. according to the motor structure of each described band rotation detector in the claim 1～6, it is characterized in that,
A part that makes the above-mentioned housing that above-mentioned resolver stator component periphery is kept projects to above-mentioned resolver rotor component and forms shielding part with cylindrical shape along the periphery of above-mentioned resolver rotor component.
8. the motor structure of band rotation detector according to claim 7 is characterized in that,
Above-mentioned housing and above-mentioned shielding part are formed by nonmagnetic conductive material.
9. the motor structure of band rotation detector according to claim 7 is characterized in that,
Above-mentioned housing and above-mentioned shielding part are formed by magnetic.
10. according to the motor structure of each described band rotation detector in the claim 1～6, it is characterized in that,
To above-mentioned resolver rotor component, be provided with columnar shield member in a part from above-mentioned housing that above-mentioned resolver stator component periphery is kept.
11. the motor of band rotation detector according to claim 10 structure is characterized in that,
Above-mentioned shield member is formed by nonmagnetic conductive material.
12. the motor of band rotation detector according to claim 10 structure is characterized in that,
Above-mentioned shield member is formed by magnetic.
13. the motor of band rotation detector according to claim 4 structure is characterized in that,
The outer peripheral edges that are arranged on the above-mentioned shield member between above-mentioned rotor and the above-mentioned resolver rotor component are projected near the above-mentioned resolver stator component with cylindric along the periphery of above-mentioned resolver rotor component.
14. the motor of band rotation detector according to claim 13 structure is characterized in that,
Above-mentioned shield member is formed by nonmagnetic conductive material.
15. the motor of band rotation detector according to claim 13 structure is characterized in that,
Above-mentioned shield member is formed by magnetic.
16. the motor structure with rotation detector is characterized in that,
The motor structure of this band rotation detector comprises the housing that is set with motor stator and bearing and has the rotating shaft that rotation freely is supported on the motor rotor of this bearing, in order to detect the anglec of rotation of above-mentioned motor rotor, the resolver stator of resolver is attached to above-mentioned housing, the resolver rotor is attached to above-mentioned motor rotor
Above-mentioned resolver rotor is constituted and is arranged on the end face of above-mentioned motor rotor by hollow coil;
Above-mentioned resolver stator is made of hollow coil.
17. the motor of band rotation detector according to claim 16 structure is characterized in that,
Between the end face of above-mentioned resolver rotor and above-mentioned motor rotor, has the nonmagnetic material flat board.
18. the motor structure according to claim 16 or 17 described band rotation detectors is characterized in that,
Above-mentioned hollow coil is formed by conductive ink.
19. the motor of band rotation detector according to claim 18 structure is characterized in that,
Above-mentioned hollow coil has SIN coil layer, the 1st insulating barrier, wire jumper layer, the 2nd insulating barrier, the stacked structure of COS coil layer, and above-mentioned each layer is formed with through hole respectively;
Be in above-mentioned each layer upside the layer above-mentioned conductive ink by above-mentioned through hole be in downside layer above-mentioned conductive ink be connected.
20. the motor structure according to each described band rotation detector in the claim 16～19 is characterized in that,
As the excitation signal of above-mentioned resolver stator, use the signal of 300kHz～500kHz or the signal of 1.8MHz～2.7MHz.
CN 200910211417 2008-11-06 2009-11-06 Motor structure with rotation detector Expired - Fee Related CN101741179B (en)

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JP2009-100231 2009-04-16
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