CN203118749U - Rotary transformer and rolling bearing device with rotary transformer - Google Patents
Rotary transformer and rolling bearing device with rotary transformer Download PDFInfo
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- CN203118749U CN203118749U CN 201220459843 CN201220459843U CN203118749U CN 203118749 U CN203118749 U CN 203118749U CN 201220459843 CN201220459843 CN 201220459843 CN 201220459843 U CN201220459843 U CN 201220459843U CN 203118749 U CN203118749 U CN 203118749U
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Abstract
The utility model provides a rotary transformer and a rolling bearing device with the rotary transformer, which cannot cause a large size and the like of the rotary transformer or the increasing of calculated load of a computer and can reduce an error (angular error) of a rotary angle, thereby improving the detection precision. The rotary transformer (10) is provided with an annular rotary transformer stator (12) and a rotary transformer rotor (13), wherein the annular rotary transformer stator (12) is provided with a coil used for excitation and output; the rotary transformer rotor (13) is installed on a rotary shaft (11) and arranged on the radial inner side of the rotary transformer stator (12); the rotary transformer rotor (13) is provided with an outer circumferential surface which circumferentially changes with a radial gap of an inner circumferential surface of the rotary transformer stator (12); and when a minimum gap between the inner circumferential surface of the rotary transformer stator (12) and the outer circumferential surface of the rotary transformer rotor (13) is set as delta 1 and a maximum gap is set as delta 2, the ratio of the delta 2 to the delta 1 is set to be larger than or equal to 6.0 and less than or equal to 9.0.
Description
Technical field
The utility model relates to the resolver that uses for the anglec of rotation (position of rotation) that detects the rotating shaft that is arranged at motor etc. and the rolling bearing system of band resolver.
Background technology
Resolver is a kind of of the angle detection device that uses for the anglec of rotation that detects rotating shaft (position of rotation), possesses resolver stator and resolver rotor (for example, with reference to patent documentation 1,2).The resolver stator forms circular, and within it side face with being provided with a plurality of tooth portion along circumferentially spaced mode at interval, this a plurality of tooth portion be wound with excitation with and export and use coil.In addition, the resolver rotor having separated the state configuration in gap (space), and is installed on rotating shaft in mode that can the one rotation at the radially inner side of resolver stator.Resolver stator and resolver gap between rotor changed along circumferential cycle with regulation, thereby resolver constitutes: the anglec of rotation that changes to detect rotating shaft by the output of accompanying with the variation in this gap with the output of coil.
Patent documentation 1: TOHKEMY 2007-336714 communique
Patent documentation 2: TOHKEMY 2009-8536 communique
For the resolver of record in the patent documentation 1, resolver rotor and resolver stator form independently parts respectively, and, rotating shaft supporting is also formed and resolver stator, resolver rotor parts independently for the rolling bearing that can rotate freely, and these parts are installed respectively independently with respect to housing and the rotating shaft of motor etc.Therefore, be difficult to improve the assembly precision of the axes alignment etc. of each parts that constitutes resolver and rolling bearing.If produce deviation aspect the assembly precision of each parts, then the error of the detected anglec of rotation (angular error) increases, thereby causes the reduction of accuracy of detection.
In order to dwindle above-mentioned angular error, in the past, the method that the number of turn of having carried out making the number increase of coil or make each coil increases.But, according to these class methods, can cause the maximization of resolver, high weightization, thereby become the manufacturing cost cause of increased.
In addition, the resolver that patent documentation 2 is put down in writing utilizes the corrected parameter of obtaining in real time to revise the processing that detects data in order to dwindle angular error.Though can dwindle angular error to a certain extent by carrying out such correcting process, have the shortcoming of the calculated load increase of computer.
The utility model content
The purpose of this utility model is to provide the rolling bearing system of resolver and band resolver, can not cause the increase ground of the calculated load of the maximization etc. of resolver or computer to reduce the error (angular error) of the anglec of rotation, thereby improve accuracy of detection.
The utility model is to possess the resolver stator of ring-type and the resolver of resolver rotor, the resolver stator is provided with the coil that excitation is used and exported usefulness, the resolver rotor is installed on rotating shaft and is disposed at the radially inner side of above-mentioned resolver stator, and has an outer peripheral face, gap radially between the inner peripheral surface of this outer peripheral face and above-mentioned resolver stator is along circumferentially changing, this resolver is characterised in that, be made as δ 1 in the gap with the minimum between the outer peripheral face of the inner peripheral surface of above-mentioned resolver stator and above-mentioned resolver rotor, and when the gap of maximum is made as δ 2, δ 2 is set at 6.0≤δ, 2/ δ 1≤9.0 with respect to the ratio (δ 2/ δ 1) of δ 1.
Inventor of the present utility model recognizes, it is effective for the angular error of dwindling resolver the maximal clearance δ 2 of the outer peripheral face of the inner peripheral surface of resolver stator and resolver rotor being taken in respect to the ratio of minimum clearance δ 1.That is, found with respect to the ratio of minimum clearance δ 1 amplitude of output signal to be increased by increasing maximal clearance δ 2, can dwindle angular error.In the past, maximal clearance δ 2 was about δ 2/ δ 1=4.0 with respect to the ratio of minimum clearance δ 1, but became 6.0≤δ, 2/ δ 1≤9.0 in the utility model, this ratio that increased compared with the past.Thus, can not cause the increase ground of the maximization of resolver, high weightization and calculated load to reduce angular error efficiently.
Preferably the gap delta 1 with above-mentioned minimum is set at 0.2mm≤δ 1≤0.8mm.
In the past, the minimum clearance δ 1 between the outer peripheral face of the inner peripheral surface of resolver stator and resolver rotor was normally more than the 1mm, but became δ 1=0.2mm ~ 0.8mm in the utility model.Thereby by dwindling minimum clearance δ 1 further output signal is further increased like this.In addition, by dwindling minimum clearance δ 1 further, thereby maximal clearance δ 2 is increased with respect to the ratio of minimum clearance δ 1.In other words, if minimum clearance δ 1 is big, then must also increase maximal clearance δ 2 in order to keep above-mentioned ratio, but the minimum outer diameter that need dwindle the resolver rotor in order to increase this maximal clearance δ 2.But the minimum outer diameter of resolver rotor can't narrow down to littler than the outside dimension of rotating shaft, thereby is subjected to the restriction of this outside dimension.Therefore, by as the utility model, setting minimum clearance δ 1 as described above, can not be subjected to the outside dimension of rotating shaft restrictedly suitably to set maximal clearance δ 2 with respect to the ratio of minimum clearance δ 1.
In addition, if there is dislocation in the axle center of resolver stator and resolver rotor, it is very difficult then as described above minimum clearance δ 1 to be set at small size.
Therefore, in the utility model, provide the rolling bearing system of following band resolver: this device has: above-mentioned resolver; Rolling bearing, it has inner ring, outer ring and is disposed at rolling element between inner ring and the outer ring in the mode that can roll, this rolling bearing with the rotating shaft supporting for rotating freely; And case member, the outer ring of resolver stator and rolling bearing is installed on this case member, and above-mentioned resolver stator and above-mentioned rolling bearing are by above-mentioned case member and assembled as a unit.
Like this, if resolver stator and rolling bearing are assembled as a unit, then can be rotated the axes alignment of resolver stator and rolling bearing in the assembling stage accurately, thereby also can improve the assembly precision of the rotating shaft that is assembled in rolling bearing, the resolver rotor that is installed on this rotating shaft and resolver stator.
In addition, by resolver stator and rolling bearing are assembled as a unit, also can be rotated the operation of resolver stator and rolling bearing easily, with respect to the assembling operation of housing and rotating shaft.
Preferred above-mentioned case member possesses: the fitting portion of barrel shape, and it has inner peripheral surface, and the outer peripheral face of above-mentioned resolver stator is embedded in this inner peripheral surface; And outer ring installation portion, it forms the barrel shape different with above-mentioned fitting portion diameter, and the outer peripheral face of the outer ring of above-mentioned rolling bearing is chimeric with respect to the inner peripheral surface of this outer ring installation portion, is provided with along plectane portion radially between above-mentioned outer ring installation portion and above-mentioned fitting portion.
Like this, by between fitting portion and outer ring installation portion, plectane portion being set, for example, can feed through to fitting portion hardly because making distortion that the outer ring is embedded in the outer ring installation portion that the outer ring installation portion produces etc., thereby can suitably carry out the chimeric of this fitting portion and resolver stator.Its result can prevent that the gap of outer peripheral face of the inner peripheral surface of resolver stator and resolver rotor is not normal.
Preferably the plastic working by sheet material forms above-mentioned outer ring installation portion, above-mentioned fitting portion and above-mentioned plectane portion.
Can easily make case member thus.
Rolling bearing system according to resolver of the present utility model and band resolver, can not cause the increase ground of the calculated load of the maximization of resolver, high weightization, computer to reduce the error (angular error) of the anglec of rotation, thereby improve accuracy of detection.
Description of drawings
Fig. 1 is the side view cutaway drawing of the related resolver of expression execution mode of the present utility model.
Fig. 2 is the front view of the part of expression resolver.
Fig. 3 is the end view of the part of expression resolver.
Fig. 4 is the stereogram of case member.
Fig. 5 is the front view of expression resolver stator and resolver rotor.
Fig. 6 is the front view that the part of resolver stator is amplified expression.
Fig. 7 schematically shows the chart that the output waveform (SIN ripple) of coil is used in output.
Fig. 8 schematically shows the chart that the output waveform (COS ripple) of coil is used in output.
Fig. 9 is the figure of the angular error of expression embodiment and conventional example.
The explanation of Reference numeral
10 ... resolver; 11 ... rotating shaft; 12 ... the resolver stator; 13 ... the resolver rotor; 14 ... rolling bearing; 15 ... case member; 19 ... inner ring; 21 ... the outer ring; 22 ... rolling element; 24 ... the outer ring installation portion; 25 ... fitting portion; 27 ... plectane portion; δ 1 ... minimum clearance; δ 2 ... the maximal clearance.
Embodiment
With reference to the accompanying drawings execution mode of the present utility model is described.
Fig. 1 is the side view cutaway drawing of the related resolver of expression execution mode of the present utility model.
The resolver 10 of present embodiment for example is the device that uses for the anglec of rotation (position of rotation) of the rotating shaft 11 that detects the genemotor of using in the hybrid vehicle, and it possesses resolver stator 12 and resolver rotor 13.And, resolver 10 and the rolling bearing 14 of present embodiment together constitutes the rolling bearing system of band resolver, this rolling bearing 14 is used for rotating shaft 11 is supported to rotating freely, thereby resolver stator 12 and rolling bearing 14 are assembled into one via case member 15 as a unit.
As shown in Figure 1, rolling bearing 14 possesses: inner ring 19, and it has inner race track 18; Outer ring 21, it is disposed at the radial outside of above-mentioned inner ring 19 with being concentric shape, and has outer race track 20; And a plurality of rolling elements 22, they are disposed between inner race track 18 and the outer race track 20 in the mode that can roll.The rolling bearing 14 of present embodiment forms the ball bearing that has possessed as the ball of rolling element 22.In addition, case member 15 is fixed in the outer ring 21 of rolling bearing 14, and inner ring 19 is fixed in rotating shaft 11.
Fig. 2 is the front view of the part (part except resolver rotor 13) of expression resolver 10, and Fig. 3 is the end view of the part (the same) of expression resolver 10.In addition, Fig. 4 is the stereogram of case member 15.
As Fig. 1 ~ shown in Figure 4, case member 15 possesses: outer ring installation portion 24, and install its outer ring 21 for rolling bearing 14; Fitting portion 25, it is installed for resolver stator 12.Outer ring installation portion 24 forms drum, and the outer peripheral face of outer ring 21 is the chimeric inner peripheral surface that is fixed in this outer ring installation portion 24 by being pressed into.In addition, fitting portion 25 also forms drum, and the outer peripheral face of resolver stator 12 is the chimeric inner peripheral surface that is fixed in this fitting portion 25 by being pressed into.
Outer ring installation portion 24 forms littler than fitting portion 25 diameters, is formed with the plectane portion 27 along radial arrangement between outer ring installation portion 24 and fitting portion 25.In addition, be formed with the inward flange portion 28 to the radially inner side flexing in an axial end (about ends (right part of the outer ring installation portion 24 among Fig. 1) axial and fitting portion 25 opposite sides) of outer ring installation portion 24.
Axial the other end (about ends (left part of the fitting portion 25 among Fig. 1) axial and outer ring installation portion 24 opposite sides) at fitting portion 25 is formed with the outward flange portion 29 to the radial outside flexing.And outer ring installation portion 24, fitting portion 25, plectane portion 27, inward flange portion 28 and outward flange portion 29 are integrally formed by the sheet material enforcement punch process plastic workings such as (stretch process) that metal is made.
Inward flange portion 28 brings into play function as the restriction portion that the axial position of the outer ring 21 that is embedded in outer ring installation portion 24 is limited.In addition, outward flange portion 29 except the connector 51(of portion described later with reference to Fig. 2) the position roughly be formed at the complete cycle of fitting portion 25, and have the function as the rib of fitting portion 25 being strengthened from outer circumferential side.By this outward flange portion 29, can guarantee to be embedded in fitting portion 25 the resolver stator be pressed into load.In addition, by being formed with outward flange portion 29, can improve the dimensional accuracy of the case member 15 of the moulding by punch process, especially the dimensional accuracy of fitting portion 25.In addition, outer ring installation portion 24, fitting portion 25, plectane portion 27, inward flange portion 28 and the outward flange portion 29 that constitutes case member 15 can easily make case member 15 thus by punch process and integrally formed.
And flange part 29 is formed with the flange part 31 that a plurality of (being three in illustrated example) further extend to radial outside along the constant compartment of terrain of circumferentially spaced outside.Be formed with circular-arc slotted hole 32 centered by the O of axle center at this flange part 31.
As shown in Figure 1, case member 15 is installed on the housing 35 of motor generator (motor generator) etc. via retainer ring 34.As shown in Figure 2, retainer ring 34 has a plurality of (being three in illustrated example) boss 36 along the constant compartment of terrain of circumferentially spaced, and is formed with internal thread hole 37 at this boss 36.And, coincide with outward flange portion 29 and the flange part 31 of case member 15 by making retainer ring 34, and the bolt 38 that inserts housing 35 and slotted hole 32 is screwed togather with internal thread hole 37, thereby case member 15 is installed on housing 35.In addition, can in the scope of slotted hole 32, adjust (zero-bit adjustment) in the circumferential position to case member 15.
As shown in Figure 1, formed installation portion 16 at rotating shaft 11.The part of the outer peripheral face by making rotating shaft 11 constitutes installation portion 16 to radial outside is outstanding.Be formed with in an axial end of this installation portion 16 for inner ring 19 and be pressed into chimeric inner ring installation portion 16a, at the axial middle part of installation portion 16 resolver rotor 13 is arranged fixedly.In addition, this installation portion 16 also can be used as and rotating shaft 11 parts and constituting independently.In this case, also can installation portion 16 be formed drum by metal material, synthetic resin material etc., thereby and with its outer peripheral face that is embedded in rotating shaft 11 be set to can one rotation.
Fig. 5 is the front view of expression resolver stator 12 and resolver rotor 13, and Fig. 6 is the front view that the part of resolver stator 12 is amplified expression.Resolver stator 12 forms ring-type, and possesses: stator core 42, coil 43, insulator 44.Stator core 42 is formed by the magnetic material of silicon steel plate of individual layer or multilayer etc., and possesses integratedly: circular annulus 45; A plurality of (being eight in illustrated example) tooth portion 46, these tooth portions 46 are outstanding towards radially inner side from the inner peripheral surface of this annulus 45.A plurality of tooth portion 46 forms in the mode along the constant interval of circumferentially spaced.In addition, as shown in Figure 6, each tooth portion 46 is made of base portion 46a and leading section 46b, and the circumferential width of base portion 46a is littler than leading section 46b, and leading section 46b forms the shape of expanding significantly to circumferential both sides from base portion 46a.And, to the base portion 46a of this tooth portion 46 be wound with excitation with and the coil 43 of output usefulness.
As shown in Figure 5, insulator 44 forms ring-type by the insulating material of synthetic resin etc.In addition, as shown in Figure 1, insulator 44 is disposed at the face of the axial both sides of stator core 42 respectively.And as shown in Figure 6, insulator 44 has the covering portion 48 with tooth portion 46 coverings of stator core 42, and this covering portion 48 makes tooth portion 46 and coil 43 insulation.
The covering portion 48 of insulator 44 radially has a pair of wall 50a of portion, 50b, and is wound with coil 43 between this a pair of wall 50a of portion, 50b.On the insulator 44 of an axial face that is disposed at stator core 42, be formed with the 51(of connector portion with reference to Fig. 5), this connector portion 51 possesses the terminal that coil 43 is connected.In addition, at the axial end portion of this insulator 44, the cap assembly 52(of the ring-type that coil 43 is covered from the axial outside is installed with reference to Fig. 1 ~ 3).
As shown in Figure 5, resolver rotor 13 forms and axle times angle corresponding shape.In the present embodiment, use axle times angle to be the resolver rotor of 2X, and the outer peripheral face of resolver rotor 13 forms the substantially elliptical shape under the situation of top view (end on observation), and separates gap (space) δ 1, δ 2 and opposed with the tooth portion 46 of resolver stator 12.
If rotating shaft 11 rotations, then also rotation integratedly of resolver rotor 13, thus the size in the gap between each tooth portion 46 of resolver stator 12 and the resolver rotor 13 changes.And, if at the exciting coil 43 of resolver stator 12 alternating current of flowing through, then produce the output voltage corresponding with the variation of the size in this gap at the coil 43 of output usefulness.The coil 43 of output usefulness is by the SIN(sine) coil and the COS(cosine of ripple output usefulness) coil of ripple output usefulness constitutes, these coils with respect to a plurality of tooth portion 46 along circumferentially alternatively setting.And for the amplitude variations of the coil of SIN ripple output usefulness and the output voltage of the coil of COS ripple output usefulness, the 90 ° of phase places that stagger can detect the anglec of rotation of rotating shaft 11 by above-mentioned output voltage being carried out the signal processing.In the present embodiment, because the axle times angle of resolver rotor 13 is 2X, so in the once rotation of resolver rotor 13, export the voltage in two cycles.
In addition, in the present embodiment, the excitation that is wound in each tooth portion 46 is 10 ~ 35 circles (being more preferably 25 circles) with the number of turn of coil, and output is 20 ~ 120 circles (being more preferably 80 encloses) with the number of turn of coil, compares with existing known resolver and has reduced the number of turn.
As shown in Figure 5, in present embodiment (embodiment), be the major diameter part of resolver rotor 13 and the gap delta 1 between the tooth portion 46 with maximum gap delta 2 for the gap delta 1 of the minimum between the tooth portion 46 of the outer peripheral face of resolver rotor 13 and resolver stator 12 be the minor axis of resolver rotor 13 partly and for the gap delta 2 between the tooth portion 46, the two is set at following ratio (δ 2/ δ 1).
6.0≤δ2/δ1≤9.0
In addition, this ratio (below, be also referred to as " gap than ") is more preferably and is set at δ 2/ δ 1=8.0.
Minimum clearance δ 1 is more preferably in the scope of 0.2mm≤δ 1≤0.8mm and is set at δ 1=0.5mm.Below, this minimum clearance δ 1 is elaborated with the relation of maximal clearance δ 2.
For existing resolver, minimum clearance δ 1 is about δ 2/ δ 1=4.0 with the gap ratio of maximal clearance δ 2, and minimum clearance δ 1 is more than the 1.0mm.Therefore, in the present embodiment, minimum clearance δ 1 compared with the past diminishes, and maximal clearance δ 2 is bigger than change with respect to the gap of minimum clearance δ 1.
Fig. 7 and Fig. 8 are the charts that schematically shows the waveform (SIN ripple, COS ripple) of exporting the output voltage of using coil.As can be seen, in an embodiment, the maximum of comparing output voltage with conventional example becomes big, and the amplitude of output voltage becomes big in Fig. 7 and Fig. 8.That is, can increase output voltage by the minimum clearance δ 1 that dwindles compared with the past, and by increase compared with the past gap can increase output voltage compared with the past than (δ 2/ δ 1) amplitude.
If increase the amplitude of output voltage, then the S/N ratio improves, thereby can access stable output.That is, if include constant error (interferences) in the output voltage, the ratio that occupies in this output voltage of the more big then error of the amplitude of output voltage is more little so, so can improve the S/N ratio.
In addition, if increase the amplitude of output voltage, then can dwindle the error (angular error) of the anglec of rotation.For this point, below use mathematical expression to be elaborated.
With exciting voltage V
EXPut on the excitation of the tooth portion 46 that is wound in resolver stator 12 with under the situation of coil, if cause voltage V1, V2 respectively at the coil of SIN ripple output usefulness and the coil of COS ripple output usefulness, then this voltage V1, V2 can utilize ensuing formula (1) and formula (2) expression respectively.
[formula 1]
V1＝KV
EX sinθ ……(1)
[formula 2]
V2＝KV
EX cosθ ……(2)
Herein, θ represents the anglec of rotation (position of rotation) of resolver rotor 13, and K represents to export the transformation ratio with coil.
In addition, according to formula (1) and formula (2), anglec of rotation θ can represent like that suc as formula (3).
[formula 3]
Herein, tan
-1Main value be-90 ° ~+90 °, at V
EXWhen being same-sign with V1, θ
0=0 °, at V
EXWhen being distinct symbols with V1, θ
0=180 °.
If there is some deviation in the inscape of resolver 10, then anglec of rotation θ may comprise error.For example, produced under the eccentric situation, namely at resolver 10, if resolver stator 12 produces dislocation with the axle center of resolver rotor 13, then the transformation ratio K of the coil of the coil of SIN ripple output usefulness and COS ripple output usefulness produces deviation, and therefore, it is inconsistent with tan θ that V1/V2 becomes.In addition, if the electrical characteristics of testing circuit exist the element of deviation or forming circuit to have deviation, then DC component puts on V1, V2, thereby produces skew (offset).
If will be made as β based on the error of transformation ratio K, will be made as α 1, α 2 based on the error of voltage V1, V2, then can be such suc as formula (4), will be from the anglec of rotation θ e modelling that comprises error of resolver 10 detections.Herein, θ represents not comprise the real anglec of rotation of error.
[formula 4]
As mentioned above, in present embodiment (embodiment), for the gap of resolver stator 12 and resolver rotor 13, by the minimum clearance δ 1 that dwindles compared with the past, and increase compared with the past maximal clearance δ 2 ratios with respect to minimum clearance δ 1 (gap ratio), thereby the amplitude of increase output voltage compared with the past.Herein, (amplitude of the output voltage of C=(embodiment)/(amplitude of existing output voltage)＞1 when the ratio of the amplitude of the output voltage of the amplitude of the output voltage that makes embodiment and conventional example is C), with respect to the conventional example by formula (4) expression, in an embodiment, the anglec of rotation θ e that comprises error represents as ensuing formula (5).
[formula 5]
If formula (4) and formula (5) are compared, then in the prior embodiment, the error of output voltage V 1, V2 is α 1, α 2, and in an embodiment, this error becomes (α 1/C), (α 2/C).Because C＞1, so α 1＞(α 1/C), α 2＞(α 2/C), embodiment compares the error (angular error) that has reduced to be contained in anglec of rotation θ e with conventional example as can be seen.
In the above-described embodiment, since resolver stator 12 and rolling bearing 14 by case member 15 by integrated (becoming a unit), so can be rotated the axes alignment of resolver stator 12 and rolling bearing 14 exactly, the resolver rotor 13 that is assembled in the rotating shaft 11 of this rolling bearing 14 and is installed on this rotating shaft 11 also is improved with the assembly precision of resolver stator 12.Therefore, the tooth portion 46 of resolver stator 12 and gap delta 1, the δ 2 of the outer peripheral face of resolver rotor 13 can be set exactly, particularly, minimum clearance δ 1 littler value can be made as.If can like this minimum clearance δ 1 be made as littler value, even then the value of maximal clearance δ 2 is not made as so greatly, also can increase maximal clearance δ 2 with respect to the ratio of minimum clearance δ 1.
For example, consider that the ratio with minimum clearance δ 1 and maximal clearance δ 2 is set at the situation of δ 2/ δ 1=8.0.If minimum clearance δ 1 is 1.0mm as the conventional example, then maximal clearance δ 2 must be set at 8.0mm in order to satisfy above-mentioned ratio, thereby need sets the minor axis of resolver rotor 13 very little.Because the minor axis of resolver rotor 13 can't be littler than the external diameter of rotating shaft 11, so under the bigger situation of the external diameter of rotating shaft 11, can't realize that the possibility of above-mentioned ratio is higher.
Relative therewith, as present embodiment, minimum clearance δ 1 is being made as under the situation of 0.5mm, as long as maximal clearance δ 2 is made as 4.0mm, thereby the value of δ 2 can be made as than about the little 4.0mm of conventional example.Therefore, can not be vulnerable to restriction based on the external diameter of rotating shaft 11.
In addition, in the present embodiment, the gap ratio is set at 6.0≤(δ 2/ δ 1)≤9.0., the minor axis of resolver rotor 13 must be dwindled significantly as described above than under the situation of (δ 2/ δ 1)＞9.0 in the gap, and this point is owing to the relation of rotating shaft 11 with external diameter is difficult to realize.
On the other hand, under the situation of (δ 2/ δ 1)＜6.0, formula (5) is represented as the aforementioned at the gap ratio, owing to no longer set amplitude ratio C so big, so also can't narrow down to angular error so little.
Show by chart respectively among Fig. 9 and the gap ratio be made as (δ 2/ δ 1)=4.0(wherein, δ 1=0.5, δ 2=2.0) comparative example be made as (δ 2/ δ 1)=6.0(wherein, δ 1=0.5, δ 2=3.0) the angular error of embodiment.Under the situation of comparative example, in anglec of rotation θ=0 ° ~ 360 ° integral body, angular error periodically significantly changes highlightedly in each small rotation angle, and this error range is-0.64 ° ~ 0.75 °.This is considered to owing to the gap enlarges markedly than angular error in the little gap that causes between the tooth portion 46 of resolver stator 12.Relative therewith, under the situation of embodiment, to compare with comparative example, angular error gently changed with the cycle of each bigger anglec of rotation, and this error range is-0.20 ° ~ 0.55 °.Therefore, by the gap ratio being made as (δ 2/ δ 1)=6.0((δ 2/ δ 1) 〉=6.0), compare the maximum (absolute value) that can dwindle angular error with comparative example, and can dwindle this error range.In addition, the scope of suitable gap ratio is 6.0≤(δ 2/ δ 1)≤8.0 more.
For the resolver 10 of present embodiment, resolver stator 12 and rolling bearing 14 are by case member 15 and by integrated, therefore compare with the situation that these parts splits constitute, can easily be rotated the operation of transformer 10 and rolling bearing 14, with respect to the assembling of housing 35 and rotating shaft 11.
Because case member 15 possesses plectane portion 27 between fitting portion 25 and outer ring installation portion 24, thus for resolver stator 12 with respect to the chimeric and outer ring 21 of fitting portion 25 for outer ring installation portion 24 chimeric, can not impact mutually.For example, even if by making outer ring 21 and outer ring installation portion 24 chimeric and produced distortion etc. at outer ring installation portion 24, this influence also can involve fitting portion 25 hardly, thereby tooth portion 46 situation not normal with the gap of resolver rotor 13 of resolver stator 12 also can not occur.
The utility model is not limited to above-mentioned execution mode, can suitably change in the scope of the utility model that claims are put down in writing.
For example, the shape of the number of the tooth portion 46 of resolver stator 12, shape, resolver rotor 13 etc. is not limited to above-mentioned execution mode, and can suitably adopt existing known structure.The axle times angle of resolver rotor 13 also can be 3X, 4X etc.
In the above-described embodiment, for the outer ring installation portion 24 of case member 15, outer peripheral face by making outer ring 21 and inner circumferential surface is chimeric that outer ring 21 is installed, but inner peripheral surface that also can be by making outer ring 21 and the chimeric outer ring 21 of installing of outer peripheral face of outer ring installation portion 24.In addition, outer ring installation portion 24 is not limited to by the chimeric outer ring 21 of installing, also can be by welding, the bonding installation, still can be only by with 28 welding of inward flange portion, the bonding installation.
Claims (5)
1. resolver, it possesses:
The resolver stator of ring-type, it is provided with, and excitation is used and the coil of output usefulness; And
The resolver rotor, it is installed on rotating shaft and is disposed at the radially inner side of described resolver stator, and has outer peripheral face, and the gap radially between the inner peripheral surface of described outer peripheral face and described resolver stator is along circumferentially changing, described resolver is characterised in that
When being made as δ 1 in the gap with the minimum between the outer peripheral face of the inner peripheral surface of described resolver stator and described resolver rotor and the gap of maximum being made as δ 2, δ 2 is set at 6.0 ≦ δ, 2/ δ 1 ≦ 9.0 with respect to ratio δ 2/ δ 1 of δ 1.
2. resolver according to claim 1 is characterized in that,
The gap delta 1 of described minimum is set to 0.2mm ≦ δ 1 ≦ 0.8mm.
3. the rolling bearing system with resolver is characterized in that, possesses:
Claim 1 or 2 described resolvers;
Rolling bearing, it has inner ring, outer ring and is disposed at rolling element between inner ring and the outer ring in the mode that can roll, this rolling bearing with described rotating shaft supporting for rotating freely; And
Case member, the outer ring of described resolver stator and described rolling bearing is installed on this case member,
Described resolver stator and described rolling bearing are by described case member and assembled as a unit.
4. the rolling bearing system of band resolver according to claim 3 is characterized in that,
Described case member possesses: the fitting portion of barrel shape, and it has inner peripheral surface, and the outer peripheral face of described resolver stator is embedded in this this inner peripheral surface; And the outer ring installation portion, it forms the barrel shape different with described fitting portion diameter, and the outer peripheral face of the outer ring of described rolling bearing is chimeric with respect to the inner peripheral surface of this outer ring installation portion,
Between described outer ring installation portion and described fitting portion, be provided with along plectane portion radially.
5. the rolling bearing system of band resolver according to claim 4 is characterized in that,
Plastic working by sheet material forms described outer ring installation portion, described fitting portion and described plectane portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-198305 | 2011-09-12 | ||
| JP2011198305A JP2013061171A (en) | 2011-09-12 | 2011-09-12 | Resolver and rolling bearing device with resolver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203118749U true CN203118749U (en) | 2013-08-07 |
Family
ID=48185971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220459843 Expired - Fee Related CN203118749U (en) | 2011-09-12 | 2012-09-10 | Rotary transformer and rolling bearing device with rotary transformer |
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| Country | Link |
|---|---|
| JP (1) | JP2013061171A (en) |
| CN (1) | CN203118749U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103680896A (en) * | 2013-12-20 | 2014-03-26 | 保定天威保变电气股份有限公司 | High-capacity rotating transformer structure |
| CN106382948A (en) * | 2016-10-31 | 2017-02-08 | 山东日发纺织机械有限公司 | Novel counting device of rapier loom |
| CN113130193A (en) * | 2019-12-30 | 2021-07-16 | 北京新能源汽车股份有限公司 | Permanent magnet synchronous motor rotary transformer and automatic zero setting method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529168A (en) * | 2015-12-28 | 2016-04-27 | 上海赢双电机有限公司 | High-voltage resistance and high-reliability variable-reluctance resolver |
-
2011
- 2011-09-12 JP JP2011198305A patent/JP2013061171A/en not_active Withdrawn
-
2012
- 2012-09-10 CN CN 201220459843 patent/CN203118749U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103680896A (en) * | 2013-12-20 | 2014-03-26 | 保定天威保变电气股份有限公司 | High-capacity rotating transformer structure |
| CN106382948A (en) * | 2016-10-31 | 2017-02-08 | 山东日发纺织机械有限公司 | Novel counting device of rapier loom |
| CN113029210A (en) * | 2016-10-31 | 2021-06-25 | 山东日发纺织机械有限公司 | Novel counting device of rapier loom |
| CN113130193A (en) * | 2019-12-30 | 2021-07-16 | 北京新能源汽车股份有限公司 | Permanent magnet synchronous motor rotary transformer and automatic zero setting method thereof |
| CN113130193B (en) * | 2019-12-30 | 2023-10-31 | 北京新能源汽车股份有限公司 | Permanent magnet synchronous motor rotary transformer and automatic zero setting method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013061171A (en) | 2013-04-04 |
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