CN206556672U - A kind of Rotary transformer system and the rotary body with this Rotary transformer system - Google Patents
A kind of Rotary transformer system and the rotary body with this Rotary transformer system Download PDFInfo
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- CN206556672U CN206556672U CN201720061016.2U CN201720061016U CN206556672U CN 206556672 U CN206556672 U CN 206556672U CN 201720061016 U CN201720061016 U CN 201720061016U CN 206556672 U CN206556672 U CN 206556672U
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Abstract
The utility model proposes Rotary transformer system and the rotary body with this Rotary transformer system.The Rotary transformer system includes at least two rotary transformers, at least including the first rotary transformer and the second rotary transformer；Each rotary transformer includes stator and rotor, and stator includes stator and detects tooth, and rotor includes rotor with salient pole；Each rotary transformer includes the multiple coils being wound on stator detection tooth, and the inductance of each coil changes with the change of the anglec of rotation of corresponding rotor；The rotor of first rotary transformer includes and only includes 1 rotor with salient pole；The rotor of second rotary transformer includes the rotor with salient pole of 2 or more than 2；The rotor of at least rotor of the first rotary transformer and the second rotary transformer is set to synchronous axial system.The rotary body also includes rotary body body；The relation of the anglec of rotation of Rotary transformer system and the anglec of rotation of rotary body body into rule.The utility model substantially increases the Absolute position measurement precision of rotor.
Description
Technical field
The utility model belongs to detection technique field, is related to a kind of voltage transformer system and rotary body, especially rotates transformation
Device system and rotary body.
Background technology
Digit Control Machine Tool, the industry such as industrial automation, industrial robot needs quick high accuracy position to control, it is main at present by
Servomotor is realized, and its stationkeeping ability is heavily dependent on the absolute position angle detection on servomotor
Device.
Photo-electric absolute position angle detection device can easily realizing the detection of the motor anglec of rotation because obtaining
Extensive use, but this photo-electric absolute position angle detection device contains photoelectric component and semiconductor devices, thus shaking
Dynamic impact is easy to greatly and in hot environment failure.
Rotary transformer be it is a kind of can realize the anglec of rotation detection sensor, because it is without using optical-electrical converter
Part, thus can be used in the environment of higher temperature.But in existing rotary transformer, on the tooth of stator generally be wound with to
Few three groups of windings so that its manufacturing process is very complicated, and due to the position difference of winding cause the uniformity of rotary transformer by
To adverse effect；Meanwhile, in use, it is easy to because the reasons such as vibratory impulse occur short circuit in winding or open circuit the problems such as and
Rotary transformer is set to fail, reliability is poor.In addition, existing rotary transformer still waits to improve in accuracy of detection.
Utility model content
The purpose of this utility model is to provide the rotation change that a kind of absolute position detection precision can be greatly improved
Depressor system and the rotary body with this Rotary transformer system.
In order to achieve the above object, solution of the present utility model is：
A kind of Rotary transformer system, including at least two rotary transformers；It is fixed that each rotary transformer includes
Son and rotor, stator include stator and detect tooth, and rotor includes rotor with salient pole；Each rotary transformer is described including being wound on
Multiple coils on stator detection tooth, the inductance of each coil changes with the change of the anglec of rotation of corresponding rotor,
The anglec of rotation of the rotor is detected with the change of the inductance according to the coil；At least two rotary transformer is at least wrapped
Include the first rotary transformer and the second rotary transformer；The rotor of first rotary transformer includes and only includes 1 rotor with salient pole；
The rotor of second rotary transformer includes the rotor with salient pole of 2 or more than 2；At least rotor of the first rotary transformer and second
The rotor of rotary transformer is set to synchronous axial system.
It is satisfied by first rotary transformer and the second rotary transformer：Including at least four groups stator coils, every group of stator
Coil includes at least one described coil；All coils connect and compose bridge circuit, and every group of stator coil constitutes described
One bridge arm of bridge circuit；In the bridge circuit, the intersecting bridge arm of each two constitutes a contact in intersection, from each
Junction draws a lead-out wire, is used as the excitation wire or signal wire of the bridge circuit；The bridge circuit, which both had, encourages
Magnet-wire, it may have signal wire；Preferably, in each rotary transformer：The quantity of stator coil interior loop described in each group and
Distribution is identical；The phase of the combination inductance of stator coil described in each group differs 90 degree successively；Preferably, each rotation transformation
In device：The DC component of the inductance of each coil is equal, and the fundamental voltage amplitude of each coil is equal；Preferably, it is each described
Rotary transformer includes four groups of stator coils, the bridge circuit of four bridge legs is constituted, with four contacts, from four contacts
Four lead-out wires are drawn at place, wherein two lead-out wires are excitation wire, two lead-out wires are signal wire in addition；Further preferably
Ground, the excitation wire of each rotary transformer is all connected to two public excitation wires of the Rotary transformer system, often
The individual rotary transformer has two independent signal wires；Or, each rotary transformer has two independent excitations
Line and two independent signal wires.
The stator detection number of teeth of first rotary transformer is 4* (M+1), and M is positive integer；Preferably, the first rotary transformer
Include four groups of stator coils altogether；Every group of stator coil includes at least one coil；Each coil is wound on a stator
Detect on tooth, the quantity of stator coil coil described in each group is identical with distribution；The DC component of the inductance of each coil is equal,
The fundamental voltage amplitude of the inductance of each coil is equal；In four groups of stator coils, the phase of the combination inductance of each group stator coil is successively
Differ first angle；Four groups of stator coils constitute bridge circuit；Four contacts of the bridge circuit draw four lead-out wires；Institute
State in four lead-out wires, two lead-out wires are excitation wire, and are connected with the excitation wire of the Rotary transformer system, two in addition
Lead-out wire is signal lead-out wire；First angle is setting value；It is further preferred that first angle is 90 degree.
The stator detection number of teeth of second rotary transformer is 4* (K+1) * S, and rotor with salient pole number is (K+1) * (2N-1) * S；Its
In, K, S and N are positive integer；Preferably, the second rotary transformer includes four groups of stator coils altogether；Every group of stator coil includes
At least one coil；Each coil is wound on a stator detection tooth, the number of stator coil coil described in each group
Measure and be distributed identical；The DC component of the inductance of each coil is equal, and the fundamental voltage amplitude of the inductance of each coil is equal；Four groups are determined
In subcoil, the phase of the combination inductance of each group stator coil differs second angle successively；Four groups of stator coil composition bridge-type electricity
Road；Four contacts of the bridge circuit draw four lead-out wires；In four lead-out wires, two lead-out wires are excitation wire,
And be connected with the excitation wire of the Rotary transformer system, two lead-out wires are signal lead-out wire in addition；Second angle is setting
Value；It is further preferred that second angle is 90 degree.
The stator also includes stator and decouples tooth；The both sides of each stator detection tooth for being wound with coil are respectively provided with least one
The stator decouples tooth, is disturbed with the magnetic coupling being wound between the stator of coil detection tooth for reducing or eliminating different；Preferably,
The material of the stator decoupling tooth detects that the material of tooth and stator body is identical with the stator；It is further preferred that the material
Expect for permeability magnetic material.
Or, in the first rotary transformer, the stator detection number of teeth is 4, and the stator decoupling number of teeth is 4.
Or, in the second rotary transformer, the stator detection number of teeth is 4*P, and rotor with salient pole number is Q；Wherein, P and Q is just whole
Number, and Q/P is not equal to even number, and when P is equal to 3*R and R is positive integer, Q is not equal to 2*R positive integer times.
The stator detection number of teeth of second rotary transformer is 8, and rotor with salient pole number is 2* (2N-1)；Or, the second rotation becomes
The stator detection number of teeth of depressor is 12, and rotor with salient pole number is 3* (2N-1)；Or, the stator detection number of teeth of the second rotary transformer
For 16, rotor with salient pole number is 4* (2N-1)；Or, the stator detection number of teeth of the second rotary transformer is 20, and rotor with salient pole number is
5*(2N-1)；Or, the stator detection number of teeth of the second rotary transformer is 24, and rotor with salient pole number is 6* (2N-1)；Or, second
The stator detection number of teeth of rotary transformer is 28, and rotor with salient pole number is 7* (2N-1)；Or, the stator inspection of the second rotary transformer
It is 32 to survey the number of teeth, and rotor with salient pole number is 8* (2N-1).
In the rotary transformer, the shape of the rotor with salient pole is set, to cause the inductance of each coil
Changing unit is changing into sine wave type change with the anglec of rotation of the rotor；Or, in the rotary transformer, if
Put the shape of the rotor with salient pole, with cause each coil inductance changing unit with the anglec of rotation of the rotor
Be changing into triangle waves change.
The Rotary transformer system has stator cage, end cap, bearing and rotating shaft；Each rotary transformer is determined
Son includes stator core, and the stator core is arranged on the stator cage；The rotor of each rotary transformer
Include rotor core, and the rotor core is arranged in the rotating shaft, is rotated together with the rotating shaft.
In each rotary transformer, the rotor is arranged in the inside of the stator；Or, become in each rotation
In depressor, the rotor is arranged in the outside of the stator.
A kind of rotary body with above-mentioned Rotary transformer system, the rotary body includes rotary body body and the rotation
Voltage transformer system；The anglec of rotation of the anglec of rotation of the Rotary transformer system and the rotary body body is into the pass of rule
System, to detect the anglec of rotation of the rotary body by the Rotary transformer system.
Each rotor core of the Rotary transformer system is arranged in the rotating shaft of the rotary body body, with the rotation
Body body synchronous axial system and formation integral structure, to detect the anglec of rotation of the rotary body body；The rotary transformer
Each stator of system is arranged on the casing shared with the rotary body body.
Or, the Rotary transformer system is fixed on the end of the rotary body body；The Rotary transformer system
Rotating shaft be connected to cause the Rotary transformer system and the rotary body body coaxial with the rotating shaft of the rotary body body
Rotate；Preferably, the rotating shaft of the Rotary transformer system is connected with the rotating shaft of the rotary body body by shaft coupling.
The rotary body body is motor.
Due to using such scheme, the beneficial effects of the utility model are：The utility model Rotary transformer system and tool
The rotary body for having this Rotary transformer system uses at least two rotary transformers, especially magnetoresistance transformer, one
The angle that the detection of individual rotary transformer is obtained is interval for monodrome in the 0-360 degree that rotor is rotated, another or multiple rotation transformations
Device carries out 2 or more than 2 in the 0-360 degree that rotor is rotated is interval and detected periodically, the knot with previous rotary transformer
Fruit combines can be interval for subdivision test, so as to substantially increase accuracy of detection.Meanwhile, the utility model can be each fixed
At most around a coil on son detection tooth, production technology is enormously simplify, be effectively prevent because the position difference of winding causes
The uniformity of rotary transformer is adversely affected, and overcomes the short circuit on same stator tooth in the prior art between different windings
Risk.In addition, stator decoupling tooth also can be set in the utility model, the different stator inspections for being wound with coil are effectively reduced or eliminated
The magnetic coupling interference surveyed between tooth, so as to further increase reliability of the present utility model.
Brief description of the drawings
Fig. 1 a are the schematic cross-section of the rotor of the first rotary transformer in the utility model first embodiment；
Fig. 1 b are the schematic cross-section of the rotor of the second rotary transformer in the utility model first embodiment；
Fig. 2 is that the circuit connection after the bridge circuit connection of two rotary transformers in the utility model first embodiment is shown
It is intended to；
Fig. 3 is the structural representation of Rotary transformer system in the utility model first embodiment；
Fig. 4 a are the schematic cross-section of the rotor of the first rotary transformer in the utility model second embodiment；
Fig. 4 b are the schematic cross-section of the rotor of the second rotary transformer in the utility model second embodiment；
Fig. 5 a are the schematic cross-section of the rotor of the first rotary transformer in the utility model 3rd embodiment；
Fig. 5 b are the schematic cross-section of the rotor of the second rotary transformer in the utility model 3rd embodiment；
Fig. 6 is the structural representation of the rotary body with rotary transformer in the utility model fourth embodiment；
Fig. 7 is the structural representation of the rotary body with rotary transformer in the embodiment of the utility model the 5th.
In accompanying drawing：1101A、1104A、1107A、1110A：Stator detects tooth；1101B-1112B：Stator detects tooth；201：
The stator of first rotary transformer；202：The stator of second rotary transformer；301：The rotor of first rotary transformer；302：The
The rotor of two rotary transformers；4：Rotating shaft；5：Bearing；6：Stator cage；701~702：End cap；801A~804A：First rotation
The lead-out wire of transformer；801B~804B：The lead-out wire of second rotary transformer；2101A-2104A：Stator detects tooth；
2101B-2108B：Stator detects tooth；3101A-3132A：Stator detects tooth；3101B-3124B：Stator detects tooth；401：Rotation
The casing that transformer is shared with motor；4021：The stator of first rotary transformer；4022：The stator of second rotary transformer；
403：The stator of motor；4041：The rotor core of first rotary transformer；4022：The rotor core of second rotary transformer；
405th, the rotor core of motor；406th, rotating shaft；4071~4072, end cap；408th, bearing；4091~4096, rotary transformer
The lead-out wire of system；4010th, the lead of motor；40111st, the coil of the first rotary transformer；40112nd, the second rotation transformation
The coil of device；4012nd, motor winding；5011st, the first rotary transformer；5012：Second rotary transformer；502：Motor；
503：Motor rotary shaft；5041：The lead-out wire group of first rotary transformer；5042：The lead-out wire group of second rotary transformer；
505：Motor lead line；506：Screw.
Embodiment
The utility model is further described below in conjunction with accompanying drawing illustrated embodiment.
The utility model proposes a kind of Rotary transformer system, the Rotary transformer system especially reluctance type rotation becomes
Depressor system, rotary transformer therein especially magnetoresistance transformer.The Rotary transformer system includes at least two
Rotary transformer.Each rotary transformer includes stator and rotor, and stator includes stator and detects tooth, and it is convex that rotor includes rotor
Pole.Each rotary transformer includes multiple coils being wound on stator detection tooth, and the inductance of each coil is with corresponding rotor
The anglec of rotation change and change, with the inductance according to coil change detect rotor the anglec of rotation.At least two rotations
Transformer at least includes the first rotary transformer and the second rotary transformer.The rotor of first rotary transformer includes and only included
1 rotor with salient pole；The rotor of second rotary transformer includes the rotor with salient pole of 2 or more than 2.The Rotary transformer system
In, the rotor of at least rotor of the first rotary transformer and the second rotary transformer is set to synchronous axial system.
It is satisfied by first rotary transformer and the second rotary transformer：Including at least four groups stator coils, every group of stator
Coil includes at least one described coil；All coils connect and compose bridge circuit, and every group of stator coil constitutes described
One bridge arm of bridge circuit, each bridge arm is made up of or in series by multiple coils a coil.In bridge circuit, every two
Individual intersecting bridge arm constitutes a contact in intersection, draws a lead-out wire from each junction, is used as encouraging for bridge circuit
Magnet-wire for the bridge circuit to provide excitation voltage, or the sign detected as signal wire with exporting the rotary transformer turns
The signal of sub- absolute position.But, each bridge circuit both has excitation wire, it may have signal wire.Advantageously, each rotation
In transformer：The quantity of each group stator coil interior loop is identical with distribution；The phase of the combination inductance of each group stator coil is successively
90 degree of difference.
Advantageously, in each rotary transformer：The DC component of the inductance of each coil is equal, the fundamental voltage amplitude of each coil
It is equal.
Preferably, each rotary transformer includes four groups of stator coils, the bridge circuit of four bridge legs is constituted, with four
Contact, four lead-out wires are drawn from four junctions, wherein two lead-out wires are excitation wire, two lead-out wires are signal in addition
Line.The excitation wire of each rotary transformer is all connected to two public excitation wires of Rotary transformer system, and each rotation becomes
Depressor has two independent lead-out wires；Or, each rotary transformer has two independent excitation wires and two independent letters
Number line.
Preferably, stator also includes stator decoupling tooth, is provided with the both sides of each stator detection tooth for being wound with coil
At least one stator decouples tooth, to be reduced or eliminated between different (especially adjacent) stator detection teeth for being wound with coil
Magnetic coupling is disturbed；The material of stator decoupling tooth detects that the material of tooth and stator body is identical with stator, and the material is permeability magnetic material.
In the utility model, the stator of the first rotary transformer can be set to detect that the number of teeth is 4* (M+1), M is positive integer；Now,
Both stator decoupling tooth can be set in one rotary transformer, stator decoupling tooth can also be not provided with.
In the utility model, the stator of the second rotary transformer can be set to detect that the number of teeth is 4* (K+1) * S, rotor with salient pole
Number is (K+1) * (2N-1) * S；Wherein, K, S and N are positive integer.Now, stator can be both set in the second rotary transformer
Tooth is decoupled, stator decoupling tooth can also be not provided with.
Therefore, in the utility model, the stator detection number of teeth that may be selected to set the second rotary transformer is 8, rotor with salient pole
Number is 2* (2N-1)；The stator detection number of teeth that may be selected to set the second rotary transformer is 12, and rotor with salient pole number is 3* (2N-1)；
The stator detection number of teeth that may be selected to set the second rotary transformer is 16, and rotor with salient pole number is 4* (2N-1)；It may be selected to set the
The stator detection number of teeth of two rotary transformers is 20, and rotor with salient pole number is 5* (2N-1)；It may be selected to set the second rotary transformer
Stator detection the number of teeth be 24, rotor with salient pole number be 6* (2N-1).It may be selected to set the stator of the second rotary transformer to detect tooth
Number is 28, and rotor with salient pole number is 7* (2N-1).The stator detection number of teeth that may be selected to set the second rotary transformer is 32, and rotor is convex
Number of poles is 8* (2N-1).
In addition, in the utility model, the stator of the second rotary transformer can also be set to detect that the number of teeth is 4*P, rotor
Salient pole number is Q；Wherein, P and Q is positive integer, and Q/P is not equal to even number, and when P is equal to 3*R and R is positive integer, Q is not
Positive integer times equal to 2*R.Now, stator former is necessarily also included in stator and decouples tooth.
In the utility model, the stator of the first rotary transformer can also be set to detect that the number of teeth is 4, the stator decoupling number of teeth is
4.Stator decoupling tooth is that stator former decouples tooth.
Preferably, the first rotary transformer includes four groups of stator coils altogether；Every group of stator coil includes at least one coil；
Each coil is wound on a stator detection tooth, and the quantity of each group stator coil coil is identical with distribution；The electricity of each coil
The DC component of sense is equal, and the fundamental voltage amplitude of the inductance of each coil is equal；In four groups of stator coils, the conjunction of each group stator coil
Phase into inductance differs first angle successively.Four groups of stator coils constitute bridge circuit.Four contacts of the bridge circuit draw
Go out four lead-out wires.In this four lead-out wires, two lead-out wires are excitation wire, and are connected with the excitation wire of Rotary transformer system
Connect, two lead-out wires are signal lead-out wire in addition；First angle is setting value.It is further preferred that first angle is 90 degree.
Preferably, the second rotary transformer includes four groups of stator coils altogether；Every group of stator coil includes at least one coil；
Each coil is wound on a stator detection tooth, and the quantity of stator coil coil described in each group is identical with distribution；Each coil
Inductance DC component it is equal, the fundamental voltage amplitude of the inductance of each coil is equal；In four groups of stator coils, each group stator coil
The phase of combination inductance differ second angle successively.Four groups of stator coils constitute bridge circuit.Four of the bridge circuit connect
Point draws four lead-out wires；In this four lead-out wires, two lead-out wires are excitation wire, and with the excitation wire of Rotary transformer system
Connection, two lead-out wires are signal lead-out wire in addition；Second angle is setting value.It is further preferred that second angle is 90 degree.
In the utility model, two excitation wires of the first rotary transformer and two excitation wires of the second rotary transformer are equal
It can be connected, be shared equivalent to the first rotary transformer and the second rotary transformer with the public excitation wire of Rotary transformer system
Two excitation wires, but two signal wires of the first rotary transformer are only relative to two signal wires of the second rotary transformer
Vertical.Now, in detection process, when for the first rotary transformer and the second rotation transformation application excitation, rotation is passed through
Two public excitation wires of voltage transformer system are carried out, so as to apply identical excitation signal to both.Now, become in the first rotation
In depressor and the combination of the second rotary transformer, six roots of sensation lead-out wire is had.Two lead-out wires are the first rotary transformer and the second rotation
Change the shared excitation wire of depressor, two lead-out wires are the independent signal wire of the first rotary transformer, two lead-out wires are the
The independent signal wire of two rotary transformers.
Certainly, two excitation wires of the first rotary transformer and two excitation wires of the second rotary transformer can also be relative
In other side to be independent, now two piece signal wires of two signal wires of the first rotary transformer relative to the second rotary transformer
Also it is still independent.Now, in detection process, when being that the first rotary transformer and the second rotary transformer apply excitation
When, it is necessary to carried out by both respective two excitation wires, be that the excitation signal that both are applied can be identical, can also
It is different.Now, in the first rotary transformer and the combination of the second rotary transformer, eight lead-out wires are had.Two extractions
Line is the independent excitation wire of the first rotary transformer, and two lead-out wires are the independent excitation wire of the second rotary transformer, two
Root lead-out wire is the independent signal wire of the first rotary transformer, and two lead-out wires are the independent signal of the second rotary transformer
Line.
In the utility model, stator includes stator core, coil, lead-out wire and insulator (in particular insulation framework) etc..
Stator core is made up of permeability magnetic material, and stator core slots to form stator detection tooth along inner periphery, and coil is wound on stator detection tooth
On, insulator is provided between coil and stator core, the insulator is insulation framework or the material for playing insulating effect.Rotor bag
Include the rotor core rotated with rotor coaxial.Rotor core is made up of permeability magnetic material, and rotor core excircle is in salient pole shape, thus
Rotor includes rotor with salient pole.
First embodiment：
In first embodiment, the stator detection number of teeth takes according to foregoing 4* (M+1) value, now M in the first rotary transformer
It is worth for 2, thus the stator detection number of teeth of the first rotary transformer is 12, rotor with salient pole number is 1.Stator in second rotary transformer
The number of teeth and rotor with salient pole number are detected respectively according to 4* (K+1) * S and (K+1) * (2N-1) * S values, wherein K values are 2, S values
It is 2 for 1, N values, thus the stator detection number of teeth of the second rotary transformer is 12, rotor with salient pole number is 9.
Fig. 1 a are the schematic cross-section of the rotor of the first rotary transformer in the present embodiment；Fig. 1 b are the in the present embodiment
The schematic cross-section of the rotor of two rotary transformers.In first rotary transformer and the second rotary transformer, stator includes
Stator core, rotor includes rotor core, and stator core and rotor core are stamped and formed out using silicon steel sheet.First rotation becomes
Stator core inner surface of the 12 stators detection tooth of depressor and the second rotary transformer along place is uniformly distributed；Second rotation becomes
The excircle of rotor core of 9 rotor with salient pole of depressor along the second rotary transformer is uniformly distributed.
For the first rotary transformer, it is wound with 1 coil, 12 stator detection teeth and has every two stator detection teeth
4 coils, each coil is wound in the insulation framework of a stator detection tooth (not shown in Fig. 1 a), and 4 are wound with determining for coil
Circumferentially distribution is followed successively by 1101A, 1104A, 1107A, 1110A to son detection tooth clockwise.The inductance of each coil with rotor rotation
The change of gyration and change.In the present embodiment, the shape of rotor with salient pole is selected by Electromagnetic Simulation so that the inductance of coil
Changing unit is in sinusoidal variations with the anglec of rotation of rotor.
In first rotary transformer of the present embodiment, stator coil is divided into 4 groups.Every group of stator coil includes 1 coil,
The DC component of the inductance of each coil is equal, and the fundamental voltage amplitude of the inductance of each coil is equal.The synthesis of each group stator coil
The phase of inductance differs 90 degree successively.Four groups of stator coils constitute bridge circuit, and Fig. 2 show bridge-type in the first rotary transformer
Circuit diagram in circuit and the second rotary transformer after bridge circuit connection, wherein being the first rotation transformation close to the part in left side
Bridge circuit in device.In Fig. 2, the bridge arm X of bridge circuitAC1Detect that the coil on tooth 1101A is constituted by stator, bridge arm XAD1By
Coil on stator detection tooth 1104A is constituted, bridge arm XBC1Detect that the coil on tooth 1107A is constituted by stator, bridge arm XBD1By fixed
Coil on son detection tooth 1110A is constituted.4 contacts A1, B1, C1, D1 of bridge circuit are drawn with 4 leads be used as the respectively
Lead-out wire 801A, 802A, 803A and 804A of one rotary transformer, wherein lead-out wire 801A and 802A are the first rotary transformer
Excitation wire, it is connected in the excitation wire of Rotary transformer system, and lead-out wire 803A and 804A are used as Rotary transformer system
The first signals of rotating transformer line draw.
For the second rotary transformer, being wound with each stator detection tooth on 1 coil, each stator detection tooth has insulation
Bobbin (not shown in Fig. 1 b).12 coils are had on 12 stator detection teeth circumferentially, and 12 stators detect tooth
Circumferentially clockwise distribution be followed successively by 1101B, 1102B, 1103B, 1104B, 1105B, 1106B, 1107B, 1108B, 1109B,
1110B、1111B、1112B.For accompanying drawing for purpose of brevity, and because stator detects that the distribution of tooth and reference are regular
, therefore do not mark each stator to detect the reference of tooth one by one in Figure 1b, only provide several examples.The inductance of each coil with
The change of the anglec of rotation of rotor and change.In the present embodiment, the shape of rotor with salient pole is selected by Electromagnetic Simulation so that coil
Inductance changing unit with rotor the anglec of rotation be in sinusoidal variations.
In second rotary transformer of the present embodiment, stator coil is divided into 4 groups.Every group of stator coil includes 3 coils,
The DC component of the inductance of each coil is equal, and the fundamental voltage amplitude of the inductance of each coil is equal.The synthesis of each group stator coil
The phase of inductance differs 90 degree successively.It is the bridge circuit that four groups of stator coils, which are constituted in bridge circuits, Fig. 2 close to right side,
Circuit diagram.In Fig. 2, the bridge arm X of the bridge circuitAC2The coil series connection structure on tooth 1101B, 1105B and 1109B is detected by stator
Into bridge arm XAD2Detect that the coil on tooth 1102B, 1106B and 1110B is in series by stator, bridge arm XBC2Tooth is detected by stator
Coil on 1103B, 1107B and 1111B is in series, bridge arm XBD2On stator detection tooth 1104B, 1108B and 1112B
Coil is in series.The fundamental phase of the inductance of each coil is equal in same bridge arm, 4 contact A2 of bridge circuit, B2, C2,
D2 draws lead-out wire 801B, 802B, 803B and 804B as the second rotary transformer, wherein lead-out wire with 4 leads respectively
801B and 802B is the excitation wire of the second rotary transformer, and it is connected in the excitation wire of Rotary transformer system, lead-out wire
803B and 804B is drawn as the second signals of rotating transformer line of Rotary transformer system.
The structure that Fig. 3 show the Rotary transformer system including the first rotary transformer and the second rotary transformer is shown
It is intended to.The Rotary transformer system includes stator 201, the stator 202, first of the second rotary transformer of the first rotary transformer
The rotor 301 of rotary transformer, the rotor 302 of the second rotary transformer, rotating shaft 4, bearing 5, stator cage 6, the end cap of both sides
701 and 702, bearing chamber, six roots of sensation lead-out wire.Rotor core is fixed in rotating shaft 4, can be rotated together with rotating shaft 4.Bearing 5 is pacified
In rotating shaft 4, rotate to the support smooth of rotor 301 and 302 of bearing 5.Stator core is fixed on stator cage 6
It is interior.Bearing chamber is arranged on the both sides end cap 701 and 702 of rotary transformer, and the outer ring of bearing 5 is arranged on two Hes of end cap 701
In 702 bearing chamber, it is ensured that the center line of rotating shaft 4 is consistent with the inner circle center line of stator 201 and 202.In six roots of sensation lead-out wire,
Two lead-out wires are excitation wire, and two lead-out wires are the signal wire of the first rotary transformer, and two lead-out wires are that the second rotation becomes
The signal wire of depressor.
In the present embodiment, the principle that sine wave position signalling is produced is as follows：
For the first rotary transformer, stator is made to detect the inductance of the coil on tooth 1101A, 1104A, 1107A, 1110A
Respectively L101A, L104A, L107A and L110A.It can be seen from Fig. 1 a with rotor the anglec of rotation change, each stator
Gap between detection tooth and rotor with salient pole changes so that the inductance of each coil changes therewith, and its period of change is 1.Respectively
The inductance of coil with rotor anglec of rotation θ m1Change can be expressed as
L101A=L1A+Lm1A*sin(θm1) formula (101)
L104A=L1A+Lm1A*sin(θm1- 90) formula (102)
L107A=L1A+Lm1A*sin(θm1- 180) formula (103)
L110A=L1A+Lm1A*sin(θm1- 270) formula (104)
Wherein, L1A is the DC component of each inductance in the first rotary transformer；
Lm1AFor the fundamental voltage amplitude of each inductance in the first rotary transformer；
θm1For the anglec of rotation of rotor.
The circuit diagram of the bridge circuit of reference picture 2, the bridge arm X that the coil on tooth 1101A is constituted is detected by statorAC1Electricity
Feeling L_AC1 is：
L_AC1=L101A=L1A+Lm1A*sin(θm1) formula (105)
The bridge arm X that coil on tooth 1104A is constituted is detected by statorAD1Inductance L_AD1 be：
L_AD1=L104A=L1A+Lm1A*sin(θm1- 90) formula (106)
The bridge arm X that coil on tooth 1107A is constituted is detected by statorBC1Inductance L_BC1 be：
L_BC1=L107A=L1A+Lm1A*sin(θm1- 180) formula (107)
The bridge arm X that coil on tooth 1110A is constituted is detected by statorBD1Inductance L_BD1 be：
L_BD1=L110A=L1A+Lm1A*sin(θm1- 270) formula (108)
From formula (101)-(108), the fundametal compoment of the inductance of four bridge arms of bridge circuit is to differ 90 degree successively
Sine wave, the output voltage for being easy to obtain bridge circuit contact C1 and contact D1 by the simple computation of circuit is phase difference
90 degree of rotation angle θ m1Sinusoidal signal, can access and become respectively into sinusoidal variations and cosine on the anglec of rotation of rotor
The voltage signal of change, this as asks for the basis signal needed for the anglec of rotation of rotor in the prior art, therefore these are basic
Signal sends the signal processing circuit subsequently connected or the anglec of rotation θ m that rotor is can obtain by simple computation to1.By
In this visible first rotary transformer, the inductance that rotor often rotates 1 week coil changes 1 cycle, it is known that the above-mentioned angle, θ tried to achieve
m1It is monodrome in 0-360 degree interval, it is possible thereby to the absolute rotation angle for detecting rotor.
For the second rotary transformer, make stator detect tooth 1101B, 1102B, 1103B, 1104B, 1105B, 1106B,
The inductance of coil on 1107B, 1108B, 1109B, 1110B, 1111B, 1112B be respectively L101B, L102B, L103B,
L104B, L105B, L106B, L107B, L108B, L109B, L110B, L111B and L112B.It can be seen from Fig. 1 b with turn
The change of the anglec of rotation of son, the gap between each stator detection tooth and rotor with salient pole changes so that the inductance of each coil
Change therewith.The inductance of each coil with rotor anglec of rotation θ m1Change can be expressed as.
L101B=L105B=L109B=L1B+Lm1B*sin(9θm1) formula (109)
L102B=L106B=L110B=L1B+Lm1B*sin(9θm1+ 90) formula (110)
L103B=L107B=L111B=L1B+Lm1B*sin(9θm1+ 180) formula (111)
L104B=L108B=L112B=L1B+Lm1B*sin(9θm1+ 270) formula (112)
Wherein, L1B is the DC component of each inductance of the second rotary transformer；
Lm1BFor the fundamental voltage amplitude of each inductance of the second rotary transformer.
Bridge circuit figure shown in reference picture 2, is detected what the coil on tooth 1101B, 1105B and 1109B was constituted by stator
Bridge arm XAC2Inductance L_AC2 be：
L_AC2=L101B+L105B+L109B=3L1B+3Lm1B*sin(9θm1) formula (113)
The bridge arm X that coil on tooth 1102B, 1106B and 1110B is constituted is detected by statorAD2Inductance L_AD2 be：
L_AD2=L102B+L106B+L110B=3L1B+3Lm1B*sin(9θm1+ 90) formula (114)
The bridge arm X that coil on tooth 1103B, 1107B and 1111B is constituted is detected by statorBC2Inductance L_BC2 be：
L_BC2=L103B+L107B+L111B=3L1B+3Lm1B*sin(9θm1+ 180) formula (115)
The bridge arm X that coil on tooth 1104B, 1108B and 1112B is constituted is detected by statorBD2Inductance L_BD2 be：
L_BD2=L104B+L108B+L112B=3L1B+3Lm1B*sin(9θm1+ 270) formula (116)
From formula (109)-(116), the fundametal compoment of the inductance of four bridge arms of bridge circuit is to differ 90 degree successively
Sine wave, the output voltage for being easy to obtain the contact C2 and contact D2 of bridge circuit by the simple computation of circuit is phase
Poor 90 degree of rotation angle θ m1Sinusoidal signal, the anglec of rotation on rotor can be accessed respectively into sinusoidal variations and cosine
The voltage signal of change, this as asks for the basis signal needed for the anglec of rotation of rotor in the prior art, therefore by these bases
Plinth signal sends the signal processing circuit subsequently connected or the anglec of rotation θ m that rotor is can obtain by simple computation to1。
As can be seen here in the second rotary transformer, rotor often rotates 1 week, inductance change 9 cycles, i.e. 40 degree of positions of every turn of rotor of coil
1 cycle of signal intensity is put, thus being combined with the result of the first rotary transformer can be interval for subdivision test, greatly improves
Accuracy of detection.
Second embodiment：
In second embodiment, stator decoupling tooth is provided with two rotary transformers.First rotary transformer is determined
The son detection number of teeth is 4, and rotor with salient pole number is 1.In second rotary transformer stator detection the number of teeth and rotor with salient pole number respectively according to
4P and Q carry out value, and now P values are that 2, Q values are 10, thus the stator detection number of teeth of the second rotary transformer is 8, and rotor is convex
Number of poles is 10.In first rotary transformer, 4 stator decoupling teeth are provided with；In second rotary transformer, 8 stators are provided with
Decouple tooth.
Fig. 4 a are the schematic cross-section of the rotor of the first rotary transformer in the present embodiment；Fig. 4 b are the in the present embodiment
The schematic cross-section of the rotor of two rotary transformers.In first rotary transformer and the second rotary transformer, stator includes
Stator core, rotor includes rotor core, and stator core and rotor core are stamped and formed out using silicon steel sheet.First rotation becomes
Stator core inner surface of the 4 stators detection tooth of depressor along place is uniformly distributed, 8 stators detection of the second rotary transformer
Stator core inner surface of the tooth along place is uniformly distributed；Examined in whole stators of the first rotary transformer and the second rotary transformer
The position for the centre surveyed between tooth sets a stator to decouple tooth.
For the first rotary transformer, 1 coil is wound with each stator detection tooth, 4 stator detection teeth are circumferentially suitable
Hour hands distribution is followed successively by 2101A, 2102A, 2103A, 2104A.The inductance of each coil becomes with the change of the anglec of rotation of rotor
Change.In the present embodiment, the shape of rotor with salient pole is selected by Electromagnetic Simulation so that the changing unit of the inductance of coil is with rotor
The anglec of rotation is in sinusoidal variations.
In first rotary transformer of the present embodiment, stator coil is divided into 4 groups.Every group of stator coil includes 1 coil,
The DC component of the inductance of each coil is equal, and the fundamental voltage amplitude of the inductance of each coil is equal.The synthesis of each group stator coil
The phase of inductance differs 90 degree successively.Four groups of stator coils constitute bridge circuit, the bridge circuit and the second rotation in the present embodiment
The circuit diagram after the connection of bridge circuit figure in transformation depressor can refer in Fig. 2 in first embodiment, the present embodiment this first
The circuit diagram of bridge circuit in rotary transformer can refer to the part close to left side in Fig. 2, be the bridge of now bridge circuit
Arm XAC1Detect that the coil on tooth 2101A is constituted by stator, bridge arm XAD1Detect that the coil on tooth 2102A is constituted by stator, bridge arm
XBC1Detect that the coil on tooth 2103A is constituted by stator, bridge arm XBD1Detect that the coil on tooth 2104A is constituted by stator.Bridge-type electricity
4 contacts A1, B1, C1, the D1 on road respectively with 4 leads draw as the lead-out wire 801A of the first rotary transformer, 802A,
803A and 804A, wherein lead-out wire 801A and 802A are the excitation wire of the first rotary transformer, and it is connected to rotary transformer system
In the excitation wire of system, lead-out wire 803A and 804A is drawn as the first signals of rotating transformer line of Rotary transformer system.
For the second rotary transformer, 1 coil is wound with each stator detection tooth, 8 stator detection teeth are circumferentially suitable
Hour hands distribution is followed successively by 2101B, 2102B, 2103B, 2104B, 2105B, 2106B, 2107B, 2108B.It is succinct for accompanying drawing
For the sake of, and because stator detects that the distribution of tooth and reference are regular, therefore do not mark each stator one by one in fig. 4b
The reference of tooth is detected, several examples are only provided.The inductance of each coil changes with the change of the anglec of rotation of rotor.This reality
Apply in example, pass through Electromagnetic Simulation select rotor with salient pole shape so that the changing unit of the inductance of coil with rotor the anglec of rotation
Degree is in sinusoidal variations.
In second rotary transformer of the present embodiment, stator coil is divided into 4 groups.Every group of stator coil includes 2 coils；
The DC component of the inductance of each coil is equal, and the fundamental voltage amplitude of the inductance of each coil is equal.The synthesis of each group stator coil
The phase of inductance differs 90 degree successively.Four groups of stator coils constitute bridge circuit, and the circuit diagram of the bridge circuit can refer in Fig. 2
Part close to right side, is the bridge arm X of now bridge circuitAC2The coil series connection structure on tooth 2101B, 2105B is detected by stator
Into bridge arm XAD2Detect that the coil on tooth 2102B, 2106B is in series by stator, bridge arm XBC2Tooth 2103B is detected by stator,
Coil on 2107B is in series, bridge arm XBD2Detect that the coil on tooth 2104B, 2108B is in series by stator.Same bridge arm
In each coil inductance fundamental phase it is equal, 4 connecting nodes A2, B2, C2, D2 of bridge circuit are respectively with 4 leads
Lead-out wire 801B, 802B, 803B and 804B as rotary transformer are drawn, wherein lead-out wire 801B and 802B is the second rotation
The excitation wire of transformer is connected in the excitation wire of Rotary transformer system, and lead-out wire 803B and 804B are Rotary transformer system
Second signals of rotating transformer line is drawn.
The present embodiment includes the structure of the Rotary transformer system of the first rotary transformer and the second rotary transformer
Schematic diagram can borrow accompanying drawing Fig. 3 in first embodiment.
Based on such arrangement, the computational methods in first embodiment are readily obtained the first rotary transformer jackshaft
The contact C1 and contact D1 of formula circuit output voltage are the anglec of rotation θ on rotor in the present embodiment that phase differs 90 degree
m2Respectively into sinusoidal variations and into the voltage signal of varies with cosine, this as asks for the anglec of rotation institute of rotor in the prior art
The basis signal needed, therefore these basis signals are sent to the signal processing circuit subsequently connected or pass through simple computation i.e.
It can obtain the anglec of rotation θ m of rotor2.And it can see rotor and often rotate 1 week inductance 1 cycle of change, it is known that be above-mentioned to try to achieve
Angle, θ m2It is monodrome in 0-360 degree interval, it is possible thereby to the absolute rotation angle for detecting rotor.
Equally, based on such arrangement, the computational methods in first embodiment are readily obtained the second rotary transformer
The contact C2 and contact D2 output voltage of bridge circuit be that phase differs 90 degree of the rotation on rotor in the present embodiment
Angle, θ m2Respectively into sinusoidal variations and into the voltage signal of varies with cosine, this as asks for the rotation of rotor in the prior art
Basis signal needed for angle, therefore these basis signals are sent to the signal processing circuit subsequently connected or pass through simple
Calculate the anglec of rotation θ m that can obtain rotor2.As can be seen here in the present embodiment in the second rotary transformer, rotor often rotates 1
Week, the inductance of coil changes 10 cycles, i.e. 36 degree of position signallings of every turn of rotor change 1 cycle, thus becomes with the first rotation
The result of depressor is combined can be interval for subdivision test, greatly improves accuracy of detection.
In the present embodiment, stator decoupling tooth is arranged between two stator detection teeth, is especially placed at two stator detections
The position of centre between tooth.Due to being provided with stator decoupling tooth, therefore actually measured magnitude of voltage and the electricity that calculates in theory
Magnitude of voltage corresponding to inductance value is more closely, so that the precision of the anglec of rotation finally detected is greatly improved；Meanwhile, stator
The setting of decoupling tooth causes the response quickly of system of the rotary transformer to greatly improve, and simplifies the system knot of rotary transformer
Structure.
3rd embodiment：
In 3rd embodiment, the stator detection number of teeth presses 4* (M+1) value in the first rotary transformer, and M values are 7, thus
The stator detection number of teeth of first rotary transformer is 32, and rotor with salient pole number is 1.In second rotary transformer stator detection the number of teeth and
Rotor with salient pole number is respectively by 4* (K+1) * S and (K+1) * (2N-1) * S values, and K values are that 7, S values are that 1, N values are 2, thus
The stator detection number of teeth of second rotary transformer is 32, and rotor with salient pole number is 24.
Fig. 5 a are the schematic cross-section of the rotor of the first rotary transformer in the present embodiment；Fig. 5 b are the in the present embodiment
The schematic cross-section of the rotor of two rotary transformers.In first rotary transformer and the second rotary transformer, stator includes
Stator core, rotor includes rotor core, and stator core and rotor core are stamped and formed out using silicon steel sheet.First rotation becomes
32 stators detection tooth of depressor and the second rotary transformer is uniformly distributed along the stator core inner surface at place, the second rotation
24 rotor with salient pole of transformer are uniformly distributed on the excircle of the rotor core at place.
For the first rotary transformer, 32 stators detection teeth circumferentially clockwise distribution be followed successively by 3101A, 3102A,
3103A、3104A、3105A、3106A、3107A、3108A、3109A、3110A、3111A、3112A、3113A、3114A、
3115A、3116A、3117A、3118A、3119A、3120A、3121A、3122A、3123A、3124A、3125A、3126A、
3127A、3128A、3129A、3130A、3131A、3132A.For accompanying drawing for purpose of brevity, and because stator detects the distribution of tooth
It is regular with reference, therefore does not mark each stator to detect the reference of tooth one by one in fig 5 a, only provides several
Example.In the present embodiment, selection is only each around 1 coil on stator detection tooth 3101A, 3109A, 3117A and 3125A.Each line
The inductance of circle changes with the change of the anglec of rotation of rotor.In the present embodiment, the shape of rotor with salient pole is selected by Electromagnetic Simulation
Shape so that the changing unit of the inductance of coil is in sinusoidal variations with the anglec of rotation of rotor.
In first rotary transformer of the present embodiment, stator coil is divided into 4 groups.Every group of stator coil includes 1 coil；
The DC component of the inductance of each coil is equal, and the fundamental voltage amplitude of the inductance of each coil is equal.The synthesis of each group stator coil
The phase of inductance differs 90 degree successively.Four groups of stator coils constitute bridge circuit, the bridge circuit and the second rotation in the present embodiment
The circuit diagram after the connection of bridge circuit figure in transformation depressor can refer in Fig. 2 in first embodiment, the present embodiment this first
The circuit diagram of bridge circuit in rotary transformer can refer to the part close to left side in Fig. 2, be the bridge of now bridge circuit
Arm XAC1Detect that the coil on tooth 3101A is constituted by stator, bridge arm XAD1Detect that the coil on tooth 3109A is constituted by stator, bridge arm
XBC1Detect that the coil on tooth 3117A is constituted by stator, bridge arm XBD1Detect that the coil on tooth 3125A is constituted by stator.Bridge-type electricity
4 contacts A1, B1, C1, the D1 on road respectively with 4 leads draw as the lead-out wire 801A of the first rotary transformer, 802A,
803A and 804A, wherein lead-out wire 801A and 802A are the excitation wire of the first rotary transformer, and it is connected to rotary transformer system
In the excitation wire of system, lead-out wire 803A and 804A is drawn as the first signals of rotating transformer line of Rotary transformer system.
For the second rotary transformer, 32 stators detection teeth circumferentially clockwise distribution be followed successively by 3101B, 3102B,
3103B、3104B、3105B、3106B、3107B、3108B、3109B、3110B、3111B、3112B、3113B、3114B、
3115B、3116B、3117B、3118B、3119B、3120B、3121B、3122B、3123B、3124B、3125B、3126B、
3127B、3128B、3129B、3130B、3131B、3132B.For accompanying drawing for purpose of brevity, and because stator detects the distribution of tooth
It is regular with reference, therefore does not mark each stator to detect the reference of tooth one by one in figure 5b, only provides several
Example.In the present embodiment, only stator detection tooth 3101B, 3102B, 3103B, 3104B, 3109B, 3110B, 3111B,
Coil is wound with 3112B, 3117B, 3118B, 3119B, 3120B, 3125B, 3126B, 3127B, 3128B.The inductance of each coil
Change with the change of the anglec of rotation of rotor.In the present embodiment, the shape of rotor with salient pole is selected by Electromagnetic Simulation so that line
The changing unit of the inductance of circle is in sinusoidal variations with the anglec of rotation of rotor.
In second rotary transformer of the present embodiment, stator coil is divided into 4 groups.Every group of stator coil includes 4 coils；
The DC component of the inductance of each coil is equal, and the fundamental voltage amplitude of the inductance of each coil is equal.The synthesis of each group stator coil
The phase of inductance differs 90 degree successively.Four groups of stator coils constitute bridge circuit, and the circuit diagram of the bridge circuit can refer in Fig. 2
Part close to right side, is the bridge arm X of now bridge circuitAC2On stator detection tooth 3101B, 3109B, 3117B, 3125B
Coil it is in series, bridge arm XAD2Detect that the coil on tooth 3102B, 3110B, 3118B, 3126B is in series by stator, bridge
Arm XBC2Detect that the coil on tooth 3103B, 3111B, 3119B, 3127B is in series by stator, bridge arm XBD2Tooth is detected by stator
3104th, the coil on 3112,3120,3128 is in series.The fundamental phase of each inductance in same bridge arm is equal, bridge circuit
4 contacts A2, B2, C2, D2 respectively with 4 leads draw as rotary transformer lead-out wire 801B, 802B, 803B and
804B, wherein lead-out wire 801B and 802B are connected to the excitation wire of Rotary transformer system for the excitation wire of the second rotary transformer
On, lead-out wire 803B and 804B draw for the second signals of rotating transformer line of Rotary transformer system.
The present embodiment includes the structure of the Rotary transformer system of the first rotary transformer and the second rotary transformer
Schematic diagram can borrow accompanying drawing Fig. 3 in first embodiment.
Based on such arrangement, the computational methods in first embodiment are readily obtained the first rotary transformer jackshaft
The contact C1 and contact D1 of formula circuit output voltage are the anglec of rotation θ on rotor in the present embodiment that phase differs 90 degree
m3Respectively into sinusoidal variations and into the voltage signal of varies with cosine, this as asks for the anglec of rotation institute of rotor in the prior art
The basis signal needed, therefore these basis signals are sent to the signal processing circuit subsequently connected or pass through simple computation i.e.
It can obtain the anglec of rotation θ m of rotor3.And it can see rotor and often rotate 1 week inductance 1 cycle of change, it is known that be above-mentioned to try to achieve
Angle, θ m3It is monodrome in 0-360 degree interval, it is possible thereby to the absolute rotation angle for detecting rotor.
Equally, based on such arrangement, the computational methods in first embodiment are readily obtained the second rotary transformer
The contact C2 and contact D2 output voltage of bridge circuit be that phase differs 90 degree of the rotation on rotor in the present embodiment
Angle, θ m3Respectively into sinusoidal variations and into the voltage signal of varies with cosine, this as asks for the rotation of rotor in the prior art
Basis signal needed for angle, therefore these basis signals are sent to the signal processing circuit subsequently connected or pass through simple
Calculate the anglec of rotation θ m that can obtain rotor3.As can be seen here in the present embodiment in the second rotary transformer, rotor often rotates 1
Week, the inductance of coil changes 24 cycles, i.e. 15 degree of position signallings of every turn of rotor change 1 cycle, thus becomes with the first rotation
The result of depressor is combined can be interval for subdivision test, greatly improves accuracy of detection.
In above example, cause the changing unit of inductance of coil with rotor to the setting of the shape of rotor with salient pole
The anglec of rotation is in sinusoidal variations, in the utility model, can also set the shape of rotor with salient pole to cause the inductance of coil
Changing unit changes with the anglec of rotation of rotor in triangular wave.
In above three embodiment, due to differing greatly as stator detection tooth, rotor with salient pole and determining between each embodiment
The distribution of subsolution coupling tooth, is more or less the same on system construction, therefore the reference of stator detection tooth gives between each embodiment
Distinguish, remaining corresponding component uses identical reference.
In above-described embodiment, rotor is arranged in the inside of stator；In the utility model, rotor can also be arranged in fixed
The outside of son.
The utility model also proposed a kind of rotary body with above-mentioned Rotary transformer system.The rotary body includes rotation
Body body and above-mentioned Rotary transformer system.Wherein, the anglec of rotation of Rotary transformer system and the anglec of rotation of rotary body body
The relation of rule is spent into, the anglec of rotation of rotary body body is obtained therefore, it is possible to the angle that is detected by Rotary transformer system.
Fourth embodiment：
In fourth embodiment, rotary body body be motor, Rotary transformer system using including two rotary transformers as
Example.Fig. 6 show the structural representation of rotary body in the present embodiment.In Fig. 6,401 represent Rotary transformer system and motor
Shared casing, 4021 represent the stator of the first rotary transformer of Rotary transformer system, and 4022 represent rotary transformer system
The stator of second rotary transformer of system；403 represent the stator of motor；4041 represent the first rotation of Rotary transformer system
The rotor core of transformer, 4042 represent the rotor core of the second rotary transformer of Rotary transformer system, and 405 represent electronic
The rotor core of machine, the rotor core 4041 of the first rotary transformer, the rotor core 4042 of the second rotary transformer with it is electronic
The rotor core 405 of machine is rotated together with, and 406 represent rotating shaft, and 4071,4072 represent front and rear cover respectively, and 408 represent bearing, protect
The smooth rotation of rotor relative stator is demonstrate,proved, 4091,4092,4093,4094,4095,4096 represent the extraction of Rotary transformer systems
Line, 4091 and 4092 be the first rotary transformer and the shared excitation wire of the second rotary transformer, and 4093,4094 be the first rotation
Independent signal wire, 4095 and 4096 of transformer are the independent signal wire of the second rotary transformer, and 4010 represent motor
Lead, 40111 represent the first rotary transformers coil, 40112 represent the second rotary transformers coil, 4012 represent electricity
Motivation coil.In the present embodiment, rotary body is the integral motor that Rotary transformer system is integrally formed with motor body.
5th embodiment：
In 5th embodiment, rotary body body be motor, Rotary transformer system using including two rotary transformers as
Example.Fig. 7 show the structural representation of rotary body in the present embodiment.In Fig. 7,501 represent Rotary transformer system, and 502 represent
Motor, 503 represent motor rotary shaft, and 5041 and 5042 represent drawing for the first rotary transformer of Rotary transformer system respectively
The lead-out wire group of outlet group and the second rotary transformer, 505 represent motor lead line, and 506 be screw.In the present embodiment, rotation
Voltage transformer system 501 is arranged on the end of motor body 502, and the rotating shaft of motor rotary shaft 503 and Rotary transformer system is used
Shaft coupling connection synchronous rotary (not shown in Fig. 7).As can be seen here, in the present embodiment, rotary body be Rotary transformer system with
The split-type structural that motor body is constituted.
The utility model Rotary transformer system and rotary body with this Rotary transformer system use at least two
Rotary transformer, especially magnetoresistance transformer, the 0- that the angle that a rotary transformer detection is obtained is rotated in rotor
It is monodrome that 360 degree are interval, another or multiple rotary transformers in the 0-360 degree that rotor is rotated is interval progress 2 or 2 with
On detect periodically, being combined with the result of previous rotary transformer can be interval for subdivision test, so as to substantially increase
Accuracy of detection.Meanwhile, the utility model can enormously simplify production work on each stator detection tooth at most around a coil
Skill, effectively prevent because the position of winding is different so that the uniformity of rotary transformer is adversely affected, and is overcome existing
There are the short-circuit risks on same stator tooth between different windings in technology.In addition, stator decoupling tooth also can be set in the utility model, have
The magnetic coupling interference between the different stator detection teeth for being wound with coil has been reduced or eliminated in effect, so as to further increase this reality
With new reliability.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using this reality
With new.Person skilled in the art obviously can easily make various modifications to these embodiments, and saying herein
Bright General Principle is applied in other embodiment without passing through performing creative labour.Therefore, the utility model is not limited to this
In embodiment, those skilled in the art disclose according to of the present utility model, and do not depart from that the utility model category made changes
Entering and change all should be within protection domain of the present utility model.
Claims (27)
1. a kind of Rotary transformer system, it is characterised in that：Including at least two rotary transformers；Each rotary transformer
Include stator and rotor, stator includes stator and detects tooth, and rotor includes rotor with salient pole；
Each rotary transformer includes the multiple coils being wound on the stator detection tooth, the inductance of each coil with
The change of the anglec of rotation of corresponding rotor and change, the rotation of the rotor is detected with the change of the inductance according to the coil
Gyration；
At least two rotary transformer at least includes the first rotary transformer and the second rotary transformer；
The rotor of first rotary transformer includes and only includes 1 rotor with salient pole；
The rotor of second rotary transformer includes the rotor with salient pole of 2 or more than 2；
The rotor of at least rotor of the first rotary transformer and the second rotary transformer is set to synchronous axial system.
2. Rotary transformer system according to claim 1, it is characterised in that：First rotary transformer and the second rotation become
It is satisfied by depressor：Including at least four groups stator coils, every group of stator coil includes at least one described coil；It is all described
Coil connects and composes bridge circuit, and every group of stator coil constitutes a bridge arm of the bridge circuit.
3. Rotary transformer system according to claim 2, it is characterised in that：In the bridge circuit, each two intersects
Bridge arm intersection constitute a contact, from each junction draw a lead-out wire, be used as the excitation of the bridge circuit
Line or signal wire；The bridge circuit both has excitation wire, it may have signal wire.
4. Rotary transformer system according to claim 2, it is characterised in that：In each rotary transformer：Each group
The quantity of the stator coil interior loop is identical with distribution；The phase of the combination inductance of stator coil described in each group differs 90 successively
Degree.
5. Rotary transformer system according to claim 2, it is characterised in that：In each rotary transformer：Each institute
The DC component for stating the inductance of coil is equal, and the fundamental voltage amplitude of each coil is equal.
6. Rotary transformer system according to claim 2, it is characterised in that：Each rotary transformer includes four
Group stator coil, constitutes the bridge circuit of four bridge legs, and with four contacts, four lead-out wires are drawn from four junctions,
Wherein two lead-out wires are excitation wire, and two lead-out wires are signal wire in addition.
7. Rotary transformer system according to claim 6, it is characterised in that：The excitation wire of each rotary transformer
Two public excitation wires of the Rotary transformer system are all connected to, each rotary transformer has independent two
Signal wire；Or, each rotary transformer has two independent excitation wires and two independent signal wires.
8. Rotary transformer system according to claim 1, it is characterised in that：The stator detection tooth of first rotary transformer
Number is 4* (M+1), and M is positive integer.
9. Rotary transformer system according to claim 8, it is characterised in that：First rotary transformer includes four groups altogether to be determined
Subcoil；Every group of stator coil includes at least one coil；Each coil is wound on a stator detection tooth, each group
The quantity of the stator coil coil is identical with distribution；The DC component of the inductance of each coil is equal, the electricity of each coil
The fundamental voltage amplitude of sense is equal；In four groups of stator coils, the phase of the combination inductance of each group stator coil differs first angle successively；
Four groups of stator coils constitute bridge circuit；Four contacts of the bridge circuit draw four lead-out wires；Described four are drawn
In outlet, two lead-out wires are excitation wire, and are connected with the excitation wire of the Rotary transformer system, and two lead-out wires are in addition
Signal lead-out wire；First angle is setting value.
10. Rotary transformer system according to claim 9, it is characterised in that：First angle is 90 degree.
11. Rotary transformer system according to claim 1, it is characterised in that：The stator detection of second rotary transformer
The number of teeth is 4* (K+1) * S, and rotor with salient pole number is (K+1) * (2N-1) * S；Wherein, K, S and N are positive integer.
12. Rotary transformer system according to claim 11, it is characterised in that：Second rotary transformer includes four groups altogether
Stator coil；Every group of stator coil includes at least one coil；Each coil is wound on a stator detection tooth, respectively
The quantity of the group stator coil coil is identical with distribution；The DC component of the inductance of each coil is equal, each coil
The fundamental voltage amplitude of inductance is equal；In four groups of stator coils, the phase of the combination inductance of each group stator coil differs second jiao successively
Degree；
Four groups of stator coils constitute bridge circuit；Four contacts of the bridge circuit draw four lead-out wires；Described four are drawn
In outlet, two lead-out wires are excitation wire, and are connected with the excitation wire of the Rotary transformer system, and two lead-out wires are in addition
Signal lead-out wire；Second angle is setting value.
13. Rotary transformer system according to claim 12, it is characterised in that：Second angle is 90 degree.
14. Rotary transformer system according to claim 1, it is characterised in that：The stator also includes stator and decouples tooth；
The both sides of each stator detection tooth for being wound with coil are respectively provided with least one described stator decoupling tooth, different to reduce or eliminate
It is wound with the magnetic coupling interference between the stator of coil detection tooth.
15. Rotary transformer system according to claim 14, it is characterised in that：The material of the stator decoupling tooth and institute
State stator detection tooth identical with the material of stator body.
16. Rotary transformer system according to claim 15, it is characterised in that：The material is permeability magnetic material.
17. Rotary transformer system according to claim 5, it is characterised in that：In first rotary transformer, stator detection
The number of teeth is 4, and the stator decoupling number of teeth is 4.
18. Rotary transformer system according to claim 14, it is characterised in that：In second rotary transformer, stator inspection
The survey number of teeth is 4*P, and rotor with salient pole number is Q；Wherein, P and Q is positive integer, and Q/P is not equal to even number, and when P is equal to 3*R
And R be positive integer when, Q is not equal to 2*R positive integer times.
19. Rotary transformer system according to claim 11, it is characterised in that：The stator detection of second rotary transformer
The number of teeth is 8, and rotor with salient pole number is 2* (2N-1)；
Or, the stator detection number of teeth of the second rotary transformer is 12, and rotor with salient pole number is 3* (2N-1)；
Or, the stator detection number of teeth of the second rotary transformer is 16, and rotor with salient pole number is 4* (2N-1)；
Or, the stator detection number of teeth of the second rotary transformer is 20, and rotor with salient pole number is 5* (2N-1)；
Or, the stator detection number of teeth of the second rotary transformer is 24, and rotor with salient pole number is 6* (2N-1)；
Or, the stator detection number of teeth of the second rotary transformer is 28, and rotor with salient pole number is 7* (2N-1)；
Or, the stator detection number of teeth of the second rotary transformer is 32, and rotor with salient pole number is 8* (2N-1).
20. the Rotary transformer system according to any one of claim 1-19, it is characterised in that：In the rotation transformation
In device, the shape of the rotor with salient pole is set, with cause each coil inductance changing unit with the rotor
The sine wave type that is changing into of the anglec of rotation changes；
Or, in the rotary transformer, the shape of the rotor with salient pole is set, to cause the inductance of each coil
Changing unit is changing into the change of triangle waves with the anglec of rotation of the rotor.
21. the Rotary transformer system according to any one of claim 1-19, it is characterised in that：The rotary transformer
System has stator cage, end cap, bearing and rotating shaft；
The stator of each rotary transformer includes stator core, and the stator core is arranged on the stator cage
On；
The rotor of each rotary transformer includes rotor core, and the rotor core is arranged in the rotating shaft, with
The rotating shaft is rotated together with.
22. the Rotary transformer system according to any one of claim 1-19, it is characterised in that：Become in each rotation
In depressor, the rotor is arranged in the inside of the stator；
Or, in each rotary transformer, the rotor is arranged in the outside of the stator.
23. a kind of rotary body of the Rotary transformer system with any one of claim 1-22, it is characterised in that：Institute
Stating rotary body includes rotary body body and the Rotary transformer system；
The anglec of rotation of the Rotary transformer system and the anglec of rotation of the rotary body body are into regular relation, with by institute
State the anglec of rotation that Rotary transformer system detects the rotary body.
24. rotary body according to claim 23, it is characterised in that：Each rotor core peace of the Rotary transformer system
In the rotating shaft of the rotary body body, with the rotary body body synchronous axial system and formed integral structure, to detect
State the anglec of rotation of rotary body body；
Each stator of the Rotary transformer system is arranged on the casing shared with the rotary body body.
25. rotary body according to claim 24, it is characterised in that：The Rotary transformer system is fixed on the rotation
The end of body body；The rotating shaft of the Rotary transformer system is connected to cause the rotation with the rotating shaft of the rotary body body
Voltage transformer system and the rotary body body are rotated coaxially.
26. rotary body according to claim 25, it is characterised in that：The rotating shaft of the Rotary transformer system and the rotation
The rotating shaft of swivel body is connected by shaft coupling.
27. the rotary body according to any one of claim 23-26, it is characterised in that：The rotary body body is electronic
Machine.
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| CN201720061016.2U CN206556672U (en) | 2017-01-17 | 2017-01-17 | A kind of Rotary transformer system and the rotary body with this Rotary transformer system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106767954A (en) * | 2017-01-17 | 2017-05-31 | 上海世昱电子技术有限公司 | A kind of Rotary transformer system and the rotary body with this Rotary transformer system |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106767954A (en) * | 2017-01-17 | 2017-05-31 | 上海世昱电子技术有限公司 | A kind of Rotary transformer system and the rotary body with this Rotary transformer system |
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