CN106712428A - Rotary transformer and rotation body with same - Google Patents
Rotary transformer and rotation body with same Download PDFInfo
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- CN106712428A CN106712428A CN201710030638.3A CN201710030638A CN106712428A CN 106712428 A CN106712428 A CN 106712428A CN 201710030638 A CN201710030638 A CN 201710030638A CN 106712428 A CN106712428 A CN 106712428A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K24/00—Machines adapted for the instantaneous transmission or reception of the angular displacement of rotating parts, e.g. synchro, selsyn
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The present invention provides a rotary transformer and a rotation body with the same and belongs to the detection technical field. The rotary transformer comprises a stator and a rotor, wherein the stator is provided with stator detection teeth, and the rotor is provided with salient poles; the rotary transformer comprises at least two sets of detection coil systems; each set of detection coil system includes a plurality of coils wound on the stator detection teeth; inductance on the coils changes with the rotation angle of the rotor, so that the rotation angle of the rotor can be detected according to the change of the inductance of the coils; and the at least two sets of detection coil systems are arranged on the same stator. The rotation body includes a rotation main body and the above rotary transformer; and the rotation angle of the rotary transformer is in regular relation with the rotation angle of the rotation main body. According to the rotary transformer and the rotation body with the same of the invention, the at least two sets of detection coil systems can be arranged on one rotary transformer, and therefore, restriction between detection occupancy size and the reliability of detection results can be alleviated, and the reliability of the detection results can be improved, and the occupancy size can be greatly decreased.
Description
Technical field
The invention belongs to detection technique field, it is related to a kind of transformer and rotary body, especially rotary transformer and rotation
Body.
Background technology
The industries such as electric automobile, industrial automation, robot, textile machine and Aero-Space be unable to do without electric rotating machine
High performance control, so that motor angular sensor, and often requires that and is applied in high temperature environments.
Currently, photo-electric angle encoder has obtained extensively should because it can easily realize the detection of the motor anglec of rotation
With, but this photo-electric angle encoder contains photoelectric component and semiconductor devices, thus cannot apply in hot environment.
Rotary transformer is a kind of sensor that can realize anglec of rotation detection, because it does not use 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, make system because the reasons such as vibratory impulse are possible to the problems such as short circuit in winding or open circuit occur in use
Failure, system reliability is not high.In order to overcome this defect, occur in that in the prior art and two rotary transformers are arranged on same
On rotary body, when the coil of one of which rotary transformer breaks down failure, signal circuit is switched to and another group of rotation
Transformer Winding is connected, and is worked with the angle measurement for continuing to complete rotary body.But in this method, since it is desired that in rotary body
Upper to install two sets or cover rotary transformer more, it will to increase rotary body axial length, volume becomes big, and cost is greatly increased.By
This is visible, and the mutual restriction existed in the prior art between the occupancy volume of rotary transformer detecting system and reliability is asked
Topic.
The content of the invention
It is an object of the invention to provide one kind on the basis of testing result reliability is ensured, can effectively realize being used for
The compactedness of the rotary transformer detecting system of detection, i.e., testing result can under rotary transformer detecting system takes volume on an equal basis
It is higher by property and rotary transformer detecting system takes the smaller rotary transformer and tool of volume under equal testing result reliability
There is the rotary body of this rotary transformer.
In order to achieve the above object, solution of the invention is：
A kind of rotary transformer, including stator and rotor；There is the stator stator to detect tooth, and the rotor has rotor
Salient pole；The rotary transformer includes at least two sets detection coil systems；The detection coil system is often covered to be wound on including multiple
Coil on the stator detection tooth, the inductance of the coil changes with the change of the anglec of rotation of the rotor, with basis
The anglec of rotation of the change detection rotor of the inductance of the coil；At least two sets detection coil systems are arranged on same
On individual stator.
Often cover in the detection coil system, multiple coils constitute bridge circuit, each bridge arm of the bridge circuit
It is made up of a coil or in series by multiple coils, is drawn from the intersecting junction of the bridge arm of the bridge circuit
Go out lead-out wire, as excitation wire or holding wire.
The stator detection number of teeth is 4* (S+1), and rotor with salient pole number is K, and wherein S and K is positive integer, and K/ (S+1) is not equal to
Even number；And when (S+1) is equal to 3*R and R is positive integer, K is not equal to the positive integer times of 2*R.
Most coils are set on each stator detection tooth.
In often covering the detection coil system：Including at least four groups stator coils, every group of stator coil includes at least one
Coil, the coil is wound on the stator detection tooth；Stator coil composition bridge circuit, every group of stator coil described in all groups
Constitute a bridge arm of the bridge circuit；In the bridge circuit, the intersecting bridge arm of each two constitutes one and connects in intersection
Point, a lead-out wire is drawn from junction each described；Preferably, in often covering the detection coil system：Stator described in each group
The quantity of coil interior loop is identical with distribution；The phase of the combination inductance of stator coil described in each group differs 90 degree successively；It is preferred that
Ground, in often covering the detection coil system：The DC component of the inductance of each coil is equal, the fundamental voltage amplitude of each coil
It is equal；Preferably, often set detection coil system 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, are drawn described in two in addition
Outlet is holding wire.
The stator also includes that stator decouples tooth, is provided with least in each both sides for being wound with the stator detection tooth of coil
One stator decoupling tooth, is disturbed with the magnetic coupling being reduced or eliminated between the different stator detection tooth for being wound with coil；It is excellent
Selection of land, the material of the stator decoupling tooth and the material of stator detection tooth and stator body are consistent；It is further preferred that institute
Material is stated for permeability magnetic material.
The stator detection number of teeth is 8, and the rotor with salient pole number is K, and K is not equal to 4 integral multiple；Preferably, institute
It is 10 to state rotor with salient pole number；Or, the stator detection number of teeth is 12, and the rotor with salient pole number is K, and K be not equal to 2 it is whole
Several times；Preferably, the rotor with salient pole number is 9；Or, the stator detection number of teeth is 16, and the rotor with salient pole number is K, and
And K is not equal to 8 integral multiple；Or, the stator detection number of teeth is 20, and the rotor with salient pole number is K, and K is not equal to 10
Integral multiple；Or, the stator detection number of teeth is 24, and the rotor with salient pole number is K, and K is not equal to 4 integral multiple；Or
Person, the stator detection number of teeth is 28, and the rotor with salient pole number is K, and K is not equal to 14 integral multiple；Or, the stator
The detection number of teeth is 32, and the rotor with salient pole number is K, and K is not equal to 16 integral multiple.
The stator detection number of teeth is 8, and being respectively provided with least one in each both sides for being wound with the stator detection tooth of coil determines
Subsolution coupling tooth, the rotor with salient pole number is K, and K is not equal to 4 integral multiple；Preferably, the rotor with salient pole number is 10, fixed
The subsolution coupling number of teeth is 8；Or, the stator detection number of teeth is 12, is all provided with each both sides for being wound with the stator detection tooth of coil
Stator decoupling tooth described at least one is put, the rotor with salient pole number is K, and K is not equal to 2 multiple；Or, the stator inspection
It is 16 to survey the number of teeth, and stator decoupling tooth described at least one is respectively provided with each both sides for being wound with the stator detection tooth of coil, described
Rotor with salient pole number is K, and K is not equal to 8 integral multiple；Or, the stator detection number of teeth is 20, and coil is wound with each
The both sides of stator detection tooth are respectively provided with stator decoupling tooth described at least one, and the rotor with salient pole number is K, and K is not equal to 10
Integral multiple；Or, the stator detection number of teeth is 24, is respectively provided with least in each both sides for being wound with the stator detection tooth of coil
One stator decoupling tooth, the rotor with salient pole number is K, and K is not equal to 4 multiple；Or, the stator detects the number of teeth
It is 28, stator decoupling tooth described at least one is respectively provided with each both sides for being wound with the stator detection tooth of coil, the rotor is convex
Number of poles is K, and K is not equal to 14 integral multiple；Or, the stator detection number of teeth is 32, and the stator of coil is wound with each
Detect that the both sides of tooth are respectively provided with described at least one stator decoupling tooth, the rotor with salient pole number is K, and K be not equal to 16 it is whole
Several times.
The rotary transformer has stator cage, end cap, bearing and rotating shaft；The stator includes stator core, described
Stator core is arranged on the stator cage；The rotor includes rotor core, and the rotor core is arranged on the rotating shaft
On, rotated together with the rotating shaft.
The rotor is arranged in the inside of the stator；Or, the rotor is arranged in the outside of the stator.
A kind of rotary body with above-mentioned rotary transformer, the rotary body includes rotary body body and the rotation transformation
Device；The anglec of rotation of the anglec of rotation of the rotary transformer and the rotary body body into rule relation, with by described
Rotary transformer detects the anglec of rotation of the rotary body.
The rotor core of the rotary transformer is arranged in the rotating shaft of the rotary body body, with the rotary body body
Synchronous axial system and formation integral structure, to detect the anglec of rotation of the rotary body body；The stator of the rotary transformer
On the stator cage shared with the rotary body body.
Or, the rotary transformer is fixed on the end of the rotary body body；The rotating shaft of the rotary transformer with
The rotating shaft connection of the rotary body body is with so that the rotary transformer and the rotary body body are rotated coaxially；Preferably,
The rotating shaft of the rotary transformer 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 invention are as follows：Rotary transformer of the present invention and with it is this rotation become
The rotary body of depressor sets two sets or more than two sets of detection coil system on the same stator of rotary transformer, is using
During, one or more sets detection coil systems as back-up system can be occurred in currently used detection coil system
During failure, it is switched to another set of detection coil system and works on, substantially increases the reliability of anglec of rotation detection；Can also
Make two sets or cover the detection coil system operation detection anglec of rotation simultaneously more, testing result is compared, it is also possible to greatly improve
The reliability of testing result.As can be seen here, the present invention can set two sets or more than two sets of detection on a rotary transformer
Coil system, compared to many Rotary transformer systems in the prior art with equal reliability, the rotation transformation of required setting
Device quantity is few, and shared volume is few, and cost is substantially reduced；Compared to setting equal number rotary transformer in the prior art
Many Rotary transformer systems, when occupancy volume is identical, reliability is then greatly improved.
Meanwhile, the present invention can be realized on each stator detection tooth at most around 1 coil, enormously simplify production work
Skill, effectively prevent because the position of winding is different so that the uniformity of rotary transformer is adversely affected, and overcomes existing
There are the short-circuit risks on same stator tooth between different windings in technology；Additionally, the present invention can also be wound with the different of coil
Stator decoupling tooth is set between stator detection tooth, and the magnetic coupling being effectively reduced or eliminated between different stator detection teeth is done
Disturb.
Brief description of the drawings
Fig. 1 is the schematic cross-section of the rotor of rotary transformer in first embodiment of the invention；
Fig. 2 is the structural representation of rotary transformer in first embodiment of the invention；
After Fig. 3 is for the first bridge circuit, the second bridge circuit and the 3rd bridge circuit connection in first embodiment of the invention
Circuit diagram；
Fig. 4 is the schematic cross-section of the rotor of rotary transformer in second embodiment of the invention；
Fig. 5 is the circuit diagram after the first bridge circuit in second embodiment of the invention and the connection of the second bridge circuit；
Fig. 6 is the structural representation of the rotary body with rotary transformer in third embodiment of the invention；
Fig. 7 is the structural representation of the rotary body with rotary transformer in fourth embodiment of the invention.
In accompanying drawing：1101~1112, stator detection tooth；2nd, stator；3rd, rotor；4th, rotating shaft；5th, bearing；6th, stator cage；
701~702, end cap；801st, first group of lead-out wire；802nd, second group of lead-out wire；803rd, the 3rd group of lead-out wire；9th, coil；10th, it is fixed
Subsolution coupling tooth；2101~2108, stator detection tooth；301st, rotary transformer and the shared casing of motor；302nd, transformation is rotated
The stator of device；303rd, the stator of motor；304th, the rotor core of rotary transformer；305th, the rotor core of motor；306、
Rotating shaft；3071~3072, end cap；308th, bearing；3091st, first group of lead-out wire of rotary transformer；3092nd, rotary transformer
Second group of lead-out wire；3010th, the lead of motor；3011st, rotary transformer coil；3012nd, motor winding；401st, rotation becomes
Depressor；402nd, motor；403rd, motor rotary shaft；4041st, first group of lead-out wire of rotary transformer；4042nd, rotary transformer
Second group of lead-out wire；405th, motor lead line；406th, screw.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings.
The present invention proposes a kind of rotary transformer, the rotary transformer especially magnetoresistance transformer, including fixed
Son and rotor, stator include that stator detects tooth, and rotor includes rotor with salient pole.The rotary transformer includes at least two sets detection coils
System；Often set detection coil system includes the coils that multiple is wound on stator detection tooth, the inductance of these coils with rotor rotation
The change of gyration and change, with the inductance according to coil change detection rotor the anglec of rotation；At least two sets such inspections
Test coil system is arranged on same stator.So as to, on the stator of same rotary transformer, can exist two sets or
More set detection coil systems, these detection coil systems can work together, and it is right that the testing result for each obtaining can be carried out
Than improving the reliability of the testing result of the anglec of rotation of rotor；Can also using it is a set of or it is many set detection coil systems as
Back-up system, when the detection coil system of current operation breaks down, enables standby detection coil system, improves rotor
The reliability of the testing result of the anglec of rotation.
Often in set detection coil system, multiple coils constitute bridge circuit, and each bridge arm of bridge circuit is by a coil structure
Into or by multiple coils it is in series.In bridge circuit, the intersecting bridge arm of each two constitutes a contact in intersection, from each
Junction draws a lead-out wire, used as excitation wire or holding wire.
It is 4* (S+1) that the stator detection number of teeth can be set, and rotor with salient pole number is K, and wherein S and K is positive integer, and K/ (S+
1) it is not equal to even number；Also, when (S+1) is equal to 3*R and R is positive integer, K is not equal to the positive integer times of 2*R.
In the present invention, can realize setting most coils on each stator detection tooth.
In preferred often set detection coil system：Including at least four groups stator coils, every group of stator coil includes at least one
Individual coil, coil is wound on stator detection tooth, and at most a coil is wound with each stator detection tooth；Each group stator coil includes
The coil of equal number, the distribution of each group stator coil coil is identical；Often cover the inductance of each coil in detection coil system
DC component is equal, and the fundamental voltage amplitude of the inductance of each coil is equal；The phase of the combination inductance of each group stator coil is differed successively
90 degree；All groups of stator coils constitute bridge circuit, and every group of stator coil constitutes a bridge arm of the bridge circuit；Bridge circuit
In, the intersecting bridge arm of each two constitutes a contact in intersection, and a lead-out wire is drawn from each junction.Preferably, often
Set detection coil system includes four groups of stator coils, the bridge circuit of four bridge legs is constituted, with four contacts, so as to draw four altogether
Root lead-out wire.In four lead-out wires, two lead-out wires are excitation wire, and two lead-out wires are holding wire in addition.
In the present invention, stator includes stator core, coil, lead-out wire and insulator (in particular insulation framework) etc..Stator
Iron 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, line
Insulator is provided between circle and stator core, the insulator is insulation framework or the material for playing insulating effect.Rotor include with
The rotor core that rotor coaxial is rotated.Rotor core is made up of permeability magnetic material, and rotor core excircle is in salient pole shape, thus rotor
Including rotor with salient pole.
Preferably, stator also includes that stator decouples tooth, is provided with each both sides for being wound with the stator detection tooth of coil
At least one stator decouples tooth, is disturbed with the magnetic coupling being reduced or eliminated between the different stator detection tooth for being wound with coil.It is fixed
The material of subsolution coupling tooth is consistent with the material of stator detection tooth and stator body, and the material is permeability magnetic material.
In rotary transformer of the present invention, may be selected to set the stator detection number of teeth is 8, and rotor with salient pole number is K, and K is not
Integral multiple equal to 4, or can be respectively provided with the decoupling of at least one stator in the both sides of each stator detection tooth for being wound with coil simultaneously
Tooth；May be selected to set the stator detection number of teeth is 12, and rotor with salient pole number is K, and K is not equal to 2 integral multiple, or simultaneously can be every
The both sides of the individual stator detection tooth for being wound with coil are respectively provided with least one stator decoupling tooth；May be selected to set the stator detection number of teeth and be
16, rotor with salient pole number is K, and K is not equal to 8 integral multiple, or can detect the two of tooth in each stator for being wound with coil simultaneously
Side is respectively provided with least one stator decoupling tooth；May be selected to set the stator detection number of teeth is 20, and rotor with salient pole number is K, and K
In 10 integral multiple, or the decoupling of at least one stator can be respectively provided with the both sides of each stator detection tooth for being wound with coil simultaneously
Tooth；May be selected to set the stator detection number of teeth is 24, and rotor with salient pole number is K, and K is not equal to 4 integral multiple, or simultaneously can be every
The both sides of the individual stator detection tooth for being wound with coil are respectively provided with least one stator decoupling tooth；May be selected to set the stator detection number of teeth and be
28, rotor with salient pole number is K, and K is not equal to 14 integral multiple, or can detect the two of tooth in each stator for being wound with coil simultaneously
Side is respectively provided with least one stator decoupling tooth；May be selected to set the stator detection number of teeth is 32, and rotor with salient pole number is K, and K
In 16 integral multiple, or the decoupling of at least one stator can be respectively provided with the both sides of each stator detection tooth for being wound with coil simultaneously
Tooth.
First embodiment：
In first embodiment, S values are that 2, K values are 9, so that the rotary transformer has 12 stator detections tooth and 9
Individual rotor with salient pole.Fig. 1 show the schematic cross-section of the rotor of the rotary transformer in the present embodiment.Stator core and rotor
Iron core is stamped and formed out using silicon steel sheet.In the present embodiment, 12 stator detection teeth are uniformly distributed along stator core inner surface；9
Individual rotor with salient pole is uniformly distributed along the outer round surface of rotor core.
There is Insulated winding wire skeleton (not shown in figure 1) on each stator detection tooth.It is wound with and only on each stator detection tooth
1 coil is full of, 12 coils are had circumferentially on 12 stator detection teeth, 12 stator detection teeth are circumferentially clockwise
Distribution is followed successively by 1101,1102,1103,1104,1105,1106,1107,1108,1109,1110,1111,1112.Each coil
Inductance 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 the changing unit of the inductance of coil is in sinusoidal variations with the anglec of rotation of rotor.In Fig. 1,9 represent coil.The present embodiment
In, the DC component of the inductance of each coil is equal, and the fundamental voltage amplitude of the inductance of each coil is equal.
Fig. 2 show the structural representation of the whole rotary transformer.The rotary transformer includes stator 2, rotor 3, turns
Axle 4, bearing 5, the end cap 701 and 702, bearing chamber of stator cage 6, both sides, three groups of lead-out wires 801,802,803.Rotor core
It is fixed in rotating shaft 4, can be rotated together with rotating shaft 4.Bearing 5 is arranged in rotating shaft 4, support rotor 3 smooth of bearing 5 ground
Rotate.Stator core is fixed in stator cage 6.Bearing chamber is arranged on the both sides end cap 701 and 702 of rotary transformer
On, the outer ring of bearing 5 is arranged in two bearing chambers of end cap 701 and 702, it is ensured that the center line of rotating shaft 4 and the inner circle of stator 2
Center line is consistent.First group of lead-out wire, 801, second group of lead-out wire 802 and the 3rd group of lead-out wire 803 include four lead-out wires,
Two is excitation wire in four lead-out wires, and two lead-out wires are holding wire in addition.
In the present embodiment, altogether including three detection coil systems, the first detection coil system includes being wound on stator detection tooth
1101st, the coil on 1102,1103,1104, the second detection coil system include being wound on stator detection tooth 1105,1106,1107,
Coil on 1108, the 3rd detection coil system includes the coil being wound on stator detection tooth 1109,1110,1111,1112, three
Individual detection coil system is belonging respectively to three independent rotary transformer detection coil systems, three detection coil systems group respectively
Into the first bridge circuit, the second bridge circuit and the 3rd bridge circuit, the first bridge circuit, the second bridge circuit and the 3rd bridge-type
Circuit connection after circuit diagram as shown in figure 3, in Fig. 3 near left side bridge circuit be the first bridge circuit, near in
Between bridge circuit be the second bridge circuit, near right side bridge circuit be the 3rd bridge circuit.
In Fig. 3, the bridge arm X of the first bridge circuitAC1It is made up of the coil on stator detection tooth 1101, bridge arm XAD1By stator
Coil on detection tooth 1102 is constituted, bridge arm XBC1It is made up of the coil on stator detection tooth 1103, bridge arm XBD1Detected by stator
Coil on tooth 1104 is constituted.4 connecting nodes A1, B1, C1, D1 of first bridge circuit draw conduct with 4 leads respectively
Four lead-out wires of the first Rotary transformer system including the first bridge circuit, wherein two lead-out wires are excitation wire, in addition
Two lead-out wires are holding wire.
In Fig. 3, the bridge arm X of the second bridge circuitAC2It is made up of the coil on stator detection tooth 1105, bridge arm XAD2By stator
Coil on detection tooth 1106 is constituted, bridge arm XBC2It is made up of the coil on stator detection tooth 1107, bridge arm XBD2Detected by stator
Coil on tooth 1108 is constituted.4 connecting nodes A2, B2, C2, D2 of second bridge circuit draw conduct with 4 leads respectively
Four lead-out wires of the second Rotary transformer system including the second bridge circuit, wherein two lead-out wires are excitation wire, in addition
Two lead-out wires are holding wire.
In Fig. 3, the bridge arm X of the 3rd bridge circuitAC3It is made up of the coil on stator detection tooth 1109, bridge arm XAD3By stator
Coil on detection tooth 1110 is constituted, bridge arm XBC3It is made up of the coil on stator detection tooth 1111, bridge arm XBD3Detected by stator
Coil on tooth 1112 is constituted.4 connecting nodes A3, B3, C3, D3 of 3rd bridge circuit draw conduct with 4 leads respectively
Four lead-out wires of the 3rd Rotary transformer system including the 3rd bridge circuit, wherein two lead-out wires are excitation wire, in addition
Two lead-out wires are holding wire.
In the present embodiment, the principle that sine wave position signalling is produced is as follows：
The inductance of the coil 1101,1102,1103,1104 of rotary transformer the first detection coil system is made to be respectively
L1101、L1102、L1103、L1104.As seen from Figure 1 with rotor the anglec of rotation change, each stator tooth and rotor
Gap between salient pole changes so that the inductance of each coil changes therewith, and its period of change is 9.First detection coil system
Stator detection tooth 1101,1102,1103,1104 on coil inductance with rotor anglec of rotation θ m1Change can be respectively
It is expressed as：
L1101=L1+Lm1*sin(9θm1) formula (101)
L1102=L1+Lm1*sin(9θm1+ 90) formula (102)
L1103=L1+Lm1*sin(9θm1+ 180) formula (103)
L1104=L1+Lm1*sin(9θm1+ 270) formula (104)
Wherein, L1 is the DC component of each inductance；
Lm1It is the fundamental voltage amplitude of each inductance；
θm1It is the anglec of rotation of rotor.
With reference to the first bridge circuit：
The bridge arm X being made up of the coil on stator detection tooth 1101AC1Inductance L_AC1 be：
L_AC1=L1101=L1+Lm1*sin(9θm1) formula (105)
The bridge arm X being made up of the coil on stator detection tooth 1102AD1Inductance L_AD1 be：
L_AD1=L1102=L1+Lm1*sin(9θm1+ 90) formula (106)
The bridge arm X being made up of the coil on stator detection tooth 1103BC1Inductance L_BC1 be：
L_BC1=L1103=L1+Lm1*sin(9θm1+ 180) formula (107)
The bridge arm X being made up of the coil on stator detection tooth 1104BD1Inductance L_BD1 be：
L_BD1=L1104=L1+Lm1*sin(9θm1+ 270) formula (108)
From formula (101)-formula (108), the fundametal compoment of four inductance of bridge arm of the first bridge circuit is phase successively
90 degree of sine wave is differed from, is easy to obtain the output voltage of the contact C1 and contact D1 of bridge circuit by the simple computation of circuit
It is the anglec of rotation θ m of the rotor of 90 degree of phase difference1Sinusoidal signal, the anglec of rotation θ m on rotor can be accessed1Respectively
Into sinusoidal variations and the voltage signal of varies with cosine, this basis letter needed for as asking for the anglec of rotation of rotor in the prior art
Number, therefore send these basis signals to the follow-up signal processing circuit for connecting or can obtain rotor by simple computation
Anglec of rotation θ m1。
The coil for making the stator of rotary transformer the second detection coil system detect on tooth 1105,1106,1107,1108
Inductance is respectively L1105, L1106, L1107, L1108.As seen from Figure 1 with rotor the anglec of rotation change, it is each fixed
Gap between sub- tooth and rotor with salient pole changes so that the inductance of each coil changes therewith, and its period of change is 9.Second inspection
The stator of test coil system detects the inductance of the coil on tooth 1105,1106,1107,1108 with the anglec of rotation θ m of rotor1Become
Change can be expressed as：
L1105=L1+Lm1*sin(9θm1) formula (109)
L1106=L1+Lm1*sin(9θm1+ 90) formula (110)
L1107=L1+Lm1*sin(9θm1+ 180) formula (111)
L1108=L1+Lm1*sin(9θm1+ 270) formula (112)
With reference to the second bridge circuit：
The bridge arm X being made up of the coil on stator detection tooth 1105AC2Inductance L_AC2 be：
L_AC2=L1105=L1+Lm1*sin(9θm1) formula (113)
The bridge arm X being made up of the coil on stator detection tooth 1106AD2Inductance L_AD2 be：
L_AD2=L1106=L1+Lm1*sin(9θm1+ 90) formula (114)
The bridge arm X being made up of the coil on stator detection tooth 1107BC2Inductance L_BC2 be：
L_BC2=L1107=L1+Lm1*sin(9θm1+ 180) formula (115)
The bridge arm X being made up of the coil on stator detection tooth 1108BD2Inductance L_BD2 be：
L_BD2=L1108=L1+Lm1*sin(9θm1+ 270) formula (116)
From formula (109)-formula (116), the fundametal compoment of four inductance of bridge arm of the second bridge circuit is phase successively
90 degree of sine wave is differed from, is easy to obtain the output voltage of the contact C2 and contact D2 of bridge circuit by the simple computation of circuit
It is the anglec of rotation θ m of the rotor of 90 degree of phase difference1Sinusoidal signal, the anglec of rotation θ m on rotor can be accessed1Respectively
Into sinusoidal variations and the voltage signal of varies with cosine, this basis letter needed for as asking for the anglec of rotation of rotor in the prior art
Number, therefore send these basis signals to the follow-up signal processing circuit for connecting or can obtain rotor by simple computation
Anglec of rotation θ m1。
The coil for making the stator of rotary transformer the 3rd detection coil system detect on tooth 1109,1110,1111,1112
Inductance is respectively L1109, L1110, L1111, L1112.As seen from Figure 1 with rotor the anglec of rotation change, it is each fixed
Gap between sub- tooth and rotor with salient pole changes so that the inductance of each coil changes therewith, and its period of change is 9.3rd inspection
The stator of test coil system detects the inductance of the coil on tooth 1109,1110,1111,1112 with the anglec of rotation θ m of rotor1Become
Change can be expressed as：
L1109=L1+Lm1*sin(9θm1) formula (117)
L1110=L1+Lm1*sin(9θm1+ 90) formula (118)
L1111=L1+Lm1*sin(9θm1+ 180) formula (119)
L1112=L1+Lm1*sin(9θm1+ 270) formula (120)
With reference to the 3rd bridge circuit：
The bridge arm X being made up of the coil on stator detection tooth 1109AC3Inductance L_AC3 be：
L_AC3=L1109=L1+Lm1*sin(9θm1) formula (121)
The bridge arm X being made up of the coil on stator detection tooth 1110AD3Inductance L_AD3 be：
L_AD3=L1110=L1+Lm1*sin(9θm1+ 90) formula (122)
The bridge arm X being made up of the coil on stator detection tooth 1111BC3Inductance L_BC3 be：
L_BC3=L1111=L1+Lm1*sin(9θm1+ 180) formula (123)
The bridge arm X being made up of the coil on stator detection tooth 1112BD3Inductance L_BD3 be：
L_BD3=L1112=L1+Lm1*sin(9θm1+ 270) formula (124)
From formula (117)-formula (124), the fundametal compoment of four inductance of bridge arm of the 3rd bridge circuit is phase successively
90 degree of sine wave is differed from, the output voltage for being easy to obtain bridge circuit contact C3 and contact D3 by the simple computation of circuit is
The anglec of rotation θ m of the rotor that 90 degree of phase difference1Sinusoidal signal, the anglec of rotation θ m on rotor can be accessed1Respectively into
The voltage signal of sinusoidal variations and varies with cosine, this basis letter needed for as asking for the anglec of rotation of rotor in the prior art
Number, therefore send these basis signals to the follow-up signal processing circuit for connecting or can obtain rotor by simple computation
Anglec of rotation θ m1。
As can be seen here, three detection coil systems of the present embodiment rotary transformer are wound on same stator, can be simultaneously
The anglec of rotation of the independent detection rotor.In three detection coil systems, can using one or two as back-up system,
Enabled when the detection coil system of work at present breaks down；Can also three detection coil systems use simultaneously, detection knot
Fruit is compared to each other.Above two occupation mode can be greatly enhanced the detection reliability of the rotary transformer, and due to three
Individual detection coil system is on common stator, the number of the rotary transformer for using can be saved, so as to greatly save
Detection takes up room and cost.
Second embodiment：
In second embodiment, S values are that 1, K values are 10, so that the rotary transformer has 8 stator detections tooth and 10
Individual rotor with salient pole.Fig. 4 show the schematic cross-section of the rotor of the rotary transformer in the present embodiment.Stator core and rotor
Iron core is stamped and formed out using silicon steel sheet.In the present embodiment, 8 stator detection teeth are uniformly distributed along stator core inner surface；10
Individual rotor with salient pole is uniformly distributed along the outer round surface of rotor core.In the present embodiment, stator also includes that 8 is each equally distributed fixed
Subsolution coupling tooth 10.
There is Insulated winding wire skeleton on each stator detection tooth (not shown in Fig. 4).It is wound with and only on each stator detection tooth
1 coil is full of, 8 coils are had circumferentially on 8 stator detection teeth, 8 stator detection teeth circumferentially divide clockwise
Cloth is followed successively by 2101,2102,2103,2104,2105,2106,2107,2108.For accompanying drawing for purpose of brevity, and due to stator
The distribution and reference for detecting tooth are regular, do not mark each stator to detect the reference of tooth one by one in fig. 4, are only given
Go out several examples.The inductance of each coil changes with the change of the anglec of rotation of rotor.In Fig. 4,10 represent stator decoupling tooth.This
In embodiment, the DC component of the inductance of each coil is equal, and the fundamental voltage amplitude of the inductance of each coil is equal.In the present embodiment, lead to
Cross the shape that Electromagnetic Simulation selects rotor with salient pole so that the changing unit of the inductance of coil becomes with the anglec of rotation of rotor in sinusoidal
Change.
In the present embodiment, altogether including two detection coil systems, the first detection coil system include stator detection tooth 2101,
2102nd, the coil on 2103,2104, the second detection coil system is included on stator detection tooth 2105,2106,2107,2108
Coil, two detection coil systems constitute two independent rotary transformer detection coil systems, separately constitute the first bridge-type electricity
Circuit diagram after road and the second bridge circuit, the first bridge circuit and the connection of the second bridge circuit is as shown in Figure 5.In Fig. 5
Bridge circuit near left side is the first bridge circuit, and the bridge circuit near right side is the second bridge circuit.
In Fig. 5, the bridge arm X of the first bridge circuitAC1It is made up of the coil on stator detection tooth 2101, bridge arm XAD1By stator
Coil on detection tooth 2102 is constituted, bridge arm XBC1It is made up of the coil on stator detection tooth 2103, bridge arm XBD1Detected by stator
Coil on tooth 2104 is constituted.4 connecting nodes A1, B1, C1, D1 of first bridge circuit draw conduct with 4 leads respectively
The lead-out wire of the first Rotary transformer system including the first bridge circuit, wherein two is excitation wire, two is signal in addition
Line.Four lead-out wires constitute first group of lead-out wire 801 of the present embodiment.
In Fig. 5, the bridge arm X of the second bridge circuitAC2It is made up of the coil on stator detection tooth 2105, bridge arm XAD2By stator
Coil on detection tooth 2106 is constituted, bridge arm XBC2It is made up of the coil on stator detection tooth 2107, bridge arm XBD2Detected by stator
Coil on tooth 2108 is constituted.4 connecting nodes A2, B2, C2, D2 of second bridge circuit draw conduct with 4 leads respectively
The lead-out wire of the second Rotary transformer system including the second bridge circuit, wherein two is excitation wire, two is signal in addition
Line.Four lead-out wires constitute second group of lead-out wire 802 of the present embodiment.
In the present embodiment, the construction of the rotary transformer is in integral part in addition to the foregoing and first embodiment
It is similar, therefore its these construction may be referred to Fig. 2 of first embodiment, only draw including two groups from the present embodiment unlike Fig. 2
Outlet 801 and 802, and do not include the 3rd group of lead-out wire 803 of first embodiment.
In the present embodiment, the principle that sine wave position signalling is produced is as follows：
The first detection coil of rotary transformer system stator is made to detect the electricity of the coil on tooth 2101,2102,2103,2104
Sense is respectively L2101, L2102, L2103, L2104.As seen from Figure 4 with rotor the anglec of rotation change, each stator
Gap between tooth and rotor with salient pole changes so that the inductance of each coil changes therewith, and its period of change is 10.First inspection
The stator of test coil system detects the inductance of the coil on tooth 2101,2102,2103,2104 with the anglec of rotation θ m of rotor2Become
Change can be expressed as：
L2101=L2+Lm2*sin(10θm2) formula (201)
L2102=L2+Lm2*sin(10θm2- 90) formula (202)
L2103=L2+Lm2*sin(10θm2- 180) formula (203)
L2104=L2+Lm2*sin(10θm2- 270) formula (204)
Wherein, L2 is the DC component of each inductance；
Lm2It is the fundamental voltage amplitude of each inductance；
θm2It is the anglec of rotation of rotor.
With reference to the first bridge circuit：
The bridge arm X being made up of the coil on stator detection tooth 2101AC1Inductance L_AC1 be：
L_AC1=L2101=L2+Lm2*sin(10θm2) formula (205)
The bridge arm X being made up of the coil on stator detection tooth 2102AD1Inductance L_AD1 be：
L_AD1=L2102=L2+Lm2*sin(10θm2- 90) formula (206)
The bridge arm X being made up of the coil on stator detection tooth 2103BC1Inductance L_BC1 be：
L_BC1=L2103=L2+Lm2*sin(10θm2- 180) formula (207)
The bridge arm X being made up of the coil on stator detection tooth 2104BD1Inductance L_BD1 be：
L_BD1=L2104=L2+Lm2*sin(10θm2- 270) formula (208)
From formula (201)-formula (208), the inductance fundametal compoment of four bridge arms of the first bridge circuit is to differ successively
90 degree of sine wave, the output voltage for being easy to obtain the contact C1 and contact D1 of bridge circuit by the simple computation of circuit is
The anglec of rotation θ m of the rotor that 90 degree of phase difference2Sinusoidal signal, the anglec of rotation θ m on rotor can be accessed2Respectively into
The voltage signal of sinusoidal variations and varies with cosine, this basis letter needed for as asking for the anglec of rotation of rotor in the prior art
Number, therefore send these basis signals to the follow-up signal processing circuit for connecting or can obtain rotor by simple computation
Anglec of rotation θ m2。
The coil for making the stator of rotary transformer the second detection coil system detect on tooth 2105,2106,2107,2108
Inductance is respectively L2105, L2106, L2107, L2108.As seen from Figure 4 with rotor the anglec of rotation change, it is each fixed
Gap between sub- tooth and rotor with salient pole changes so that the inductance of each coil changes therewith, and its period of change is 10.Second
The stator of detection coil system detects the inductance of the coil on tooth 2105,2106,2107,2108 with the anglec of rotation θ m of rotor2
Change can be expressed as：
L2105=L2+Lm2*sin(10θm2) formula (209)
L2106=L2+Lm2*sin(10θm2- 90) formula (210)
L2107=L2+Lm2*sin(10θm2- 180) formula (211)
L2108=L2+Lm2*sin(10θm2- 270) formula (212)
With reference to the second bridge circuit：
The bridge arm X being made up of the coil on stator detection tooth 2105AC2Inductance L_AC2 be：
L_AC2=L2105=L2+Lm2*sin(10θm2) formula (213)
The bridge arm X being made up of the coil on stator detection tooth 2106AD2Inductance L_AD2 be：
L_AD2=L2106=L2+Lm2*sin(10θm2- 90) formula (214)
The bridge arm X being made up of the coil on stator detection tooth 2107BC2Inductance L_BC2 be：
L_BC2=L2107=L2+Lm2*sin(10θm2- 180) formula (215)
The bridge arm X being made up of the coil on stator detection tooth 2108BD2Inductance L_BD2 be：
L_BD2=L2108=L2+Lm2*sin(10θm2- 270) formula (216)
From formula (209)-formula (216), the inductance fundametal compoment of four bridge arms of the second bridge circuit is to differ successively
90 degree of 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
The anglec of rotation θ m of the rotor that 90 degree of phase difference2Sinusoidal signal, the anglec of rotation θ m on rotor can be accessed2Respectively into
The voltage signal of sinusoidal variations and varies with cosine, this basis letter needed for as asking for the anglec of rotation of rotor in the prior art
Number, therefore send these basis signals to the follow-up signal processing circuit for connecting or can obtain rotor by simple computation
Anglec of rotation θ m2。
In the present embodiment, stator decoupling tooth 10 is arranged between two stator detection teeth, is especially placed at two stator inspections
The position of centre between survey tooth.Due to being provided with stator decoupling tooth, therefore actually measured magnitude of voltage and above-mentioned various middle reason
By upper calculating inductance value corresponding to magnitude of voltage more closely, so that the precision of the anglec of rotation of final detection is carried significantly
It is high；Meanwhile, the setting of stator decoupling tooth causes that the response quickly of system of the rotary transformer is greatly improved, and simplifies rotation change
The system architecture of depressor.
As can be seen here, two detection coil systems of the present embodiment rotary transformer are wound on same stator, can be simultaneously
The anglec of rotation of the independent detection rotor.In two detection coil systems, can work as using one of them as back-up system
The detection coil system of preceding work is enabled when breaking down；Can also two detection coil systems use simultaneously, testing result phase
Mutually compare.Above two occupation mode can be greatly enhanced the detection reliability of the rotary transformer, and due to two inspections
Test coil system is on common stator, the number of the rotary transformer for using can be saved, so as to greatly save detection
Take up room and cost.
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 present invention, it is also possible to set the shape of rotor with salient pole to cause the change of the inductance of coil
Part changes with the anglec of rotation of rotor in triangular wave.
In above-described embodiment, rotor is arranged in the inside of stator；In the present invention, rotor can also be arranged in stator
It is outside.
The invention allows for a kind of rotary body with above-mentioned rotary transformer.The rotary body include rotary body body and
Above-mentioned rotary transformer.Wherein, the anglec of rotation of the anglec of rotation of rotary transformer and rotary body body into rule relation, because
This angle that can be detected by rotary transformer obtains the anglec of rotation of rotary body body.
3rd embodiment：
In 3rd embodiment, rotary body body is motor, and rotary transformer is as a example by comprising two sets of detection coil systems.
Fig. 6 show the structural representation of rotary body in the present embodiment.In Fig. 6,301 represent the machine that rotary transformer is shared with motor
Shell, 302 represent the stator of rotary transformer, and the stator 302 of rotary transformer is arranged on the casing 301 shared with motor；
303 stators for representing motor, 304 represent the rotor core of rotary transformer, and 305 represent the rotor core of motor, rotation
The rotor core 304 of transformer is rotated together with the rotor core 305 of motor, and 306 represent rotating shaft；3071st, 3072 difference table
Show front and rear cover；308 represent bearing, it is ensured that the smooth rotation of rotor relative stator；Rotary transformer includes two sets of detection coil systems
System, thus including two groups of lead-out wires, 3091,3,092 first group of lead-out wire of expression rotary transformer and second group of extraction respectively
Line, every group of lead-out wire includes four lead-out wires altogether, and in four lead-out wires, two lead-out wires are excitation wire, in addition two lead-out wires
It is holding wire, 3010 represent the lead of motor, and 3011 represent rotary transformer coil, and 3012 represent motor winding.This reality
Apply in example, rotary body is the integral motor that rotary transformer is integrally formed with motor body.
Fourth embodiment：
In fourth embodiment, rotary body body is motor, and rotary transformer is as a example by comprising two sets of detection coil systems.
Fig. 7 show the structural representation of rotary body in the present embodiment.In Fig. 7,401 represent rotary transformer, and 402 represent motor,
403 represent motor rotary shaft；Rotary transformer 401 includes two sets of detection coil systems, thus including two groups of lead-out wires, 4041 tables
Show first group of lead-out wire of rotary transformer, 4042 represent second group of lead-out wire of rotary transformer；405 represent electronic power traction
Line, 406 is screw.In the present embodiment, rotary transformer 401 is arranged on the end of motor body 402, motor rotary shaft 403
Synchronous rotary is connected with rotary transformer rotating shaft shaft coupling (not shown in Fig. 7).As can be seen here, in the present embodiment, rotary body
For the split-type structural that rotary transformer and motor body are constituted.
The same stator of rotary transformer of the present invention and the rotary body with this rotary transformer in rotary transformer
The upper detection coil system for setting two sets or more than two sets, in use, can be by one or more sets detection coil systems
As back-up system, when currently used detection coil system breaks down, it is switched to another set of detection coil system and continues
Work, substantially increases the reliability of anglec of rotation detection；Two sets can also be made and detection coil system is covered while the inspection that works more
The anglec of rotation is surveyed, testing result is compared, it is also possible to greatly improve the reliability of testing result.As can be seen here, energy of the present invention
Two sets or more than two sets of detection coil system is set on a rotary transformer, on an equal basis may be used compared to having in the prior art
By many Rotary transformer systems of property, the rotary transformer quantity of required setting is few, and shared volume is few, and cost drops significantly
It is low；Compared to many Rotary transformer systems for setting equal number rotary transformer in the prior art, when occupancy volume is identical,
Reliability is then greatly improved.
Meanwhile, the present invention can be realized on each stator detection tooth at most around 1 coil, enormously simplify production work
Skill, effectively prevent because the position of winding is different so that the uniformity of rotary transformer is adversely affected, and overcomes existing
There are the short-circuit risks on same stator tooth between different windings in technology；Additionally, the present invention can also be wound with the different of coil
Stator decoupling tooth is set between stator detection tooth, and the magnetic coupling being effectively reduced or eliminated between different stator detection teeth is done
Disturb.
The above-mentioned description to embodiment is to be understood that and apply this hair for ease of those skilled in the art
It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein
General Principle is applied in other embodiment without by performing creative labour.Therefore, the invention is not restricted to implementation here
Example, those skilled in the art's announcement of the invention, not departing from improvement that scope made and modification all should be
Within protection scope of the present invention.
Claims (14)
1. a kind of rotary transformer, it is characterised in that：Including stator and rotor；There is the stator stator to detect tooth, described turn
Son has rotor with salient pole；
The rotary transformer includes at least two sets detection coil systems；Often cover the detection coil system and be wound on institute including multiple
The coil on stator detection tooth is stated, the inductance of the coil changes with the change of the anglec of rotation of the rotor, with according to institute
State the anglec of rotation of the change detection rotor of the inductance of coil；
At least two sets detection coil systems are arranged on same stator.
2. rotary transformer according to claim 1, it is characterised in that：In often covering the detection coil system, Duo Gesuo
State coil and constitute bridge circuit, each bridge arm of the bridge circuit is made up of a coil or is connected by multiple coils
Constitute, lead-out wire is drawn from the intersecting junction of the bridge arm of the bridge circuit, as excitation wire or holding wire.
3. rotary transformer according to claim 1, it is characterised in that：The stator detection number of teeth is 4* (S+1), rotor with salient pole
Number is K, and wherein S and K is positive integer, and K/ (S+1) is not equal to even number；And when (S+1) is equal to 3*R and R is positive integer, K
It is not equal to the positive integer times of 2*R.
4. the rotary transformer according to any one of claim 1-3, it is characterised in that：Set on each stator detection tooth
Most coils.
5. rotary transformer according to claim 1, it is characterised in that：In often covering the detection coil system：Including extremely
Few four groups of stator coils, every group of stator coil includes at least one coil, and the coil is wound on the stator detection tooth；It is all
The group stator coil composition bridge circuit, every group of stator coil constitutes a bridge arm of the bridge circuit；The bridge-type electricity
Lu Zhong, the intersecting bridge arm of each two constitutes a contact in intersection, and a lead-out wire is drawn from junction each described；
Preferably, in often covering the detection coil system：The quantity of stator coil interior loop described in each group is identical with distribution；Each group
The phase of the combination inductance of the stator coil differs 90 degree successively；
Preferably, in often covering the detection coil system：The DC component of the inductance of each coil is equal, each coil
Fundamental voltage amplitude is equal；
Preferably, often set detection coil system includes four groups of stator coils, constitutes the bridge circuit of four bridge legs, is connect with four
Point, four lead-out wires are drawn from four junctions, wherein two lead-out wires are excitation wire, in addition two extractions
Line is holding wire.
6. the rotary transformer according to any one of claim 1-5, it is characterised in that：The stator also includes stator solution
Coupling tooth, stator decoupling tooth is provided with described at least one in each both sides for being wound with stator detection tooth of coil, reducing or
Elimination is wound with the magnetic coupling interference between the different stator detection tooth of coil；
Preferably, the material of the stator decoupling tooth is consistent with the material of stator detection tooth and stator body；
It is further preferred that the material is permeability magnetic material.
7. rotary transformer according to claim 3, it is characterised in that：
The stator detection number of teeth is 8, and the rotor with salient pole number is K, and K is not equal to 4 integral multiple；Preferably, described turn
Sub- salient pole number is 10；
Or, the stator detection number of teeth is 12, and the rotor with salient pole number is K, and K is not equal to 2 integral multiple；Preferably,
The rotor with salient pole number is 9；
Or, the stator detection number of teeth is 16, and the rotor with salient pole number is K, and K is not equal to 8 integral multiple；
Or, the stator detection number of teeth is 20, and the rotor with salient pole number is K, and K is not equal to 10 integral multiple；
Or, the stator detection number of teeth is 24, and the rotor with salient pole number is K, and K is not equal to 4 integral multiple；
Or, the stator detection number of teeth is 28, and the rotor with salient pole number is K, and K is not equal to 14 integral multiple；
Or, the stator detection number of teeth is 32, and the rotor with salient pole number is K, and K is not equal to 16 integral multiple.
8. the rotary transformer according to claim 3 or 6, it is characterised in that：
The stator detection number of teeth is 8, and at least one stator solution is respectively provided with each both sides for being wound with the stator detection tooth of coil
Coupling tooth, the rotor with salient pole number is K, and K is not equal to 4 integral multiple；Preferably, the rotor with salient pole number is 10, stator solution
The coupling number of teeth is 8；
Or, the stator detection number of teeth is 12, and at least one is respectively provided with each both sides for being wound with the stator detection tooth of coil
The stator decouples tooth, and the rotor with salient pole number is K, and K is not equal to 2 multiple；
Or, the stator detection number of teeth is 16, and at least one is respectively provided with each both sides for being wound with the stator detection tooth of coil
The stator decouples tooth, and the rotor with salient pole number is K, and K is not equal to 8 integral multiple；
Or, the stator detection number of teeth is 20, and at least one is respectively provided with each both sides for being wound with the stator detection tooth of coil
The stator decouples tooth, and the rotor with salient pole number is K, and K is not equal to 10 integral multiple；
Or, the stator detection number of teeth is 24, and at least one is respectively provided with each both sides for being wound with the stator detection tooth of coil
The stator decouples tooth, and the rotor with salient pole number is K, and K is not equal to 4 multiple；
Or, the stator detection number of teeth is 28, and at least one is respectively provided with each both sides for being wound with the stator detection tooth of coil
The stator decouples tooth, and the rotor with salient pole number is K, and K is not equal to 14 integral multiple；
Or, the stator detection number of teeth is 32, and at least one is respectively provided with each both sides for being wound with the stator detection tooth of coil
The stator decouples tooth, and the rotor with salient pole number is K, and K is not equal to 16 integral multiple.
9. rotary transformer according to claim 1, it is characterised in that：With stator cage, end cap, bearing and rotating shaft；
The stator includes stator core, and the stator core is arranged on the stator cage；
The rotor includes rotor core, and the rotor core is arranged in the rotating shaft, is rotated together with the rotating shaft.
10. rotary transformer according to claim 1, it is characterised in that：The rotor is arranged in the inside of the stator；
Or, the rotor is arranged in the outside of the stator.
A kind of 11. rotary bodies of the rotary transformer with any one of claim 1-10, it is characterised in that：The rotation
Swivel includes rotary body body and the rotary transformer；
The anglec of rotation of the anglec of rotation of the rotary transformer and the rotary body body into rule relation, with by described
Rotary transformer detects the anglec of rotation of the rotary body.
12. rotary bodies according to claim 11, it is characterised in that：The rotor core of the rotary transformer is arranged on institute
State in the rotating shaft of rotary body body, with the rotary body body synchronous axial system and formed integral structure, to detect the rotation
The anglec of rotation of body body；
The stator of the rotary transformer is arranged on the stator cage shared with the rotary body body.
13. rotary bodies according to claim 11, it is characterised in that：The rotary transformer is fixed on the rotary body sheet
The end of body；The rotating shaft of the rotary transformer be connected with the rotating shaft of the rotary body body with cause the rotary transformer and
The rotary body body is rotated coaxially；
Preferably, the rotating shaft of the rotary transformer is connected with the rotating shaft of the rotary body body by shaft coupling.
14. rotary body according to any one of claim 11-13, it is characterised in that：The rotary body body is electronic
Machine.
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| CN107063075A (en) * | 2017-05-27 | 2017-08-18 | 上海世昱电子技术有限公司 | A kind of angle sensing device |
| CN108917796A (en) * | 2018-06-20 | 2018-11-30 | 安徽沃巴弗电子科技有限公司 | A kind of inductance type rotary transformer |
| CN109391115A (en) * | 2017-08-07 | 2019-02-26 | 马渊马达株式会社 | Position sensor and motor |
| WO2021123673A1 (en) * | 2019-12-19 | 2021-06-24 | Moving Magnet Technologies | Three-phase dual electric machine and method for controlling such a machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107063075A (en) * | 2017-05-27 | 2017-08-18 | 上海世昱电子技术有限公司 | A kind of angle sensing device |
| CN109391115A (en) * | 2017-08-07 | 2019-02-26 | 马渊马达株式会社 | Position sensor and motor |
| CN108917796A (en) * | 2018-06-20 | 2018-11-30 | 安徽沃巴弗电子科技有限公司 | A kind of inductance type rotary transformer |
| CN108917796B (en) * | 2018-06-20 | 2024-01-30 | 安徽沃巴弗电子科技有限公司 | Inductive rotary transformer |
| WO2021123673A1 (en) * | 2019-12-19 | 2021-06-24 | Moving Magnet Technologies | Three-phase dual electric machine and method for controlling such a machine |
| FR3105641A1 (en) * | 2019-12-19 | 2021-06-25 | Moving Magnet Technologies | Three-phase double electric machine and method of controlling such a machine |
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