CN106655685A - Rotary transformer and rotating body equipped with same - Google Patents
Rotary transformer and rotating body equipped with same Download PDFInfo
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- CN106655685A CN106655685A CN201710116621.XA CN201710116621A CN106655685A CN 106655685 A CN106655685 A CN 106655685A CN 201710116621 A CN201710116621 A CN 201710116621A CN 106655685 A CN106655685 A CN 106655685A
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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
Abstract
The invention provides a rotary transformer and a rotating body equipped with same, and belongs to the technical field of detection. The rotary transformer comprises a stator and a rotor, wherein the stator comprises a stator yoke and stator detection teeth, and the stator detection teeth are arranged on the stator yoke; the spanning angle of the stator yoke is smaller than 360 degrees; the rotor comprises a rotor iron core; rotor salient poles are arranged on the surface of the rotor iron core; the number of the stator detection teeth is 4*K, wherein K is a positive integer; the number of the rotor salient poles is N, wherein N is a positive integer; each stator detection tooth is at most wound with a coil; the rotary transformer comprises at least one set of detection coil system; each detection coil system comprises a plurality of coils wound around the stator detection teeth; inductance of the coils is changed along with changes of the rotating angles of the rotor; and the rotating body comprises a rotating body main body and the rotary transformer, wherein the rotary angle of the rotating body main body and the rotary transformer are in a regular relationship. The miniaturization and light weight of the rotary transformer are promoted; and in addition, winding and line connection are simpler and more effective.
Description
Technical field
The invention belongs to detection technique field, is related to a kind of transformator 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 device, 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, there are shortcomings in current rotary transformer：Existing rotation
Transformator has reached the limit in a stage in miniaturization lightweight, it is difficult to break through current bottleneck；On its stator detection tooth
Multigroup winding is wound with, three groups of windings is generally wound with so that its manufacturing process is very complicated, and rotation is caused because the position of winding is different
The concordance of transformation depressor is adversely affected；Due to being wound with multigroup winding on stator detection tooth, in use, it is easy to
The problems such as there is short circuit and broken string between different windings due to reasons such as vibratory impulses, and then cause rotary transformer to fail, it is reliable
Property reduce；Traditional rotary transformer includes at least 6 lead-out wires, not only increases the failure risk of connecting line, and causes
The connection and debugging of lead-out wire is troublesome.
Meanwhile, in existing rotary transformer, especially inductance type rotary transformer, the winding on close stator tooth it
Between there is magnetic coupled phenomenon, the position signalling in winding easily by other windings magnetic-coupled impact, easily cause signal
Distortion, the precision of impact position detection.Currently, be passivity to the solution of the interference, i.e., after the interference is produced,
Uncoupling process is carried out in the signal processing circuit of its follow-up connection and/or uncoupling is carried out from algorithm calculating to suppress the magnetic
The impact of coupling, but these methods can all produce the delay of signal, be unfavorable for the fast-response energy of detecting system, while
Considerably increase the complexity of system.
Additionally, in prior art, in order to improve the reliability of rotary transformer, generally two rotary transformers are arranged on
On same rotary body, when the coil of one of which rotary transformer breaks down failure, signal circuit is switched to and another group
Rotary transformer winding connects, and is worked with the angle measurement for continuing to complete rotary body.But in this method, since it is desired that in rotation
Two sets are installed on swivel or rotary transformer is covered more, it will increases rotary body axial length, volume becomes big, and cost increases
Plus.As can be seen here, the mutual system between the occupancy volume of rotary transformer detecting system and reliability is there is in prior art
About problem.
The content of the invention
Present invention is primarily targeted at further promote miniaturization and the lightweight of rotary transformer, and coiling and connection
Line is more simple effective, and secondary objective is while the accuracy of detection and reliability of rotary transformer is improved, to simplify rotation
The construction of transformator.
In order to achieve the above object, solution of the invention is：
A kind of rotary transformer, including stator and rotor, stator includes stator yoke and stator detection tooth, the stator detection
Tooth is arranged in the stator yoke；The angle that the stator yoke is crossed over is less than 360 degree；Rotor includes rotor core, rotor ferrum
The surface of the heart is provided with rotor with salient pole；The stator detection number of teeth is 4*K, and K is positive integer；Rotor with salient pole number is N, and N is positive integer；N
During more than 1, N number of rotor with salient pole is uniformly distributed along the circumferential surface of the rotor；The stator yoke and the stator are detected
Tooth is made up of permeability magnetic material；The rotor core is made up of permeability magnetic material；At most around 1 line on each described stator detection tooth
Circle；The rotary transformer includes at least a set of detection coil system；Often cover detection coil system include it is multiple be wound on it is described fixed
Coil on son detection tooth, the inductance of the coil changes with the change of the anglec of rotation of the rotor, with according to the line
The anglec of rotation of rotor described in the change-detection of the inductance of circle.
In often covering 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 detection coil system is often covered both comprising excitation wire, and comprising holding wire；Respectively
The fundamental phase of the combination inductance of the coil of the bridge arm differs successively 90 degree.
In often covering the detection coil system：Including at least four groups stator coils, every group of stator coil includes at least one
The coil；Stator coil composition bridge circuit described in all groups, every group of stator coil constitutes a bridge of the bridge circuit
Arm；In the bridge circuit, the intersecting bridge arm of each two constitutes a contact in intersection, and from junction each described one is drawn
Root lead-out wire；Preferably, in often covering the detection coil system：The quantity of stator coil interior loop described in each group and distribution phase
Together；Preferably, often covering detection coil system includes four groups of stator coils, constitutes the bridge circuit of four bridge legs, connects with four
Point, from four junctions four lead-out wires are drawn, wherein two lead-out wires are excitation wire, two extractions in addition
Line is holding wire.
The rotary transformer includes two sets or more than two sets of detection coil system；At least two sets detection coil systems
The coil of system is arranged on same stator.
Respectively cover between the detection coil system, excitation wire is shared, holding wire independence；Or, respectively cover the detection coil
Between system, excitation wire independence, holding wire independence.
The shape of the rotor with salient pole is set, so that the changing unit of the inductance of each coil is with the rotor
The anglec of rotation be changing into sine wave change；Or, the shape of the rotor with salient pole is set, so that each coil
The changing unit of inductance is changing into triangular wave change with the anglec of rotation of the rotor.
Circumferential surface of the stator detection tooth along the side closer to the rotor of the stator yoke is distributed, adjacent
Stator detection tooth is separated by the angle arrangement of setting, so that the fundamental phase of the combination inductance of the coil on each bridge arm is successively
90 degree of difference.
The stator also includes stator assist tooth, to improve the symmetry of magnetic circuit system；The stator assist tooth is arranged on
The stator detects the outside of tooth；The material of the stator assist tooth is permeability magnetic material.
The stator also includes that stator decouples tooth, to reduce the magnetic coupling being wound between the stator of coil detection tooth；
Stator decoupling tooth is arranged on and is wound with the stator of coil and detects the both sides of tooth, be wound with coil stator detection tooth it
Between at least provided with 1 stator decoupling tooth；The material of the stator decoupling tooth is permeability magnetic material.
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.
Preferably, the rotary body body is motor.
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 of the rotary body body connects 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.
Preferably, the rotary body body is motor.
Due to adopting such scheme, the invention has the beneficial effects as follows：Rotary transformer of the present invention and with it is this rotation become
In the rotary body of depressor, the angle that the stator yoke of rotary transformer is crossed over is less than 360 degree, is greatly promoted rotary transformer
Miniaturization and lightweight, and can realize 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 concordance of rotary transformer is adversely affected, and overcomes existing
There are the short-circuit risks on same stator detection tooth between different windings in technology.Meanwhile, only with the rotation of a set of detection coil system
The lead-out wire of transformation depressor can be reduced to only 4, reduce wiring risk and install, safeguard and the triviality debugged.
Tooth and/or stator assist tooth are decoupled by arranging stator, the mode for actively avoiding magnetic coupling from disturbing is greatly optimized
The precision of rotary transformer, while improve its fast-response energy, simplifies the system structure of rotary transformer.Additionally, energy
Enough detection coil systems that two sets or more than two sets are arranged on same stator, in use, can will be a set of or many
Set detection coil system, in currently used detection coil system malfunctions, is switched to another set of inspection as back-up system
Test coil system works on, and substantially increases the reliability of anglec of rotation detection；Two sets can also be made or detection coil is covered more
The system simultaneously operation detection anglec of rotation, testing result is compared, it is also possible to greatly improve the reliability of testing result.Thus
It can be seen that, the present invention can arrange two sets or more than two sets of detection coil system on a rotary transformer, compared to existing skill
Many Rotary transformer systems with equal reliability in art, few, the shared volume of the rotary transformer quantity of required setting
Few, cost is substantially reduced；Compared to many Rotary transformer systems that equal number rotary transformer is arranged in prior art, accounting for
With volume it is identical when, reliability is then greatly improved.
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 circuit diagram of bridge circuit in first embodiment of the invention；
Fig. 3 is the schematic cross-section of the rotor of rotary transformer in second embodiment of the invention；
Fig. 4 is the schematic cross-section of the rotor of rotary transformer in third embodiment of the invention；
Fig. 5 is the schematic cross-section of the rotor of rotary transformer in fourth embodiment of the invention；
Fig. 6 is the circuit diagram of bridge circuit in fourth embodiment of the invention；
Fig. 7 is the structural representation of rotary body in sixth embodiment of the invention.
Specific embodiment
Below in conjunction with accompanying drawing illustrated embodiment, the present invention is further illustrated.
The present invention proposes a kind of rotary transformer.The rotary transformer includes stator and rotor；Stator includes stator yoke
Tooth is detected with stator, stator detection tooth is arranged in stator yoke；The angle that stator yoke is crossed over is less than 360 degree.Rotor includes turning
Sub unshakable in one's determination, the surface of rotor core is provided with rotor with salient pole；The stator detection number of teeth is 4*K, and K is positive integer；Rotor with salient pole number is
N, N are positive integer.When N is more than 1, N number of rotor with salient pole is uniformly distributed along the circumferential surface of rotor；Stator yoke and stator detection tooth are equal
It is made up of permeability magnetic material；Rotor core is also made up of permeability magnetic material.At most around 1 coil on each stator detection tooth.
In the present invention, the rotary transformer includes at least a set of detection coil system.Detection coil system is often covered including many
The individual coil being wound on stator detection tooth, the inductance of coil changes with the change of the anglec of rotation of rotor, with according to coil
The anglec of rotation of the change-detection rotor of inductance.
Often cover in detection coil system, multiple coils constitute bridge circuit, and each bridge arm of bridge circuit is by a coil structure
Into or it is in series by multiple coils, lead-out wire is drawn from the intersecting junction of the bridge arm of bridge circuit, as excitation wire or letter
Number line；Often cover detection coil system and both include excitation wire, and comprising holding wire.The fundamental wave phase of the combination inductance of the coil of each bridge arm
Position differs successively 90 degree.
Often cover in detection coil system：Including at least four groups stator coils, every group of stator coil includes that at least one is above-mentioned
Coil；All groups of stator coils constitute bridge circuit, and every group of stator coil constitutes a bridge arm of bridge circuit；Bridge circuit
In, the intersecting bridge arm of each two constitutes a contact in intersection, and from each junction a lead-out wire is drawn.
Preferably, often cover in detection coil system：The quantity of each group stator coil interior loop is identical with distribution.
Preferably, often covering detection coil system includes four groups of stator coils, the bridge circuit of four bridge legs is constituted, with four
Individual contact, from four junctions four lead-out wires are drawn, wherein two lead-out wires are excitation wire, in addition two lead-out wires are signal
Line.
Rotary transformer can include two sets or more than two sets of detection coil system, two sets of detection coil systems of wherein at least
The coil of system is arranged on same stator.
Between each set detection coil system, can be shared with excitation wire, holding wire independence；Can also excitation wire independence, signal
Line independence.
Stator detects that circumferential surface of the tooth along the side closer to rotor of stator yoke is distributed, adjacent stator detection tooth phase
Arrange every certain angle, so that the fundamental phase of the combination inductance of the coil on each bridge arm differs successively 90 degree, above-mentioned one
Fixed angle is the angle of setting.
In the present invention, stator can also include stator assist tooth, the i.e. not stator tooth of wound around coil, to improve magnetic circuit system
Symmetry, (if being not provided with stator assist tooth, outermost stator detection tooth is detected with the stator of inner side to improve accuracy of detection
The magnetic resistance of tooth can be inconsistent, so that the fundamental voltage amplitude and DC component of the inductance of each stator detection tooth coil are inconsistent,
Accuracy of detection is adversely affected)；Stator assist tooth is arranged on the outside that stator detects tooth；The material of stator assist tooth is to lead
Magnetic material.Not wound around coil on stator assist tooth.
In the present invention, stator can also include that stator decouples tooth, the i.e. not stator tooth of wound around coil, and to reduce coil is wound with
Stator detection tooth between magnetic coupling；Stator decoupling tooth is arranged on the both sides of the stator detection tooth for being wound with coil, is wound with coil
Stator detection tooth between at least provided with 1 stator decoupling tooth；The material of stator decoupling tooth is permeability magnetic material.
First embodiment：
In the present embodiment, K=1, N=4, thus the stator detection number of teeth of the rotary transformer is 4, rotor with salient pole number is 4.
Fig. 1 show the schematic cross-section of the rotor of the rotary transformer.Stator includes stator yoke and stator detection tooth, stator detection
Tooth is arranged in stator yoke；The angle that stator yoke is crossed over is less than 360 degree, and rotor includes rotor core.Stator core and rotor
Iron core is stamped and formed out using stalloy.In the present embodiment, 4 rotor with salient pole are uniformly distributed along rotor core surface perimeter, and 4
Individual stator detection tooth is distributed along the circumferential surface of stator yoke, 4 stator detection teeth circumferentially clockwise distribution be followed successively by 1101,
1102、1103、1104.Stator detects that the angle between tooth 1101 and stator detection tooth 1102 is 22.5 degree, stator detection tooth
Angle between 1102 and stator detection tooth 1103 is 22.5 degree, the folder between stator detection tooth 1103 and stator detection tooth 1104
Angle is 22.5 degree；There is Insulated winding wire skeleton (not shown in figure 1) on each stator detection tooth.1 is wound with each stator detection tooth
Individual coil, each coil turn is identical.The inductance of each coil 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 so that the changing unit of the inductance of coil is with the anglec of rotation of rotor in sine
Change.
In the present embodiment, altogether including four groups of stator coils.Every group of stator coil includes 1 coil；In four groups of stator coils,
The fundamental phase of the combination inductance of each group stator coil differs successively 90 degree.Four groups of stator coils constitute bridge circuit, shown in Fig. 2
For the circuit diagram of the bridge circuit.In Fig. 2, the bridge arm X of bridge circuitACDetect that the coil on tooth 1101 is constituted by stator, bridge arm
XADDetect that the coil on tooth 1102 is constituted by stator, bridge arm XBCDetect that the coil on tooth 1103 is constituted by stator, bridge arm XBDBy fixed
Coil on son detection tooth 1104 is constituted.4 contacts A, B, C, D of bridge circuit are drawn with 4 leads become as rotation respectively
The lead-out wire of depressor, wherein two lead-out wires are excitation wire, in addition two lead-out wires are holding wire.
The rotary transformer draws including stator, rotor, rotating shaft, bearing, stator cage, the end cap of both sides, bearing chamber, four
Outlet.Rotor core is fixed in rotating shaft, can be rotated together with rotating shaft.Bearing is arranged in rotating shaft, and bearings rotor is put down
Cunning is swimmingly rotated.Stator core is fixed in stator cage.Bearing chamber is arranged on the two side ends lid of rotary transformer,
The outer ring of bearing is arranged in the bearing room of two end caps, it is ensured that the centrage of rotating shaft is consistent with the inner circle centrage of stator.
In the present embodiment, the principle that sine wave position signalling is produced is as follows：
Make stator detection tooth 1101,1102,1103,1104 on coil inductance be respectively L101, L102, L103,
L104.As seen from Figure 1, with rotor the anglec of rotation change, the gap between each stator detection tooth and rotor with salient pole
Change so that the inductance of each coil changes therewith, its period of change is 4.The inductance of each coil with rotor anglec of rotation θ
m1Change can be expressed as (here, ignore between coil magnetic coupling interference and magnetic circuit it is asymmetric)：
L101=L1+Lm1*sin(4θm1) formula (101)
L102=L1+Lm1*sin(4θm1- 90) formula (102)
L103=L1+Lm1*sin(4θm1- 180) formula (103)
L104=L1+Lm1*sin(4θm1- 270) formula (104)
Wherein, L1 is the DC component of each inductance；
Lm1For the fundamental voltage amplitude of each inductance；
θm1For the anglec of rotation of rotor.
With reference to the bridge circuit figure of Fig. 2, the bridge arm X that the coil on tooth 1101 is constituted is detected by statorACInductance L_AC be：
L_AC=L101=L1+Lm1*sin(4θm1) formula (105)
The bridge arm X that the coil on tooth 1102 is constituted is detected by statorADInductance L_AD be：
L_AD=L102=L1+Lm1*sin(4θm1- 90) formula (106)
The bridge arm X that the coil on tooth 1103 is constituted is detected by statorBCInductance L_BC be：
L_BC=L103=L1+Lm1*sin(4θm1- 180) formula (107)
The bridge arm X that the coil on tooth 1104 is constituted is detected by statorBDInductance L_BD be：
L_BD=L104=L1+Lm1*sin(4θm1- 270) formula (108)
Observation type (101)-formula (108) understands that the fundametal compoment of the inductance of four bridge arms of bridge circuit is to differ successively
90 degree of sine wave, the output voltage for being easy to obtain the contact C of bridge circuit and contact D by the simple computation of circuit is phase
The anglec of rotation θ m of the rotor that 90 degree of potential difference1Sinusoidal signal, the anglec of rotation θ m with regard to rotor can be accessed1Respectively into just
String changes the voltage signal with varies with cosine, and this is in prior art the basis signal needed for the anglec of rotation for asking for rotor,
Therefore these basis signals are sent to the follow-up signal processing circuit for connecting or rotor is obtained through simple computation
Anglec of rotation θ m1。
In the present embodiment, the angle that the stator yoke of rotary transformer is crossed over is less than 360 degree, is greatly promoted rotation and becomes
The miniaturization of depressor and lightweight；Meanwhile, the present embodiment can be realized on each stator detection tooth at most around 1 coil, greatly
Production technology is simplified greatly, be effectively prevent and is caused the concordance of rotary transformer to be subject to unfavorable shadow because the position of winding is different
Ring, and overcome the short-circuit risks in prior art on same stator detection tooth between different windings.Additionally, rotary transformer draws
Outlet can be reduced to only 4, reduce wiring risk and install, safeguard and the triviality debugged.
Second embodiment：
In the present embodiment, K=1, N=5, thus the stator detection number of teeth of the rotary transformer is 4, rotor with salient pole number is 5.
Fig. 3 show the schematic cross-section of the rotor of the rotary transformer.Stator includes stator yoke and stator detection tooth, stator detection
Tooth is arranged in stator yoke；The angle that stator yoke is crossed over is less than 360 degree, and rotor includes rotor core.Stator core and rotor
Iron core is stamped and formed out using stalloy.In the present embodiment, 5 rotor with salient pole are uniformly distributed along rotor core surface perimeter.4
Individual stator detection tooth is distributed along the circumferential surface of stator yoke, 4 stator detection teeth circumferentially clockwise distribution be followed successively by 2101,
2102、2103、2104.Stator detects that the angle between tooth 2101 and stator detection tooth 2102 is 18 degree, stator detection tooth 2102
Detect that the angle between tooth 2103 is 18 degree with stator, the angle between stator detection tooth 2103 and stator detection tooth 2104 is 18
Degree；There is Insulated winding wire skeleton on each stator detection tooth (not shown in Fig. 3).1 coil is wound with each stator detection tooth,
Detect that 18 degree of positions counterclockwise of tooth 2101 are provided with 1 stator assist tooth 2105 in stator, in stator the up time of tooth 2104 is detected
18 degree of positions of pin are provided with 1 stator assist tooth 2106.Each coil turn is identical.The inductance of each coil with rotor the anglec of rotation
Change and change.In the present embodiment, the shape of rotor with salient pole is selected by Electromagnetic Simulation so that the change section of the inductance of coil
It is in sinusoidal variations to divide with the anglec of rotation of rotor.
In the present embodiment, altogether including four groups of stator coils.Every group of stator coil includes 1 coil；In four groups of stator coils,
The phase place of the inductance of each group stator coil differs successively 90 degree.Four groups of stator coils constitute bridge circuit, the electricity of the bridge circuit
Road figure can borrow the circuit diagram of bridge circuit in first embodiment, i.e. Fig. 2.But now, the bridge arm X of bridge circuitACBy fixed
Coil on son detection tooth 2101 is constituted, bridge arm XADDetect that the coil on tooth 2102 is constituted by stator, bridge arm XBCDetected by stator
Coil on tooth 2103 is constituted, bridge arm XBDDetect that the coil on tooth 2104 is constituted by stator.4 contact A, B from bridge circuit,
With 4 leads the lead-out wire as rotary transformer is drawn respectively at C, D, wherein two lead-out wires are excitation wire, two in addition
Lead-out wire is holding wire.
In the present embodiment, the construction of the rotary transformer is in part in addition to the foregoing and first embodiment class
Seemingly.
By arrangement above, easily proved using the method similar with first embodiment, four bridge arms of bridge circuit
The fundametal compoment of inductance is the sine wave of 90 degree of difference successively, is easy to obtain connecing for bridge circuit by the simple computation of circuit
The output voltage of point C and contact D is the anglec of rotation θ m of the rotor of 90 degree of phase contrast2Sinusoidal signal, can access with regard to
The anglec of rotation θ m of rotor2Respectively into sinusoidal variations and the voltage signal of varies with cosine, this is in prior art asks for rotor
The anglec of rotation needed for basis signal, therefore send these basis signals the signal processing circuit or Jing of follow-up connection to
Cross the anglec of rotation θ m that simple computation is obtained rotor2。
In addition to having the advantages that first embodiment, the present embodiment also by arranging stator assist tooth, actively avoids magnetic
The mode of coupled interference, greatly optimize rotary transformer precision (if being not provided with stator assist tooth, the inspection of outermost stator
Survey tooth and detect that the magnetic resistance of tooth can be inconsistent with the stator of inner side, so that the fundamental wave width of the inductance of each stator detection tooth coil
Value and DC component are inconsistent, and accuracy of detection is adversely affected), while improve its fast-response energy, simplify rotation
The system structure of transformation depressor.
3rd embodiment：
In the present embodiment, K=1, N=6, thus the stator detection number of teeth of the rotary transformer is 4, rotor with salient pole number is 6.
Fig. 4 show the schematic cross-section of the rotor of the rotary transformer.Stator includes stator yoke and stator detection tooth, stator detection
Tooth is arranged in stator yoke；The angle that stator yoke is crossed over is less than 360 degree, and rotor includes rotor core.Stator core and rotor
Iron core is stamped and formed out using stalloy.In the present embodiment, 6 rotor with salient pole are uniformly distributed on rotor core surface perimeter.4
Individual stator detection tooth is distributed along the circumferential surface of stator yoke, 4 stator detection teeth circumferentially clockwise distribution be followed successively by 3101,
3102、3103、3104.Stator detects that the angle between tooth 3101 and stator detection tooth 3102 is 15 degree, stator detection tooth 3102
Detect that the angle between tooth 3103 is 15 degree with stator, the angle between stator detection tooth 3103 and stator detection tooth 3104 is 15
Degree；There is Insulated winding wire skeleton on each stator detection tooth (not shown in Fig. 4).1 coil is wound with each stator detection tooth,
1 stator decoupling tooth is equipped with the both sides of each stator detection tooth, respectively 3105,3106,3107,3108,3109, it is each fixed
Angle between subsolution coupling tooth and adjacent stator detection tooth is 7.5 degree.Each coil turn is identical.The inductance of each coil with turn
Son the anglec of rotation change and change.In the present embodiment, the shape of rotor with salient pole is selected by Electromagnetic Simulation so that coil
The changing unit of inductance is in sinusoidal variations with the anglec of rotation of rotor.
The present embodiment includes altogether four groups of stator coils.Every group of stator coil includes 1 coil；In four groups of stator coils, respectively
The fundamental phase of the combination inductance of group stator coil differs successively 90 degree.Four groups of stator coils constitute bridge circuit, the bridge-type electricity
The circuit diagram on road can borrow the circuit diagram of bridge circuit in first embodiment, i.e. Fig. 2.But now, the bridge arm of bridge circuit
XACDetect that the coil on tooth 3101 is constituted by stator, bridge arm XADDetect that the coil on tooth 3102 is constituted by stator, bridge arm XBCBy fixed
Coil on son detection tooth 3103 is constituted, bridge arm XBDDetect that the coil on tooth 3104 is constituted by stator.4 contacts of bridge circuit
A, B, C, D draw the lead-out wire as rotary transformer with 4 leads respectively, wherein two lead-out wires are excitation wire, in addition two
Root lead-out wire is holding wire.
By arrangement above, easily proved using the method similar with first embodiment, four bridge arms of bridge circuit
The fundametal compoment of inductance is the sine wave of 90 degree of difference successively, is easy to obtain connecing for bridge circuit by the simple computation of circuit
The output voltage of point C and contact D is the anglec of rotation θ m of the rotor of 90 degree of phase contrast3Sinusoidal signal, can access with regard to
The anglec of rotation θ m of rotor3Respectively into sinusoidal variations and the voltage signal of varies with cosine, this is in prior art asks for rotor
The anglec of rotation needed for basis signal, therefore send these basis signals the signal processing circuit or Jing of follow-up connection to
Cross the anglec of rotation θ m that simple computation is obtained rotor3。
In addition to having the advantages that first embodiment, the present embodiment also decouples tooth by arranging stator, actively avoids magnetic
The mode of coupled interference, greatly optimizes the precision of rotary transformer, while improve its fast-response energy, simplifies rotation
The system structure of transformator.
Fourth embodiment：
In the present embodiment, rotary transformer includes two sets of detection coil systems, the bridge circuit in aforementioned three embodiments
Equivalent to a set of detection coil system.In the present embodiment, K=2, N=8, thus the stator detection number of teeth is 8, rotor with salient pole number
For 8.Stator includes stator yoke and stator detection tooth, and stator detection tooth is arranged in stator yoke；The angle that stator yoke is crossed over is little
In 360 degree, rotor includes rotor core.Stator core and rotor core are made up of stalloy, stator are additionally provided with stator yoke auxiliary
Tooth, Fig. 5 is helped to show the schematic cross-section of the rotor of the rotary transformer.8 rotor with salient pole are in rotor core surface perimeter
On be uniformly distributed.8 stators detection teeth are arranged clockwise along the circumference of stator yoke and are followed successively by 4101,4102,4103,
4104、4105、4106、4107、4108.1 coil is full of on each stator detection tooth.
The first set detection coil system of the Rotary transformer system by be wound on stator detection tooth 4101,4102,4103,
4 coils composition on 4104.Stator detects that the angle between tooth 4101 and stator detection tooth 4102 is 11.25 degree, stator inspection
The angle surveyed between tooth 4102 and stator detection tooth 4103 is 11.25 degree, and stator detection tooth 4103 detects tooth 4104 with stator
Between angle be 11.25 degree；There is Insulated winding wire skeleton on each stator detection tooth (not shown in Fig. 5).Each coil turn
Number is identical.
Second set of detection coil system of the Rotary transformer system by be wound on stator detection tooth 4105,4106,4107,
4 coils composition on 4108.Stator detects that the angle between tooth 4105 and stator detection tooth 4106 is 11.25 degree, stator inspection
The angle surveyed between tooth 4106 and stator detection tooth 4107 is 11.25 degree, stator detection tooth 4107 and stator detection tooth 4108 it
Between angle be 11.25 degree；There is Insulated winding wire skeleton on each stator detection tooth (not shown in Fig. 5).Each coil turn
It is identical.
In the present embodiment, 1 stator assist tooth 4109 is provided with stator detection tooth 4101 counterclockwise 11.25 degree,
1 stator assist tooth 4111 is provided with stator detection tooth 4108 clockwise 11.25 degree, tooth 4104 is detected and is determined in stator
1 stator assist tooth 4110 is provided with 11.25 degree between son detection tooth 4105.
The inductance of above-mentioned each coil changes with the change of the anglec of rotation of rotor.In the present embodiment, by Electromagnetic Simulation
Select the shape of rotor with salient pole so that the changing unit of the inductance of coil is in sinusoidal variations with the anglec of rotation of rotor.
In the present embodiment, first set detection coil system includes 4 groups of stator coils.Every group of stator coil includes 1 coil；
In four groups of stator coils, the fundamental phase of the combination inductance of each group stator coil differs successively 90 degree.Four groups of sets of stator coils
Into the first bridge circuit, as shown in the circuit diagram on the left of Fig. 6.In Fig. 6, the bridge arm X of the first bridge circuitAC1Tooth is detected by stator
Coil on 4101 is constituted, bridge arm XAD1Detect that the coil on tooth 4102 is constituted by stator, bridge arm XBC1Tooth 4103 is detected by stator
On coil constitute, bridge arm XBD1Detect that the coil on tooth 4104 is constituted by stator.4 contact A1 of the first bridge circuit, B1,
C1, D1 draw the lead-out wire as rotary transformer with 4 leads respectively, wherein two lead-out wires are excitation wire, two in addition
Lead-out wire is holding wire.
By arrangement above, easily proved using the method similar with first embodiment, four bridges of the first bridge circuit
The fundametal compoment of the inductance of arm is the sine wave of 90 degree of difference successively, is easy to obtain the first bridge-type by the simple computation of circuit
The output voltage of the contact C1 and contact D1 of circuit is the anglec of rotation θ m of the rotor of 90 degree of phase contrast4Sinusoidal signal, can
Access the anglec of rotation θ m with regard to rotor4Respectively into sinusoidal variations and the voltage signal of varies with cosine, this is prior art
In ask for needed for the anglec of rotation of rotor basis signal, therefore send these basis signals the signal processing of follow-up connection to
Circuit is obtained the anglec of rotation θ m of rotor through simple computation4。
In the present embodiment, second set of detection coil system includes 4 groups of stator coils.Every group of stator coil includes 1 coil；
In four groups of stator coils, the fundamental phase of the combination inductance of each group stator coil differs successively 90 degree.Four groups of sets of stator coils
Into the second bridge circuit, as shown in the circuit diagram on right side in Fig. 6.In Fig. 6, the bridge arm X of the second bridge circuitAC2Detected by stator
Coil on tooth 4105 is constituted, bridge arm XAD2Detect that the coil on tooth 4106 is constituted by stator, bridge arm XBC2Tooth is detected by stator
Coil on 4107 is constituted, bridge arm XBD2Detect that the coil on tooth 4108 is constituted by stator.From 4 contacts of the second bridge circuit
A2, B1, C2, D2 draw the lead-out wire as rotary transformer with 4 leads respectively, wherein two lead-out wires are excitation wire, separately
Outer two lead-out wires are holding wire.
By arrangement above, the method being similar to using first embodiment is easily proved, four bridge arms of the second bridge circuit
The fundametal compoment of inductance be to differ 90 degree of sine wave successively, be easy to obtain the second bridge-type by the simple computation of circuit electric
The output voltage of the contact C2 and contact D2 on road is the anglec of rotation θ m of the rotor of 90 degree of phase contrast4Sinusoidal signal, i.e., can
Obtain the anglec of rotation θ m with regard to rotor4Respectively into sinusoidal variations and the voltage signal of varies with cosine, this is in prior art
The basis signal needed for the anglec of rotation of rotor is asked for, therefore sends these basis signals the signal processing electricity of follow-up connection to
Road is obtained the anglec of rotation θ m of rotor through simple computation4。
In addition to having the advantages that first embodiment and second embodiment, the present embodiment arranges two on same stator
Set detection coil system, in use, can be using a set of detection coil system as back-up system, in currently used inspection
During test coil system malfunctions, it is switched to another set of detection coil system and works on, substantially increases anglec of rotation detection
Reliability；It is compared can also two sets of detection coil systems operation detection anglec of rotation simultaneously, testing result, it is also possible to
Greatly improve the reliability of testing result.Its compared in prior art with equal reliability many Rotary transformer systems,
The rotary transformer quantity of required setting is few, and shared volume is few, and cost is substantially reduced；Compared to arranging phase in prior art
With many Rotary transformer systems of quantity rotary transformer, when occupancy volume is identical, reliability is then greatly improved.
In above example, the changing unit of inductance of coil is caused to the setting of the shape of rotor with salient pole with rotor
The anglec of rotation is in sinusoidal variations, in the present invention, it is also possible to arrange the shape of rotor with salient pole so that 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.
In above-described embodiment, the angle of adjacent stator detection tooth is that disclosure satisfy that will with the angle that stator yoke is crossed over
The minima asked.In above-described embodiment, the angle being separated by between adjacent stator detection tooth is equal, that is, be equally spaced, but
In the present invention, the angle being separated by between adjacent stator detection tooth might not be equal, that is, be not necessarily to be equally spaced.
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 anglec of rotation that can be detected by rotary transformer obtains the anglec of rotation of rotary body body.
5th embodiment：
In 5th embodiment, rotary body body is motor.Rotary transformer shares casing, rotary transformer with motor
Stator be arranged on rotary body body share casing on.The rotor core of rotary transformer is arranged on turning for rotary body body
On axle, rotate together with the rotor core of motor.In the present embodiment, rotary body is that rotary transformer is constituted with motor body
The integral motor of one.
Sixth embodiment：
In sixth embodiment, rotary body body is motor.Fig. 7 show the structural representation of rotary body in the present embodiment
Figure.In Fig. 7,601 represent rotary transformer, and 602 represent motor, and 603 represent motor rotary shaft, and 604 represent rotary transformer
Lead-out wire, 605 represent motor lead line, and 606 is screw.In the present embodiment, rotary transformer 601 is arranged on motor body
602 end, motor rotary shaft 603 is connected synchronous rotary with rotary transformer rotating shaft shaft coupling (not shown in Fig. 7).Thus
It can be seen that, in the present embodiment, rotary body is the split-type structural that rotary transformer is constituted with motor body.
In rotary transformer of the present invention and the rotary body with this rotary transformer, the stator yoke of rotary transformer institute across
Angle more is less than 360 degree, is greatly promoted miniaturization and the lightweight of rotary transformer, and can realize in each stator
At most around 1 coil on detection tooth, production technology is enormously simplify, effectively prevent and cause rotation because the position of winding is different
The concordance of transformator is adversely affected, and overcomes the short circuit in prior art on same stator detection tooth between different windings
Risk.Meanwhile, the lead-out wire of the rotary transformer only with a set of detection coil system can be reduced to only 4, reduce and connect
Line risk and the triviality installed, safeguard and debug.
The present invention decouples tooth and/or stator assist tooth by arranging stator, the mode for actively avoiding magnetic coupling from disturbing, significantly
The precision of rotary transformer is optimized, while improve its fast-response energy, the system structure of rotary transformer is simplified.This
Outward, two sets or more than two sets of detection coil system can be set on same stator, in use, can will be a set of
Or many set detection coil systems, in currently used detection coil system malfunctions, are switched to another as back-up system
Set detection coil system works on, and substantially increases the reliability of anglec of rotation detection；Two sets or many set detections can also be made
The coil system simultaneously operation detection anglec of rotation, 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 arrange two sets or more than two sets of detection coil system on a rotary transformer, compared to existing
There are many Rotary transformer systems with equal reliability in technology, the rotary transformer quantity of required setting is few, shared
Volume is few, and cost is substantially reduced, and further promotes miniaturization and the lightweight of rotary transformer；Compared to setting in prior art
Many Rotary transformer systems of equal number rotary transformer are put, when occupancy volume is identical, reliability is then greatly improved.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using this
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 through performing creative labour.Therefore, the invention is not restricted to enforcement here
Example, those skilled in the art's announcement of the invention, the improvement made without departing from scope and modification all should be
Within protection scope of the present invention.
Claims (12)
1. a kind of rotary transformer, including stator and rotor, it is characterised in that：Stator includes stator yoke and stator detection tooth, institute
State stator detection tooth to be arranged in the stator yoke；The angle that the stator yoke is crossed over is less than 360 degree；
Rotor includes rotor core, and the surface of rotor core is provided with rotor with salient pole；
The stator detection number of teeth is 4*K, and K is positive integer；Rotor with salient pole number is N, and N is positive integer；
When N is more than 1, N number of rotor with salient pole is uniformly distributed along the circumferential surface of the rotor；
The stator yoke and stator detection tooth are made up of permeability magnetic material；The rotor core is made up of permeability magnetic material；
At most around 1 coil on each described stator detection tooth；
The rotary transformer includes at least a set of detection coil system；Often cover detection coil system include it is multiple be wound on it is described fixed
Coil on son detection tooth, the inductance of the coil changes with the change of the anglec of rotation of the rotor, with according to the line
The anglec of rotation of rotor described in the change-detection of the inductance of circle.
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；Often cover the inspection
Test coil system had both included excitation wire, and comprising holding wire；
The fundamental phase of the combination inductance of the coil of each bridge arm differs successively 90 degree.
3. rotary transformer according to claim 2, it is characterised in that：In often covering the detection coil system：Including to
Few four groups of stator coils, every group of stator coil includes coil described at least one；Stator coil composition bridge-type electricity described in all groups
Road, every group of stator coil constitutes a bridge arm of the bridge circuit；In the bridge circuit, the intersecting bridge arm of each two is in phase
A contact is constituted at friendship, from junction each described a lead-out wire is drawn；
Preferably, in often covering the detection coil system：The quantity of stator coil interior loop described in each group is identical with distribution；
Preferably, often covering detection coil system includes four groups of stator coils, constitutes the bridge circuit of four bridge legs, connects with four
Point, from four junctions four lead-out wires are drawn, wherein two lead-out wires are excitation wire, two extractions in addition
Line is holding wire.
4. rotary transformer according to claim 1, it is characterised in that：The rotary transformer include two sets or two sets with
On detection coil system；The coil of at least two sets detection coil systems is arranged on same stator.
5. rotary transformer according to claim 1, it is characterised in that：Respectively cover between the detection coil system, excitation
Line is shared, holding wire independence；
Or, respectively cover between the detection coil system, excitation wire independence, holding wire independence.
6. rotary transformer according to claim 1, it is characterised in that：The shape of the rotor with salient pole is set, so that
The changing unit of the inductance of each coil is changing into sine wave change with the anglec of rotation of the rotor；
Or, the shape of the rotor with salient pole is set, so that the changing unit of the inductance of each coil is with described turn
The triangular wave that is changing into of the anglec of rotation of son changes.
7. rotary transformer according to claim 2, it is characterised in that：The stator detects tooth along the stator yoke more
Near the circumferential surface distribution of the side of the rotor, adjacent stator detection tooth is separated by the angle arrangement of setting, so that respectively
The fundamental phase of the combination inductance of the coil on the bridge arm differs successively 90 degree.
8. rotary transformer according to claim 1, it is characterised in that：The stator also includes stator assist tooth, to change
The symmetry of kind magnetic circuit system；The stator assist tooth is arranged on the outside that the stator detects tooth；The stator assist tooth
Material is permeability magnetic material.
9. rotary transformer according to claim 1, it is characterised in that：The stator also includes that stator decouples tooth, to subtract
The magnetic coupling being wound with less between the stator of coil detection tooth；The stator decoupling tooth is arranged on the stator for being wound with coil
The both sides of detection tooth, are wound between the stator of coil detection tooth at least provided with 1 stator decoupling tooth；The stator decouples tooth
Material be permeability magnetic material.
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.
11. a kind of rotary body 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；
Preferably, the rotary body body is motor；
Or, the rotary transformer is fixed on the end of the rotary body body；The rotating shaft of the rotary transformer with it is described
The rotating shaft of rotary body body connects 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；
Preferably, the rotary body body is motor.
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| CN201710116621.XA CN106655685A (en) | 2017-03-01 | 2017-03-01 | Rotary transformer and rotating body equipped with same |
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| CN201710116621.XA CN106655685A (en) | 2017-03-01 | 2017-03-01 | Rotary transformer and rotating body equipped with same |
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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 |
| CN107276323A (en) * | 2017-08-01 | 2017-10-20 | 上海世昱电子技术有限公司 | A kind of angle sensing device, rotary body and electric motor system |
| CN110081914A (en) * | 2018-01-25 | 2019-08-02 | 上海世昱电子技术有限公司 | A kind of rotation angle sensing device |
| CN110767429A (en) * | 2019-11-01 | 2020-02-07 | 北京动力机械研究所 | Novel reluctance type rotary transformer capable of running at high speed |
| CN112368921A (en) * | 2018-07-03 | 2021-02-12 | 三菱电机株式会社 | Resolver device and rotating electrical machine with resolver device |
| CN107276323B (en) * | 2017-08-01 | 2024-04-19 | 苏州昱泽智能科技有限公司 | Angle detection equipment, rotating body and motor system |
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| CN110767429B (en) * | 2019-11-01 | 2020-11-10 | 北京动力机械研究所 | Reluctance type rotary transformer capable of high-speed operation |
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