CN108731586A - Rotation angle detection apparatus, rotary angle sensing system and rotary body - Google Patents
Rotation angle detection apparatus, rotary angle sensing system and rotary body Download PDFInfo
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- CN108731586A CN108731586A CN201710255721.0A CN201710255721A CN108731586A CN 108731586 A CN108731586 A CN 108731586A CN 201710255721 A CN201710255721 A CN 201710255721A CN 108731586 A CN108731586 A CN 108731586A
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- rotor
- detection apparatus
- rotary body
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/245—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The present invention proposes rotation angle detection apparatus, rotary angle sensing system and rotary body.The rotation angle detection apparatus includes stator detection tooth, further includes multiple coils, and each coil is wound on stator detection tooth, at most around a coil on each stator detection tooth；Rotation angle detection apparatus includes at least a set of detection coil system, often covers more bridge arm bridge circuits that detection coil system includes at least 4 row parallel connections being made of multiple coils；A lead is drawn as signal wire from the contact of the upper and lower bridge arm of each column bridge arm；First signal voltage is generated by the differential signal of 2 signal leads therein, by the differential signal generation second signal voltage of other 2 signal wires, the phase difference of the first signal voltage and second signal voltage is the angle of setting, to detect the rotation angle of rotor.The present invention uses differential mode, and the influence of external interference in signals transmission can be substantially reduced in the longer application of signal wire.
Description
Technical field
The invention belongs to detection technique field, it is related to a kind of transformer and rotary body, especially rotation angle detection apparatus
And rotary body.
Background technology
The industries such as electric vehicle, industrial automation, robot, textile machine and aerospace be unable to do without electric rotating machine
High performance control, thus motor angular sensor is needed, and often require that its application under high temperature environment.
Currently, photo-electric angle encoder has obtained answering extensively because can easily realize the detection of motor rotation angle
With, but this photo-electric angle encoder contains photoelectric component and semiconductor devices, thus can not apply in the high temperature environment.
Rotary transformer is a kind of sensor that rotation angle detection may be implemented, since it does not use photoelectric converter
Part, thus can be used in the environment of higher temperature.
Existing inductance type rotary transformer has two excitation wires and two signal wires, and one is sinusoidal letter in two signal wires
Number, another is cosine signal.During long distance transmission, be easy by surrounding signal interference, make accuracy of detection by
Harmful effect may lead to not the rotation angle for normally measuring rotor in the case of especially surrounding is interfered strongly.
In current rotary transformer, it is wound with multigroup winding on stator detection tooth, is usually wound with three groups of windings so that it is manufactured
Technique is very complicated, and since the position difference of winding makes the consistency of rotary transformer be adversely affected；Simultaneously as
It is wound with multigroup winding on same stator detection tooth, in the production and use process, it is easy to occur due to vibratory impulse etc.
The problems such as winding short circuit and broken string, and then rotary transformer is caused to fail, reliability is poor.
Invention content
The purpose of the present invention is to provide the high rotation angle detection apparatus of a kind of measurement accuracy and reliability, rotation angles
Detecting system and rotary body.
In order to achieve the above object, solution of the invention is：
A kind of rotation angle detection apparatus, including stator and rotor, the stator include stator yoke and be located at the stator
Stator on yoke detects tooth；The rotor has rotor with salient pole；The stator yoke, stator detection tooth and the rotor with salient pole
Material be permeability magnetic material；The rotation angle detection apparatus further includes multiple coils, and each coil is wound on the stator
It detects on tooth, at most around a coil on each stator detection tooth, the inductance of each coil is with described turn
The variation of the rotation angle of son and change, for detecting the rotation angle of the rotor；The rotation angle detection apparatus packet
Include at least a set of detection coil system, often cover the detection coil system include by multiple coils form at least 4 row simultaneously
More bridge arm bridge circuits of connection, each column bridge arm include at least two bridge arms, and each bridge arm includes at least one coil；More bridges
Simultaneously two lead-out wires of interface extraction are equal from the contact of the upper and lower bridge arm of each column bridge arm as excitation wire by two of arm bridge circuit
A lead is drawn as signal wire；It is generated all the way with the rotor by the differential signal of 2 signal leads therein
First signal voltage of rotation angle variation generates another way with the rotor by the differential signal of other 2 signal wires
Rotation angle variation second signal voltage, the phase difference of the first signal voltage and second signal voltage be the angle set,
To detect the rotation angle of the rotor.
More bridge arm bridge circuits only include 4 row bridge arm in parallel；The rotation angle detection apparatus is encouraged containing 2 altogether
Magnet-wire and 4 signal wires.
It is 8*K that stator, which detects the number of teeth, and rotor with salient pole number is N；Wherein, K and N is positive integer；Preferably, K is equal to 1, N etc.
In 2.
All stator detection teeth for being wound with coil are in regular distribution along the circumference of the stator yoke, to ensure the first letter
The phase difference of number voltage and second signal voltage is 90 degree.
The stator further includes stator decoupling tooth, to reduce the magnetic coupling between being wound with the stator detection tooth of coil；
The both sides that tooth is detected in the stator for being wound with coil are arranged in stator decoupling tooth, be wound with coil stator detection tooth it
Between 1 stator decoupling tooth is at least set；The material of the stator decoupling tooth is permeability magnetic material.
The stator further includes stator assist tooth, to improve the symmetry of magnetic circuit system；The stator assist tooth setting exists
The outside of the stator detection tooth；The material of the stator assist tooth is permeability magnetic material.
The angle that the stator yoke is crossed over is less than 360 degree.
The rotation angle detection apparatus includes at least two sets of detection coil systems；At least two sets of detection coils
System is arranged on the same stator.
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
Rotation angle be changing into sine wave variation；Alternatively, the shape of the rotor with salient pole is set, so that each coil
The changing unit of inductance changes with the triangular wave that is changing into of the rotation angle of the rotor.
With stator cage, end cap, bearing and shaft；The stator includes stator core, and the stator core is mounted on
On the stator cage；The rotor includes rotor core, and the rotor core is mounted in the shaft, with entire described turn
Son rotates jointly.
The rotor is arranged in the inside of the stator；Alternatively, the rotor is arranged in the outside of the stator.
A kind of rotary angle sensing system of above-mentioned rotation angle detection apparatus, including at least two rotation angle inspections
Survey device；At least two rotation angle detection apparatus includes that the first rotation angle detection apparatus and the second rotation angle detect
Device；The rotor of first rotation angle detection apparatus only includes 1 rotor with salient pole；The rotor packet of second rotation angle detection apparatus
Include 2 or 2 or more rotor with salient pole；Turn of the rotor of first rotation angle detection apparatus and the second rotation angle detection apparatus
Son is set as rotating synchronously.
A kind of rotary body including aforementioned rotation angle detection apparatus, the rotary body include rotary body ontology and the rotation
Gyration detection device；The rotation angle of the rotation angle detection apparatus and the rotation angle of the rotary body ontology are at rule
Relationship, to detect the rotation angle of the rotary body ontology by the rotation angle detection apparatus.
The rotor core of the rotation angle detection apparatus is mounted in the shaft of the rotary body ontology, with the rotation
Body ontology rotates synchronously and forms integral structure, to detect the rotation angle of the rotary body ontology；The rotation angle inspection
The stator for surveying device is mounted on the stator cage shared with the rotary body ontology；Preferably, the rotary body ontology is electricity
Motivation；Alternatively, the rotation angle detection apparatus is fixed on the end of the rotary body ontology；The rotation angle detection apparatus
Shaft connect with the shaft of the rotary body ontology so that the rotation angle detection apparatus and the rotary body ontology are same
Shaft rotation is dynamic；Preferably, the shaft of the rotation angle detection apparatus is connect with the shaft of the rotary body ontology by shaft coupling；
Preferably, the rotary body ontology is motor.
A kind of rotary body of aforementioned rotary angle sensing system, the rotary body include rotary body ontology and the rotation angle
Spend detecting system；The rotation angle of the rotary angle sensing system and the rotation angle of the rotary body ontology are at regular pass
System, to detect the rotation angle of the rotary body ontology by the rotary angle sensing system.
Each rotor core of the rotary angle sensing system is mounted in the shaft of the rotary body ontology, with the rotation
It turns ontology to rotate synchronously and form integral structure, to detect the rotation angle of the rotary body ontology；The rotation angle
Each stator of detecting system is mounted on the casing shared with the rotary body ontology；Preferably, the rotary body ontology is electricity
Motivation；Alternatively, the rotary angle sensing system is fixed on the end of the rotary body ontology；The rotary angle sensing system
Shaft connect with the shaft of the rotary body ontology so that the rotary angle sensing system and the rotary body ontology are same
Shaft rotation is dynamic；Preferably, the shaft of the rotary angle sensing system is connect with the shaft of the rotary body ontology by shaft coupling；
Preferably, the rotary body ontology is motor.
By adopting the above scheme, the beneficial effects of the invention are as follows：The present invention uses difference side due to rotor-position signal
Formula can substantially reduce the influence of external interference in signals transmission in the longer application of signal wire.Meanwhile, it is capable to realize
Each stator detection tooth at most around 1 coil, enormously simplify production technology, effectively prevent due to winding position not
It is same that the consistency of rotation angle detection apparatus is adversely affected, and overcome on same stator detection tooth in the prior art
Short-circuit risks between different windings.
In the case where the angle that the stator yoke of rotation angle detection apparatus is crossed over is less than 360 degree, it is greatly promoted
The miniaturization and lightweight of rotation angle detection apparatus.Tooth and/or stator assist tooth are decoupled by the way that stator is arranged, actively avoids magnetic
The mode of coupled interference, greatly optimizes the precision of rotation angle detection apparatus, while improving its fast-response energy, simplifies
The system structure of rotation angle detection apparatus.
Two sets or two sets or more of detection coil system can be arranged in the present invention on a rotation angle detection apparatus, compare
In more Rotary transformer systems in the prior art with same reliability, the rotation angle detection apparatus quantity of required setting
Few, occupied volume is few, and cost substantially reduces；More rotations of the identical quantity rotary transformer of setting in compared with the prior art
Voltage transformer system, when occupancy volume is identical, reliability then greatly improves.
In the rotary angle sensing system of the present invention, at least two rotation angle detection apparatus are applied in combination, Neng Goushi
Now accurately obtain the absolute position of rotor.
The rotary body of the present invention equally has the advantages that above.
Description of the drawings
Fig. 1 is the schematic cross-section of the rotor of rotation angle detection apparatus in first embodiment of the invention；
Fig. 2 is the structural schematic diagram of rotation angle detection apparatus entirety in first embodiment of the invention；
Fig. 3 is the circuit diagram of more bridge arm bridge circuits in first embodiment of the invention；
Fig. 4 is the schematic cross-section of the rotor of rotation angle detection apparatus in second embodiment of the invention；
Fig. 5 is the schematic cross-section of the rotor of rotation angle detection apparatus in third embodiment of the invention；
Fig. 6 is the schematic cross-section of the rotor of rotation angle detection apparatus in fourth embodiment of the invention；
Fig. 7 a are the circuit diagram of the bridge circuit of bridge arm more than first in fourth embodiment of the invention；
Fig. 7 b are the circuit diagram of the bridge circuit of bridge arm more than second in fourth embodiment of the invention；
Fig. 8 a are the schematic cross-section of the rotor of the first rotation angle detection apparatus in fifth embodiment of the invention；
Fig. 8 b are the schematic cross-section of the rotor of the second rotation angle detection apparatus in fifth embodiment of the invention；
Fig. 9 a are the circuit diagram of the bridge circuit of bridge arm more than first in fifth embodiment of the invention；
Fig. 9 b are the circuit diagram of the bridge circuit of bridge arm more than second in fifth embodiment of the invention；
Figure 10 is the structural schematic diagram of rotary body in sixth embodiment of the invention；
Figure 11 is the structural schematic diagram of rotary body in seventh embodiment of the invention.
Specific implementation mode
The present invention will be further described with reference to the accompanying drawings.
The present invention proposes a kind of rotation angle detection apparatus, which includes stator and rotor, is determined
Attached bag includes stator yoke and the stator detection tooth in stator yoke；Rotor has rotor with salient pole.Stator yoke, stator detect tooth and turn
The material of sub- salient pole is permeability magnetic material.The rotation angle detection apparatus further includes multiple coils, and each coil is wound on stator detection
On tooth, at most around a coil on each stator detection tooth, the inductance of each coil with the variation of the rotation angle of rotor and
Variation, for detecting the rotation angle of rotor.
The rotation angle detection apparatus includes at least a set of detection coil system, and it includes by multiple often to cover detection coil system
More bridge arm bridge circuits of at least 4 row parallel connections of coil composition, each column bridge arm include at least two bridge arms, and each bridge arm includes extremely
A few coil.In more bridge arm bridge circuits, the upper and lower bridge arm of each column bridge arm includes at least one coil；More bridge arm bridge-type electricity
Simultaneously interface draws two lead-out wires as excitation wire to two of road, and 1 is drawn from the contact of the upper and lower bridge arm of each column bridge arm
Lead is as signal wire.It is generated all the way with the of the variation of the rotation angle of rotor by the differential signal of 2 signal leads therein
One signal voltage generates the second signal that another way changes with the rotation angle of rotor by the differential signal of other 2 signal wires
The phase difference of voltage, the first signal voltage and second signal voltage is the angle of setting, to detect the rotation angle of rotor.
It is 8*K that stator, which detects the number of teeth, and rotor with salient pole number is N；Wherein, K and N is positive integer.
Preferably, all stator detection teeth for being wound with coil are in regular distribution along the circumference of stator yoke, to ensure the first letter
The phase difference of number voltage and second signal voltage is 90 degree.
Preferably, stator further includes stator decoupling tooth (not coiling on stator decoupling tooth), and determining for coil is wound with to reduce
Magnetic coupling between son detection tooth.The both sides that tooth is detected in the stator for being wound with coil are arranged in stator decoupling tooth, are wound with determining for coil
1 stator decoupling tooth is at least set between son detection tooth.The material that stator decouples tooth is permeability magnetic material.
Preferably, stator further includes stator assist tooth (not coiling on stator assist tooth), to improve pair of magnetic circuit system
Title property.The outside that tooth is detected in one-piece stator is arranged in stator assist tooth；The material of stator assist tooth is permeability magnetic material.
In the present invention, the angle that stator yoke is crossed over can be less than 360 degree, to reduce volume and weight.
Preferably, which includes at least two sets of detection coil systems；At least two sets of detection coil systems
System is arranged on the same stator.
In the present invention, which has stator cage, end cap, bearing and shaft.Stator includes stator
Iron core, stator core are mounted on stator cage；Rotor includes rotor core, and rotor core is mounted in shaft, is turned with entire
Son rotates together with.
First embodiment：
In the embodiment, K=1, N=2 are taken, thus the stator detection number of teeth of the rotation angle detection apparatus is 8, rotor is convex
Number of poles is 2.Fig. 1 show the schematic cross-section of the rotor of the rotation angle detection apparatus.Stator includes stator core, rotor
Including rotor core.Stator core and rotor core are all made of silicon steel sheet and are stamped and formed out.In the present embodiment, 8 stators detect tooth
It is uniformly distributed along stator core；2 rotor with salient pole are uniformly distributed along the circumference of rotor core in its outer circle.
There is Insulated winding wire skeleton (not shown in figure 1) on each stator detection tooth.It is wound with 1 line on each stator detection tooth
Circle, 8 stators detect and share 8 coils circumferentially on teeth, and circumferentially distribution is followed successively by 8 stators detection teeth clockwise
1101,1102,1103,1104,1105,1106,1107,1108 (for the sake of the simplicity of attached drawing, not to whole in Fig. 1
Stator detection tooth is marked, several stators is only marked to detect tooth).The inductance of each coil with the rotation angle of rotor variation
And change.In the present embodiment, pass through Electromagnetic Simulation select rotor with salient pole shape so that the changing unit of the inductance of coil with turn
The rotation angle of son is in sinusoidal variations.In the present embodiment, the DC component of the inductance of each coil is equal, the base of the inductance of each coil
Wave amplitude is equal.
Fig. 2 show the structural schematic diagram of rotation angle detection apparatus entirety.The rotation angle detection apparatus includes fixed
Son 2, rotor 3, shaft 4, bearing 5, stator cage 6, the end cap 701 of both sides and 702, bearing chamber, six roots of sensation lead-out wire 801,802,
803,804,805,806.Rotor core is fixed in shaft 4, can be rotated together with shaft 4.Bearing 5 is mounted in shaft 4,
Bearing 5 rotates with supporting 3 smooth of rotor.Stator core is fixed in stator cage 6.Bearing chamber is arranged in rotation angle
It spends on the both sides end cap 701 and 702 of detection device, the outer ring of bearing 5 is mounted in the bearing chamber of two end caps 701 and 702, is protected
The center line for demonstrate,proving shaft 4 is consistent with the inner circle center line of stator 2.
In the present embodiment, which includes a set of detection coil system, the detection coil system packet altogether
Include 4 row being made of above-mentioned 8 coils more bridge arm bridge circuits in parallel, each column bridge arm includes two bridge arms, in each bridge arm
There are one coils for connection.In the present embodiment, 8 stator coils are divided into 8 groups.Every group of stator coil includes 1 coil；Each line
The inductance of circle is in sinusoidal variations with the rotation angle of rotor.8 groups of stator coils are connected into more bridge arm bridge circuits as shown in Figure 3.Fig. 3
In, bridge arm XACIt is made of the coil Y1 on stator detection tooth 1101, bridge arm XADBy the coil Y7 structures on stator detection tooth 1107
At bridge arm XAEIt is made of the coil Y2 on stator detection tooth 1102, bridge arm XAFBy the coil Y8 structures on stator detection tooth 1108
At bridge arm XBCIt is made of the coil Y3 on stator detection tooth 1103, bridge arm XBDBy the coil Y5 structures on stator detection tooth 1105
At bridge arm XBEIt is made of the coil Y4 on stator detection tooth 1104, bridge arm XBFBy the coil Y6 structures on stator detection tooth 1106
At.
6 contacts A, B, C, D, E, F of more bridge arm bridge circuits use 6 leads to draw as rotation angle and detect dress respectively
The lead-out wire 801,802,803,804,805,806 set, wherein lead-out wire 801 and 802 be excitation wire, lead-out wire 803,804,
805,806 be signal wire.
In the present embodiment, the principle that sine wave position signal generates is as follows：
Enable the inductance difference of the coil on stator detection tooth 1101,1102,1103,1104,1105,1106,1107,1108
For L101, L102, L103, L104, L105, L106, L107, L108.As seen from Figure 1, with the rotation angle of rotor
Variation, the gap between each stator detection tooth and rotor with salient pole change so that the inductance of each coil changes therewith, variation
Period is 2.The inductance of each coil with rotor rotation angle θ m1Variation can be expressed as：
L101=L105=L1+Lm1*sin(2θm1) formula (101)
L102=L106=L1+Lm1*sin(2θm1- 90) formula (102)
L103=L107=L1+Lm1*sin(2θm1- 180) formula (103)
L104=L108=L1+Lm1*sin(2θm1- 270) formula (104)
Wherein, L1 is the DC component of each inductance in the present embodiment；
Lm1For the fundamental voltage amplitude of each inductance in the present embodiment；
θm1For the rotation angle of rotor in the present embodiment.
The bridge circuit figure of reference Fig. 3,
Bridge arm XACInductance L_AC be：L_AC=L101 formulas (105)
Bridge arm XADInductance L_AD be：L_AD=L107 formulas (106)
Bridge arm XAEInductance L_AE be：L_AE=L102 formulas (107)
Bridge arm XAFInductance L_AF be：L_AF=L108 formulas (108)
Bridge arm XBCInductance L_BC be：L_BC=L103 formulas (109)
Bridge arm XBDInductance L_BD be：L_BD=L105 formulas (110)
Bridge arm XBEInductance L_BE be：L_BE=L104 formulas (111)
Bridge arm XBFInductance L_BF be：L_BF=L106 formulas (112)
It is easy to find out more bridge arm bridge circuits with reference to figure 3 and according to formula (101)-(112) by the simple computation of circuit
The output voltage of contact C, D, E, F be rotation angle θ m with rotor1Variation and the sinusoidal signal that changes, and contact C
Signal voltage and contact D signal voltage reverse phase, it is hereby achieved that the differential signal voltage between contact C and D, this difference
Signal voltage is the rotation angle θ m of rotor1Sinusoidal signal；The signal voltage of contact E and the signal voltage reverse phase of contact F, by
This can obtain the differential signal voltage between contact E and F, this differential signal voltage is the rotation angle θ m of rotor1Sine
Signal, and the phase of above-mentioned two groups of differential signals differs 90 degree each other, can access two groups of rotation angles about rotor
90 degree of phase difference sine voltage signal, this as seeks the basis signal needed for the rotation angle of rotor in the prior art,
Therefore these basis signals are sent to subsequently connect signal processing circuit or can be obtained rotor by simple computation
Rotation angle θ m1。
Since rotor-position signal uses differential mode, signal transmission can be substantially reduced in the longer application of signal wire
The influence of external interference in the process.Meanwhile the present embodiment can be realized on each stator detection tooth at most around 1 coil, greatly
Simplify production technology greatly, effectively prevent due to the position difference of winding make the consistency of rotation angle detection apparatus by
Adverse effect, and overcome the short-circuit risks on same stator detection tooth in the prior art between different windings.
Second embodiment：
In the embodiment, K=1, N=2 are taken, thus the stator detection number of teeth of the rotation angle detection apparatus is 8, rotor is convex
Number of poles is 2；In addition, in the rotation angle detection apparatus, 8 stators being set and decouple teeth, stator decouples on tooth not wound around coil,
The material that stator decouples tooth is permeability magnetic material.Fig. 4 show the schematic cross-section of the rotor of the rotation angle detection apparatus.It is fixed
Attached bag includes stator core, and rotor includes rotor core.Stator core and rotor core are all made of silicon steel sheet and are stamped and formed out.This implementation
In example, 8 stator detection teeth are distributed along stator core even circumferential；8 stator decoupling teeth are distributed along stator core even circumferential,
2 rotor with salient pole are uniformly distributed along the circumference of rotor core in its outer circle.In Fig. 4 a stator solution is marked with reference numeral 9
Coupling tooth.
There is Insulated winding wire skeleton (being not shown in Fig. 4) on each stator detection tooth.It is wound with 1 line on each stator detection tooth
Circle, 8 stators detect and share 8 coils circumferentially on teeth, and circumferentially distribution is followed successively by 8 stators detection teeth clockwise
2101,2102,2103,2104,2105,2106,2107,2108 (for the sake of the simplicity of attached drawing, not to whole in Fig. 4
Stator detection tooth is marked, several stators is only marked to detect tooth).The inductance of each coil with the rotation angle of rotor variation
And change.In the present embodiment, pass through Electromagnetic Simulation select rotor with salient pole shape so that the changing unit of the inductance of coil with turn
The rotation angle of son is in sinusoidal variations.In the present embodiment, the DC component of the inductance of each coil is equal, the base of the inductance of each coil
Wave amplitude is equal.
The structural schematic diagram of rotation angle detection apparatus entirety can refer to Fig. 2 in first embodiment.
In the present embodiment, which includes a set of detection coil system, which includes
By the more bridge arm bridge circuits for the 4 row parallel connections that above-mentioned 8 coils form.In the present embodiment, 8 stator coils are divided into 8 groups.Often
Group stator coil includes 1 coil；The inductance of each coil changes with the variation of the rotation angle of rotor.8 groups of stator coils
More bridge arm bridge circuits are connected into, the circuit diagram of more bridge arm bridge circuits can refer to Fig. 3 of first embodiment.At this point, bridge arm
XACIt is made of the coil Y1 on stator detection tooth 2101, bridge arm XADIt is made of the coil Y7 on stator detection tooth 2107, bridge arm XAE
It is made of the coil Y2 on stator detection tooth 2102, bridge arm XAFIt is made of the coil Y8 on stator detection tooth 2108, bridge arm XBCBy
Stator detects the coil Y3 on tooth 2103 and constitutes, bridge arm XBDIt is made of the coil Y5 on stator detection tooth 2105, bridge arm XBEBy fixed
Coil Y4 on son detection tooth 2104 is constituted, bridge arm XBFIt is made of the coil Y6 on stator detection tooth 2106.
6 contacts A, B, C, D, E, F of more bridge arm bridge circuits use 6 leads to draw as rotation angle and detect dress respectively
The lead-out wire 801,802,803,804,805,806 set, lead-out wire 801 and 802 be excitation wire, lead-out wire 803,804,805,
806 be signal wire.
In the present embodiment, the principle that sine wave position signal generates is as follows：
The setting that tooth and winding are detected by the above stator, is easy to find out according to the analysis method being identical with the first embodiment
Differential signal voltage between differential signal voltage between contact C and D and contact E and F is the change with the rotation angle of rotor
The sine voltage changed and changed, phase difference is 90 degree, this is as sought in the prior art needed for the rotation angle of rotor
Basis signal, therefore by these basis signals send to the signal processing circuit subsequently connected or pass through simple computation
Obtain the rotation angle θ m of rotor2。
Other than having the advantages that first embodiment, for the present embodiment since stator uses stator assist tooth, it is fixed to reduce
Magnetic coupling between son detection tooth influences, and test signal is improved.Stator decoupling tooth is arranged in the stator inspection for being wound with coil
The both sides for surveying tooth are wound between the stator detection tooth of coil and 1 stator decoupling tooth are at least arranged.
3rd embodiment：
In the embodiment, K=1, N=8 are taken, thus the stator detection number of teeth of the rotation angle detection apparatus is 8, rotor is convex
Number of poles is 8.Meanwhile 1 stator assist tooth is respectively set in two outsides that tooth is detected in one-piece stator, is not twined on stator assist tooth
The material of coiling, stator assist tooth is permeability magnetic material.In addition, in the present embodiment, the span of stator yoke is less than 360 degree.
Fig. 5 show the schematic cross-section of the rotor of the rotation angle detection apparatus.Stator includes stator core, rotor
Including rotor core.Stator core and rotor core are all made of silicon steel sheet and are stamped and formed out.In the present embodiment, 8 stators detect tooth
Along stator core circle distribution, angle is 11.25 degree between each stator detection tooth.First assist tooth 1001 detects tooth with stator
Angle between 3101 is 11.25 degree, and the angle between the second assist tooth 1002 and stator detection tooth 3108 is 11.25 degree；8
Rotor with salient pole is uniformly distributed along the circumference of rotor core in its outer circle.
There is Insulated winding wire skeleton (being not shown in Fig. 5) on each stator detection tooth.It is wound with 1 line on each stator detection tooth
Circle, shares 8 coils on 8 stators detection teeth, 8 stators detection teeth circumferentially clockwise distribution be followed successively by 3101,3102,
3103,3104,3105,3106,3107,3108 (for the sake of the simplicity of attached drawing, tooth is not detected to whole stators in Fig. 5
It is marked, several stators is only marked to detect tooth).The inductance of each coil changes with the variation of the rotation angle of rotor.This
In embodiment, pass through Electromagnetic Simulation select rotor with salient pole shape so that the changing unit of the inductance of coil with rotor rotation
Angle is in sinusoidal variations.In the present embodiment, the DC component of the inductance of each coil is equal, the fundamental voltage amplitude phase of the inductance of each coil
Deng.
The structural schematic diagram of rotation angle detection apparatus entirety can refer to Fig. 2 in first embodiment.
In the present embodiment, which includes a set of detection coil system, which includes
By the more bridge arm bridge circuits for the 4 row parallel connections that above-mentioned 8 coils form.In the present embodiment, 8 stator coils are divided into 8 groups.Often
Group stator coil includes 1 coil；The inductance of each coil changes with the variation of the rotation angle of rotor.8 groups of stator coils
More bridge arm bridge circuits are connected into, the circuit diagram of more bridge arm bridge circuits can refer to Fig. 3 of first embodiment.At this point, bridge arm
XACIt is made of the coil Y1 on stator detection tooth 3101, bridge arm XADIt is made of the coil Y7 on stator detection tooth 3107, bridge arm XAE
It is made of the coil Y2 on stator detection tooth 3102, bridge arm XAFIt is made of the coil Y8 on stator detection tooth 3108, bridge arm XBCBy
Stator detects the coil Y3 on tooth 3103 and constitutes, bridge arm XBDIt is made of the coil Y5 on stator detection tooth 3105, bridge arm XBEBy fixed
Coil Y4 on son detection tooth 3104 is constituted, bridge arm XBFIt is made of the coil Y6 on stator detection tooth 3106.
6 contacts A, B, C, D, E, F of more bridge arm bridge circuits use 6 leads to draw as rotation angle and detect dress respectively
The lead-out wire 801,802,803,804,805,806 set, wherein lead-out wire 801 and 802 be excitation wire, lead-out wire 803,804,
805,806 be signal wire.
In the present embodiment, the principle that sine wave position signal generates is as follows：
The setting that tooth and winding are detected by the above stator, is easy to find out according to the analysis method being identical with the first embodiment
Differential signal voltage between differential signal voltage between contact C and D and contact E and F is the change with the rotation angle of rotor
The sine voltage changed and changed, phase difference is 90 degree, this is as sought in the prior art needed for the rotation angle of rotor
Basis signal, therefore by these basis signals send to the signal processing circuit subsequently connected or pass through simple computation
Obtain the rotation angle θ m of rotor3。
Other than having the advantages that first embodiment, the present embodiment is not complete since the span of stator yoke is less than 360 degree
Whole circle, therefore the volume, weight and manufacturing cost of detecting system can be reduced.In addition, to also set up stator auxiliary for the present embodiment
Tooth is helped, that is, the stator tooth for being located at the not wound around coil in the outside of one-piece stator detection tooth is carried to improve the symmetry of magnetic circuit system
High measurement accuracy (if being not provided with stator assist tooth, the magnetic resistance meeting of the stator detection tooth of outermost stator detection tooth and inside
It is inconsistent, so that the fundamental voltage amplitude of the inductance of each stator detection tooth coil and DC component are inconsistent, to accuracy of detection
It adversely affects).
Fourth embodiment：
In the embodiment, K=2, N=4 are taken, thus the stator detection number of teeth of the rotation angle detection apparatus is 16, rotor
Salient pole number is 4.
Fig. 6 show the schematic cross-section of the rotor of the rotation angle detection apparatus in the present embodiment.Stator includes fixed
Sub- iron core, rotor include rotor core, and stator core and rotor core are all made of silicon steel sheet and are stamped and formed out.In the present embodiment, 16
A stator detection tooth is uniformly distributed along stator core inner surface；4 rotor with salient pole uniformly divide along the outer round surface of rotor core
Cloth.
There is Insulated winding wire skeleton (being not shown in Fig. 6) on each stator detection tooth.It is wound on each stator detection tooth and only
It is full of 1 coil, 16 coils are shared circumferentially on 16 stator detection teeth, 16 stator detection teeth are circumferentially clockwise
Distribution is followed successively by 4101,4102,4103,4104,4105,4106,4107,4108,4109,4110,4111,4112,4113,
4114,4115,4116 (for the sake of the simplicity of attached drawing, whole stator detection teeth is not marked in Fig. 6, is only marked
Several stators detect tooth).The inductance of each coil changes with the variation of the rotation angle of rotor.In the present embodiment, pass through electricity
The shape of magnetic emulation selection rotor with salient pole so that the changing unit of the inductance of coil is in sinusoidal variations with the rotation angle of rotor.
In the present 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, which includes two sets of detection coil systems, respectively the first detection line altogether
Circle system and the second detection coil system.First detection coil system include be wound on stator detection tooth 4101,4102,4103,
4104, the coil on 4105,4106,4107,4108, the second detection coil system include be wound on stator detection tooth 4109,4110,
4111, the coil on 4112,4113,4114,4115,4116, two sets of detection coil systems are belonging respectively to two independent rotations
Angle detection device detection coil system, two detection coil systems separately constitute the bridge circuit of bridge arm more than first, bridge more than second
Arm bridge circuit.Circuit diagram after the bridge circuit of bridge arm more than first, the connection of the bridge circuit of bridge arm more than second is respectively such as Fig. 7 a
Shown in Fig. 7 b.
Excitation signal of two leads as the first detection coil system is drawn by contact A1, B1, by contact C1, D1, E1,
F1 draws position signal line of four leads as the first detection coil system.
Excitation signal of two leads as the second detection coil system is drawn by contact A2, B2, by contact C2, D2, E2,
F2 draws position signal line of four leads as the second detection coil system.
In the present embodiment, the principle that sine wave position signal generates is as follows：
Enable the line on the first detection coil system detectio tooth 4101,4102,4103,4104,4105,4106,4107,4108
The inductance of circle is respectively L101, L102, L103, L104, L105, L106, L107, L108.As seen from Figure 6, with rotor
Rotation angle variation, the gap between each stator detection tooth and rotor with salient pole changes so that the inductance of each coil with
Variation, period of change 4.The inductance of each coil with rotor rotation angle θ m4Variation can be expressed as
L101=L105=L4+Lm4*sin(4θm4) formula (401)
L102=L106=L4+Lm4*sin(4θm4- 90) formula (402)
L103=L107=L4+Lm4*sin(4θm4- 180) formula (403)
L104=L108=L4+Lm4*sin(4θm4- 270) formula (404)
Wherein, L4 is the DC component of each inductance in the present embodiment；
Lm4For the fundamental voltage amplitude of each inductance in the present embodiment,
θm4For the rotation angle of rotor in the present embodiment.
The setting that tooth and winding are detected by the above stator, is easy to find out according to the analysis method being identical with the first embodiment
Differential signal voltage between differential signal voltage between contact C1 and D1 and contact E1 and F1 is the rotation angle with rotor
Variation and the sine voltage that changes, phase difference are 90 degree, this as seeks the rotation angle of rotor in the prior art
Required basis signal, therefore send these basis signals to subsequently connect signal processing circuit or pass through simple computation
It can be obtained the rotation angle θ m of rotor4。
Similarly, the second detection coil system detectio tooth 4109,4110,4111,4112,4113,4114,4115,4116 is enabled
On the inductance of coil be respectively L109, L110, L111, L112, L113, L114, L115, L116.As seen from Figure 6, with
The variation of the rotation angle of rotor, the gap between each stator detection tooth and rotor with salient pole changes so that each coil
Inductance changes therewith, period of change 4.The inductance of each coil with rotor rotation angle θ m4Variation can indicate respectively
For
L109=L113=L4+Lm4*sin(4θm4) formula (405)
L110=L114=L4+Lm4*sin(4θm4- 90) formula (406)
L111=L115=L4+Lm4*sin(4θm4- 180) formula (407)
L112=L116=L4+Lm4*sin(4θm4- 270) formula (408)
Wherein, L4 is the DC component of each inductance in the present embodiment；
Lm4For the fundamental voltage amplitude of each inductance in the present embodiment,
θm4For the rotation angle of rotor in the present embodiment.
The setting that tooth and winding are detected by the above stator, is easy to find out according to the analysis method being identical with the first embodiment
Differential signal voltage between differential signal voltage between contact C2 and D2 and contact E2 and F2 is the rotation angle with rotor
Variation and the sine voltage that changes, phase difference are 90 degree, this as seeks the rotation angle of rotor in the prior art
Required basis signal, therefore send these basis signals to subsequently connect signal processing circuit or pass through simple computation
It can be obtained the rotation angle θ m of rotor4。
It can be seen that other than having the advantages that first embodiment, two sets of inspections are arranged in the present embodiment on the same stator
Test coil system in use can be using a set of detection coil system as back-up system, in currently used detection line
It when circle system breaks down, is switched to another set of detection coil system and works on, substantially increase the rotation angle inspection of rotor
The reliability of survey；Two sets of detection coil systems can also be made to work at the same time detection rotation angle, testing result is compared, and also can
Enough greatly improve the reliability of testing result.Its compared with the prior art in same reliability more rotary transformer systems
System, the rotation angle detection apparatus quantity of required setting is few, and occupied volume is few, and cost substantially reduces；Compared to existing skill
More Rotary transformer systems of identical quantity rotary transformer are set in art, and when occupancy volume is identical, reliability then carries significantly
It is high.
In (including the various embodiments described above) of the invention, rotation angle detection apparatus may each be rotary transformer.
The invention also provides a kind of rotary angle sensing system, which includes at least two rotations
Angle detection device, these rotation angle detection apparatus can be the rotation angle detection apparatus described in the first theme of the invention.
Preferably, the rotor of one of rotation angle detection apparatus only includes 1 rotor with salient pole；One rotation angle inspection
The rotor for surveying device includes 2 or 2 or more rotor with salient pole；The rotor of at least the two rotation angle detection apparatus is set as
It rotates synchronously.
5th embodiment：
The embodiment is rotary angle sensing system, which includes two rotation angle detection dresses
It sets, i.e. the first rotation angle detection apparatus and the second rotation angle detection apparatus.
First rotation angle detection apparatus is the rotation angle detection apparatus of the first theme defined of the invention, and wherein K takes
The stator detection number of teeth of value 1, N values 1, therefore the first rotation angle detection apparatus is 8, and rotor with salient pole number is 1.Second rotation angle
It is the rotation angle detection apparatus of the first theme defined of the invention to spend detection device also, and it is 10 that wherein K values, which are 1, N values,
Therefore the stator detection number of teeth of the second rotation angle detection apparatus is 8, and rotor with salient pole number is 10.
Fig. 8 a are the schematic cross-section of the rotor of the first rotation angle detection apparatus in the present embodiment；Fig. 8 b are this implementation
The schematic cross-section of the rotor of second rotation angle detection apparatus in example.First rotation angle detection apparatus and the second rotation angle
It spends in detection device, stator includes stator core, and rotor includes rotor core, and stator core and rotor core are all made of silicon
Steel disc is stamped and formed out.8 stators of the first rotation angle detection apparatus and the second rotation angle detection apparatus detect tooth along place
Stator core inner surface be uniformly distributed；10 rotor with salient pole of the second rotation angle detection apparatus are detected along the second rotation angle
The excircle of the rotor core of device is uniformly distributed.
Each stator of first rotation angle detection apparatus and the second rotation angle detection apparatus detection tooth on have insulation around
Line skeleton (is not shown) in Fig. 8 a and Fig. 8 b.1 coil is wound with and is only full of on each stator detection tooth, and 8 stators detect tooth
On share 8 coils circumferentially.In first rotation angle detection apparatus, 8 stator detection teeth are circumferentially distributed clockwise
It is followed successively by 5101A, 5102A, 5103A, 5104A, and 5105A, 5106A, 5107A, 5108A (for the sake of the simplicity of attached drawing, Fig. 8 a
In whole stator detection teeth is not marked, only mark several stators to detect tooth).Second rotation angle detection apparatus
In, 8 stator detection teeth are circumferentially distributed and are followed successively by 5101B, 5102B, 5103B, 5104B clockwise, 5105B, 5106B,
5107B, 5108B (for the sake of the simplicity of attached drawing, are not marked whole stator detection teeth in Fig. 8 a, if only marking
Dry stator detects tooth).The inductance of each coil changes with the variation of the rotation angle of rotor.In the present embodiment, pass through electromagnetism
The shape of emulation selection rotor with salient pole so that the changing unit of the inductance of coil is in sinusoidal variations with the rotation angle of rotor.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, the first rotation angle detection apparatus includes a set of detection coil system, and the is known as in the present embodiment
One detection coil system.First detection coil system includes being wound on stator detection tooth 5101A, 5102A, 5103A, 5104A,
Coil on 5105A, 5106A, 5107A, 5108A.In the present embodiment, the second rotation angle detection apparatus includes a set of detection line
Circle system is known as the second detection coil system in the present embodiment.Second detection coil system includes being wound on stator detection tooth
5101B, 5102B, 5103B, 5104B, the coil on 5105B, 5106B, 5107B, 5108B.Above-mentioned two sets of detection coil systems
The independent rotation angle detection apparatus detection coil system being belonging respectively on two stators, two detection coil systems group respectively
At more bridge arm bridge circuits of the first rotation angle detection apparatus, more bridge arm bridge circuits of the second rotation angle detection apparatus,
The bridge circuit of bridge arm more than first and bridge arm bridge circuit more than second, the circuit diagram difference of the two are referred to as in the present embodiment
As shown in figures 9 a and 9b.
Excitation signal line of two leads as the first detection coil system is drawn by contact A1, B1, by contact C1, D1,
E1, F1 draw position signal line of four leads as the first detection coil system.
Excitation signal line of two leads as the second detection coil system is drawn by contact A2, B2, by contact C2, D2,
E2, F2 draw position signal line of four leads as the second detection coil system.
The setting that tooth and winding are detected by the stator of above first rotation angle detection apparatus, according to first embodiment
Identical analysis method is easy to find out the differential signal between the differential signal voltage between contact C1 and D1 and contact E1 and F1
Voltage is the sine voltage changed with the variation of the rotation angle of rotor, and phase difference is 90 degree, this is existing skill
The basis signal needed for the rotation angle of rotor is sought in art.Therefore, these basis signals are sent to the signal subsequently connected
Processing circuit or the rotation angle θ m that can be obtained rotor by simple computation5.Also, the period of this signal is 1, thus may be used
Obtain the absolute position of rotor.
The setting that tooth and winding are detected by the stator of above second rotation angle detection apparatus, according to first embodiment
Identical analysis method is easy to find out the differential signal between the differential signal voltage between contact C2 and D2 and contact E2 and F2
Voltage is the sine voltage changed with the variation of the rotation angle of rotor, and phase difference is 90 degree, this is existing skill
The basis signal needed for the rotation angle of rotor is sought in art.Therefore, these basis signals are sent to the signal subsequently connected
Processing circuit or the rotation angle θ m that can be obtained rotor by simple computation5.Also, the period of this signal is 10.
In second rotation angle detection apparatus, rotor often rotates 1 week, and the inductance of coil changes 10 periods, i.e. rotor is every
Turn 36 degree of position signals and change 1 period, thus being combined with the result of the first rotation angle detection apparatus can be used for segmenting survey
Section is tried, accuracy of detection is greatly improved.
Therefore, in the present embodiment the rotary angle sensing system in addition to rotation angle detection apparatus in first embodiment
The advantages of outside, be applied in combination with the second rotation angle detection apparatus by the first rotation angle detection apparatus and can also accurately be obtained
The absolute position of rotor.
In above-described embodiment, be respectively provided with the shape of rotor with salient pole so that the changing unit of the inductance of each coil with
The rotation angle of rotor is changing into sine wave variation.In the present invention, the shape of rotor with salient pole can also be set, so that often
The changing unit of the inductance of a coil changes with the triangular wave that is changing into of the rotation angle of rotor.In above-described embodiment, rotor
It is arranged in the inside of stator.In the present invention, rotor can also be arranged in the outside of stator.
In (including above-described embodiment) of the invention, rotation angle detection apparatus may each be rotary transformer.
The invention also provides a kind of rotary bodies with the rotation angle detection apparatus described in the first theme.The rotary body
Including rotary body ontology and above-mentioned rotation angle detection apparatus.Wherein, the rotation angle and rotary body of rotation angle detection apparatus
The rotation angle of ontology is at regular relationship, therefore the rotation angle that can be detected by rotation angle detection apparatus obtain rotary body
The rotation angle of ontology.
Sixth embodiment：
In sixth embodiment, rotary body ontology is motor.Figure 10 show the structural representation of rotary body in the present embodiment
Figure.In Figure 10,601 indicate the casing that rotation angle detection apparatus is shared with motor, and 602 indicate rotation angle detection apparatus
The stator 602 of stator, rotation angle detection apparatus is mounted on the casing 601 shared with rotary body ontology；603 indicate motor
Stator, 604 indicate rotation angle detection apparatus rotor core, 605 indicate motor rotor core, rotation angle detection
The rotor core 604 of device is rotated together with the rotor core 605 of motor, and 606 indicate shaft, rotation angle detection apparatus
Rotor core 604 is mounted on the rotor 606 of rotary body ontology, and 6071,6072 indicate front and rear cover respectively, and 608 indicate bearing,
Ensure the smooth rotation of rotor relative stator, 6091,6092,6093,6094,6095,6096 indicate rotation angle detection apparatus
Lead-out wire, 6091 and 6092 be excitation lead, and 6093,6094,6095,6096 be signal lead, and 6010 expression motor draw
Line, 6011 indicate rotation angle detection apparatus coil, and 6012 indicate motor winding.In the present embodiment, rotary body is rotation angle
The integral motor that degree detection device is integrally formed with motor body.
7th embodiment：
In 7th embodiment, rotary body ontology is motor.Figure 11 show the structural representation of rotary body in the present embodiment
Figure.In Figure 11,701 indicate rotation angle detection apparatus, and 702 indicate motor, and 703 indicate motor rotary shaft, and 704 indicate rotation
Angle detection device lead-out wire, 705 indicate motor lead line, and 706 be screw.In the present embodiment, rotation angle detection apparatus 701
Mounted on the end of motor body 702, motor rotary shaft 703 is synchronous with shaft coupling connection with rotation angle detection apparatus shaft
It rotates (being not shown in Figure 11).It can be seen that in the present embodiment, rotary body is rotation angle detection apparatus and motor body structure
At split structure.
In (including above-mentioned two embodiment) of the invention, rotation angle detection apparatus may each be rotary transformer.
In addition, the invention also provides a kind of rotary bodies with the rotary angle sensing system described in second theme.It should
Rotary body includes rotary body ontology and above-mentioned rotary angle sensing system.Wherein, the rotation angle of rotary angle sensing system with
The rotation angle of rotary body ontology is at regular relationship, therefore the rotation angle that can be detected by rotary angle sensing system obtain
The rotation angle of rotary body ontology.
8th embodiment：
In 8th embodiment, rotary body ontology is motor, and each rotor core of rotary angle sensing system is mounted on rotation
In the shaft for turning ontology, is rotated synchronously with rotary body ontology and form integral structure, to detect the rotation of rotary body ontology
Angle；Each stator of rotary angle sensing system is mounted on the casing shared with rotary body ontology.
9th embodiment：
Rotary body ontology is motor, and rotary angle sensing system is fixed on the end of rotary body ontology；Rotation angle is examined
The shaft of examining system is connect with the shaft of rotary body ontology so that rotary angle sensing system and rotary body ontology rotate coaxially；
The shaft of rotary angle sensing system is connect with the shaft of rotary body ontology by shaft coupling.
In (including above-mentioned two embodiment) of the invention, rotation angle detection apparatus may each be rotary transformer.
This hair can be understood and applied the above description of the embodiments is intended to facilitate 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 having to go through creative labor.Therefore, the present invention is not limited to implementations here
Example, those skilled in the art's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be
Within protection scope of the present invention.
Claims (16)
1. a kind of rotation angle detection apparatus, it is characterised in that：Including stator and rotor, the stator includes stator yoke and is located at
Stator in the stator yoke detects tooth；The rotor has rotor with salient pole；The stator yoke, stator detection tooth and described
The material of rotor with salient pole is permeability magnetic material；
The rotation angle detection apparatus further includes multiple coils, and each coil is wound on the stator detection tooth, Mei Gesuo
State on stator detection tooth at most around a coil, the inductance of each coil with the rotation angle of the rotor change
Change and change, for detecting the rotation angle of the rotor；
The rotation angle detection apparatus includes at least a set of detection coil system, and it includes by more often to cover the detection coil system
More bridge arm bridge circuits of at least 4 row parallel connections of a coil composition, each column bridge arm includes at least two bridge arms, each bridge arm
Including at least one coil；Two of more bridge arm bridge circuits and interface draw two lead-out wires as excitation wire, from
The contact of the upper and lower bridge arm of each column bridge arm draws a lead as signal wire；By the difference of 2 signal leads therein
Sub-signal generates the first signal voltage changed all the way with the rotation angle of the rotor, by the difference of other 2 signal wires
Sub-signal generates the second signal voltage that another way changes with the rotation angle of the rotor, the first signal voltage and second signal
The phase difference of voltage is the angle of setting, to detect the rotation angle of the rotor.
2. rotation angle detection apparatus according to claim 1, it is characterised in that：More bridge arm bridge circuits only include
4 row bridge arm in parallel；The rotation angle detection apparatus contains 2 excitation wires and 4 signal wires altogether.
3. rotation angle detection apparatus according to claim 1, it is characterised in that：It is 8*K that stator, which detects the number of teeth, and rotor is convex
Number of poles is N；Wherein, K and N is positive integer；
Preferably, K is equal to 1, N and is equal to 2.
4. rotation angle detection apparatus according to claim 1, it is characterised in that：All stator inspections for being wound with coil
It is in regular distribution that tooth, which is surveyed, along the circumference of the stator yoke, to ensure the phase difference of the first signal voltage and second signal voltage for 90
Degree.
5. rotation angle detection apparatus according to claim 1, it is characterised in that：The stator further includes stator decoupling
Tooth, to reduce the magnetic coupling between being wound with the stator detection tooth of coil；The stator decoupling tooth, which is arranged, is being wound with coil
The both sides of stator detection tooth are wound between the stator detection tooth of coil and 1 stator decoupling tooth are at least arranged；It is described fixed
The material of subsolution coupling tooth is permeability magnetic material.
6. rotation angle detection apparatus according to claim 1, it is characterised in that：The stator further includes stator auxiliary
Tooth, to improve the symmetry of magnetic circuit system；The outside that tooth is detected in the stator is arranged in the stator assist tooth；The stator is auxiliary
It is permeability magnetic material to help the material of tooth.
7. rotation angle detection apparatus according to claim 1, it is characterised in that：The angle that the stator yoke is crossed over is small
In 360 degree.
8. rotation angle detection apparatus according to claim 1, it is characterised in that：The rotation angle detection apparatus includes
At least two sets of detection coil systems；At least two sets of detection coil systems are arranged on the same stator.
9. rotation angle detection apparatus 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 changes with the sine wave that is changing into of the rotation angle of the rotor；
Alternatively, the shape of the rotor with salient pole is arranged, so that the changing unit of the inductance of each coil is with described turn
The rotation angle of son is changing into triangular wave variation.
10. rotation angle detection apparatus according to claim 1, it is characterised in that：With stator cage, end cap, bearing
And shaft；
The stator includes stator core, and the stator core is mounted on the stator cage；
The rotor includes rotor core, and the rotor core is mounted in the shaft, is rotated jointly with the entire rotor.
11. rotation angle detection apparatus according to claim 1, it is characterised in that：The rotor is arranged in the stator
Inside；
Alternatively, the rotor is arranged in the outside of the stator.
12. a kind of rotary angle sensing system including the rotation angle detection apparatus described in any one of claim 1 to 11,
It is characterized in that：Including at least two rotation angle detection apparatus；At least two rotation angle detection apparatus includes
First rotation angle detection apparatus and the second rotation angle detection apparatus；
The rotor of first rotation angle detection apparatus only includes 1 rotor with salient pole；
The rotor of second rotation angle detection apparatus includes 2 or 2 or more rotor with salient pole；
The rotor of the rotor of first rotation angle detection apparatus and the second rotation angle detection apparatus is set as rotating synchronously.
13. a kind of rotary body including the rotation angle detection apparatus described in any one of claim 1 to 11, feature exist
In：The rotary body includes rotary body ontology and the rotation angle detection apparatus；
The rotation angle of the rotation angle detection apparatus and the rotation angle of the rotary body ontology are at regular relationship, with logical
Cross the rotation angle that the rotation angle detection apparatus detects the rotary body ontology.
14. rotary body according to claim 13, it is characterised in that：The rotor core of the rotation angle detection apparatus is pacified
In the shaft of the rotary body ontology, is rotated synchronously with the rotary body ontology and form integral structure, to detect
State the rotation angle of rotary body ontology；The stator of the rotation angle detection apparatus be mounted on the rotary body ontology share
On stator cage；Preferably, the rotary body ontology is motor；
Alternatively, the rotation angle detection apparatus is fixed on the end of the rotary body ontology；The rotation angle detection apparatus
Shaft connect with the shaft of the rotary body ontology so that the rotation angle detection apparatus and the rotary body ontology are same
Shaft rotation is dynamic；Preferably, the shaft of the rotation angle detection apparatus is connect with the shaft of the rotary body ontology by shaft coupling；
Preferably, the rotary body ontology is motor.
15. a kind of rotary body including the rotary angle sensing system described in claim 12, it is characterised in that：The rotation
Body includes rotary body ontology and the rotary angle sensing system；
The rotation angle of the rotary angle sensing system and the rotation angle of the rotary body ontology are at regular relationship, with logical
Cross the rotation angle that the rotary angle sensing system detects the rotary body ontology.
16. rotary body according to claim 15, it is characterised in that：Each rotor core of the rotary angle sensing system
In the shaft of the rotary body ontology, integral structure is rotated synchronously and formed with the rotary body ontology, with detection
The rotation angle of the rotary body ontology；Each stator of the rotary angle sensing system is mounted on total with the rotary body ontology
On casing；Preferably, the rotary body ontology is motor；
Alternatively, the rotary angle sensing system is fixed on the end of the rotary body ontology；The rotary angle sensing system
Shaft connect with the shaft of the rotary body ontology so that the rotary angle sensing system and the rotary body ontology are same
Shaft rotation is dynamic；Preferably, the shaft of the rotary angle sensing system is connect with the shaft of the rotary body ontology by shaft coupling；
Preferably, the rotary body ontology is motor.
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| CN201710255721.0A CN108731586A (en) | 2017-04-19 | 2017-04-19 | Rotation angle detection apparatus, rotary angle sensing system and rotary body |
| PCT/CN2018/083490 WO2018192515A1 (en) | 2017-04-19 | 2018-04-18 | Device and system for measuring rotation angle, and rotator |
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| CN201710255721.0A CN108731586A (en) | 2017-04-19 | 2017-04-19 | Rotation angle detection apparatus, rotary angle sensing system and rotary body |
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| CN112327213A (en) * | 2020-10-19 | 2021-02-05 | 南京工程学院 | Electric revolving body performance detection system and detection method |
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| US8115479B2 (en) * | 2006-11-21 | 2012-02-14 | Hitachi Metals, Ltd. | Rotation-angle-detecting apparatus, rotating machine, and rotation-angle-detecting method |
| KR101426877B1 (en) * | 2008-02-07 | 2014-08-05 | 히타치 긴조쿠 가부시키가이샤 | Rotation angle detection device, rotary machine, and rotation angle detection method |
| JP5263024B2 (en) * | 2009-06-18 | 2013-08-14 | 株式会社日立製作所 | Rotation angle detection device and rotation speed detection device |
| JP5096442B2 (en) * | 2009-11-17 | 2012-12-12 | 株式会社日立製作所 | Rotation angle measuring device, motor system and electric power steering system |
| JP5218491B2 (en) * | 2010-07-29 | 2013-06-26 | 株式会社デンソー | Rotation angle detector |
| CN104165581B (en) * | 2014-07-25 | 2016-09-14 | 浙江大学 | Magnetic conductance formula absolute angle detection system |
| CN104165580B (en) * | 2014-07-25 | 2016-09-14 | 浙江大学 | A kind of magnetic conductance formula absolute angle detection system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112327213A (en) * | 2020-10-19 | 2021-02-05 | 南京工程学院 | Electric revolving body performance detection system and detection method |
| CN112327213B (en) * | 2020-10-19 | 2024-04-19 | 南京工程学院 | Electric revolving body performance detection system and detection method |
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| WO2018192515A1 (en) | 2018-10-25 |
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