CN106533108B - Resolver and rotating body having the same - Google Patents
Resolver and rotating body having the same Download PDFInfo
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- CN106533108B CN106533108B CN201611248159.0A CN201611248159A CN106533108B CN 106533108 B CN106533108 B CN 106533108B CN 201611248159 A CN201611248159 A CN 201611248159A CN 106533108 B CN106533108 B CN 106533108B
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Classifications
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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
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- 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
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- 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
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- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Power Engineering (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention provides a rotary transformer and a rotary body with the same, and belongs to the technical field of detection. The rotary transformer comprises a stator with stator detection teeth and a rotor with rotor salient poles, wherein the number of the stator detection teeth is 4 (K+1) S, and the number of the rotor salient poles is (K+1) S (2N-1); wherein K, S and N are both positive integers; at most 1 coil is wound on each stator detection tooth. The rotating body comprises a rotating body and the rotary transformer; the rotation angle of the resolver is in a regular relationship with the rotation angle of the rotor body to detect the rotation angle of the rotor by the resolver. The invention can realize that 1 group of coils are wound on each stator detection tooth at most, greatly simplifies the production process, effectively prevents the consistency of the rotary transformer from being adversely affected due to different positions of the windings, and overcomes the short circuit risk between different windings on the same stator detection tooth in the prior art.
Description
Technical Field
The invention belongs to the technical field of detection, and relates to a transformer and a rotating body, in particular to a rotary transformer and a rotating body.
Background
The industries such as electric automobiles, industrial automation, robots, textile machinery, aerospace and the like are all free from high-performance control of rotating motors, so that a motor rotation angle sensor is required, and the motor rotation angle sensor is often required to be applied to a high-temperature environment.
Currently, a photoelectric angle encoder is widely used because it can easily detect a rotation angle of a motor, but it cannot be used in a high temperature environment because it includes a photoelectric element and a semiconductor element.
A resolver is a sensor that can detect a rotation angle, and can be used in a high-temperature environment because it does not use a photoelectric conversion device. However, current rotary transformers suffer from a number of disadvantages: the stator detection teeth are wound with a plurality of groups of windings, and three groups of windings are usually wound, so that the manufacturing process is complex, and the consistency of the rotary transformer is adversely affected due to different positions of the windings; meanwhile, as a plurality of groups of windings are wound on the stator detection teeth, in the use process, the problems of winding short circuit, wire breakage and the like are easy to occur due to vibration impact and the like, and further the failure of the rotary transformer is caused, and the reliability is poor. In addition, the conventional rotary transformer comprises at least 6 outgoing lines, so that the fault risk of the connecting line is increased, and the installation, maintenance and debugging of the outgoing lines are complicated.
Disclosure of Invention
The present invention has been made in view of the above-described problems caused by the fact that the stator has a large number of windings and a large number of lead wires, and an object of the present invention is to provide a resolver and a rotating body having the resolver.
In order to achieve the above object, the solution of the present invention is:
A rotary transformer comprises a stator with stator detection teeth and a rotor with rotor salient poles, wherein the number of the stator detection teeth is 4 (K+1) S, and the number of the rotor salient poles is (K+1) S (2N-1); wherein K, S and N are both positive integers; at most 1 coil is wound on each stator detection tooth.
The rotary transformer comprises four groups of stator coils; each group of stator coils comprises at least one coil; each coil is wound on one stator detection tooth, and the inductance of each coil changes along with the change of the rotation angle of the rotor; the phase of the inductance of each coil in each group of stator coils is equal; the phases of the composite inductances of the four groups of stator coils are sequentially different by 90 degrees; four groups of stator coils form a bridge circuit; four outgoing lines are led out from four joints of the bridge circuit; two outgoing lines of the four outgoing lines are excitation lines, and the other two outgoing lines are signal lines.
The direct current components of the inductance of each coil are equal, and the fundamental wave amplitude of the inductance of each coil is equal; the positions of the coils on the stator detection teeth are the same; the stator coils in each group comprise the same number of coils, and the distribution of the coils in each group of stator coils is the same.
The number of the detection teeth of the stator is 8, and the number of the salient poles of the rotor is 2 x (2N-1).
Or the number of the detection teeth of the stator is 12, and the number of the salient poles of the rotor is 3 (2N-1); preferably, the number of teeth of the stator is 12, and the number of salient poles of the rotor is 9.
Or the number of teeth detected by the stator is 16, and the number of salient poles of the rotor is 4 (2N-1).
Or the number of teeth detected by the stator is 20, and the number of salient poles of the rotor is 5 (2N-1); preferably, the number of teeth of the stator is 20, and the number of salient poles of the rotor is 5.
Or the number of teeth detected by the stator is 24, and the number of salient poles of the rotor is 6 (2N-1).
Or the number of teeth detected by the stator is 28, and the number of salient poles of the rotor is 7 (2N-1).
Or the number of teeth detected by the stator is 32, and the number of salient poles of the rotor is 8 (2N-1); preferably, the number of teeth of the stator is 32, and the number of salient poles of the rotor is 8.
Setting the shape of the rotor salient pole so that the inductance of each coil changes into a sine wave with the change of the rotation angle of the rotor; or the shape of the rotor salient pole is set so that the inductance of each coil changes in a triangular wave shape with the change of the rotation angle of the rotor.
The rotary transformer is provided with a stator shell, an end cover, a bearing and a rotating shaft; the stator comprises a stator core, and the stator core is arranged on the stator shell; the rotor includes a rotor core mounted on the rotating shaft to rotate together with the entire rotor.
The stator further comprises stator decoupling teeth, and at least one stator decoupling tooth is arranged on two sides of each stator detection tooth wound with the coil; preferably, the material of the stator decoupling teeth is the same as the material of the stator detection teeth and the stator body; further preferably, the material is a magnetically permeable material. At this time, preferably, the number of teeth of the stator is 8, the number of decoupling teeth of the stator is 8, and the number of salient poles of the rotor is 10.
The rotor is arranged inside the stator; or the rotor is arranged outside the stator.
A rotary body having the above rotary transformer, the rotary body including a rotary body and the rotary transformer; the rotation angle of the resolver is in a regular relationship with the rotation angle of the rotator body to detect the rotation angle of the rotator by the resolver.
The rotor core of the rotary transformer is arranged on the rotating shaft of the rotating body, and synchronously rotates with the rotating body to form an integrated structure so as to detect the rotating angle of the rotating body; the stator of the rotary transformer is mounted on a housing common to the rotor body.
Or the rotary transformer is fixed at the end part of the rotary body; the rotating shaft of the rotary transformer is connected with the rotating shaft of the rotating body so that the rotary transformer and the rotating body coaxially rotate; preferably, the rotating shaft of the rotary transformer is connected with the rotating shaft of the rotating body through a coupling.
The rotating body is an electric motor
By adopting the scheme, the invention has the beneficial effects that: the rotary transformer and the rotary body with the rotary transformer detect the angle of the rotor by adopting the principle that the inductance of the stator coil changes along with the change of the angle of the rotor, and based on the matching of the stator detection tooth number and the rotor salient pole number, the invention can realize that at most 1 group of coils are wound on each stator detection tooth, thereby greatly simplifying the production process, effectively preventing the consistency of the rotary transformer from being adversely affected due to different positions of the windings, and overcoming the short circuit risk between different windings on the same stator detection tooth in the prior art. Meanwhile, the outgoing lines of the rotary transformer can be reduced to only 4, so that wiring risks and complexity of installation, maintenance and debugging are reduced.
Drawings
Fig. 1 is a schematic cross-sectional view of a stator and a rotor of a rotary transformer according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram showing a structure of a rotary transformer according to a first embodiment of the present invention;
FIG. 3 is a circuit diagram of a bridge circuit according to a first embodiment of the present invention;
Fig. 4 is a schematic cross-sectional view of a stator and a rotor of a rotary transformer according to a second embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a stator and a rotor of a rotary transformer according to a third embodiment of the present invention;
fig. 6 is a schematic cross-sectional view of a stator and a rotor of a rotary transformer according to a fourth embodiment of the present invention;
Fig. 7 is a schematic structural view of a rotary body having a rotary transformer in a fifth embodiment of the present invention;
fig. 8 is a schematic structural view of a rotary body having a resolver according to a sixth embodiment of the present invention.
In the accompanying drawings: 1101-1112, stator detection teeth; 2. a stator; 3. a rotor; 4. a rotating shaft; 5. a bearing; 6. a stator housing; 701-702, end covers; 801-804, leading-out wire; 9. a coil; 2101-2120, stator detection teeth; 3101 to 3132: stator detection teeth; 4101-4108, stator detection teeth; 501. a housing common to the resolver and the motor; 502. a stator of the rotary transformer; 503. a stator of the motor; 504. a rotor core of the rotary transformer; 505. a rotor core of the motor; 506. a rotating shaft; 5071-5072, end cover; 508. a bearing; 5091 to 5094, and a lead wire of a resolver; 5010. leads of the motor; 5011. a resolver coil; 5012. a motor coil; 601. a rotary transformer; 602. a motor; 603. a motor shaft; 604. a resolver lead; 605. a motor lead; 606. and (5) a screw.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings.
The invention relates to a rotary transformer, in particular a reluctance rotary transformer, comprising a stator and a rotor. The stator includes a stator core, a coil, lead wires, an insulator (particularly, an insulating frame), and the like. The stator core is made of soft magnetic materials, stator detection teeth are formed by slotting the stator core along the inner circumference, the coil is wound on the stator detection teeth, and an insulator is arranged between the coil and the stator core and is an insulating framework or a material with an insulating effect. The rotor includes a rotor core that rotates coaxially with the rotor. The rotor core is made of soft magnetic material, and the outer circumference of the rotor core is salient pole-shaped, so that the rotor includes rotor salient poles. In the invention, the number of stator detection teeth and rotor salient poles satisfies the following conditions: the stator detection tooth number is 4 (K+1) S, and the rotor salient pole number is (K+1) (2N-1) S; wherein K, S and N are both positive integers. At most 1 coil is wound on each stator detection tooth.
Thus, the resolver of the present invention can be simplified to include only four sets of stator coils at a minimum. Each group of stator coils comprises at least one coil; the inductance of each coil varies with the rotation angle of the rotor. The phase of the inductance of each coil in each group of stator coils is equal; the phases of the composite inductances of the four groups of stator coils are sequentially different by 90 degrees. Four groups of stator coils form a bridge circuit, and four outgoing lines are led out from four joints of the bridge circuit. Of the four lead wires, two lead wires are excitation wires, and the other two lead wires are signal wires.
In the rotary transformer, the direct current components of the inductances of all coils are equal, and the fundamental wave amplitudes of the inductances of all coils are equal; each coil is positioned at the same location on the stator sense teeth where it is located. The same number of coils are contained in each group of stator coils, and the distribution of the coils in each group of stator coils is the same.
Therefore, in the rotary transformer of the present application, the number of stator detection teeth can be set to 8, the number of rotor salient poles is 2 (2N-1), and each group of stator coils comprises 1 to 2 coils; the stator detection tooth number is 12, the rotor salient pole number is 3 x (2N-1), and each group of stator coils comprises 1 to 3 coils; the number of the stator detection teeth is 16, the number of rotor salient poles is 4 x (2N-1), and each group of stator coils comprises 1 to 4 coils; the number of the stator detection teeth is 20, the number of rotor salient poles is 5 x (2N-1), and each group of stator coils comprises 1 to 5 coils; optionally, setting the number of detection teeth of the stator to be 24, and the number of salient poles of the rotor to be 6 (2N-1), wherein each group of stator coils comprises 1 to 6 coils; optionally, setting the number of detection teeth of the stator to be 28, and the number of salient poles of the rotor to be 7 (2N-1), wherein each group of stator coils comprises 1 to 7 coils; the number of stator detection teeth is set to be 32, the number of rotor salient poles is 8 x (2N-1), and each group of stator coils comprises 1 to 8 coils. Of course, the number of stator detection teeth and the number of rotor salient poles of the rotary transformer of the present application can be matched according to the number, and other number matching can be selected, so long as the number of stator detection teeth is 4 (k+1) S, the number of rotor salient poles is (k+1) S (2N-1) S, and K, S and N are positive integers, which fall within the protection scope of the present application.
The resolver can be installed inside or outside various rotating bodies to detect the rotation angle of the rotating bodies. Such a rotating body may be an electric motor, a generator, and other rotating objects.
First embodiment:
In the first embodiment of the present invention, k=2, s=1, and n=2, and thus the stator detection tooth number of the resolver is 12, and the rotor salient pole number is 9. Fig. 1 is a schematic cross-sectional view of a stator and a rotor of the resolver. The stator includes a stator core, and the rotor includes a rotor core. The stator core and the rotor core are formed by stamping silicon steel sheets. In this embodiment, 12 stator detection teeth are uniformly distributed along the stator core; the 9 rotor salient poles are uniformly distributed on the outer circumference of the rotor core along the circumference of the rotor core.
Each stator sensing tooth has an insulated bobbin (not shown in fig. 1) thereon. Each stator detection tooth is wound with 1 coil, 12 coils are distributed on 12 stator detection teeth along the circumference, and the 12 stator detection teeth are sequentially 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109, 1110, 1111 and 1112 along the circumference in a clockwise distribution. The inductance of each coil varies with the rotation angle of the rotor. In this embodiment, the shape of the salient pole of the rotor is selected by electromagnetic simulation so that the variation portion of the inductance of the coil varies sinusoidally with the rotation angle of the rotor. In fig. 1, 9 denotes a coil.
Fig. 2 is a schematic diagram showing the structure of the whole rotary transformer. The rotary transformer comprises a stator 2, a rotor 3, a rotating shaft 4, a bearing 5, a stator casing 6, end covers 701 and 702 on two sides, a bearing chamber and four outgoing lines 801, 802, 803 and 804. The rotor core is fixed to the rotation shaft 4 and can rotate together with the rotation shaft 4. A bearing 5 is mounted on the rotation shaft 4, and the bearing 5 supports the rotor 3 to smoothly rotate. The stator core is mounted and fixed in the stator housing 6. Bearing chambers are provided on both side end caps 701 and 702 of the resolver, and an outer ring of the bearing 5 is installed in the bearing chambers of both end caps 701 and 702, ensuring that the center line of the rotating shaft 4 is identical to the center line of the inner circle of the stator 2. Of the four lead lines 801, 802, 803, 804, the lead lines 801 and 802 are excitation lines, and the lead lines 803 and 804 are signal lines.
In this embodiment, the stator coils are divided into 4 groups in total. Each group of stator coils comprises 3 coils; the inductance of each coil varies with the rotation angle of the rotor. The phase of the inductance of each coil in each group of stator coils is equal; the phases of the composite inductances of the four groups of stator coils are sequentially different by 90 degrees. Four groups of stator coils form a bridge circuit, and fig. 3 is a circuit diagram of the bridge circuit. In fig. 3, arm X AC of the bridge circuit is formed by the series connection of coils on stator sense teeth 1101, 1105, and 1109, arm X AD is formed by the series connection of coils on stator sense teeth 1102, 1106, and 1110, arm X BC is formed by the series connection of coils on stator sense teeth 1103, 1107, and 1111, and arm X BD is formed by the series connection of coils on stator sense teeth 1104, 1108, and 1112. The fundamental wave phases of the inductances in the same bridge arm are equal, 4 connection nodes A, B, C, D of the bridge circuit are respectively led out by 4 leads to be lead out wires 801, 802, 803 and 804 of the rotary transformer, wherein the lead out wires 801 and 802 are excitation wires, and the lead out wires 803 and 804 are signal wires.
In this embodiment, the sine wave position signal is generated according to the following principle:
the inductances of the coils on the stator detection teeth 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109, 1110, 1111, 1112 are L101, L102, L103, L104, L105, L106, L107, L108, L109, L110, L111, and L112, respectively. As can be seen from fig. 2, as the rotation angle of the rotor changes, the gap between each stator detecting tooth and the rotor salient pole changes, so that the inductance of each coil changes accordingly, and the period of the change is 9. For convenience of explanation, neglecting higher harmonics of the inductance, the variation of the inductance of each coil with the rotation angle θm 1 of the rotor can be expressed as
L101=l105=l109=l1+lm 1*sin(9θm1) formula (101)
L102=l106=l110=l1+lm 1*sin(9θm1 -90) formula (102)
L103=l107=l111=l1+lm 1*sin(9θm1 -180) formula (103)
L104=l108=l112=l1+lm 1*sin(9θm1 -270) formula (104)
Wherein L1 is the direct current component of each inductor;
lm 1 is the fundamental amplitude of each inductor,
Θm 1 is the rotation angle of the rotor.
Thus, the fundamental wave of the inductance of each coil was changed 9 times for every 1 revolution of the rotor.
Referring to the bridge circuit diagram of fig. 3, the inductance l_ac of leg X AC, which is made up of coils on stator sense teeth 1101, 1105, and 1109, is:
Lac=l101+l105+l109=3l1+3lm 1*sin(9θm1) formula (105)
The inductance l_ad of leg X AD, which is formed by the coils on stator sense teeth 1102, 1106, and 1110, is:
L_ad=l102+l106+l110=3l1+3lm 1*sin(9θm1 -90) formula (106)
The inductance l_bc of leg X BC, which is made up of coils on stator sense teeth 1103, 1107, and 1111, is:
L_bc=l103+l107+l111=3l1+3lm 1*sin(9θm1 -180) formula (107)
The inductance l_bd of leg X BD, which is formed by the coils on stator sense teeth 1104, 1108, and 1112, is:
L_bd=l104+l108+l112=3l1+3lm 1*sin(9θm1 -270) formula (108)
From equations (105) and (107), the difference l_acb between the inductances of bridge arm X AC and bridge arm X BC of the bridge circuit is:
l_acb=6lm 1*sin(9θm1) type (109)
From equations (106) and (108), the difference l_adb between the inductances of bridge arm X AD and bridge arm X BD of the bridge circuit is:
L_ADB=6Lm 1*sin(9θm1 -90) type (110)
From the observation of the formulas (109) and (110), l_acb and l_adb are sine waves with a phase difference of 90 degrees according to the change of the rotation angle of the rotor, so that it is shown that an output signal, typically a voltage signal, proportional to the output signal can be obtained, that is, a voltage signal with respect to the rotation angle of the rotor, which is respectively a sine change and a cosine change can be obtained, that is, a basic signal required for obtaining the rotation angle of the rotor in the prior art, and therefore, the basic signals are transmitted to a signal processing circuit connected subsequently or the rotation angle θm 1 of the rotor can be obtained through simple calculation.
Second embodiment:
In the second embodiment, K takes a value of 4, s and N each take a value of 1, so that the number of teeth of the stator detection of the resolver is 20, and the number of poles of the rotor is 5. Fig. 4 is a schematic cross-sectional view of the stator and rotor of the resolver according to the present embodiment. The stator includes a stator core, and the rotor includes a rotor core. The stator core and the rotor core are formed by stamping silicon steel sheets. In this embodiment, 20 stator detection teeth are uniformly distributed along the stator core; the 5 salient poles are uniformly distributed on the outer circumference of the rotor core along the circumference thereof.
Each tooth of the stator has an insulated bobbin (not shown in fig. 4). Each tooth of the stator is wound with 1 coil, 20 coils are distributed circumferentially on 20 teeth of the stator, the 20 teeth of the stator are sequentially distributed 2101、2102、2103、2104、2105、2106、2107、2108、2109、2110、2111、2112、2113、2114、2115、2116、2117、2118、2119、2120. circumferentially clockwise for simplicity of the drawing, and since the distribution and reference numerals of the stator detection teeth are regular, reference numerals of each stator detection tooth are not labeled one by one in fig. 4, and only a few examples are given. The inductance of each coil varies with the rotation angle of the rotor. In this embodiment, the shape of the salient pole of the rotor is selected by electromagnetic simulation so that the variation portion of the inductance of the coil varies sinusoidally with the rotation angle of the rotor.
In the present embodiment, the configuration of the resolver is similar to that of the first embodiment except for the above, and thus, these configurations can be referred to fig. 2 of the first embodiment.
In this embodiment, the stator coils are divided into 4 groups in total. Each group of stator coils comprises 5 coils; the inductance of each coil varies with the rotation angle of the rotor. The phase of the inductance of each coil in each group of stator coils is equal; the phases of the composite inductances of the four groups of stator coils are sequentially different by 90 degrees. The four groups of stator coils form a bridge circuit, and the circuit diagram of the bridge circuit can be represented by the circuit diagram of the bridge circuit shown in fig. 3 in the first embodiment. However, in this case, arm X AC of the bridge circuit is formed by the series connection of coils on stator detection teeth 2101, 2105, 2109, 2113, 2117, arm X AD is formed by the series connection of coils on stator detection teeth 2102, 2106, 2110, 2114, 2118, arm X BC is formed by the series connection of coils on stator detection teeth 2103, 2107, 2111, 2115, 2119, and arm X BD is formed by the series connection of coils on stator detection teeth 2104, 2108, 2112, 2116, 2120. The fundamental wave phases of the inductances in the same bridge arm are equal, 4 connection nodes A, B, C, D of the bridge circuit are respectively led out by 4 leads to be lead out wires 801, 802, 803 and 804 of the rotary transformer, wherein the lead out wires 801 and 802 are excitation wires, and the lead out wires 803 and 804 are signal wires.
In this embodiment, the sine wave position signal is generated according to the following principle:
As can be seen from fig. 4, the inductances of the coils on the stator detecting teeth 2101, 2102, 2103, 2104, 2105, 2106, 2107, 2108, 2109, 2110, 2111, 2112, 2113, 2114, 2115, 2116, 2117, 2118, 2119, 2120 are L201、L202、L203、L204、L205、L206、L207、L208、L209、L210、L211、L212、L213、L214、L215、L216、L217、L218、L219、L220., and as the rotation angle of the rotor changes, the gap between each stator detecting tooth and the rotor salient pole changes, so that the inductances of the coils change accordingly, and the period of change is 5. For convenience of explanation, neglecting higher harmonics of the inductance, the variation of the inductance of each coil with the rotation angle θm 2 of the rotor can be expressed as:
L201=l205=l209=l213=l217=l2+lm 2*sin(5θm2) formula (201)
L202=l206=l210=l214=l218=l2+lm 2*sin(5θm2 -90) of formula (202)
L203=l207=l211=l215=l219=l2+lm 2*sin(5θm2 -180) formula (203)
L204=l208=l212=l216=l220=l2+lm 2*sin(5θm2 -270) formula (204)
Wherein L2 is the direct current component of the inductor;
Lm 2 is the fundamental amplitude of the inductance,
Θm 2 is the rotation angle of the rotor.
Thus, the fundamental wave of the inductance of each coil changes 5 times every 1 revolution of the rotor.
Referring to the bridge circuit diagram of fig. 3, the inductance l_ac of the arm X AC constituted by the coils on the stator detection teeth 2101, 2105, 2109, 2113, 2117 is:
lac=l201+l205+l209+l213+l217=5l2+5lm 2*sin(5θm2) formula (205)
The inductance l_ad of arm X AD formed by the coils on stator sense teeth 2102, 2106, 2110, 2114, 2118 is:
L_ad=l202+l206+l210+l214+l218=5l2+5lm 2*sin(5θm2 -90) formula (206)
The inductance l_bc of the arm X BC formed by the coils on the stator sense teeth 2103, 2107, 2111, 2115, 2119 is:
lbc=l203+l207+l211+l215+l219=5l2+5lm 2*sin(5θm2 -180) of formula (207)
The inductance l_bd of the arm X BD formed by the coils on the stator sense teeth 2104, 2108, 2112, 2116, 2120 is:
L_bd=l204+l208+l212+l216+l220=5l2+5lm 2*sin(5θm2 -270) formula (208)
From equations (205) and (207), the difference l_acb between the inductances of bridge arm X AC and bridge arm X BC of the bridge circuit is:
L_acb=10lm 2*sin(5θm2) type (209)
From equations (206) and (208), the difference l_adb between the inductances of bridge arm X AD and bridge arm X BD of the bridge circuit is:
L_ADB=10Lm 2*sin(5θm2 -90) formula (210)
From the observation of the formulas (209) and (210), l_acb and l_adb are sine waves with a phase difference of 90 degrees according to the change of the rotation angle of the rotor, so that it is shown that an output signal, typically a voltage signal, proportional to the output signal can be obtained, that is, a voltage signal with respect to the rotation angle of the rotor, which is respectively a sine change and a cosine change can be obtained, that is, a basic signal required for obtaining the rotation angle of the rotor in the prior art, and therefore, the basic signals are transmitted to a signal processing circuit connected subsequently or the rotation angle θm 2 of the rotor can be obtained through simple calculation.
Third embodiment:
In the third embodiment, K takes a value of 7, and s and N each take a value of 1. Thus, the stator detection tooth number of the rotary transformer is 32, and the rotor salient pole number is 8. Fig. 5 is a schematic cross-sectional view of the stator and rotor of the resolver according to the present embodiment. The stator includes a stator core, and the rotor includes a rotor core. The stator core and the rotor core are formed by stamping silicon steel sheets. In this embodiment, 32 stator detection teeth are uniformly distributed along the stator core; the 8 rotor salient poles are uniformly distributed on the outer circumference of the rotor core along the circumference of the rotor core.
Each stator sensing tooth has an insulated bobbin (not shown in fig. 5) thereon. The circumferential clockwise distribution of the 32 stator detection teeth is 3101、3102、3103、3104、3105、3106、3107、3108、3109、3110、3111、3112、3113、3114、3115、3116、3117、3118、3119、3120、3121、3122、3123、3124、3125、3126、3127、3128、3129、3130、3131、3132. in turn for simplicity of the drawing, and since the distribution and reference numerals of the stator detection teeth are regular, the reference numerals of each stator detection tooth are not labeled one by one in fig. 5, to give just a few examples. Unlike the first and second embodiments, in this embodiment, not 1 coil is wound on each stator detecting tooth, but 1 coil is wound on some stator detecting teeth, and no coil is wound on some stator detecting teeth. Here, coils are wound only on the stator detection teeth 3101, 3102, 3103, 3104, 3109, 3110, 3111, 3112, 3117, 3118, 3119, 3120, 3125, 3126, 3127, 3128. The inductance of each coil varies with the rotation angle of the rotor. In this embodiment, the shape of the salient pole of the rotor is selected by electromagnetic simulation so that the variation portion of the inductance of the coil varies sinusoidally with the rotation angle of the rotor.
In the present embodiment, the configuration of the resolver is similar to the first and second embodiments in the portions other than the above, and therefore these configurations can be referred to fig. 2 of the first embodiment.
In this embodiment, the stator coils are divided into 4 groups in total. Each group of stator coils comprises 4 coils; the inductance of each coil varies with the rotation angle of the rotor. The phase of the inductance of each coil in each group of stator coils is equal; the phases of the composite inductances of the four groups of stator coils are sequentially different by 90 degrees. The four groups of stator coils form a bridge circuit, and the circuit diagram of the bridge circuit can be represented by the circuit diagram of the bridge circuit shown in fig. 3 in the first embodiment. However, in this case, arm X AC of the bridge circuit is formed by the series connection of coils on stator detection teeth 3101, 3109, 3117, 3125, arm X AD is formed by the series connection of coils on stator detection teeth 3102, 3110, 3118, 3126, arm X BC is formed by the series connection of coils on stator detection teeth 3103, 3111, 3119, 3127, and arm X BD is formed by the series connection of coils on stator detection teeth 3104, 3112, 3120, 3128. The fundamental wave phases of the inductances in the same bridge arm are equal, 4 connection nodes A, B, C, D of the bridge circuit are respectively led out by 4 leads to be lead out wires 801, 802, 803 and 804 of the rotary transformer, wherein the lead out wires 801 and 802 are excitation wires, and the lead out wires 803 and 804 are signal wires.
In this embodiment, the sine wave position signal is generated according to the following principle:
The inductances of the coils on the stator detection teeth 3101, 3102, 3103, 3104, 3109, 3110, 3111, 3112, 3117, 3118, 3119, 3120, 3125, 3126, 3127, 3128 are L301, L302, L303, L304, L309, L310, L311, L312, L317, L318, L319, L320, L325, L326, L327, L328, respectively. As can be seen from fig. 5, as the rotation angle of the rotor changes, the gap between each stator detecting tooth and the rotor salient pole changes, so that the inductance of each coil changes accordingly, and the period of the change is 8. For convenience of explanation, neglecting higher harmonics of the inductance, the variation of the inductance of each coil with the rotation angle θm 3 of the rotor can be expressed as:
L301=l309=l317=l325=l3+lm 3*sin(8θm3) of formula (301)
L302=l310=l318=l326=l3+lm 3*sin(8θm3 -90) of formula (302)
L303=l311=l319=l327=l3+lm 3*sin(8θm3 -180) formula (303)
L304=l312=l320=l328=l3+lm 3*sin(8θm3 -270) of formula (304)
Wherein L3 is the dc component of the inductor;
lm 3 is the fundamental amplitude of the inductance,
Θm 3 is the rotation angle of the rotor.
Thus, the fundamental wave of the inductance of each coil was changed 8 times for every 1 revolution of the rotor.
Referring to the bridge circuit diagram of fig. 3, the inductance l_ac of the arm X AC constituted by the coils on the stator detection teeth 3101, 3109, 3117, 3125 is:
lac=l301+l309+l317+l325=4l3+4lm 3*sin(8θm3) formula (305)
The inductance l_ad of leg X AD formed by the coils on stator sense teeth 3102, 3110, 3118, 3128 is:
L_ad=l302+l310+l318+l326=4l3+4lm 3*sin(8θm3 -90) formula (306)
The inductance l_bc of leg X BC formed by the coils on stator sense teeth 3103, 3111, 3119, 3127 is:
l_bc=l303+l311+l319+l327=4l3+4lm 3*sin(8θm3 -180) formula (307)
The inductance l_bd of leg X BD formed by the coils on stator sense teeth 3104, 3112, 3120, 3128 is:
L_bd=l304+l312+l320+l328=4l3+4lm 3*sin(8θm3 -270) (308)
From equations (305) and (307), the difference l_acb between the inductances of bridge arm X AC and bridge arm X BC of the bridge circuit is:
L_acb=8lm 3*sin(8θm3) type (309)
From equations (306) and (308), the difference l_adb between the inductances of bridge arm X AD and bridge arm X BD of the bridge circuit is:
L_ADB=8Lm 3*sin(8θm3 -90) type (310)
From the observation of the formulas (309) and (310), l_acb and l_adb are sine waves with a phase difference of 90 degrees according to the change of the rotation angle of the rotor, so that it is shown that an output signal, typically a voltage signal, proportional to the output signal can be obtained, that is, a voltage signal with respect to the rotation angle of the rotor, which is respectively a sine change and a cosine change, can be obtained, that is, a basic signal required for obtaining the rotation angle of the rotor in the prior art, and therefore, the basic signals are transmitted to a signal processing circuit connected subsequently or the rotation angle θm 3 of the rotor can be obtained through simple calculation.
Fourth embodiment:
in the fourth embodiment, the values of K and S are 1, and the value of n is 3, so that the stator detection tooth number of the resolver is 8, and the number of rotor salient poles is 10. In this embodiment, there are 8 stator decoupling teeth, one stator decoupling tooth being provided between each two stator detection teeth (in the present invention, when stator decoupling teeth are provided, at least one of the stator decoupling teeth is provided on both sides of each stator detection tooth wound with a coil). The material of the stator decoupling teeth is the same as the material of the stator detection teeth and the stator body, and the material is a magnetic conduction material.
Fig. 6 is a schematic cross-sectional view of the stator and rotor of the rotary transformer in the present embodiment. The stator includes a stator core, and the rotor includes a rotor core. The stator core and the rotor core are formed by stamping silicon steel sheets. In the embodiment, 8 stator detection teeth are uniformly distributed along the stator core; the 10 rotor salient poles are uniformly distributed on the outer circle of the rotor core along the circumference of the rotor core, and the 8 stator decoupling teeth are arranged among the stator detection teeth and uniformly distributed along the stator core.
Each stator sensing tooth has an insulated bobbin (not shown in fig. 6) thereon. Each stator detection tooth is wound with 1 coil, 8 coils are distributed on 8 stator detection teeth along the circumference, and the 8 stator detection teeth are sequentially 4101, 4102, 4103, 4104, 4105, 4106, 4107 and 4108 along the circumference in a clockwise distribution. For simplicity of the drawing, and since the distribution and reference numerals of the stator detecting teeth are regular, reference numerals of the respective stator detecting teeth are not labeled one by one in fig. 6, and only two examples are given. The inductance of each coil varies with the rotation angle of the rotor. In this embodiment, the shape of the salient pole of the rotor is selected by electromagnetic simulation so that the variation portion of the inductance of the coil varies sinusoidally with the rotation angle of the rotor. In fig. 6, 10 denotes a stator decoupling tooth.
In the present embodiment, the configuration of the resolver is similar to that of the first embodiment except for the above, and thus, these configurations can be referred to fig. 2 of the first embodiment.
In this embodiment, the stator coils are divided into 4 groups in total. Each group of stator coils comprises 2 coils; the inductance of each coil varies with the rotation angle of the rotor. The phase of the inductance of each coil in each group of stator coils is equal; the phases of the composite inductances of the four groups of stator coils are sequentially different by 90 degrees. The four groups of stator coils form a bridge circuit, and the circuit diagram of the bridge circuit can be represented by the bridge circuit diagram shown in fig. 3 in the first embodiment. However, in this case, arm X AC of the bridge circuit is formed by the series connection of coils on stator detection teeth 4101, 4105, arm X AD is formed by the series connection of coils on stator detection teeth 4102, 4106, arm X BC is formed by the series connection of coils on stator detection teeth 4103, 4107, and arm X BD is formed by the series connection of coils on stator detection teeth 4104, 4108. The fundamental wave phases of the inductances in the same bridge arm are equal, 4 connection nodes A, B, C, D of the bridge circuit are respectively led out by 4 leads to be lead out wires 801, 802, 803 and 804 of the rotary transformer, wherein the lead out wires 801 and 802 are excitation wires, and the lead out wires 803 and 804 are signal wires.
In this embodiment, the sine wave position signal is generated according to the following principle:
The inductances of the coils on the stator detection teeth 4101, 4102, 4103, 4104, 4105, 4106, 4107, 4108 are L401, L402, L403, L404, L405, L406, L407, L408, respectively. As can be seen from fig. 6, as the rotation angle of the rotor changes, the gap between each stator detecting tooth and the rotor salient pole changes, so that the inductance of each coil changes accordingly, and the period of the change is 10. For convenience of explanation, neglecting higher harmonics of the inductance, the variation of the inductance of each coil with the rotation angle θm 4 of the rotor can be expressed as:
L401=l405=l4+lm 4*sin(10θm4) formula (401)
L402=l406=l4+lm 4*sin(10θm4 -90) of formula (402)
L403=l407=l4+lm 4*sin(10θm4 -180) formula (403)
L404=l408=l4+lm 4*sin(10θm4 -270) formula (404)
Wherein L4 is the direct current component of each inductor;
Lm 4 is the fundamental amplitude of each inductor,
Θm 4 is the rotation angle of the rotor.
Thus, the fundamental wave of the inductance of each coil changes 10 times every 1 revolution of the rotor.
Referring to the bridge circuit diagram of fig. 3, the inductance l_ac of the arm X AC constituted by the coils on the stator sense teeth 4101, 4105 is:
L_ac=l401+l405=2l4+2lm 4*sin(10θm4) formula (405)
The inductance l_ad of the arm X AD formed by the coils on the stator sense teeth 4102, 4106 is:
l_ad=l402+l406=2l4+2lm 4*sin(10θm4 -90) formula (406)
The inductance l_bc of the arm X BC formed by the coils on the stator detection teeth 4103, 4107 is:
l_bc=l403+l407=2l4+2lm 4*sin(10θm4 -180) formula (407)
The inductance l_bd of the arm X BD formed by the coils on the stator detection teeth 4104, 4108 is:
l_bd=l404+l408=2l4+2lm 4*sin(1θm4 -270) formula (408)
From equations (405) and (407), the difference l_acb between the inductances of bridge arm X AC and bridge arm X BC of the bridge circuit is:
L_acb=4lm 4*sin(10θm4) type (409)
From equations (406) and (108), the difference l_adb between the inductances of bridge arm X AD and bridge arm X BD of the bridge circuit is:
L_ADB=4Lm 4*sin(10θm4 -90) type (410)
From the observation of the formulas (409) and (410), l_acb and l_adb are sine waves with a phase difference of 90 degrees according to the change of the rotation angle of the rotor, so that it is shown that an output signal, typically a voltage signal, proportional to the output signal can be obtained, that is, a voltage signal with respect to the rotation angle of the rotor, which is respectively a sine change and a cosine change can be obtained, that is, a basic signal required for obtaining the rotation angle of the rotor in the prior art, and therefore, the basic signals are transmitted to a signal processing circuit connected subsequently or the rotation angle θm 4 of the rotor can be obtained through simple calculation.
In this embodiment, the stator decoupling teeth are arranged between two stator detection teeth, in particular in a position in the middle between the two stator detection teeth. Because the stator decoupling teeth are arranged, the voltage value actually measured is closer to the voltage value corresponding to the inductance value theoretically calculated in the above formulas, so that the precision of the finally detected rotation angle is greatly improved; meanwhile, the arrangement of the stator auxiliary teeth greatly improves the response speed of the rotary transformer and simplifies the system structure of the rotary transformer.
In the above embodiments, the shapes of the rotor salient poles are all set so that the changing portion of the inductance of the coil varies sinusoidally with the rotation angle of the rotor, and in the present invention, the shapes of the rotor salient poles may also be set so that the changing portion of the inductance of the coil varies in a triangular wave with the rotation angle of the rotor.
In the above embodiments, since the difference between the embodiments is large and the distribution of the stator detecting teeth is large, the marks of the stator detecting teeth between the embodiments are distinguished, and the marks of the other corresponding components are the same.
In the above embodiments, the rotors are all arranged inside the stator; in the present invention, the rotor may also be arranged outside the stator.
The invention also provides a rotating body with the rotary transformer. The rotating body comprises a rotating body and the rotary transformer. The rotation angle of the rotary transformer is in a regular relation with the rotation angle of the rotary body, so that the rotation angle of the rotary body can be obtained from the angle detected by the rotary transformer.
Fifth embodiment:
In a fifth embodiment, the rotating body is an electric motor. Fig. 7 is a schematic view showing the structure of a rotator in the present embodiment. In fig. 7, 501 denotes a casing common to a resolver and a motor, 502 denotes a stator of the resolver, 503 denotes a stator of the motor, 504 denotes a rotor core of the resolver, 505 denotes a rotor core of the motor, the rotor core 504 of the resolver rotates together with the rotor core 505 of the motor, 506 denotes a rotation shaft, 5071, 5072 denote front and rear end caps, 508 denote bearings, respectively, ensuring smooth rotation of the rotor with respect to the stator, 5091, 5092, 5093, 5094 denote lead wires of the resolver, 5091 and 5092 are excitation leads, 5093 and 5094 are signal leads, 5010 denotes a lead wire of the motor, 5011 denotes a resolver coil, and 5012 denotes a motor coil. In this embodiment, the rotating body is an integrated motor in which the resolver and the motor body are integrated.
Sixth embodiment:
In a sixth embodiment, the rotating body is an electric motor. Fig. 8 is a schematic view showing the structure of a rotator in the present embodiment. In fig. 8, 601 denotes a resolver, 602 denotes a motor, 603 denotes a motor shaft, 604 denotes a resolver lead, 605 denotes a motor lead, and 606 is a screw. In this embodiment, a resolver 601 is mounted on an end of a motor body 602, and a motor shaft 603 and the resolver shaft are synchronously rotated by a coupling connection (not shown in fig. 8). In this way, in the present embodiment, the rotary body is a split structure formed by the rotary transformer and the motor body.
The rotary transformer and the rotary body with the rotary transformer detect the angle of the rotor by adopting the principle that the inductance of the stator coil changes along with the change of the angle of the rotor, and based on the matching of the stator detection tooth number and the rotor salient pole number, the invention can realize that at most 1 group of coils are wound on each stator detection tooth, thereby greatly simplifying the production process, effectively preventing the consistency of the rotary transformer from being adversely affected due to different positions of the windings, and overcoming the short circuit risk between different windings on the same stator detection tooth in the prior art. Meanwhile, the outgoing lines of the rotary transformer can be reduced to only 4, so that the risk of miswiring and the complexity of installation, maintenance and debugging are reduced.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (9)
1. A rotary transformer comprising a stator having stator sense teeth and a rotor having rotor salient poles, characterized in that: the stator detection tooth number is 4 (K+1) S, and the rotor salient pole number is (K+1) (2N-1) S;
Wherein K, S and N are both positive integers;
at most 1 coil is wound on each stator detection tooth;
the rotary transformer comprises four groups of stator coils; each group of stator coils comprises at least one coil; each coil is wound on one stator detection tooth, and the inductance of each coil changes along with the change of the rotation angle of the rotor;
the phase of the inductance of each coil in each group of stator coils is equal;
The phases of the composite inductances of the four groups of stator coils are sequentially different by 90 degrees;
four groups of stator coils form a bridge circuit; four outgoing lines are led out from four joints of the bridge circuit;
two outgoing lines of the four outgoing lines are excitation lines, and the other two outgoing lines are signal lines;
The direct current components of the inductance of each coil are equal, and the fundamental wave amplitude of the inductance of each coil is equal; the positions of the coils on the stator detection teeth are the same; each group of stator coils comprises the same number of coils, and the coils in each group of stator coils are distributed identically;
K is 7, S and N are 1, so that the stator detection tooth number of the rotary transformer is 32, the number of rotor salient poles is 8, and the 32 stator detection teeth are uniformly distributed along the stator core; the 8 rotor salient poles are uniformly distributed on the outer circle of the rotor core along the circumference of the rotor core; the 32 stator detection teeth are distributed clockwise along the circumference, and the 3101、3102、3103、3104、3105、3106、3107、3108、3109、3110、3111、3112、3113、3114、3115、3116、3117、3118、3119、3120、3121、3122、3123、3124、3125、3126、3127、3128、3129、3130、3131、3132; is sequentially wound on the stator detection teeth 3101, 3102, 3103, 3104, 3109, 3110, 3111, 3112, 3117, 3118, 3119, 3120, 3125, 3126, 3127, 3128;
The stator coils are divided into 4 groups, and each group of stator coils comprises 4 coils; four groups of stator coils form a bridge circuit, wherein a bridge arm X AC of the bridge circuit is formed by serially connecting coils on stator detection teeth 3101, 3109, 3117 and 3125, a bridge arm X AD is formed by serially connecting coils on stator detection teeth 3102, 3110, 3118 and 3126, a bridge arm X BC is formed by serially connecting coils on stator detection teeth 3103, 3111, 3119 and 3127, a bridge arm X BD is formed by serially connecting coils on stator detection teeth 3104, 3112, 3120 and 3128, fundamental phases of inductances in the same bridge arm are equal, 4 connection nodes A, B, C, D of the bridge circuit are respectively led out by 4 leads to serve as lead wires 801, 802, 803 and 804 of the rotary transformer, wherein the lead wires 801 and 802 are excitation wires, and the lead wires 803 and 804 are signal wires;
The inductances of the coils on the stator detection teeth 3101, 3102, 3103, 3104, 3109, 3110, 3111, 3112, 3117, 3118, 3119, 3120, 3125, 3126, 3127, 3128 are L301, L302, L303, L304, L309, L310, L311, L312, L317, L318, L319, L320, L325, L326, L327, L328, respectively;
For convenience of explanation, neglecting higher harmonics of the inductance, the change of the inductance of each coil along with the rotation angle θm 3 of the rotor is expressed as:
L301=l309=l317=l325=l3+lm 3*sin(8θm3) of formula (301)
L302=l310=l318=l326=l3+lm 3*sin(8θm3 -90) of formula (302)
L303=l311=l319=l327=l3+lm 3*sin(8θm3 -180) formula (303)
L304=l312=l320=l328=l3+lm 3*sin(8θm3 -270) of formula (304)
Wherein L3 is the dc component of the inductor;
lm 3 is the fundamental amplitude of the inductance,
Θm 3 is the rotation angle of the rotor;
thus, every 1 revolution of the rotor, the fundamental wave of the inductance of each coil changes 8 times;
The inductance l_ac of leg X AC formed by the coils on stator sense teeth 3101, 3109, 3117, 3125 is:
Lac=l301+l309+l317+l325=4l3+4lm 3*sin(8θm3) formula (305)
The inductance l_ad of leg X AD formed by the coils on stator sense teeth 3102, 3110, 3118, 3128 is:
L_ad=l302+l310+l318+l326=4l3+4lm 3*sin(8θm3 -90) formula (306)
The inductance l_bc of leg X BC formed by the coils on stator sense teeth 3103, 3111, 3119, 3127 is:
l_bc=l303+l311+l319+l327=4l3+4lm 3*sin(8θm3 -180) formula (307)
The inductance l_bd of leg X BD formed by the coils on stator sense teeth 3104, 3112, 3120, 3128 is:
l_bd=l304+l312+l320+l328=4l3+4lm 3*sin(8θm3 -270) (308)
From equations (305) and (307), the difference l_acb between the inductances of bridge arm X AC and bridge arm X BC of the bridge circuit is:
l_acb=8lm 3 *sin(8θm3) type (309)
From equations (306) and (308), the difference l_adb between the inductances of bridge arm X AD and bridge arm X BD of the bridge circuit is:
L_ADB=8Lm 3 *sin(8θm3 -90) type (310)
As can be seen from the equations (309) and (310), l_acb and l_adb are sine waves having a phase difference of 90 degrees according to the change of the rotation angle of the rotor, and can obtain voltage signals having a sine change and a cosine change with respect to the rotation angle of the rotor, and the voltage signals are transmitted to a signal processing circuit connected subsequently or simply calculated to obtain the rotation angle θm 3 of the rotor.
2. A resolver according to claim 1, characterized in that: setting the shape of the rotor salient pole so that the inductance of each coil changes into a sine wave with the change of the rotation angle of the rotor;
or the shape of the rotor salient pole is set so that the inductance of each coil changes in a triangular wave shape with the change of the rotation angle of the rotor.
3. A resolver according to claim 1, characterized in that: the stator comprises a stator shell, an end cover, a bearing and a rotating shaft;
the stator comprises a stator core, and the stator core is arranged on the stator shell;
The rotor includes a rotor core mounted on the rotating shaft to rotate together with the entire rotor.
4. A resolver according to claim 1, characterized in that: the stator further comprises stator decoupling teeth; at least one stator decoupling tooth is arranged on two sides of each stator detection tooth wound with a coil;
the material of the stator decoupling teeth is the same as the material of the stator detection teeth and the stator body; the material is a magnetic conductive material.
5. A resolver according to claim 1, characterized in that: the rotor is arranged inside the stator;
Or the rotor is arranged outside the stator.
6. A rotating body having the resolver according to any one of claims 1 to 5, characterized in that: the rotating body includes a rotating body and the resolver;
The rotation angle of the resolver is in a regular relationship with the rotation angle of the rotator body to detect the rotation angle of the rotator by the resolver.
7. The rotating body according to claim 6, characterized in that: the rotor core of the rotary transformer is arranged on the rotating shaft of the rotating body, and synchronously rotates with the rotating body to form an integrated structure so as to detect the rotating angle of the rotating body;
the stator of the rotary transformer is mounted on a housing common to the rotor body.
8. The rotating body according to claim 6, characterized in that: the rotary transformer is fixed at the end part of the rotary body; the rotating shaft of the rotary transformer is connected with the rotating shaft of the rotating body so that the rotary transformer and the rotating body coaxially rotate;
The rotating shaft of the rotary transformer is connected with the rotating shaft of the rotating body through a coupling.
9. The rotating body according to any one of claims 6 to 8, characterized in that: the rotator body is a motor.
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| CN107063075B (en) * | 2017-05-27 | 2023-05-26 | 苏州昱泽智能科技有限公司 | Angle detection equipment |
| JP2019032200A (en) * | 2017-08-07 | 2019-02-28 | マブチモーター株式会社 | Position sensor and motor |
| JP2019033575A (en) * | 2017-08-07 | 2019-02-28 | マブチモーター株式会社 | Position sensor and motor |
| FR3089715B1 (en) * | 2018-12-05 | 2020-12-25 | Safran Electrical & Power | Intelligent electric motor with decoupled multi-windings |
| CN110611388A (en) * | 2019-05-24 | 2019-12-24 | 锐斯沃(成都)科技有限责任公司 | Reluctance type rotary transformer with fault-tolerant function |
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| JP2016201944A (en) * | 2015-04-13 | 2016-12-01 | オークマ株式会社 | Stator and resolver |
| CN206283398U (en) * | 2016-12-29 | 2017-06-27 | 上海世昱电子技术有限公司 | A kind of rotary transformer and the rotary body with this rotary transformer |
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