CN114864271B - Coil winding method of rotary transformer - Google Patents
Coil winding method of rotary transformer Download PDFInfo
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- CN114864271B CN114864271B CN202210572276.1A CN202210572276A CN114864271B CN 114864271 B CN114864271 B CN 114864271B CN 202210572276 A CN202210572276 A CN 202210572276A CN 114864271 B CN114864271 B CN 114864271B
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- 238000004804 winding Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000008878 coupling Effects 0.000 claims description 5
- 230000001808 coupling effect Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000005284 excitation Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/06—Coil winding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/18—Rotary transformers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The invention discloses a coil winding method of a rotary transformer, which comprises the following steps of winding an exciting coil; winding the exciting coils on each stator tooth, wherein the winding directions of the exciting coils on each stator tooth are opposite; grouping the stator teeth; grouping T total stator teeth by taking n adjacent stator teeth as a group to obtain T/n groups of stator teeth, wherein n is more than or equal to 2; calculating the number of turns of the sine coil and the cosine coil; winding the sinusoidal coil; winding the sinusoidal coils on the stator teeth of the odd groups, wherein the winding directions of the sinusoidal coils in the groups are the same, and the winding directions of the sinusoidal coils in the groups are opposite; winding the cosine coil; and winding cosine coils on the stator teeth of the even groups, wherein the winding directions of the cosine coils in the groups are the same, and the winding directions of the cosine coils in the groups are opposite. The invention can improve the precision of the rotary transformer.
Description
Technical Field
The invention relates to the field of rotary transformers, in particular to a coil winding method of a rotary transformer.
Background
In order to grasp the position information of the motor rotor, to obtain better control performance, a rotor position sensor is generally required. Common position sensors are photoelectric encoders and rotary transformers. However, the photoelectric encoder is not suitable for use in high temperature and vibration environments, and mechanical installation is difficult. The rotary transformer can generate high-precision position signals, is simple in structure, stable and reliable, and can be conveniently integrated into a motor system. Meanwhile, the composite material has the advantages of high temperature resistance, moisture resistance, vibration resistance and the like, and is widely applied to the fields of aerospace, military, electric automobiles and the like.
At present, there are many methods for designing, winding or optimizing the coil of the rotary transformer, but the same problems exist: firstly, the coil design and winding method is complex, so that the volume of the rotary transformer is larger, and the precision is poor; the sine coil and the cosine coil of the second rotary transformer are wound on the same stator tooth or are arranged at intervals, the distance between the sine coil and the cosine coil is relatively short, strong coupling exists between magnetic fields of the coils, mutual influence exists between output electromotive forces, and measurement accuracy is further reduced. Therefore, the coils of the rotary transformer are further optimally configured, the volume of the rotary transformer is reduced, the magnetic field coupling of the coils is reduced, and the measurement accuracy of the rotary transformer is improved, so that the problems to be solved are urgent.
Disclosure of Invention
The present invention has been made in view of the above-described problems, and an object thereof is to provide a coil winding method of a resolver. The number of turns of the sine coil and the cosine coil is calculated according to the total number of turns of the output coil of the rotary transformer and the number of pole pairs of the rotor, equal turn arrangement is realized, coil design and winding are simplified, and errors caused by rounding of the number of turns of the coils are eliminated. Meanwhile, the stator teeth are grouped, the distance between the sine coil and the cosine coil is increased, the coupling effect of the coil magnetic field is weakened, the mutual influence between output electromotive forces is reduced, and the precision of the rotary transformer is improved.
The invention provides a coil winding method of a rotary transformer, which comprises the following steps:
Step S1, winding an exciting coil; winding the exciting coils on each stator tooth, wherein the winding directions of the exciting coils on each stator tooth are opposite;
S2, grouping the stator teeth; grouping T total stator teeth by taking n adjacent stator teeth as a group to obtain T/n groups of stator teeth, wherein n is more than or equal to 2;
s3, calculating the turns of the sine coil and the cosine coil; the turns of the sine coil and the cosine coil are the same;
S4, winding the sinusoidal coil; winding the sinusoidal coils on the stator teeth of the odd groups, wherein the winding directions of the sinusoidal coils in the groups are the same, and the winding directions of the sinusoidal coils in the groups are opposite;
step S5, winding the cosine coil; and winding cosine coils on the stator teeth of the even groups, wherein the winding directions of the cosine coils in the groups are the same, and the winding directions of the cosine coils in the groups are opposite.
Further, in the step S3, the number of turns of the sine coil and the cosine coil is calculated as follows:
n i represents the number of turns of the sine coil and the cosine coil, N tol represents the total number of turns of the sine coil and the cosine coil, and p is the number of pole pairs of the rotor.
Further, the rotary transformer is a sine-cosine rotary transformer.
Further, the rotary transformer further comprises a stator core, and the stator teeth are arranged on the stator core.
Further, the stator teeth extend along the radius of the stator core towards the rotor direction, and the stator teeth are uniformly distributed along the circumferential direction of the stator core.
The beneficial technical effects of the invention are as follows:
(1) The invention calculates the turns of the sine coil and the cosine coil according to the total turns of the output coil of the rotary transformer and the pole pair number of the rotor, realizes equal turn arrangement, simplifies coil design and winding, and eliminates errors caused by rounding the turns of the coils.
(2) The stator teeth are grouped, the distance between the sine coil and the cosine coil is increased, the coupling effect of the coil magnetic field is weakened, the mutual influence between output electromotive forces is reduced, and the precision of the rotary transformer is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a prior art method of winding a coil of a resolver;
Fig. 2 is a diagram illustrating a method for winding a coil of a resolver according to the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a coil winding method of a rotary transformer, which calculates the number of turns of a sine coil and a cosine coil according to the total number of turns of an output coil of the rotary transformer and the number of pole pairs of a rotor, realizes equal turn arrangement, ensures that coil design and winding are simple, and also eliminates errors caused by rounding the number of turns of the coil. Meanwhile, the stator teeth are grouped, the distance between the sine coil and the cosine coil is increased, the coupling effect of the coil magnetic field is weakened, the mutual influence between output electromotive forces is reduced, and the precision of the rotary transformer is improved.
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
In the prior art, the rotary transformer utilizes the salient pole effect of the rotor to enable the induced electromotive force output by the sine coil and the cosine coil to form a sine-cosine change relation with the rotor rotation angle. The rotor rotates a circle, the output voltage change cycle number is equal to the rotor salient pole number, and therefore the rotor salient pole number of the rotary transformer is the pole pair number. The sine coil and the cosine coil output voltages have the same amplitude and frequency, are symmetrically arranged and have 90-degree electric angle phase difference. The induced electromotive force of the exciting coil, the sine coil, and the cosine coil in the resolver can be expressed as:
Usou＝Umsinωt
Usin＝KUmsinωt·sinpθ
Ucos＝KUmsinωt·cospθ
Wherein U sou、Usin、Ucos represents the induced electromotive forces of an excitation coil, a sine coil and a cosine coil respectively, K is a voltage transformation ratio, U m is an excitation voltage amplitude, ω is an excitation frequency, p is a rotor pole pair number, θ is a rotor angle, and t is time. And calculating the position information of the rotor according to the tangent value of the output voltage envelope curve of the two-phase signal winding.
The rotary transformer structure in the prior art mainly comprises a stator, a rotor, an exciting coil, a sine coil and a cosine coil. The stator is formed by laminating silicon steel sheets with tooth grooves, and the excircle shape of the rotor is designed into a salient pole structure. Wherein the exciting coil, the sine coil and the cosine coil are all wound on the stator teeth, and the stator teeth are unfolded as shown in fig. 1. The winding directions of the exciting coil, the sine coil and the cosine coil on two adjacent stator teeth are opposite, and the turns of the sine coil and the cosine coil on each stator tooth are expressed as follows:
N sini、Ncosi represents the number of turns of the sine coil and the cosine coil on the ith stator tooth, N max represents the number of turns of the sine coil and the cosine coil, and T represents the total number of stator teeth.
As can be seen from the expressions of the turns of the sine coil and the cosine coil, the turns of the sine coil and the cosine coil of the rotary transformer in the prior art are unequal, the complexity of the manufacturing process is increased, and meanwhile, larger errors are caused by rounding the sine coil and the cosine coil; in addition, as can be seen from fig. 1, sine coils and cosine coils are wound on each stator tooth, the distance between the sine coils and the cosine coils is relatively short, strong coupling exists between magnetic fields of the coils, the output electromotive forces are mutually influenced, and the precision of the rotary transformer is reduced.
Based on the above problems, the present invention provides a coil winding method of a resolver, as shown in fig. 2. The invention is applicable to any type of resolver, in particular a sine-cosine resolver. The coil winding method specifically comprises the following steps:
and S1, winding the exciting coil. And winding an exciting coil on each stator tooth, wherein the winding directions of the exciting coils on each stator tooth are opposite.
Step S2, grouping the stator teeth. And grouping the T total stator teeth by taking the adjacent n stator teeth as a group to obtain T/n groups of stator teeth, wherein n is more than or equal to 2.
In step S2, n may be specifically adjusted according to T to obtain an integer T/n. Specifically, as shown in fig. 2, the total stator teeth are grouped with n=2.
And S3, calculating the turns of the sine coil and the cosine coil. Wherein the turns of the sine coil and the cosine coil are the same.
In particular, the method comprises the steps of,
Wherein, N i represents the number of turns of the sine coil and the cosine coil, N tol represents the total number of turns of the sine coil and the cosine coil, T represents the total number of stator teeth, and p represents the number of pole pairs of the rotor.
In the invention, the turns of the sine coil, the cosine coil and the like are arranged, and the turns of the sine coil and the cosine coil on each stator tooth can be calculated according to the total turns of the output coil of the rotary transformer and the pole pair number of the rotor, so that the coil design and winding are simplified, and the error caused by rounding the turns of the coil is eliminated.
And S4, winding the sinusoidal coil. Sinusoidal coils are wound on the stator teeth of the odd groups, the winding directions of the sinusoidal coils in the groups are the same, and the winding directions of the sinusoidal coils among the groups are opposite.
And S5, winding the cosine coil. And winding cosine coils on even groups of stator teeth, wherein the winding directions of the cosine coils in the groups are the same, and the winding directions of the cosine coils among the groups are opposite.
In the prior art, sine coils and cosine coils are wound on the same stator tooth or are arranged at intervals, the distance between the sine coils and the cosine coils is relatively short, strong coupling exists between magnetic fields of the coils, and the output electromotive forces are mutually influenced. In the invention, adjacent stator teeth are divided into a group through stator teeth grouping, and the sine coils and the cosine coils are respectively wound, so that the distance between the sine coils and the cosine coils is increased, the coupling effect of the magnetic field of the coils is weakened, the mutual influence between output electromotive forces is reduced, and the precision of the rotary transformer is further improved.
Further, in another embodiment of the present invention, the rotary transformer further includes a stator core, the stator teeth are disposed on the stator core, each of the stator teeth extends along a radius of the stator core toward the rotor direction, and each of the stator teeth is uniformly distributed along a circumferential direction of the stator core.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a product or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such product or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a commodity or system comprising such elements.
While the foregoing description illustrates and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as limited to other embodiments, and is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept as described herein, either as a result of the foregoing teachings or as a result of the knowledge or technology in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (3)
1. A method of winding a coil of a resolver, comprising:
Step S1, winding an exciting coil; winding the exciting coils on each stator tooth, wherein the winding directions of the exciting coils on each stator tooth are opposite;
S2, grouping the stator teeth; grouping 8 total stator teeth by taking 2 adjacent stator teeth as a group to obtain 4 groups of stator teeth;
s3, calculating the turns of the sine coil and the cosine coil; the turns of the sine coil and the cosine coil are the same;
S4, winding the sinusoidal coil; winding the sinusoidal coils on the stator teeth of the odd groups, wherein the winding directions of the sinusoidal coils in the groups are the same, and the winding directions of the sinusoidal coils in the groups are opposite;
Step S5, winding the cosine coil; winding cosine coils on the stator teeth of the even groups, wherein the winding directions of the cosine coils in the groups are the same, and the winding directions of the cosine coils in the groups are opposite;
When the sine coil and the cosine coil are arranged at intervals, the distance between the sine coil and the cosine coil is relatively short, strong coupling exists between the magnetic fields of the coils, and the output electromotive forces are mutually influenced, so that stator teeth are grouped by the coil winding method, the distance between the sine coil and the cosine coil is increased, the coupling effect of the magnetic fields of the coils is weakened, the mutual influence between the output electromotive forces is reduced, and the precision of the rotary transformer is improved;
The number of turns calculation formulas of the sine coil and the cosine coil in the step S3 are as follows:
Wherein/> The turns of the sine coil and the cosine coil are represented, N tol is the total turns of the sine coil and the cosine coil, and p is the pole pair number of the rotor;
The rotary transformer is a sine-cosine rotary transformer.
2. The method of claim 1, further comprising a stator core, the stator teeth being disposed on the stator core.
3. The method of winding a coil of a resolver according to claim 2, wherein the stator teeth each extend in a rotor direction along the radius of the stator core, and each of the stator teeth is uniformly distributed along a circumferential direction of the stator core.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210572276.1A CN114864271B (en) | 2022-05-24 | 2022-05-24 | Coil winding method of rotary transformer |
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| CN202210572276.1A CN114864271B (en) | 2022-05-24 | 2022-05-24 | Coil winding method of rotary transformer |
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| CN114864271B true CN114864271B (en) | 2024-04-30 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4255682A (en) * | 1978-09-25 | 1981-03-10 | Okuma Machinery Works Ltd. | Multipolar resolver |
| CN202043016U (en) * | 2011-04-06 | 2011-11-16 | 江门职业技术学院 | External rotor magnetic resistance type angular position sensor |
| CN103280936A (en) * | 2013-05-15 | 2013-09-04 | 广东威灵电机制造有限公司 | Winding method of stator and product thereof |
| CN104201861A (en) * | 2014-08-21 | 2014-12-10 | 广东威灵电机制造有限公司 | Stator of variable reluctance resolver and variable reluctance resolver |
| CN109637796A (en) * | 2019-02-11 | 2019-04-16 | 西安微电机研究所 | A kind of high-precision magnetoresistance transformer and its method for winding |
| CN209103931U (en) * | 2018-12-25 | 2019-07-12 | 上海赢双电机有限公司 | A kind of rotary transformer of uniformly distributed signal winding |
| CN110350750A (en) * | 2019-05-28 | 2019-10-18 | 安徽大学 | A kind of stator permanent-magnet rotary transformer of even number pole |
-
2022
- 2022-05-24 CN CN202210572276.1A patent/CN114864271B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4255682A (en) * | 1978-09-25 | 1981-03-10 | Okuma Machinery Works Ltd. | Multipolar resolver |
| CN202043016U (en) * | 2011-04-06 | 2011-11-16 | 江门职业技术学院 | External rotor magnetic resistance type angular position sensor |
| CN103280936A (en) * | 2013-05-15 | 2013-09-04 | 广东威灵电机制造有限公司 | Winding method of stator and product thereof |
| CN104201861A (en) * | 2014-08-21 | 2014-12-10 | 广东威灵电机制造有限公司 | Stator of variable reluctance resolver and variable reluctance resolver |
| CN209103931U (en) * | 2018-12-25 | 2019-07-12 | 上海赢双电机有限公司 | A kind of rotary transformer of uniformly distributed signal winding |
| CN109637796A (en) * | 2019-02-11 | 2019-04-16 | 西安微电机研究所 | A kind of high-precision magnetoresistance transformer and its method for winding |
| CN110350750A (en) * | 2019-05-28 | 2019-10-18 | 安徽大学 | A kind of stator permanent-magnet rotary transformer of even number pole |
Non-Patent Citations (1)
| Title |
|---|
| 磁阻式旋转变压器设计;董卫红;;机电工程技术;20150331(第03期);全文 * |
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