CN110767429B - Reluctance type rotary transformer capable of high-speed operation - Google Patents
Reluctance type rotary transformer capable of high-speed operation Download PDFInfo
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- 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
- H01F27/24—Magnetic cores
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- 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
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- 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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Abstract
The invention belongs to the technical field of reluctance type rotary transformers, and particularly relates to a reluctance type rotary transformer capable of running at high speed. The silicon steel sheet material of the rotor is changed into a double-phase silicon steel sheet through a nitriding process, and a magnetic conduction area and a non-magnetic conduction area are formed. The rotor can run at high speed, the function of the reluctance type rotary transformer is realized, and the reluctance type rotary transformer has the advantages of simple structure, convenient production process and high product reliability.
Description
Technical Field
The invention belongs to the technical field of reluctance type rotary transformers, and particularly relates to a reluctance type rotary transformer capable of running at high speed.
Background
The reluctance type resolver is developed from a conventional resolver, which is a contact type resolver, and the safety of the resolver is reduced due to the use of an electric brush and a slip ring, and the increase of the resolver of a coupling transformer can realize brushless operation while making the structure redundant. In order to overcome the defects, experts develop a reluctance type rotary transformer, which not only realizes brushless operation, but also further simplifies the structure and solves the problem of excitation structure. However, most of the existing reluctance resolver rotors adopt a salient pole type structure, and when the transformer runs at a high speed, the internal stress and the wind abrasion loss of the rotor with the salient pole type structure are increased, so that the reluctance resolver has influence on the reliability and the high efficiency. In addition, the maximum speed of the current reluctance resolver with a wavy rotor is about sixty thousand revolutions, and a super-high-speed reluctance resolver with a rotational speed of one hundred thousand revolutions and above is not reported in documents.
In summary, there is no ultra-high speed reluctance type resolver with simple structure, high reliability and low windmilling loss.
Specifically, the current reluctance resolver types mainly include:
(1) the shape of the rotor is full circle: the typical one is a dual-channel axial magnetic circuit external rotor reluctance type rotary transformer of patent CN102664097A, specifically, as shown in fig. 1-1, the rotor is composed of a multipolar fine machine ripple magnetic tape, a single-pole coarse machine ripple magnetic tape and a non-magnetic conductive rotor bracket, the multipolar fine machine ripple magnetic tape and the single-pole coarse machine ripple magnetic tape are distributed along the circumferential direction of the rotor according to the wave shape, the stator corresponding to the rotor is also divided into two layers of a coarse machine stator and a fine machine stator, an excitation winding and a two-phase signal winding are arranged on the stator in an orthogonal mode, and no winding is arranged on the rotor. When the excitation winding passes through alternating current with constant voltage frequency, the two-phase signal winding respectively outputs voltage with electromotive force amplitude changing in sine and cosine along with the rotor rotation angle. The corrugated magnetic tape and the rotor core are fixed by a support sleeve made of non-magnetic material, so that the corrugated magnetic tape is not suitable for high-speed occasions. Specifically, 11-rotor, 12-stator, 13-air gap, 14-first phase signal winding, 15-second phase signal winding, 12-7-tooth slot. The schematic structural diagram of the double-channel axial magnetic circuit outer rotor reluctance type rotary transformer is shown in fig. 1-1.
(2) The rotor shape is wave type: currently, there are many schemes for designing reluctance resolvers for stator structures. For example: the patent CN206610730U reluctance type one-pair pole rotary transformer is designed to detect the absolute position of the rotor, and so on. As shown in fig. 1-2, the wave-shaped rotor has large wind abrasion loss and uneven stress distribution inside the rotor sheet when operating at ultrahigh speed, and thus cannot be applied to ultrahigh speed occasions. Specifically, in the schematic sectional view of the structure of the reluctance type one-pole resolver shown in fig. 1-2, 21-winding protection layer, 22-winding, 23-insulating end plate, 24-rotor core, 25-stator core, and 26-outgoing line.
At present, the rotor speed of most reluctance type rotary transformers can generally reach about 60000r/min when running at high speed, and the high-speed running of 100000r/min and above cannot be realized. The reluctance type transformer generally has a structural design change on a stator, and a rotor is still a wavy rotor, so that the wind abrasion loss of the rotary transformer is large. If the rotor is selected to be a full circle and the structure of the stator is changed, the structure of the rotary transformer is complex and the production process is difficult. The reluctance type rotary transformer with the wave type rotor structure has large internal stress, and is easy to damage and influence the service life of the transformer particularly when the reluctance type rotary transformer runs at high speed.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: how to provide a reluctance type resolver which can operate at high speed.
(II) technical scheme
To solve the above technical problems, the present invention provides a reluctance resolver capable of operating at a high speed, comprising: stator, stator winding, rotor 3;
the rotor 3 is positioned at the central part of the rotary transformer, the stator is positioned at the outer part of the rotary transformer, and the stator is arranged around the rotor 3;
the stator is composed of a plurality of circumferentially arranged stator teeth 1, the stator winding is wound on each stator tooth 3, and a stator slot 4 is formed between adjacent stator teeth 1.
Wherein the number of the stator teeth 1 is even.
Wherein the number of the stator teeth 1 is 16.
The stator winding comprises an excitation winding, a sine wave winding and a cosine wave winding;
the number of the excitation windings is the same as that of the stator teeth 1;
the number of the sine wave windings and the cosine wave windings is half of that of the stator teeth 1;
the distribution of the excitation winding, the sine wave winding and the cosine wave winding on the stator teeth 1 is as follows:
each excitation winding corresponds to one stator tooth 1 one by one and is positioned at the bottom of the stator tooth 1;
assuming that the even number of stator teeth 1 is 2N, two stator teeth 1 adjacent to each other by 2N stator teeth 1 in turn are defined as one group, thereby being divided into N groups of stator teeth 1 adjacent in turn, that is, N groups of stator teeth 1 adjacent in turnIs a stator tooth group IjWherein j is 1, 2, 3 … N;
for sine wave windings and cosine wave windings: in the stator tooth group with the odd number of j, the front end part of the stator tooth 1 is wound with a sinusoidal signal winding; in the stator tooth group where j is an even number, the leading end portion of the stator tooth 1 is wound with a cosine signal winding.
Or, in the stator tooth group with the odd j, the front end part of the stator tooth 1 is wound with a cosine signal winding; in the stator tooth group where j is an even number, the leading end portion of the stator tooth 1 is wound with a sinusoidal signal winding.
Wherein, the shape of the rotor 3 is set as a circle, and the circle-shaped rotor 3 is divided into: a rotor magnetically conductive region of the inner wave-shaped structure and a non-magnetically conductive region outside the inner wave-shaped structure.
Wherein, the stator tooth 1 is a stator core.
Wherein the stator is a conventional rotary transformer.
The rotor 3 is formed by overlapping silicon steel sheets, no coil is wound, and the stator and the rotor 3 are not in contact; specifically, the outer circle of the rotor has a wave-shaped salient magnetic pole shape, and the magnetic resistance type rotation transformation utilizes a salient pole effect to enable the mutual inductance between the excitation winding and the output winding to change along with the position of the rotor, so that the electromotive force of the output signal winding is induced.
The outer circle of the rotor 3 is added into a whole circle by the wavy salient magnetic poles, and the rotor silicon steel sheet material is made into a double-phase silicon steel sheet through nitriding process treatment, the wavy salient magnetic poles become non-magnetic conductive areas, the rest belong to magnetic conductive areas, or the wavy salient magnetic poles become magnetic conductive areas, and the rest belong to non-magnetic conductive areas;
when the stator teeth pass through the non-magnetic conduction area of the rotor, the magnetic resistance is large, the magnetic conductance is small, the main magnetic flux changes linearly along with the magnetic conductance, and when the magnetic conductance wave changes sinusoidally, the magnetic flux also changes sinusoidally, so that sine cosine waves are induced on the two electrical angle orthogonal windings.
Two layers of windings are wound on each stator tooth 1, exciting windings are reversely connected in series tooth by tooth, and sine signal windings and cosine signals are alternately distributed in pairs.
(III) advantageous effects
Compared with the prior art, the high-speed reluctance type rotary transformer has the advantages that the silicon steel sheet material of the rotor is changed into the double-phase silicon steel sheet through the nitriding process, and the two parts of the magnetic conduction area and the non-magnetic conduction area are formed. The rotor can run at high speed, the function of the reluctance type rotary transformer is realized, and the reluctance type rotary transformer has the advantages of simple structure, convenient production process and high product reliability.
Compared with the prior art, the method has the following distinguishing technical characteristics:
(1) compared with the problem that the traditional reluctance resolver can not generally realize high-speed or ultrahigh-speed operation, the technical scheme of the invention changes the silicon steel sheet material of the circular rotor into the double-phase silicon steel sheet through the nitriding process, so that the wavy rotor of the reluctance resolver is a magnetic conduction area, and then the circular arc is added at the periphery of the wavy rotor to form a whole circle, wherein the circular arc is a non-magnetic conduction area. Similarly, the solution is also feasible after the exchange of the magnetic conducting area and the non-magnetic conducting area.
(2) Compared with the defect that the stress distribution is unbalanced when the traditional wavy rotor runs at high speed, the reluctance type rotary transformer in the technical scheme of the invention has the advantages that the rotor is in a full circle shape, and the stress distribution of the rotor is uniform when the rotor runs at high speed, so that the reluctance type rotary transformer in the technical scheme of the invention can bear more than one hundred thousand revolutions without being damaged.
(3) Compared with the problem that the wind abrasion loss of the traditional reluctance type rotary transformer is large when the traditional reluctance type rotary transformer runs at a high speed, the wind abrasion loss of the excircle of the rotor is obviously reduced when the reluctance type rotary transformer runs at the high speed.
(4) Compared with the problem that the traditional reluctance resolver can not generally realize high-speed or ultrahigh-speed operation, the technical scheme of the invention adds the circular arc on the periphery of the wavy rotor to form a complete circle, so that the reluctance resolver can operate at high speed or ultrahigh speed.
In summary, the rotor in the prior art is generally in a salient pole type structure, so that when the rotary transformer runs at a high speed, not only is great wind abrasion loss generated, but also the internal stress of the rotor is increased; in addition, the existing scheme that the rotor is in a full circle adopts the supporting sleeve to fix the magnetic conduction part and the non-magnetic conduction part of the rotor, so that the rotor cannot run at high speed or ultra-high speed.
The technical scheme of the invention changes the silicon steel sheet material of the circular rotor into the bidirectional silicon steel sheet by adopting the nitriding process, has simple realization and is very suitable for the reluctance type rotary transformer needing high-speed operation. Compared with the prior art, the technical advantages of the technical scheme of the invention are embodied in the following aspects:
(1) simple structure and convenient production process.
(2) The reluctance type resolver can be guaranteed to operate at a high speed with minimum loss.
(3) Compare in wavy rotor structure, the reluctance resolver rotor of this application is the whole circle, and internal stress is little, and product life is longer.
(4) At present, when the reluctance type transformer runs at a high speed, the rotor can reach 60000r/min, and the reluctance type rotary transformer can reach 100000 r/min.
(5) The silicon steel sheet treated by the nitriding process is not weakened in material strength but increased.
Drawings
Fig. 1-1 is a schematic structural view of a conventional dual-channel axial magnetic circuit outer rotor reluctance resolver.
Fig. 1-2 are schematic sectional views of a conventional reluctance type one-pair rotary transformer.
Fig. 2 is an assembly diagram of the technical solution of the present invention.
Fig. 3 is a stator winding distribution diagram of the present application.
Fig. 4 is a rotor structure view of the present application.
The stator comprises 1-stator teeth, 2-1-excitation windings, 2-2-sine signal windings, 2-3-cosine signal windings, 3-rotors and 4-stator slots.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
To solve the problems of the prior art, the present invention provides a reluctance resolver capable of operating at a high speed, as shown in fig. 2, which is a general assembly diagram of the present application, the reluctance resolver comprising: stator, stator winding, rotor 3;
the rotor 3 is positioned at the central part of the rotary transformer, the stator is positioned at the outer part of the rotary transformer, and the stator is arranged around the rotor 3;
the stator is composed of a plurality of circumferentially arranged stator teeth 1, the stator winding is wound on each stator tooth 3, and a stator slot 4 is formed between adjacent stator teeth 1.
Wherein the number of the stator teeth 1 is even.
Wherein the number of the stator teeth 1 is 16.
Fig. 3 is a diagram showing a stator winding distribution of a reluctance resolver capable of operating at a high speed according to the present application, where the stator winding includes an excitation winding, a sine wave winding, and a cosine wave winding;
the number of the excitation windings is the same as that of the stator teeth 1;
the number of the sine wave windings and the cosine wave windings is half of that of the stator teeth 1;
the distribution of the excitation winding, the sine wave winding and the cosine wave winding on the stator teeth 1 is as follows:
each excitation winding corresponds to one stator tooth 1 one by one and is positioned at the bottom of the stator tooth 1;
assuming that the number of stator teeth 1 is 2N, two stator teeth 1 adjacent to each other in pairs of 2N stator teeth 1 are defined as a group, and are divided into N groups of stator teeth 1 adjacent to each other in sequence, that is, a stator tooth group IjWherein j is 1, 2, 3 … N;
for sine wave windings and cosine wave windings: in the stator tooth group with the odd number of j, the front end part of the stator tooth 1 is wound with a sinusoidal signal winding; in the stator tooth group where j is an even number, the leading end portion of the stator tooth 1 is wound with a cosine signal winding.
Or, in the stator tooth group with the odd j, the front end part of the stator tooth 1 is wound with a cosine signal winding; in the stator tooth group where j is an even number, the leading end portion of the stator tooth 1 is wound with a sinusoidal signal winding.
That is, the excitation windings are distributed at the bottom of 16 stator teeth 1 as viewed from the upper portion of the stator winding distribution pattern. The front end portion of the stator tooth 1 in the twelve o' clock direction as shown in fig. 3 is wound with a sine signal winding, and the front end portion of the stator tooth next to the stator tooth adjacent in the counterclockwise direction is also wound with a sine signal winding, in pairs, and the sine signal winding and the cosine signal winding are alternately distributed at the front end portion of the stator tooth 1, which forms the distribution of the windings of the stator.
As shown in fig. 4, the rotor structure diagram of the present application is provided, the shape of the rotor 3 is set to be circular, and the circular rotor 3 is divided into: the rotor magnetic conductive region of the inner wave-shaped structure and the non-magnetic conductive region outside the inner wave-shaped structure, which is the hatched region in fig. 3.
Wherein, the stator tooth 1 is a stator core.
Wherein the stator is a conventional rotary transformer.
The rotor 3 is only formed by overlapping silicon steel sheets, no coil is wound, and the stator and the rotor 3 are not in contact; specifically, the outer circle of the rotor has a wave-shaped salient magnetic pole shape, and the magnetic resistance type rotation transformation utilizes a salient pole effect to enable the mutual inductance between the excitation winding and the output winding to change along with the position of the rotor, so that the electromotive force of the output signal winding is induced.
As shown in fig. 4, the outer circle of the rotor 3 is added into a whole circle by the wavy salient magnetic poles, and the silicon steel sheet material of the rotor is made into a dual-phase silicon steel sheet by the nitriding process, so that the wavy salient magnetic poles become non-magnetic conductive regions and the rest belong to magnetic conductive regions, or the wavy salient magnetic poles become magnetic conductive regions and the rest belong to non-magnetic conductive regions;
when the stator teeth pass through the non-magnetic conduction area of the rotor, the magnetic resistance is large, the magnetic conductance is small, the main magnetic flux changes linearly along with the magnetic conductance, and when the magnetic conductance wave changes sinusoidally, the magnetic flux also changes sinusoidally, so that sine cosine waves are induced on the two electrical angle orthogonal windings.
Two layers of windings are wound on each stator tooth 1, exciting windings are reversely connected in series tooth by tooth, and sine signal windings and cosine signals are alternately distributed in pairs.
Further, the reluctance type resolver may be a pair of poles or may be a plurality of pairs of poles.
Further, the windmilling loss of the outer circumference of the rotor 3 at high-speed operation is significantly reduced.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A reluctance resolver that can operate at high speed, comprising: a stator, a stator winding, a rotor (3);
the rotor (3) is positioned at the central part of the rotary transformer, the stator is positioned at the outer part of the rotary transformer, and the stator is arranged around the rotor (3);
the stator is composed of a plurality of circumferentially arranged stator teeth (1), each stator tooth (3) is wound with a stator winding, and a stator slot (4) is formed between adjacent stator teeth (1);
the rotor (3) is formed by overlapping silicon steel sheets, no coil is wound, and the stator and the rotor (3) are not in contact; specifically, the excircle of the rotor has a wave-shaped salient magnetic pole shape, and the magnetic resistance type rotation transformation utilizes a salient pole effect to ensure that the mutual inductance between an excitation winding and an output winding changes along with the position of the rotor, so as to induce the electromotive force of an output signal winding;
adding the wavy salient magnetic poles to the outer circle of the rotor (3) to form a whole circle, and performing nitriding process treatment to enable the rotor silicon steel sheet material to be a two-phase silicon steel sheet, wherein the wavy salient magnetic poles form a non-magnetic conduction region, and the rest belong to a magnetic conduction region, or enabling the wavy salient magnetic poles to form a magnetic conduction region and the rest belong to a non-magnetic conduction region;
when the stator teeth pass through the non-magnetic conduction area of the rotor, the magnetic resistance is large, the magnetic conductance is small, the main magnetic flux changes linearly along with the magnetic conductance, and when the magnetic conductance wave changes sinusoidally, the magnetic flux also changes sinusoidally, so that sine cosine waves are induced on the two electrical angle orthogonal windings.
2. A reluctance resolver according to claim 1, which can operate at high speed, wherein the number of the stator teeth (1) is even.
3. A reluctance resolver according to claim 2, which can be operated at high speed, wherein the number of the stator teeth (1) is 16.
4. A reluctance-type resolver according to claim 2, which can be operated at high speed, wherein the stator winding comprises an excitation winding, a sine wave winding and a cosine wave winding;
the number of the excitation windings is the same as that of the stator teeth (1);
the number of the sine wave windings and the cosine wave windings is half of that of the stator teeth (1);
the distribution of the excitation winding, the sine wave winding and the cosine wave winding on the stator teeth (1) is as follows:
each excitation winding corresponds to one stator tooth (1) one by one and is positioned at the bottom of each stator tooth (1);
assuming that the number of the stator teeth (1) is 2N, two stator teeth (1) which are adjacent to each other and are formed by the 2N stator teeth (1) are defined as a group, and the group is divided into N groups of stator teeth (1) which are adjacent to each other in sequence, namely a stator tooth group IjWherein j is 1, 2, 3 … N;
for sine wave windings and cosine wave windings: in the stator tooth group with the odd j, the front end part of the stator tooth (1) is wound with a sinusoidal signal winding; in the stator tooth group with j being even number, the front end part of the stator tooth (1) is wound with a cosine signal winding;
or, in the stator tooth group with the odd j, the front end part of the stator tooth (1) is wound with a cosine signal winding; in the stator tooth group with j being even number, the front end part of the stator tooth (1) is wound with the sine signal winding.
5. A reluctance resolver according to claim 2, which can be operated at high speed, wherein the shape of said rotor (3) is set to be circular, said circular rotor (3) being divided into: a rotor magnetically conductive region of the inner wave-shaped structure and a non-magnetically conductive region outside the inner wave-shaped structure.
6. A reluctance resolver according to claim 1, which can operate at high speed, wherein said stator teeth (1) are stator cores.
7. A reluctance resolver according to claim 1, wherein the stator is a conventional resolver.
8. A reluctance resolver according to claim 4, which can operate at high speed, wherein each of said stator teeth (1) is wound with two layers of windings, wherein the excitation windings are connected in series in the reverse direction tooth by tooth, and the sine signal windings and the cosine signal windings are alternately arranged two by two.
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| CN113765245A (en) * | 2021-09-27 | 2021-12-07 | 浙江皇冠电动工具制造有限公司 | Switched reluctance motor |
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| JP6211235B2 (en) * | 2015-06-05 | 2017-10-11 | 三菱電機株式会社 | Resolver, rotating electric machine, and elevator hoisting machine |
| CN205723135U (en) * | 2016-06-27 | 2016-11-23 | 陕西博华高低压开关成套设备制造有限公司 | A kind of asymmetric tooth magnetoresistance transformer |
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| CN110277889B (en) * | 2019-05-28 | 2021-11-02 | 安徽大学 | Stator permanent magnet type rotary transformer |
| CN110350750B (en) * | 2019-05-28 | 2021-09-21 | 安徽大学 | Stator permanent magnet type rotary transformer with even poles |
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| CN102034596A (en) * | 2010-11-17 | 2011-04-27 | 哈尔滨工业大学 | Axial magnetic path multi-pole pair reluctance type rotary transformer |
| CN102664098A (en) * | 2012-06-06 | 2012-09-12 | 哈尔滨工业大学 | Outer rotor axial magnetic circuit reluctance type rotary transformer with multiple pairs of poles for space manipulator |
| CN110235356A (en) * | 2016-12-02 | 2019-09-13 | 梨木政行 | Electric motor and controller device |
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