CN202816634U - Brushless linear rotating transformer - Google Patents

Brushless linear rotating transformer Download PDF

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Publication number
CN202816634U
CN202816634U CN 201220492908 CN201220492908U CN202816634U CN 202816634 U CN202816634 U CN 202816634U CN 201220492908 CN201220492908 CN 201220492908 CN 201220492908 U CN201220492908 U CN 201220492908U CN 202816634 U CN202816634 U CN 202816634U
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China
Prior art keywords
rotor
stator
coil winding
brushless linear
electromotive force
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Withdrawn - After Issue
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CN 201220492908
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Chinese (zh)
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谭成忠
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谭成忠
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Priority to CN 201220492908 priority Critical patent/CN202816634U/en
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Abstract

A brushless linear rotating transformer is characterized by comprising a rotor (1), a stator (2), a primary coil winding (3), secondary coil windings (4), a bearing (5), an exciting power source (6) and a signal receiving processing system (7). The primary coil winding (3) is wound on a cylinder body of one end of the stator (2). One end of the rotor (1) is arranged in a round hole of the cylinder body. The axis of the primary coil winding (3) is in line with that of the rotor (1). The other end of the rotor (1) is connected with the other end of the stator (2) through the bearing (5). The secondary coil windings (4) are embedded in the inner sides of the stator (2), and the direction of the secondary coil windings (4) is perpendicular to the axial direction of the rotor (1). Exciting current of the exciting power source (6) flows through the primary coil winding (3) to generate an alternating magnetic field. The alternating magnetic field enables magnetic flux to form ring current in the rotating transformer through an air gap between the rotor (1) and the stator (2) and generates the induced electromotive force at two ends of the secondary coil windings (4). The signal receiving processing system (7) collects and processes induced electromotive force signals of the secondary coil windings (4), and outputs the angular position, the rotation number and angular speed parameters of the rotor (1). The brushless linear rotating transformer has the advantages of being simple and reliable in structure, good in stability, strong in anti-electromagnetic interference capacity and impact resistant capacity, and capable of carrying out high-speed multiturn precision measurement to the angular displacement and the angular speed of a rotating shaft of a rotating object.

Description

A kind of brushless linear revolver
Technical field
The utility model relates to a kind of brushless linear revolver, the angular displacement and the angular speed that are used for multi-turn accurate measurement rotating object as angular position sensing, in the electromechanical servo control system, have special purpose, also can be used for coordinate transform, triangulo operation and angle-data transmission, displacement measurement and vibration monitoring field.
Background technology
Resolver is widely used in the motion servo control system as angular position sensor, is used as sensing and the measurement of angle position.The tradition angular position sensing has photoelectric encoder, magnetic encoder and resolver.Optical-electricity encoder converts the angular displacement of rotating shaft to pulse digital signal by opto-electronic conversion.According to the photolithographicallpatterned of rotating disk and the output form of signal, photoelectric encoder can be divided into incremental encoder and absolute type encoder again.Incremental encoder is simple in structure, can provide in the mode of increment the information of angle position, but can not provide the information of initial position.Absolute type encoder is the absolute location information of output rotor directly, but its complex process.Photoelectric encoder has direct output digit signals and high-precision advantage, but photoelectric encoder can not be applied to adverse circumstances, and impact resistance is poor, and can not be applied to the High Rotation Speed measurement.Because therefore photoelectric encoder has limited the raising of resolution by the discrete photoetching output pulsed light signal of telecommunication of rotating disk in form.Magnetic encoder is measured the angular displacement of rotating shaft by the variation of magnetic pole.Because resolution is low and precision is relatively poor, the application of magnetic encoder does not have photoelectric encoder and resolver to popularize.
Resolver is a kind of electromagnetic sensor, is used for measuring rotating shaft angular travel and the angular speed of rotating object.Conventional resolver is comprised of stator and rotor, and wherein stator winding is accepted exciting voltage as the former limit of transformer, and the rotor winding is given birth to induced electromotive force by electromagnetic coupled in its two stopping pregnancy as the secondary of transformer.Rotating transformer structures is simple and reliable, the adverse circumstances that other rotary encoders of particularly suitable can't work.
The mode that resolver is introduced and drawn according to the rotor signal of telecommunication is divided into two kinds of brush and brushless resolvers is arranged.In the brush resolver is arranged, all be embedded with winding on stator and the rotor.The signal of telecommunication of rotor winding by sliding contact, is introduced or is drawn by the brush on epitrochanterian slip ring and the stator.Because the existence of brush configuration is arranged, and the reliability of this type of resolver is relatively poor.The resolver of present this structure seldom uses.
Brushless resolver has two kinds of versions, and a kind of is toroidal transformer formula brushless resolver, and another kind is magnetoresistance transformer.In toroidal transformer formula brushless resolver, a winding is on stator, and a winding is placed on rotor with one heart.Epitrochanterian toroidal transformer winding links with the rotor winding of doing the signal conversion.The input and output of the signal of telecommunication are finished by toroidal transformer.The excitation winding of magnetoresistance transformer and output winding are embedded in the same set of stator slot.The signal of telecommunication of two phase windings does with corner that sine and cosine changes, 90 ° of phase differences each other.The rotor magnetic pole shape of magnetoresistance transformer must particular design be processed, so that air-gap field is sinusoidal variations.
The former limit of conventional resolver, secondary winding are then with the change of the angular displacement generation relative position of rotor, the size of its output voltage changes with rotor angular displacement, sinusoidal, cosine function relation that the voltage magnitude of output winding and angle of rotor consist of, or keep a certain proportionate relationship, or linear with corner in certain angle range.Single low to the resolver precision of magnetic pole.In order to improve certainty of measurement, generally be equipped with in the conventional resolver many to magnetic pole, so complex structure.The former limit signal output of conventional resolver is the analog signal of two-phase quadrature, and their amplitude changes along with corner is sine and cosine.In order to obtain angle and angular velocity information, need the complicated demodulation circuit of design, expensive, and calculation of complex.What adopt at present all is application-specific integrated circuit (ASIC) mostly, for example the AD2S1200 of U.S. AD company, AD2S1205 be with 12 bit digital R/D converters of reference oscillator and AD2S1210 10 to 16 bit digital, with the digital variable R/D converter of reference oscillator, and the digital converter of rotary transformer produced of Lianyungang Jierui Electronic Co., Ltd..These reasons are restricted the large-scale application of conventional resolver.
Summary of the invention
A kind of brushless linear revolver that the utility model provides can not overcome the limitation of existing resolver.That novel brushless linear revolver has is simple and reliable for structure, the characteristics of good stability, anti-electromagnetic interference and strong shock resistance.Novel brushless linear revolver need not complicated demodulation circuit and application-specific integrated circuit (ASIC), rotating shaft angular travel and angular speed that can high speed multi-turn accurate measurement rotating object, and can follow continuously the variation of rotating shaft angular travel.
The purpose of this utility model realizes by following technological approaches: a kind of brushless linear revolver is accepted treatment system by rotor, stator, primary coil winding, secondary coil winding, bearing, excitation power supply and signal and is formed; The primary coil winding is fixed on the cylindrical shell of stator one end, and an end of rotor is placed in the circular hole of cylindrical shell, and the axis of primary coil winding is consistent with the axis of rotor, and rotor is connected by bearing with an other end of stator; The secondary coil winding is embedded in the inboard of stator, and its normal direction is axial perpendicular to rotor; The exciting curent of excitation power supply produces alternating magnetic field by the primary coil winding, alternating magnetic field makes magnetic flux form circulation in resolver by the air gap between rotor and stator, and at the two ends of secondary coil winding generation induced electromotive force, amplitude and the angle of rotor of induced electromotive force are linear; Signal is accepted the induced electromotive force signal for the treatment of system acquisition and processing secondary coil winding and angle position, revolution and the angular speed parameter of output rotor.
The rotor of novel brushless linear revolver parallel cam-like or axisymmetric multiple tooth cam-like axisymmetricly; Two or more rectangle secondary coil windings are uniform and be embedded in the inboard of stator, leave wide air gap between per two adjacent rectangle secondary coil windings; Air gap is in the form of slot to be distributed in the inboard of stator and to be parallel to the axial of stator.Rotor and stator are made of ferromagnetic material or Ferrite Material.Rotor is connected an end and is formed low magnetic resistance by ferromagnetic material or Ferrite Material and connect with stator.The bearing that connects rotor and stator is made of diamagnetic material or paramagnetic material, makes to form high magnetic resistance between the rotor of this end and the stator and isolate.
The excitation power supply of novel brushless linear revolver is the low-tension supply by forming after the common AC power step-down to 50 hertz or 60 hertz, the perhaps AC power by forming after the DC power supply inversion.Signal is accepted the induced electromotive force for the treatment of system output secondary coil winding, perhaps angle position, revolution and the angular speed parameter of output rotor after data are processed.
Description of drawings
Below in conjunction with accompanying drawing the purpose of this utility model and realization approach are described in further detail:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the flux loop schematic diagram in the novel brushless linear revolver;
Fig. 3 is the linear relationship schematic diagram of rotor-position and secondary coil winding inductance;
Fig. 4 is that parallel cam-like rotor of the present utility model and four secondary coil winding positions concern profile;
Fig. 5 is four secondary coil winding two ends electromotive force and rotor-position graphs of a relation corresponding to Fig. 4 structure;
Fig. 6 is that four finger cam shape rotors of the present utility model and four secondary coil winding positions concern profile.
Structure of the present utility model as shown in Figure 1.It comprises that rotor 1, stator 2, primary coil winding 3, secondary coil winding 4, bearing 5, excitation power supply 6 and signal accept treatment system 7.Because rotor 1 is consistent with stator 2 axis, so the width of air gap between the edge of cam follower 1 and stator 2 inwalls is a constant.The alternating current of excitation power supply 6 is by the axial generation induced field of primary coil winding 3 at rotor 1.Induced field forms flux loop by air gap at rotor 1 and 2 of stators, shown in the arrow among Fig. 2.Secondary coil winding 4 is embedded in the inboard of stator 2, and its normal direction is axial perpendicular to rotor.Excitation field produces induced electromotive force at the two ends of secondary coil winding.The frequency of induced electromotive force equates with the frequency of exciting curent.If the exterior normal of a symmetrical direction A-A of cam follower 1 and secondary coil winding abcd nAngle be θ, as shown in Figure 3.Because the round edge of cam follower 1 and the width of air gap between stator 2 inwalls are a constant, so the amplitude of the inductance of secondary coil winding and induced electromotive force and rotor position are linear.The induced electromotive force at secondary coil winding 4 two ends is relevant with the quantity of the shape of cam follower 1 and secondary coil winding 4.The angular speed of rotor equals θ to the derivative of time t, i.e. d θ/dt.Can record the revolution of rotor to the incremental integration of angle variation in the rotary course.Can determine angle position, revolution and the angular speed parameter of rotor by the induced electromotive force at measurements and calculations processing secondary coil winding 4 two ends.
Then with the change of the angular displacement generation relative position of rotor, the voltage magnitude of output winding becomes sine, cosine function to concern with angle of rotor for the former limit of conventional resolver, secondary winding.In order to obtain angle and angular velocity information, need design complicated demodulation circuit and application-specific integrated circuit (ASIC).A kind of brushless linear revolver that the utility model provides can not overcome the limitation of existing resolver, and amplitude and the angle of rotor of the induced electromotive force of output winding are linear relationship.Therefore the transformational relation between electromotive force amplitude and the corner is simple.
Embodiment
Embodiment one
Parallel cam-like rotor and four secondary coil windings are as a kind of combination configuration of the present utility model, and its position relationship section as shown in Figure 4.The round edge subtended angle of cam follower 1 is 90.Four secondary coil windings 4 that are equal to are distributed in the inboard of stator 2, and its normal direction is axial perpendicular to rotor.The subtended angle of each winding is 90.The subtended angle of adjacent two secondary coil windings is staggered 45.Each coil windings Central Symmetry coiling.Leave wide air gap between two adjacent rectangle secondary coil windings; Air gap is in the form of slot to be distributed in the inboard of stator and to be parallel to the axial of stator.When the round edge subtended angle of cam follower overlapped with the subtended angle of a certain secondary coil winding, the induced electromotive force amplitude at these coil windings two ends was maximum.When cam follower round edge symmetry axis when vertical with the normal direction of a certain secondary coil winding, the induced electromotive force amplitude at these coil windings two ends is minimum.If the angle of the normal of the round edge symmetry direction of cam follower and secondary coil winding is θ, as shown in Figure 3.In Fig. 4, be to be respectively efgh with reference to four uniform along clockwise direction windings from secondary coil winding abcd, ijkm, nopq, its two disconnected electromotive force is used respectively u 1, u 2, u 3, u 4Expression.The electromotive force value satisfies following relational expression:
The linear relationship of electromotive force and rotor position as shown in Figure 5.Four groups of electromotive force amplitude sums are a constant, are proportional to the voltage magnitude of excitation power supply.Can determine angle position, revolution and the angular speed parameter of rotor by the induced electromotive force of measuring secondary coil winding two ends.
Embodiment two
Four finger cam shape rotors and four secondary coil windings are as another kind of combination configuration of the present utility model, and its position relationship section as shown in Figure 6.The round edge subtended angle of cam follower 1 is 45.Four the secondary coil winding that is equal to 4 adjacent inboards that are distributed in stator 2, its normal direction is axial perpendicular to rotor.The subtended angle of each winding is 45.Leave wide air gap between two adjacent rectangle secondary coil windings, air gap is in the form of slot to be distributed in the inboard of stator and to be parallel to the axial of stator.Each coil windings Central Symmetry coiling.Four uniform windings are respectively abcd, efgh, ijkm, nopq along clockwise direction.When the round edge subtended angle of cam follower 1 overlapped with the subtended angle of a certain secondary coil winding, the induced electromotive force amplitude at these coil windings two ends was maximum.When cam follower round edge symmetry axis when vertical with the normal direction of a certain secondary coil winding, the induced electromotive force amplitude at these coil windings two ends is minimum.Four groups of electromotive force amplitude sums are a constant, are proportional to the voltage magnitude of excitation power supply.Can determine angle position, revolution and the angular speed parameter of rotor by the induced electromotive force of measuring secondary coil winding two ends.

Claims (7)

1. brushless linear revolver, it is characterized by: resolver is accepted treatment system (7) by rotor (1), stator (2), primary coil winding (3), secondary coil winding (4), bearing (5), excitation power supply (6) and signal and is formed; Primary coil winding (3) is around on the cylindrical shell of stator (2) one ends, one end of rotor (1) is placed in the circular hole of cylindrical shell, the axis of primary coil winding (3) is consistent with the axis of rotor (1), and rotor (1) is connected by bearing (5) with an other end of stator (2); Secondary coil winding (4) is embedded in the inboard of stator (2), and its normal direction is axial perpendicular to rotor (1); The exciting curent of excitation power supply (6) produces alternating magnetic field by primary coil winding (3), alternating magnetic field makes magnetic flux form circulation in resolver by the air gap between rotor (1) and stator (2), and produces induced electromotive force at the two ends of secondary coil winding (4); Signal is accepted the induced electromotive force signal for the treatment of system (7) acquisition and processing secondary coil winding (4) and angle position, revolution and the angular speed parameter of output rotor (1).
2. a kind of brushless linear revolver as claimed in claim 1 is characterized by: rotor (1) parallel cam-like or axisymmetric multiple tooth cam-like axisymmetricly.
3. a kind of brushless linear revolver as claimed in claim 1, it is characterized by: two or more rectangle secondary coil windings (4) are uniform and be embedded in the inboard of stator (2), leave wide air gap between per two adjacent rectangle secondary coil windings (4); Air gap is in the form of slot to be distributed in the inboard of stator (2) and to be parallel to the axial of stator (2).
4. a kind of brushless linear revolver as claimed in claim 1, it is characterized by: described rotor (1) and stator (2) are made of ferromagnetic material or Ferrite Material.
5. a kind of brushless linear revolver as claimed in claim 1, it is characterized by: the bearing (5) that connects rotor (1) and stator (2) is made of diamagnetic material or paramagnetic material, forms high magnetic resistance between the rotor (1) that makes this end and the stator (2) and isolates.
6. a kind of brushless linear revolver as claimed in claim 1, it is characterized by: excitation power supply (6) is the low-tension supply by forming after the common AC power step-down to 50 hertz or 60 hertz, the perhaps AC power by forming after the DC power supply inversion.
7. a kind of brushless linear revolver as claimed in claim 1, it is characterized by: signal is accepted the induced electromotive force for the treatment of system (7) output secondary coil winding (4), or after data are processed angle position, revolution and the angular speed parameter of output rotor (1).
CN 201220492908 2012-09-21 2012-09-21 Brushless linear rotating transformer Withdrawn - After Issue CN202816634U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220492908 CN202816634U (en) 2012-09-21 2012-09-21 Brushless linear rotating transformer

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102930966A (en) * 2012-09-21 2013-02-13 谭成忠 Brushless linear rotary transformer
CN108027253A (en) * 2015-09-30 2018-05-11 日本航空电子工业株式会社 Brushless resovler and rotation angle detection apparatus
CN108592781A (en) * 2018-05-14 2018-09-28 同济大学 A kind of motor rotor position detection method and detection device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102930966A (en) * 2012-09-21 2013-02-13 谭成忠 Brushless linear rotary transformer
WO2014044043A1 (en) * 2012-09-21 2014-03-27 Tan Chengzhong Brushless linear rotary transformer
US9587963B2 (en) 2012-09-21 2017-03-07 Chengzhong Tan Brushless linear rotary transformer
CN108027253A (en) * 2015-09-30 2018-05-11 日本航空电子工业株式会社 Brushless resovler and rotation angle detection apparatus
US10753771B2 (en) 2015-09-30 2020-08-25 Honda Motor Co., Ltd. Brushless resolver and rotation-angle detection device
CN108027253B (en) * 2015-09-30 2021-03-16 本田技研工业株式会社 Brushless resolver and rotation angle detection device
CN108592781A (en) * 2018-05-14 2018-09-28 同济大学 A kind of motor rotor position detection method and detection device
CN108592781B (en) * 2018-05-14 2021-05-11 同济大学 Motor rotor position detection method and detection device

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AV01 Patent right actively abandoned

Granted publication date: 20130320

Effective date of abandoning: 20150204

RGAV Abandon patent right to avoid regrant