CN108917796B - Inductive rotary transformer - Google Patents
Inductive rotary transformer Download PDFInfo
- Publication number
- CN108917796B CN108917796B CN201810634482.4A CN201810634482A CN108917796B CN 108917796 B CN108917796 B CN 108917796B CN 201810634482 A CN201810634482 A CN 201810634482A CN 108917796 B CN108917796 B CN 108917796B
- Authority
- CN
- China
- Prior art keywords
- receiving coil
- circuit board
- pin
- coil
- piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001939 inductive effect Effects 0.000 title claims abstract description 28
- 239000003990 capacitor Substances 0.000 claims description 35
- 230000006698 induction Effects 0.000 claims description 27
- 230000005284 excitation Effects 0.000 claims description 14
- 238000004804 winding Methods 0.000 claims description 12
- 230000000295 complement effect Effects 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
- G01D5/22—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature differentially influencing two coils
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention relates to an inductive rotary transformer, which comprises an inductive piece and a stator, wherein the inductive piece and the stator are coaxially arranged, the inductive piece is rotatably arranged on a measuring rotating shaft around the axis of the inductive piece, the stator is arranged on a circuit board, and a gap is arranged between the inductive piece and the circuit board; the stator comprises an exciting coil, a receiving coil and a processing circuit; the exciting coil is connected with the processing circuit, and the receiving coil comprises a first receiving coil and a second receiving coil which are respectively connected with the processing circuit; the first receiving coil and the second receiving coil are arranged on the inner side of the exciting coil; the exciting coils are spirally wound along the circumferential direction for a plurality of circles by taking the axis of the stator as the center of a circle, and the exciting coils are distributed on any one of the two sides of the circuit board, or the exciting coils are distributed on both sides of the circuit board. The rotary transformer has the advantages of good adaptability to the size of an air gap, low manufacturing cost, light weight and simple operation and use.
Description
Technical Field
The invention belongs to the technical field of rotary transformers, and particularly relates to an inductive rotary transformer.
Background
In alternating current asynchronous electric car motors, the sensors mainly function as speed sensing, whereas in permanent magnet motors and reluctance motors, the sensors generally function as both speed sensing and position sensing. Currently widely used rotary transformers are designed by the reluctance type principle, when a rotor rotates relative to a stator, the air gap flux guide of the space changes, the change of the air gap flux guide causes the change of mutual inductance between an input winding and an output winding, and the potential induced by the output winding also changes. In practical application, the rotation angle of the rotor is measured through the change of the amplitude of the output voltage, and the rotation speed of the rotor is measured through the measurement of the frequency of the output sine and cosine signals.
However, the rotor of the reluctance type rotary transformer is a salient pole type iron core, the stator iron core is formed by laminating silicon steel sheets with a certain number of slots, the material cost is high, and the weight is heavy; the working air gap between the rotor and the stator of the reluctance type rotary transformer is small, and the installation precision requirement is high; the different pole numbers of the reluctance type rotary transformer must apply sine excitation signals with corresponding frequencies and amplitudes, the input signals must be generated by specially designed interface circuits, and the output amplitude modulation wave signals also need corresponding circuits to demodulate and compensate the phase of the amplitude modulation wave signals, which is relatively complex to use.
Disclosure of Invention
According to the problems existing in the prior art, the invention provides the inductive rotary transformer which has good adaptability to the size of an air gap, low manufacturing cost, light weight and simpler operation and use.
The invention adopts the following technical scheme:
the inductive rotary transformer comprises an inductive piece and a stator which are coaxially arranged, wherein the inductive piece is rotatably arranged on a measuring rotating shaft around the axis of the inductive piece, the stator is arranged on a circuit board, and a gap is arranged between the inductive piece and the circuit board;
the stator comprises an exciting coil, a receiving coil and a processing circuit; the exciting coil is connected with the processing circuit, and the receiving coil comprises a first receiving coil and a second receiving coil which are respectively connected with the processing circuit; the first receiving coil and the second receiving coil are arranged on the inner side of the exciting coil;
the exciting coils are spirally wound for a plurality of circles along the circumferential direction by taking the axis of the stator as the center of a circle, and the exciting coils are distributed on any one of the two sides of the circuit board, or the exciting coils are distributed on both sides of the circuit board;
the first receiving coil is wound on the circuit board along the circumferential direction for a plurality of circles, each circle is alternately wound on the front surface and the back surface of the circuit board, and the projection of the first receiving coil on the plane where the circuit board is located forms a plurality of closed loops which are connected in sequence; the winding mode of the second receiving coil is the same as that of the first receiving coil, and the first receiving coil and the second receiving coil are arranged by taking the coaxially arranged axle center as the center of a circle and rotating by a certain angle.
When the induction sheet rotates, the area change rate of a single closed loop covered by the induction sheet along the axial direction of the induction sheet is distributed in a sine wave shape.
Preferably, the first receiving coil is wound on the circuit board along the circumferential direction for two circles, and after the first receiving coil is wound on one surface of the circuit board for an angle of half a loop period, the first receiving coil is wound on the other surface of the circuit board for an angle of half a loop period through the circuit board, so that the first receiving coil is repeatedly wound; projections of the two coils of the first receiving coil on the plane where the circuit board is located are staggered and complementary with each other, and projections of the two coils of the first receiving coil on the plane where the circuit board is located are overlapped to form a circular ring; the winding mode of the second receiving coil is the same as that of the first receiving coil.
Further preferably, the closed loops formed by the projections of the first receiving coil and the second receiving coil on the plane where the circuit board is located are all arranged in a fan shape.
Further preferably, the rotation deviation angle between the first receiving coil and the second receiving coil is 1/4 of the loop cycle angle of the transformer.
Preferably, the induction piece comprises an integrally formed ring piece and a plurality of convex teeth, the ring piece and the convex teeth are arranged on the same non-magnetic plate, the non-magnetic plate can be rotatably arranged on the measuring rotating shaft around the axis of the ring piece, and a gap is arranged between the non-magnetic plate and the circuit board; the ring piece and the convex teeth are positioned on the same plane, and the areas of the convex teeth are equal; the convex teeth are uniformly distributed along the circumferential direction of the ring piece, and a hollow part is arranged between two adjacent convex teeth; when the induction piece rotates, the area change rate of a single closed loop covered by a plurality of convex teeth along the axial direction of the induction piece is distributed in a sine wave shape.
Further preferably, the convex teeth are arranged in a sine wave shape, and the number of the convex teeth is equal to the number of the magnetic poles of the transformer; the outer diameter d1 of the ring piece is equal to the inner diameters d2 of the first receiving coil and the second receiving coil, and the distance r1 between the wave crest of the convex tooth and the coaxially arranged shaft center is equal to the outer radius r2 of the first receiving coil and the second receiving coil.
Still more preferably, in a circle formed by taking the coaxially arranged shaft center as a circle center and taking a distance r1 between the peak of each tooth and the coaxially arranged shaft center as a radius, the area of each tooth is equal to the area of a hollow part between two adjacent teeth.
Still more preferably, the ring piece and the convex teeth are both arranged on the same non-magnetic plate; the ring piece and the convex teeth of the induction piece are made of copper, aluminum or stainless steel.
Still further preferably, the processing circuit includes an inductance chip, a pin 1 of the inductance chip is connected to one end of the first resistor, and the other end of the first resistor is grounded; the pin 2 of the inductance chip is directly grounded; the pin 3 of the inductance chip is suspended; the pin 4 of the inductance chip is connected with a power supply and one end of the first capacitor, and the other end of the first capacitor is grounded; the pin 5 of the inductance chip is connected with a reference power supply and one end of a second capacitor, and the other end of the second capacitor is grounded; the pin 6 of the inductance chip outputs a sine signal; the pin 7 of the inductance chip outputs a cosine signal; the pin 8 of the inductance chip is connected with one end of the second receiving coil, the pin 10 of the inductance chip is connected with one end of the first receiving coil, the other end of the first receiving coil and the other end of the second receiving coil are both connected with one end of the fourth capacitor and one end of the fifth capacitor, the other end of the first receiving coil, the other end of the second receiving coil and the pin 9 of the inductance chip are all grounded, the other end of the fourth capacitor is respectively connected with one end of the excitation coil and the pin 13 of the inductance chip, the other end of the fifth capacitor is respectively connected with the other end of the excitation coil and the pin 12 of the inductance chip, and the middle tap of the excitation coil is connected with an excitation power supply; the pin 11 of the inductance chip is connected with one end of the third capacitor, and the other end of the third capacitor is connected with a power supply; the pins 14 of the inductive chip are grounded.
The invention has the beneficial effects that:
1) The rotary transformer comprises an induction piece and a stator which are coaxially arranged, wherein the stator comprises an exciting coil, a receiving coil and a processing circuit; the exciting coil is connected with the processing circuit, and the receiving coil comprises a first receiving coil and a second receiving coil which are respectively connected with the processing circuit; due to the adoption of the inductance type design of the structure, the rotary transformer is lighter in weight and lower in manufacturing cost, the adaptability of the size of the air gap between the induction piece and the stator in the installation process is better, and the input and output processing of signals is simpler due to the self-contained processing circuit.
2) The first receiving coil is wound on the circuit board along the circumferential direction for two circles, and after the first receiving coil is wound on one surface of the circuit board for an angle of half a loop period, the first receiving coil is wound on the other surface of the circuit board for an angle of half a loop period through the circuit board, so that the first receiving coil is repeatedly wound; projections of the two coils of the first receiving coil on the plane where the circuit board is located are staggered and complementary with each other, and projections of the two coils of the first receiving coil on the plane where the circuit board is located are overlapped to form a circular ring; the winding mode of the second receiving coil is the same as that of the first receiving coil; the above winding method of the receiving coil makes the induced electromotive forces generated between the forward and reverse loops of the single receiving coil cancel each other.
3) The induction piece comprises an integrally formed annular piece and a plurality of convex teeth, the convex teeth are uniformly distributed along the circumferential direction of the annular piece, and empty parts are arranged between adjacent convex teeth; the convex teeth are arranged in a sine wave shape, and the number of the convex teeth is equal to the number of the magnetic poles of the transformer; the outer diameter of the ring piece is equal to the inner diameters of the first receiving coil and the second receiving coil, and the distance between the wave crest of the convex tooth and the coaxially arranged shaft center is equal to the outer radius of the first receiving coil and the second receiving coil; when the induction piece rotates, the induced electromotive force generated by the receiving coil changes periodically, and the generated signal wave is sine and cosine wave, so that the rotating speed and the rotating angle of the rotor can be measured conveniently.
Drawings
Fig. 1 is a schematic diagram of a rotary transformer of the present invention.
Fig. 2 is a side view of the rotary transformer of the present invention.
Fig. 3 is a schematic view of an inductive pad of a resolver according to the present invention.
Fig. 4 is a schematic view of a stator of a resolver according to the present invention.
Fig. 5a, 5b and 5c are schematic views of the first coil, the second coil and the two coils of the first receiving coil of the present invention superimposed on a plane of the circuit board.
Fig. 6a, 6b and 6c are schematic diagrams of the first coil, the second coil and the projection of the two coils of the second receiving coil of the present invention superimposed on the plane of the circuit board respectively.
Fig. 7 is a schematic diagram of a processing circuit of the resolver of the present invention.
Fig. 8 is a waveform diagram of an output sine and cosine signal according to an embodiment of the present invention.
Reference numerals: the magnetic induction type magnetic induction coil comprises a 1-induction sheet, a 2-stator, a 11-ring sheet, 12-convex teeth, 13-nonmagnetic plates, 21-exciting coils, 22-receiving coils, 23-processing circuits, L1-first receiving coils, L2-second receiving coils, U1-inductance chips, R1-first resistors, C1-first capacitors, C2-second capacitors, C3-third capacitors, C4-fourth capacitors and C5-fifth capacitors.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
As shown in fig. 1 and 2, the sensor comprises a sensor 1 and a stator 2 which are coaxially arranged, wherein the sensor 1 is rotatably arranged on a measuring rotating shaft around the axis of the sensor 1, the stator 2 is arranged on a circuit board, and a gap is arranged between the sensor 1 and the circuit board;
the stator 2 comprises an excitation coil 21, a receiving coil 22 and a processing circuit 23; the exciting coil 21 is connected with the processing circuit 23, and the receiving coil 22 comprises a first receiving coil L1 and a second receiving coil L2 which are respectively connected with the processing circuit 23; the first receiving coil L1 and the second receiving coil L2 are both disposed inside the exciting coil 21;
the exciting coils 21 are wound for a plurality of circles along the circumferential direction by taking the axis of the stator 2 as the center of a circle, and the exciting coils 21 are distributed on any one of the two sides of the circuit board, or the exciting coils 21 are distributed on both sides of the circuit board;
the first receiving coil L1 is respectively wound on the circuit board along the circumferential direction for a plurality of circles, each circle is alternately wound on the front surface and the back surface of the circuit board, and the projection of the first receiving coil L1 on the plane where the circuit board is located forms a plurality of closed loops which are connected in sequence; the winding mode of the second receiving coil L2 is the same as that of the first receiving coil L1, and the first receiving coil L1 and the second receiving coil L2 are arranged by taking the coaxially arranged axle center as the center of a circle and rotating by a certain angle.
When the induction plate 1 rotates, the area change rate of a single closed loop covered by the induction plate 1 along the axial direction of the induction plate is distributed in a sine wave shape.
As shown in fig. 4, 5a, 5b, 5c, 6a, 6b, and 6c, thick lines and thin lines in fig. 5a, 5b, 5c, 6a, 6b, and 6c represent coils on different sides of the circuit board, respectively. The first receiving coil L1 and the second receiving coil L2 are wound on the circuit board along the circumferential direction for two circles, and after the first receiving coil L1 is wound on one surface of the circuit board for an angle of half a loop period, the first receiving coil L1 is wound on the other surface of the circuit board through the circuit board for an angle of half a loop period, so that the first receiving coil L1 is repeatedly wound; projections of the two coils of the first receiving coil L1 on the plane where the circuit board is located are staggered and are complementary to each other, namely, projections of the two coils of the first receiving coil L1 on the plane where the circuit board is located are crossed and complementary and do not coincide, and projections of the two coils of the first receiving coil L1 on the plane where the circuit board is located are overlapped to form a circular ring; the winding manner of the second receiving coil L2 is the same as that of the first receiving coil L1.
The closed loops formed by the projections of the first receiving coil L1 and the second receiving coil L2 on the plane where the circuit board is located are all arranged in a fan shape.
The rotation deviation angle between the first receiving coil L1 and the second receiving coil L2 is 1/4 of the loop cycle angle of the transformer.
As shown in fig. 3, the sensing piece 1 includes an integrally formed ring piece 11 and a plurality of teeth 12, the ring piece 11 and the teeth 12 are both disposed on the same non-magnetic plate 13, the non-magnetic plate 13 is rotatably disposed on a measurement rotating shaft around an axis of the ring piece 11, and a gap is disposed between the non-magnetic plate 13 and the circuit board; the ring piece 11 and the plurality of convex teeth 12 are positioned on the same plane, and the areas of the plurality of convex teeth 12 are equal in size; the plurality of convex teeth 12 are uniformly distributed along the circumferential direction of the ring piece 11, and a hollow part is arranged between two adjacent convex teeth 12; when the induction plate 1 rotates, the area change rate of a single closed loop covered by a plurality of convex teeth 12 along the axial direction of the convex teeth is distributed in a sine wave shape.
The convex teeth 12 are arranged in a sine wave shape, and the number of the convex teeth 12 is equal to the number of magnetic poles of the transformer; the outer diameter d1 of the ring piece 11 is equal to the inner diameters d2 of the first receiving coil L1 and the second receiving coil L2, and the distance r1 between the crest of the convex tooth 12 and the coaxially arranged axis is equal to the outer radius r2 of the first receiving coil L1 and the second receiving coil L2.
In a circle formed by taking the coaxially arranged shaft center as a circle center and taking a distance r1 between the crest of each convex tooth 12 and the coaxially arranged shaft center as a radius, the area of each convex tooth 12 is equal to the area of a hollow part between two adjacent convex teeth 12.
The ring piece 11 and the convex teeth 12 are arranged on the same non-magnetic plate; the ring piece 11 and the convex teeth 12 of the induction piece 1 are made of copper, aluminum or stainless steel.
As shown in fig. 7, the processing circuit 23 includes an inductance chip U1, a pin 1 of the inductance chip U1 is connected to one end of a first resistor R1, and the other end of the first resistor R1 is grounded; the pin 2 of the inductance chip U1 is directly grounded; pin 3 of the inductance chip U1 is suspended; the pin 4 of the inductance chip U1 is connected with a power supply and one end of the first capacitor C1, and the other end of the first capacitor C1 is grounded; the pin 5 of the inductance chip U1 is connected with a reference power supply and one end of the second capacitor C2, and the other end of the second capacitor C2 is grounded; the pin 6 of the inductance chip U1 outputs a sine signal; the pin 7 of the inductance chip U1 outputs a cosine signal; the pin 8 of the inductance chip U1 is connected with one end of the second receiving coil L2, the pin 10 of the inductance chip U1 is connected with one end of the first receiving coil L1, the other end of the first receiving coil L1 and the other end of the second receiving coil L2 are both connected with one end of the fourth capacitor C4 and one end of the fifth capacitor C5, the other end of the first receiving coil L1, the other end of the second receiving coil L2 and the pin 9 of the inductance chip U1 are all grounded, the other end of the fourth capacitor C4 is respectively connected with one end of the excitation coil 21 and the pin 13 of the inductance chip U1, the other end of the fifth capacitor C5 is respectively connected with the other end of the excitation coil 21 and the pin 12 of the inductance chip U1, and the middle tap of the excitation coil 21 is connected with an excitation power supply; the pin 11 of the inductance chip U1 is connected with one end of the third capacitor C3, and the other end of the third capacitor C3 is connected with a power supply; the pin 14 of the inductive chip U1 is grounded.
When in use, the invention can be matched with software in the prior art for use. The working principle of the invention is described below in connection with software in the prior art.
When the induction piece 1 of the rotary transformer does not rotate, the induced electromotive force in the first receiving coil L1 and the second receiving coil L2 is 0; when a direct current voltage is applied to the exciting coil 21, a strong magnetic field is generated, and the positive and negative loops of the receiving coil 22 are covered in sequence when the induction piece 1 rotates, and at this time, the induced electromotive forces generated by the first receiving coil L1 and the second receiving coil L2 are periodically changed. And a certain rotation deviation angle exists between the first receiving coil L1 and the second receiving coil L2, so that a corresponding electrical angle difference exists between the first receiving coil L1 and the second receiving coil L2, and the angle value at the moment can be obtained by carrying out algorithm analysis according to a cosine signal output by the pin 6 and a sine signal output by the pin 7 of the inductance chip U1.
The calculation formula of the rotation speed V can be obtained according to the formula f=pole×v/60:
V＝60*f/ploe
where f is the frequency of the sine and cosine signal output, pole represents the number of poles, and V represents the rotational speed.
Meanwhile, the rotation angle can be obtained according to the cosine signal output by the pin 6 and the sine signal output by the pin 7 of the inductance chip U1.
According to the formula tan θ=sinθ/cos θ=u1/u 2, a calculation formula of the rotation angle θ can be obtained:
θ＝artan(u1/u2)
wherein θ is a rotation angle, and u1 and u2 respectively represent a sine signal voltage and a cosine signal voltage at a time when the rotation angle θ is located.
The principle of measuring the rotational speed and the angle of the resolver according to the present invention will be described with reference to the drawings and the embodiments.
As shown in fig. 8, fig. 8 is a waveform diagram of sine and cosine signals output when the pole number pole is taken to be 2. The frequency f=168.6 Hz of the sine and cosine signals can be obtained through waveform display, and the rotating speed V of the current motor can be calculated as follows:
V＝60*168.6/2＝5058(RPM)
as shown in fig. 8, when two rotation angles θ1 and θ2 corresponding to the time shown in the figure are to be obtained, the sine signal voltage u1=1.5v, the cosine signal voltage u2=0.15v, and the sine signal voltage u3=1.9v and the cosine signal voltage u4=1.4v at the time of the rotation angle θ2 are obtained from the waveforms, and the rotation angles can be calculated:
θ1＝artan(u1/u2)＝artan1.5/0.15＝84.3°
θ2＝artan(u3/u4)＝artan1.9/1.4＝53.6°
therefore, the sine and cosine signals with a certain phase difference output by the rotary transformer do not need to be subjected to demodulation, phase compensation and other processes of some columns. The rotation speed and the angle can be measured by displaying the waveform of the output sine and cosine signals.
In summary, the invention provides an inductive rotary transformer which has better adaptability to the size of an air gap, low manufacturing cost, light weight and simpler operation and use.
Claims (8)
1. An inductive rotary transformer, characterized in that: the sensor comprises a sensor piece (1) and a stator (2) which are coaxially arranged, wherein the sensor piece (1) is rotatably arranged on a measuring rotating shaft around the axis of the sensor piece, the stator (2) is arranged on a circuit board, and a gap is arranged between the sensor piece (1) and the circuit board;
the stator (2) comprises an exciting coil (21), a receiving coil (22) and a processing circuit (23); the exciting coil (21) is connected with the processing circuit (23), and the receiving coil (22) comprises a first receiving coil (L1) and a second receiving coil (L2) which are respectively connected with the processing circuit (23); the first receiving coil (L1) and the second receiving coil (L2) are arranged on the inner side of the exciting coil (21);
the exciting coils (21) are wound for a plurality of circles along the circumferential direction by taking the axle center of the stator (2) as the center of a circle, the exciting coils (21) are distributed on any one of the two sides of the circuit board, or the exciting coils (21) are distributed on both sides of the circuit board;
the first receiving coil (L1) is wound on the circuit board along the circumferential direction for a plurality of circles, each circle is alternately wound on the front surface and the back surface of the circuit board, and the projection of the first receiving coil (L1) on the plane where the circuit board is located forms a plurality of closed loops which are connected in sequence; the winding mode of the second receiving coil (L2) is the same as that of the first receiving coil (L1), and the first receiving coil (L1) and the second receiving coil (L2) are arranged by taking the coaxially arranged axle center as the center of a circle and rotating by a certain angle;
when the induction piece (1) rotates, the area change rate of a single closed loop covered by the induction piece (1) along the axial direction of the induction piece is distributed in a sine wave shape;
the first receiving coil (L1) and the second receiving coil (L2) are wound on the circuit board along the circumferential direction for two circles, and after the first receiving coil (L1) is wound on one surface of the circuit board for an angle of half a loop period, the first receiving coil passes through the circuit board and is wound on the other surface of the circuit board for an angle of half a loop period, so that the first receiving coil and the second receiving coil are repeatedly wound; projections of the two coils of the first receiving coil (L1) on the plane where the circuit board is located are staggered and complementary to each other, and projections of the two coils of the first receiving coil (L1) on the plane where the circuit board is located are overlapped to form a circular ring; the winding mode of the second receiving coil (L2) is the same as the winding mode of the first receiving coil (L1).
2. An inductive rotary transformer according to claim 1, characterized in that: the closed loops formed by the projections of the first receiving coil (L1) and the second receiving coil (L2) on the plane where the circuit board is located are all arranged in a fan shape.
3. An inductive rotary transformer according to claim 1, characterized in that: the rotation deviation angle between the first receiving coil (L1) and the second receiving coil (L2) is 1/4 of the loop cycle angle of the transformer.
4. An inductive rotary transformer according to claim 1, characterized in that: the induction piece (1) comprises an integrally formed ring piece (11) and a plurality of convex teeth (12), the ring piece (11) and the convex teeth (12) are arranged on the same non-magnetic plate (13), the non-magnetic plate (13) can be arranged on a measuring rotating shaft in a rotating way around the axis of the ring piece (11), and a gap is arranged between the non-magnetic plate (13) and the circuit board; the ring piece (11) and the convex teeth (12) are positioned on the same plane, and the areas of the convex teeth (12) are equal; the plurality of convex teeth (12) are uniformly distributed along the circumferential direction of the ring piece (11), and a hollow part is arranged between two adjacent convex teeth (12); when the induction piece (1) rotates, the area change rate of a single closed loop covered by a plurality of convex teeth (12) along the axial direction of the induction piece is distributed in a sine wave shape.
5. An inductive rotary transformer according to claim 4, characterized in that: the convex teeth (12) are arranged in a sine wave shape, and the number of the convex teeth (12) is equal to the number of magnetic poles of the transformer; the outer diameter d1 of the ring piece (11) is equal to the inner diameter d2 of the first receiving coil (L1) and the second receiving coil (L2), and the distance r1 between the wave crest of the convex tooth (12) and the coaxially arranged shaft center is equal to the outer radius r2 of the first receiving coil (L1) and the second receiving coil (L2).
6. An inductive rotary transformer according to claim 5, characterized in that: in a circle formed by taking the coaxially arranged axle center as the center of a circle and taking the distance r1 between the crest of each convex tooth (12) and the coaxially arranged axle center as the radius, the area of each convex tooth (12) is equal to the area of a hollow part between two adjacent convex teeth (12).
7. An inductive rotary transformer according to claim 6, characterized in that: the ring piece (11) and the convex teeth (12) of the induction piece (1) are made of copper, aluminum or stainless steel.
8. An inductive rotary transformer according to claim 1, characterized in that: the processing circuit (23) comprises an inductance chip (U1), a pin 1 of the inductance chip (U1) is connected with one end of a first resistor (R1), and the other end of the first resistor (R1) is grounded; the pin 2 of the inductance chip (U1) is directly grounded; the pin 3 of the inductance chip (U1) is suspended; the pin 4 of the inductance chip (U1) is connected with a power supply and one end of the first capacitor (C1), and the other end of the first capacitor (C1) is grounded; the pin 5 of the inductance chip (U1) is connected with a reference power supply and one end of the second capacitor (C2), and the other end of the second capacitor (C2) is grounded; the pin 6 of the inductance chip (U1) outputs a sine signal; the pin 7 of the inductance chip (U1) outputs a cosine signal; the pin 8 of the inductance chip (U1) is connected with one end of the second receiving coil (L2), the pin 10 of the inductance chip (U1) is connected with one end of the first receiving coil (L1), the other end of the first receiving coil (L1) and the other end of the second receiving coil (L2) are both connected with one end of the fourth capacitor (C4) and one end of the fifth capacitor (C5), the other end of the first receiving coil (L1), the other end of the second receiving coil (L2) and the pin 9 of the inductance chip (U1) are grounded, the other end of the fourth capacitor (C4) is respectively connected with one end of the excitation coil (21) and the pin 13 of the inductance chip (U1), the other end of the fifth capacitor (C5) is respectively connected with the other end of the excitation coil (21) and the pin 12 of the inductance chip (U1), and the middle tap of the excitation coil (21) is connected with an excitation power supply; the pin 11 of the inductance chip (U1) is connected with one end of the third capacitor (C3), and the other end of the third capacitor (C3) is connected with a power supply; the pin 14 of the inductive chip (U1) is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810634482.4A CN108917796B (en) | 2018-06-20 | 2018-06-20 | Inductive rotary transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810634482.4A CN108917796B (en) | 2018-06-20 | 2018-06-20 | Inductive rotary transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108917796A CN108917796A (en) | 2018-11-30 |
| CN108917796B true CN108917796B (en) | 2024-01-30 |
Family
ID=64420710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810634482.4A Active CN108917796B (en) | 2018-06-20 | 2018-06-20 | Inductive rotary transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108917796B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109682295B (en) * | 2018-12-29 | 2024-04-09 | 上海精传电子科技有限公司 | Integrated differential angle measurement inductance sensor |
| CN110887512B (en) * | 2019-11-15 | 2024-05-28 | 东北林业大学 | Double-magnetic focusing rotation speed, torque and angle sensor and calculation method of rotation speed, torque and angle |
| JP7334367B2 (en) * | 2020-12-11 | 2023-08-28 | マブチモーター株式会社 | Resolver |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002188938A (en) * | 2000-12-21 | 2002-07-05 | M Syst Giken:Kk | Rotation angle detector |
| CN102428350A (en) * | 2009-05-15 | 2012-04-25 | 泰科电子比利时公司 | Magnetoelectronic angle sensor, in particular a reluctance resolver |
| CN104061854A (en) * | 2014-05-11 | 2014-09-24 | 浙江大学 | PCB coil and angle measuring method for electromagnetic induction type angle sensor apparatus |
| CN106712428A (en) * | 2017-01-16 | 2017-05-24 | 上海世昱电子技术有限公司 | Rotary transformer and rotation body with same |
| CN206686061U (en) * | 2017-01-16 | 2017-11-28 | 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 |
| CN207021917U (en) * | 2017-03-07 | 2018-02-16 | 赛卓电子科技（上海）有限公司 | Position sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014210014A1 (en) * | 2014-05-26 | 2015-11-26 | Schaeffler Technologies AG & Co. KG | Resolver, resolver and process for its production |
-
2018
- 2018-06-20 CN CN201810634482.4A patent/CN108917796B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002188938A (en) * | 2000-12-21 | 2002-07-05 | M Syst Giken:Kk | Rotation angle detector |
| CN102428350A (en) * | 2009-05-15 | 2012-04-25 | 泰科电子比利时公司 | Magnetoelectronic angle sensor, in particular a reluctance resolver |
| CN104061854A (en) * | 2014-05-11 | 2014-09-24 | 浙江大学 | PCB coil and angle measuring method for electromagnetic induction type angle sensor apparatus |
| CN106712428A (en) * | 2017-01-16 | 2017-05-24 | 上海世昱电子技术有限公司 | Rotary transformer and rotation body with same |
| CN206686061U (en) * | 2017-01-16 | 2017-11-28 | 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 |
| CN207021917U (en) * | 2017-03-07 | 2018-02-16 | 赛卓电子科技（上海）有限公司 | Position sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108917796A (en) | 2018-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108917796B (en) | Inductive rotary transformer | |
| US9829501B2 (en) | Rotational sensing based on inductive sensing | |
| CN104864804B (en) | Time grating angular displacement sensor | |
| CN105431740B (en) | Aircraft wheel velocity sensor | |
| CN102959362A (en) | Angle detection device | |
| EP2853861B1 (en) | Position detection device | |
| JP5927891B2 (en) | Rotation angle detector | |
| CN105850014A (en) | Resolver device, motor, and actuator | |
| EP2585798A2 (en) | A resolver | |
| US8384377B2 (en) | Self-powered magnetic tachometer for supplying a signal representative of rotational rate and absolute position | |
| CN108027253A (en) | Brushless resovler and rotation angle detection apparatus | |
| CN110967134A (en) | Magnetic precise constraint type magnetic focusing torque sensor and torque calculation method | |
| JP3085989B2 (en) | A device for inductively transmitting measured electricity and / or electric energy between a rotor and a stator without contact | |
| CN206574593U (en) | A kind of rotary transformer | |
| JP2009097910A (en) | Wire rope flaw detection device | |
| CN210981298U (en) | Magnetic focusing split type integrated sensor | |
| CN102620641B (en) | A kind of shaft position sensor | |
| CN104483510B (en) | A kind of measuring method for measuring rotary acceleration sensors | |
| JP4336070B2 (en) | Rotary position detector | |
| CN211178307U (en) | Reluctance type angle sensor | |
| WO2022124413A1 (en) | Resolver | |
| CN210156247U (en) | Winding structure of angle sensor | |
| CN211147914U (en) | Magnetic accurate constraint type magnetic focusing torque sensor | |
| CN208921144U (en) | A kind of inductance type rotary transformer | |
| CN107623422B (en) | A kind of motor of highly reliable compact three-dimensional flux circuit and its application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |