CN108574430A - Position sensor - Google Patents
Position sensor Download PDFInfo
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- CN108574430A CN108574430A CN201710134058.9A CN201710134058A CN108574430A CN 108574430 A CN108574430 A CN 108574430A CN 201710134058 A CN201710134058 A CN 201710134058A CN 108574430 A CN108574430 A CN 108574430A
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- receiving coil
- position sensor
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- excitation coil
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
The present invention provides a kind of position sensor, including：Stator modules, the stator modules include excitation coil and receiving coil；The wherein described excitation coil is used to, by high frequency periodic alternating voltage and electric current, alternating electromagnetic field is generated in the stator modules region；The receiving coil is arranged in the alternating electromagnetism field areas that the excitation coil generates, and generates induced electromotive force；Rotor module, the rotor module are used to influence to swash the electromagnetic coupling strengths between the excitation coil and the receiving coil；Processing circuit, encoded signal needed for the voltage signal output motor that the processing circuit processes are obtained from the receiving coil.Compared with prior art, the present invention has the following advantages：1) firm sensor structure.2) signal resolution is improved.3) a variety of output signal types.4) mounting means is flexibly applied.
Description
Technical field
The present invention relates to a kind of novel electromagnetic induction type encoders, are more particularly without limitation, to a kind of for generating motor
The induction position sensor of required encoded signal.
Background technology
As motor is in the continuous application and popularization of the industries such as military affairs, space equipment, automobile and medical treatment, industry is in selection electricity
To being presented with harsher requirement under its service life, cost and adverse circumstances when machine.And as detection and feedback motor position
The encoder set opens very important effect in motor control, and a outstanding encoder has been largely fixed electricity
The performance of machine, at present motor encoder scheme include mainly：
Photoelectric encoder
Working method：It is a kind of that geometry of machinery displacement on output shaft is converted by pulse or digital quantity by opto-electronic conversion
Sensor, be at present apply most sensors.It is generally made of grating disc and Electro-Optical Sensor Set, when grating disc rotates
When, the detection device detection through the electronic components such as light emitting diode composition exports several pulse signals.
Defect：Grating disc is frangible, be vulnerable to greasy dirt and the pollutions such as dust cause dropout
Hall magnetic sensor
Working method：Hall sensor is fixed on stator, when the poles S of rotor magnetic steel and the poles N are passed through Hall and passed successively
When sensor, Hall sensor exports low and high level position signal, then is input in electric machine controller and carries out commutation.
Defect：Sensor installation form is complicated, and under severe electromagnetic field working environment, Hall sensor is easily damaged or burnt
It ruins.
Magnetic rotary encoder
Working method：One round radial magnetizing magnet is fixed on above or below IC by the program, magnet rotation one
In week, it is 360 degree of sine wave signal that IC, which obtains a cycle, then handles by back end signal to obtain square wave.
Defect：Magnet, which moves back, under high temperature causes signal accuracy to reduce；Magnet magnetizes, and technology requirement is high, and especially the pole N, S connects
Place magnetize it is uneven cause sine wave signal to be distorted, output signal accuracy reduce；Installation accuracy requires height, shock resistance poor；It can only
Mounted on machine shaft end.
Above scheme has different degrees of defect in reliability, precision, output signal type and mounting means etc..
Therefore, nowadays there is an urgent need to a kind of new position sensors in market, to overcome the defect present in present scheme.
Invention content
For the defects in the prior art, present invention aims at a kind of solution said programs of offer in sensor rapid wear
The position sensor of bad, signal resolution, output form and mounting means etc. defect.
In order to solve the above technical problems, the present invention provides a kind of position sensor, including：Stator modules, the stator mould
Block includes excitation coil and receiving coil；The wherein described excitation coil is used to pass through high frequency periodic alternating voltage and electric current,
Alternating electromagnetic field is generated in the stator modules region；The alternating electromagnetism generated in the excitation coil is arranged in the receiving coil
In field areas, and generate induced electromotive force；Rotor module, the rotor module is for influencing to swash the excitation coil and described connect
Electromagnetic coupling strengths between take-up circle；Processing circuit, the voltage that the processing circuit processes are obtained from the receiving coil
Encoded signal needed for signal output motor.
Preferably, the rotor module includes metal derby, sheet metal or carrier and the conduction that is arranged on the carrier
Part；The wherein described carrier is that regular polygon or fan are annular, preferably circular.
Preferably, the conduct piece is metal, is closed multi-circle spiral flow shape plain conductor, is closed plain conductor or conducting resinl.
Preferably, the conduct piece is fan annular, closed helical shape, sector or class sinusoidal.
Preferably, the quantity of the rotor module is one or more.
Preferably, the excitation coil is connected in series by a circle or multi-turn plain conductor, preferably along the circumferential direction coiling
Plain conductor be connected in series.
Preferably, the excitation coil is arranged in the outer ring of the receiving coil and/or inner ring；The excitation coil and institute
State the setting of receiving coil staggered floor.
Preferably, the receiving coil includes one or more receiving units.
Preferably, the receiving unit includes fan annular, closed helical shape or the class sinusoidal figure in one or more periods
Shape.
Preferably, the processing circuit includes at least oscillating circuit and signal calculation circuit；The wherein described oscillating circuit is matched
It closes the excitation coil and generates high frequency periodic alternating voltage and electric current, the signal calculation circuit is for handling receiving coil
Coupled signal and output position encoded signal；The encoded position signal is UVW, orthogonal AB, linear analogue output, PWM or just
Cosine signal.
Compared with prior art, the present invention has the following advantages：
1) firm sensor structure is easier to reinforce rotor module and electricity using the material (such as metal) of high mechanical strength
Connection between machine shaft, in the case where rotating speed is too fast because itself material it is firm will not deform, the feelings of fragmentation
Condition.
2) signal resolution is improved, it is specific several that there is the receiving coil on stator modules one or more to be repeated cyclically
What graphic structure feature, geometric figure include fan-shaped, closed helical shape and class sinusoidal.The receiving coil repetition period is more,
The reception number of signals obtained in measured angular range is more, and the resolution ratio of output signal is higher, and doing so can improve
Encoded signal precision, while accelerating processing circuit calculating speed.
3) a variety of output signal types, signal processing circuit pass through for handling the voltage signal generated on receiving coil
After demodulation, amplification and processing, a variety of motor encoder signals of final output, such as UVW, orthogonal AB, linear analogue output, PWM and just
The motor position signals such as cosine signal, diversified output form can meet the needs of client's different application.
4) mounting means is flexibly applied, sensor is installed inside the shell, and is installed and applied in a manner of wearing axis, also may be used
In a manner of taking shaft end to install according to electric machine structure limitation or side is installed.Various mounting means ensure that this hair
Electromagnetic induction type encoder involved in bright can be nimbly and freely in all types of motor applications.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature mesh of the invention
And advantage will become more apparent upon.
Fig. 1 is that position sensor of the present invention uses schematic diagram；
Fig. 2 a are one structural schematic diagram of position sensor rotor module example of the present invention；
Fig. 2 b are two structural schematic diagram of position sensor rotor module example of the present invention；
Fig. 2 c are three structural schematic diagram of position sensor rotor module example of the present invention；
Fig. 2 d are four structural schematic diagram of position sensor rotor module example of the present invention；
Fig. 2 e are five structural schematic diagram of position sensor rotor module example of the present invention；
Fig. 2 f are six structural schematic diagram of position sensor rotor module example of the present invention；
Fig. 3 a are one structural schematic diagram of position sensor excitation coil example of the present invention；
Fig. 3 b are two structural schematic diagram of position sensor excitation coil example of the present invention；
Fig. 3 c are three structural schematic diagram of position sensor excitation coil example of the present invention；
Fig. 4 a are one structural schematic diagram of position sensor receiving coil example of the present invention；
Fig. 4 b are two structural schematic diagram of position sensor receiving coil example of the present invention；
Fig. 4 c are three structural schematic diagram of position sensor receiving coil example of the present invention；
Fig. 4 d are four structural schematic diagram of position sensor receiving coil example of the present invention；
Fig. 5 is position sensor processing circuit flow diagram of the present invention.
Specific implementation mode
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.
Fig. 1 is the common installation sectional view of electromagnetic induction type encoder of the present invention.According to Fig. 1, with axial line 6
The machine shaft 4 of rotation is installed across center sensor via.Rotor module 1 is fixed in shaft 4, and it is fixed that stator modules 2 pass through
Position axis 5 is mounted on encoder shell 8, and processing circuit 3 is placed on stator modules 2, and encoder shell 8 passes through screw hole 7
It is fixed on brshless DC motor.Rotor module 1 is close to each other with stator circuit 2, parallel and coaxial placement, all by encoder outside
In shell 8 is wrapped in.Electromagnetic induction type encoder according to the present invention possesses flexible installation form, and as shown in Figure 1 wears axis
Using.It can also be limited according to electric machine structure and take the mode that shaft end is installed or side is installed.Various mounting means
It ensure that electromagnetic induction type encoder involved in the present invention can be nimbly and freely in all types of motor applications.
Fig. 2 a-2f illustrate a variety of realization methods of rotor module and its design feature.
Rotor module shown in Fig. 2 a is the special pattern sheet metal (block) that electromagnetic induction material is made, geometric figure
Including fan annular, closed helical shape or class sinusoidal.
As shown in Figure 2 a, rotor module include along the circumferential direction 4 be mounted on carrier 11 geometries are identical, the period
Property repeat solid metal blades 11-1,11-2,11-3 and 11-4, metal blade pattern be fan annular.
Rotor module shown in Fig. 2 b-2e is that being repeated cyclically with one or more for electromagnetic induction material composition is specific
Geometric figure is covered on the carrier of non electromagnetic induction material making, and geometric figure includes fan annular, closed helical shape or class
Sinusoidal.
As shown in Figure 2 b, rotor module is along the circumferential direction comprising the conducting resinl that 8 geometries are identical, are repeated cyclically
12-1,12-2,12-3,12-4,12-5,12-6,12-7 and 12-8, conducting resinl shape are fan annular, and uniform fold is in insulation material
Expect on carrier 13.
As shown in Figure 2 c, rotor module is along the circumferential direction comprising the closure multi-turn that 8 geometries are identical, are repeated cyclically
Spirality metal conducting wire 14-1,14-2,14-3,14-4,14-5,14-6,14-7 and 14-8, plain conductor are covered in insulating materials
On the tow sides of carrier 13.
As shown in Figure 2 d, rotor module is along the circumferential direction comprising the solid metal that 8 geometries are identical, are repeated cyclically
Fan-shaped 15-1,15-2,15-3,15-4,15-5,15-6,15-7 and 15-8, solid metal sector are covered in insulating materials carrier 13
On.
Rotor module shown in Fig. 2 e is closed plain conductor 16 by one and constitutes, which along the circumferential direction paints
It is formed with the class sine curve that 8 geometries are identical, are repeated cyclically.It is closed plain conductor 16 and is covered in insulating materials carrier 13
Tow sides on.
Rotor module shown in Fig. 2 f is the tool that the conducting wire that electromagnetic induction material makes is wound in the making of non electromagnetic induction material
Have on the particular geometric figure carrier that one or more are repeated cyclically, geometric figure include fan-shaped, closed helical shape or class just
String shape.
As shown in figure 2f, be closed multi-turn plain conductor 10 be wound in an angle of coverage ranging from any angle (such as 90 ° or
180 ° etc.) fan annular insulating material 9 on.
Electromagnetic induction type encoder according to the present invention, identical comprising one or more geometries in rotor module,
The particular geometric figure being repeated cyclically, geometric figure include fan annular, closed helical shape and class sinusoidal.In order to facilitate letter
It number detection and calculates, geometry of the geometric figure and repetition period drawn in rotor module generally with receiving coil on stator modules
Figure and repetition period are consistent, but can also be different in practical application.
The electromagnetic induction material and non electromagnetic induction material of composition rotor module according to the present invention generally use machinery
The high material of intensity, because in practical applications, common material is be easy to cause in the case that motor speed is too fast (as printed electricity
Road plate) deform, fragmentation situations such as, cause the damage to motor and sensor itself.And use the material of high mechanical strength
(such as metal) is easier to reinforce the connection between rotor module and machine shaft, in the case where rotating speed is too fast because of itself material
It is firm will not deform, fragmentation the case where.But if only changing printed circuit board material into solid metallic materials, though
Influence of the vortex field that sensor mechanism intensity can so be reinforced, but generated in solid metal to receiving coil is uneven, meeting
Cause the voltage signal curve on receiving coil to be affected, reduces the precision of output signal.So the present invention is by common material
While changing material (such as metal) of high mechanical strength into, modify its shape (as being closed plain conductor) so that final
Geometric figure in the rotor module of forming is similar with the geometric figure of receiving coil, and the vortex field that rotor module generates will be uniform
Receiving coil is influenced, makes the voltage signal on receiving coil keep stablizing, improves the precision of output signal.
Electromagnetic induction type encoder according to the present invention, rotor module are activated the influence of coil alternating electromagnetic field
And vortex field is generated, to weaken the electromagnetic field on excitation coil.Due to the geometry in particular of rotor module, vortex field Yan Te
Fixed line, i.e. circumferencial direction change excitation electromagnetic field.The induction electric that non-uniform excitation electromagnetic field will cause in receiving coil
Gesture changes, and its variation is different according to rotor and the relative angular position of receiving coil.
Electromagnetic induction type encoder of the present invention, excitation coil are located on stator modules, by 1 circle or the gold of multi-turn
Belong to conducting wire to be connected in series, the plain conductor of preferably along the circumferential direction coiling is connected in series.
Fig. 3 a are one schematic diagram of excitation coil example.
As shown in Figure 3a, excitation coil can be placed on the outer ring (or inner ring) of receiving coil.Excitation coil 19 is placed
In the outer ring of receiving coil 18, it is connected in series by 5 circle concentric metal conducting wire 19-3, both ends are connected by through-hole 19-1 with 19-2
To processing circuit.
Fig. 3 b are two schematic diagram of excitation coil example.
As shown in Figure 3b, excitation coil is positioned over the Internal and external cycle of receiving coil simultaneously.Excitation coil 20 is positioned over connects simultaneously
Inside and outside take-up circle 18, by 5 circle concentric metal conducting wire 20-3 of outer ring and 5 circle concentric metal conducting wire 20-4 series connection of inner ring
At 20 both ends of excitation coil are connected to processing circuit by through-hole 20-1 and 20-2.
Fig. 3 c are three schematic diagram of excitation coil example.
As shown in Figure 3c, if installation space is restricted, excitation coil can be placed in parallel under receiving coil
To save the area of stator modules.Excitation coil 21 is placed in parallel under receiving coil 18, is led by 4 circle circular concentric metals
Line 21-3 is connected in series, and 21 both ends of excitation coil are connected to processing circuit by through-hole 21-1 and 21-2.
Electromagnetic induction type encoder of the present invention, excitation coil are connected with processing circuit, for passing through high frequency
Periodic AC voltage and electric current generate alternating electromagnetic field in stator modules region.
Electromagnetic induction type encoder of the present invention, receiving coil are located on stator modules, and receiving coil includes 1
Or multiple receiving coils, there are specific angular phase is poor between adjacent reception coil.Each receiving coil has one or more
The particular geometric graphic structure feature being repeated cyclically, geometric figure include class sinusoidal, fan annular or closed helical shape.
Fig. 4 a are one schematic diagram of receiving coil example.
As shown in fig. 4 a, on stator modules excitation line is placed on including 3 receiving coils 23,24 and 25,3 receiving coils
22 inside of circle.There are specific angular phase is poor between 3 receiving coils are adjacent.Every group of receiving coil is along the circumferential direction used respectively
Processing circuit is accessed in plain conductor coiling class sinusoidal, 23 both ends of receiving coil by through-hole 23-1 and 23-2, and formation is closed back
Road.Processing circuit is accessed in 24 both ends of receiving coil by through-hole 24-1 and 24-2, forms closed circuit.25 both ends of receiving coil are logical
Through-hole 25-1 and 25-2 access processing circuit is crossed, closed circuit is formed.Such sinusoidal pattern spatially has periodical weight
Multiple feature.3 groups can be obtained within the scope of specific period using above-mentioned receiving coil there is special angle phase between each other
The reception signal of difference.
Fig. 4 b are two schematic diagram of receiving coil example.
As shown in Figure 4 b, it is placed on including 27,2 receiving coils of 2 receiving coils 26 and receiving coil on stator modules
22 inside of excitation coil.There are specific angular phase is poor between 2 receiving coils are adjacent.Every group of receiving coil difference is circumferentially
Circular pattern is fanned in plain conductor coiling clockwise in direction, and 26 both ends of receiving coil pass through through-hole 26-1 and 26-2 access processing electricity
Road forms closed circuit.Processing circuit is accessed in 27 both ends of receiving coil by through-hole 27-1 and 27-2, forms closed circuit.Often
The characteristics of fan circular pattern on a receiving coil is spatially repeated cyclically.It can be in spy using above-mentioned receiving coil
2 groups of reception signals that there is special angle phase difference between each other are obtained within the scope of fixed cycle.
Fig. 4 c are three schematic diagram of receiving coil example.
As illustrated in fig. 4 c, closing including 1 angle of coverage ranging from any angle (such as 90 ° or 180 °) on stator modules
Spiral shape receiving coil 28 is closed, 22 inside of excitation coil is placed on.Receiving coil 28 along the circumferential direction uses plain conductor coiling
Processing circuit is accessed in the both ends of closed helical shape pattern, plain conductor by through-hole 28-1 and 28-2, forms closed circuit.Using
Above-mentioned receiving coil can obtain 1 group of reception signal within the scope of specific period.
Fig. 4 d are four schematic diagram of receiving coil example.
As shown in figure 4d, the combination of receiving coil is included on stator modules, solid line is receiving coil 29 and receiving coil 30
(processing circuit is accessed in 29 both ends of receiving coil by through-hole 29-1 and 29-2, forms closed circuit, 30 both ends of receiving coil pass through
Through-hole 30-1 and 30-2 access processing circuit, form closed circuit), wherein receiving coil 29 and receiving coil 30 is equivalent to Fig. 4 a
(23 both ends of receiving coil are connect the receiving coil 23 and receiving coil 24 of shown receiving coil example one by through-hole 23-1 and 23-2
Enter processing circuit, form closed circuit, processing circuit is accessed in 24 both ends of receiving coil by through-hole 24-1 and 24-2, is formed and is closed
Circuit).Dotted line is that (31 both ends of receiving coil pass through through-hole 31-1 and 31-2 access processing electricity for receiving coil 31 and receiving coil 32
Road forms closed circuit, and processing circuit is accessed in 32 both ends of receiving coil by through-hole 32-1 and 32-2, forms closed circuit),
Middle receiving coil 31 and receiving coil 32 are equivalent to the receiving coil 26 and receiving coil 27 of receiving coil example two shown in Fig. 4 b
(processing circuit is accessed in 26 both ends of receiving coil by through-hole 26-1 and 26-2, forms closed circuit, 27 both ends of receiving coil pass through
Through-hole 27-1 and 27-2 access processing circuit, form closed circuit).Receiving coil 31 and receiving coil 32 are placed in parallel in reception
30 downside of coil 29 and receiving coil.Receiving coil (29,30,31,32) is both placed in 22 inside of excitation coil.It is connect using above-mentioned
Take-up circle can obtain 4 groups of reception signals within the scope of specific period.
Electromagnetic induction type encoder of the present invention, receiving coil are located at the alternating electromagnetism place of excitation coil generation
In domain, according to Faraday's electromagnetic induction law it is found that the magnetic flux by closing coil changes, it can be produced on closing coil
Raw induced electromotive force.Therefore, corresponding induced electromotive force will be generated on receiving coil, then input processing circuit is calculated.
The geometric figure drawn in rotor module in order to facilitate signal test and evaluation and repetition period generally with stator mould
The geometric figure of receiving coil and repetition period are consistent on block, but can also be different in practical application.
Electromagnetic induction type encoder of the present invention, the receiving coil on stator modules have one or more periods
Property repeat particular geometric graphic structure feature, geometric figure include class sinusoidal, fan annular or closed helical shape.Receive line
The circle repetition period is more, and the reception number of signals obtained in measured angular range is more, and the resolution ratio of output signal is higher,
Encoded signal precision can be improved by doing so, while accelerate processing circuit calculating speed.
Electromagnetic induction type encoder of the present invention, receiving coil and excitation coil are placed on one piece of non-electrical magnetic strength
It answers in plate of material, such as printed circuit board (PCB).
Electromagnetic induction type encoder of the present invention, processing circuit can be placed on the non electromagnetic induction of stator modules
In plate of material, it can also be placed on elsewhere.Processing circuit can be the peripheral circuit built by discrete device, can also be one
ASIC dedicated processes chips.
Electromagnetic induction type encoder of the present invention, internal includes an oscillating circuit and signal processing circuit.
Electromagnetic induction type encoder of the present invention, oscillating circuit generate high frequency week for generating cooperation excitation coil
Phase property alternating voltage and electric current.
As shown in figure 5, electromagnetic induction type encoder of the present invention, signal processing circuit is for handling receiving coil
The voltage signal of upper generation, after demodulation, amplification and the processing of other computing modules, a variety of motor encoder signals of final output,
Such as UVW, orthogonal AB, linear analogue output, PWM and cosine and sine signal motor position signal.Diversified output form can be with
Meets the needs of client's different application.
Based on above-mentioned electromagnetic induction type encoder framework, motor application working method is as follows：
1) after electric machine controller is powered to electromagnetic induction type encoder, processing circuit coordinates excitation coil to generate high frequency week
Phase property alternating voltage and electric current, alternating electromagnetic field will be formed in stator modules region by flowing through the alternating current of excitation coil.
2) according to Faraday's electromagnetic induction law it is found that the magnetic flux by closing coil changes, meeting is in closed line
Induced electromotive force is generated on circle.When the alternating electromagnetic field generated on excitation coil, which passes through, is closed receiving coil, due to by closing
Alternation occurs for the magnetic flux for closing receiving coil, and the identical alternation induced electromotive force of frequency is generated on each sector (-shaped) coil.
3) rotor module is used to influence the coupled relation between excitation coil and receiving coil, when motor rotates, drives
Rotor module rotates together, and the alternating electromagnetic field of excitation coil makes rotor module generate vortex field, to weaken excitation coil
Electromagnetic field.Non-uniform electromagnetic field will cause the induced electromotive force on receiving coil to change.When rotor module and stator
When opposite variation occurs for module, one or more periodically variable voltage signal curves are obtained on receiving coil, pass through processing
Encoded signal needed for motor is obtained after circuit counting.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or change within the scope of the claims, this not shadow
Ring the substantive content of the present invention.In the absence of conflict, the feature in embodiments herein and embodiment can arbitrary phase
Mutually combination.
Claims (10)
1. a kind of position sensor, which is characterized in that including：
Stator modules, the stator modules include excitation coil and receiving coil；Wherein
The excitation coil is used to, by high frequency periodic alternating voltage and electric current, alternation is generated in the stator modules region
Electromagnetic field；
The receiving coil is arranged in the alternating electromagnetism field areas that the excitation coil generates, and generates induced electromotive force；
Rotor module, the electromagnetic coupling that the rotor module is used to influence to swash between the excitation coil and the receiving coil are strong
Degree；
Processing circuit encodes letter needed for the voltage signal output motor that the processing circuit processes are obtained from the receiving coil
Number.
2. position sensor according to claim 1, which is characterized in that the rotor module includes metal derby, sheet metal
Or carrier and the conduct piece that is arranged on the carrier；The wherein described carrier is regular polygon or fan annular, is preferably justified
Shape.
3. position sensor according to claim 2, which is characterized in that the conduct piece is metal, is closed multi-circle spiral flow
Shape plain conductor is closed plain conductor or conducting resinl.
4. position sensor according to claim 2, which is characterized in that the conduct piece be fan annular, closed helical shape,
Fan-shaped or class sinusoidal.
5. position sensor according to claim 1, which is characterized in that the quantity of the rotor module is one or more
It is a.
6. position sensor according to claim 1, which is characterized in that the excitation coil is led by a circle or multi-turn metal
Line is connected in series, and the plain conductor of preferably along the circumferential direction coiling is connected in series.
7. position sensor according to claim 6, which is characterized in that the excitation coil is arranged in the receiving coil
Outer ring and/or inner ring；The excitation coil and receiving coil staggered floor setting.
8. position sensor according to claim 1 or claim 7, which is characterized in that the receiving coil includes one or more
Receiving unit.
9. position sensor according to claim 8, which is characterized in that the receiving unit includes one or more periods
Fan annular, closed helical shape or class sinusoidal pattern.
10. position sensor according to claim 1, which is characterized in that the processing circuit includes at least oscillating circuit
And signal calculation circuit；Wherein
The oscillating circuit coordinates the excitation coil to generate high frequency periodic alternating voltage and electric current, the signal calculation circuit
Coupled signal for handling receiving coil and output position encoded signal；
The encoded position signal is UVW, orthogonal AB, linear analogue output, PWM or cosine and sine signal.
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| CN201710134058.9A CN108574430A (en) | 2017-03-07 | 2017-03-07 | Position sensor |
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| CN201710134058.9A CN108574430A (en) | 2017-03-07 | 2017-03-07 | Position sensor |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109631958A (en) * | 2018-11-28 | 2019-04-16 | 赛卓电子科技（上海）有限公司 | Position coder |
| CN111285025A (en) * | 2020-02-11 | 2020-06-16 | 赛卓电子科技（上海）有限公司 | Servo direct-drive electric roller |
| CN112311156A (en) * | 2020-10-21 | 2021-02-02 | 上海俊烈汽车科技有限公司 | Rotor position sensor suitable for brushless motor and brushless motor |
| CN112350524A (en) * | 2020-10-21 | 2021-02-09 | 上海俊烈汽车科技有限公司 | Rotor position sensor of motor and motor |
| CN112857407A (en) * | 2019-11-27 | 2021-05-28 | 英飞凌科技股份有限公司 | Inductive angle sensor with distance value determination |
| CN113661371A (en) * | 2019-07-23 | 2021-11-16 | 比尔传感和控制公司 | Position sensor system |
| WO2022062996A1 (en) * | 2020-09-24 | 2022-03-31 | 苏州赛得尔智能科技有限公司 | Sine and cosine position encoder applicable to stator magnetic track free linear motor |
| CN114838655A (en) * | 2022-04-12 | 2022-08-02 | 北京科技大学 | Multicycle bipolar electromagnetic induction type angle sensor |
| CN116635696A (en) * | 2020-12-14 | 2023-08-22 | 微芯片技术股份有限公司 | High resolution angle sensing sensor and associated methods of use |
| CN118129803A (en) * | 2024-05-10 | 2024-06-04 | 上海钧嵌传感技术有限公司 | Eddy current sensor and eddy current device |
| CN118274886A (en) * | 2024-04-01 | 2024-07-02 | 上海弓望电子科技有限公司 | Radial magnetic flux structure applied to inductive encoder |
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