CN101860301B - Device for detecting position of electric machine rotor - Google Patents
Device for detecting position of electric machine rotor Download PDFInfo
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- CN101860301B CN101860301B CN201010164785A CN201010164785A CN101860301B CN 101860301 B CN101860301 B CN 101860301B CN 201010164785 A CN201010164785 A CN 201010164785A CN 201010164785 A CN201010164785 A CN 201010164785A CN 101860301 B CN101860301 B CN 101860301B
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- rotor
- optical fiber
- electric machine
- disc
- double joint
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Abstract
The invention relates to a device for detecting position of an electric machine rotor. The device is characterized in that a reflecting coded disc 4 which is coaxially arranged with the rotor is arranged on the rotor 5; armoured two-piece optical fibres are fixed to an electric machine shell 3 through thread, wherein the armoured two-piece optical fibre 1 is connected with a light emitter 8 and the armoured two-piece optical fibre 2 is connected with a light receiver 7; the light receiver outputs a converted electric signal to a detection circuit; and the reflecting coded disc is a steel fluted disc, the number of the salient poles is the same as that of the poles of the electric machine rotor, and the width of the male and female face is of the same radian as that of the male and female face of the rotor. The device can be applied to the switched reluctance motor, the permanent magnet synchronous motor, the step motor and the like; and the electric machine using the device can be widely and suitably used in the high temperature working environment such as the electric machine and apparatus for petroleum exploration, mining, ships and the like.
Description
Technical field
The present invention relates to a kind of device that detects motor rotor position, belong to the Electric Machine Control measuring technique.
Background technology
Along with the lifting of the expansion in motor application field and Electric Machine Control algorithm and strategy, make high temperature resistant, anti-strong electromagnetic, the means that satisfy the high Precision Detection motor rotor position also must promote, could satisfy demands of applications.And this type motors such as switched reluctance machines, permagnetic synchronous motor; All be to adopt the topmost control foundation of position signalling as control strategy; The position that all needs the high Precision Detection rotor; Therefore the accuracy of position signalling, response speed require very highly, and the temperature relevant with accuracy, strong electromagnetic influence the main accurately factor of motor position detection just.
The position transducer that adopts at present all is installed on the motor body, adopts hall position sensor or optocoupler to be used for the motor position detecting sensor more.Wherein hall position sensor adopts hall principle, carry out the position of induction electromotor rotor, but motor self is exactly the forceful electric power magnetic environment; Transducer is introduced electromagnetic interference easily; Limited the topology layout of hall position sensor on motor, and heat-resisting ability is poor, and motor radiating is had relatively high expectations.Utilize optocoupler as position-detection sensor, though improved the signal anti-electromagnetic interference capability, owing to the optocoupler working temperature is limited in below 100 degree, non-refractory, the application scenario limitation is big.
Summary of the invention
For fear of the weak point of prior art, the present invention proposes a kind of device that detects motor rotor position, improves position probing response speed and the precision of measuring rotor, adapts to forceful electric power magnetic and hot environment, improves the reliability that detects.
A kind of device that detects motor rotor position comprises sensing transmission part and receiving and transmitting unit, it is characterized in that: described sensing transmission part comprises reflective code-disc 4 and armouring double joint optical fiber; On rotor 5, with rotor coaxial reflective code-disc 4 is installed, with the fixing armouring double joint optical fiber of screw thread, armouring double joint optical fiber 1 connects optical transmitting set 8 on electric machine casing 3, and armouring double joint optical fiber 2 connects optical receivers 7; Optical receiver exports electrical signal converted to testing circuit; Described reflective code-disc is the steel fluted disc, and the salient pole number is identical with the rotor number of poles, and the width of male and fomale(M&F) and rotor male and fomale(M&F) width are the identical radian measure number.
Described optical transmitting set adopts high strength light-emitting diode or laser diode.
Described optical receiving set adopts photodiode or phototriode.
Diverse location is with the fixing a plurality of armouring double joint optical fiber of screw thread on housing 3, and a plurality of armouring double joint optical fiber all connect receiving and transmitting unit separately.
A kind of device that detects motor rotor position that the present invention proposes; Because optical fiber can anti-higher temperature; Through this device with non-refractory and the photoelectric device that is subject to electromagnetic interference and electronic component and motor body isolation; Reached light current and separated with forceful electric power, also motor and the location solution demodulation circuit with easy heating up carries out environment separation, makes the demodulation part, position break away from the hot environment of motor.Owing to detect with light, so this device response speed is very fast, can follow the tracks of from the slow-speed of revolution to high-revolving rotor-position scope, simultaneously from electromechanical transducer (optical fiber) use that can extend that goes between, the structural design of convenient supporting controller.
Adopt and this device overcome fully motor strong electromagnetic that high-power electronic device causes and with the complex electromagnetic environment drawback; For realizing that the control of motor complicated algorithm provides a good locations signal; Guaranteed signal integrity, thereby improved the Electro Magnetic Compatibility of the control product supporting widely with it.
The present invention can be applied to switched reluctance machines, permagnetic synchronous motor, stepping motor etc., adopts the motor of this device, can extensively be suitable in the high-temperature work environment, like motor electric equipments such as oil exploration, colliery digging, boats and ships.
Description of drawings
Fig. 1: the sketch map of apparatus of the present invention
Fig. 2: reflective code-disc structural representation in apparatus of the present invention
The reception optical fiber of 1-armouring double joint optical fiber; The mirror based fiber optica of 2-armouring double joint optical fiber; The 3-electric machine casing; The reflective code-disc of 4-; The 5-rotor; The 6-receiving and transmitting unit; The 7-receiver; The 8-reflector; 9-polishes minute surface; The 10-matsurface; The input of the A-signal of telecommunication; The output of the B-signal of telecommunication.
Embodiment
Combine accompanying drawing that the present invention is further described at present:
Fig. 1 is an armored fiber optic position-measurement device sketch map, on rotor, with rotor coaxial reflective code-disc is installed, and reflective code-disc is the steel fluted disc coaxial with rotor, and the reflection code-disc is installed necessary and rotor coaxial, and corresponding salient pole position is identical simultaneously.Wherein the salient pole number of its code-disc is identical with the rotor number of poles, and the corresponding width size of the male and fomale(M&F) of code-disc is the identical radian measure number with rotor male and fomale(M&F) width size simultaneously, and wherein convex surface adopts polishing minute surface mode, improves luminous reflectanc; Concave surface adopts slightly makes face or diffuse surface, reduces luminous reflectanc.Motor with 12/8 structure is an example, and rotating disk is 8 teeth groove structures, wide 22.5 degree that are of teeth groove.Present embodiment is that 3 armouring double joint optical fiber are installed on electric machine casing 3,120 degree of being separated by between them.Behind the follow-up signal modulate circuit, can export three square-wave signals that differ 15 degree.
The present invention is mainly used in the position probing of rotor, adopts reflective code-disc and armored fiber optic combination carrying out measuring position.And on housing, adopt screw thread armored fiber optic mounting means, with the fixing armored fiber optic of screw thread, prevent that motor oscillating from causing optical fiber to swing and the sampling location signal jitter that causes.For improving the precision of position probing, install 3 armored fiber optics in the present embodiment additional.
Operation principle is: two optical fiber; One is used for transmitting the emission light wave, and another root is used for accepting light wave, uses armouring two optical fiber are fixed; And armouring is installed on the electric machine casing part; Form reflective code-disc with employing mirror surface and diffuse surface on the rotor, send light signal, accept the optical fiber receiving optical signals through mirror based fiber optica; Receiving device demodulates the signal of telecommunication according to responsive light signal strength difference, and signal of telecommunication pulsewidth size is proportional with the convex-concave width of motor code-disc, can obtain rotor-position signal.Reflector adopts high strength light-emitting diode or laser diode, and recipient adopts photodiode or phototriode.Measure rotor-position signal, can use one or more position sensing devices.
Device with such detection motor rotor position has improved certainty of measurement and response speed, has reduced the quality and the linear velocity of motor end, the rotor good integrity, and structural strength is good; Because optical fiber can anti-higher temperature; Through this device with non-refractory and the photoelectric device that is subject to electromagnetic interference and electronic devices and components and motor body isolation; Having reached light current separates with forceful electric power; Also motor and the location solution demodulation circuit with easy heating up carries out environment separation, makes the demodulation part, position break away from the hot environment of motor.
Claims (4)
1. a device that detects motor rotor position comprises sensing transmission part and receiving and transmitting unit, it is characterized in that:
Described sensing transmission part comprises reflective code-disc (4) and armouring double joint optical fiber; Go up with rotor coaxial at rotor (5) reflective code-disc (4) is installed, go up with the fixing armouring double joint optical fiber of screw thread, one (2) connection optical transmitting set (8) in the armouring double joint optical fiber, another root (1) connection optical receiver (7) in the armouring double joint optical fiber at electric machine casing (3); Optical receiver exports electrical signal converted to testing circuit; Described reflective code-disc is the steel fluted disc, and the salient pole number is identical with the rotor number of poles, and the width of male and fomale(M&F) and rotor male and fomale(M&F) width are the identical radian measure number.
2. the device of detection motor rotor position according to claim 1 is characterized in that: described optical transmitting set adopts high strength light-emitting diode or laser diode.
3. the device of detection motor rotor position according to claim 1 is characterized in that: described optical receiving set adopts photodiode or phototriode.
4. the device of detection motor rotor position according to claim 1 is characterized in that: go up diverse location with the fixing a plurality of armouring double joint optical fiber of screw thread at housing (3), a plurality of armouring double joint optical fiber all connect separately optical transmitting set and optical receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010164785A CN101860301B (en) | 2010-05-06 | 2010-05-06 | Device for detecting position of electric machine rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010164785A CN101860301B (en) | 2010-05-06 | 2010-05-06 | Device for detecting position of electric machine rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101860301A CN101860301A (en) | 2010-10-13 |
| CN101860301B true CN101860301B (en) | 2012-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010164785A Expired - Fee Related CN101860301B (en) | 2010-05-06 | 2010-05-06 | Device for detecting position of electric machine rotor |
Country Status (1)
| Country | Link |
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| CN (1) | CN101860301B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759747B (en) * | 2013-12-27 | 2016-06-15 | 中国科学院沈阳自动化研究所 | Motor absolute position detection device and method based on uni-core bidirectional technology |
| CN104121937B (en) * | 2014-08-14 | 2016-10-26 | 吕宏强 | The rotary encoder of full light formula fiber-optic transfer |
| CN105973278A (en) * | 2016-06-08 | 2016-09-28 | 北京轩宇智能科技有限公司 | Servo motor and irradiation-resistant photoelectric encoder |
| CN109769407B (en) * | 2016-08-16 | 2022-04-15 | 罗伯特·博世有限公司 | Optical sensor and method for estimating rotor position in electric motor, and electric motor including optical sensor |
| CN107240987A (en) * | 2017-06-21 | 2017-10-10 | 荆楚理工学院 | A kind of permanent-magnet synchronous motor rotor pole-position detector |
| CN107276463A (en) * | 2017-08-09 | 2017-10-20 | 中国科学院宁波材料技术与工程研究所 | A kind of detecting apparatus for rotor position of four phase switch reluctances motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4472664A (en) * | 1982-11-22 | 1984-09-18 | Chung Yeong C | Cross-linked switching circuit for producing a two-phase current drive for a bipolar brushless motor and a brushless motor including said switching circuit |
| EP0285053A2 (en) * | 1987-03-30 | 1988-10-05 | Kollmorgen Corporation | Fiber optic sensing system and method across working air gap of an electric motor |
| CN1080050A (en) * | 1992-05-06 | 1993-12-29 | 三星电子株式会社 | The rotor of motor having no brush position detecting device |
| CN201656886U (en) * | 2010-05-06 | 2010-11-24 | 陕西航空电气有限责任公司 | Device for detecting position of motor rotor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6227704A (en) * | 1985-07-27 | 1987-02-05 | Sumitomo Electric Ind Ltd | Water pressure resisting light penetration part |
-
2010
- 2010-05-06 CN CN201010164785A patent/CN101860301B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4472664A (en) * | 1982-11-22 | 1984-09-18 | Chung Yeong C | Cross-linked switching circuit for producing a two-phase current drive for a bipolar brushless motor and a brushless motor including said switching circuit |
| EP0285053A2 (en) * | 1987-03-30 | 1988-10-05 | Kollmorgen Corporation | Fiber optic sensing system and method across working air gap of an electric motor |
| CN1080050A (en) * | 1992-05-06 | 1993-12-29 | 三星电子株式会社 | The rotor of motor having no brush position detecting device |
| CN201656886U (en) * | 2010-05-06 | 2010-11-24 | 陕西航空电气有限责任公司 | Device for detecting position of motor rotor |
Non-Patent Citations (1)
| Title |
|---|
| JP昭62-27704A 1987.02.05 |
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| CN101860301A (en) | 2010-10-13 |
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Granted publication date: 20121024 Termination date: 20170506 |