CN102358206A - Interpole-coil-based air-gap-free sensor electromagnetic attraction suspension control method - Google Patents
Interpole-coil-based air-gap-free sensor electromagnetic attraction suspension control method Download PDFInfo
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- CN102358206A CN102358206A CN201110210027XA CN201110210027A CN102358206A CN 102358206 A CN102358206 A CN 102358206A CN 201110210027X A CN201110210027X A CN 201110210027XA CN 201110210027 A CN201110210027 A CN 201110210027A CN 102358206 A CN102358206 A CN 102358206A
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Abstract
The invention discloses an interpole-coil-based air-gap-free sensor electromagnetic attraction suspension control method. In the method, an interpole coil is added on a suspension coil; voltage with a certain feature is applied to the interpole coil; inductance of the interpole coil is identified according to input voltage and output current of the interpole coil; a suspension air gap value is acquired according to the inductance of the interpole coil; and closed loop control is realized by using the air gap value. The method is applicable to electromagnetic attraction suspension control; as an air gap sensor is avoided, a system is simplified greatly, a precision requirement on a system track of a maglev train is reduced, instability of control over the system caused by inaccurate measurement of the sensor can be avoided, and problems that the maglev train passes through a track gap and the like can be solved; furthermore, the method has the advantages of high dependability, low cost, safety, reliability and the like.
Description
Technical field
The present invention relates to a kind of method of not having the electromagnetic attraction Suspension Control of air gap sensor, relate in particular to a kind of Suspension Control and System Discrimination that is used for the floating car of magnetic.
Background technology
The electromagnetic attraction suspension system is unsettled system, needs the air gap controlled reset to realize system stability usually.Concerning electromagnetic attraction suspended, because electromagnetic force becomes to be similar to the inverse square relation with the air gap value, when electromagnet current was constant, the little electromagnetic force of air gap increased, and can further reduce air gap, and the big electromagnetic force of air gap reduces, and can further increase air gap, so system can not stablize.Realize the stable suspersion of object if desired, just need regulate electromagnet current, such as when air gap diminishes, reduce electromagnet current, make electromagnetic force reduce, object can fall to original position; When air gap becomes big, increase electromagnet current, make electromagnetic force increase, object can rise to original position.Obviously, need feed back control current to the air gap value, theoretical analysis shows that system stability also need adopt the micro component of air gap value to feed back if desired.So present electromagnetic attraction suspension control system all adopts air gap sensor air gap value and carries out the control of electromagnet current through this air gap value.
The shortcoming of this method is the safe and reliable and stable detected value that depends on the air gap sensor to a great extent of system.Concerning magnetic-levitation train, the air gap sensor is contained on the levitating electromagnet usually, reflects the distance (being levitation gap) of electromagnet and track suspended face through the distance between detection faces on the air gap sensor track.This just means the setting accuracy that will guarantee the air gap sensor, the accuracy of detection of sensor and the working accuracy of stability and air gap sensor face and suspension face; Just to the requirement of track than higher, need the suspension face that guarantees and detection faces precision and both relative accuracys separately.
Summary of the invention
In view of the above deficiency of prior art, the inductance of the interpole coil that the objective of the invention is together to twine through identification and suspended coil obtains the suspension air gap value that is used to control, and need not use the air gap sensor.
The objective of the invention is to realize through following method.
A kind of no air gap sensor electrical magnetic attraction suspension control method based on interpole coil is used to control the gas length between electromagnet and suspended matter; In electromagnetic attraction suspension control system by electromagnet, track, interpole coil, air gap identification unit and Suspension Control unit structure; Through following method gas length is carried out closed loop control: add the voltage with certain characteristic, monitoring current on interpole coil to the interpole coil that is intertwined with the aerosoles magnet coil; Voltage and current signal through interpole coil carries out identification to the interpole coil inductance; Record the air gap value of system again according to the one-to-one relationship between obtaining system inductance and suspension air gap; And then system being carried out closed loop control according to the air gap value, regulating magnet current setting electromagnetic force makes near suspended matter stable suspersion selected gas length.
Adopt method of the present invention, avoided dependence the air gap sensor that adopts multiple external error such as introducing aforementioned track, equipment installation and manufacturing errors more easily.See from electro-magnetism; Interpole coil on the electromagnet and track constitute inductance, resistance system; Wherein resistance is relevant with coil itself and temperature etc., and coil inductance mainly depends on distance with electromagnet material, coil turn etc. self parameter and electromagnet and track etc.Interpole coil and suspended coil are intertwined, so the distance of the distance of interpole coil and track and suspended coil and track is identical.After electromagnet and track are confirmed; The inductance value of interpole coil depends primarily on distance between the two, and the nearlyer inductance value of distance is big more, otherwise; Distance inductance value far away is more little, and the relation between suspension distance and the inductance value is confirmable through theoretical analysis or test.Theoretically, the inductance value and the distance relation of being inversely proportional to that suspends.Both have one-to-one relationship in reality, that is to say that the inductance value through system can obtain the levitation gap value of system.
Suspension system is come, adopt the method for interpole coil, interpole coil and track constitute inductance, resistance system.Add voltage for interpole coil, can real-time identification go out the current inductance of system, resistance through analyzing the interpole coil voltage and current with certain characteristic.The inductance that obtains through real-time identification can obtain the gap width of system, through this identifier system is carried out close-loop feedback control, and control system is stable.Adopt the method for interpole coil, because the relative suspended coil number of turn of interpole coil will be lacked, the disturbance force that interpole coil produces is concerning system, and it is less to compare; Interpole coil separates with suspended coil simultaneously, and interpole coil can not influence Suspension Control.
The inventive method is applicable to common electromagnetic attraction suspension control system; The gap width that obtains through the identification of interpolation interpole coil can reflect the gap width of levitating electromagnet and track really, and does not need the air gap sensor, and the requirement to track in the time of system simplification also reduces greatly; Can inaccurately owing to the measurement of sensor not cause system's control unstable yet; Can cross problems such as rail gap by reasonable solution magnetic-levitation train, advantage such as have the reliability height, cost is low, and is safe and reliable.
Description of drawings
Fig. 1 is the installation and detection graph of a relation of traditional air gap sensor.
Fig. 2 is the electromagnetic attraction suspension control system block diagram of Traditional use air gap sensor.
Fig. 3 is based on the no air gap sensor electrical magnetic attraction suspension control system block diagram of interpole coil.
The specific embodiment
Obviously, the inventive method has the mode of multiple concrete realization under the peripheral condition of prior art.
Fig. 3 has expressed wherein a kind of specific embodiment: the interpole coil of the certain number of turn of coiling on the aerosoles electromagnet; Interpole coil and aerosoles magnet coil are intertwined; To the alternating-current voltage/AC voltage of interpole coil adding certain frequency, on coil, monitor alternating current during operation; According to the voltage and current value, calculate the resistance and the inductance parameters of current electromagnet system in real time through the on-line identification algorithm.According to inductance, search and obtain current air gap value through testing ready-made inductance-air gap synopsis in advance; Use this air gap value carry out closed loop control guarantee suspended matter can be near previously selected gas length stable suspersion.
The present invention can use any electromagnetic attraction suspension system, does not adopt the air gap sensor, and simplified system reduces the requirement to track, also can increase acceleration pick-up, is used to observe air gap differential (speed).
Claims (2)
1. the no air gap sensor electrical magnetic attraction suspension control method based on interpole coil is used to control the gas length between electromagnet and suspended matter; In electromagnetic attraction suspension control system by electromagnet, track, interpole coil, air gap identification unit and Suspension Control unit structure; Through following method gas length is carried out closed loop control: add the voltage with certain characteristic, monitoring current on interpole coil to the interpole coil that is intertwined with the aerosoles magnet coil; Voltage and current signal through interpole coil carries out identification to the interpole coil inductance; Record the air gap value of system again according to the one-to-one relationship between obtaining system inductance and suspension air gap; And then system being carried out closed loop control according to the air gap value, regulating magnet current setting electromagnetic force makes near suspended matter stable suspersion selected gas length.
2. a kind of no air gap sensor electrical magnetic attraction suspension control method based on interpole coil according to claim 1, it is characterized in that: (A) system need not use with the air gap detecting unit; (B) system is through applying interpole coil to electromagnet, and input voltage with certain characteristic and outgoing current through interpole coil carry out the identification of air gap value.
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| CN201110210027XA CN102358206A (en) | 2011-07-26 | 2011-07-26 | Interpole-coil-based air-gap-free sensor electromagnetic attraction suspension control method |
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| CN201110210027XA CN102358206A (en) | 2011-07-26 | 2011-07-26 | Interpole-coil-based air-gap-free sensor electromagnetic attraction suspension control method |
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Cited By (6)
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| CN103728883A (en) * | 2014-01-14 | 2014-04-16 | 渤海大学 | Control method of active control type magnetic suspension system free of position sensor |
| CN106828185A (en) * | 2017-01-19 | 2017-06-13 | 西南交通大学 | A kind of electromagnetic suspension train suspension control method |
| CN107380008A (en) * | 2017-08-29 | 2017-11-24 | 于学禄 | A kind of Auxiliary support guidance method of wheel track vehicle |
| CN109477845A (en) * | 2016-07-21 | 2019-03-15 | 西门子医疗保健诊断公司 | The system and method that automation track is monitored and is safeguarded based on condition |
| CN109855890A (en) * | 2019-01-25 | 2019-06-07 | 西南交通大学 | A kind of Single electromagnet suspension test device |
| WO2023151723A1 (en) * | 2022-07-11 | 2023-08-17 | 西南交通大学 | Gap self-sensing electromagnetic suspension system based on composite coil, and control method therefor |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728883A (en) * | 2014-01-14 | 2014-04-16 | 渤海大学 | Control method of active control type magnetic suspension system free of position sensor |
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| CN109477845A (en) * | 2016-07-21 | 2019-03-15 | 西门子医疗保健诊断公司 | The system and method that automation track is monitored and is safeguarded based on condition |
| US11721433B2 (en) | 2016-07-21 | 2023-08-08 | Siemens Healthcare Diagnostics Inc. | System and method for condition based monitoring and maintenance of an automation track |
| CN106828185A (en) * | 2017-01-19 | 2017-06-13 | 西南交通大学 | A kind of electromagnetic suspension train suspension control method |
| CN107380008A (en) * | 2017-08-29 | 2017-11-24 | 于学禄 | A kind of Auxiliary support guidance method of wheel track vehicle |
| CN109855890A (en) * | 2019-01-25 | 2019-06-07 | 西南交通大学 | A kind of Single electromagnet suspension test device |
| CN109855890B (en) * | 2019-01-25 | 2024-02-06 | 西南交通大学 | Single electromagnet suspension test device |
| WO2023151723A1 (en) * | 2022-07-11 | 2023-08-17 | 西南交通大学 | Gap self-sensing electromagnetic suspension system based on composite coil, and control method therefor |
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Application publication date: 20120222 |