CN109343506A - A kind of magnetically suspended bearing detection method, system and application - Google Patents
A kind of magnetically suspended bearing detection method, system and application Download PDFInfo
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- CN109343506A CN109343506A CN201811196421.0A CN201811196421A CN109343506A CN 109343506 A CN109343506 A CN 109343506A CN 201811196421 A CN201811196421 A CN 201811196421A CN 109343506 A CN109343506 A CN 109343506A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a kind of magnetically suspended bearing detection method, system and applications, belong to magnetic levitation technology field.Whether the present invention is abnormal for detecting magnetically suspended bearing, comprising: communication check: when communicate successfully, carry out current detecting or displacement detecting, when communication failure, and judgement magnetically suspended bearing exception；Current detecting: when magnetic suspension bearing control electric current is normal, carrying out communication check or displacement detecting, when magnetic suspension bearing controls current anomaly, determines that magnetically suspended bearing is abnormal；Displacement detecting: when magnetic suspension bearing displacement is normal, communication check or current detecting are carried out, when magnetic suspension bearing displacement is abnormal, determines that magnetically suspended bearing is abnormal；When determining magnetically suspended bearing exception, magnetically suspended bearing detection terminates.Whether displacement, electric current and the communication function that the present invention can accurately detect magnetically suspended bearing are normal, improve the safety and reliability of magnetically suspended bearing.
Description
Technical field
The invention belongs to magnetic levitation technology fields, and in particular to a kind of magnetically suspended bearing detection method, system and
Using.
Background technique
Magnetic suspension bearing is applied in magnetic suspension centrifugal chiller, and magnetic suspension centrifugal chiller includes magnetic suspension compressor, evaporation
Device, frequency converter and magnetic suspension centrifuge master control set.The magnetically suspended bearing of control magnetic suspension bearing includes outer ring displacement
Control and inner ring current control.Outer ring passes through the variation of detection displacement signal, by the control action of adjuster and electric current, in electricity
Bearing control electric current is generated in magnet coil, to generate Electromagnetic Control power to realize the stable suspersion of shaft.Therefore displacement letter
Number, current signal be magnetically suspended bearing decisive variable.
With the raising of magnetic suspension centrifugal chiller running frequency, current signal is possible to the case where being distorted, i.e., actually
Output electric current is unable to satisfy the needs of control.So needing to calculate magnetic suspension shaft previously according to magnetic suspension centrifugal chiller frequency
Maximum output current is held, to carry out closed loop current classification judgement (increasing to maximum current step by step).When current closed-loop is without exception
When, it just can guarantee the stability of magnetic levitation bearing system.
In given magnetic suspension bearing electric stream changing value, the displacement signal of magnetic suspension bearing can also follow variation, also
It is to say, whether magnetic suspension bearing electric current can reflect magnetic suspension bearing displacement to a certain extent normal.If guaranteed complete
Displacement in range is preparatory (being displaced actually active voltage range is 0-3V), it is still desirable to execute magnetic suspension bearing displacement inspection
It surveys.
In addition, magnetically suspended bearing needs and the frequency converter in magnetic suspension centrifugal chiller, magnetic suspension centrifuge master control
Device carries out data interaction, so communication is also the essential a part of magnetically suspended bearing.Particularly, in magnetic suspension
In centrifugal chiller operational process, when magnetic suspension bearing appearance exception needs to shut down, need to send halt instruction, magnetcisuspension to frequency converter
Floating bearing controller and frequency converter pass through specified communication protocol progress data interaction, such as communication failure, it would be possible to cause serious
Bearing collision.
Therefore, the communication function of magnetic suspension bearing displacement exception, the exception of electric current or magnetic suspension controller is abnormal, can all lead
Cause the exception of magnetic suspension controller.
Application No. is 201510830628.9 Chinese patent applications to disclose detection method, the device of a kind of axial displacement
And system.Wherein, this method comprises: obtaining the axial direction that each shaft position sensor detects in multiple shaft position sensors
Displacement, wherein the detection direction of each shaft position sensor is parallel to the rotor axis of rotary part, and multiple axial displacements pass
Sensor is respectively positioned on the same side of detection faces, and is uniformly arranged along the circumferential direction of rotary part；According to the multiple axial displacements got
Determine the target axial displacement of rotary part.
Application No. is 201010227986.8 Chinese patent applications to disclose a kind of magnetic suspension control system, and feature exists
In, including electric current driving and detection module, position detection and signal processing module, digital signal processing module and man-machine friendship
Mutual module；The electric current driving and detection module, on the one hand for allowing it to generate suspension according to a control signal drive electromagnet
It is suspended the electromagnetic force of control object, on the other hand for detecting the size of current of electromagnet, and current signal is converted to the
One voltage signal；The position detection and signal processing module, for detecting the levitation position for being suspended control object, and outstanding
The position signal that trim is set is converted to second voltage signal；The digital signal processing module drives and examines with the electric current respectively
It surveys module to connect with position detection and signal processing module, on the one hand be used for the first voltage signal and second voltage signal
It carries out sampling and is converted to digital signal, and the digital signal is generated into internal control signal output by the processing of control algolithm
To electric current driving and detection module, it is on the other hand used for real-time calling various control algorithm, adjusts control parameter, realization pair
It is suspended the real-time suspension control of control object；The human-computer interaction module is connect with the digital signal processing module, is used for
It receives the external control signal of user's input and exports to the digital signal processing module, and for passing through real-time control circle
Face display control state.
Above technical scheme the problem is that, only on one influence magnetically suspended bearing a factor detect,
And comprehensive detection is not can be carried out.If abnormal magnetic suspension controller is applied to magnetic suspension centrifugal water chillers, it will cause
Serious consequence.
Summary of the invention
It is an object of the present invention to provide a kind of magnetically suspended bearing detection method, system and applications, can accurately examine
Whether displacement, electric current and the communication function for surveying magnetically suspended bearing are normal.
Specifically, the present invention adopts the following technical solutions realize.
On the one hand, the present invention provides a kind of magnetically suspended bearing detection method, for detecting magnetic suspension bearing control
Whether device is abnormal, comprising:
Communication check: whether detection magnetically suspended bearing succeeds with communication between devices where magnetic suspension bearing, communicates
When success, current detecting or displacement detecting are carried out, when communication failure, determine that magnetically suspended bearing is abnormal；
Current detecting: whether detection magnetic suspension bearing control electric current is normal, when magnetic suspension bearing control electric current is normal, carries out
Communication check or displacement detecting when magnetic suspension bearing controls current anomaly, determine that magnetically suspended bearing is abnormal；
Displacement detecting: whether detection magnetic suspension bearing displacement is normal, when magnetic suspension bearing displacement is normal, carries out communication check
Or current detecting, when magnetic suspension bearing displacement is abnormal, determine that magnetically suspended bearing is abnormal；
When determining magnetically suspended bearing exception, magnetically suspended bearing detection terminates.
Furthermore, the communication check includes communication mode and magnetic of the magnetically suspended bearing respectively to be supported
Equipment where suspension bearing is communicated, and any communication mode is deposited when abnormal, determines magnetically suspended bearing and magnetcisuspension
Communication between devices failure where floating axle is held.
Furthermore, the current detecting includes:
Open-loop current detection-phase: sampling magnetic suspension bearing open-loop current, judges gained open-loop current sampled value
Whether in given open-loop current threshold range, if determining that open-loop current detection is normal, into electric current in threshold range
Closed loop detection-phase, otherwise, it is determined that magnetically suspended bearing is abnormal；
Current closed-loop detection-phase: sampling magnetic suspension bearing closed loop current, judges gained closed loop current sampled value
Whether in given closed loop current threshold range, if the detection of Cutoff current closed loop is normal, magnetic suspension shaft in threshold range
It is normal to hold control electric current, otherwise, it is determined that magnetically suspended bearing is abnormal.
Furthermore, the current closed-loop detection-phase includes several sampling deterministic processes successively carried out, Ren Yici
The result of sampling deterministic process be it is no, then determine that magnetically suspended bearing is abnormal；The sampling deterministic process includes: given closes
Circular current threshold range, samples closed loop current, and relatively whether gained closed loop current sampled value is in given closed loop current
In threshold range, if the closed loop current sampled value not in given closed loop current threshold range, determines that this time sampling is sentenced
It is no that disconnected process, which obtains result,.
Furthermore, when the sampling deterministic process starts, divide periodically corresponding with the sampling deterministic process is opened
Device, it is described divide timer interruption when, whether the closed loop current sampled value in given closed loop current threshold range.
Furthermore, when first sampling deterministic process starts, master timer, the master timer are also opened
Timing be greater than whole described in divide the sum of timing of timer, if all sampling deterministic process results be not it is no,
When then waiting total timer interruption, determine that closed loop detection electric current is normal.
Furthermore, the displacement detecting includes:
Set the reference displacement threshold value in several directions on magnetic suspension bearing；
The displacement in several directions on the magnetic suspension bearing is sampled, the displacement sampled value in several directions is obtained；
Compare the displacement sampled value and unidirectional described with reference to displacement threshold value, the former whether in latter range,
If any comparison result be it is no, determine that magnetic suspension bearing displacement is abnormal, if the directive comparison result of institute is to be, determine
Magnetic suspension bearing displacement is normal.
Another aspect, the present invention provide a kind of magnetically suspended bearing detection system, using above-mentioned magnetic suspension bearing control
Device detection method processed detects magnetically suspended bearing, the magnetically suspended bearing detection system, comprising:
Control module, control and result judgement for the communication check, current detecting and/or displacement detecting；
Communication module, for communication between devices and communication check where magnetically suspended bearing and magnetic suspension bearing；
Parameter setting module, for the given open-loop current threshold range, given closed loop current threshold value model to be arranged
It encloses；
Detection module, for sampling open-loop current, on closed loop current and the magnetic suspension bearing several directions displacement；
Comparison module, for the open-loop current sampled value and given open-loop current threshold range, relatively described in
Closed loop current sampled value and given closed loop current threshold range, and/or the displacement sampled value and unidirectional institute
It states with reference to displacement threshold value；
Display module, for showing the result of closed loop current detection, open-loop current detection and/or displacement detecting.
It furthermore, further include timer module, for timer needed for providing current detecting.
In another aspect, the present invention also provides a kind of magnetic suspension centrifugal chiller, including magnetically suspended bearing, the magnetcisuspension
Floating bearing controller is detected using above-mentioned magnetically suspended bearing detection method.
Beneficial effects of the present invention are as follows: magnetically suspended bearing detection system of the invention and method, by magnetic
Whether the displacement of suspension bearing controller, the detection of electric current and communication function, can may be used with accurate judgement magnetically suspended bearing
To work normally, prevents abnormal magnetically suspended bearing to be applied to magnetic suspension centrifugal water chillers, improve magnetic suspension shaft
Hold the safety and reliability of controller.
Detailed description of the invention
Fig. 1 is the magnetic suspension bearing displacement detecting middle (center) bearing position view of the embodiment of the present invention.
Fig. 2 is the magnetic suspension bearing right view of the embodiment of the present invention.
Fig. 3 is the AA sectional view in Fig. 2.
Fig. 4 is the magnetically suspended bearing detection system configuration diagram of the embodiment of the present invention.
Fig. 5 is the magnetically suspended bearing detection method flow chart of the embodiment of the present invention.
Label in figure: 1- fore bearing, 2- rear bearing, 3- axis, 4- thrust disc, 5- first axis bearing, 6- second are axial
Bearing.
Specific embodiment
Below with reference to embodiment and referring to attached drawing, present invention is further described in detail.
Embodiment 1:
One embodiment of the present of invention is a kind of magnetically suspended bearing detection system.The structure of magnetic suspension bearing is joined
See FIG. 1 to FIG. 3.It include fore bearing 1, rear bearing 2 and thrust disc 4 on magnetic suspension shaft 3.Thrust disc 4 is set to first axis bearing 5
And second between axial bearing 6, it is vertical with magnetic suspension shaft 3.Respectively to the direction x, y on fore bearing 1 and rear bearing 2, along the axis of axis 3
To the direction z, totally 5 directions control magnetic suspension bearing.
Magnetically suspended bearing detection system is by communication module, parameter setting module, detection module, comparison module, fixed
When device module, display module, control module (for judging testing result, being controlled by main control chip), as shown in Figure 4.
Magnetically suspended bearing detection method flow chart is as shown in figure 5, by leading to magnetic suspension bearing control system
Letter, electric current and displacement system are detected, and can effectively judge whether bearing control system is abnormal, improve magnetic suspension bearing control system
The safety and reliability of system.
Magnetically suspended bearing supports three kinds of communication modes and extraneous (such as host computer or other controls in the present embodiment
Device processed) carry out data interaction.Other controllers can be another set of magnetically suspended bearing or have and this magnetic suspension
The controller of bearing controller communication function.
When communication check, magnetically suspended bearing is by communication module respectively with the communication mode supported and extraneous progress
Communication, any communication mode are deposited when abnormal, then control module sends result to display module, display module display communication
Failure determines the failure of magnetically suspended bearing communication with the outside world.Bearing control system exception, no longer progress electric current are determined at this time
Detection and displacement detecting.Only all pass through there are three types of communication mode, just determines that communication check is normal, carry out current detecting.It can also be with
Before current detecting, advanced row displacement detecting.Communication check is not limited to the present embodiment the detection of three kinds of communication modes, answers
Detecting all communication modes that magnetically suspended bearing is supported whether there is exception.
Current detecting is divided into open-loop current detection and detects with closed loop current, and the present embodiment is detected as first with open-loop current and holds
Row order section, closed loop current were detected as the second execution stage.
Open-loop current detection-phase includes: that open-loop current is set in parameter setting module as Io, it is set as bearing control
Bias current, setting electric current threshold value Δ i, Δ i can be 0.1,0.2,0.3 etc..Pass through detection module divided ring feedback current
It is sampled, current sampling data is denoted as i.By comparison module to current sampling data i and current threshold Io± Δ i is compared, if i
Not in this threshold range, display module prompts open-loop current detection failure, therefore, it is determined that bearing controller open-loop current is abnormal.
In the present embodiment, double sampling deterministic process is carried out to the detection of closed loop current.It is arranged three by timer module
The timing of timer, timer T1, timer T2 and timer T3, timer T3 is greater than timer T1's and timer T2
The sum of timing.Start to start timer T1 and timer T3 while closed loop current detection-phase.During timer T1 occurs
When disconnected, closed loop current I is given in parameter setting module1Opening timing device 2 simultaneously.By detection module to closed loop feedback electric current
It is sampled, is denoted as i.By comparison module to 1 threshold value I of current sampling data i and closed loop currentc1± Δ i is compared, if i does not exist
When this threshold range, 1 failure of closed loop detection, display module prompts the detection failure of closed loop current 1, determines that bearing control system is different
Often.If i is within the scope of current threshold, when timer T2 is interrupted, closed loop current I is given in parameter setting module2Into
Row closed loop detection 2, samples closed loop feedback electric current by detection module, is denoted as i.By comparison module to current sampling data i
With 2 threshold value I of closed loop currentc2± Δ i is compared.If i, not in this threshold range, 2 failure of closed loop detection determines bearing control
System exception；If i is in threshold range, when waiting timer T3 is interrupted, display module prompts current detecting success, determines
Closed loop current detection is normal.It is readily apparent that, current closed-loop detection is not limited to the present embodiment the sampling of two closed loop currents
Deterministic process.Current closed-loop detection can be divided into multiple sampling deterministic processes, and for example, n is a.N+1 need to then be arranged accordingly to determine
When device T1, T2, T3 ... and T (n+1), wherein timer T (n+1) timing needs to meet:
T(n+1)>T(n)+T(n-1)+T(n-2)+…+T1
When displacement detecting, magnetic suspension bearing is controlled because sharing 5 directions, then shares 5 directions accordingly
Displacement signal needs to detect.The reference displacement that each direction is set in parameter setting module is p, and displacement threshold value is p ± Δ
p.It is sampled by displacement signal of the detection module to each direction, is denoted as P.The displacement in each direction is sampled by comparison module
Value p and displacement threshold value p ± Δ p are compared, if the displacement sampled value in any one of 5 directions direction is in threshold range
Outside, display module prompt bearing displacement detecting failure, determines bearing control system exception；The displacement in only 5 directions is in threshold
It is worth within range, displacement detecting just passes through.Displacement detecting is not limited to the present embodiment the displacement detecting in 5 directions, can be with
The direction controlled magnetic suspension bearing is refined, for example is detected every certain angle, then should be detected to magnetic suspension bearing
All sides controlled shift up with the presence or absence of abnormal.
The sequence of above-mentioned communication check, current detecting and displacement detecting can be in any combination.
Although the present invention has been described by way of example and in terms of the preferred embodiments, embodiment is not for the purpose of limiting the invention.Not
It is detached from the spirit and scope of the present invention, any equivalent change or retouch done also belongs to the protection scope of the present invention.Cause
This protection scope of the present invention should be based on the content defined in the claims of this application.
Claims (10)
1. a kind of magnetically suspended bearing detection method, whether abnormal for detecting magnetically suspended bearing, feature exists
In, comprising:
Communication check: whether detection magnetically suspended bearing succeeds with communication between devices where magnetic suspension bearing, communicates successfully
When, it carries out current detecting or displacement detecting, when communication failure, determines that magnetically suspended bearing is abnormal；
Current detecting: whether detection magnetic suspension bearing control electric current is normal, when magnetic suspension bearing control electric current is normal, is communicated
Detection or displacement detecting when magnetic suspension bearing controls current anomaly, determine that magnetically suspended bearing is abnormal；
Displacement detecting: whether detection magnetic suspension bearing displacement is normal, when magnetic suspension bearing displacement is normal, carries out communication check or electricity
Stream detection when magnetic suspension bearing displacement is abnormal, determines that magnetically suspended bearing is abnormal；
When determining magnetically suspended bearing exception, magnetically suspended bearing detection terminates.
2. magnetically suspended bearing detection method as described in claim 1, which is characterized in that the communication check includes magnetic
Suspension bearing controller is communicated with the communication mode supported with equipment where magnetic suspension bearing respectively, any communication party
Formula is deposited when abnormal, and communication between devices fail where determining magnetically suspended bearing and magnetic suspension bearing.
3. magnetically suspended bearing detection method as described in claim 1, which is characterized in that the current detecting includes:
Open-loop current detection-phase: sampling magnetic suspension bearing open-loop current, judge gained open-loop current sampled value whether to
In fixed open-loop current threshold range, if determining that open-loop current detection is normal in threshold range, being detected into current closed-loop
Stage, otherwise, it is determined that magnetically suspended bearing is abnormal；
Current closed-loop detection-phase: sampling magnetic suspension bearing closed loop current, whether judges gained closed loop current sampled value
In given closed loop current threshold range, if the detection of Cutoff current closed loop is normal, magnetic suspension bearing control in threshold range
Electric current processed is normal, otherwise, it is determined that magnetically suspended bearing is abnormal.
4. magnetically suspended bearing detection method as claimed in claim 3, which is characterized in that the current closed-loop detects rank
Section includes several sampling deterministic processes successively carried out, the result of any time sampling deterministic process be it is no, then determine magnetic suspension shaft
Hold controller exception；The sampling deterministic process includes: given closed loop current threshold range, is sampled to closed loop current, than
Compared with gained closed loop current sampled value whether in given closed loop current threshold range, if the closed loop current sampled value is not being given
In fixed closed loop current threshold range, then it is no for determining that this time sampling deterministic process obtains result.
5. magnetically suspended bearing detection method as claimed in claim 4, which is characterized in that the sampling deterministic process is opened
When the beginning, open it is corresponding with the sampling deterministic process divides timer, it is described divide timer interruption when, the closed loop is electric
Sampled value is flowed whether in given closed loop current threshold range.
6. magnetically suspended bearing detection method as claimed in claim 5, which is characterized in that sentence in first sampling
When disconnected process starts, also unlatching master timer, the timing of the master timer are greater than the timing for dividing timer described in whole
The sum of time, if all sampling deterministic process results be not it is no, when waiting total timer interruption, determine closed loop detection
Electric current is normal.
7. magnetically suspended bearing detection method as described in claim 1, which is characterized in that the displacement detecting includes:
Set the reference displacement threshold value in several directions on magnetic suspension bearing；
The displacement in several directions on the magnetic suspension bearing is sampled, the displacement sampled value in several directions is obtained；
Compare the displacement sampled value and unidirectional described with reference to displacement threshold value, the former is whether in latter range, if appointing
One comparison result be it is no, then determine that magnetic suspension bearing displacement is abnormal, if the directive comparison result of institute is to be, determine magnetcisuspension
It is normal that floating axle holds displacement.
8. a kind of magnetically suspended bearing detection system, which is characterized in that using the magnetcisuspension as described in Claims 1 to 5 or 8
Floating bearing controller detection method detects magnetically suspended bearing, the magnetically suspended bearing detection system,
Include:
Control module, control and result judgement for the communication check, current detecting and/or displacement detecting；
Communication module, for communication between devices and communication check where magnetically suspended bearing and magnetic suspension bearing；
Parameter setting module, for the given open-loop current threshold range, given closed loop current threshold range to be arranged；
Detection module, for sampling open-loop current, on closed loop current and the magnetic suspension bearing several directions displacement；
Comparison module, for the open-loop current sampled value and given open-loop current threshold range, the closed loop
Current sampling data and given closed loop current threshold range, and/or the displacement sampled value and the unidirectional ginseng
Examine displacement threshold value；
Display module, for showing the result of closed loop current detection, open-loop current detection and/or displacement detecting.
9. magnetically suspended bearing detection system as claimed in claim 8, which is characterized in that it further include timer module,
For timer needed for providing current detecting.
10. a kind of magnetic suspension centrifugal chiller, including magnetically suspended bearing, which is characterized in that the magnetic suspension bearing control
Device using power ask 1 benefit want any one of~7 described in magnetically suspended bearing detection method detection.
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| CN201811196421.0A CN109343506B (en) | 2018-10-15 | 2018-10-15 | Magnetic suspension bearing controller detection method, system and application |
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| CN201811196421.0A CN109343506B (en) | 2018-10-15 | 2018-10-15 | Magnetic suspension bearing controller detection method, system and application |
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| CN114114906A (en) * | 2021-11-01 | 2022-03-01 | 珠海格力电器股份有限公司 | Magnetic bearing system and control method and device thereof, storage medium and processor |
| CN114635919A (en) * | 2022-03-08 | 2022-06-17 | 珠海格力电器股份有限公司 | Magnetic suspension bearing system, control method and device thereof and storage medium |
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| CN109343506B (en) | 2020-10-02 |
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