CN111641367A - Magnetic suspension bearing control system based on motor running state and control method thereof - Google Patents
Magnetic suspension bearing control system based on motor running state and control method thereof Download PDFInfo
- Publication number
- CN111641367A CN111641367A CN202010398726.0A CN202010398726A CN111641367A CN 111641367 A CN111641367 A CN 111641367A CN 202010398726 A CN202010398726 A CN 202010398726A CN 111641367 A CN111641367 A CN 111641367A
- Authority
- CN
- China
- Prior art keywords
- motor
- magnetic suspension
- suspension bearing
- current
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims abstract description 19
- 230000003321 amplification Effects 0.000 claims abstract description 9
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 9
- 230000008859 change Effects 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 6
- 230000004907 flux Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 11
- 230000007547 defect Effects 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
Images
Classifications
-
- 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
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0444—Details of devices to control the actuation of the electromagnets
- F16C32/0451—Details of controllers, i.e. the units determining the power to be supplied, e.g. comparing elements, feedback arrangements with P.I.D. control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/0485—Active magnetic bearings for rotary movement with active support of three degrees of freedom
-
- 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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/0004—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
-
- 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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/14—Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention relates to a magnetic suspension bearing control system based on a motor running state and a control method thereof. The system comprises a magnetic suspension bearing controller, a driving module, a magnetic suspension bearing, a motor, current monitoring equipment and a proportional amplification module. The invention judges the position of the rotor of the motor by monitoring the input current of the motor and uses the position as the feedback input mode of the magnetic suspension bearing controller, thereby achieving the magnetic suspension bearing without a position sensor aiming at the motor and achieving the control of the magnetic suspension bearing without the position sensor aiming at the motor. The magnetic bearing overcomes the defects of the traditional magnetic bearing with a position sensor, and solves the problems that the magnetic bearing needs to be provided with a displacement sensor to detect a displacement signal in the prior art, so that the size of the magnetic bearing is increased, and the cost requirement of the magnetic bearing is greatly improved. Meanwhile, the radial force of the motor rotor can be judged, and the reverse electromagnetic force is applied in advance, so that the anti-interference capability and the stability of the magnetic suspension bearing can be greatly improved.
Description
Technical Field
The invention relates to the technical field of motor operation monitoring, in particular to a magnetic suspension bearing control system based on a motor operation state and a control method thereof.
Background
The high-speed rotor of the magnetic suspension motor is supported by the magnetic bearing, has the advantages of high rotating speed, no friction, no need of lubrication and maintenance, long service life, high reliability and the like, and has very wide application prospect in fields of advanced scientific instruments, high-technology industrial process equipment, national defense and the like. However, the current sensorless self-detection magnetic suspension bearing and self-bearing motor are the main trends of domestic and foreign research.
At present, the traditional magnetic bearing system adopts an electromagnetic bearing and is required to be provided with a displacement sensor to detect a displacement signal, so that the size of the magnetic bearing is increased, and the cost requirement on the magnetic bearing is greatly improved. The self-bearing motor has great limitation, and a new bearingless motor needs to be designed for each motor, so that the resource waste is greatly increased, and the limitation is increased.
The magnetic suspension bearing needs to be provided with a displacement sensor to detect a displacement signal, so that the size of the magnetic bearing is increased, and the cost requirement of the magnetic suspension bearing is greatly improved. In recent years, research on magnetic bearings without position sensors has been a hot research spot of magnetic bearings, but has not made a great breakthrough.
A conventional magnetic suspension bearing control method is, as shown in fig. 1, exemplified by a magnetic suspension bearing control system having a motor mounted thereon. The expected position of the motor rotor is set firstly, a deviation value is generated by comparing the actual position of the motor rotor at the moment, the deviation value is input into the controller, the output control current is changed by the controller, and the deviation value enters the magnetic suspension bearing. The magnetic suspension bearing changes the electromagnetic force on the motor rotor, and the new position state of the motor rotor is measured through the position sensor. And feeding back the new rotor position state measured by the position sensor to a given expected position of the motor rotor for comparison. In this way, the control of the magnetic bearing system is achieved.
Disclosure of Invention
The invention provides a magnetic suspension bearing control system based on the running state of a motor and a control method thereof, aiming at solving the defects of the traditional magnetic suspension bearing with a position sensor, and the invention provides the following technical scheme:
a magnetic suspension bearing control system based on the running state of a motor comprises a magnetic suspension bearing controller, a driving module, a magnetic suspension bearing, a motor, current monitoring equipment and a proportional amplification module;
the magnetic suspension bearing controller control signal output end is connected with the drive module control signal input end, the drive module control signal output end is connected with the magnetic suspension bearing control signal input end, the magnetic suspension bearing control signal output end is connected with the motor control signal input end, the motor data signal output end is connected with the current monitoring equipment data signal input end, the current monitoring equipment data signal output end is connected with the proportional amplification module data signal input end, and the proportional amplification module data signal output end is connected with the magnetic suspension bearing controller data signal input end.
Preferably, the magnetic suspension bearing adopts a three-degree-of-freedom magnetic suspension bearing.
Preferably, a constant 380V alternating voltage source is built in the motor.
A magnetic suspension bearing control method based on the motor running state comprises the following steps:
step 1: setting an expected position reference quantity given by a motor rotor, and comparing the reference quantity with the state of the motor rotor at the current moment to obtain a deviation value of the position;
step 2: collecting the deviation value of the position through a controller, changing the output control current through the controller, outputting the control current for the magnetic suspension bearing, and allowing the control current to enter the magnetic suspension bearing to generate electromagnetic force;
and step 3: the motor is influenced by electromagnetic force generated in the magnetic suspension bearing and external interference, the current in the motor is changed, and the current change in the motor is monitored through current monitoring equipment;
and 4, step 4: and obtaining the position state of the motor rotor at the moment according to the relationship between the motor input current and the motor rotor position and the change of the three input currents of the motor.
Preferably, when the rotating speed of the motor is not changed, the position of the rotor is changed, namely, the air gap of the motor is changed, so that the input current of the motor is changed, and the actual position of the inner rotor of the motor at the current moment is judged by detecting the relationship between the input current of the motor and the position of the inner rotor of the motor.
Preferably, the change of the air gap of the motor is determined by analyzing the magnetic circuit of the motor body, so that the change of the air gap magnetic density of the motor becomes unbalanced, the change of the phase and amplitude of three currents input into the motor is caused, and the relation between the input current of the motor and the position of the rotor of the motor is determined.
Preferably, the motor pre-judges the radial force applied to the motor rotor in advance by analyzing the input current of the motor and the parameter structure of the motor in the stable operation process of the motor, inputs the radial force into the controller, outputs an electromagnetic force which is opposite to the radial force applied to the motor rotor in direction and equal in magnitude, and ensures the normal operation of the motor.
Preferably, the controller processes the deviation value of the collected position by using a PID control algorithm to obtain a changed output control current.
The invention has the following beneficial effects:
the invention judges the position of the rotor of the motor by monitoring the input current of the motor and uses the position as the feedback input mode of the magnetic suspension bearing controller, thereby achieving the magnetic suspension bearing without a position sensor aiming at the motor and achieving the control of the magnetic suspension bearing without the position sensor aiming at the motor. The magnetic bearing overcomes the defects of the traditional magnetic bearing with a position sensor, and solves the problems that the magnetic bearing needs to be provided with a displacement sensor to detect a displacement signal in the prior art, so that the size of the magnetic bearing is increased, and the cost requirement of the magnetic bearing is greatly improved. Meanwhile, the radial force of the motor rotor can be judged, and the reverse electromagnetic force is applied in advance, so that the anti-interference capability and the stability of the magnetic suspension bearing can be greatly improved.
Compared with the self-bearing motor in the prior art, the self-bearing motor has great limitation, and a new bearing-free motor needs to be designed for each motor, so that the resource waste is greatly increased, and the limitation is increased. The magnetic suspension bearing control system without the position sensor for the motor, which is provided by the invention, only needs to analyze the relation between the input current and the rotor displacement of each newly-loaded motor without changing the structure of the motor
Drawings
FIG. 1 is a conventional magnetic bearing control;
FIG. 2 is a magnetic suspension bearing control system structure based on the motor running state;
fig. 3 is a flow chart of a magnetic suspension bearing control method based on the motor running state.
Detailed Description
The present invention will be described in detail with reference to specific examples.
The first embodiment is as follows:
according to fig. 2, the present invention provides a magnetic suspension bearing control system based on the operation state of a motor, the system includes a magnetic suspension bearing controller, a driving module, a magnetic suspension bearing, a motor, a current monitoring device and a scale up module;
the magnetic suspension bearing controller control signal output end is connected with the drive module control signal input end, the drive module control signal output end is connected with the magnetic suspension bearing control signal input end, the magnetic suspension bearing control signal output end is connected with the motor control signal input end, the motor data signal output end is connected with the current monitoring equipment data signal input end, the current monitoring equipment data signal output end is connected with the proportional amplification module data signal input end, and the proportional amplification module data signal output end is connected with the magnetic suspension bearing controller data signal input end. The magnetic suspension bearing adopts a three-degree-of-freedom magnetic suspension bearing. A constant 380V alternating-current voltage source is arranged in the motor.
When the position state of the motor rotor is changed, the air gap area distribution in the motor can be changed, so that the air gap distribution is uneven. According to fig. 3, the present invention provides a magnetic suspension bearing control method based on the motor operation status, which includes the following steps:
step 1: setting an expected position reference quantity given by a motor rotor, and comparing the reference quantity with the state of the motor rotor at the current moment to obtain a deviation value of the position;
step 2: collecting the deviation value of the position through a controller, changing the output control current through the controller, outputting the control current for the magnetic suspension bearing, and allowing the control current to enter the magnetic suspension bearing to generate electromagnetic force; and the controller processes the deviation value of the collected position by adopting a PID control algorithm to obtain the changed output control current.
And step 3: the motor is influenced by electromagnetic force generated in the magnetic suspension bearing and external interference, the current in the motor is changed, and the current change in the motor is monitored through current monitoring equipment;
and 4, step 4: and obtaining the position state of the motor rotor at the moment according to the relationship between the motor input current and the motor rotor position and the change of the three input currents of the motor.
When the rotating speed of the motor is not changed, the position of the rotor is changed, namely, the air gap of the motor is changed, so that the input current of the motor is changed, and the actual position of the inner rotor of the motor at the current moment is judged by detecting the relation between the input current of the motor and the position of the inner rotor of the motor.
The change of the motor air gap after the magnetic circuit of the motor body is analyzed and determined changes the motor air gap flux density into unbalance, so that the three currents input into the motor are changed in phase and amplitude, and the relation between the motor input current and the position of the motor rotor is determined.
The motor pre-judges the radial force applied to the motor rotor in advance by analyzing the input current of the motor and the parameter structure of the motor in the stable operation process, inputs the radial force into the controller, outputs an electromagnetic force which has the same size and the opposite direction with the radial force applied to the motor rotor, and ensures the normal operation of the motor.
The uneven distribution of the air gaps can cause the change of the air gap flux density in the motor, and under the condition that an input power supply is a constant 380V voltage source, the input current of the motor can be influenced, so that the phase and amplitude of the three-phase current are changed. Therefore, the relation between the position of the rotor and the three currents of the motor can be calculated through the analysis of the electromagnetism in the motor. In other words, the situation that the position state of the rotor of the motor changes at the moment can be judged by monitoring the input current of the motor so as to replace the position sensor.
The invention sets the expected position of the motor rotor, generates a deviation value by comparing the actual position of the motor rotor at the moment, inputs the deviation value into the controller, changes the output control current through the controller, and enters the magnetic suspension bearing.
Magnetic bearings change the electromagnetic force on the motor rotor due to changes in the control current. The resultant force of the electromagnetic force applied by the magnetic suspension bearing and the electromagnetic force applied to the motor rotor at the moment can change the position state of the motor rotor, so that the air gap in the motor is changed.
Therefore, the position state of the motor rotor at the current moment can be judged by monitoring the input current of the motor, and then the position state is compared with the set expected position of the motor rotor. The position of a motor rotor is judged by monitoring the input current of the motor and used as the feedback input mode of a magnetic suspension bearing controller, so that the magnetic suspension bearing without the position sensor aiming at the motor is realized, and the control of the magnetic suspension bearing without the position sensor aiming at the motor is realized. The magnetic bearing overcomes the defects of the traditional magnetic bearing with a position sensor, and solves the problems that the magnetic bearing needs to be provided with a displacement sensor to detect a displacement signal in the prior art, so that the size of the magnetic bearing is increased, and the cost requirement of the magnetic bearing is greatly improved. Meanwhile, the radial force of the motor rotor can be judged, and the reverse electromagnetic force is applied in advance, so that the anti-interference capability and the stability of the magnetic suspension bearing can be greatly improved.
The position state of the motor rotor at the current moment is judged by analyzing the relation between the rotor position state of the motor during stable operation and the motor input current and monitoring the magnitude of the motor input current so as to replace the action of a position sensor in a magnetic suspension bearing. Because a position sensor is omitted, the cost, the structural complexity and the control complexity of the magnetic suspension bearing system are greatly reduced compared with the traditional magnetic suspension bearing system using the position sensor; because the magnetic suspension bearing does not need to change the internal structure of the motor, compared with a self-bearing motor, the magnetic suspension bearing has a wider application range and greatly reduces the resource waste.
The above description is only a preferred embodiment of the magnetic suspension bearing control system and the control method thereof based on the motor operation state, and the protection scope of the magnetic suspension bearing control system and the control method thereof based on the motor operation state is not limited to the above embodiments, and all technical solutions belonging to the idea belong to the protection scope of the present invention. It should be noted that modifications and variations which do not depart from the gist of the invention will be those skilled in the art to which the invention pertains and which are intended to be within the scope of the invention.
Claims (8)
1. A magnetic suspension bearing control system based on motor running state is characterized in that: the system comprises a magnetic suspension bearing controller, a driving module, a magnetic suspension bearing, a motor, current monitoring equipment and a proportional amplification module;
the magnetic suspension bearing controller control signal output end is connected with the drive module control signal input end, the drive module control signal output end is connected with the magnetic suspension bearing control signal input end, the magnetic suspension bearing control signal output end is connected with the motor control signal input end, the motor data signal output end is connected with the current monitoring equipment data signal input end, the current monitoring equipment data signal output end is connected with the proportional amplification module data signal input end, and the proportional amplification module data signal output end is connected with the magnetic suspension bearing controller data signal input end.
2. The magnetic suspension bearing control system based on the motor operation state as claimed in claim 1, wherein: the magnetic suspension bearing adopts a three-degree-of-freedom magnetic suspension bearing.
3. The magnetic suspension bearing control system based on the motor operation state as claimed in claim 1, wherein: a constant 380V alternating-current voltage source is arranged in the motor.
4. A magnetic suspension bearing control method based on the motor operation state, the method is based on a magnetic suspension bearing control system based on the motor operation state as claimed in claim 1, characterized in that: the method comprises the following steps:
step 1: setting an expected position reference quantity given by a motor rotor, and comparing the reference quantity with the state of the motor rotor at the current moment to obtain a deviation value of the position;
step 2: collecting the deviation value of the position through a controller, changing the output control current through the controller, outputting the control current for the magnetic suspension bearing, and allowing the control current to enter the magnetic suspension bearing to generate electromagnetic force;
and step 3: the motor is influenced by electromagnetic force generated in the magnetic suspension bearing and external interference, the current in the motor is changed, and the current change in the motor is monitored through current monitoring equipment;
and 4, step 4: and obtaining the position state of the motor rotor at the moment according to the relationship between the motor input current and the motor rotor position and the change of the three input currents of the motor.
5. The magnetic suspension bearing control system based on the motor operation state as claimed in claim 4, wherein: when the rotating speed of the motor is not changed, the position of the rotor is changed, namely, the air gap of the motor is changed, so that the input current of the motor is changed, and the actual position of the inner rotor of the motor at the current moment is judged by detecting the relation between the input current of the motor and the position of the inner rotor of the motor.
6. The magnetic suspension bearing control system based on the motor operation state as claimed in claim 5, wherein: the change of the motor air gap after the magnetic circuit of the motor body is analyzed and determined changes the motor air gap flux density into unbalance, so that the three currents input into the motor are changed in phase and amplitude, and the relation between the motor input current and the position of the motor rotor is determined.
7. The magnetic suspension bearing control system based on the motor operation state as claimed in claim 4, wherein: the motor pre-judges the radial force applied to the motor rotor in advance by analyzing the input current of the motor and the parameter structure of the motor in the stable operation process, inputs the radial force into the controller, outputs an electromagnetic force which has the same size and the opposite direction with the radial force applied to the motor rotor, and ensures the normal operation of the motor.
8. The magnetic suspension bearing control system based on the motor operation state as claimed in claim 4, wherein: and the controller processes the deviation value of the collected position by adopting a PID control algorithm to obtain the changed output control current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010398726.0A CN111641367A (en) | 2020-05-12 | 2020-05-12 | Magnetic suspension bearing control system based on motor running state and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010398726.0A CN111641367A (en) | 2020-05-12 | 2020-05-12 | Magnetic suspension bearing control system based on motor running state and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111641367A true CN111641367A (en) | 2020-09-08 |
Family
ID=72331094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010398726.0A Pending CN111641367A (en) | 2020-05-12 | 2020-05-12 | Magnetic suspension bearing control system based on motor running state and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111641367A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135580A (en) * | 2021-11-04 | 2022-03-04 | 珠海格力电器股份有限公司 | Position evaluation method and device for magnetic bearing rotor |
| CN116221276A (en) * | 2023-05-04 | 2023-06-06 | 山东华东风机有限公司 | Special control system and control method for magnetic suspension motor |
Citations (2)
| 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 |
| CN106499730A (en) * | 2016-11-15 | 2017-03-15 | 常州工学院 | A kind of magnetic levitation bearing system of short duration out of control after can realize the control method of settling flux |
-
2020
- 2020-05-12 CN CN202010398726.0A patent/CN111641367A/en active Pending
Patent Citations (2)
| 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 |
| CN106499730A (en) * | 2016-11-15 | 2017-03-15 | 常州工学院 | A kind of magnetic levitation bearing system of short duration out of control after can realize the control method of settling flux |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135580A (en) * | 2021-11-04 | 2022-03-04 | 珠海格力电器股份有限公司 | Position evaluation method and device for magnetic bearing rotor |
| CN114135580B (en) * | 2021-11-04 | 2022-07-26 | 珠海格力电器股份有限公司 | Position evaluation method and device for magnetic bearing rotor |
| CN116221276A (en) * | 2023-05-04 | 2023-06-06 | 山东华东风机有限公司 | Special control system and control method for magnetic suspension motor |
| CN116221276B (en) * | 2023-05-04 | 2023-08-15 | 山东华东风机有限公司 | Special control system and control method for magnetic suspension motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102072251B (en) | Control device and control method for variable bias current of flexible rotors of magnetic suspension bearings | |
| CN111641367A (en) | Magnetic suspension bearing control system based on motor running state and control method thereof | |
| CN100557102C (en) | Be used to operate the method and the motor driver of motor driver | |
| Zoubek et al. | Frequency response analysis for rolling-bearing damage diagnosis | |
| Arabacı et al. | Automatic detection and classification of rotor cage faults in squirrel cage induction motor | |
| CN1544878A (en) | Method for measuring axial displacement of electromagnet bearing rotor | |
| CN104655977B (en) | Generator excitation Winding Short Fault Diagnosis method based on torque comparison principle | |
| CN103939485A (en) | Magnetic suspension bearing digital controller with displacement sensor automatic calibration function | |
| Ghemari et al. | Defects diagnosis by vibration analysis and improvement of vibration sensor measurement accuracy | |
| KR20150140630A (en) | Magnetic bearing device, and vacuum pump provided with said magnetic bearing device | |
| Fantin Irudaya Raj et al. | Static 2D-Finite Element Analysis of Eccentricity Fault in Induction Motor | |
| CN109787515A (en) | A kind of power consumption control apparatus, magnetic suspension system and its power consumption control method | |
| Götzinger et al. | On the design of context-aware health monitoring without a priori knowledge; an AC-motor case-study | |
| Dash et al. | Condition monitoring of induction motors:—A review | |
| CN117404389A (en) | Magnetic suspension radial bearing magnetic force parameter online identification method | |
| Mo et al. | An FFT-based high-speed spindle monitoring system for analyzing vibrations | |
| KR20090120030A (en) | Dynamic characteristic analysis device of superspeed air bearing spindle | |
| Gouws | Impact of frequency switching on the efficiency of a fully suspended active magnetic bearing system | |
| Güçlü et al. | Vibration analysis of induction motors with unbalanced loads | |
| Song et al. | Effects of the slot harmonics on the stator current in an induction motor with bearing fault | |
| CN114019298B (en) | On-line monitoring method for turn-to-turn short circuit of generator rotor based on PCC-SVM | |
| CN115184013A (en) | Gas foil bearing performance detection method | |
| Irgat et al. | Detection of eccentricity faults of induction motors based on Decision Trees | |
| Prasad et al. | Bearing selection for high-speed electrical machine | |
| Purkait et al. | Influence of rotor faults on induction motor stator current Concordia patterns |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200908 |
|
| RJ01 | Rejection of invention patent application after publication |