CN102829082A - Method for reducing impact of rotor in floating process in magnetic bearing system - Google Patents
Method for reducing impact of rotor in floating process in magnetic bearing system Download PDFInfo
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- CN102829082A CN102829082A CN2012103261610A CN201210326161A CN102829082A CN 102829082 A CN102829082 A CN 102829082A CN 2012103261610 A CN2012103261610 A CN 2012103261610A CN 201210326161 A CN201210326161 A CN 201210326161A CN 102829082 A CN102829082 A CN 102829082A
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Abstract
The invention relates to the technical field of a magnetic bearing system and discloses a method for reducing the impact of a rotor in a floating process in a magnetic bearing system. The method comprises the following steps of: S1, calculating an output position instruction for reducing the impact of the rotor in the floating process; S2, calculating an output current instruction according to the output position instruction; S3, converting the output current instruction into a current value; and S4, converting the current value into magnetic force controlling the position of the rotor, and controlling the position of the rotor through the magnetic force. The method disclosed by the invention is capable of reducing the impact of the rotor during the floating process in the magnetic bearing system.
Description
Technical field
The present invention relates to the magnetic bearing system technical field, particularly relate to a kind of magnetic bearing system rotor that reduces and play the method that floating process is impacted.
Background technique
Magnetic bearing system is a kind of no friction, non-lubricating bearing arrangement, is applicable to that some has the rotating machinery of specific demand, and the application of magnetic bearing is increasingly extensive at present.During magnetic bearing system work, rotor receives the electromagnetic force effect and remains on state of suspension, and is contactless with stator module.Magnetic bearing itself is unsettled, therefore needs to be suspended in the working position in real time according to the position regulation electromagnetic force of rotor with could guaranteeing rotor stability.The adjusting of the electromagnetic force of magnetic bearing realizes through regulating shaft current.When magnetic bearing system was not worked, rotor did not receive the electromagnetic force effect, under the effect of gravity, fell within on the stator module.Playing floating process is rotor changes to state of suspension from non-state of suspension process.In traditional Active Magnetic Bearing Control method, generally specialized designs does not play floating process control algorithm, but the control program that directly adopts stable state to suspend has been realized floating.
Under the situation of system's proper functioning, control program always makes rotor stability be suspended in the position of setting according to the position command amount, and when the position command quantitative change, rotor also can be along with the position that moves to setting.Usually, the displacement when the working position of regulation rotor is 0 in magnetic bearing system, and displacement was-s when rotor fell within on the stator module
0, s wherein
0＞0 is the distance of rotor lowering position and working position.In traditional Active Magnetic Bearing Control method; The specialized designs rotor does not play floating control algorithm; And the control program that directly adopts stable state to suspend has been realized floating, and that is to say that the position command amount in a floating process is always 0, control algorithm try hard to rotor stability to the position 0 place.Because electromagnetic force and magnetic air gap are the inverse square relation, and rotor when full state on the magnetic bearing magnetic air gap bigger, so the bigger electric current of need just can overcome gravity, make rotor break away from non-state of suspension.But, along with rotor near the working position of setting, the magnetic bearing magnetic air gap reduces gradually, under the constant situation of electric current, will cause electromagnetic force sharply to increase, rotor-position is easy to very big overshoot takes place, and causes very big impact.This impact possibly cause magnetic bearing system to damage.
Summary of the invention
The technical problem that (one) will solve
The technical problem that the present invention will solve is: how to reduce the impact that the magnetic bearing system rotor plays floating process.
(2) technological scheme
In order to solve the problems of the technologies described above, the present invention provides a kind of magnetic bearing system rotor that reduces to play the method that floating process is impacted, and may further comprise the steps:
S1, calculating are used for reducing rotor and are playing the outgoing position instruction that floating process is impacted;
S2, according to the instruction of said outgoing position command calculations output current;
S3, the output current instruction transformation is become current value;
S4, with current value convert to control said rotor-position electromagnetic force, utilize said electromagnetic force to control said rotor-position.
Preferably, calculating said outgoing position instruction among the step S1 specifically comprises:
S11, set position, rotor whereabouts and working position apart from s
0, the position command switching cycle is counted A, and position command number of levels N;
S12, initialization iteration step number k=0 and current location instruction-level p=1;
S13, make k=k+1;
S14, if k >=pA and p＜N, then make p=p+1; Otherwise keep p constant;
S15, calculating outgoing position instruction
S16, return step S13 and continue to calculate, reach predefined value up to k.
Preferably, utilize the power amplifier in the magnetic bearing system that the output current instruction transformation is become current value.
Preferably, utilize the magnetic bearing in the magnetic bearing system said current value to be converted to the electromagnetic force of controlling said rotor-position.
(3) beneficial effect
Technique scheme has following advantage: the present invention rises in the floating process at rotor, adopts the position command amount that progressively increases of classification, thereby realizes that soft of rotor is floating, has reduced the impact of floating process.
Description of drawings
Fig. 1 is a method flow diagram of the present invention;
Fig. 2 is the flow chart that calculates the outgoing position instruction among Fig. 1.
Embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail.Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
As shown in Figure 1, the present invention provides a kind of magnetic bearing system rotor that reduces to play the method that floating process is impacted, and may further comprise the steps:
S1, calculating are used for reducing rotor and are playing the outgoing position instruction that floating process is impacted;
S2, according to the instruction of said outgoing position command calculations output current, the process of calculating the output current instruction is an existing technology, the output current that is calculated instruction is the numeral corresponding with current value;
S3, the output current instruction transformation is become current value;
S4, with current value convert to control said rotor-position electromagnetic force, utilize said electromagnetic force to control said rotor-position.
Above-mentioned magnetic bearing system; Comprise frame, rotor, drive motor, magnetic bearing, displacement transducer, power amplifier, controller, displacement transducer all is arranged on the frame, and the output terminal of displacement transducer is electrically connected on the controller; The instruction output of controller is electrically connected on the power amplifier; Magnetic bearing is arranged on the frame, and the input end of magnetic bearing is electrically connected on the power amplifier, and rotor and drive motor are through the coupling mechanical connection; Except that with drive motor is connected; Miscellaneous part does not have machinery and contact in lower rotor part and the system in working order, keeps certain interval, and a preset rotor-position control module and the rotor of being equipped with rises and float process position command generating module in the controller.Said rotor plays the calculating that floating process position command generating module is used to realize the outgoing position instruction.Need to prove that rotor plays floating process position command generating module and also can be arranged on outside the magnetic bearing system, in this case, controller (magnetic bearing system in other words) does not just comprise rotor and plays floating process position command generating module.
When rotor is in full state, call rotor and play floating process position command generating module and rotor-position control module, realize that rising of rotor is floating.When carrying out method of the present invention, rotor plays floating process position command module and circulates with the fixing sampling period with the rotor-position control module and carry out.Play floating process position command module by rotor in each cycle period and calculate the rotor-position command value; Output to the rotor-position control module subsequently; Said rotor-position control module is calculated the output current instruction, and the output current instruction is sent to power amplifier, by power amplifier the output current instruction is changed into current value; Magnetic bearing converts said current value to control said rotor rotation electromagnetic force, utilizes said electromagnetic force to control said rotor rotation.
As shown in Figure 2, calculate said outgoing position instruction among the step S1 and specifically comprise:
S11, set position, rotor whereabouts and working position apart from s
0, the position command switching cycle is counted A, and position command number of levels N;
S12, initialization iteration step number k=0 and current location instruction-level p=1;
S13, make k=k+1;
S14, if k >=pA and p＜N, then make p=p+1; Otherwise keep p constant;
S15, calculating outgoing position instruction
S16, return step S13 and continue to calculate, reach predefined value up to k.
The present invention directly calculates output current according to position command 0, but progressively improves position command.Thus, begin from full state, rotor will at first rise and float to first specified position, because this position and lowering position are comparatively approaching, can not produce greater impact so play floating process; Treat rotor arrival and basicly stable behind first specified position, floating again to next specified position, and the like, up to arriving and stably be suspended in position 0.Therefore in whole process, can not produce greater impact all the time, overcome directly to rise and floatingly possibly produce the problem of great impact.Therefore, the invention has the advantages that adopting the present invention that the rotor of magnetic bearing system is impacted reduces in playing floating process.
Can find out that by above embodiment the present invention rises in the floating process at rotor, adopt the position command amount that progressively increases of classification, thereby realize that soft of rotor is floating, reduce the impact of floating process.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and replacement, these improvement and replacement also should be regarded as protection scope of the present invention.
Claims (4)
1. one kind reduces the method that the magnetic bearing system rotor plays floating process impact, it is characterized in that, may further comprise the steps:
S1, calculating are used for reducing rotor and are playing the outgoing position instruction that floating process is impacted;
S2, according to the instruction of said outgoing position command calculations output current;
S3, the output current instruction transformation is become current value;
S4, with current value convert to control said rotor-position electromagnetic force, utilize said electromagnetic force to control said rotor-position.
2. the method for claim 1 is characterized in that, calculates said outgoing position instruction among the step S1 and specifically comprises:
S11, set position, rotor whereabouts and working position apart from s
0, the position command switching cycle is counted A, and position command number of levels N;
S12, initialization iteration step number k=0 and current location instruction-level p=1;
S13, make k=k+1;
S14, if k >=pA and p＜N, then make p=p+1; Otherwise keep p constant;
S15, calculating outgoing position instruction
S16, return step S13 and continue to calculate, reach predefined value up to k.
3. method as claimed in claim 2 is characterized in that, utilizes the power amplifier in the magnetic bearing system that the output current instruction transformation is become current value.
4. like each described method in the claim 1 ~ 3, it is characterized in that, utilize the magnetic bearing in the magnetic bearing system said current value to be converted to the electromagnetic force of controlling said rotor-position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210326161.0A CN102829082B (en) | 2012-09-05 | 2012-09-05 | Method for reducing impact of rotor in floating process in magnetic bearing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210326161.0A CN102829082B (en) | 2012-09-05 | 2012-09-05 | Method for reducing impact of rotor in floating process in magnetic bearing system |
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| CN102829082A true CN102829082A (en) | 2012-12-19 |
| CN102829082B CN102829082B (en) | 2015-07-15 |
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| CN201210326161.0A Active CN102829082B (en) | 2012-09-05 | 2012-09-05 | Method for reducing impact of rotor in floating process in magnetic bearing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113280041A (en) * | 2021-05-20 | 2021-08-20 | 珠海格力电器股份有限公司 | Magnetic suspension bearing and control method and device thereof, storage medium and processor |
| CN114593151A (en) * | 2022-04-20 | 2022-06-07 | 南京磁之汇电机有限公司 | Magnetic suspension bearing stopping method and device, electronic equipment and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08200364A (en) * | 1995-01-20 | 1996-08-06 | Hitachi Ltd | Control method for magnetic bearing and device thereof |
| CN1710800A (en) * | 2005-07-08 | 2005-12-21 | 北京航空航天大学 | Magnetic bearing control system of accurately compensating magnetic suspension control torque gyroscope support rigidity |
| CN101510098A (en) * | 2009-03-17 | 2009-08-19 | 中国船舶重工集团公司第七一〇研究所 | Mixing magnetic circuit magnetic suspension bearing integration controller |
| CN102425554A (en) * | 2011-11-10 | 2012-04-25 | 北京中科科仪技术发展有限责任公司 | Gain scheduling control method for magnetic suspension molecular pump |
-
2012
- 2012-09-05 CN CN201210326161.0A patent/CN102829082B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08200364A (en) * | 1995-01-20 | 1996-08-06 | Hitachi Ltd | Control method for magnetic bearing and device thereof |
| CN1710800A (en) * | 2005-07-08 | 2005-12-21 | 北京航空航天大学 | Magnetic bearing control system of accurately compensating magnetic suspension control torque gyroscope support rigidity |
| CN101510098A (en) * | 2009-03-17 | 2009-08-19 | 中国船舶重工集团公司第七一〇研究所 | Mixing magnetic circuit magnetic suspension bearing integration controller |
| CN102425554A (en) * | 2011-11-10 | 2012-04-25 | 北京中科科仪技术发展有限责任公司 | Gain scheduling control method for magnetic suspension molecular pump |
Non-Patent Citations (1)
| Title |
|---|
| 苏义鑫，等: "主动磁轴承的Matlab仿真研究", 《武汉化工学院学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113280041A (en) * | 2021-05-20 | 2021-08-20 | 珠海格力电器股份有限公司 | Magnetic suspension bearing and control method and device thereof, storage medium and processor |
| CN113280041B (en) * | 2021-05-20 | 2022-05-10 | 珠海格力电器股份有限公司 | Magnetic suspension bearing and control method and device thereof, storage medium and processor |
| CN114593151A (en) * | 2022-04-20 | 2022-06-07 | 南京磁之汇电机有限公司 | Magnetic suspension bearing stopping method and device, electronic equipment and storage medium |
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| CN102829082B (en) | 2015-07-15 |
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