CN1484036A - Method for testing coupling property of magnetic suspension rotor system and tesl platform - Google Patents
Method for testing coupling property of magnetic suspension rotor system and tesl platform Download PDFInfo
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- CN1484036A CN1484036A CNA031252400A CN03125240A CN1484036A CN 1484036 A CN1484036 A CN 1484036A CN A031252400 A CNA031252400 A CN A031252400A CN 03125240 A CN03125240 A CN 03125240A CN 1484036 A CN1484036 A CN 1484036A
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Abstract
The invention is a testing method of the coupled property of the magnetic suspension rotor system and the test table. It uses non-superposition of magnetic bearing's magnetic forces and superposition of the displacement to get coupled parameters such as coupled force, coupled torque, etc, and determine the relationship of the suspension forces of the magnetic pole pair in x or y direction of the magnetic bearing and the currents, namely magnetic pole suspension force-current property curve family. It uses computer to control thermal expansion extension of expansion shaft, to make the deformation beam elastically deform and further simulates micro eccentricity and tilt of rotor to design the test table, namely the whole electric control system.
Description
Technical field
The present invention relates to the magnetic levitation technology field, particularly the method for testing of magnetic suspension rotor system coupled characteristic and test board.
Background technology
Magnetic suspension rotor system is a kind of product that utilizes the magnetic bearing technology, has the advantage of magnetic bearing, is mechanical, electrical incorporate high-tech product.Magnetic bearing can stably be suspended in the space with supported part, makes between supporting member and the supported part without any Mechanical Contact.Compare with traditional bearing and to have following major advantage: contactless, there are not wearing and tearing, bearing life is unlimited in theory; The speed height, maximum linear velocity can reach 200m/s; Need not lubricated and sealing, do not produce environmental pollution; Low in energy consumption, energy-conservation; The precision height, anti-vibration, noiselessness; Be easy to realize various Based Intelligent Control.
According to the magnetic bearing principle of work, magnetic suspension rotor exists in its radial magnetic bearing that couple of force closes, magnetic coupling when real work; Exist the moment coupling between radial magnetic bearing and the radial magnetic bearing.These couplings are all influential to the design of structural design, system modelling and the control system of magnetic suspension rotor system.To above-mentioned coupled characteristic research is the problem that current magnetic suspension rotor system is theoretical and use.When these coupled characteristics are studied, be the pith of research work with the power of experimental technique test coupling and the rule of coupling generation thereof, also be confirmation and correction to theoretical study results.
Have not yet to see the report of relevant magnetic suspension rotor system coupling characteristic test experiment table.
Summary of the invention
Technical matters to be solved by this invention is: method of testing and test board that a kind of magnetic suspension rotor system coupled characteristic is provided.This method of testing provides means for the experiment of the multiple coupled characteristic of magnetic suspension rotor system.Utilize the test board of this method of testing design, can test the multiple coupling parameter that causes by radial magnetic bearing.
The technical scheme that the present invention solves its technical matters employing is as follows:
The method of testing of the magnetic suspension rotor system coupled characteristic that provides, the step of its test bonding force comprises: at first test out the suspending power of radial magnetic bearing under a certain offset situation; Utilize the superposability of displacement then, and the not superposability of the magnetic force of magnetic bearing, test out radial magnetic bearing under above-mentioned offset situation, the suspension component on x, the corresponding displacement component of y grid bearing, and suspension component is synthetic; The suspending power of twice test poor is the value of bonding force.The step of its test coupling torque comprises: test out the suspending power of each radial magnetic bearing under a certain rotor tilt angle at first respectively; Be a dynamic balance system with magnetic suspension rotor then, utilize Principles of Statics to calculate rotor suffered coupling moment under this rotor tilt angle.
Implement the test board of said method, its structure is: comprise machinery and automatically controlled part.
Mechanical part: comprise two radial magnetic bearings and the stator body that is attached thereto, the rotor that overlaps with stator body centre of gyration line, and base plate.The middle part of base plate has a T-slot, base plate is divided into left and right two halves, left-half is by bolt, right half part is then freely placed and is supported by the vertical expansion axle, base plate fluting back forms a long and narrow zone at the middle part, this long and narrow zone is a variable shaped beam, and its two ends, channel opening place closely link to each other with the two ends of horizontal expansion axle.Each is fixed on rotor and stator body on the base plate by a support.Stator body is made up of pressure transducer and the radial magnetic bearing that is attached thereto.Variable shaped beam on the base plate produces elastic deformation under the driving of the thermal distortion forces of horizontal expansion axle or vertical expansion axle, i.e. flexural deformation or torsional deflection, the eccentric or inclination of simulated machine rotor respectively.
Automatically controlled part: by power amplifier, buffer circuit, electrical heating elements, temperature sensor and amplifying circuit, pressure transducer and D/A change-over circuit are formed, its signal all through interface circuit to computing machine, machine is handled the control signal that the back forms radial magnetic bearing as calculated.
The present invention has following major advantage:
One. coupled characteristics such as this method of testing can be closed for the couple of force of magnetic suspension rotor system, moment coupling, magnetic coupling provide laboratory facilities.
They are two years old. and this method of testing can also provide theory and experimental data for the design of structural design, system modelling and the control system of magnetic suspension rotor system.
They are three years old. and this test board is a kind of instrument that carries out scientific research with experimental technique, and it can test the multiple coupling parameter that is caused by radial magnetic bearing in the magnetic suspension rotor system.
They are four years old. and this test board provides the experiment test means for magnetic bearing and other magnetic suspension rotor development of series product, exploitation and production.
Description of drawings
Fig. 1 is the structural representation of test board.
Fig. 2 is a B-B cutaway view Amplified image among Fig. 1.
Fig. 3 is the synoptic diagram that base plate 5 links to each other with horizontal expansion axle 8, vertical expansion axle 7 and variable shaped beam 3 among Fig. 1.
Fig. 4 is a rotor 6 and the mutual alignment of radial magnetic bearing 1, radial magnetic bearing 4, pressure transducer 11 concerns synoptic diagram.
Fig. 5 is the electric control principle block diagram of test board.
Embodiment
The invention will be further described below in conjunction with example and accompanying drawing.
The inventor is by finding the Coupling Research of magnetic suspension rotor system: in magnetic suspension rotor system, the bonding force of radial magnetic bearing is that the off-centre by rotor causes, and coupling torque is caused by rotor tilt.Therefore testing the eccentric of bonding force, coupling moment simulation magnetic suspension rotor and tilting is the key of problem.Suspending power F
YyBe in bonding force F on 90 ° and the 270 ° of orientation in off-centre
Yx=0, promptly on the y axle, there is not bonding force; Suspending power F
XxBe in bonding force F on 0 ° and the 180 ° of orientation in off-centre
Xy=0, promptly on the x axle, there is not bonding force.And when being in other orientation, off-centre all has bonding force.Can be defined as this phenomenon: the not superposability of the magnetic force of radial magnetic bearing.Be in the radial magnetic bearing plane, except that grid bearing, the suspending power on any direction can not be obtained by the suspending power stack of grid bearing.Above-mentioned principle can be expressed as: F=F
Yy+ F
Yx+ F
XxWith F
Xy
Thus, can design the method for testing and the test board of following magnetic suspension rotor system coupled characteristic.
One. the method for testing of magnetic suspension rotor system coupled characteristic
Test philosophy: utilize the test philosophy of superposability of not superposability, the displacement of the magnetic force of magnetic bearing, measure in the magnetic suspension rotor system off-centre and coupling characterisitic parameters such as the coupling power that tilts to cause, coupling moment because of rotor.Measure radial magnetic bearing x or the suspending power of y direction pole pair and the relation between the electric current, i.e. magnetic pole suspending power-current characteristics family of curves.
1. the method for testing of bonding force
Its step comprises: at first test out the suspending power of radial magnetic bearing under a certain offset situation; Utilize the superposability of displacement then, and the not superposability of the magnetic force of magnetic bearing, test out radial magnetic bearing under above-mentioned offset situation, the suspension component on x, the corresponding displacement component of y grid bearing, and suspension component is synthetic; The suspending power of twice test poor is the value of bonding force.
Under same offset situation, with F
1Expression comprises the actual suspending power or the actual magnetic moment of bonding force, with F
2Expression is by x, and the suspending power that the suspension component on the y grid bearing is synthetic is represented F with F
1With F
2Poor, then above-mentioned method of testing can be represented by following computing formula:
Select specific eccentric orientation can demarcate F
Yx, F
XyParticular value, for example 0 °, 90 °.Theoretically, method is fully by experiment measured the size and the variation tendency thereof of the bonding force of magnetic bearing, need abundant test value, but because its variation tendency is drawn by Theoretical Calculation, so only need limited several points, the size of demarcating bonding force can draw the size and the variation tendency thereof of magnetic bearing bonding force.
Concrete steps below in conjunction with the test of accompanying drawing narration bonding force comprise:
A. measure under the no couple state radial magnetic bearing x or the suspending power of y direction pole pair and the relation between the electric current, i.e. magnetic pole suspending power-current characteristics.
Its step comprises: rotor 6 and support 2 are connected as a single entity; By the temperature of computer control vertical expansion axle 7, set up offset; The spring 12 of lock pressure sensor 11 rear ends is promptly eliminated the effect of spring; Disengagement rotor 6 connects with support 2, makes rotor 6 freedom; Radial magnetic bearing x or y direction pole pair are switched in the mode of differential excitation, measure the magnetic pole suspending power of magnetic bearing and the relation between the electric current; Set up next offset; Repeat said process, until drawing radial magnetic bearing magnetic pole suspending power-current characteristics family of curves.
B. demarcate offset: offset is to demarcate with the value of pressure transducer 11.
Its step comprises: rotor 6 and support 2 are connected as a single entity; By the temperature of computer control vertical expansion axle 7, set up offset; The spring 12 of pressure transducer 11 rear ends is out of shape under the extruding of rotor 6 off-centre, and its force value that is proportional to offset is recorded by sensor, and is transferred in the computing machine; The force value of this offset correspondence under the computer recording.
C. measure under the couple state, radial magnetic bearing when above-mentioned offset, the current value of x and y direction, promptly radial magnetic bearing comprises the suspending power value of bonding force when above-mentioned offset.
Its step comprises: disengagement rotor 6 connects with support 2, makes rotor 6 freedom; Under the control of computing machine, radial magnetic bearing x and y direction are regulated electric current gradually, and till corresponding sensor reached the force value that step b records, promptly rotor produced the offset of above-mentioned size under the suspending power effect of magnetic bearing; Note the current value of this moment radial magnetic bearing x and y direction magnetic pole respectively, draw this state low suspension power value by magnetic pole suspending power-current characteristics curve then.
D. utilize displacement superposed principle, the offset that step b is demarcated decomposes on x and the y direction; Decomposing under the state of offset, measure the current value of radial magnetic bearing respectively in x and y direction, method of testing and step c are basic identical, and the test that different is on x and the y direction is separately carried out.
E. calculate bonding force.
F. change offset, repeating step a～c.
G. change support height h, repeating step a～c.
H. by experimental data and calculated value, draw the bonding force and the variation tendency thereof of radial magnetic bearing.
2. coupling torque method of testing
Its step comprises: test out the suspending power of each radial magnetic bearing under a certain rotor tilt angle at first respectively; Be a dynamic balance system with magnetic suspension rotor then, utilize Principles of Statics to calculate rotor suffered coupling moment under this rotor tilt angle.
Concrete steps below in conjunction with accompanying drawing narration coupling moment comprise:
A. measure under the no couple state radial magnetic bearing x or the suspending power of y direction pole pair and the relation between the electric current, i.e. magnetic pole suspending power-current characteristics.
Its step comprises: rotor 6 and support 2 are connected as a single entity; By the temperature of computer control vertical expansion axle 7, set up offset; The spring 12 of lock pressure sensor 11 rear ends is promptly eliminated the effect of spring; Disengagement rotor 6 connects with support 2, makes rotor 6 freedom; Radial magnetic bearing x or y direction pole pair are switched in the mode of differential excitation, measure the magnetic pole suspending power of magnetic bearing and the relation between the electric current; Set up next offset; Repeat said process, until drawing radial magnetic bearing magnetic pole suspending power-current characteristics family of curves.
B. demarcate the axis tilt amount: the axis tilt amount is to demarcate with the value of pressure transducer.
Its step comprises: coupled rotor 6 is one with support 2; By the temperature of computer control horizontal expansion axle 8, set up the axis tilt amount; The spring 12 of pressure transducer 11 rear ends is out of shape under the extruding of rotor 6 axis tilts, and its force value that is proportional to the axis tilt amount is recorded by sensor, and is transferred in the computing machine; The force value of this axis tilt amount correspondence under the computer recording.
C. measure under the couple state, radial magnetic bearing under the offset situation that above-mentioned rotor tilt causes, the current value of x and y direction, promptly radial magnetic bearing comprises the suspending power value of bonding force when described offset.
Its step comprises: disengagement rotor 6 connects with support 2, makes rotor 6 freedom; Under the control of computing machine, radial magnetic bearing x and y direction are regulated electric current gradually, and till corresponding sensor reached the force value that step b records, promptly rotor produced the offset of above-mentioned size under the suspending power effect of magnetic bearing; Note the current value of this moment radial magnetic bearing x and y direction magnetic pole respectively, draw the suspending power value by magnetic pole suspending power-current characteristics curve.
D. be the dynamic balance system with the magnetic suspension rotor, calculate coupling torque.
E. change the rotor tilt amount, repeating step a～e.
F. by experimental data and calculated value, draw the coupling torque and the variation tendency thereof of radial magnetic bearing.
Two. the test board of magnetic suspension rotor system coupled characteristic
Magnetic suspension rotor system is in real work, and rotor 6 is suspended in the space, so not only there is radial disbalance in rotor 6, also has the inclination along rotor axis.In order to simulate the actual working state of magnetic suspension rotor, test board must realize that controllable radial disbalance is regulated and the angle of inclination is regulated.Because off-centre and axis tilt during the magnetic suspension rotor real work are very little, therefore, rotor eccentricity the during real work of simulation magnetic suspension rotor and axis tilt are to realize by the heat distortion amount of control thermal expansion axle.
Therefore, test board design of the present invention: with the thermal expansion elongation of computer-controlled main axis of dilatation, the method for the elastic bending deflection of variable shaped beam, elastic torsion distortion, the small off-centre and the small skew of model rotor.Control radial magnetic bearing x and the variation of y direction magnetic pole electric current respectively with computing machine.And the whole electric control system of test board.
Narrate the concrete structure and the course of work of test board below.
1. structure: comprise machinery and automatically controlled part.
The structure of mechanical part such as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4: comprise base plate 5, radial magnetic bearing 1,4 and the stator body 9 that is attached thereto, and the rotor 6 that overlaps with stator body 9 centre of gyration lines.The middle part of base plate 5 has a T-slot, base plate is divided into left and right two halves, left-half is by bolt, right half part is then freely placed and is supported by vertical expansion axle 7, base plate fluting back forms a long and narrow zone at the middle part, this long and narrow zone is a variable shaped beam 3, and its two ends, channel opening place closely link to each other with the two ends of horizontal expansion axle 8.Rotor 6 and stator body 9 respectively are fixed on the base plate 5 by a support 2.Stator body 9 is made up of pressure transducer 11 and radial magnetic bearing 4.Variable shaped beam 3 on the base plate 5 is in the time of can producing flexural deformation or torsional deflection, respectively in order to the eccentric of simulated machine rotor or tilt under the driving of the thermal distortion forces of horizontal expansion axle 8 or vertical expansion axle 7.
Radial magnetic bearing 4 shells are provided with four projections 13, and the inner chamber of each projection 13 is provided with spring 12.Pressure transducer 11, the one end contacts with the cylindrical of rotor 6, and the other end contacts with spring 12.Sequence number 10 is coupling bolts.
The structure of automatically controlled part is as shown in Figure 5: by power amplifier, buffer circuit, electrical heating elements, temperature sensor and amplifying circuit, pressure transducer and D/A change-over circuit are formed, its signal all through interface circuit to computing machine, machine is handled the control signal that the back forms radial magnetic bearing as calculated.
Each circuit connecting relation is: power amplifier and electric heating circuit are through buffer circuit; Temperature sensor is through amplifying circuit; Pressure transducer is through the D/A change-over circuit; Link to each other with computing machine by interface circuit one by one.The control signal of the radial magnetic bearing interface circuit of machine as calculated is divided into four tunnel: one tunnel Control current i that magnetic pole on the y direction is provided
yOne the tunnel provides the Control current i of magnetic pole on the x direction
xOne the tunnel provides the bias current i of magnetic pole on the y direction
oOne the tunnel provides the bias current i of magnetic pole on the x direction
o(i
o+ i
y) through power amplifier to magnetic pole 1,2; (i
o-i
y) through power amplifier to magnetic pole 5,6; (i
o+ i
x) through power amplifier to magnetic pole 0,7; (i
o-i
x) through power amplifier to magnetic pole 3,4.
2. the supplementary notes of the course of work: the length variations of horizontal expansion axle 8, make the variable shaped beam 3 on the base plate 5 occur bending and deformation, even the feasible axis run-off the straight that is installed in two supports 2 of base plate both sides of the relative flexural deformation of base plate 5 left and right two halves is the axis run-off the straight of stator body 9 and rotor 6.The length variations of vertical expansion axle 7, it is eccentric to make that variable shaped beam 3 distortion that twists, the relative torsional deflection of base plate 5 left and right two halves make that the axis of two supports 2 takes place, even the axis of stator body 9 and rotor 6 takes place eccentric.(position shown in Figure 2, its off-centre promptly occur on 0 ° of orientation) can be regulated by the height h that adjusts support 2 in eccentric orientation on the x axle.
Technical scheme of the present invention is not considered the influence of axial magnetic bearing to system, can not test the coupling torque that cod causes.
Claims (9)
1. the method for testing of a magnetic suspension rotor system coupled characteristic is characterized in that described method of testing, and its step comprises: at first test out the suspending power of radial magnetic bearing under a certain offset situation; Utilize the superposability of displacement then, and the not superposability of the magnetic force of magnetic bearing, test out radial magnetic bearing under above-mentioned offset situation, the suspension component on x, the corresponding displacement component of y grid bearing, and suspension component is synthetic; The suspending power of twice test poor is the value of bonding force.
2. the method for testing of magnetic suspension rotor system coupled characteristic according to claim 1 is characterized in that the concrete steps of bonding force test comprise:
A. measure under the no couple state, radial magnetic bearing x or the suspending power of y direction pole pair and the relation between the electric current, i.e. magnetic pole suspending power-current characteristics,
Its step comprises: rotor (6) and support (2) are connected as a single entity; By the temperature of computer control vertical expansion axle (7), set up offset; The spring (12) of lock pressure sensor (11) rear end is promptly eliminated the effect of spring; Disengagement rotor (6) connects with support (2), makes rotor (6) freedom; Radial magnetic bearing x or y direction pole pair are switched in the mode of differential excitation, measure the magnetic pole suspending power of magnetic bearing and the relation between the electric current; Set up next offset; Repeat said process, until drawing radial magnetic bearing magnetic pole suspending power-current characteristics family of curves,
B. demarcate offset: offset is to demarcate with the value of pressure transducer (11),
Its step comprises: rotor (6) and support (2) are connected as a single entity; By the temperature of computer control vertical expansion axle (7), set up offset; The spring (12) of pressure transducer (11) rear end is distortion under the extruding of rotor (6) off-centre, and its force value that is proportional to offset is recorded by sensor, and is transferred in the computing machine; The force value of this offset correspondence under the computer recording,
C. measure under the couple state, radial magnetic bearing when above-mentioned offset, the current value of x and y direction, promptly radial magnetic bearing comprises the suspending power value of bonding force when above-mentioned offset,
Its step comprises: disengagement rotor (6) connects with support (2), makes rotor (6) freedom; Under the control of computing machine, radial magnetic bearing x and y direction are regulated electric current gradually, and till corresponding sensor reached the force value that step b records, promptly rotor produced the offset of above-mentioned size under the suspending power effect of magnetic bearing; Note the current value of this moment radial magnetic bearing x and y direction magnetic pole respectively, draw this state low suspension power value by magnetic pole suspending power-current characteristics curve then,
D. utilize displacement superposed principle, the offset that step b is demarcated decomposes on x and the y direction; Decomposing under the state of offset, measure the current value of radial magnetic bearing respectively in x and y direction, method of testing and step c are basic identical, and the test that different is on x and the y direction is separately carried out,
E. calculate bonding force,
F. change offset, repeating step a～c,
G. change support height h, repeating step a～c,
H. by experimental data and calculated value, draw the bonding force and the variation tendency thereof of radial magnetic bearing.
3. the method for testing of a magnetic suspension rotor system coupled characteristic is characterized in that described method of testing, and its step comprises: test out the suspending power of each radial magnetic bearing under a certain rotor tilt angle at first respectively; Be a dynamic balance system with magnetic suspension rotor then, utilize Principles of Statics to calculate rotor suffered coupling moment under this rotor tilt angle.
4. the method for testing of magnetic suspension rotor system coupled characteristic according to claim 3 is characterized in that the concrete steps of coupling torque test comprise:
A. measure under the no couple state, radial magnetic bearing x or the suspending power of y direction pole pair and the relation between the electric current, i.e. magnetic pole suspending power-current characteristics,
Its step comprises: rotor (6) and support (2) are connected as a single entity; By the temperature of computer control vertical expansion axle (7), set up offset; The spring (12) of lock pressure sensor (11) rear end is promptly eliminated the effect of spring; Disengagement rotor (6) connects with support (2), makes rotor (6) freedom; Radial magnetic bearing x or y direction pole pair are switched in the mode of differential excitation, measure the magnetic pole suspending power of magnetic bearing and the relation between the electric current; Set up next offset; Repeat said process, until drawing radial magnetic bearing magnetic pole suspending power-current characteristics family of curves,
B. demarcate the axis tilt amount: the axis tilt amount is to demarcate with the value of pressure transducer,
Its step comprises: coupled rotor (6) is an one with support (2); By the temperature of computer control horizontal expansion axle (8), set up the axis tilt amount; The spring (12) of pressure transducer (11) rear end is out of shape under the extruding of rotor (6) axis tilt, and its force value that is proportional to the axis tilt amount is recorded by sensor, and is transferred in the computing machine; The force value of this axis tilt amount correspondence under the computer recording,
C. measure under the couple state, radial magnetic bearing under the offset situation that above-mentioned rotor tilt causes, the current value of x and y direction, promptly radial magnetic bearing comprises the suspending power value of bonding force when described offset,
Its step comprises: disengagement rotor (6) connects with support (2), makes rotor (6) freedom; Under the control of computing machine, radial magnetic bearing x and y direction are regulated electric current gradually, and till corresponding sensor reached the force value that step b records, promptly rotor produced the offset of above-mentioned size under the suspending power effect of magnetic bearing; Note the current value of this moment radial magnetic bearing x and y direction magnetic pole respectively, draw the suspending power value by magnetic pole suspending power-current characteristics curve,
D. be the dynamic balance system with the magnetic suspension rotor, calculate coupling torque,
E. change the rotor tilt amount, repeating step a～e,
F. by experimental data and calculated value, draw the coupling torque and the variation tendency thereof of radial magnetic bearing.
5. test board of implementing claim 1 or 2 or 3 or 4 described methods is characterized in that: comprise machinery and automatically controlled part,
Mechanical part: comprise base plate (5), radial magnetic bearing (1), (4) and the stator body (9) that is attached thereto, and the rotor (6) that overlaps with stator body (9) centre of gyration line; The middle part of base plate (5) has a T-slot, base plate is divided into left and right two halves, and left-half is by bolt, and right half part is then freely placed and supported by vertical expansion axle (7), base plate fluting back forms a long and narrow zone at the middle part, and this long and narrow zone is variable shaped beam (3); Its two ends, channel opening place closely link to each other with the two ends of horizontal expansion axle (8); Each is fixed on rotor (6) and stator body (9) on the base plate (5) by a support (2); Stator body (9) is made up of pressure transducer (11) and radial magnetic bearing (4); Variable shaped beam (3) on the base plate (5) produces elastic deformation under the driving of the thermal distortion forces of horizontal expansion axle (8) or vertical expansion axle (7), i.e. flexural deformation or torsional deflection, and the eccentric or inclination of simulated machine rotor respectively,
Automatically controlled part: by power amplifier, buffer circuit, electrical heating elements, temperature sensor and amplifying circuit, pressure transducer and D/A change-over circuit are formed, its signal all through interface circuit to computing machine, machine is handled the control signal that the back forms radial magnetic bearing as calculated.
6. test board according to claim 5 is characterized in that: on the outside surface of vertical expansion axle (7) and horizontal expansion axle (8), be respectively with temperature sensor and by the heating of computer control temperature.
7. test board according to claim 5 is characterized in that pressure transducer (11), and the one end contacts with the cylindrical of rotor, and the other end contacts with the spring (12) of projection (13) inner chamber that is positioned at radial magnetic bearing (4) shell.
8. test board according to claim 5 is characterized in that in the automatically controlled part, power amplifier and electric heating circuit are through buffer circuit; Temperature sensor is through amplifying circuit; Pressure transducer is through the D/A change-over circuit; Link to each other with computing machine by interface circuit one by one.
9. test board according to claim 5, the control signal that it is characterized in that the radial magnetic bearing interface circuit of machine as calculated are divided into four tunnel: one tunnel Control current i that magnetic pole on the y direction is provided
yOne the tunnel provides the Control current i of magnetic pole on the x direction
xOne the tunnel provides the bias current i of magnetic pole on the y direction
0One the tunnel provides the bias current i of magnetic pole on the x direction
0(i
o+ i
y) through power amplifier to magnetic pole 1,2; (i
o-i
y) through power amplifier to magnetic pole 5,6; (i
o+ i
x) through power amplifier to magnetic pole 0,7; (i
o-i
x) through power amplifier to magnetic pole 3,4.
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|---|---|---|---|
| CN 03125240 CN1225659C (en) | 2003-08-07 | 2003-08-07 | Method for testing coupling property of magnetic suspension rotor system and tesl platform |
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|---|---|---|---|
| CN 03125240 CN1225659C (en) | 2003-08-07 | 2003-08-07 | Method for testing coupling property of magnetic suspension rotor system and tesl platform |
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| CN116067401A (en) * | 2023-03-31 | 2023-05-05 | 清华大学 | Rotor heating method, apparatus, electronic device, storage medium, and program product |
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