CN102109416B - Non-contact electromagnetic loading device for high speed electric spindle - Google Patents

Non-contact electromagnetic loading device for high speed electric spindle Download PDF

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Publication number
CN102109416B
CN102109416B CN2010105894021A CN201010589402A CN102109416B CN 102109416 B CN102109416 B CN 102109416B CN 2010105894021 A CN2010105894021 A CN 2010105894021A CN 201010589402 A CN201010589402 A CN 201010589402A CN 102109416 B CN102109416 B CN 102109416B
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China
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loading
circuit
moment
electromagnet
torsion
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CN2010105894021A
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Chinese (zh)
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CN102109416A (en
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刘宏昭
邱荣华
周训通
原大宁
何强
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西安理工大学
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Abstract

The invention discloses a non-contact electromagnetic loading device for a high speed electric spindle, wherein the mechanical part of the device is as follows: an electric spindle is fixed on a supporting seat; a central spindle is sleeved in the inner cavity of the electric spindle; one end of the central spindle is coaxially sleeved with a circular loading disc; a balancing device is arranged at the outer end of the circular loading disc; the circular loading disc is provided with an inclined through hole along the axial direction; an integral bracket is arranged around the circular loading disc; a radial force loading electromagnet is arranged on the lower part of the integral bracket and wrapped with direct current excitation coils (1) and (2); a left torque loading electromagnet and a right torque loading electromagnet are respectively arranged on two sides of the integral bracket; each of the left and right torque loading electromagnets is wrapped with the direct current excitation coils (3) and (4); the electric part of the device comprises a PWM (pulse width modulation) switch power amplifier; the output end of the PWM switch power amplifier is simultaneously connected with a magnetic field controller and the direct current excitation coils (1), (2), (3) and (4) while the input end of the PWM switch power amplifier is orderly connected with a diode rectification circuit and a rectifier transformer; and the magnetic field controller is connected with an industrial control machine. The device provided by the invention solves th difficult loading problem in the performance analysis test of the high speed electric spindle.

Description

A kind of high-speed electric main shaft noncontact electromagnetism charger
Technical field
The invention belongs to the dynamic control device technical field, relate to a kind of high-speed electric main shaft noncontact electromagnetism charger.
Background technology
High-speed electric main shaft has been widely used in processing manufacturing industry as emerging technology, to realize numerically-controlled machine high speed, high-precision processing.Be to improve the machining precision and the reliability of high-speed numeric control lathe, reliability and dynamic property research experiment in the time of need be to the high-speed electric main shaft load running, this test at first will solve the loading problem of high-speed electric main shaft.At present; Less about the loading problem research of high-speed electric main shaft test both at home and abroad; The loading method of carrying still the formula of dragging is loaded for what slowspeed machine adopted in loading; Promptly the dynamometer machine as charger is connected with motor coaxle, to electric machine main shaft load torque is provided, and measures the parameter such as rotating speed, moment of torsion of electric machine main shaft.Because the rotating ratio of common electric machine is lower; Contact loads and can meet the demands, but for high-speed electric main shaft, if adopt contact to load; Can produce a large amount of heat of friction when running up and mechanical wear big, the stable operation when being difficult to realize Loading Control and high-speed electric main shaft load; Simultaneously, also there is the following deficiency in existing high-speed electric main shaft to dragging the formula charger: (1) can only provide the load torque of main shaft to load, and can not provide the radial force of main shaft to load.(2) owing to adopt shaft coupling to connect, the problem that exists mechanical wear, vibration and right alignment accurately not to guarantee, consequent centrifugal force makes high-speed electric main shaft vibration, swing aggravation, so that can't realize loading during high speed.Therefore, the test of high-speed electric main shaft loads and should not load with contact.
Summary of the invention
The purpose of this invention is to provide a kind of high-speed electric main shaft noncontact electromagnetism charger, solved the difficult loading problem of prior art high speed electricity main shaft.
The technical scheme that the present invention adopted is, a kind of high-speed electric main shaft noncontact electromagnetism charger comprises mechanical part and electric part,
Described mechanical part structure is; Worktable is provided with bearing and integral support, is fixed with electric main shaft on the bearing, and the axle center inner chamber of electric main shaft is set with mandrel; The end that mandrel stretches out electric main shaft is coaxially connected with the loading disk, and the outer end that loads disk is provided with balance device; Load disk and be provided with oblique through hole vertically; Described integral support is around loading the disk setting; Load disk and integral support and be positioned at same vertical plane; Integral support bottom under loading disk vertical direction is equipped with radial force and loads electromagnet; It is the U-shaped electromagnet that radial force loads electromagnet, the two ends that radial force loads electromagnet be wound with respectively direct-flow magnet exciting coil 1. with direct-flow magnet exciting coil 2.; Right moment of torsion is installed on the integral support of the horizontal both sides of loading disc axis loads electromagnet and left moment of torsion loading electromagnet; Right moment of torsion loads electromagnet and left moment of torsion loading electromagnet is straight iron core; Be wound with respectively direct-flow magnet exciting coil 3. with direct-flow magnet exciting coil 4., 3. direct-flow magnet exciting coil is same straight line with direct-flow magnet exciting coil coil axis 4. with the straight horizontal radial line that loads disk;
Described electric part structure is, comprises field controller, and heap(ed) capacity test value and heap(ed) capacity setting value are the field controller input signal; The field controller output terminal is connected with the control circuit input end of PWM switch power amplifier, the loaded circuit output terminal of PWM switch power amplifier simultaneously with direct-flow magnet exciting coil 1., 2. with 3., 4. be connected; The input end of PWM switch power amplifier also is connected with rectifier transformer with diode rectifier circuit successively, and field controller also is connected with industrial computer.
The invention has the beneficial effects as follows, solved the problem that high-speed electric main shaft is difficult to load effectively, can provide the load torque of main shaft to load, can provide the radial force of main shaft to load again; Apparatus cost is low, easy to install, reliability is high, remarkable in economical benefits.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention;
Fig. 2 is the side-looking structural drawing of apparatus of the present invention integral support one side;
Fig. 3 is loading disk and the balance device partial enlarged drawing in apparatus of the present invention;
Fig. 4 is that the circuit part of apparatus of the present invention connects synoptic diagram;
Fig. 5 is four groups of solenoid syndeton synoptic diagram in apparatus of the present invention.
Among the figure, 1. electric main shaft 2. loads disk, 3. integral support, 4. tiltedly through hole, 5. counterbalance weight; 6. balancing frame, 7.T type groove, 8. radial force loads electromagnet, 9. rectifier transformer, 10. diode rectifier circuit, 11.PWM switch power amplifier; 12. field controller, 13. worktable, 14. bearings, 15. right moments of torsion load electromagnet, and 16. left moments of torsion load electromagnet; 17. filter capacitor, 18.PWM waveform generator, 19. isolated drive circuits, 20. radial force loaded circuits, 21. moment of torsion loaded circuits; 22. set nut, 23. stripped nuts, 24. flanges, 1., 2., 3. and 4. 25. mandrels are four direct-flow magnet exciting coils.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.
Like Fig. 1, Fig. 2, Fig. 3, the mechanical part structure of apparatus of the present invention is that worktable 13 is provided with bearing 14 and integral support 3; Be fixed with electric main shaft 1 on the bearing 14, the axes sleeve of electric main shaft 1 is equipped with mandrel 25, and the end that mandrel 25 stretches out electric main shaft 1 is coaxially connected with flange 24; Flange 24 is fixedly connected with mandrel 25 through set nut 22; Be set with on the flange 24 and load disk 2, load disk 2 and be positioned at same vertical plane with integral support 3, the outer end that loads disk 2 is provided with balancing frame 6; Be provided with a plurality of counterbalance weights 5 in the T type groove 7 that balancing frame 6 is offered along circumference; The outer end of balancing frame 6 is provided with stripped nut 23, and stripped nut 23 is used for balancing frame 6 is fixed on flange 24, is clamped on the flange 24 thereby will load disk 2.
With reference to Fig. 3, the dynamic poise device that loads disk 2 is, in the annular T type groove 7 of balancing frame 6, three counterbalance weights 5 is set, and carries out the transient equilibrium adjustment through the position of mobile balanced block 5.Load disk 2 and be provided with oblique through hole 4 vertically, when electric main shaft high speed rotating, can form high velocity air, realizes air-cooledly automatically, can satisfy long-time continuous and load needs, need not to increase the cooling device of complicacy.
With reference to Fig. 2, Fig. 5; Integral support 3 is precision machined framed structure; Integral support 3 satisfies the symmetry requirement; Radial force is installed in integral support 3 loads electromagnet 8, left moment of torsion loading electromagnet 16 and right moment of torsion loading electromagnet 15; Be positioned at the radial force that loads disk 2 belows load electromagnet 8 be provided with direct-flow magnet exciting coil 1. with direct-flow magnet exciting coil 2.; Direct-flow magnet exciting coil 1. with direct-flow magnet exciting coil 2. coil axis symmetry and be parallel to the vertical straight radial line that loads disk 2, load disk 2 left and right sides and be provided with right moment of torsion and load electromagnet 15 and load electromagnet 16 with left moment of torsion, right moment of torsion load be wound with respectively on electromagnet 15 and the left moment of torsion loading electromagnet 16 direct-flow magnet exciting coil 3. with direct-flow magnet exciting coil 4.; 3. direct-flow magnet exciting coil is same straight line with direct-flow magnet exciting coil coil axis 4. with the straight horizontal radial line that loads disk 2; 1., 2. and 3., 4. direct-flow magnet exciting coil forms D.C. magnetic field separately respectively, through with load disk 2 mating reactions, produce stable electromagnetism loading force, moment of torsion.
With reference to Fig. 1, Fig. 4; Electrical control division separation structure of the present invention is; Heap(ed) capacity test value e and heap(ed) capacity setting value f are field controller 12 input signals; The departure that input signal e and f form is as the PI control algolithm input quantity of field controller 12; The output signal that regulate to produce through the PI control algolithm connects the control circuit input end of width modulation (PWM) switch power amplifier 11, and the loaded circuit input end of PWM switch power amplifier 11 is connected with rectifier transformer 9 with diode rectifier circuit 10 successively, and the loaded circuit output terminal of PWM switch power amplifier 11 and direct-flow magnet exciting coil are 1., 2. with 3., 4. be connected simultaneously; Direct-flow magnet exciting coil 1., 2. and 3., 4. produce stable DC excitation electric current by PWM switch power amplifier 11 and is accomplished the control of DC excitation electric currents by field controller 12; Field controller 12 is connected with industrial computer as host computer; Industrial computer can generate man-machine interactive interface; With input heap(ed) capacity setting value f and other parameter; Parameters such as the setting value f of this input send field controller 12 to through serial communication, and the heap(ed) capacity detected value that field controller 12 receives sends industrial computer to by serial communication and shows.
With reference to Fig. 4, PWM switch power amplifier 11 is made up of loaded circuit and control circuit two parts.The radial force loaded circuit 20 that circuit structure is consistent and the loaded circuit part of moment of torsion loaded circuit 21 composition PWM switch power amplifiers 11; Wherein, The output connection port of radial force loaded circuit 20 is a end, b end; 1. with after the 2. differential serial connection of direct-flow magnet exciting coil direct-flow magnet exciting coil connects a end, b end; The output connection port of moment of torsion loaded circuit 21 is c end, d end, connects c end, d end after 4. 3. direct-flow magnet exciting coil be connected in series with direct-flow magnet exciting coil; Radial force loaded circuit 20 and moment of torsion loaded circuit 21 are all selected insulated gate bipolar transistor npn npn (IGBT) module of Xi Menkang (SEMIKRON) company for use; Model is SK100GH128T; This model IGBT inside modules constitutes the half-bridge chopper circuit by two igbts (IGBT) and two fast recovery diodes (fly-wheel diode), and this half-bridge chopper circuit is packaged into whole IGBT module, as the loaded circuit of PWM switch power amplifier; Have charging, discharge, three kinds of states of afterflow; Be the three-level pwm switch power amplifier, its output current ripple is very little, satisfies stable loading needs.
The input end of radial force loaded circuit 20 and moment of torsion loaded circuit 21 is connected in parallel with diode rectifier circuit 10 output terminals simultaneously; Diode rectifier circuit 10 output terminals also are parallel with filter capacitor 17; But the interchange undesired signal in the filtering rectification output direct current signal; Diode rectifier circuit 10 is the uncontrollable rectification circuit of three-phase bridge that 6 same model commutation diodes constitute, the commutation diode group bridge that this circuit selects for use the Guangzhou emerging company of hard iron to produce, and model is DSRIM; Diode rectifier circuit 10 input ends are connected with rectifier transformer 9 output terminals, rectifier transformer 9 input termination three-phase main-frequency alternating currents.
IGBT control in radial force loaded circuit 20 and the moment of torsion loaded circuit 21 extremely all is connected with isolated drive circuit 19 output terminals; This isolated drive circuit is realized the isolation between radial force loaded circuit 20, moment of torsion loaded circuit 21 and IGBT module drive circuit by HCPL4504 type high speed photo coupling; The special-purpose integrated chip that drives of the IGBT that driving circuit selects for use Xi Menkang (SEMIKRON) company to produce, model is SKH123/12, isolated drive circuit 19 input ends are connected with PWM waveform generator 18 output terminals; Voltage driven type width modulation (PWM) control integrated circuit that this waveform generator selects for use TIX to produce; Model is TL494, and PWM waveform generator 18 input ends are connected with field controller 12,8 single-chip microcomputers that this controller selects for use atmel corp to produce; Model is AT89S8253, supports online programming; The actual loaded amount that the is input as test value e of field controller 12 and heap(ed) capacity setting value f; Field controller 12 is regulated the back according to the departure of these two input quantities after relatively through the PI control algolithm and is produced control signal and export; This output control signal produces the output of PWM waveform through waveform generator 18; The pwm signal of output is controlled the break-make of IGBT in radial force loaded circuit 20 and the moment of torsion loaded circuit 21 after isolation drive is handled; Produce controllable DC excitation electric current, form required loading force, this partial circuit is formed the control circuit of PWM switch power amplifier 11.
The direct supply of diode rectifier circuit 10 output respectively two joints through radial force loaded circuit 20 and moment of torsion loaded circuit 21 separately with direct-flow magnet exciting coil 1., 2. with 3., 4. be connected; Regulate control DC excitation size of current through PI, accomplish the radially adjusting of electromagnetism loading force F and moment of torsion M.When the power supply of connecting radial force loaded circuit 20 and moment of torsion loaded circuit 21 simultaneously, then produce radial loaded power F and moment of torsion M simultaneously loading on the disk 2, load when realizing radial force and moment of torsion.
With reference to Fig. 2, Fig. 4, Fig. 5; Radial force loads electromagnet 8 and is installed in integral support 3 bottoms that load disk 2 one-sided vertical directions; This electromagnet is the U-shaped electromagnet; 1., 2. its two ends connect direct-flow magnet exciting coil respectively, said direct-flow magnet exciting coil 1., exciting current 2. by a of PWM switch power amplifier 11 radial force loaded circuits 20, b connects the termination provides, in I, formation even air gap magnetic field, II place; I, II place air-gap field are loading generation on the external cylindrical surface that disk 2 contact perpendicular to the outside center of external cylindrical surface Maxwell's electromagnetic force radially with magnetic conduction respectively, and synthesize center radial electromagnetic force f straight down nSimultaneously, owing to load and to produce the additional tangential long-range navigation magnetic force f that makes a concerted effort when disk 2 rotates by direction shown in Fig. 5 t, f tAfter the center of circle translation that loads disk 2, form horizontal radial power f tWith additional torque M 2(M 2=f tD/2); f nAnd f tSynthesize the total radial electromagnetic force F in center that loads disk 2.
With reference to Fig. 2, Fig. 4, Fig. 5; Right moment of torsion loads electromagnet 15 and is installed on the integral support 3 that loads disk 2 horizontal both sides with left moment of torsion loading electromagnet 16; Left side moment of torsion loads electromagnet 16 and is III place, IV place among the figure with right moment of torsion loading electromagnet 15 with the gap location that loads disk 2; These two groups of electromagnet are straight iron core, be wound with respectively direct-flow magnet exciting coil 4. with direct-flow magnet exciting coil 3., its exciting current is provided by c, the d termination of the moment of torsion loaded circuit 21 of PWM switch power amplifier 11; Form even air gap magnetic field at III, IV place, the loading disk 2 of III, IV place air-gap field and rotation interacts and produces long-range navigation magnetic force f a, f b, because f a, f bEquivalent, reverse, so loading formation loading moment of torsion M on the disk 2 1(M 1=f aD/2+f bD/2); Load moment of torsion M 1With additional torque M 2Synthesize total loading moment of torsion M; Simultaneously; III, IV place air-gap field are loading generation on the external cylindrical surface that disk 2 contact perpendicular to the outside horizontal center of external cylindrical surface Maxwell's electromagnetic force radially with magnetic conduction respectively; And two direction horizontal center radially Maxwell's electromagnetic force are equivalent, reverse, and making a concerted effort is zero.
Apparatus of the present invention load preceding preliminary work and comprise, on the one hand, and like Fig. 3; Flange 24 is fixed on the mandrel 25 through set nut 22; Be enclosed within on the flange 24 with balancing frame 6 loading disk 2, fixing by stripped nut 23, this assembly is accomplished transient equilibrium on dynamic balancing machine; And fixing three counterbalance weights 5, the assembly after the balance is snapped fitted on the electric main shaft 1 through mandrel 25; On the other hand, like Fig. 2, adjustment integral support 3 levels and vertical position make radial force load electromagnet 8, right moment of torsion loading electromagnet 15 and left moment of torsion loading electromagnet 16 and load 2 air gaps of disk and are 1mm.
Apparatus of the present invention radial electromagnetic force loading procedure is with reference to Fig. 4, Fig. 5, to connect the converter power supply of electric main shaft 1, and connect the power supply of the radial force loaded circuit 20 of diode rectifier circuit 10, PWM switch power amplifier 11.The radial force loading coil is connected with radial force loaded circuit 20 after 1., 2. connecting by differential mode; According to differential connected mode; Coil 1., 2. the magnetic direction of generation is identical; Form the resultant magnetic field at I, II place air gap, because radial force loads electromagnet 8 and load disk 2 adjustment back symmetry fully is installed, I, II place air gap is even, thickness is identical; Be 1mm, so coil 1., 2. equate in the resultant magnetic field that I, II place air gap form; Because loading disk 2 is the good soft magnetic material of magnetic property; So I, II place air-gap field go up generation perpendicular to the outside center of external cylindrical surface Maxwell's electromagnetic force radially loading disk 2 external cylindrical surfaces (air gap with load the disk surface of contact), and synthesize through disc centre radial electromagnetic force f straight down nSimultaneously, load disk 2 and press the rotation of direction shown in Fig. 5, under I, the air-gap field effect of II place, produce tangential long-range navigation magnetic force, and synthesize horizontal tangential power f t, f tTo the center of circle translation that loads disk 2, form horizontal radial power f tWith additional torque M 2(M 2=f tD/2), f nMove to the center of circle straight up, then f nAnd f tSynthesize radial force F, realize that radial electromagnetic force loads through the center of circle; If, can change the direction of radial force F along circumferentially changing the position that radial force loads electromagnet 8.
Apparatus of the present invention moment of torsion loading procedure is with reference to Fig. 4, Fig. 5, to connect electric main shaft 1 converter power supply, and connect the power supply of the moment of torsion loaded circuit 21 of diode rectifier circuit 10, PWM switch power amplifier 11.Direct-flow magnet exciting coil 3., 4. the serial connection back is connected with moment of torsion loaded circuit 21; Because left moment of torsion loads electromagnet 16 and with respect to loading disk 2 the complete symmetry in adjustment back is installed with right moment of torsion loading electromagnet 15; III, IV place air gap is even, thickness is identical; Be 1mm, so coil 4., 3. equate in the magnetic field that III, IV place air gap form; Load disk 2 and press the high speed rotating of direction shown in Fig. 5; Cutting III, IV place air-gap field; On loading disk 2 external cylindrical surfaces, produce induction current, magnetic field that induction current produces and III, IV place air-gap field interact, and are loading generation tangential long-range navigation magnetic force f on the disk 2 a, f b, according to solenoid 3., 4. magnetic direction and load the sense of rotation of disk 2, can confirm III, tangential, IV place electromagnetic force f a, f bDirection because III, IV place air-gap field are equal, so tangential electromagnetic force f a, f bEqual and opposite in direction, in the opposite direction, acting in conjunction is loading on the disk 2, forms and loads moment of torsion M 1(M 1=f aD/2+f bD/2), realize that moment of torsion loads; Simultaneously; III, IV place air-gap field load disk 2 external cylindrical surfaces (air gap with load the disk surface of contact) at magnetic conduction and go up and produce perpendicular to the outside horizontal center of external cylindrical surface Maxwell's electromagnetic force radially; This two directions center radial electromagnetic force is equivalent, reverse, and making a concerted effort is zero; At this moment, load disk 2 and only receive tangential electromagnetic force effect, form moment of torsion M 1Load.
Progressively regulate the high-speed electric main shaft rotating speed, when main shaft reaches required rotating speed, regulate required radially electromagnetism loading force F and load moment of torsion M size, realize that high-speed electric main shaft noncontact electromagnetism loads through control device.
Apparatus of the present invention control principle is, the Graphics Application programming language generates the Loading Control operation interface on the industrial computer of charger control system, and industrial computer selects for use Taiwan to grind the industrial control computer that magnificent company produces, and model is IPC-610P.Required radial force and moment of torsion loading setting value parameter f are by the man-machine interactive interface input and be sent to field controller 12 input ends, adopt serial communication between industrial computer and the field controller 12, accomplish data and transmit, analyze and demonstration.Heap(ed) capacity test value e feeds back to field controller 12 input ends; And in field controller 12, form deviate; Controller PI regulates algorithm and calculates the output of back generation control signal according to this deviate; The control signal of output produces pwm signal output in PWM waveform generator 18; This output signal is controlled the break-make of IGBT in radial force loaded circuit 20 and the moment of torsion loaded circuit 21 behind isolated drive circuit 19, produce controlled DC excitation electric current, accomplishes the adjusting of radial loaded power F and loading moment of torsion M.
The invention of this device is based on following consideration: (1) adopts contactless loading not have heat of friction and mechanical wear; (2) overcome tradition to dragging the problem that formula loads can only provide moment of torsion to load, the present invention can realize that high-speed electric main shaft radial force and moment of torsion load simultaneously; (3) need not consider the right alignment problem; (4) saved dynamometer machine; (5) magnetic conductive disk has oblique through hole, produces high velocity air during rotation, can dispel the heat to loading disk and electromagnet, has saved cooling system; (6) simple in structure, easy operating.
The invention has the beneficial effects as follows: field controller 12 of the present invention is regulated the exciting current of direct-flow magnet exciting coil through PWM switch power amplifier 11; Be easy to realize that the high-speed electric main shaft noncontact loads; Avoided tradition to dragging the formula charger to be connected with electric main shaft is coaxial; Can't guarantee during high speed rotating that right alignment reaches problems such as causing high vibration thus, so that can't realize loading.The present invention is employed in loading disk 2 end faces and opens oblique through hole 4; Utilize the high velocity air that produces when loading disk 2 high speed rotating; Realize the air-cooled automatically of noncontact electromagnetism charger, can satisfy for a long time, load needs continuously, avoided traditional charger to need the problem of complicated cooling system.Charger among the present invention is simple in structure, and reliability is high, is convenient to install, use, and loads needs when satisfying high-speed electric main shaft test and dynamic analysis fully.

Claims (4)

1. high-speed electric main shaft noncontact electromagnetism charger is characterized in that: comprise mechanical part and electric part,
Described mechanical part structure is; Worktable (13) is provided with bearing (14) and integral support (3); Be fixed with electric main shaft (1) on the bearing (14); The axle center inner chamber of electricity main shaft (1) is set with mandrel (25), and the end that mandrel (25) stretches out electric main shaft (1) is coaxially connected with loading disk (2), and the outer end that loads disk (2) is provided with balance device; Load disk (2) and be provided with oblique through hole (4) vertically; Described integral support (3) is around loading disk (2) setting; Load disk (2) and be positioned at same vertical plane with integral support (3); Integral support (3) bottom under loading disk (2) vertical direction is equipped with radial force and loads electromagnet (8); It is the U-shaped electromagnet that radial force loads electromagnet (8), the two ends of radial force loading electromagnet (8) be wound with respectively direct-flow magnet exciting coil 1. with direct-flow magnet exciting coil 2.; Right moment of torsion is installed on the integral support (3) of loading disk (2) horizontal both sides, axle center loads electromagnet (15) and left moment of torsion loading electromagnet (16); Right moment of torsion loads electromagnet (15) and left moment of torsion loading electromagnet (16) is straight iron core; Be wound with respectively direct-flow magnet exciting coil 3. with direct-flow magnet exciting coil 4., 3. direct-flow magnet exciting coil is same straight line with direct-flow magnet exciting coil coil axis 4. with the straight horizontal radial line that loads disk (2);
Described electric part structure is, comprises field controller (12), and heap(ed) capacity test value and heap(ed) capacity setting value are field controller (12) input signal; Field controller (12) output terminal is connected with the control circuit input end of PWM switch power amplifier (11), the loaded circuit output terminal of PWM switch power amplifier (11) simultaneously with direct-flow magnet exciting coil 1., 2. with 3., 4. be connected; The input end of PWM switch power amplifier (11) also is connected with rectifier transformer (9) with diode rectifier circuit (10) successively, and field controller (12) also is connected with industrial computer.
2. high-speed electric main shaft noncontact electromagnetism charger according to claim 1; It is characterized in that: the structure of said balance device is; Outer end loading disk (2) is provided with balancing frame (6); Balancing frame (6) is offered T type groove (7) along circumference, is provided with three abilities in the T type groove (7) along the counterbalance weight (5) that circumferentially moves.
3. high-speed electric main shaft noncontact electromagnetism charger according to claim 1; It is characterized in that: said PWM switch power amplifier (11) is made up of loaded circuit and control circuit two parts, and the loaded circuit in the PWM switch power amplifier (11) comprises radial force loaded circuit (20) and the moment of torsion loaded circuit (21) that structure is consistent;
The input end of radial force loaded circuit (20) and moment of torsion loaded circuit (21) is connected in parallel with diode rectifier circuit (10) output terminal simultaneously, and diode rectifier circuit (10) output terminal also is parallel with filter capacitor (17); IGBT control in radial force loaded circuit (20) and the moment of torsion loaded circuit (21) extremely all is connected with isolated drive circuit (19) output terminal; Isolated drive circuit (19) input end is connected with PWM waveform generator (18) output terminal, and PWM waveform generator (18) input end is connected with field controller (12).
4. high-speed electric main shaft noncontact electromagnetism charger according to claim 3; It is characterized in that: said radial force loaded circuit (20) and moment of torsion loaded circuit (21) are all selected insulated gate bipolar transistor npn npn IGBT module for use; This IGBT inside modules comprises that two insulated gate bipolar transistor npn npns and two fast recovery diodes constitute the half-bridge chopper circuit, and this half-bridge chopper circuit is packaged into whole IGBT module.
CN2010105894021A 2010-12-15 2010-12-15 Non-contact electromagnetic loading device for high speed electric spindle CN102109416B (en)

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