CN103122931A - Drive and control circuit used in magnetic levitation wind-driven generator - Google Patents
Drive and control circuit used in magnetic levitation wind-driven generator Download PDFInfo
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- CN103122931A CN103122931A CN2011103741098A CN201110374109A CN103122931A CN 103122931 A CN103122931 A CN 103122931A CN 2011103741098 A CN2011103741098 A CN 2011103741098A CN 201110374109 A CN201110374109 A CN 201110374109A CN 103122931 A CN103122931 A CN 103122931A
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Abstract
The invention discloses a drive and control circuit used in a magnetic levitation wind-driven generator. The drive and control circuit comprises a displacement monitoring and conditioning module, a magnetic bearing drive and control module and a communication module, wherein the displacement monitoring and conditioning module also comprises an input signal isolating circuit, one end of the input signal isolating circuit is communicated with an A/D (Analog/Digital) conversion circuit, the other end of the input signal isolating circuit is connected with a magnetic bearing control circuit of the magnetic bearing drive and control module, the magnetic bearing drive and control module also comprises an output signal isolating circuit, and the output signal isolating circuit is arranged between the magnetic bearing control circuit and the D/A conversion circuit. Compared with the prior art, the drive and control circuit has the advantages and beneficial effects of effectively reducing the influence of signal measurement noise, series feedback of a drive loop, load disturbance and the like to a controller, and being more stable in levitation state and lower in power consumption. By adopting the scheme of radial electromagnetic levitation and axial permanent magnet unloading, the drive and control circuit eliminates mechanical friction, greatly reduces the start-up wind speed of a fan, and improves the efficiency of power generation.
Description
Technical field
The present invention relates to magnetic levitation technology, specifically be used for the magnetic bearing Drive Control Technique of vertical axis aerogenerator, adopt the digital signal buffer circuit to realize that radial direction magnetic bearing is stable, the reliable suspension.
Background technique
In wind-power electricity generation, can utilize wind energy is to arrive the wind speed section of shutting down between wind speed at the incision wind speed, reduces start wind speed and cut wind speed, has just increased the utilization of available wind energy; Under identical wind speed, improve output power, just can greatly increase the available wind energy utilization ratio, thereby utilize more fully reproducible clean wind energy, but the contradiction that faces is: when with resistance of start square, start wind speed, when the incision wind speed reduces, again output power also reduced simultaneously.
Adopting magnetic levitation technology is to solve these difficult effective ways.With magnetic bearing replacement mechanical bearing in the past, not only can significantly reduce the friction torque between rotor and bearing, realize " light breeze starting, the breeze wind " of wind-driven generator, enlarge the utilization ratio of wind resource, improve generating efficiency; Can also exempt the high cost of bearing operation and maintenance in the past, reduce the cost of wind-power electricity generation.
The magnetic suspending wind turbine generator of China adopts the permanent magnetism passive bearing in conjunction with the design proposal of rolling bearing more, and the emphasis of research also mainly concentrates on design and the topology layout aspect of Permanent-magnet bearing.But, this design method, Permanent-magnet bearing only plays the unloading effect, and rolling bearing is still born rotor gravity.Just part carrying of magnetic suspension bearing, the mechanical friction in blower fan between rotating part and nonrotational part is not thoroughly eliminated.Only when fan rotor realizes that five degree of freedom suspends fully, could thoroughly eliminate mechanical friction, thereby greatly reduce the startup wind speed of blower fan, improve generating efficiency.Can magnetic levitation bearing system steady running and performance thereof, all depends on control system as rigidity, damping, rotating accuracy and antijamming capability etc.In addition, in operation process, also has the existence of many noises or interference.Therefore, good control system is the key of magnetic suspending wind turbine generator safe and highly efficient operation.Carry out the research work of wind-driven generator magnetic bearing Drive and Control Circuit, have great importance for the generating efficiency that improves magnetic suspension bearing control system performance and wind-driven generator.
Summary of the invention
The object of the present invention is to provide a kind of Drive and Control Circuit for magnetic suspending wind turbine generator, it adopts high-performance digital isolator spare, the series connection of isolation measurement noise, driving signal feed back noise is disturbed effectively, realizes that the stable, reliable of radial direction magnetic bearing suspends.
In order to reach the foregoing invention purpose, the present invention realizes by following technological scheme, and a kind of Drive and Control Circuit for magnetic suspending wind turbine generator comprises displacement detecting and conditioning modular converter, magnetic bearing drive control module, communication module; Displacement detecting comprises eddy current displacement sensor, signal conditioning circuit, A/D change-over circuit with the conditioning modular converter; The magnetic bearing drive control module comprises magnetic bearings control circuit, D/A change-over circuit, magnetic bearing power magnification circuit, its main points are that displacement detecting also comprises the input signal buffer circuit with the conditioning modular converter, one end of input signal buffer circuit is communicated with the A/D change-over circuit, and the magnetic bearing displacement signal inputs to the magnetic bearings control circuit of magnetic bearing drive control module after the A/D conversion is effectively isolated displacement signal by the input signal buffer circuit; The magnetic bearing drive control module also comprises the output signal buffer circuit, the output signal buffer circuit is located between magnetic bearings control circuit and D/A change-over circuit, the drive control signal of magnetic bearings control circuit is changed by D/A through exporting digital buffer circuit, controls the displacement deviator of magnetic bearing.
Displacement detecting and the eddy current displacement sensor and the coaxial installation of magnetic bearing of nursing one's health modular converter, magnetic bearing displacement deviator is through data cable input signal conditioning circuit, displacement signal after conditioning is after the A/D conversion, through the digital Isolation input magnetic bearings control circuit of input signal buffer circuit.
The magnetic bearing power magnification circuit output terminal of magnetic bearing drive control module is connected with the magnetic bearing coil through data cable.The magnetic bearings control circuit comprises magnetic bearing controller DSP, hardware management chip CPLD, magnetic bearing controller gathers the rotor displacement signal, carry out control algorithm and calculate suitable control signal, after output signal buffer circuit and D/A conversion, control the on off state of power device in the magnetic bearing power magnification circuit, regulate the current value that flows through the magnetic bearing coil.
Described input signal buffer circuit comprises magnetic coupling numeral isolating chip, its input termination A/D converter, output termination DSP and CPLD; Displacement signal is through magnetic coupling numeral isolating chip input magnetic bearings control circuit.Input isolation circuit is used for filtering and measures noise interference, improves antijamming capability and the control performance of control circuit.
Described output signal buffer circuit comprises appearance coupling numeral isolating chip, its input termination DSP, and output termination D/A converter, current drive signal exports the magnetic bearing power magnification circuit to through holding the digital isolating chip of coupling.Output isolation circuit prevents large driven current density signal cross-talk controller.
Described communication module comprises PC computer and corresponding communication interface unit, receives control command, and that realizes that magnetic bearing suspends opens/stop operation; At the magnetic bearing suspension stages, upload displacement state information with the state of suspension of monitoring magnetic bearing.
The present invention adopts the magnetic coupling, holds the Drive and Control Circuit that coupling numeral isolation technology is used for magnetic suspending wind turbine generator, has substituted existing photoelectric coupling technology, and compared with prior art, its advantage and beneficial effect are:
(1) adopt the scheme of radially electromagnetic suspension and the axial permanent magnetic unloading of magnetic bearing, eddy current displacement sensor, eliminate mechanical friction, greatly reduce the startup wind speed of blower fan, improve generating efficiency.
(2) adopt magnetic coupling numeral isolation technology, data transfer rate, time sequence precision and transient state common mode inhibition capacity are higher, can effectively reduce the signal measurement noise, and state of suspension is more stable.
(3) hold coupling numeral isolation technology by use, effectively reduce large driven current density loop serial Feedback, load disturbance etc. to the impact of controller, more reliable performance, power consumption is lower.
Description of drawings
The present invention is further illustrated below with reference to drawings and Examples.
Fig. 1 is magnetic bearing Drive and Control Circuit theory diagram of the present invention;
Fig. 2 is the scheme of installation of eddy current displacement sensor in the present embodiment;
Fig. 3 is the present embodiment input channel signal numeral isolation schematic diagram;
Fig. 4 is the present embodiment output channel signal digital isolation schematic diagram;
In figure: magnetic bearing 1, eddy current displacement sensor 2, wind-driven generator 3.
Embodiment
As shown in Figure 1, be magnetic bearing Drive and Control Circuit theory diagram of the present invention.This magnetic bearing Drive and Control Circuit comprises displacement detecting and conditioning module, magnetic bearing drive control module and communication module, and displacement detecting and conditioning module comprise eddy current displacement sensor, signal conditioning circuit, A/D change-over circuit and input signal buffer circuit.The magnetic bearing drive control module comprises magnetic bearings control circuit, output signal buffer circuit, D/A change-over circuit, magnetic bearing power magnification circuit.Communication module comprises PC computer and corresponding communication interface unit.The magnetic bearing displacement signal after the A/D conversion, is inputted magnetic bearings control circuit by the input signal buffer circuit through the displacement signal after the signal conditioning circuit conditioning; Drive control signal realizes stable suspersion through exporting digital buffer circuit by the displacement deviator of D/A conversion and control magnetic bearing.The magnetic bearing Drive and Control Circuit consists of the closed loop control to the magnetic bearing coil current of flowing through.
As shown in Figure 2, the mounting point schematic diagram for eddy current displacement sensor on wind-driven generator is equipped with on wind-driven generator 3 and comprises upper and lower two magnetic bearings 1 and upper and lower two eddy current displacement sensors 2.Eddy current displacement sensor 2 and the coaxial installation of magnetic bearing 1, eddy current displacement sensor 2 is used for the position information of Real-Time Monitoring magnetic bearing.Adopt the scheme of radially electromagnetic suspension and the axial permanent magnetic unloading of magnetic bearing, eddy current displacement sensor, eliminate mechanical friction, greatly reduce the startup wind speed of blower fan, improve generating efficiency.
With reference to Fig. 1,2,3,4, the magnetic bearings control circuit of magnetic bearing drive control module comprises magnetic bearing controller DSP, hardware management chip CPLD, DSP selects the TMS320VC33 chip of TI, be responsible for operation control algorithm software and with the communication of upper-position unit, CPLD selects the EPM7128AETC100 chip, is in charge of the function such as Peripheral Interface and the control of A/D sampling interface on plate.D/A converter is selected 13 high-precision MAX547 chips, and power magnification circuit adopts the analog amplifier circuit of four-way, and the linearity is good, is easy to realize.
Magnetic bearing controller DSP is according to the rotor displacement signal that collects, carry out control algorithm, calculate suitable control signal, through the output signal buffer circuit, isolation control signal and driving signal prevent from driving loop heavy current signal series connection and disturb control loop, improve control performance, after the D/A conversion, control the on off state of power device in the magnetic bearing power magnification circuit, and then regulate the current value that flows through the magnetic bearing coil.
The A/D converter of displacement detecting and conditioning module adopts the MAX115 chip of 8 Channel 12-Bits, eddy current displacement sensor 2 (seeing Fig. 2) inputs to signal conditioning circuit by data cable, through inputing to magnetic bearing controller through the input signal buffer circuit after signal gain coupling and filtering.
The magnetic bearing displacement signal noise interference measured by sensor 2 is very serious, can't directly input to subsequent process circuit and use.In the present embodiment, displacement signal adopts the ADuM140x series high-performance numeral isolating chip of ADI company after the A/D EOC, its input termination A/D converter, output termination magnetic bearing controller DSP and CPLD; Displacement signal is through magnetic coupling numeral isolating chip input magnetic bearings control circuit.The quantity of magnetic coupling numeral isolating chip used is relevant with the signalling channel number of its isolation, it adopts the flat magnetic field isolation technology to realize isolation, compares with the existing photo coupler that generally uses, and level of integration is high, its printing board PCB area reducing 60%, power-dissipation-reduced 98%; The external circuit of demand motive LED, not low in energy consumption; Have higher data transfer rate, time sequence precision and transient state common mode inhibition capacity.Magnetic coupling numeral isolating chip can be realized the isolation (seeing Fig. 3) of sensor displacement measurement signal and control inputs signal, is conducive to reduce noise interference, improves antijamming capability and the control performance of control circuit.
Because the magnetic bearing coil is strong inductive load, reach upper and lower radial direction magnetic bearing coil coupling between X, Y-direction coil more serious, the large current signal of flowing through easily is subjected to load effect and comprises various Resonance Wave Compositions, and the disturbance control circuit of very easily connecting affects Systems balanth.The novel product ISO7420 high-performance numeral isolating chip that this example selects TI company to release is realized PWM drive control signal and the effective isolation (seeing Fig. 4) that drives between signal, the antijamming capability of raising system.The quantity of ISO7420 numeral isolating chip used is relevant with the signalling channel number of its isolation, it adopts and holds the coupling isolation technology, its input termination magnetic bearing controller DSP, output termination D/A converter, drive control signal exports the magnetic bearing power magnification circuit to through ISO7420.The appearance coupling numeral isolating chip of output isolation circuit prevents large driven current density signal cross-talk controller.
Communication module adopts the RS422 communication modes, receives the PC control instruction, and that realizes that magnetic bearing suspends opens/stop operation; At the magnetic bearing suspension stages, upload displacement state information with the state of suspension of monitoring magnetic bearing.
In sum, magnetic bearing Drive and Control Circuit of the present invention adopts the magnetic coupling, holds coupling numeral isolation technology and the scheme of electromagnetic suspension and axial permanent magnetic unloading radially, eliminates mechanical friction, greatly reduces the startup wind speed of blower fan, improves generating efficiency.Adopt the magnetic coupling, hold coupling numeral isolation technology, can effectively reduce the signal measurement noise, drive loop serial Feedback, load disturbance etc. to the impact of controller, state of suspension is more stable, and power consumption is lower.
Obviously, those skilled in the art can carry out various changes and distortion and not break away from the spirit and scope of the present invention the present invention.Like this, if within these modifications and distortion belong to the scope of claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and distortion interior.
Claims (4)
1. Drive and Control Circuit that is used for magnetic suspending wind turbine generator, comprise displacement detecting and conditioning module, magnetic bearing drive control module, communication module, displacement detecting and conditioning module comprise eddy current displacement sensor, signal conditioning circuit, A/D change-over circuit, the magnetic bearing drive control module comprises magnetic bearings control circuit, D/A change-over circuit, magnetic bearing power magnification circuit, it is characterized in that:
Displacement detecting and conditioning module also comprise the input signal buffer circuit, one end of input signal buffer circuit is communicated with the A/D change-over circuit, and the magnetic bearing displacement signal inputs to the magnetic bearings control circuit of magnetic bearing drive control module after the A/D conversion is effectively isolated displacement signal by the input signal buffer circuit;
The magnetic bearing drive control module also comprises the output signal buffer circuit, the output signal buffer circuit is located between magnetic bearings control circuit and D/A change-over circuit, the drive control signal of magnetic bearings control circuit is changed by D/A through exporting digital buffer circuit, controls the displacement deviator of magnetic bearing.
2. the Drive and Control Circuit of magnetic suspending wind turbine generator according to claim 1, it is characterized in that: described input signal buffer circuit comprises magnetic coupling numeral isolating chip, its input termination A/D converter, magnetic bearing controller DSP and the CPLD of output termination magnetic bearings control circuit; Displacement signal is through magnetic coupling numeral isolating chip input magnetic bearings control circuit.
3. the Drive and Control Circuit of magnetic suspending wind turbine generator according to claim 1, it is characterized in that: described output signal buffer circuit comprises appearance coupling numeral isolating chip, current drive signal is through holding coupling numeral isolating chip, the magnetic bearing controller DSP of its input termination magnetic bearings control circuit, output termination D/A converter, drive control signal exports the magnetic bearing power magnification circuit to.
According to claim 1 to 3 described magnetic suspending wind turbine generator Drive and Control Circuit, it is characterized in that: described communication module comprises PC computer and corresponding communication interface unit, receives control command.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103741098A CN103122931A (en) | 2011-11-21 | 2011-11-21 | Drive and control circuit used in magnetic levitation wind-driven generator |
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| CN2011103741098A CN103122931A (en) | 2011-11-21 | 2011-11-21 | Drive and control circuit used in magnetic levitation wind-driven generator |
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| CN103122931A true CN103122931A (en) | 2013-05-29 |
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| CN2011103741098A Pending CN103122931A (en) | 2011-11-21 | 2011-11-21 | Drive and control circuit used in magnetic levitation wind-driven generator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698869A (en) * | 2016-03-22 | 2016-06-22 | 河北工业大学 | Magnetic-levitation-principle-based wind direction and wind speed measuring device |
| CN106849952B (en) * | 2017-04-10 | 2018-01-02 | 北京航空航天大学 | A kind of magnetic suspension bearing displacement signal nurses one's health system and method certainly |
| CN108061655A (en) * | 2017-12-29 | 2018-05-22 | 南京磁谷科技有限公司 | A kind of automatically controlled system of independent magnetic suspension bearing and its control method |
| CN108377055A (en) * | 2018-03-30 | 2018-08-07 | 苏州容浦机电科技有限公司 | A kind of novel magnetically levitated switch reluctance servo motor |
| CN116055244A (en) * | 2022-12-12 | 2023-05-02 | 北京航天测控技术有限公司 | Multi-bus configurable integrated communication device and working method thereof |
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| JPH07208471A (en) * | 1994-01-21 | 1995-08-11 | Ebara Corp | Control device for magnetic bearing |
| JPH11210673A (en) * | 1998-01-28 | 1999-08-03 | Koyo Seiko Co Ltd | Magnetic levitation rotating device |
| US6472787B1 (en) * | 1999-07-29 | 2002-10-29 | Koyo Seiko Co., Ltd. | Controller of magnetic bearing |
| JP2003083330A (en) * | 2001-09-12 | 2003-03-19 | Koyo Seiko Co Ltd | Magnetic bearing device |
| CN1585259A (en) * | 2004-06-10 | 2005-02-23 | 武汉理工大学 | DPS based intellectual high speed magnetic suspension control and analog power amplifying device |
| CN1776550A (en) * | 2005-01-27 | 2006-05-24 | 山东大学 | Magnetic suspension bearing monitoring-controlling integrating device |
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| JPH07208471A (en) * | 1994-01-21 | 1995-08-11 | Ebara Corp | Control device for magnetic bearing |
| JPH11210673A (en) * | 1998-01-28 | 1999-08-03 | Koyo Seiko Co Ltd | Magnetic levitation rotating device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698869A (en) * | 2016-03-22 | 2016-06-22 | 河北工业大学 | Magnetic-levitation-principle-based wind direction and wind speed measuring device |
| CN105698869B (en) * | 2016-03-22 | 2017-09-29 | 河北工业大学 | A kind of wind direction and wind velocity measurement apparatus based on magnetic suspension principle |
| CN106849952B (en) * | 2017-04-10 | 2018-01-02 | 北京航空航天大学 | A kind of magnetic suspension bearing displacement signal nurses one's health system and method certainly |
| CN108061655A (en) * | 2017-12-29 | 2018-05-22 | 南京磁谷科技有限公司 | A kind of automatically controlled system of independent magnetic suspension bearing and its control method |
| CN108377055A (en) * | 2018-03-30 | 2018-08-07 | 苏州容浦机电科技有限公司 | A kind of novel magnetically levitated switch reluctance servo motor |
| CN116055244A (en) * | 2022-12-12 | 2023-05-02 | 北京航天测控技术有限公司 | Multi-bus configurable integrated communication device and working method thereof |
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