CN101388640A - Pressure and speed regulating system for semi-digital AC stator - Google Patents
Pressure and speed regulating system for semi-digital AC stator Download PDFInfo
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- CN101388640A CN101388640A CNA2008100404705A CN200810040470A CN101388640A CN 101388640 A CN101388640 A CN 101388640A CN A2008100404705 A CNA2008100404705 A CN A2008100404705A CN 200810040470 A CN200810040470 A CN 200810040470A CN 101388640 A CN101388640 A CN 101388640A
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Abstract
The invention relates to a semi-digitalization direct current stator variable voltage speed control system, which comprises a main controller, a speed setting device, a power module, a current transformation device, a motor, a reel and a processor which is used to adjust parameters, wherein the process is used to adjust the parameters, receives a plurality of input signals which pass through analog to digital conversion, and outputs the signals after comparison processing adjustment, the system also comprises a D/A conversion module which is connected with an output end of the process, is used to convert a part of digital signals which are output by the processer into analog control signals, and outputs the analog control signals to the main controller, wherein the main controller controls the motor to operate according to the analog control signals. The system of the invention realizes parameter arrangement and adjustment through increasing the processer and has the advantages of high adjusting precision, stable working performance and strong anti-interference ability. The system only needs to input parameters of an original device into a new device in in-situ device replacement. The maintenance quantity is reduced and the safe production has more reliable guarantee. The electronic over-speed and hook gliding preventing protection is increased, and the system safety is increased.
Description
Technical field
The invention belongs to crane AC stator variable voltage control technical field.
Background technology
At present, the speed regulating method of AC asynchronous motor that crane adopts mainly contains three kinds: change number of pole-pairs p speed governing, change revolutional slip S speed governing and change frequency f
1Speed governing.Change revolutional slip S speed governing and mainly be divided into two kinds: a kind of is rotor loop crosstalk resistance, and another kind is a stator voltage controlling.Frequency control mainly changes the frequency of motor stator voltage, and practical application at present is at most a stator variable voltage speed control.Its control mode is divided into two kinds of analog quantity control mode and digital quantity control modes.Existing stator variable voltage speed control normally adopts analog quantity control, and each parameter exists and regulates inconvenience, big, the use for a long time under the bigger situation of crane vibration of error all with the potentiometer adjusting, and the potentiometer parameter changes easily.And light-emitting diode is adopted in the display part, and existence shows intuitively, search fast at the scene of being not easy to and the shortcoming of handling failure.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide a kind of pressure and speed regulating system for semi-digital AC stator.
The present invention adopts following technical scheme:
A kind of pressure and speed regulating system for semi-digital AC stator comprises master controller, velocity setting device, power model, current converter, motor, reel, it is characterized in that also comprising:
Be used for the processor of parameter regulation, be used for parameter regulation, receive, judge back output through comparison process through analog-to-digital a plurality of input signals;
The D/A modular converter is connected with the output of described processor, is used for described processor output digital signal is converted to analog control signal and exports master controller to, and described master controller is according to this analog control signal control motor rotation.
Further, also comprise the speed detector that is connected between described processor and the motor, be used to detect motor speed and feed back to described processor.
Further, also comprise the driver module that is connected with processor and button, the display that is connected with described driver module.
Further, be provided with predetermined failure code in the described processor, described processor carries out fault judgement according to input signal, and the output failure code is to display.
Further, described driver module is MAX7219, and described controller is the ATMEGA162 chip, and described display comprises 7 sections charactrons of four.
Further, described external interface circuit comprises the amplifier that is connected between described D/A modular converter chip and the described master controller, and described analog control signal is imported described master controller after operational amplifier is adjusted to the required level of described master controller.
Further, also comprise the amplifying circuit, voltage to frequency converter, the optocoupler that connect successively, the output of described optocoupler is connected with described processor.
Further, the analog switch that also comprises the band isolation that is connected between described processor and the master controller.
Further; be provided with the anti-hook protection module that slips in the described processor; be connected with brake apparatus between the anti-slide hook protection module of described processor and the reel, described anti-slide hook protection module is with velocity setting signal and the current of electric feedback signal operation condition as brake apparatus:
Only when velocity setting signal and current of electric feedback signal existed simultaneously, brake apparatus was opened;
Do not have the current of electric feedback signal as the velocity setting signal, brake apparatus is failure to actuate.
Further, be provided with motor overspeed protection module in the described processor, be provided with a threshold value greater than normal motor speed maximum rated value in the described motor overspeed protection module,, output control signals to described master controller when motor speed during greater than this threshold value.
The present invention has the following advantages:
1, compared with prior art, prior art relies on potentiometer to regulate analog quantity parameter, and not only deviation is big, and each data all needs debugging to determine, as current limit, zero-speed adjusting etc.The scene more behind the changing device each parameter need debugging again, bring very big inconvenience to operation and maintenance, and the potentiometer discreteness is big, long-play is easy to generate drift, the service behaviour instability.The present invention realizes the setting and the adjusting of parameter by increasing processor, has the degree of regulation height, stable work in work, the advantage that antijamming capability is strong.And when field device is changed, only need getting final product in the original device parameter input new equipment.Reduced maintenance, made safety in production that more reliable guarantee arranged.
2, the fault of prior art shows the employing diode displaying, and not directly perceived, the fault difficulty is searched at the scene, wastes time and energy.The present invention adopts failure code directly to show the fault point, and is not only directly perceived, and significantly reduced maintenance, improved production efficiency.
3, existing analog controlling device does not have the overspeed protection function, and its overspeed protection is that the mechanical centrifugal switch that is mounted on the motor spindle nose is protected, at the bottom of the control precision, and poor stability.The present invention has increased the electrical overspeed protection newly, makes the many one-levels of overspeed protection, has increased the fail safe of system.
4, prior art is because design defect prevents slipping hook protection.The present invention has increased anti-slide hook safeguard measure newly, makes crane work safety and reliability.
Description of drawings
Fig. 1 is a pressure and speed regulating system for semi-digital AC stator example structure schematic diagram of the present invention.
Embodiment
As shown in Figure 1, a kind of pressure and speed regulating system for semi-digital AC stator comprises:
Master controller,
The velocity setting device is connected with described master controller, is used to receive the control signal of described master controller, and this signal is converted into the signal of power controlling module;
Power model is connected with described velocity setting device, is used for the signal control motor operation according to described velocity setting device input;
Current converter is connected with induction coil on the lead of described master controller and described power model output, for described master controller provides feedback signal;
Motor is used to drive reel and rotates;
Reel,
Above-mentioned master controller, velocity setting device, power model, current converter, motor, reel are prior art, omit the description of its concrete control and implementation procedure at this.Improvement part comprises:
Be used for the processor of parameter regulation, be used for parameter regulation, receive, judge back output through comparison process through analog-to-digital a plurality of input signals; For example when set point and actual value were inconsistent, processor was regulated the parameter actual value according to the error of set point and actual value, makes the given scope of its ERROR CONTROL.
The D/A modular converter is connected with the output of described processor, is used for described processor output digital signal is converted to analog control signal and exports master controller to, and described master controller is according to this analog control signal control motor rotation.Further, also can comprise an operational amplifier (not shown), described analog control signal is imported described master controller after operational amplifier is adjusted to the needed level of described master controller;
Wherein, also comprise the driver module that is connected with processor and button, the display that is connected with described driver module.Be provided with predetermined failure code in the described processor, described processor carries out fault judgement according to input signal, and exports failure code to the display demonstration.Can in time understand failure cause like this, make the troubleshooting simple and fast, easy to maintenance, help the normal operation of equipment.Wherein, driver module can adopt MAX7219, and described controller can adopt ATMEGA162 chip and external interface circuit to form.This single-chip microcomputer built-in function is very powerful, the collection data acquisition circuit, clock circuit shows and keyboard circuit, need not to add the EPROM device, the comparison circuit that external interface circuit adopts A/D converter, D/A converter, operational amplifier to form reaches the input signal of gathering by optocoupler.Described display comprises 7 sections charactrons of four, to show failure code.Described processor, driver module and display can place on the same circuit board, and it has compact conformation, advantage that reliability is high.
Wherein, also comprise the speed detector that is connected between described processor and the motor, be used to detect motor speed and feed back to described processor.
In the present embodiment, a plurality of input signals that described processor receives comprise switching value importation S01～S19 and shows signal part S20～S25.
Wherein, switching value importation S01～S19 is specific as follows:
S01 is provided with direction A;
S02 is provided with direction B;
S03 actual direction A, direction detects;
S04 actual direction B, direction detects;
S05～S08 is a limit signal, corresponding respectively spacing A, spacing B, stops spacing A, stops spacing B;
The prompting of S09 band-type brake;
The S10 stop signal;
The S11 zero signal;
The S13 restriction that overloads;
S14～S16 is the gear instruction, corresponding respectively fixed 2 gears of beginning, fixed 3 gears of beginning, fixed 4 gears of beginning;
S17, S18 are the rotor resistance signal, respectively respective rotor resistance 1, rotor resistance 2;
S19 zero-speed signal, this signal correspondence be when stopping, when speed is reduced to brake sticking brake, produce during the motor speed set point of correspondence, this signal is a prior art.
Wherein, command signal S01, S02, S14, S15, S16 are produced by the peripheral operation instruction.External status when all the other signals all move by the detection motor produces.Above-mentioned switching value importation S01～S19 is input in the processor through light-coupled isolation.Processor is stored the Signal Processing result, and according to signal processing results output control signal and need the signal that in display, show.
Wherein, shows signal part S20～S25 is specific as follows:
S20 velocity setting signal;
S21 current of electric feedback signal a;
S22 current of electric feedback signal b;
The S23 motor speed;
S24 control board positive supply;
S25 control board negative supply.
Wherein, also comprise the amplifying circuit, voltage to frequency converter, the optocoupler that connect successively, the output of described optocoupler is connected with described processor.Signal S21, S22 are the current detection signals that is produced by described master controller, and S23 is then to be the feedback signal of being exported by described speed detector.Signal S20～S25 converts pulse signal by be amplified to the scope that needs through amplifying circuit after to through voltage/frequency (V/F) transducer, again by after the light-coupled isolation, and input processor.Be transformed into digital quantity signal by the processor pulse signals then, export driver module to, export 7 sections charactrons to by driver module and show.Wherein, the V/F transducer can adopt AD654.
C01～C08 is analog signal output, and is specific as follows:
C01 forward potential amplitude limit is set;
C02 reverse potential amplitude limit is set;
The C03 zero-speed is regulated and is set;
The C04 adjusted in concert;
The C05 rotor resistance switches 2 to be set;
The C06 differential is set;
C07 slip value protection is set;
C08 slip value time set.
Processor produces the control signal of output digital quantity according to input signal and button operation signal processing results, output signal by light-coupled isolation after, send into D/A converter and produce simulation output control signal, be adjusted to the needed level of master controller by the operational amplifier (not shown) again, by the direct governing speed of master controller.Wherein can to adopt transducer be MCP42050 to D/A.
C11～C19 is the switching value output signal, and is specific as follows:
C11 slope time set;
C12 band-type brake time set;
C14 speed regulator gain setting;
C15 speed regulator integral feedback time set;
The supersynchronous setting of C16;
The coarse adjustment of C17 motor rated speed;
The fine tuning of C18 motor rated speed;
C19 motor rated current is regulated.
Described processor is according to signal processing results, produce digital quantity output control signal, isolate back output switching value control signal to master controller by the analog switch (can adopt TLP598G) that band is isolated, carry out signal processing again by master controller then, directly control rotating speed.
Wherein, be provided with the anti-hook protection module that slips in the described processor, be connected with brake apparatus between the anti-slide hook protection module of described processor and the reel, described brake apparatus receives the control signal A02 of described processor output with brake drum.In former simulation pressure-speed regulating device, by the design gaps and omissions, the not anti-hook safeguard measure of slipping, this has produced a series of potential safety hazard.The present invention has increased anti-slide hook protective device newly.Described anti-slide hook protection module is used to export the action of control signal A02 with the control brake device.Described brake apparatus can be band-type brake relay and band-type brake, and described band-type brake relay is controlled opening and obvolvent of band-type brake.
Described anti-slide hook protection module is with velocity setting signal S20 and the current of electric feedback signal S21 condition as the band-type brake actuating of relay.Only at velocity setting signal S20 and current of electric feedback signal S21 (being the motor speed feedback signal) when existing simultaneously, the adhesive of band-type brake control relay, band-type brake is opened.When not having current of electric feedback signal S21 as velocity setting signal S19, illustrate that motor does not have torque, band-type brake is failure to actuate.When there not being velocity setting signal S20 but when having current of electric feedback signal S21, illustrate that motor begins reduction of speed, and when detecting S19 zero-speed signal, the band-type brake control relay is opened, the band-type brake obvolvent.
Wherein, be provided with motor overspeed protection module in the described processor.In order to prevent to exceed the speed limit when hanging thing descends, crane is typically provided with the overspeed protection function.Traditional control method is in the motor termination or the deceleration pusher side installs centrifugal switch additional, when motor stall, and the centrifugal switch action, device stops, and band-type brake discharges, and the accident that prevents takes place.But because the crane vibrations are bigger, the centrifugal switch misoperation often takes place, influence the normal operation of equipment.Motor overspeed protection module among the present invention is used to export control signal A01 to master controller, carries out overspeed protection by master controller according to this signal.Its course of work is as follows:
When hanging thing decline, rate signal is input to motor speed signal S23 in the motor overspeed protection module of described controller by speed detector, is provided with a threshold value greater than normal motor speed maximum rated value in the described motor overspeed protection module.As this threshold value is 120%～140% of maximum rated value, when the value of motor speed signal S23 during greater than this threshold value, and output control signal A01, described master controller carries out overspeed protection according to this signal.
Claims (10)
1, a kind of pressure and speed regulating system for semi-digital AC stator comprises master controller, velocity setting device, power model, current converter, motor, reel, it is characterized in that also comprising:
Be used for the processor of parameter regulation, be used for parameter regulation, receive, judge back output through comparison process through analog-to-digital a plurality of input signals;
The D/A modular converter is connected with the output of described processor, is used for described processor output digital signal is converted to analog control signal and exports master controller to, and described master controller is according to this analog control signal control motor rotation.
2, pressure and speed regulating system for semi-digital AC stator according to claim 1 is characterized in that: also comprise the speed detector that is connected between described processor and the motor, be used to detect motor speed and feed back to described processor.
3, pressure and speed regulating system for semi-digital AC stator according to claim 1 is characterized in that: also comprise the driver module that is connected with processor and button, the display that is connected with described driver module.
4, pressure and speed regulating system for semi-digital AC stator according to claim 3 is characterized in that: be provided with predetermined failure code in the described processor, described processor carries out fault judgement according to input signal, and the output failure code is to display.
5, pressure and speed regulating system for semi-digital AC stator according to claim 3 is characterized in that: described driver module is MAX7219, and described controller is the ATMEGA162 chip, and described display comprises 7 sections charactrons of four.
6, pressure and speed regulating system for semi-digital AC stator according to claim 4, it is characterized in that: described external interface circuit comprises the amplifier that is connected between described D/A modular converter chip and the described master controller, and described analog control signal is imported described master controller after operational amplifier is adjusted to the required level of described master controller.
7, pressure and speed regulating system for semi-digital AC stator according to claim 1 is characterized in that: also comprise the amplifying circuit, voltage to frequency converter, the optocoupler that connect successively, the output of described optocoupler is connected with described processor.
8, pressure and speed regulating system for semi-digital AC stator according to claim 1 is characterized in that: the analog switch that also comprises the band isolation that is connected between described processor and the master controller.
9, pressure and speed regulating system for semi-digital AC stator according to claim 2; it is characterized in that: be provided with the anti-hook protection module that slips in the described processor; be connected with brake apparatus between the anti-slide hook protection module of described processor and the reel, described anti-slide hook protection module is with velocity setting signal and the current of electric feedback signal operation condition as brake apparatus:
Only when velocity setting signal and current of electric feedback signal existed simultaneously, brake apparatus was opened; Do not have the current of electric feedback signal as the velocity setting signal, brake apparatus is failure to actuate.
10, pressure and speed regulating system for semi-digital AC stator according to claim 2; it is characterized in that: be provided with motor overspeed protection module in the described processor; be provided with a threshold value greater than normal motor speed maximum rated value in the described motor overspeed protection module; when motor speed during, output control signals to described master controller greater than this threshold value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100404705A CN101388640A (en) | 2008-07-11 | 2008-07-11 | Pressure and speed regulating system for semi-digital AC stator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100404705A CN101388640A (en) | 2008-07-11 | 2008-07-11 | Pressure and speed regulating system for semi-digital AC stator |
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| CN101388640A true CN101388640A (en) | 2009-03-18 |
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| CNA2008100404705A Pending CN101388640A (en) | 2008-07-11 | 2008-07-11 | Pressure and speed regulating system for semi-digital AC stator |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102035405A (en) * | 2011-01-04 | 2011-04-27 | 北京航空航天大学 | Intelligent adjustable ground starting power supply of aero-engine |
| CN102043753A (en) * | 2009-10-15 | 2011-05-04 | 横河电机株式会社 | Device information setting apparatus and device information setting method |
| CN102185555A (en) * | 2010-12-28 | 2011-09-14 | 上海智大电子有限公司 | Digitalized alternating-current voltage and speed regulation device |
| CN102818579A (en) * | 2012-07-20 | 2012-12-12 | 北京控制工程研究所 | Method for determining accuracy of angle measurement signal emitted by rotary transformer |
| CN103359633A (en) * | 2013-07-23 | 2013-10-23 | 中联重科股份有限公司 | Tower crane and raising control method, raising control equipment and raising control system of tower crane |
| CN103580654A (en) * | 2013-10-18 | 2014-02-12 | 中国核动力研究设计院 | Reactor period signal generator, implementation method thereof and use method thereof |
| CN105897109A (en) * | 2016-06-16 | 2016-08-24 | 大连科信起重电器有限公司 | Alternating-current voltage-regulating speed-regulating apparatus |
| CN106647491A (en) * | 2016-12-19 | 2017-05-10 | 天津市品通电力科技有限公司 | Prime mover speed regulation device motherboard based on digital signal processor |
| CN108599670A (en) * | 2018-05-07 | 2018-09-28 | 孟晓丽 | Speed regulation control method for special frequency converter for heavy-load motor |
| CN110611465A (en) * | 2019-09-11 | 2019-12-24 | 上海智大电子有限公司 | Main control board of voltage and speed regulating system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102043753A (en) * | 2009-10-15 | 2011-05-04 | 横河电机株式会社 | Device information setting apparatus and device information setting method |
| CN102185555A (en) * | 2010-12-28 | 2011-09-14 | 上海智大电子有限公司 | Digitalized alternating-current voltage and speed regulation device |
| CN102185555B (en) * | 2010-12-28 | 2013-05-08 | 上海智大电子有限公司 | Digitalized alternating-current voltage and speed regulation device |
| CN102035405A (en) * | 2011-01-04 | 2011-04-27 | 北京航空航天大学 | Intelligent adjustable ground starting power supply of aero-engine |
| CN102818579B (en) * | 2012-07-20 | 2015-10-21 | 北京控制工程研究所 | A kind of rotary transformer angle measuring-signal accuracy determination methods |
| CN102818579A (en) * | 2012-07-20 | 2012-12-12 | 北京控制工程研究所 | Method for determining accuracy of angle measurement signal emitted by rotary transformer |
| CN103359633A (en) * | 2013-07-23 | 2013-10-23 | 中联重科股份有限公司 | Tower crane and raising control method, raising control equipment and raising control system of tower crane |
| CN103359633B (en) * | 2013-07-23 | 2015-08-12 | 中联重科股份有限公司 | Tower machine and lift control method, apparatus and system thereof |
| CN103580654A (en) * | 2013-10-18 | 2014-02-12 | 中国核动力研究设计院 | Reactor period signal generator, implementation method thereof and use method thereof |
| CN103580654B (en) * | 2013-10-18 | 2016-08-17 | 中国核动力研究设计院 | Reactor period signal generator and its implementation and using method |
| CN105897109A (en) * | 2016-06-16 | 2016-08-24 | 大连科信起重电器有限公司 | Alternating-current voltage-regulating speed-regulating apparatus |
| CN106647491A (en) * | 2016-12-19 | 2017-05-10 | 天津市品通电力科技有限公司 | Prime mover speed regulation device motherboard based on digital signal processor |
| CN108599670A (en) * | 2018-05-07 | 2018-09-28 | 孟晓丽 | Speed regulation control method for special frequency converter for heavy-load motor |
| CN110611465A (en) * | 2019-09-11 | 2019-12-24 | 上海智大电子有限公司 | Main control board of voltage and speed regulating system |
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