CN104803306B - A kind of tower crane slew gear eddy current brake systems - Google Patents
A kind of tower crane slew gear eddy current brake systems Download PDFInfo
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- CN104803306B CN104803306B CN201510250704.9A CN201510250704A CN104803306B CN 104803306 B CN104803306 B CN 104803306B CN 201510250704 A CN201510250704 A CN 201510250704A CN 104803306 B CN104803306 B CN 104803306B
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- eddy current
- input
- control unit
- circuit
- pwm
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/84—Slewing gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/22—Control systems or devices for electric drives
- B66C13/30—Circuits for braking, traversing, or slewing motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C2700/00—Cranes
- B66C2700/08—Electrical assemblies or electrical control devices for cranes, winches, capstans or electrical hoists
- B66C2700/082—Control of the secondary movements, e.g. travelling, slewing, luffing of the jib, changing of the range
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Control Of Ac Motors In General (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
This application discloses a kind of tower crane slew gear eddy current brake systems, including: input AC source, it is connected to the controlled rectification circuit between described input AC source and eddy current coil, the control unit being connected with the master controller of tower crane, the input sampling circuit that exchanges being connected between described control unit with described input AC source, and the controlled rectification drive circuit being connected between described control unit and described controlled rectification circuit；Wherein, described controlled rectification drive circuit drives described controlled rectification circuit for the PWM issued according to described control unit；Described control unit is used for the speed of gyration gear given according to described master controller and the AC-input voltage size of described exchange input sampling circuit sampling and phase place, calculate described PWM, with impact during buffering tower crane gearshift, and reach more preferably to run and braking effect.
Description
Technical field
The present invention relates to tower crane slew gear eddy current motor and control technical field, more particularly, it relates to one
Plant tower crane slew gear eddy current brake systems.
Background technology
Tower crane is crane gear conventional on construction site, and owing to tower arm is longer, tower crane slew gear has
Bigger inertia, is shifting gears (including accelerating and running slowly) and is stopping, especially unexpected at high tap position
During parking, tower crane fuselage rocks quite severe, and tower arm also can rebound back and forth and produce the impact to steel construction,
Tower crane slew gear can be caused certain infringement by this impact.
Traditional scheme can only be when stopping to the eddy current coil (electromagnetism of the eddy current motor of tower crane slew gear
Brake) provide eddy-current brake voltage (being properly termed as eddy current voltage or eddy current output voltage) to brake whirlpool
Stream motor, and described eddy-current brake voltage is selected by a limited number of tap of transformator, because of
This stop time be unable to reach optimal braking effect, affected by inertia impact during gearshift be also unable to reach flat
Steady operational effect.
Summary of the invention
In view of this, the present invention provides a kind of tower crane slew gear eddy current brake systems, returns buffering tower crane
Impact during rotation mechanism gear shift, and reach more preferably to run and braking effect.
A kind of tower crane slew gear eddy current brake systems, including:
Input AC source, be connected between described input AC source and the eddy current coil of eddy current motor is controlled
Rectification circuit, the control unit being connected with the master controller of tower crane, it is connected to described control unit and institute
State the exchange input sampling circuit between input AC source, and be connected to described control unit with described can
Controlled rectification drive circuit between control rectifying circuit；
Wherein, described controlled rectification drive circuit drives for the PWM issued according to described control unit
Described controlled rectification circuit；
Described control unit is for the speed of gyration gear given according to described master controller and described friendship
The AC-input voltage size of stream input sampling circuit sampling and phase place, calculate described PWM.
Alternatively, described system also includes the input equipment being connected with described control unit；Described control is single
Described PWM is finely adjusted by the tuning parameter that unit is additionally operable to according to described input equipment is given.
Wherein, described control unit includes: obtain for obtaining the analog quantity of described AC-input voltage size
Take unit, for obtaining the phase place acquiring unit of described AC-input voltage phase place, for obtaining described returning
The digital quantity acquiring unit of rotary speed gear, for obtain the input of described tuning parameter set acquiring unit,
For exporting the PWM output unit of described PWM, and input side obtains single respectively with described analog quantity
Phase place acquiring unit first, described, described digital quantity acquiring unit and described input set acquiring unit be connected,
The PWM computing unit that outlet side is connected with described PWM output unit.
A kind of tower crane slew gear eddy current brake systems, including:
Input AC source, be connected between described input AC source and the eddy current coil of eddy current motor is controlled
Rectification circuit, the control unit being connected with the master controller of tower crane, it is connected to described controlled rectification circuit
Outlet side and described control unit between eddy current output sample circuit, and be connected to described control single
Controlled rectification drive circuit between first and described controlled rectification circuit；
Wherein, described controlled rectification drive circuit drives for the PWM issued according to described control unit
Described controlled rectification circuit；
Described control unit is for the speed of gyration gear given according to described master controller and described whirlpool
The eddy current output voltage size of stream output sampling circuit samples and phase place, calculate described PWM.
Alternatively, described system also includes the input equipment being connected with described control unit；Described control is single
Described PWM is finely adjusted by the tuning parameter that unit is additionally operable to according to described input equipment is given.
Wherein, described control unit includes: obtain for obtaining the analog quantity of described eddy current output voltage size
Take unit, for obtaining the phase place acquiring unit of described eddy current output voltage phase place, for obtaining described returning
The digital quantity acquiring unit of rotary speed gear, for obtain the input of described tuning parameter set acquiring unit,
For exporting the PWM output unit of described PWM, and input side obtains single respectively with described analog quantity
Phase place acquiring unit first, described, described digital quantity acquiring unit and described input set acquiring unit be connected,
The PWM computing unit that outlet side is connected with described PWM output unit.
Wherein, described controlled rectification circuit is half-controlled rectifier circuit.
Wherein, described control unit is the control circuit of described converter, and described converter is used for driving institute
State eddy current motor.
Wherein, described control unit includes the first controller and second controller；Described first controller is
The control circuit of described converter；Between described first controller and described second controller, mutual communication is even
Connect.
Alternatively, described tower crane slew gear eddy current brake systems also includes: be connected to described controlled rectification
Normally closed switch between outlet side and the eddy current coil of described eddy current motor of circuit, and it is connected to described
The ON-OFF control circuit controlled between end and described control unit of normally closed switch.
From above-mentioned technical scheme it can be seen that the present invention passes through when gearshift for different speeds of gyration
Gear, provides different eddy-current brake voltage to eddy current coil, to buffer when tower crane slew gear is shifted gears
Impact, thus reached more preferably operational effect；Meanwhile, the present invention is controlled whole by controlling when stopping
The stepless continuous that the angle of flow of current circuit achieves described eddy-current brake voltage is adjustable, thus has reached more preferably
Braking effect.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of tower crane slew gear eddy current brake systems structural representation disclosed in the embodiment of the present invention；
Fig. 2 is the embodiment of the present invention another tower crane slew gear eddy current brake systems structural representation disclosed
Figure；
Fig. 3 is the control unit structural representation in system shown in Figure 2；
Fig. 4 is AC-input voltage corresponding to system shown in Figure 2 and eddy current output voltage waveform；
Fig. 5 is the embodiment of the present invention another tower crane slew gear eddy current brake systems structural representation disclosed
Figure；
Fig. 6 is the embodiment of the present invention another tower crane slew gear eddy current brake systems structural representation disclosed
Figure；
Fig. 7 is the control unit structural representation in system shown in Figure 6；
Fig. 8 is the embodiment of the present invention another tower crane slew gear eddy current brake systems structural representation disclosed
Figure；
Fig. 9 is the embodiment of the present invention another tower crane slew gear eddy current brake systems structural representation disclosed
Figure.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
See Fig. 1, the embodiment of the invention discloses a kind of tower crane slew gear eddy current brake systems, with buffering
Impact during tower crane gear shift, and reach more preferably to run and braking effect, including:
Input AC source 100, be connected between input AC source 100 and the eddy current coil of eddy current motor can
Control rectifying circuit 200, the control unit 300 being connected with the master controller of tower crane, it is connected to control unit
Exchange input sampling circuit 400 between 300 with input AC source 100, and be connected to control unit 300
And the controlled rectification drive circuit 500 between controlled rectification circuit 200；
Wherein, controlled rectification drive circuit 500 drives for the PWM issued according to control unit 300
Controlled rectification circuit 200；
Control unit 300 is for the speed of gyration gear given according to described master controller and exchanges defeated
Enter AC-input voltage size and the phase place of sample circuit 400 sampling, calculate described PWM.Fig. 1 gets the bid
The direction of arrow illustrated represents the signal in system and flows to.
Master controller is the stick of a manual operation, speed of gyration during tower crane slew gear action
Gear is all given by master controller.When tower crane is in gearshift, and especially downshift or high tap position stops suddenly
Che Shi, tower crane slew gear can produce bigger impact, and for solving this problem, the present embodiment utilizes and controls
Unit 300 calculates according to current speed of gyration gear, current AC-input voltage size and phase place
PWM, controlled rectification drive circuit 500 drives controlled rectification circuit 200 according to the PWM received,
Make controlled rectification circuit 200 export corresponding eddy-current brake voltage to eddy current coil, thus reach for not
Same speed of gyration gear applies the purpose of different eddy-current brake power to eddy current motor, is hung in tempering tower
During gearshift, impact when especially downshift or high tap position stop suddenly, add tower crane slew gear and run
Stationarity.
Further, traditional scheme is to select eddy-current brake voltage by a limited number of tap of transformator, and
The present embodiment, when stopping, (can be calculated by the thyristor operating angle of regulation controlled rectification circuit 200
Go out described PWM and the most just calculated thyristor operating angle) realize the continuous stepless of eddy-current brake voltage
Adjustable, thus can reach more preferably braking effect.
Additionally, on the basis of Fig. 1, present embodiment discloses another tower crane turn-around machine being more highly preferred to
Structure eddy current brake systems, as in figure 2 it is shown, it also includes the input equipment 600 being connected with control unit 300,
Such as keyboard or touch screen etc.；Control unit 300 is additionally operable to the debugging ginseng given according to input equipment 600
Several described PWM is finely adjusted.
The preferable of scheme shown in Fig. 2 is embodied in, tower crane fuselage stationarity when can shift gears in conjunction with reality,
Setting PWM tuning parameter by input equipment 600, control unit 300 gives according to input equipment 600
The tuning parameter PWM to currently calculating carry out fine tune, thus according to the stationarity of reality gearshift
The most slightly increase and decrease current eddy current output voltage, to adapt to the complicated and changeable of field working conditions, reach optimal
Operational effect.Described tuning parameter can be the eddy current electricity combining current working desired output when gearshift
Pressure, such as during entering shelves, sets eddy current voltage as 15VDC during neutral, one, two, three, fourth gear
Do not provide eddy current voltage or for ensureing that accelerating stability provides certain eddy current voltage；During downshift,
Fourth gear does not provide eddy current voltage, and third gear provides 5VDC eddy current voltage, and two grades provide 8VDC eddy current voltage,
One grade provides 12VDC eddy current voltage, and neutral provides 15VDC eddy current voltage, and these electrical voltage points can basis
The stationarity of gearshift (acceleration and deceleration) adjusts accordingly.
Wherein, control unit 300 is calculated the process of PWM and is: by the friendship of controlled rectification circuit 200
The stream input voltage SIN function angle of flow is integrated equal to output mean voltage, further according to current friendship
Stream input voltage phase can obtain thyristor operating angle, and this has the most just calculated PWM, wherein said friendship
Stream input voltage is that the AC-input voltage size sampled according to exchange input sampling circuit 400 is counted
Calculating gained, described output mean voltage is according to master controller and the given number of input equipment 600
According to carrying out calculating gained.Corresponding, seeing Fig. 3, control unit 300 includes: be used for obtaining described exchange
The analog quantity acquiring unit 301 of input voltage size, for obtaining the phase place of described AC-input voltage phase place
Acquiring unit 302, for obtaining the digital quantity acquiring unit 303 of described speed of gyration gear, for obtaining
The input of described tuning parameter sets acquiring unit 304, for exporting the PWM output list of described PWM
Unit 305, and input side respectively with analog quantity acquiring unit 301, phase place acquiring unit 302, digital quantity
Acquiring unit 303 set with input acquiring unit 304 be connected, outlet side and PWM output unit 305
The PWM computing unit 306 being connected.The AC-input voltage finally given is with eddy current output voltage waveforms such as
Shown in Fig. 4.
By foregoing description it can be seen that the present embodiment gearshift time for different speed of gyration gears, give
Eddy current coil provides different eddy-current brake voltage, to buffer impact during tower crane gearshift, adds tower crane
Slew gear traveling comfort, and the tower crane fuselage when present invention can also shift gears according to reality is steady
Described eddy-current brake voltage is finely adjusted, to adapt to the complicated and changeable of field working conditions, thus further by property
Optimize the operational effect of tower crane slew gear；Meanwhile, the present invention stop time by control controlled rectification
The stepless continuous that the angle of flow of circuit achieves described eddy-current brake voltage is adjustable, thus has reached more preferably
Braking effect.
Above example is to control controlled rectification circuit 200 by the mode of open loop, in addition can also be by closed loop
Mode controls controlled rectification circuit 200, thus obtains the eddy-current brake voltage needed.Concrete, see
Fig. 5, described tower crane slew gear eddy current brake systems, including:
Input AC source 100, is connected to the controlled rectification circuit between input AC source 100 and eddy current coil
200, the control unit 300 being connected with the master controller of tower crane, it is connected to controlled rectification circuit 200
Eddy current output sample circuit 400 between outlet side and control unit 300, and it is connected to control unit
Controlled rectification drive circuit 500 between 300 and controlled rectification circuit 200；
Wherein, controlled rectification drive circuit 500 drives for the PWM issued according to control unit 300
Controlled rectification circuit 200；
Control unit 300 is defeated for the speed of gyration gear given according to described master controller and eddy current
Go out eddy current voltage size and the phase place of sample circuit 400 sampling, calculate described PWM.
Compared to above example, it is that in place of the difference of the present embodiment, utilizes eddy current output sampling electricity
Road 400 carries out closed loop control for control unit 300 provides feedback signal, for opened loop control,
The result of closed loop output is the most accurate.
Same, on the basis of Fig. 5, the present embodiment discloses another tower crane turn-around machine being more highly preferred to
Structure eddy current brake systems, as shown in Figure 6, it also includes the input equipment 600 being connected with control unit 300,
Such as keyboard or touch screen etc.；Control unit 300 is additionally operable to the debugging ginseng given according to input equipment 600
Several described PWM is finely adjusted.Its operation principle and preferable the relevant of scheme with reference to shown in Fig. 2 thereof are retouched
Stating, here is omitted.
Wherein, seeing Fig. 7, control unit 300 includes: for obtaining described eddy current output voltage size
Analog quantity acquiring unit 31, for obtain described eddy current output voltage phase place phase place acquiring unit 32, use
In obtaining the digital quantity acquiring unit 33 of described speed of gyration gear, for obtaining the defeated of described tuning parameter
Enter to set acquiring unit 34, for exporting the PWM output unit 35 of described PWM, and input side
Set with analog quantity acquiring unit 31, phase place acquiring unit 32, digital quantity acquiring unit 33 and input respectively
Determine the PWM computing unit 36 that acquiring unit 34 is connected, outlet side is connected with PWM output unit 35.
Wherein, for any one tower crane slew gear eddy current brake systems disclosed above, controlled rectification electricity
Road 200 can use all controlled rectifier circuit, it is possible to uses half-controlled rectifier circuit, for cost-effective, this enforcement
Example is using half-controlled rectifier circuit as preferably.Described half-controlled rectifier circuit can use controllable silicon halfwave rectifier topology.
Wherein, for any one tower crane slew gear eddy current brake systems disclosed above, controlled rectification drives
Galvanic electricity road 500 can use light-coupled isolation, transformer isolation or the topological structure of relay isolation, not
Limitation.
Wherein, for any one tower crane slew gear eddy current brake systems disclosed above, controlled rectification is worked as
When circuit 200 uses controllable silicon halfwave rectifier topology, alternating current input power supplying 100 can be electrical network (such as
Biphase 380VAC or single-phase 220VAC), it is also possible to it is the electricity after line voltage passes through transformer pressure-reducing
Source (such as 27VAC or 15VAC).
Wherein, for any one tower crane slew gear eddy current brake systems disclosed above, may also include that
The outut device being connected with control unit 300, for showing the inputoutput data of control unit 300,
Such as the given tuning parameter etc. of input equipment 600.Wherein, input equipment 600 and described outut device can
Think Same Physical unit (such as touch screen), it is also possible to be that two self-existent physical locations are (as solely
The vertical keyboard existed and display).
Wherein, for any one tower crane slew gear eddy current brake systems disclosed above, control unit 300
And/or input equipment 600 can be structure belonging to converter, such as control unit 300 is the control of converter
Circuit processed or panel, input equipment 600 is the operation keyboard of converter, and described converter is used for driving
Eddy current motor, provides driving voltage to eddy current motor.Tied by existing hardware in directly utilizing converter
Structure, is integrated in the control of converter by the function of control unit 300 in tower crane slew gear eddy current brake systems
In making sheet, the function of input equipment 600 is integrated in the operation keyboard of converter, is greatly saved hard
Part cost.
It is of course also possible to by the portion of the control unit 300 in described tower crane slew gear eddy current brake systems
Point function is integrated in the panel of described converter, and another part function is integrated in another one independence
In controller, mutually communication connects between the two.Such as, seeing Fig. 8, control unit 300 includes first
Controller 3001 and second controller 3002, wherein: the first controller 3001 is the control electricity of converter
Road, is connected with master controller and input equipment 600 respectively；Second controller 3002 is defeated with eddy current respectively
Go out sample circuit 400 to be connected with controlled rectification drive circuit 500.Fig. 8 is for obtaining based on scheme shown in Fig. 6
The expansion scheme arrived, the scheme shown in Fig. 1, Fig. 2 or Fig. 5 that certainly may be based on expands, its principle phase
With, repeat no more.
As preferably, for any one tower crane slew gear eddy current brake systems disclosed above, see Fig. 9,
Described tower crane slew gear eddy current brake systems, may also include that and be connected to the defeated of controlled rectification circuit 200
Go out the normally closed switch KM1 between the eddy current coil of side and described eddy current motor, and be connected to normally closed switch
The ON-OFF control circuit 700 controlled between end and control unit 300 of KM1.Control unit 300 is logical
Cross ON-OFF control circuit 700 control KM1 disconnect time, without eddy current voltage output.Wherein, normally closed switch
KM1 can be normally closed contactor or normally closed relay.Fig. 9 is the expansion obtained based on scheme shown in Fig. 6
Scheme, the scheme shown in Fig. 1, Fig. 2, Fig. 5 or Fig. 8 that certainly may be based on expands, and its principle is identical,
Repeat no more.Wherein, when carrying out de-exhibition based on scheme shown in Fig. 8, ON-OFF control circuit 700 can be with
Second controller 3002 is connected, but does not limit to.
In system shown in Figure 9, when controlled rectification circuit 200 uses half-controlled rectifier circuit, can use can
Control silicon halfwave rectifier topology, it is possible to use controllable silicon to add diode all wave rectification topology.When using controllable silicon
During halfwave rectifier topology, alternating current input power supplying 100 can be electrical network (the most biphase 380VAC or single-phase
220VAC), it is also possible to be power supply after line voltage passes through transformer pressure-reducing (such as 27VAC or
24VAC), eddy current voltage output can be turned off by disconnecting KM1, it is possible to directly control controlled rectification electricity
The thyristor operating angle on road 200 be zero to turn off eddy current voltage output.Complete when using controllable silicon to add diode
During ripple rectification topology, alternating current input power supplying 100 line voltage can only be selected to pass through transformer pressure-reducing after electricity
Source (such as 27VAC or 24VAC), and eddy current voltage output can only be turned off by disconnecting KM1.
In sum, the present invention passes through when gearshift for different speed of gyration gears, to eddy current coil
(eddy current coil passes through continuous current circuit afterflow, and described continuous current circuit belongs to provide different eddy-current brake voltage
Eddy current motor internal structure, not shown in figure), to buffer impact during tower crane gearshift, thus reach
More preferably operational effect；Meanwhile, the present invention is real by controlling the angle of flow of controlled rectification circuit when stopping
The stepless continuous having showed described eddy-current brake voltage is adjustable, thus has reached more preferably braking effect.
In this specification, each embodiment uses the mode gone forward one by one to describe, and each embodiment stresses
Being the difference with other embodiments, between each embodiment, identical similar portion sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses
The present invention.Multiple amendment to these embodiments will be aobvious and easy for those skilled in the art
Seeing, generic principles defined herein can be in the spirit or scope without departing from the embodiment of the present invention
In the case of, realize in other embodiments.Therefore, the embodiment of the present invention is not intended to be limited to institute herein
These embodiments shown, and it is to fit to consistent with principles disclosed herein and features of novelty the widest
Scope.
Claims (10)
1. a tower crane slew gear eddy current brake systems, it is characterised in that including:
Input AC source, be connected between described input AC source and the eddy current coil of eddy current motor is controlled
Rectification circuit, the control unit being connected with the master controller of tower crane, it is connected to described control unit and institute
State the exchange input sampling circuit between input AC source, and be connected to described control unit with described can
Controlled rectification drive circuit between control rectifying circuit；
Wherein, described controlled rectification drive circuit drives for the PWM issued according to described control unit
Described controlled rectification circuit；
Described control unit is for the speed of gyration gear given according to described master controller and described friendship
The AC-input voltage size of stream input sampling circuit sampling and phase place, calculate described PWM.
System the most according to claim 1, it is characterised in that described system also includes and described control
The input equipment that unit processed is connected；Described control unit is additionally operable to the debugging given according to described input equipment
Described PWM is finely adjusted by parameter.
System the most according to claim 2, it is characterised in that described control unit includes: be used for
Obtain the analog quantity acquiring unit of described AC-input voltage size, for obtaining described AC-input voltage
The phase place acquiring unit of phase place, for obtaining the digital quantity acquiring unit of described speed of gyration gear, being used for
The input obtaining described tuning parameter sets acquiring unit, for exporting the PWM output list of described PWM
Unit, and input side respectively with described analog quantity acquiring unit, described phase place acquiring unit, described numeral
Acquiring unit is connected amount acquiring unit, outlet side is connected with described PWM output unit with described input setting
PWM computing unit.
4. a tower crane slew gear eddy current brake systems, it is characterised in that including:
Input AC source, be connected between described input AC source and the eddy current coil of eddy current motor is controlled
Rectification circuit, the control unit being connected with the master controller of tower crane, it is connected to described controlled rectification circuit
Outlet side and described control unit between eddy current output sample circuit, and be connected to described control single
Controlled rectification drive circuit between first and described controlled rectification circuit；
Wherein, described controlled rectification drive circuit drives for the PWM issued according to described control unit
Described controlled rectification circuit；
Described control unit is for the speed of gyration gear given according to described master controller and described whirlpool
The eddy current output voltage size of stream output sampling circuit samples and phase place, calculate described PWM.
System the most according to claim 4, it is characterised in that described system also includes and described control
The input equipment that unit processed is connected；Described control unit is additionally operable to the debugging given according to described input equipment
Described PWM is finely adjusted by parameter.
System the most according to claim 5, it is characterised in that described control unit includes: be used for
Obtain the analog quantity acquiring unit of described eddy current output voltage size, for obtaining described eddy current output voltage
The phase place acquiring unit of phase place, for obtaining the digital quantity acquiring unit of described speed of gyration gear, being used for
The input obtaining described tuning parameter sets acquiring unit, for exporting the PWM output list of described PWM
Unit, and input side respectively with described analog quantity acquiring unit, described phase place acquiring unit, described numeral
Acquiring unit is connected amount acquiring unit, outlet side is connected with described PWM output unit with described input setting
PWM computing unit.
7. according to the system described in claim 1 or 4, it is characterised in that described controlled rectification circuit is
Half-controlled rectifier circuit.
8. according to the system described in claim 1 or 4, it is characterised in that described control unit is frequency conversion
The control circuit of device, described converter is used for driving described eddy current motor.
System the most according to claim 8, it is characterised in that described control unit includes the first control
Device processed and second controller；
Wherein, described first controller is the control circuit of described converter；Described first controller and institute
State mutual communication between second controller to connect.
10. according to the system described in claim 1 or 4, it is characterised in that described tower crane slew gear
Eddy current brake systems also includes: be connected to the outlet side of described controlled rectification circuit and described eddy current motor
Normally closed switch between eddy current coil, and the control end being connected to described normally closed switch is single with described control
ON-OFF control circuit between unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510250704.9A CN104803306B (en) | 2015-05-15 | 2015-05-15 | A kind of tower crane slew gear eddy current brake systems |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510250704.9A CN104803306B (en) | 2015-05-15 | 2015-05-15 | A kind of tower crane slew gear eddy current brake systems |
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| CN104803306A CN104803306A (en) | 2015-07-29 |
| CN104803306B true CN104803306B (en) | 2017-01-04 |
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| CN103693560B (en) * | 2013-12-13 | 2015-10-14 | 中联重科股份有限公司 | Tower crane and control method, device and system of slewing mechanism of tower crane |
| CN104528559B (en) * | 2015-01-05 | 2017-04-26 | 深圳市英威腾电气股份有限公司 | Tower crane system and tower crane rotation vortex flow controller |
| CN104555764B (en) * | 2015-01-05 | 2017-08-29 | 深圳市英威腾电气股份有限公司 | Rotary braking system and tower crane control system |
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2015
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