CN206705540U - A kind of crane control system and crane - Google Patents
A kind of crane control system and crane Download PDFInfo
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- CN206705540U CN206705540U CN201720439163.9U CN201720439163U CN206705540U CN 206705540 U CN206705540 U CN 206705540U CN 201720439163 U CN201720439163 U CN 201720439163U CN 206705540 U CN206705540 U CN 206705540U
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- crane
- feed device
- back feed
- energy
- energy back
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Abstract
The utility model embodiment provides a kind of crane control system and crane, and the system includes：Power network, energy back feed device and frequency converter, the frequency converter are used for the motor for driving crane, and described energy back feed device one end is connected with the three-phase alternating current bus of the power network, and the other end is connected with the dc bus of at least two frequency converters.The crane includes above-mentioned control system, and the motor of the crane is connected with the frequency converter of the control system.Crane control system provided by the utility model, power network and multiple frequency converters are connected by energy back feed device, realize the two-way flow of crane electric energy, it ensure that the service life of frequency converter, the energy is saved, an energy back feed device can connect multiple frequency converters simultaneously, reduce the use cost of energy feedback unit.
Description
Technical field
The utility model embodiment is related to hoisting machinery technical field, and in particular to a kind of crane control system and lifting
Machine.
Background technology
When hoisting machinery works, motor obtains electric energy from power supply grid, and motor converts electrical energy into mechanical energy, real
The carrying of existing target object.But when the electronic goods gravity drive lifted of hoisting machinery or inertia braking are slowed down
When, motor can be in generating state, need to reasonably dispose this partial regeneration energy.
In the prior art, handled more by the way of external brake unit or braking resistor caused by hoisting machinery again
Raw electric energy.Its advantage is that motor will not generate heat, and is adapted to the operating mode of frequent operation, ensure that performance and the life-span of frequency converter, is lacked
Point is the waste that dynamic braking causes energy, and is limited to it and suppresses the promptness of pumping voltage caused by speed braking.
Therefore, a kind of scheme how is proposed, crane frequency converter performance can ensured and on the premise of the life-span, saved
The about energy, turn into technical problem urgently to be resolved hurrily.
Utility model content
For in the prior art the defects of, the utility model embodiment provides a kind of crane control system and crane.
On the one hand, the utility model provides a kind of crane control system, including：Power network, energy back feed device and change
Frequency device, the frequency converter are used for the motor for driving crane, and described energy back feed device one end is intersected with the three of the power network
Bus connection is flowed, the other end is connected with the dc bus of at least two frequency converters.
Further, the energy back feed device includes lifting special converter MD050 and control panel CN8.
Further, the DC master row of the energy back feed device is connected with the busbar terminal of the frequency converter.
Further, the voltage of the DC master row of the energy back feed device is 610VDC.
Further, filter reactance, filter capacitor, buffering are connected between the power network and the energy back feed device to connect
Tentaculum and buffer resistance.
Further, the buffer resistance is connected in parallel with the snubber contact device.
On the other hand, a kind of crane of the utility model embodiment offer, including above-mentioned crane control system, described
The motor of heavy-duty machine is connected with the frequency converter of the control system.
Crane control system and crane provided by the utility model, therein, energy back feed device has abandoned parallel connection
Braking resistor consumes the mode of the renewable sources of energy, and an energy back feed device drives the frequency converter of multiple structures to run simultaneously,
The power of energy back feed device is more than the general power that three mechanisms are run simultaneously, in guarantee crane frequency converter performance and before the life-span
Put, saved the energy and cost.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are
Some embodiments of the utility model, for those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of ditching machine operation quality monitoring system in the utility model embodiment；
Fig. 2 is the principle schematic of energy back feed device in the utility model embodiment；
Fig. 3 is the principle schematic of crane control system energy feedback in the utility model；
Fig. 4 is arrangement schematic diagram in the cabinet of the utility model energy back feed device.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, rather than whole embodiments.Based on the implementation in the utility model
Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, is belonged to
The scope of the utility model protection.
Fig. 1 is the structural representation of ditching machine operation quality monitoring system in the utility model embodiment, as shown in figure 1,
Crane control system provided by the utility model includes：Power network 01, energy back feed device 02 and frequency converter 03, the frequency converter
For driving the motor of crane, described energy back feed device one end is connected with the three-phase alternating current bus of the power network, another
End is connected with the dc bus of at least two frequency converters.
Specifically, as shown in figure 1, one end of energy back feed device 02 connects power network 01 in the utility model embodiment, separately
One end is connected with 3 frequency converters 03, can also connect 1,2 or more frequency converters as needed certainly.Energy feedback fills
2 are set to 0 to be used for the AC rectification of power network 01 into direct current to drive frequency converter 03, it is progressive that crane is driven by frequency converter 03
Motor is operated.When crane motor in the presence of external force such as：Lifting during the grab bucket of crane declines
When the motor of machine generates electricity, energy back feed device 02 can also by the DC inverter of frequency converter 03 into alternating current be fed back to electricity
Net 01, the recovery of energy is realized, saved the energy, while protect the frequency converter of crane.
Crane control system provided by the utility model, energy back feed device have abandoned braking resistor consumption regeneration in parallel
The mode of the energy, and an energy back feed device drives the frequency converter of multiple structures to run simultaneously, the work(of energy back feed device
Rate is more than the general power that three mechanisms are run simultaneously.Ensure crane frequency converter performance and on the premise of the life-span, save the energy.
On the basis of above-described embodiment, the energy back feed device includes lifting special converter MD050 and control panel
CN8。
Specifically, the energy back feed device that the utility model embodiment uses include lifting special converter MD050 and
Control panel CN8, Fig. 2 are the principle schematic of energy back feed device in the utility model embodiment, as shown in Fig. 2 this practicality is new
What energy back feed device was selected is model MD050 lifting special converter and control panel CN8 in type embodiment, wherein
MD050 includes multiple IGBT (Insulated Gate Bipolar Transistor) insulated gate bipolar transistor, and IGBT is
The compound full-control type voltage driven type power being made up of BJT (double pole triode) and MOS (insulating gate type field effect tube) is partly led
Body device.Energy back feed device one end of MD050 and control panel CN8 compositions is connected with power network, the frequency converter of one end and crane
Connection.As shown in Fig. 2 Q1~Q6 in MD050 principle schematic is IGBT, and when not worked by controlling IGBT, MD050 phases
When in a common fairing, converting alternating current to the work of DC powered frequency converter；When motor produces the renewable sources of energy
When, by controlling IGBTQ1-Q6 break-makes according to certain rules, DC bus-bar voltage can be reverse into phase and amplitude and power supply electricity
Identical alternating current is pressed, is fed back to power network, namely what is often called energy feedback.
Fig. 3 is the principle schematic of crane control system energy feedback in the utility model, as shown in figure 3, energy returns
Feedback device includes MD050 and control panel CN8, and energy back feed device and one end and power network are that the 380VAC in Fig. 3 is connected, one end
It is that D2 bus groups in Fig. 3 are connected with frequency converter.The busbar end of the DC master row of the energy back feed device and the frequency converter
Son connection, the voltage of the DC master row of the energy back feed device is 610VDC.As seen from Figure 3, energy back feed device with
One end of power network connection includes input port U/V/W and detects port R/S/T, and input port U/V/W is used for the exchange of power network
Electricity input is to the energy back feed device, and input to transducer drive frequency converter, frequency converter drives after energy back feed device rectification
The motor of dynamic crane is operated.Simultaneously input port U/V/W be also used for the direct current of crane hair through frequency converter and
The alternating current that energy back feed device is reverse into is fed back to the power network, realizes the feedback of energy, has saved the energy, protects frequency conversion
Device, extend the life-span of frequency converter.Detection port R/S/T only uses as detection phase sequence, especially by CN8 parameter configurations.
Fig. 4 be the utility model energy back feed device cabinet in arrangement schematic diagram, as shown in figure 4, the power network with it is described
Be connected with filter reactance, filter capacitor, snubber contact device and buffer resistance between energy back feed device, the buffer resistance with
The snubber contact device is connected in parallel.
Specifically, the mode of connection of power network and energy back feed device can connect the preceding filter in filter reactance i.e. Fig. 4 for power network
Ripple reactance, filter capacitor is post filtering electric capacity in Fig. 4, then connects snubber contact device, and simultaneous buffering resistance is in parallel with contactor, afterwards
Connect energy back feed device.As shown in figure 4, PFC (Power Factor can also be connected between power network and energy back feed device
Correction) energy storage reactance, other equipment can also be connected as needed certainly, to ensure stabilization of voltage etc..
Crane control system provided by the utility model, motor four-quadrant is moved, improve making for the energy
With efficiency, the two-way flow of electric energy is realized.Reactive power is compensate for simultaneously, power factor is improved, optimizes power network electric energy
Quality, reduce the influence of harmonic wave.Because the control DC master row voltage that can stablize, improve the dynamic response of system.Through
The test at scene is crossed, energy-saving efficiency can reach 30% or so.Simultaneously.Because energy back feed device provided by the utility model can
Multiple mechanism frequency converters are driven, the price for having evaded energy back feed device in financial cost is high the shortcomings that, are saved well
Cost.
On the basis of above-described embodiment, the utility model additionally provides a kind of crane, including above-mentioned crane control
System, the motor of the crane are connected with the frequency converter of the control system, can be realized by crane control system
The reasonable utilization of crane energy.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacement；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the utility model technology
The spirit and scope of scheme.
Claims (7)
- A kind of 1. crane control system, it is characterised in that including：Power network, energy back feed device and frequency converter, the frequency conversion Device is used for the motor for driving crane, and described energy back feed device one end is connected with the three-phase alternating current bus of the power network, separately One end is connected with the dc bus of at least two frequency converters.
- 2. system according to claim 1, it is characterised in that the energy back feed device includes lifting special converter MD050 and control panel CN8.
- 3. system according to claim 1, it is characterised in that the DC master row of the energy back feed device and the frequency conversion The busbar terminal connection of device.
- 4. system according to claim 2, it is characterised in that the voltage of the DC master row of the energy back feed device is 610VDC。
- 5. system according to claim 1, it is characterised in that be connected between the power network and the energy back feed device Filter reactance, filter capacitor, snubber contact device and buffer resistance.
- 6. system according to claim 5, it is characterised in that the buffer resistance is in parallel with the snubber contact device even Connect.
- 7. a kind of crane, it is characterised in that including the crane control system described in above-mentioned any one of 1-6, the crane Motor be connected with the frequency converter of the control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720439163.9U CN206705540U (en) | 2017-04-24 | 2017-04-24 | A kind of crane control system and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720439163.9U CN206705540U (en) | 2017-04-24 | 2017-04-24 | A kind of crane control system and crane |
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| Publication Number | Publication Date |
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| CN206705540U true CN206705540U (en) | 2017-12-05 |
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| CN201720439163.9U Active CN206705540U (en) | 2017-04-24 | 2017-04-24 | A kind of crane control system and crane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109533198A (en) * | 2018-12-20 | 2019-03-29 | 江苏科技大学 | A kind of power-economizing method suitable for windlass testing stand |
-
2017
- 2017-04-24 CN CN201720439163.9U patent/CN206705540U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109533198A (en) * | 2018-12-20 | 2019-03-29 | 江苏科技大学 | A kind of power-economizing method suitable for windlass testing stand |
| CN109533198B (en) * | 2018-12-20 | 2021-04-23 | 江苏科技大学 | Energy-saving method suitable for anchor machine test bed |
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Address after: 100007 Lama Temple street, Dongcheng District, Dongcheng District, Beijing Patentee after: Beijing lifting and conveying machinery design and Research Institute Co., Ltd. Address before: 100007 Lama Temple street, Dongcheng District, Dongcheng District, Beijing Patentee before: Beijing Materials Handling Research Institute |