CN203095359U - Elevator system - Google Patents
Elevator system Download PDFInfo
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- CN203095359U CN203095359U CN 201320009037 CN201320009037U CN203095359U CN 203095359 U CN203095359 U CN 203095359U CN 201320009037 CN201320009037 CN 201320009037 CN 201320009037 U CN201320009037 U CN 201320009037U CN 203095359 U CN203095359 U CN 203095359U
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- frequency converter
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- frequency
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Abstract
The utility model discloses an elevator system. The elevator system comprises a plurality of frequency converters, wherein the frequency converters are all connected to a power grid, and each frequency converter is connected with a motor. The elevator system further comprises a direct current (DC)/alternating current (AC) converter, DC buses of the frequency converters are mutually connected, the DC bus of each frequency converter is connected to the power grid through the DC/AC converter, the frequency converter with rising voltage of the DC buses among the frequency converters transmits electricity to other frequency converters, and when the voltage of the DC buses of all the frequency converters rises, the DC/AC converter converts the voltage of the DC bus of each frequency converter into the voltage of the power grid. The elevator system distributes the electricity generated by motors to other power-consuming motors in the elevator system through a method of sharing the DC buses, thereby obviously reducing energy wasted in the elevator system, and effectively playing a role in saving energy.
Description
Technical field
The utility model relates to a kind of elevator device, particularly relates to a kind of elevator device with frequency converter.
Background technology
Frequency converter has been used a very long time in elevator applications, in elevator device, all there is power generation process inevitably in motor, be rotor external force drag or the keeping of load self rotor inertia under, make the actual speed of motor greater than the synchronous speed of frequency converter output, the electric energy that motor sent will be stored in the frequency converter, if this part power consumption is not fallen, the DC bus-bar voltage of frequency converter will raise rapidly so, influences the normal operation of frequency converter.
And this electric energy that is produced by motor is a kind of available energy.And when adopting modes such as existing free parking, mechanical hatching gate or electric braking, this part energy has often directly been wasted.And along with the increase of number of motors in the elevator device and the use of high-effect frequency converter and Fu, the motor regenerated energy as load in the elevator device is more and more.Just manifesting of this energy dissipation is on the rise.
The utility model content
The technical problems to be solved in the utility model is in order to overcome in the prior art defective of the electric energy that effective motor produces, a kind of elevator device is provided, mode by the common DC bus is dispensed to the electric energy that motor produces in the motor of other power consumptions in elevator device, thereby the energy that can obviously reduce in the elevator device to be wasted plays energy-conservation effect effectively.
The utility model solves above-mentioned technical matters by following technical proposals:
The utility model provides a kind of elevator device, comprise a plurality of frequency converters, described frequency converter all is connected to an electrical network, each frequency converter all is connected with a motor, be characterized in, described elevator device also comprises a direct current AC converter, interconnects between the dc bus of each frequency converter, and the dc bus of each frequency converter also all is connected to described electrical network by described direct-current-alternating-current converter;
The frequency converter that DC bus-bar voltage raises in all described frequency converters transmits electric energy to remaining frequency converter;
When the DC bus-bar voltage of all described frequency converters all raises, described direct-current-alternating-current converter is converted into line voltage with the DC bus-bar voltage of each frequency converter.
Frequency converter described in the elevator device of the present utility model is a frequency converter conventional in the prior art, and its concrete function is voltage or the frequency that is used to adjust electrical network, thereby controls rotating speed of motor or voltage etc. effectively, so give unnecessary details no longer in detail herein.
Because in one or more transmissions of carrying out in the elevator device, the energy back that obtains from the motor side generating frequency converter to transmission takes place inevitably, this phenomenon just says also that " regenerated energy " motor is in generating state at this moment.Traditional approach often can only be wasted this electric energy.Provide electric energy with the electric energy of electric power generation for the frequency converter of other in running order motors in the utility model, thereby improve rate of energy.
That is to say that interconnect by dc bus at the frequency converter with a plurality of transmissions, when promptly described frequency converter was total to dc bus, the regenerated energy that one or more motors produce just can have been absorbed with electrically operated mode consumption by other motors.This is a kind of very effective mode of operation, even there are a plurality of motors to be in the uninterruptable power generation state always, also need not go to consider the mode of other processing regenerated energy again.
In addition, when all motors all are in generating state, also electric energy is fed back to electrical network in the utility model by direct-current-alternating-current converter, the voltage transitions that is about to dc bus is the alternating-current voltage/AC voltage of also pressing together with frequency, homophase with electrical network, even thereby all motors are in the uninterruptable power generation state always, also need not go to consider the mode of other processing regenerated energy again.
Preferably, include a bus capacitor that is used for storage of electrical energy in the described frequency converter.
The median generatrix of frequency converter described in the utility model electric capacity is used for the electric energy that the storage electric power generation produces when electric power generation, and the bus capacitor of the frequency converter that DC bus-bar voltage raises transmits electric capacity to the bus capacitor of other the uninflated frequency converter of DC bus-bar voltage, promptly from the bus capacitor transfer electrical energy of the high bus capacitor of voltage to other.
Preferably, the dc bus of each frequency converter all is connected with a wire fuse unit, and the dc bus of each frequency converter all is connected with the dc bus of remaining frequency converter by described wire fuse unit;
Voltage or the electric current when surpassing a threshold value of the described wire fuse of the dc bus bonded assembly unit of each frequency converter in the dc bus of described frequency converter, the dc bus that disconnects described frequency converter is connected with the dc bus of remaining frequency converter.
The dc bus of each described frequency converter interconnects in the utility model, i.e. common DC bus between all frequency converters.
And because when frequency converter damages, can produce high pressure and big electric current on the dc bus of frequency converter, thus can be when any one frequency converter damage in the utility model by the wire fuse unit, being connected between the frequency converter of disconnection damage and remaining frequency converter.
Preferably, described wire fuse unit comprises at least one wire fuse.
Preferably, the positive bus-bar of the dc bus of each described frequency converter is connected a wire fuse respectively with negative busbar.
Because dc bus generally is made of positive bus-bar and negative busbar; and interconnect between the bus described in the utility model; in case when having frequency converter to damage; electric energy on the dc bus of described damage frequency converter will be transferred to the dc bus of other frequency converter; thereby the frequency converter to other causes damage; break off being electrically connected between the frequency converter that damages and other the frequency converter up hill and dale so can be connected in series fast melting fuse, and then protect the safety of other frequency converter in positive bus-bar and negative busbar.
Preferably, described wire fuse is fast melting fuse.The wire fuse that described fast melting fuse is a prior art a kind of in the time of can producing high pressure and big electric current on the dc bus of the frequency converter that damages, disconnects being connected of the frequency converter that damages and all the other frequency converters rapidly.
Preferably, each frequency converter is connected with one first reactor, and each first reactor all is connected with described electrical network by one first filter.
Frequency converter described in the utility model comes the fluctuation of filtering and the described line voltage of inhibition etc. by reactor and filter.Wherein each frequency converter all connects the sudden change that a reactor suppresses to transfer to the line voltage of described frequency converter respectively, and described filter directly carries out filtering to electrical network, so each frequency converter only needs a shared filter just can realize filtering to electrical network in the utility model.
Preferably, described direct-current-alternating-current converter is connected with described electrical network with one second filter by one second reactor successively.
Equally, direct-current-alternating-current converter described in the utility model comes filtering by reactor and filter equally and suppresses voltage fluctuation etc. in the alternating-current voltage/AC voltage identical with line voltage of its output.
Preferably, described first filter and second filter are high-pass filter.
On the basis that meets this area general knowledge, above-mentioned each optimum condition, but combination in any promptly get each preferred embodiments of the utility model.
Positive progressive effect of the present utility model is:
In the mechanical system of using frequency converter and servo-control unit, kinetic energy or potential energy are transformed, are stored in the DC loop.Generally, unnecessary energy is consumed by the form of braking resistor with heat energy, and elevator device of the present utility model is reasonably distributed many employed electric energy of frequency converter by many frequency converters are total to dc bus.
And install insurance additional between each frequency converter, guarantee that normal operation impacts Shi Buhui to other equipment when the separate unit frequency converter breaks down.
Exchange the mode of conversion in addition by direct current, the dump energy that all motors in the whole elevator device produce can be fed back in the electrical network, thereby realize green, environmental protection and purpose of energy saving.
Description of drawings
Fig. 1 is the structural representation of the elevator device of the utility model preferred embodiment.
The specific embodiment
Mode below by embodiment further specifies the utility model, but therefore the utility model is not limited among the described scope of embodiments.
By the mode that is total to dc bus many elevator variable frequency devices are powered in the elevator device of present embodiment, in whole elevator device, the frequency converter that has is in uses electricity condition, what have then is in generating state, altogether the benefit of dc bus is exactly that the frequency converter of just can the electric energy that the generating frequency converter is unnecessary supplying with in power consumption uses, and has higher energy utilization rate.And fast melting fuse all is housed on the dc bus of every elevator variable frequency device, guarantee that the high pressure of a wherein elevator variable frequency device fault generation and big electric current can not cause damage to other frequency converters or equipment in the elevator device.Direct-current-alternating-current converter all is being in generating state as many frequency converters in elevator device, when DC bus-bar voltage will obviously raise, the DC bus-bar voltage of frequency converter is reverse into and the same frequency of electrical network, homophase and same alternating-current voltage/AC voltage of pressing, after multiple noise filtering link, feed back to AC network, thereby reach the purpose of energy feedback grid, effectively save electric energy.
Specifically, as shown in Figure 1, the elevator device of present embodiment comprises three motors 1, three frequency converters 2, four reactors 3, two filters 4, a direct current AC converter 5 and six fast melting fuses 6.Wherein said frequency converter 2 comprises a direct current bus and a bus capacitor (not shown) respectively.And each dc bus constitutes by a positive bus-bar and a negative busbar, and described positive bus-bar is by the anode+output of described frequency converter 2, and described negative busbar is passed through the negative terminal-output of described frequency converter 2.Filter described in the present embodiment 4 is high-pass filter, and those skilled in the art can freely select the filter that is fit to according to the actual state of line voltage, and is not limited only to the high-pass filter in the present embodiment.
Wherein as shown in Figure 1, each described frequency converter 2 is connected with a described motor 1 and a reactor 3; All be connected to a described filter 4 with 2 reactors of 3 described frequency converter 2 bonded assemblys respectively; The anode of each described frequency converter 2+and negative terminal-be connected to described direct-current-alternating-current converter 5 by a described fast melting fuse 6 respectively.Described direct-current-alternating-current converter 5 is connected to a described filter 4 by a described reactor 3.Each described filter 4 all is connected to an electrical network 7.
The concrete workflow of present embodiment is as described below:
1, any one or two are in generating state in 3 described motors 1, and promptly described motor 1 is converted into electric energy with kinetic energy or potential energy, then with in the bus capacitor of described power storage as for described motor 1 bonded assembly frequency converter 2.
Electric energy increase in the bus capacitor at this moment causes the voltage on the bus capacitor to increase, thereby causes the DC bus-bar voltage on the dc bus to increase.This is because remaining motor 1 is in running order, so DC bus-bar voltage can not increase in the connected frequency converter 2, thereby based on electric current flow principles in the electricity, at this moment, bus capacitor in the frequency converter 2 that DC bus-bar voltage increases will electric energy wherein be sent to in running order motor 1 bonded assembly frequency converter 2 in, thereby in running order motor 1 can utilize described electric energy to carry out work, thereby has realized the raising of the degree of utilization of electric energy.So need not go to consider the mode of other the described electric energy of processing again.
2, when 3 described motors 1 all are in generating state, as mentioned above, in the bus capacitor of power storage that this moment, described motor 1 produced as for described motor 1 bonded assembly frequency converter 2.DC bus-bar voltage on all dc buss all increases at this moment, described direct-current-alternating-current converter 5 was converted into the DC bus-bar voltage of each frequency converter 2 line voltage and fed back to electrical network 7 this moment, just be with the DC bus-bar voltage inversion with described electrical network 7 in the voltage homophase, with the frequently and same alternating-current voltage/AC voltage of voltage swing.
Wherein carry out filtering and suppress voltage fluctuation in conjunction with the alternating current that jointly electrical network 7 is delivered to each frequency converter 2, but also the alternating current that described direct-current-alternating-current converter 5 feeds back to described electrical network 7 is carried out filtering and suppresses voltage fluctuation at reactor 3 described in above-mentioned workflow 1 and 2 and filter 4.
And as shown in Figure 1; interconnect between the dc bus of all frequency converters 2 in the present embodiment; in case have when having the frequency converter that damages in the described frequency converter 2; electric energy on the dc bus of the frequency converter of described damage will be transferred to the dc bus of other frequency converter; thereby the frequency converter to other causes damage; so the fast melting fuse 6 of present embodiment utilization can produce high pressure and big characteristics of current on the dc bus of the frequency converter of meeting quick fuse and damage under specific big voltage and the big electric current; the anode of the frequency converter that damages+with negative terminal-with remaining frequency converter physically disconnected be connected; and then avoid on the dc bus of the frequency converter that damages high pressure and big electric current, thereby protect the safety of other frequency converter to the damage of remaining frequency converter.
Though more than described the specific embodiment of the present utility model, it will be understood by those of skill in the art that these only are casehistorys, protection domain of the present utility model is limited by appended claims.Those skilled in the art can make numerous variations or modification to these embodiments under the prerequisite that does not deviate from principle of the present utility model and essence, but these changes and modification all fall into protection domain of the present utility model.
Claims (9)
1. elevator device, comprise a plurality of frequency converters, described frequency converter all is connected to an electrical network, each frequency converter all is connected with a motor, it is characterized in that, described elevator device also comprises a direct current AC converter, interconnects between the dc bus of each frequency converter, and the dc bus of each frequency converter also all is connected to described electrical network by described direct-current-alternating-current converter;
The frequency converter that DC bus-bar voltage raises in all described frequency converters transmits electric energy to remaining frequency converter; When the DC bus-bar voltage of all described frequency converters all raises, described direct-current-alternating-current converter is converted into line voltage with the DC bus-bar voltage of each frequency converter.
2. elevator device as claimed in claim 1 is characterized in that, includes a bus capacitor that is used for storage of electrical energy in the described frequency converter.
3. elevator device as claimed in claim 1 is characterized in that, the dc bus of each frequency converter all is connected with a wire fuse unit, and the dc bus of each frequency converter all is connected with the dc bus of remaining frequency converter by described wire fuse unit;
Voltage or the electric current when surpassing a threshold value of the described wire fuse of the dc bus bonded assembly unit of each frequency converter in the dc bus of described frequency converter, the dc bus that disconnects described frequency converter is connected with the dc bus of remaining frequency converter.
4. elevator device as claimed in claim 3 is characterized in that, described wire fuse unit comprises at least one wire fuse.
5. elevator device as claimed in claim 4 is characterized in that, the positive bus-bar of the dc bus of each described frequency converter is connected a wire fuse respectively with negative busbar.
6. as claim 4 or 5 described elevator devices, it is characterized in that described wire fuse is fast melting fuse.
7. elevator device as claimed in claim 1 is characterized in that, each frequency converter is connected with one first reactor, and each first reactor all is connected with described electrical network by one first filter.
8. elevator device as claimed in claim 7 is characterized in that, described direct-current-alternating-current converter is connected with described electrical network with one second filter by one second reactor successively.
9. as claim 7 or 8 described elevator devices, it is characterized in that described first filter and second filter are high-pass filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320009037 CN203095359U (en) | 2013-01-08 | 2013-01-08 | Elevator system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320009037 CN203095359U (en) | 2013-01-08 | 2013-01-08 | Elevator system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203095359U true CN203095359U (en) | 2013-07-31 |
Family
ID=48846781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320009037 Expired - Fee Related CN203095359U (en) | 2013-01-08 | 2013-01-08 | Elevator system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203095359U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104058305A (en) * | 2014-07-02 | 2014-09-24 | 吴优良 | Integration intelligent elevator control system |
-
2013
- 2013-01-08 CN CN 201320009037 patent/CN203095359U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104058305A (en) * | 2014-07-02 | 2014-09-24 | 吴优良 | Integration intelligent elevator control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20150108 |
|
| EXPY | Termination of patent right or utility model |