CN103944184A - LC filter elevator energy feedback device - Google Patents
LC filter elevator energy feedback device Download PDFInfo
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- CN103944184A CN103944184A CN201410143286.9A CN201410143286A CN103944184A CN 103944184 A CN103944184 A CN 103944184A CN 201410143286 A CN201410143286 A CN 201410143286A CN 103944184 A CN103944184 A CN 103944184A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The invention relates to an LC filter elevator energy feedback device which comprises a three-phase uncontrollable rectifier module, a direct-current bus side capacitor, a three-phase full-bridge controllable inverter module and an elevator traction machine, wherein the three-phase uncontrollable rectifier module, the direct-current bus side capacitor, the three-phase full-bridge controllable inverter module and the elevator traction machine are sequentially connected. The three-phase full-bridge controllable inverter module is connected with a three-phase power grid through a grid -connected inverter at the same time. The device is characterized in that an LC filter, an isolating diode and a voltage stabilizing capacitor are further included, the LC filter is connected between the output end of the grid-connected inverter and the three-phase power grid, the voltage stabilizing capacitor is connected with the input end of the grid-connected inverter in parallel, the P electrode of the isolating diode is connected with the positive pole of the direct-current bus side capacitor, and the N electrode of the isolating diode is connected with the positive pole of the voltage stabilizing capacitor. According to the elevator energy feedback device, the characteristic that a low-power elevator system with the power of 7.5 KW or below has large circuit equivalent resistance is fully used, oscillation can be effectively prevented through network side equivalent resistance, grid-connected current high harmonics are filtered, extra loss is not generated, system stability is high, and social benefits and economic benefits are remarkable.
Description
Technical field
The invention belongs to elevator control technology field, especially a kind of LC filtering elevator energy feedback device.
Background technology
Along with the quickening of Urbanization Construction process, many urban architectures all start to develop to vertical direction.As the main traffic instrument in skyscraper, floor is more, and the energy consumption of elevator is just larger, and the development of energy conservation type society is just higher to the requirement of elevator energy-saving, and intelligent, efficient, environmental protection will become development trend and the common objective of following elevator industry.
In elevator variable frequency governing system, elevator is as potential energy loading high, descending in heavy duty, underloading is up or when braking, traction machine is in regenerative power generation state, the regenerative electric energy producing is converted to direct current by inverter, be transferred in DC bus lateral capacitance and produce pump up voltage, if this part voltage can not process in time, by serious threat system safety.For ensureing elevator safety operation and rationally utilizing this part electric energy, realize energy-saving safe operation, how processing elevator regenerated energy becomes the key of dealing with problems.
The processing of elevator regenerated energy is mainly divided into two kinds of energy-dissipating type and feedback types, using at present more technical scheme is to electrical network, as Chinese patent literature " discrete self-charging elevator energy feedback device " (publication number is CN101565138A) proposes to utilize isolating diode energy feedback unit to be connected in parallel on to the application that is feedback type scheme between electrical network and the DC side of elevator variable frequency governing system by elevator regenerated energy feedback.Along with the development of distributed power source, productive life improves the requirement of the electrical network quality of power supply, country has formulated strict standard-required to the feed quality of grid-connected system, the realization key of this structure is the processing of regenerated energy, not only needing regenerated energy inversion is and the synchronous alternating current of electrical network same frequency more to need effectively to suppress harmonic wave.Lift energy feedback filter generally includes L, LC and LCL three types, and L-type filter construction is simple, but not obvious to the filtration result of switching harmonics, high frequency characteristics is poor, adds big inductance quantity raising filter effect and will cause system bulk large; LCL mode filter is good to the inhibition of high order harmonic component, but it is third-order system, system control complexity, and parameter designing is complicated and resonance easily occurs, and threatens system stability.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of reasonable in design, stable performance, volume is little and cost is low LC filtering elevator energy feedback device are provided.
The present invention solves existing technical problem and takes following technical scheme to realize:
A kind of LC filtering elevator energy feedback device, comprises the uncontrollable rectification module of three-phase, DC bus lateral capacitance, the controlled inversion module of three phase full bridge, elevator traction machine and combining inverter; The uncontrollable rectification module of three-phase, DC bus lateral capacitance, the controlled inversion module of three phase full bridge are connected successively with elevator traction machine, the controlled inversion module of three phase full bridge connects three phase network simultaneously after combining inverter, also comprise LC filter, isolating diode and electric capacity of voltage regulation, between described LC filter access grid-connected inverter output and three phase network, described electric capacity of voltage regulation is in parallel with combining inverter input, the P utmost point of described isolating diode is connected with DC bus lateral capacitance is anodal, and the N utmost point of this isolating diode is connected with electric capacity of voltage regulation is anodal.
And described LC filter is symmetric form circuit.
And, described LC filter is made up of the first filter inductance L1, the second filter inductance L2, the 3rd filter inductance L3, the first filter capacitor C1, the second filter capacitor C2 and the 3rd filter capacitor C3, one end of described the first filter inductance L1, the second filter inductance L2, the 3rd filter inductance L3 is connected with the ac output end of combining inverter respectively, and the other end of the first filter inductance L1, the second filter inductance L2, the 3rd filter inductance L3 connects three phase network and is connected with the first filter capacitor C1, the second filter capacitor C2 and the 3rd filter capacitor C3 respectively.
And, between described the first filter capacitor C1, the second filter capacitor C2 and the 3rd filter capacitor C3, be star-like connection.
Advantage of the present invention and good effect are:
1, this elevator energy feedback device adopts the LC filter can effectively filtering high order harmonic component, and the feature such as parameter designing is simple, has good wave filtering effect, control simply, volume is little, cost is low.
2, the energy feedback part independence of this elevator energy feedback device is good, and the work of energy feedback circuit does not affect original elevator variable frequency speed drive circuit and normally moves, and system safety performance is higher.
3, this elevator energy feedback device makes full use of 7.5KW and following small power elevator system has the advantages that circuit equivalent resistance is large, can effectively suppress vibration by net side equivalent resistance, filtering grid-connected current high order harmonic component, and do not produce excess loss, the stability of a system is high, and Social benefit and economic benefit is obvious.
Brief description of the drawings
Fig. 1 is integrated circuit schematic diagram of the present invention;
Fig. 2 is LC filter details circuit diagram of the present invention.
In figure, 1: the uncontrollable rectification module of three-phase, 2: DC bus lateral capacitance, 3: the controlled inversion module of three phase full bridge, 4: elevator traction machine, 5: isolating diode, 6: electric capacity of voltage regulation, 7: combining inverter, 8:LC filter.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the present invention is further described.
A kind of LC filtering elevator energy feedback device, as shown in Figure 1, comprise the uncontrollable rectification module 1 of three-phase, DC bus lateral capacitance 2, the controlled inversion module 3 of three phase full bridge, elevator traction machine 4, isolating diode 5, electric capacity of voltage regulation 6, combining inverter 7 and LC filter 8, the uncontrollable rectification module of three-phase, DC bus lateral capacitance, the controlled inversion module of three phase full bridge is connected successively with elevator traction machine, three phase network power supply signal is through the uncontrollable rectification module rectification of three-phase, exported by DC bus capacitor filtering voltage regulation, the controlled inversion module of three phase full bridge is that alternating current exports elevator traction machine to by the DC inverter of output, the controlled inversion module of three phase full bridge connects three phase network simultaneously after combining inverter, described LC filter is connected with combining inverter output and three phase network respectively, described electric capacity of voltage regulation is in parallel with combining inverter input, the P utmost point of described isolating diode is connected with DC side bus capacitor is anodal, and the N utmost point of isolating diode is connected with electric capacity of voltage regulation is anodal.
Described LC filter is made up of the first filter inductance L1, the second filter inductance L2, the 3rd filter inductance L3, the first filter capacitor C1, the second filter capacitor C2 and the 3rd filter capacitor C3, and LC filter is symmetric form circuit, L1=L2=L3, C1=C2=C3.The first filter inductance L1 of LC filter, one end of the second filter inductance L2, the 3rd filter inductance L3 are connected with the ac output end of combining inverter respectively, the other end of the first filter inductance L1, the second filter inductance L2, the 3rd filter inductance L3 connects three phase network, and be connected with the first filter capacitor C1, the second filter capacitor C2 and the 3rd filter capacitor C3 respectively, between the first filter capacitor C1, the second filter capacitor C2 and the 3rd filter capacitor C3, be star-like connection.
This LC filtering elevator energy feedback device is mainly applicable to 7.5KW and following small power elevator system thereof, this system line resistance is large, can not ignore, so also should consider the first circuit equivalent resistance R1, the second circuit equivalent resistance R2, the impact of tertiary circuit equivalent resistance R3, as shown in Figure 2, above-mentioned three equivalent resistance R1, R2, R3 is respectively by a, b, c three-phase conducting wire resistance, the first filter inductance to the three filter inductance L1, L2, L3 dead resistance and the first filter capacitor to the three filter capacitor C1, C2, the all-in resistance of C3 dead resistance equivalence, R1=R2=R3.
Below the course of work of the present invention is described:
In view of the input of combining inverter in parallel with electric capacity of voltage regulation, in parallel with DC bus lateral capacitance through isolating diode again, the output of combining inverter is connected with outer three phase network through LC filter, the isolating diode of having connected between DC bus lateral capacitance and electric capacity of voltage regulation, and the P utmost point of isolating diode is connected with DC side bus capacitor is anodal, the N utmost point is connected with electric capacity of voltage regulation is anodal, can ensure the normal work of LC filtering elevator energy feedback device, prevent that power network current from flowing into DC bus lateral capacitance through combining inverter.
Traction motor is in the time of motoring condition, electrical network three-phase ac signal is through the uncontrollable rectification module rectification of three-phase, DC bus lateral capacitance connects respectively the uncontrollable rectification module of three-phase and the controlled inversion module of three phase full bridge, the filtering characteristic of electric capacity makes DC voltage held stationary, reduce ripple, the controlled inversion module of three phase full bridge is by the three-phase alternating current electric drive 7.5KW that DC inverter is voltage, frequency is adjustable and the following elevator traction machine thereof of the output of DC bus lateral capacitance.
Elevator is up in underloading, heavy duty is descending or when braking, traction motor is in generating state, the fly-wheel diode rectification of the regenerated energy producing in the controlled inversion module of three phase full bridge is converted to direct current, the one-way conduction characteristic of the uncontrollable rectification module of three-phase can only be charged to DC bus lateral capacitance this part direct current, DC bus lateral capacitance voltage pump rise, this part energy flows into electric capacity of voltage regulation both sides through isolating diode, after voltage stabilizing, is three-phase main-frequency alternating current through combining inverter inversion.The three-phase main-frequency alternating current that adopts LC filter to produce combining inverter inversion carries out high order harmonic component filtering, make grid-connected current harmonic wave reach standard, and networking electric current is consistent with electric network voltage phase, reach with frequency homophase, line network side equivalent resistance suppresses LC vibration, and filtered electric energy feedback is to three phase network.
LC filter parameter simplicity of design in the present invention, controls easily, and cost is low, and due in 7.5KW and following small power elevator system thereof, the line resistance of net side wire can not be ignored, its net side equivalent resistance can effectively suppress vibration, do not produce excess loss, the stability of a system is high.
It is emphasized that; embodiment of the present invention is illustrative; instead of determinate; therefore the present invention includes and be not limited to the embodiment described in embodiment; every other execution modes that drawn by those skilled in the art's technical scheme according to the present invention, belong to the scope of protection of the invention equally.
Claims (4)
1. a LC filtering elevator energy feedback device, comprises the uncontrollable rectification module of three-phase, DC bus lateral capacitance, the controlled inversion module of three phase full bridge, elevator traction machine and combining inverter, the uncontrollable rectification module of three-phase, DC bus lateral capacitance, the controlled inversion module of three phase full bridge is connected successively with elevator traction machine, the controlled inversion module of three phase full bridge connects three phase network simultaneously after combining inverter, it is characterized in that: also comprise LC filter, isolating diode and electric capacity of voltage regulation, between described LC filter access grid-connected inverter output and three phase network, described electric capacity of voltage regulation is in parallel with combining inverter input, the P utmost point of described isolating diode is connected with DC bus lateral capacitance is anodal, the N utmost point of this isolating diode is connected with electric capacity of voltage regulation is anodal.
2. a kind of LC filtering elevator energy feedback device according to claim 1, is characterized in that: described LC filter is symmetric form circuit.
3. a kind of LC filtering elevator energy feedback device according to claim 1 and 2, it is characterized in that: described LC filter is by the first filter inductance L1, the second filter inductance L2, the 3rd filter inductance L3, the first filter capacitor C1, the second filter capacitor C2 and the 3rd filter capacitor C3 composition, described the first filter inductance L1, the second filter inductance L2, one end of the 3rd filter inductance L3 is connected with the ac output end of combining inverter respectively, the first filter inductance L1, the second filter inductance L2, the other end of the 3rd filter inductance L3 connect three phase network and respectively with the first filter capacitor C1, the second filter capacitor C2 is connected with the 3rd filter capacitor C3.
4. a kind of LC filtering elevator energy feedback device according to claim 3, is characterized in that: between described the first filter capacitor C1, the second filter capacitor C2 and the 3rd filter capacitor C3, be star-like connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410143286.9A CN103944184A (en) | 2014-04-11 | 2014-04-11 | LC filter elevator energy feedback device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410143286.9A CN103944184A (en) | 2014-04-11 | 2014-04-11 | LC filter elevator energy feedback device |
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| CN103944184A true CN103944184A (en) | 2014-07-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104326342A (en) * | 2014-10-16 | 2015-02-04 | 广西正源电机有限公司 | Elevator control device with feedback function |
| CN104386550A (en) * | 2014-09-16 | 2015-03-04 | 苏州菱怡电梯有限公司 | Energy feedback device for elevator |
| CN105226792A (en) * | 2015-11-10 | 2016-01-06 | 徐勇 | A kind of integrated energy feedback, the converter device of stored energy and emergency power supply function |
Citations (6)
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| CN200983561Y (en) * | 2006-11-06 | 2007-11-28 | 张国良 | Voltage self-control power feedback part |
| CN101565138A (en) * | 2009-05-18 | 2009-10-28 | 天津大学 | Discrete self-charging elevator energy feedback device |
| CN101710719A (en) * | 2009-12-16 | 2010-05-19 | 上海永大吉亿电机有限公司 | Circuit structure for common-mode inductors with damping resistors applied to energy feedback devices |
| US20130063070A1 (en) * | 2011-09-13 | 2013-03-14 | Delta Electronics (Shanghai) Co., Ltd. | Medium voltage variable frequency driving system |
| CN103117558A (en) * | 2013-03-07 | 2013-05-22 | 天津鑫宝龙电梯集团有限公司 | Elevator energy feedback device with lower control limit filtering functions |
| CN203826986U (en) * | 2014-04-11 | 2014-09-10 | 天津鑫宝龙电梯集团有限公司 | LC filtering elevator energy feedback circuit |
-
2014
- 2014-04-11 CN CN201410143286.9A patent/CN103944184A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200983561Y (en) * | 2006-11-06 | 2007-11-28 | 张国良 | Voltage self-control power feedback part |
| CN101565138A (en) * | 2009-05-18 | 2009-10-28 | 天津大学 | Discrete self-charging elevator energy feedback device |
| CN101710719A (en) * | 2009-12-16 | 2010-05-19 | 上海永大吉亿电机有限公司 | Circuit structure for common-mode inductors with damping resistors applied to energy feedback devices |
| US20130063070A1 (en) * | 2011-09-13 | 2013-03-14 | Delta Electronics (Shanghai) Co., Ltd. | Medium voltage variable frequency driving system |
| CN103117558A (en) * | 2013-03-07 | 2013-05-22 | 天津鑫宝龙电梯集团有限公司 | Elevator energy feedback device with lower control limit filtering functions |
| CN203826986U (en) * | 2014-04-11 | 2014-09-10 | 天津鑫宝龙电梯集团有限公司 | LC filtering elevator energy feedback circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104386550A (en) * | 2014-09-16 | 2015-03-04 | 苏州菱怡电梯有限公司 | Energy feedback device for elevator |
| CN104326342A (en) * | 2014-10-16 | 2015-02-04 | 广西正源电机有限公司 | Elevator control device with feedback function |
| CN105226792A (en) * | 2015-11-10 | 2016-01-06 | 徐勇 | A kind of integrated energy feedback, the converter device of stored energy and emergency power supply function |
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Application publication date: 20140723 |