CN203826986U - LC filtering elevator energy feedback circuit - Google Patents
LC filtering elevator energy feedback circuit Download PDFInfo
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- CN203826986U CN203826986U CN201420175425.1U CN201420175425U CN203826986U CN 203826986 U CN203826986 U CN 203826986U CN 201420175425 U CN201420175425 U CN 201420175425U CN 203826986 U CN203826986 U CN 203826986U
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- 238000001914 filtration Methods 0.000 title claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims abstract description 37
- 230000033228 biological regulation Effects 0.000 claims description 15
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000010355 oscillation Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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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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- Elevator Control (AREA)
Abstract
The utility model relates to an LC filtering elevator energy feedback circuit comprising a three-phase uncontrollable rectification module, a DC bus side capacitor, a three-phase full-bridge controllable inversion module, and an elevator traction machine which are connected successively. The three-phase full-bridge controllable inversion module is also connected with a three-phase power grid through a grid-connected inverter. The main technical characteristics of the utility model are that the LC filtering elevator energy feedback circuit also comprises an LC filter, an isolating diode, and a voltage-stabilizing capacitor, that the LC filter is connected between the output end of the grid-connected inverter and the three-phase power grid, that the voltage-stabilizing capacitor is connected with the input end of the grid-connected inverter in parallel, that the P electrode of the isolating diode is connected with the positive pole of the DC bus side capacitor, and that the N electrode of the isolating diode is connected with the positive pole of the voltage-stabilizing capacitor. The elevator energy feedback circuit makes full use of a characteristic of the large circuit equivalent resistance of low-power elevator systems in 7.5 kW and below, and may effectively suppress oscillation with grid-side equivalent resistance and filter higher harmonic of grid-connected current while not generating extra loss. The LC filtering elevator energy feedback circuit is high in system stability and obvious in social benefit and economic benefit.
Description
Technical field
The utility model belongs to elevator control technology field, especially a kind of LC filtering lift energy feedback circuit.
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 guaranteeing 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.Development along with 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, and system is controlled complicated, and parameter designing is complicated and resonance easily occurs, and threatens system stability.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of reasonable in design, stable performance, volume is little and cost is low LC filtering lift energy feedback circuit are provided.
The utility model solves existing technical problem and takes following technical scheme to realize:
A LC filtering lift energy feedback circuit, 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 comprised 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 3rd filter capacitor C3 with the first filter capacitor C1, the second filter capacitor C2 respectively.
And, between the first described filter capacitor C1, the second filter capacitor C2 and the 3rd filter capacitor C3, be star-like connection.
Advantage of the present utility model and good effect are:
1, this lift energy feedback circuit 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 lift energy feedback circuit 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 lift energy feedback circuit makes full use of 7.5KW and following small power elevator system has the advantages that circuit equivalent resistance is large, by net side equivalent resistance, can effectively suppress vibration, 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.
Accompanying drawing explanation
Fig. 1 is integrated circuit schematic diagram of the present utility model;
Fig. 2 is LC filter details circuit diagram of the present utility model.
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 utility model embodiment is further described.
A kind of LC filtering lift energy feedback circuit, 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, by DC bus capacitor filtering voltage regulation, exported, 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 three phase network with combining inverter output 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 comprised 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 3rd filter capacitor C3 with the first filter capacitor C1, the second filter capacitor C2 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 lift energy feedback main circuit will be 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 utility model 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 guarantee the normal work of LC filtering lift energy feedback circuit, prevent that power network current from flowing into DC bus lateral capacitance through combining inverter.
Traction motor is when 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 during 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, and voltage stabilizing is three-phase main-frequency alternating current by 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 utility model, control easily, 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, does not produce excess loss, and the stability of a system is high.
It is emphasized that; embodiment described in the utility model is illustrative; rather than determinate; therefore the utility model comprises and is not limited to the embodiment described in embodiment; every other execution modes that drawn according to the technical solution of the utility model by those skilled in the art, belong to the scope that the utility model is protected equally.
Claims (4)
1. a LC filtering lift energy feedback circuit, 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 lift energy feedback circuit according to claim 1, is characterized in that: described LC filter is symmetric form circuit.
3. a kind of LC filtering lift energy feedback circuit 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 form, 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 lift energy feedback circuit according to claim 3, is characterized in that: between the first described 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 |
|---|---|---|---|
| CN201420175425.1U CN203826986U (en) | 2014-04-11 | 2014-04-11 | LC filtering elevator energy feedback circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420175425.1U CN203826986U (en) | 2014-04-11 | 2014-04-11 | LC filtering elevator energy feedback circuit |
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| Publication Number | Publication Date |
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| CN203826986U true CN203826986U (en) | 2014-09-10 |
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| CN201420175425.1U Expired - Lifetime CN203826986U (en) | 2014-04-11 | 2014-04-11 | LC filtering elevator energy feedback circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944184A (en) * | 2014-04-11 | 2014-07-23 | 天津鑫宝龙电梯集团有限公司 | LC filter elevator energy feedback device |
| CN104386550A (en) * | 2014-09-16 | 2015-03-04 | 苏州菱怡电梯有限公司 | Energy feedback device for elevator |
| CN108597349A (en) * | 2018-07-23 | 2018-09-28 | 顺德职业技术学院 | A kind of elevator regenerated energy feedback net circuit |
| CN108732441A (en) * | 2018-05-07 | 2018-11-02 | 天津瑞能电气有限公司 | A kind of aging testing system based on current transformer product |
-
2014
- 2014-04-11 CN CN201420175425.1U patent/CN203826986U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944184A (en) * | 2014-04-11 | 2014-07-23 | 天津鑫宝龙电梯集团有限公司 | LC filter elevator energy feedback device |
| CN104386550A (en) * | 2014-09-16 | 2015-03-04 | 苏州菱怡电梯有限公司 | Energy feedback device for elevator |
| CN108732441A (en) * | 2018-05-07 | 2018-11-02 | 天津瑞能电气有限公司 | A kind of aging testing system based on current transformer product |
| CN108597349A (en) * | 2018-07-23 | 2018-09-28 | 顺德职业技术学院 | A kind of elevator regenerated energy feedback net circuit |
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| GR01 | Patent grant | ||
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Granted publication date: 20140910 |
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| CX01 | Expiry of patent term |