CN202221965U - Elevator frequency converter - Google Patents
Elevator frequency converter Download PDFInfo
- Publication number
- CN202221965U CN202221965U CN2011203036435U CN201120303643U CN202221965U CN 202221965 U CN202221965 U CN 202221965U CN 2011203036435 U CN2011203036435 U CN 2011203036435U CN 201120303643 U CN201120303643 U CN 201120303643U CN 202221965 U CN202221965 U CN 202221965U
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- CN
- China
- Prior art keywords
- inverter
- rectifier
- frequency converter
- elevator
- elevator frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Elevator Control (AREA)
Abstract
The utility model provides an elevator frequency converter including a rectifier. An inverter is connected to the rear end of the rectifier. A power accumulator is connected between the rectifier and the inverter in parallel. The rectifier and the inverter are both composed of inverting devices. The inverter is controlled by a pulse modulator. The elevator frequency converter in the utility model has a simple structure, a small volume and a low cost. Electric energy fed back has no harmonic wave and no idle work and does not pollute a power grid. Thus, elevator frequency converter has a good energy saving effect.
Description
Technical field
The utility model relates to a kind of power supply for elevator, relates in particular to a kind of elevator variable frequency device.
Background technology
Elevator generally adopts frequency converter as electric supply installation; General frequency converter is AC-DC-AC voltage-type structure mostly on the main flow market at present; Be that three-phase alternating current at first is rectified into direct current through diode rectifier, pass through inverter again, the alternating current of output voltage, frequency adjustable.
But because the irreversibility of this rectifier, when elevator is in reproduced state, a large amount of electric energy of feedback in the short time, the capacitance voltage of frequency converter DC side rises suddenly, and high pressure and incident high temperature can cause great pressure to frequency converter; Like this, not only waste a large amount of electric energy, and can influence the life-span of transducer element.
For addressing this problem, some elevator directly increases by one group of inverter in the dc bus side on original frequency converter basis, as shown in Figure 1; But such system circuit is complicated; Cost and volume all increase thereupon, and can inject a large amount of harmonic waves and idle work to electrical network, cause serious electric network pollution.
The utility model content
The utility model provides a kind of energy-conservation, effective elevator variable frequency device for solving the prior art problem.
The technical scheme of the utility model is: a kind of elevator variable frequency device, comprise rectifier, and the rear end of this rectifier is connected with inverter, is parallel with accumulator between said rectifier and the inverter; Said rectifier and inverter are formed by inverter, and said inverter is controlled by pulse modulator.
As preferably, said accumulator is a storage capacitor.
As preferably, said inverter comprises insulated gate bipolar transistor and protection diode.
In sum, the utlity model has following advantage:
1, simple in structure, volume is little, and cost is lower;
2, the electric energy of feedback does not have harmonic wave and idle work, can not produce electrical network and pollute good energy-conserving effect.
Description of drawings
Fig. 1 is traditional energy-saving type frequency conversion device topological structure sketch map;
Fig. 2 is the utility model topological structure sketch map.
Among the figure, 1, inverter, 2, storage capacitor, 3, three phase mains, 4, motor, 5, rectifier, 6, inverter.
Embodiment
The utility model is described further with embodiment below in conjunction with accompanying drawing.
A kind of elevator variable frequency device comprises rectifier 5, and the rear end of this rectifier 5 is connected with inverter 6, is parallel with storage capacitor 2 between said rectifier 5 and the inverter 6; Said rectifier 5 is formed by inverter 1 with inverter 6, and said inverter is controlled by pulse modulator.
Said inverter 1 comprises insulated gate bipolar transistor and protection diode.
When motor 4 is in motor status; Three phase mains 3 through rectifier 5 and inverter 6 to motor 4 transmission of electric energy; Pulse modulator control inverter makes the voltage of output be directly proportional with operating frequency, motor 4 output constant force squares; And the input current of motor 4 is sinusoidal wave, the loss of no higher harmonic current; When motor 4 is in generating state; The energy that motor 4 produces charges to storage capacitor 2 through inverter 6; After the voltage at storage capacitor 2 two ends is increased to above line voltage; Electric energy feeds back to electrical network, and the electric energy electric voltage frequency of the electric energy of feedback and electrical network is identical, phase place is opposite, and the system power factor approximates-1.
Claims (3)
1. elevator variable frequency device, it is characterized in that: comprise rectifier, the rear end of this rectifier is connected with inverter, is parallel with accumulator between said rectifier and the inverter; Said rectifier and inverter are formed by inverter, and said inverter is controlled by pulse modulator.
2. according to the said elevator variable frequency device of claim 1, it is characterized in that: said accumulator is a storage capacitor.
3. according to the said elevator variable frequency device of claim 1, it is characterized in that: said inverter comprises insulated gate bipolar transistor and protection diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203036435U CN202221965U (en) | 2011-08-19 | 2011-08-19 | Elevator frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203036435U CN202221965U (en) | 2011-08-19 | 2011-08-19 | Elevator frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202221965U true CN202221965U (en) | 2012-05-16 |
Family
ID=46043984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203036435U Expired - Fee Related CN202221965U (en) | 2011-08-19 | 2011-08-19 | Elevator frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202221965U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106487261A (en) * | 2016-11-03 | 2017-03-08 | 广东卓梅尼技术股份有限公司 | Elevator variable frequency system |
-
2011
- 2011-08-19 CN CN2011203036435U patent/CN202221965U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106487261A (en) * | 2016-11-03 | 2017-03-08 | 广东卓梅尼技术股份有限公司 | Elevator variable frequency 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: 20120516 Termination date: 20170819 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |