CN202612060U - Air compressor - Google Patents
Air compressor Download PDFInfo
- Publication number
- CN202612060U CN202612060U CN 201220255830 CN201220255830U CN202612060U CN 202612060 U CN202612060 U CN 202612060U CN 201220255830 CN201220255830 CN 201220255830 CN 201220255830 U CN201220255830 U CN 201220255830U CN 202612060 U CN202612060 U CN 202612060U
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- air compressor
- control switch
- frequency variator
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Abstract
The utility model relates to motor control, in particular to an air compressor in the motor control. The air compressor comprises a frequency converter and an air compressor body, the input end of the frequency converter is respectively connected with an R phase, an S phase and a T phase of three-phase alternating current through a second control switch, the output end of the frequency converter is respectively connected with a u1 end, a v1 end and a w1 end of the air compressor body, a u2 end, a v2 end and a w2 end of the air compressor body are respectively connected with a fourth control switch, a first control switch is connected between the input end and the output end of the frequency converter, and a third control switch is connected between the u1 end, the v1 end and the w1 end and the u2 end, the v2 end and the w2 end of the air compressor body. The air compressor has the advantages of being small in starting current, not prone to abrade, low in maintenance cost and low in noise and saving energy.
Description
Technical field
The utility model relates to Electric Machine Control, relates in particular to a kind of air compressor in the Electric Machine Control.
Background technique
Air compressor has very widely in the commercial production occasion to be used, but air compressor mostly drives by power frequency supply, and there is following problem in this application meeting:
Though 1. can star-triangle start, for high-power air compressor, inrush current is still very big, can influence the stable of electrical network with in the operation of other consumer;
2. lighter even when unloaded when load, motor still with the rated speed operation, causes severe energy waste;
3. when power frequency drove, inrush current is big, and was big to the impact of equipment, the motor bearings easy abrasion, and equipment maintenance cost improves;
4. when air compressor was operated in rated speed, noise was a lot of greatly during than the slow-speed of revolution.
Summary of the invention
In order to solve the problems of the prior art, the utility model provides a kind of air compressor.
The utility model provides a kind of air compressor; Comprise frequency variator and air compressor; The input end of said frequency variator through second control switch respectively with the R of threephase AC mutually, S phase, T be connected; The output terminal of said frequency variator is connected with u1 end, v1 end, the w1 end of said air compressor respectively; The u2 end of said air compressor, v2 end, w2 end are connected with the 4th control switch respectively, are connected with first control switch between the input end of said frequency variator and the output terminal, are connected with the 3rd control switch between the u1 end of said air compressor, v1 end, w1 end and u2 end, v2 end, the w2 end.
As the further improvement of the utility model, said frequency variator is connected with pressure transducer.
As the further improvement of the utility model, said pressure transducer is arranged on the pressure output of said air compressor.
The beneficial effect of the utility model is: through such scheme, inrush current is less, and energy saving is not easy wearing and tearing, and maintenance cost is low, and noise is less.
Description of drawings
Fig. 1 is the circuit diagram of a kind of air compressor of the utility model.
Embodiment
Below in conjunction with description of drawings and embodiment the utility model is further specified.
Drawing reference numeral among Fig. 1 is: frequency variator 1; First control switch 21; Second control switch 22; The 3rd control switch 23; The 4th control switch 24; Air compressor 3.
As shown in Figure 1; A kind of air compressor; Comprise frequency variator 1 and air compressor 3; The input end of said frequency variator 1 through second control switch 22 respectively with the R of threephase AC mutually, S phase, T be connected, the output terminal of said frequency variator 1 is connected with u1 end, v1 end, the w1 end of said air compressor 3 respectively, the u2 end of said air compressor 3, v2 end, w2 hold and are connected with the 4th control switch 24 respectively; Be connected in parallel to first control switch 21 between the input end of said frequency variator 1 and the output terminal, be connected in parallel to the 3rd control switch 23 between the u1 end of said air compressor 3, v1 end, w1 end and u2 end, v2 end, the w2 end.
As shown in Figure 1, said frequency variator 1 is connected with pressure transducer.
As shown in Figure 1, said pressure transducer is arranged on the pressure output of said air compressor 3.
The working principle of a kind of air compressor that the utility model provides is:
The converting operation mode: second control switch 22, the 3rd control switch 23 closures, first control switch 21, the 4th control switch 24 break off, and air compressor 3 is driven by frequency variator 1.Frequency variator 1 detects air compressor 3 current pressures through pressure transducer, and obtains output frequency behind the setting pressure comparison union.When air compressor 3 had load, frequency variator 1 output frequency regulation range was between lower frequency and the lower frequency limit; When air compressor 3 zero loads, frequency variator 1 operates in lower frequency limit air compressor pressure and still can rise, and frequency variator 1 gets into state of dormancy at this moment; When air compressor 3 had load again, frequency variator 1 woke up from state of dormancy, began output.
The power frequency operation mode: second control switch 22 breaks off, first control switch 21, the 4th control switch 24 closures during startup, y connection, reduced-voltage starting; Start back 2 seconds, the 4th control switch 24 breaks off, the 3rd control switch 23 closures, and triangle connects, the total head operation.
Automatically the method for operation: during air compressor 3 undercapacity situation, drive by frequency variator 1, second control switch 22, the 3rd control switch 23 closures, first control switch 21, the 4th control switch 24 break off; During fully loaded or frequency variator 1 fault, switch to power frequency operation by frequency variator 1 when air compressor 3, second control switch 22 breaks off first control switch, 21 closures.
Above content is the further explain that combines concrete preferred implementation that the utility model is done, and can not assert that the practical implementation of the utility model is confined to these explanations.For the those of ordinary skill of technical field under the utility model, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the protection domain of the utility model.
Claims (3)
1. air compressor; It is characterized in that: comprise frequency variator and air compressor; The input end of said frequency variator through second control switch respectively with the R of threephase AC mutually, S phase, T be connected; The output terminal of said frequency variator is connected with u1 end, v1 end, the w1 end of said air compressor respectively; The u2 end of said air compressor, v2 end, w2 end are connected with the 4th control switch respectively, are connected with first control switch between the input end of said frequency variator and the output terminal, are connected with the 3rd control switch between the u1 end of said air compressor, v1 end, w1 end and u2 end, v2 end, the w2 end.
2. air compressor according to claim 1 is characterized in that: said frequency variator is connected with pressure transducer.
3. air compressor according to claim 2 is characterized in that: said pressure transducer is arranged on the pressure output of said air compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220255830 CN202612060U (en) | 2012-06-01 | 2012-06-01 | Air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220255830 CN202612060U (en) | 2012-06-01 | 2012-06-01 | Air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202612060U true CN202612060U (en) | 2012-12-19 |
Family
ID=47345766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220255830 Expired - Fee Related CN202612060U (en) | 2012-06-01 | 2012-06-01 | Air compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202612060U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515495A (en) * | 2015-12-10 | 2016-04-20 | 镇江市高等专科学校 | Variable-frequency motor control method |
| CN110608160A (en) * | 2019-09-05 | 2019-12-24 | 上海泾铎科技有限公司 | Control method and device for main motor of air compressor set |
-
2012
- 2012-06-01 CN CN 201220255830 patent/CN202612060U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515495A (en) * | 2015-12-10 | 2016-04-20 | 镇江市高等专科学校 | Variable-frequency motor control method |
| CN110608160A (en) * | 2019-09-05 | 2019-12-24 | 上海泾铎科技有限公司 | Control method and device for main motor of air compressor set |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20180601 |