CN203146293U - Air compressor control system - Google Patents
Air compressor control system Download PDFInfo
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- CN203146293U CN203146293U CN 201320119075 CN201320119075U CN203146293U CN 203146293 U CN203146293 U CN 203146293U CN 201320119075 CN201320119075 CN 201320119075 CN 201320119075 U CN201320119075 U CN 201320119075U CN 203146293 U CN203146293 U CN 203146293U
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- air compressor
- contactor
- circuit breaker
- control system
- eps
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Abstract
The utility model discloses an air compressor control system. The air compressor control system comprises a control system composed of a first alternating current power source, a main contactor and a main motor. The air compressor control system further comprises a first power supply loop and a second power supply loop, wherein the first power supply loop is composed of the first alternating current power source, a first air circuit breaker and a fourth contactor, the second power supply loop is composed of a second alternating current power source, a second air circuit breaker and a fifth contactor, and the output side of the fourth contactor and the output side of the fifth contactor are connected with the input side of a fourth air circuit breaker and the input side of an EPS charging module respectively. The output side of the fourth air circuit breaker is connected with the alternating current input side of a frequency converter, and the output side of the frequency converter is respectively connected with the main contactor and the main motor. The output side of the EPS charging module is connected with the charging input end of an EPS storage battery through a third air circuit breaker, and the output end of the EPS storage battery is connected with the direct current input side of the frequency converter. The air compressor control system is started at low frequency, an air compressor operates stably, service life of equipment is long, and energy is saved. When a power failure situation occurs, the EPS power source supplies electricity, and the air compressor can still operate.
Description
Technical field
The utility model relates to a kind of control system, relates in particular to a kind of air compressor control system.
Background technique
At carbonyl iron and carbonyl nickel production line, because the scene has many as toxic and harmfuls such as CO, carbonyl compounds, therefore the production operation employee need wear the long tube breathing mask during operation at the scene, and long tube respiratory surface mask need have air compressor that breathing wind is provided, so air compressor is visual plant.
What existing air compressor adopted is import equipment, and its control system provides for compressor producer is complete.The Starting mode of air compressor motor is that star-triangular pattern starts, and after the air compressor operation, according to the aperture of the size adjustment inlet valve of outlet pressure, inlet valve is by Guan Zhikai, the air compressor increment of load; Inlet valve is by driveing to the pass air compressor off-load.By this increment of load frequently and off-load operation, reach the purpose of regulating the air compressor gas output.
As shown in Figure 2, be original air compressor control system schematic representation, get the input side that three-phase alternating-current supply inserts the main contactor KM1 of air compressor master motor, again through overtemperature relay FR insert air compressor master motor M input side (U1, V1, W1).When starting air compressor master motor M, main contactor KM1 closure, the 3rd contactor KM3 contactor closure, (U2, W2 V2) constitute star-like loop through the 3rd contactor KM3 to the outlet side of air compressor master motor M.After the normal operation of air compressor master motor, the 3rd contactor KM3 disconnects, the second contactor KM2 closure, and (U2, W2 V2) constitute the trigonometric form loop through the second contactor KM2 to air compressor master motor M outlet side.When the situation of motor appearance overload, by overtemperature relay relay FR cutoff circuit, motor is protected.
Mainly there is following shortcoming in this control mode:
1. though star-triangle start mode has limited inrush current to a certain extent, because the air compressor power of motor is bigger, still can cause the fluctuation of voltage during startup.
2. air compressor unloads and increment of load frequently, makes the equipment can not smooth running, stable air pressure and tolerance can not be provided, and can cause the fluctuation of electric current, and the stability of electrical network is produced certain influence; Can be with System noise when unloading and increment of load.
3. when air compressor unloaded to zero load, motor still in idle running, can cause electric energy loss to a certain extent.
4. when the abnormal conditions that have a power failure occurring, air compressor can't influence ordinary production for the site operation personnel provides breathing wind after shutting down.
The model utility content
The purpose of this utility model is to provide a kind of and makes air compressor operate steadily, save energy consumption, the air compressor control system of standby power supply is arranged.
For achieving the above object, the technological scheme taked of the utility model is:
A kind of air compressor control system, comprise the control system of being formed by first ac power supply, main contactor and main motor, also comprise first current supply circuit of being formed by first ac power supply, first air circuit breaker and the 4th contactor, by second current supply circuit that second ac power supply, second air circuit breaker and the 5th contactor are formed, the outlet side of described the 4th contactor and the 5th contactor is connected with the input side of the 4th air circuit breaker and the input side of EPS charging module respectively; The outlet side of described the 4th air circuit breaker is connected with the input side that exchanges of frequency variator, and the outlet side of described frequency variator is connected with main motor with described main contactor respectively; The outlet side of described EPS charging module is connected by the charging input end of the 3rd air circuit breaker with the EPS storage battery, and the output terminal of described EPS storage battery is connected with the direct current input side of described frequency variator.
Described frequency variator is the AC/DC frequency variator.
Adopt air compressor control system of the present utility model, owing to increased frequency variator newly, the variable frequency starting mode is the low-frequency start air compressor, after the air compressor operation is normal, regulate the rotating speed of the motor of air compressor again by frequency variator, regulate compressed-air actuated tolerance and the air pressure supplied, increment of load, the off-load mode of the original adjusting tolerance of compressor have been changed, ensure the smooth running of air compressor, prolong the working life of equipment, save electric energy.In addition, the EPS power supply power supply that increases newly, under the normal condition, air compressor adopts ac power supply, when power-off condition occurring, adopts the power supply of EPS power supply, and air compressor still can move a period of time, for the site operation personnel provides breathing wind.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation before improving.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing thereof, the utility model is described in further detail, but mode of execution of the present utility model is not limited thereto.
As shown in Figure 1, the air compressor control system that the utility model provides, comprise by the main contactor KM1 of first ac power supply 1, air compressor master motor and the control system that main motor M is formed, also comprise first current supply circuit of being formed by first ac power supply 1, the first air circuit breaker QF1 and the 4th contactor KM4, second current supply circuit of being formed by second ac power supply 2, the second air circuit breaker QF2 and the 5th contactor KM5.The outlet side of the 4th contactor KM4 and the 5th contactor KM5, with the input side of the 4th air circuit breaker QF4 and EPS charging mould, 3 input side is connected respectively; (L1, L2's input side that exchanges of the outlet side of the 4th air circuit breaker QF4 and frequency variator 5 L3) are connected, and the outlet side of frequency variator 5 is connected with main motor M with main contactor KM1 respectively; The outlet side of EPS charging module 3 is connected with the charging input end of EPS storage battery 4 by the 3rd air circuit breaker QF3, and the output terminal of EPS storage battery 4 is connected with the direct current input side of frequency variator 5.
Get the two-way ac power supply from electrical network, in first current supply circuit, first ac power supply 1 inserts the input side of the first air circuit breaker QF1, and the outlet side of the first air circuit breaker QF1 is connected with the input side of the 4th contactor KM4.In second current supply circuit, second ac power supply 2 inserts the input side of the second air circuit breaker QF2, and the outlet side of the second air circuit breaker QF2 is connected with the input side of the 5th contactor KM5.
EPS full name Emergency Power Supply(emergency power is supplied with), mainly partly formed by input-output unit, charging module, battery pack, inverter, monitoring unit, output COMM communication etc.
Under the normal condition, closed a floodgate the 4th contactor KM4 closure by the first air circuit breaker QF1.When the 4th air circuit breaker QF4 closure, first ac power supply 1 provides output by frequency variator 5 for air compressor master motor M; When the 3rd air circuit breaker QF3 was closed, second ac power supply 2 was 4 chargings of EPS storage battery, when EPS storage battery 4 is full of electricity, disconnects the 3rd air circuit breaker QF3.When the abnormal conditions power failure appears in first current supply circuit, by the EPS controller by COMM communication to the second current supply circuit, the second air circuit breaker QF2 closure, the 5th contactor KM5 closure, the 3rd air circuit breaker QF3 and the 4th air circuit breaker QF4 keep original closed state, guarantee that the output of air compressor master motor power and 4 chargings of EPS storage battery are uninterrupted.
There is interlocked relationship between the 4th contactor KM4 and the 5th contactor KM5, when one of them contactor is closed, the automatic disconnection of another one contactor.Behind Ac Dump or voltage exceed supply district, the EPS controller switches to the EPS storage battery power supply by COMM communication immediately with the Alternating Current Power Supply state, for air compressor provides emergency service, make air compressor master motor M continue operation, till EPS exhaustion of the accumulators electric weight, the EPS storage battery generally can provide 30～60 minutes power supply.When the service restoration of ac power supply just often, switch to ac power supply again by the EPS controller.After adopting the power supply of double circuit power supply and EPS power supply, guaranteed persistency and the stability of air compressor power supply.
During normal the startup, air compressor master motor M has reduced inrush current by frequency variator 5 low-frequency starts, when reducing to start to the impact of electrical network.Pass through to regulate the frequency of frequency variator 5 during the air compressor proper functioning, change air compressor master rotating speed of motor, thereby reach the size of regulating the air compressor load, air compressor need not just can be realized adjusting to tolerance and air pressure by increment of load mode and off-load mode, can realize constant tolerance output as constant frequency.
The air compressor control system that adopts the utility model to provide possesses following advantage:
1. adopt Frequency Converter Control to realize the soft start of air compressor, start steadily.
2. make air compressor without increment of load and off-load, realize going out the adjusting of atmospheric pressure and tolerance, air compressor is operated steadily, prolong the working life of equipment.
3. guarantee that supply gas pressure is constant, has improved quality of filling gas.
4. under power-off condition, air compressor still can be worked a period of time, for the site operation personnel provides breathing wind.
5. save the part electric energy, and significantly reduced the noise of air compressor operation.
Above-described only is preferred embodiment of the present utility model, does not limit to the utility model.Should be understood that for the person of ordinary skill of the art, under technology enlightenment provided by the utility model, can also make other equivalent modifications and improvement, all can realize the purpose of this utility model, all should be considered as protection domain of the present utility model.
Claims (2)
1. air compressor control system, comprise by first ac power supply (1), the control system that main contactor (KM1) and main motor (M) are formed, it is characterized in that, also comprise by first ac power supply (1), first current supply circuit that first air circuit breaker (QF1) and the 4th contactor (KM4) are formed, by second ac power supply (2), second current supply circuit that second air circuit breaker (QF2) and the 5th contactor (KM5) are formed, the outlet side of described the 4th contactor (KM4) and the 5th contactor (KM5) is connected with the input side of the 4th air circuit breaker (QF4) and the input side of EPS charging module (3) respectively; The outlet side of described the 4th air circuit breaker (QF4) is connected with the input side that exchanges of frequency variator (5), and the outlet side of described frequency variator (5) is connected with main motor (M) with described main contactor (KM1) respectively; The outlet side of described EPS charging module (3) is connected by the charging input end of the 3rd air circuit breaker (QF3) with EPS storage battery (4), and the output terminal of described EPS storage battery (4) is connected with the direct current input side of described frequency variator (5).
2. according to the described air compressor control system of claim 1, it is characterized in that described frequency variator (5) is the AC/DC frequency variator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320119075 CN203146293U (en) | 2013-03-15 | 2013-03-15 | Air compressor control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320119075 CN203146293U (en) | 2013-03-15 | 2013-03-15 | Air compressor control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203146293U true CN203146293U (en) | 2013-08-21 |
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ID=48973824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320119075 Expired - Fee Related CN203146293U (en) | 2013-03-15 | 2013-03-15 | Air compressor control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203146293U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900194A (en) * | 2014-03-13 | 2014-07-02 | 美的集团股份有限公司 | Variable frequency air conditioner and intelligent unit high-frequency starting control method and system of variable frequency air conditioner |
-
2013
- 2013-03-15 CN CN 201320119075 patent/CN203146293U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900194A (en) * | 2014-03-13 | 2014-07-02 | 美的集团股份有限公司 | Variable frequency air conditioner and intelligent unit high-frequency starting control method and system of variable frequency air conditioner |
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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: 20130821 Termination date: 20190315 |