CN211820028U - Fan frequency conversion control system - Google Patents
Fan frequency conversion control system Download PDFInfo
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- CN211820028U CN211820028U CN201922035165.3U CN201922035165U CN211820028U CN 211820028 U CN211820028 U CN 211820028U CN 201922035165 U CN201922035165 U CN 201922035165U CN 211820028 U CN211820028 U CN 211820028U
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- fan
- wind pressure
- control system
- converter
- contactor
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Abstract
The utility model discloses a fan frequency conversion control system, including the converter, the output of converter is connected with the input of three contactor respectively, the output of contactor is connected with three motor fan respectively, the contactor is connected with PLC, selects to start by PLC automatic control. The beneficial effects are that: can carry out the selection according to the required wind pressure of production and open and stop a certain motor wherein, normally start 2 motors. When the wind pressure that detects as the wind pressure sensor is less than the wind pressure of setting for the use, add the frequency automatically, when the wind pressure still can't reach after adding the frequency, PLC automatic control starts the third platform, when the wind pressure reaches the upper limit of setting for the use, stop the third fan, and reduce the converter frequency conversion, carry out the constant frequency control, the external world does not use under the condition of the amount of wind, when wind pressure sensor pressure reaches the upper limit of setting for the use, stop every motor in proper order, can practice thrift a large amount of electric power costs like this, can high-efficient use equipment, and the use of converter itself ability protective apparatus.
Description
Technical Field
The utility model relates to a fan system technical field especially relates to a fan frequency conversion control system.
Background
The existing fan is directly controlled by a contactor to start and stop, and because the requirement on the air quantity is high, the original electric control cannot be used for frequency modulation and air pressure increasing and decreasing. When the wind pressure is low, three machines are started on site, and when the wind pressure is high, the number of running machines is reduced, so that the operation mode greatly influences the production efficiency and the system use loss rate, and the service life of a motor and the electric energy loss are influenced by frequent starting.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a fan frequency conversion control system can realize practicing thrift a large amount of electric power costs, can high-efficient use system, and the use of converter ability protection system itself.
The technical scheme of the utility model is realized like this:
the utility model provides a fan frequency conversion control system, includes the converter, the output of converter is connected with the input of three contactor respectively, the output of contactor is connected with three motor fan respectively, the contactor is connected with PLC, selects the start-up by PLC automatic control.
Furthermore, the frequency converter is in communication connection with the PLC through an interface.
Further, the PLC is connected with an upper computer through a modbus communication protocol, and the upper computer is connected with the field control box.
Furthermore, a thermal relay is arranged between the frequency converter and the contactor.
Furthermore, a local remote fan switching control system is arranged between the thermal relay and the frequency converter.
Further, the local remote switching control system of the fan is connected with the fan of the platform motor.
Furthermore, a PLC output selection control signal point is arranged on a coil of the contactor.
The utility model has the advantages that: can carry out the selection according to the required wind pressure of production and open and stop a certain motor wherein, normally start 2 motors. When the wind pressure that detects as the wind pressure sensor is less than the wind pressure of setting for the use, add the frequency automatically, when the wind pressure still can't reach after adding the frequency, PLC automatic control starts the third platform, when the wind pressure reaches the upper limit of setting for the use, stop the third fan, and reduce the converter frequency conversion, carry out the constant frequency control, the external world does not use under the condition of the amount of wind, when wind pressure sensor pressure reaches the upper limit of setting for the use, stop every motor in proper order, can practice thrift a large amount of electric power costs like this, can high-efficient use system, and the use of converter ability protection system itself.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a circuit diagram of a variable frequency control system for a blower;
fig. 2 is a PLC circuit diagram.
In the figure:
1. a frequency converter; 2. a thermal relay; 3. a contactor; 4. a motor fan; 5. a local remote switching control system of the fan; 6. an upper computer; 7. the PLC outputs a selection control signal point.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
According to the utility model discloses an embodiment provides a fan frequency conversion control system.
Referring to fig. 1-2, according to the utility model discloses a fan frequency conversion control system, including converter 1, the output of converter 1 is connected with the input of three contactor 3 respectively, contactor 3's output is connected with three motor fan 4 respectively, contactor 3 is connected with PLC, selects the start-up by PLC automatic control.
In one embodiment, the frequency converter 1 is communicatively connected to the PLC via an interface.
In one embodiment, the PLC is connected to the host computer 6 via a modbus communication protocol, and the host computer 6 is connected to the field control box.
In one embodiment, a thermal relay 2 is provided between the frequency converter 1 and the contactor 3.
In one embodiment, a fan local remote switching control system 5 is arranged between the thermal relay 2 and the frequency converter 1.
In one embodiment, the fan local remote switching control system 5 is connected to 2 motor fans 4.
In one embodiment, a PLC output selection control signal point 7 is provided on the coil of the contactor 3.
In the in-process of concrete implementation, install a 22KW converter 1 additional at 4 anterior segments of three motor fans, carry out one and drag three controls, the pipeline mouth department that the wind pressure was used the scene adds and is equipped with the wind pressure sensor, and wind pressure sensor analog signal introduces PLC and looks over, control, report to the police etc, system power 380V is introduced to the inlet wire of converter 1, 1 outlet wire of converter introduces the top end of three contactor 3, and 3 bottom ends introduce 3 motor systems respectively under the three contactor 3, 3 control signal of contactor are selected by PLC through analog quantity module, digital quantity module conversion control to open and stop a certain motor wherein according to the wind pressure that production required, normally launch 2 motors. When the wind pressure of the wind pressure sensor is smaller than the wind pressure for setting use, the frequency is automatically added, the wind pressure cannot be reached after the frequency is added, the PLC is automatically controlled to start the third machine, when the wind pressure reaches the upper limit of the set use, the third fan is stopped, the frequency of the frequency converter is reduced, the constant frequency control is carried out, the external world does not use the wind volume, when the pressure of the wind pressure sensor reaches the upper limit of the set use, each motor is stopped in sequence, a large amount of electric power cost can be saved, the system can be efficiently used, and the frequency converter can protect the use of the system.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. The utility model provides a fan frequency conversion control system, its characterized in that includes converter (1), the output of converter (1) is connected with the input of three contactor (3) respectively, the output of contactor (3) is connected with three motor fan (4) respectively, contactor (3) are connected with PLC, select by PLC automatic control to start.
2. The fan variable frequency control system according to claim 1, wherein the frequency converter (1) is in communication connection with the PLC through an interface.
3. The fan variable frequency control system according to claim 2, wherein the PLC is connected with an upper computer (6) through a modbus communication protocol, and the upper computer (6) is connected with a field control box.
4. The fan frequency conversion control system according to claim 1, characterized in that a thermal relay (2) is arranged between the frequency converter (1) and the contactor (3).
5. A fan frequency conversion control system according to claim 4, characterized in that a fan local remote switching control system (5) is arranged between the thermal relay (2) and the frequency converter (1).
6. The fan frequency conversion control system according to claim 5, wherein the fan local remote switching control system (5) is connected with 2 motor fans (4).
7. The fan frequency conversion control system according to claim 1, wherein a PLC output selection control signal point (7) is arranged on a coil of the contactor (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922035165.3U CN211820028U (en) | 2019-11-22 | 2019-11-22 | Fan frequency conversion control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922035165.3U CN211820028U (en) | 2019-11-22 | 2019-11-22 | Fan frequency conversion control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211820028U true CN211820028U (en) | 2020-10-30 |
Family
ID=73028128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922035165.3U Active CN211820028U (en) | 2019-11-22 | 2019-11-22 | Fan frequency conversion control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211820028U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113448295A (en) * | 2021-05-14 | 2021-09-28 | 郑州旭飞光电科技有限公司 | Method for switching induced draft fan, processor and storage medium |
-
2019
- 2019-11-22 CN CN201922035165.3U patent/CN211820028U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113448295A (en) * | 2021-05-14 | 2021-09-28 | 郑州旭飞光电科技有限公司 | Method for switching induced draft fan, processor and storage medium |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 230000 Longqiao Town, Lujiang County, Hefei City, Anhui Province Patentee after: Anhui Lujiang Longqiao Mining Co.,Ltd. Address before: 230000 Longqiao Town, Lujiang County, Hefei City, Anhui Province Patentee before: ANHUI PROVINCE LUJIANG LONGQIAO MINING Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |