CN109404325A - A kind of control circuit system of magnetic suspension air blower - Google Patents
A kind of control circuit system of magnetic suspension air blower Download PDFInfo
- Publication number
- CN109404325A CN109404325A CN201811645379.6A CN201811645379A CN109404325A CN 109404325 A CN109404325 A CN 109404325A CN 201811645379 A CN201811645379 A CN 201811645379A CN 109404325 A CN109404325 A CN 109404325A
- Authority
- CN
- China
- Prior art keywords
- circuit
- magnetic suspension
- air blower
- suspension air
- control circuit
- 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.)
- Pending
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- 239000000725 suspension Substances 0.000 title claims abstract description 33
- 238000001816 cooling Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 238000000605 extraction Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 9
- 239000010865 sewage Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009360 aquaculture Methods 0.000 description 1
- 244000144974 aquaculture Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Control Of Multiple Motors (AREA)
Abstract
It include the frequency changer circuit for being used to control magnetic suspension air blower motor speed being made of frequency converter for main devices the invention discloses a kind of control circuit system of magnetic suspension air blower；By small blower and in proper order water pump composition air-cooled water cooling double mode cooling system circuit；The temperature sensing circuit for being used to test disengaging air temperature and motor temperature formed with thermal resistance and thermocouple；The long-range velocity feedback circuits being made of the input of four tunnel modules and AMB controller；The frequency changer circuit, cooling system circuit, step-down rectifying circuit, temperature sensing circuit, long-range velocity feedback circuits are electrically connected with CPU ST60 6ES72881ST60-0AA0 respectively.Revolving speed is controlled using high performance frequency converter, various modes are it can be selected that manipulation is convenient；In such a way that cooling system is combined using air-cooled and water cooling double mode, can effective protection motor, it can be achieved that blower start and stop at any time, cooling effect is high.
Description
Technical field
The present invention relates to magnetic suspension air blower technical field, specially a kind of control circuit system of magnetic suspension air blower
System.
Background technique
Magnetic suspension centrifugal blower is one kind using the turbine plant of magnetic suspension bearing.Its primary structure is air vane
Wheel, which is directly installed on, to be clicked on axis elongated end, and rotor is suspended vertically on active magnetic bearing controller.It does not need to increase
Fast device and shaft coupling, realization are directly driven by high-speed motor, the single machine high-speed centrifugal blower adjusted the speed by frequency converter.Such wind
Machine uses integrated design, high-speed motor, frequency converter, magnetic bearing control system and adopts equipped with microprocessor control panel etc.
With integrated design and integrate.Its core is magnetic suspension bearing and magneto technology.
Existing magnetic suspension air blower using extremely wide, in cement, chemical industry, food factory etc., be applied to industrial former
The pneumatic conveying of material, dust, raw-food material；It is mainly used for being aerated to sewage bottom of pond portion in sewage treatment plant, makes at sewage
Biological active matter in reason pond can be contacted sufficiently with the substance in sewage, to achieve the purpose that decontamination；In culture fishery, lead to
It crosses and air is blasted to aquaculture bottom of pond portion, increase oxygen content in pond, increase aquatic products survival rate；Simultaneously also in steel
Industry, textile industry, dairy products processing industry etc. have application.Since magnetic suspension air blower is widely used, it is proposed that a kind of pass
It is used to optimize the application of magnetic suspension air blower in the control circuit system of magnetic suspension air blower.
Summary of the invention
The purpose of the present invention is to provide a kind of control circuit systems of magnetic suspension air blower, are become using high performance ABB
Frequency device controls revolving speed, and various modes are it can be selected that manipulation is convenient；By cooling system using air-cooled and water cooling double mode
In conjunction with mode, can effective protection motor, it can be achieved that blower start and stop at any time, cooling effect is high, to solve above-mentioned background skill
The problem of being proposed in art.
To achieve the above object, the invention provides the following technical scheme:
A kind of control circuit system of magnetic suspension air blower includes
It is the frequency changer circuit for being used to control magnetic suspension air blower motor speed that main devices form by ABB frequency converter；It is logical
Cross small blower and in proper order the cooling system circuit of the air-cooled water cooling double mode of water pump composition；Low pressure is generated after filtering by transformation
The step-down rectifying circuit of DC power supply；The temperature for being used to test disengaging air temperature and motor temperature formed with thermal resistance and thermocouple
Spend detection circuit；The long-range velocity feedback circuits being made of the input of four tunnel modules and AMB controller；And with model CPU
The PLC controller of ST60 6ES72881ST60-0AA0 is the control circuit of main control module；The frequency changer circuit, cooling system
Circuit, step-down rectifying circuit, temperature sensing circuit, long-range velocity feedback circuits respectively with CPU ST606ES72881ST60-
0AA0 is electrically connected.
Preferably, the model 6ES7288-3AR02-0AA0 of the thermal resistance, the model of the thermocouple
6ES7288-3AT04-0AA0。
Preferably, the model 6ES7288-3AE04-0AA0 of four tunnel module input.
Preferably, 485 connections on the frequency changer circuit use 3*0.5mm2Shielded cable.
Preferably, DC+, DC- of the AMB controller are connected in terminal block from D.C. regulated power supply extraction and increase short circuit
Piece.
Preferably, the long-range velocity feedback circuits enter 2 using the 4 of model 6ES7288-3AM06-OAAO and go out analog quantity
Module.
Compared with prior art, the beneficial effects of the present invention are:
1, revolving speed is controlled using high performance ABB frequency converter, various modes are it can be selected that manipulation is convenient.
2, in such a way that cooling system is combined using air-cooled and water cooling double mode, can effective protection motor, it can be achieved that
The start and stop at any time of blower, cooling effect are high.
3, it controls using the remote signal of PLC, can not only be controlled by central control room, if blower breaks down, may be used also
To implement long-distance service debugging.
Detailed description of the invention
Fig. 1 is electric operation control circuit figure of the present invention using ABB frequency converter for magnetic suspension air blower revolving speed.
Fig. 2 is the circuit diagram of magnetic suspension air blower cooling system of the present invention.
Fig. 3 is magnetic suspension air blower control cabinet internal circuit configuration schematic diagram of the present invention.
Fig. 4 is low-voltage power circuit figure of the present invention about magnetic suspension air blower control.
Fig. 5 is the controller circuitry figure of magnetic suspension air blower cooling system of the present invention.
Fig. 6 is magnetic suspension air blower othermohygrometer of the present invention and the circuit diagram that motor temperature detects.
Fig. 7 is magnetic suspension air blower velocity feedback circuits figure of the present invention.
Fig. 8 is magnetic suspension air blower of the present invention starting, halt circuit figure.
Fig. 9 is the electric operation control circuit figure of Air cooler of the present invention and water circulating pump.
Figure 10 is the structural schematic diagram of by-passing valve of the present invention.
Figure 11 is the structural schematic diagram of AMB controller of the present invention.
Figure 12 is the detailed pin configuration schematic diagram of AMB controller of the present invention.
Figure 13 is the schematic diagram of circuit connection structure of T1-T4 of the present invention.
Figure 14 is the schematic diagram of circuit connection structure of T5-T8 of the present invention.
Figure 15 is the schematic diagram of circuit connection structure of K29 of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-15 is please referred to, the present invention provides a kind of technical solution: the control circuit system of the magnetic suspension air blower, including
By the frequency changer circuit for being used to control magnetic suspension air blower motor speed being made of ABB frequency converter for main devices；Pass through side drum
Blower and in proper order the cooling system circuit of the air-cooled water cooling double mode of water pump composition；Low-voltage DC is generated after filtering by transformation
The step-down rectifying circuit in source；The temperature detection for being used to test disengaging air temperature and motor temperature formed with thermal resistance and thermocouple
Circuit；The long-range velocity feedback circuits being made of the input of four tunnel modules and AMB controller；And with model CPU
The PLC controller of ST606ES72881ST60-0AA0 is the control circuit of main control module；The frequency changer circuit, cooling system
Circuit, step-down rectifying circuit, temperature sensing circuit, long-range velocity feedback circuits respectively with CPU ST60 6ES72881ST60-
0AA0 is electrically connected.
Specifically, the model 6ES7288-3AR02-0AA0 of the thermal resistance, the model of the thermocouple
6ES7288-3AT04-0AA0.Pass through the selection of 6ES7288-3AR02-0AA0 and 6ES7288-3AT04-0AA0, temperature detection
Accurately, precision is high.
Specifically, the model 6ES7288-3AE04-0AA0 of four tunnel module input.It can be believed with accurate feedback speed
Number.
Specifically, 485 connections on the frequency changer circuit use 3*0.5mm2Shielded cable.Pass through shielded cable
Design reduces signal interference.
Specifically, DC+, DC- of the AMB controller are connected in terminal block from D.C. regulated power supply extraction and increase short circuit
Piece.
Specifically, the long-range velocity feedback circuits, which enter 2 using the 4 of model 6ES7288-3AM06-OAAO, goes out analog quantity
Module.
When in use, the control circuit system of this magnetic suspension air blower carries out revolving speed using high performance ABB frequency converter
Control, various modes are it can be selected that manipulation is convenient；In such a way that cooling system is combined using air-cooled and water cooling double mode, energy
Enough effective protection motors, it can be achieved that blower start and stop at any time, cooling effect is high；It controls using the remote signal of PLC, not only may be used
It is controlled by central control room, if blower breaks down, long-distance service debugging can also be implemented.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of control circuit system of magnetic suspension air blower, it is characterised in that: include by ABB frequency converter be main devices group
At for controlling the frequency changer circuit of magnetic suspension air blower motor speed；By small blower and in proper order water pump composition air-cooled water
The cooling system circuit of cold double mode；The step-down rectifying circuit of low-voltage dc power supply is generated after filtering by transformation；With thermal resistance
With thermocouple composition for testing the temperature sensing circuit of disengaging air temperature and motor temperature；By the input of four tunnel modules and AMB
The long-range velocity feedback circuits of controller composition；And it is controlled with the PLC of model CPU ST60 6ES72881ST60-0AA0
Device is the control circuit of main control module；The frequency changer circuit, cooling system circuit, step-down rectifying circuit, temperature sensing circuit,
Long-range velocity feedback circuits are electrically connected with CPU ST60 6ES72881ST60-0AA0 respectively.
2. a kind of control circuit system of magnetic suspension air blower according to claim 1, it is characterised in that: the thermal resistance
Model 6ES7288-3AR02-0AA0, the model 6ES7288-3AT04-0AA0 of the thermocouple.
3. a kind of control circuit system of magnetic suspension air blower according to claim 1 or 2, it is characterised in that: described four
The model 6ES7288-3AE04-0AA0 of road module input.
4. a kind of control circuit system of magnetic suspension air blower according to claim 1-3, it is characterised in that: institute
485 connections on frequency changer circuit are stated using 3*0.5mm2Shielded cable.
5. a kind of control circuit system of magnetic suspension air blower according to claim 1, it is characterised in that: the AMB control
DC+, DC- of device processed are connected in terminal block from D.C. regulated power supply extraction and increase short circuit piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811645379.6A CN109404325A (en) | 2018-12-30 | 2018-12-30 | A kind of control circuit system of magnetic suspension air blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811645379.6A CN109404325A (en) | 2018-12-30 | 2018-12-30 | A kind of control circuit system of magnetic suspension air blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109404325A true CN109404325A (en) | 2019-03-01 |
Family
ID=65461714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811645379.6A Pending CN109404325A (en) | 2018-12-30 | 2018-12-30 | A kind of control circuit system of magnetic suspension air blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109404325A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113133428A (en) * | 2021-04-29 | 2021-07-20 | 珠海智旋科技有限公司 | Fan system for aquaculture oxygenation and control method |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201018451Y (en) * | 2007-03-13 | 2008-02-06 | 广东明阳龙源电力电子有限公司 | Variable frequency speed regulation system |
| CN102734197A (en) * | 2012-06-11 | 2012-10-17 | 苏州市职业大学 | FFU (fan filter unit) fan variable-frequency speed regulation controller |
| CN203433387U (en) * | 2013-08-07 | 2014-02-12 | 云南玉溪中汇电力设备有限责任公司 | Piping and instrument diagram (PID)-based frequency-conversion and speed-regulation cooling control system |
| CN204061254U (en) * | 2014-06-09 | 2014-12-31 | 国家电网公司 | Based on the transformer blower fan of PLC VFC |
| CN104329281A (en) * | 2014-10-20 | 2015-02-04 | 东方日立(成都)电控设备有限公司 | Variable frequency energy-saving system for movable blade adjustable type induced draft fan |
| CN204961364U (en) * | 2015-09-01 | 2016-01-13 | 石家庄金士顿轴承科技有限公司 | Air suspension centrifugal fan control system |
| CN206860518U (en) * | 2017-06-08 | 2018-01-09 | 亿昇(天津)科技有限公司 | A kind of magnetic suspension cfentrifugal blower control system based on PLC |
| CN206950386U (en) * | 2017-01-23 | 2018-02-02 | 广东昊翔电气设备工程有限公司 | A kind of vacuum control system |
| CN206977252U (en) * | 2017-05-31 | 2018-02-06 | 株洲中车时代电气股份有限公司 | A kind of electromotor cooling system |
| CN107863917A (en) * | 2017-10-30 | 2018-03-30 | 华润电力（贺州）有限公司 | A kind of variable-frequency motor transformation circuit with cooling blower |
| CN107885158A (en) * | 2017-12-19 | 2018-04-06 | 山东天瑞重工有限公司 | A kind of electrical control gear of high-speed magnetic-suspension centrifugal blower |
| CN108240348A (en) * | 2016-12-25 | 2018-07-03 | 上海梅山钢铁股份有限公司 | Dedusting method for controlling frequency conversion |
| CN207603492U (en) * | 2017-10-30 | 2018-07-10 | 华润电力（贺州）有限公司 | Circuit is transformed in a kind of variable-frequency motor |
| CN108581518A (en) * | 2018-01-17 | 2018-09-28 | 成都飞机工业（集团）有限责任公司 | A kind of negative pressure system and its operation method of vacuum pump |
| CN209261890U (en) * | 2018-12-30 | 2019-08-16 | 河南迪诺环保科技股份有限公司 | A kind of control circuit system of magnetic suspension air blower |
-
2018
- 2018-12-30 CN CN201811645379.6A patent/CN109404325A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201018451Y (en) * | 2007-03-13 | 2008-02-06 | 广东明阳龙源电力电子有限公司 | Variable frequency speed regulation system |
| CN102734197A (en) * | 2012-06-11 | 2012-10-17 | 苏州市职业大学 | FFU (fan filter unit) fan variable-frequency speed regulation controller |
| CN203433387U (en) * | 2013-08-07 | 2014-02-12 | 云南玉溪中汇电力设备有限责任公司 | Piping and instrument diagram (PID)-based frequency-conversion and speed-regulation cooling control system |
| CN204061254U (en) * | 2014-06-09 | 2014-12-31 | 国家电网公司 | Based on the transformer blower fan of PLC VFC |
| CN104329281A (en) * | 2014-10-20 | 2015-02-04 | 东方日立(成都)电控设备有限公司 | Variable frequency energy-saving system for movable blade adjustable type induced draft fan |
| CN204961364U (en) * | 2015-09-01 | 2016-01-13 | 石家庄金士顿轴承科技有限公司 | Air suspension centrifugal fan control system |
| CN108240348A (en) * | 2016-12-25 | 2018-07-03 | 上海梅山钢铁股份有限公司 | Dedusting method for controlling frequency conversion |
| CN206950386U (en) * | 2017-01-23 | 2018-02-02 | 广东昊翔电气设备工程有限公司 | A kind of vacuum control system |
| CN206977252U (en) * | 2017-05-31 | 2018-02-06 | 株洲中车时代电气股份有限公司 | A kind of electromotor cooling system |
| CN206860518U (en) * | 2017-06-08 | 2018-01-09 | 亿昇(天津)科技有限公司 | A kind of magnetic suspension cfentrifugal blower control system based on PLC |
| CN107863917A (en) * | 2017-10-30 | 2018-03-30 | 华润电力（贺州）有限公司 | A kind of variable-frequency motor transformation circuit with cooling blower |
| CN207603492U (en) * | 2017-10-30 | 2018-07-10 | 华润电力（贺州）有限公司 | Circuit is transformed in a kind of variable-frequency motor |
| CN107885158A (en) * | 2017-12-19 | 2018-04-06 | 山东天瑞重工有限公司 | A kind of electrical control gear of high-speed magnetic-suspension centrifugal blower |
| CN108581518A (en) * | 2018-01-17 | 2018-09-28 | 成都飞机工业（集团）有限责任公司 | A kind of negative pressure system and its operation method of vacuum pump |
| CN209261890U (en) * | 2018-12-30 | 2019-08-16 | 河南迪诺环保科技股份有限公司 | A kind of control circuit system of magnetic suspension air blower |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113133428A (en) * | 2021-04-29 | 2021-07-20 | 珠海智旋科技有限公司 | Fan system for aquaculture oxygenation and control method |
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