CN203161594U - Fan control system for power/variable frequency switching of high-voltage frequency converter - Google Patents
Fan control system for power/variable frequency switching of high-voltage frequency converter Download PDFInfo
- Publication number
- CN203161594U CN203161594U CN 201320029422 CN201320029422U CN203161594U CN 203161594 U CN203161594 U CN 203161594U CN 201320029422 CN201320029422 CN 201320029422 CN 201320029422 U CN201320029422 U CN 201320029422U CN 203161594 U CN203161594 U CN 203161594U
- Authority
- CN
- China
- Prior art keywords
- control system
- high voltage
- voltage converter
- ventilation door
- power
- 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
Links
Images
Landscapes
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The utility model discloses a fan control system for power/variable frequency switching of a high-voltage frequency converter. The fan control system comprises a control system and a ventilation door regulator, wherein the control system is connected with the high-voltage frequency converter, and the ventilation door regulator is arranged between the control system and a fan ventilation door. The control system is used for receiving running signals transmitted by the high-voltage frequency converter and forwarding control signals of ventilation door opening to the ventilation door regulator, wherein the control signals of the ventilation door opening are transmitted by the high-voltage frequency converter. The ventilation door regulator utilizes the control signals of the ventilation door opening to control the opening of the ventilation door. When the frequency converter performs the power/variable frequency switching, the control signals of the ventilation door opening are used for controlling the opening of the ventilation door, wherein the control signals of the ventilation door opening are forwarded to the ventilation door regulator by a DCS system, so that air supply quantity output when power frequency is performed is identical to air supply quantity output when variable frequency is performed. The air supply quantity is stable. The situations that a boiler is exploded or damaged due to flameout or excessive negative pressure of the boiler are avoided.
Description
Technical field
The utility model relates to a kind of control gear of blower fan, is specifically related to a kind of high voltage converter worker/frequency conversion blower fan control system when switching.
Background technique
Blower fan is that China compresses gas and the custom of gas conveying machinery is called for short, and usually said blower fan comprises ventilator, blower, wind-driven generator etc.Gas compression and gas conveying machinery are that the mechanical energy of rotating is converted to gas pressure energy and kinetic energy, and the machinery that gas is transferred out.The main structural components of blower fan is impeller, casing, intake grill, support, motor, belt pulley, coupling, baffler, driving component etc.
In industrial production and product processing manufacturing industry, Fan Equipment has wide range of applications; Its power consumption and account for 7%～25% of cost of production such as restriction loss and the maintenance, repair expense of valve, baffle plate relevant device is a no small operating cost spending.Along with deepening continuously of economic reform, the continuous aggravation of market competition, energy-saving and cost-reducing one of the important means that reduces production costs, improves the quality of products that become already.
At present, variable-frequency control technique has become a main developing direction of Modern Electrical Drive technology.The high-power field that 6kV is above need utilize high voltage converter that motor is carried out frequency modulation, pressure regulation.High voltage converter can realize that because it has stepless time adjustment, change conventional motors are intelligent electric machine, the considerable energy saving benefit, inrush current can be controlled in rated current with interior, non-impact current, impact little to electrical network, reduce advantages such as mechanical wear, saving maintenance cost, be widely used in industries such as metallurgy, petrochemical industry, electric power, mining, urban construction and transportation industries.
Based on speed adjusting performance and the power savings of above-mentioned high voltage converter, using the occasion of blower fan, often the motor with blower fan is connected with high voltage converter, and the output speed of regulating motor by the output frequency of change high voltage converter is with the wind supply quantity of adjusting blower fan.When but existing apparatus breaks down at high voltage converter, by breakdown switch signal of high voltage converter output, cut off frequency variator rear end contactor, and closed power frequency contactor, continued the motor of fan by the power frequency contactor and power, guarantee that motor remains in operation.But in the high voltage converter fault-free, when normally moving, the air door of blower fan is all opened, and reduces output frequency by high voltage converter, makes the motor low-speed running of blower fan, guarantees the wind supply quantity just-in-time.In the air feed process, if high voltage converter breaks down, high voltage converter can switch to power frequency output by frequency conversion output by bypath system, be the motor of blower fan directly by mains supply, motor will very fast from the low frequency change of state to the high frequency state this moment, owing to the wind supply quantity of blower fan and rotating speed of motor square are directly proportional, along with rotating speed of motor strengthens fast, then wind supply quantity increases thereupon fast, may cause flame-outly or negative pressure is excessive by the boiler of blower fan air feed, causes the bursting of boilers or damage.
Summary of the invention
The utility model purpose provides a kind of high voltage converter worker/frequency conversion blower fan control system when switching, when high voltage converter worker/frequency conversion was switched, blower fan was stable to the wind supply quantity of boiler, avoided boiler flame-out or the excessive bursting of boilers that causes of negative pressure or damage.
For achieving the above object, the technical solution adopted in the utility model is: blower fan control system when a kind of high voltage converter worker/frequency conversion is switched comprises the control system that is connected with high voltage converter, is located at the damper regulator between described control system and the air door of fan;
Wherein, described control system is used for receiving the run signal that described high voltage converter sends, and transmits the throttle opening control signal of being sent by high voltage converter to described damper regulator;
Described damper regulator utilizes described throttle opening control signal to control the aperture of described air door of fan.
In the technique scheme, the power frequency operation signal when the converting operation signal when described run signal comprises described high voltage converter frequency conversion output and power frequency output.
Preferably, described control system is the DCS system.
In the technique scheme, described throttle opening control signal is the analogue signal of 4～20mA.
Control principle of the present utility model is as described below:
When (1) high voltage converter normally moves, and according to required wind supply quantity adjustment output frequency, control rotating speed of motor;
(2) high voltage converter is to the analogue signal of a 4～20mA of DCS system output, throttle opening control signal as blower fan, wherein, when the high voltage converter frequency conversion is exported, send the converting operation signal to the DCS system, the DCS system only stores this throttle opening control signal, does not regulate it to air door and transmits this throttle opening control signal;
When (3) high voltage converter breaks down, switch to power frequency output manually or automatically, and send the power frequency operation signal to the DCS system, the DCS system transmits the throttle opening control signal to damper regulator then, regulate the aperture of air door of fan baffle plate, the wind supply quantity when guaranteeing the output of high voltage converter power frequency is identical with the wind supply quantity of frequency conversion output;
(4) after the high voltage converter fault is eliminated, switch to frequency conversion output manually or automatically, and send the analogue signal of 20mA to the DCS system, converting operation signal as high voltage converter, the DCS system transmits the throttle opening control signal to damper regulator then, regulate the aperture to 100% of air door of fan baffle plate, the wind supply quantity when guaranteeing high voltage converter frequency conversion output is identical with the wind supply quantity of power frequency output.
Because technique scheme is used, the advantage that the utility model compared with prior art has is:
1. the utility model is when high voltage converter worker/frequency conversion is switched, the throttle opening control signal of utilizing the DCS system to transmit to damper regulator is controlled the aperture of air door of fan, wind supply quantity when making power frequency output is identical with the wind supply quantity of frequency conversion output, wind supply quantity is stable, avoids boiler flame-out or the excessive bursting of boilers that causes of negative pressure or damage.
Description of drawings
Fig. 1 is the utility model embodiment one control principle figure;
Wherein: 1, high voltage converter; 2, DCS system; 3, damper regulator; 4, air door of fan.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment one: referring to shown in Figure 1, blower fan control system when a kind of high voltage converter worker/frequency conversion is switched comprises the control system that is connected with high voltage converter 1, is located at the damper regulator 3 between described control system 2 and the air door of fan 4.
In the present embodiment, described control system is selected DCS system 2 for use.
Wherein, described DCS system 2 is used for receiving the run signal that described high voltage converter 1 sends, and transmit the throttle opening control signal of being sent by high voltage converter 1 to described damper regulator 3, preferred, described throttle opening control signal is the analogue signal of 4～20mA.
Described damper regulator 3 utilizes described throttle opening control signal to control the aperture of described air door of fan 4.
Power frequency operation signal when the converting operation signal when described run signal comprises described high voltage converter frequency conversion output and power frequency output.
The control principle of present embodiment is as described below:
When (1) high voltage converter normally moves, and according to required wind supply quantity adjustment output frequency, control rotating speed of motor;
(2) high voltage converter is to the analogue signal of a 4～20mA of DCS system output, throttle opening control signal as blower fan, wherein, when the high voltage converter frequency conversion is exported, send the converting operation signal to the DCS system, the DCS system only stores this throttle opening control signal, does not regulate it to air door and transmits this throttle opening control signal;
When (3) high voltage converter breaks down, switch to power frequency output manually or automatically, and send the power frequency operation signal to the DCS system, the DCS system transmits the throttle opening control signal to damper regulator then, regulate the aperture of air door of fan baffle plate, the wind supply quantity when guaranteeing the output of high voltage converter power frequency is identical with the wind supply quantity of frequency conversion output;
(4) after the high voltage converter fault is eliminated, switch to frequency conversion output manually or automatically, and send the analogue signal of 20mA to the DCS system, converting operation signal as high voltage converter, the DCS system transmits the throttle opening control signal to damper regulator then, regulate the aperture to 100% of air door of fan baffle plate, the wind supply quantity when guaranteeing high voltage converter frequency conversion output is identical with the wind supply quantity of power frequency output.
The above is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. blower fan control system when a high voltage converter worker/frequency conversion is switched is characterized in that, comprises the control system that is connected with high voltage converter, is located at the damper regulator between described control system and the air door of fan;
Wherein, described control system is used for receiving the run signal that described high voltage converter sends, and transmits the throttle opening control signal of being sent by high voltage converter to described damper regulator;
Described damper regulator utilizes described throttle opening control signal to control the aperture of described air door of fan.
2. blower fan control system when high voltage converter worker according to claim 1/frequency conversion is switched is characterized in that, the power frequency operation signal when the converting operation signal when described run signal comprises described high voltage converter frequency conversion output and power frequency output.
3. blower fan control system when high voltage converter worker according to claim 1/frequency conversion is switched is characterized in that described control system is the DCS system.
4. blower fan control system when high voltage converter worker according to claim 1/frequency conversion is switched is characterized in that described throttle opening control signal is the analogue signal of 4～20mA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320029422 CN203161594U (en) | 2013-01-21 | 2013-01-21 | Fan control system for power/variable frequency switching of high-voltage frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320029422 CN203161594U (en) | 2013-01-21 | 2013-01-21 | Fan control system for power/variable frequency switching of high-voltage frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203161594U true CN203161594U (en) | 2013-08-28 |
Family
ID=49022781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320029422 Expired - Fee Related CN203161594U (en) | 2013-01-21 | 2013-01-21 | Fan control system for power/variable frequency switching of high-voltage frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203161594U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047166A (en) * | 2013-01-21 | 2013-04-17 | 江苏力普电子科技有限公司 | Blower control system during power frequency/frequency conversion switching of high-voltage frequency converter |
| CN103674469A (en) * | 2013-12-13 | 2014-03-26 | 湖南科技大学 | Experimental method for coupling pipe network operating characteristics of mine fans and device thereof |
| CN104295516A (en) * | 2014-08-08 | 2015-01-21 | 大唐三门峡发电有限责任公司 | Application of automatic switching mode of frequency converter of power station |
| CN106774484A (en) * | 2017-04-04 | 2017-05-31 | 河北德润泽化工设备有限公司 | Tiny structure automaton in a kind of potassium sulfate reative cell based on DCS |
-
2013
- 2013-01-21 CN CN 201320029422 patent/CN203161594U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047166A (en) * | 2013-01-21 | 2013-04-17 | 江苏力普电子科技有限公司 | Blower control system during power frequency/frequency conversion switching of high-voltage frequency converter |
| CN103674469A (en) * | 2013-12-13 | 2014-03-26 | 湖南科技大学 | Experimental method for coupling pipe network operating characteristics of mine fans and device thereof |
| CN103674469B (en) * | 2013-12-13 | 2016-07-06 | 湖南科技大学 | The experimental technique of mine fan coupling pipe network operation characteristic and device thereof |
| CN104295516A (en) * | 2014-08-08 | 2015-01-21 | 大唐三门峡发电有限责任公司 | Application of automatic switching mode of frequency converter of power station |
| CN106774484A (en) * | 2017-04-04 | 2017-05-31 | 河北德润泽化工设备有限公司 | Tiny structure automaton in a kind of potassium sulfate reative cell based on DCS |
| CN106774484B (en) * | 2017-04-04 | 2023-08-29 | 河北德润泽化工设备有限公司 | DCS-based automatic control method for micro negative pressure in potassium sulfate reaction chamber |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203161594U (en) | Fan control system for power/variable frequency switching of high-voltage frequency converter | |
| CN104329281A (en) | Variable frequency energy-saving system for movable blade adjustable type induced draft fan | |
| CN103277871B (en) | Outdoor fan of air-conditioner speed-regulating control device | |
| CN112228381B (en) | Variable-frequency movable blade coordination control method for movable blade adjustable fan | |
| CN104948490A (en) | Dust removal fan constant-air-pressure frequency control system and method | |
| CN203933343U (en) | A kind of novel permanent magnetic eddy current coupled speed regulator | |
| CN201407155Y (en) | Intelligent energy-saving control device for air compressor | |
| CN204476822U (en) | Axial flow movable vane regulates the speed control system of blower fan | |
| CN103047166A (en) | Blower control system during power frequency/frequency conversion switching of high-voltage frequency converter | |
| CN201573951U (en) | Oil motor speed regulating belt feeder | |
| CN205064334U (en) | Dust exhausting fan energy -saving control cabinet | |
| CN105465029A (en) | Air blower variable-frequency control device based on power frequency motor and control method for air blower variable-frequency control device | |
| CN201594195U (en) | Constant-pressure water supply control device | |
| CN201976067U (en) | Variable frequency control device of fan | |
| CN204985009U (en) | Frequency converter device of adjustable draught fan of movable vane | |
| CN202612163U (en) | Fan variable frequency speed control system based on programmable logic controller (PLC) | |
| CN201623688U (en) | Coal mine fan variable frequency control energy-saving device | |
| CN201347875Y (en) | Control system of cooling tower fan | |
| CN202004721U (en) | Variable-frequency energy-saving system of air cabinet | |
| CN201669163U (en) | Voltage controlling device for electric dust collector | |
| CN201594807U (en) | Pumping unit speed regulating and dragging device | |
| CN203336766U (en) | Speed control device for outdoor fan of air conditioner | |
| CN205119183U (en) | Oil smoke discharges and purifies intelligent frequency conversion electrical system | |
| CN204164015U (en) | A kind of adjusting rotor blade formula induced draught fan frequency conversion energy-saving system | |
| CN205423125U (en) | Variable frequency speed regulating system of air compressor machine |
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: 20130828 Termination date: 20170121 |