CN104660147A - Variable-frequency control circuit for fan - Google Patents
Variable-frequency control circuit for fan Download PDFInfo
- Publication number
- CN104660147A CN104660147A CN201410698439.6A CN201410698439A CN104660147A CN 104660147 A CN104660147 A CN 104660147A CN 201410698439 A CN201410698439 A CN 201410698439A CN 104660147 A CN104660147 A CN 104660147A
- Authority
- CN
- China
- Prior art keywords
- frequency converter
- loop
- signal
- motor
- control
- 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
Links
Landscapes
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention relates to a variable-frequency control circuit for a fan. The control circuit comprises a power loop and a control loop, wherein the power loop comprises a frequency converter and a motor M, three terminals U, V and W of the frequency converter are respectively connected with the corresponding three phases of the motor M, three binding posts R, S and T of the frequency converter are respectively connected with three phases R, S and T of a power supply, the phases R and S of the power supply are connected with a fuse FU1, a transformer and a fuse FU2 in series, and the other end of the transformer is connected with the control loop through a connecting circuit. The variable-frequency control circuit has the advantages of balancing the actual demand and the actual supply of an air supply system, saving energy, reducing emission and protecting environments.
Description
Technical field
The present invention relates to a kind of control circuit, particularly a kind of fan frequency conversion control circuit.
Background technology
In the variable frequency control of the blower fan of normal shipboard, general is all employing one simple start-stop control loop across-the-line starting blower fan, but the weak point of this control mode is: under different equipment working conditions, required ventilation quantity is different, if by directly simple start-stop control, then that motor, all the time in oepration at full load, adds energy consumption and pollution regardless of actual demand air quantity.
Summary of the invention
The object of the invention is to overcome above deficiency, a kind of actual demand amount and the effective supply amount balance that can reach air feed system being provided, reaching energy-saving and emission-reduction, the fan frequency conversion control circuit of protection of the environment.
Object of the present invention is achieved through the following technical solutions: a kind of fan frequency conversion control circuit, and described control circuit comprises power loop and control loop;
Described power loop comprises frequency converter, motor M, the three-phase that U, V, W tri-terminals of described frequency converter are corresponding with motor M is respectively connected, described frequency converter R, S, T tri-binding post access three-phase R, S, T of power supply respectively, the R of described power supply, S-phase are in series with fuse FU1, transformer and fuse FU2, and the other end of transformer is connected by the first circuit of connecting circuit and control loop, second circuit;
Described control loop is for controlling starting and the stopping of motor;
When after outer access three phase mains, provide power supply to control loop by the secondary limit of transformer, contactor KM1 and time relay KT2 action, the KM1 in power loop connects, and provides power supply to frequency converter, and time delay is after 5 seconds, and in power loop, KT2 closes;
In control loop, by closed initiating signal, relay K 2 action, in power loop, K2 closes, electric motor starting, and feedback signal makes control loop repeat circuit K3 action, motor run indicator is bright, bring into operation timing simultaneously, and frequency converter is by collecting temperature signal or pressure signal, and the frequency of regulable control frequency converter is to reach actual demand amount and the effective supply amount balance of air feed or exhausting system;
In control loop, by closed stop signal, relay K 1 action, the power supply of block system relay K2, relay K 2 dead electricity, series reaction, motor stops.
Further improvement of the present invention is: described frequency converter is also provided with the signal picker be connected with differential pressure pickup, temperature sensor.
Further improvement of the present invention is: described frequency converter is also provided with signal feedback device, described signal feedback device be used for will the signal feedback that collect to control system.
The present invention compared with prior art has the following advantages:
1, differential pressure pickup, temperature sensor and Frequency Converter Control is increased;
2, for air feed system, gathered the air pressure difference signal of engine room inside and nacelle exterior by differential pressure pickup, balance with the actual demand amount and effective supply amount that reach air feed system by the frequency of this signal by PID regulable control frequency converter;
3, for exhausting system, compared by the temperature value of the temperature signal and expection setting that gather engine room inside, equally by the frequency of PID regulable control frequency converter to reach expection design temperature;
4, after increasing frequency converter, the power output of motor just can export according to the demand of reality completely, reaches energy-saving and emission-reduction, the object of protection of the environment.
accompanying drawing illustrates:
Fig. 1 is the circuit diagram of power loop of the present invention;
Fig. 2 is the circuit diagram of the first circuit;
Fig. 3 is the circuit diagram of second circuit;
Number in the figure: 1-power loop, 2-first circuit, 3-frequency converter, 4-motor M, 5-power supply, 6-fuse FU1,7-transformer, 8-fuse FU2,9-signal picker, 10-signal feedback device, 11-second circuit.
embodiment:
In order to deepen the understanding of the present invention, below in conjunction with embodiment and accompanying drawing, the invention will be further described, and this embodiment only for explaining the present invention, does not form limiting the scope of the present invention.
As Fig. 1 to Fig. 3 shows the embodiment of a kind of fan frequency conversion control circuit of the present invention, described control circuit comprises power loop 1 and control loop;
Described power loop 1 comprises frequency converter 3, motor M 4, the three-phase that U, V, W tri-terminals of described frequency converter 3 are corresponding with motor M 4 is respectively connected, described frequency converter 3 R, S, T tri-binding post access three-phase R, S, T of power supply 5 respectively, the R of described power supply 5, S-phase are in series with fuse FU1, transformer 7 and fuse FU2, and the other end of transformer 7 is connected by the first circuit 10 of connecting circuit and control loop, second circuit 11;
Described control loop is for controlling starting and the stopping of motor.
Described control circuit principle is as follows:
When after outer access three phase mains, provide power supply to control loop by the secondary limit of transformer, time relay KT1 action, time delay is after 5 seconds, contactor KM1 and time relay KT2 action, and the KM1 in power loop connects, there is provided power supply to frequency converter, time delay is after 5 seconds, and in power loop, KT2 closes;
In control loop, by closed initiating signal, relay K 2 action, in power loop, K2 closes, and electric motor starting, feedback signal makes control loop repeat circuit K3 action, and motor run indicator is bright, and bring into operation timing simultaneously.Frequency converter is by collecting temperature signal or pressure signal, and the frequency of PID regulable control frequency converter is to reach actual demand amount and the effective supply amount balance of air feed or exhausting system;
In control loop, by closed stop signal, relay K 1 action, the power supply of block system relay K2, relay K 2 dead electricity, series reaction, motor stops.
The preferred described frequency converter of the present invention is also provided with the signal picker 9 be connected with differential pressure pickup, temperature sensor, frequency converter is also provided with signal feedback, 10, described signal feedback device 10 for the signal feedback that will collect to control system.
Draught fan control circuit of the present invention, by increasing differential pressure pickup, temperature sensor and Frequency Converter Control, for air feed system, the air pressure difference signal of engine room inside and nacelle exterior is gathered by differential pressure pickup, balance with the actual demand amount and effective supply amount that reach air feed system by the frequency of this signal by PID regulable control frequency converter, for exhausting system, compared by the temperature value of the temperature signal and expection setting that gather engine room inside, the same frequency by PID regulable control frequency converter is to reach expection design temperature, after increasing frequency converter, the power output of motor just can export according to the demand of reality completely, reach energy-saving and emission-reduction, the object of protection of the environment.
The another statement of applicant, the present invention illustrates implementation method of the present invention and apparatus structure by above-described embodiment, but the present invention is not limited to above-mentioned execution mode, does not namely mean that the present invention must rely on said method and structure could be implemented.Person of ordinary skill in the field should understand, any improvement in the present invention, replaces and the interpolation of step, concrete way choice etc., all drop within protection scope of the present invention and scope of disclosure implementation method equivalence selected by the present invention.
The present invention is not limited to above-mentioned execution mode, and all employings and analog structure of the present invention and method thereof realize all modes of the object of the invention, all within protection scope of the present invention.
Claims (3)
1. a fan frequency conversion control circuit, is characterized in that: described control circuit comprises power loop and control loop;
Described power loop comprises frequency converter, motor M, the three-phase that U, V, W tri-terminals of described frequency converter are corresponding with motor M is respectively connected, described frequency converter R, S, T tri-binding post access three-phase R, S, T of power supply respectively, the R of described power supply, S-phase are in series with fuse FU1, transformer and fuse FU2, and the other end of transformer is connected by the first circuit of connecting circuit and control loop, second circuit;
Described control loop is for controlling starting and the stopping of motor;
When after outer access three phase mains, provide power supply to control loop by the secondary limit of transformer, contactor KM1 and time relay KT2 action, the KM1 in power loop connects, and provides power supply to frequency converter, and time delay is after 5 seconds, and in power loop, KT2 closes;
In control loop, by closed initiating signal, relay K 2 action, in power loop, K2 closes, electric motor starting, and feedback signal makes control loop repeat circuit K3 action, motor run indicator is bright, bring into operation timing simultaneously, and frequency converter is by collecting temperature signal or pressure signal, and the frequency of regulable control frequency converter is to reach actual demand amount and the effective supply amount balance of air feed or exhausting system;
In control loop, by closed stop signal, relay K 1 action, the power supply of block system relay K2, relay K 2 dead electricity, series reaction, motor stops.
2. fan frequency conversion control circuit according to claim 1, is characterized in that: described frequency converter is also provided with the signal picker be connected with differential pressure pickup, temperature sensor.
3. fan frequency conversion control circuit according to claim 1, is characterized in that: described frequency converter is also provided with signal feedback device, and the signal feedback that described signal feedback device is used for collecting is to control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410698439.6A CN104660147A (en) | 2014-11-28 | 2014-11-28 | Variable-frequency control circuit for fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410698439.6A CN104660147A (en) | 2014-11-28 | 2014-11-28 | Variable-frequency control circuit for fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104660147A true CN104660147A (en) | 2015-05-27 |
Family
ID=53250926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410698439.6A Pending CN104660147A (en) | 2014-11-28 | 2014-11-28 | Variable-frequency control circuit for fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104660147A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201976067U (en) * | 2010-12-13 | 2011-09-14 | 王海平 | Variable frequency control device of fan |
| CN202597148U (en) * | 2012-04-19 | 2012-12-12 | 重庆飞尔达机械有限责任公司 | Energy-saving electric control device of ventilator |
| RU132395U1 (en) * | 2013-04-09 | 2013-09-20 | Открытое акционерное общество "Всероссийский научно-исследовательский и проектно-конструкторский институт электровозостроения" (ОАО "ВЭлНИИ") | ELECTRIC DRIVE |
-
2014
- 2014-11-28 CN CN201410698439.6A patent/CN104660147A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201976067U (en) * | 2010-12-13 | 2011-09-14 | 王海平 | Variable frequency control device of fan |
| CN202597148U (en) * | 2012-04-19 | 2012-12-12 | 重庆飞尔达机械有限责任公司 | Energy-saving electric control device of ventilator |
| RU132395U1 (en) * | 2013-04-09 | 2013-09-20 | Открытое акционерное общество "Всероссийский научно-исследовательский и проектно-конструкторский институт электровозостроения" (ОАО "ВЭлНИИ") | ELECTRIC DRIVE |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105240302B (en) | Air compressor machine drives intelligent power saving all-in-one machine and its method | |
| CN103216867A (en) | Range hood air volume and air pressure compensation system based on variable frequency motor and control method thereof | |
| CN1455193A (en) | Digital direct-current variable frequency air conditioner controller | |
| CN203849623U (en) | Constant-voltage water supply control system | |
| CN203116232U (en) | Air conditioner self-starting device | |
| CN108180602A (en) | A kind of intelligent frequency-conversion switch board and its control method | |
| CN108173473A (en) | A kind of Remote Control System of Industry Devices based on switched reluctance machines | |
| CN201733273U (en) | FFU fan variable-frequency speed-regulating controller | |
| CN103234276A (en) | Control device of domestic intelligent electric control fan heater | |
| CN201374649Y (en) | Power supply circuit and air conditioner provided with same | |
| CN104660147A (en) | Variable-frequency control circuit for fan | |
| CN207454232U (en) | A kind of automatic joint control operation control system of multiple air compressors | |
| CN106482264B (en) | Solar air conditioner based on super capacitor and control method thereof | |
| CN203215815U (en) | Range hood air volume and air pressure compensation system based on variable frequency motor | |
| CN201536332U (en) | Improved intelligent motor soft starter | |
| CN201845206U (en) | Control system on SFU022 type dust removal machine | |
| CN105391148B (en) | A kind of wind-powered electricity generation control circuit | |
| CN204729719U (en) | The intelligent gas control valve device that a kind of factory uses | |
| CN203657144U (en) | Household air-conditioner circuit system using solar energy for auxiliary power supply | |
| CN202424616U (en) | Specially-used power saver for air compression motor | |
| CN203522142U (en) | Motor integrated protector for cold chain | |
| CN202737893U (en) | Smart home environment detection system | |
| CN202652138U (en) | Intelligent energy-saving starter of electric motor | |
| CN201504205U (en) | Intelligent soft-starting, voltage-regulating and energy-saving device of motor | |
| CN203193552U (en) | Soft start cabinet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150527 |