CN207920932U - A kind of DC fan governor - Google Patents
A kind of DC fan governor Download PDFInfo
- Publication number
- CN207920932U CN207920932U CN201721892406.0U CN201721892406U CN207920932U CN 207920932 U CN207920932 U CN 207920932U CN 201721892406 U CN201721892406 U CN 201721892406U CN 207920932 U CN207920932 U CN 207920932U
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- China
- Prior art keywords
- module
- field
- wind turbine
- effect tube
- signal
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- 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
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- Control Of Eletrric Generators (AREA)
- Wind Motors (AREA)
Abstract
A kind of DC fan governor, including switch module and the pwm pulse modulation module with switch module cooperating, while being additionally provided with failure feedback module.The power consumption that governor to solve resistance wire winding method in the prior art generates is big, governor caused by fever is high has the technical issues of security risk, driving time by controlling wind turbine realizes the speed governing to DC fan, ensure that the safety of governor work to a certain extent.
Description
Technical field
The utility model is related to governor field, more particularly to a kind of DC fan governor.
Background technology
Governor is one of the basic device in motor control assembly, is even more especially in the motor applications equipment such as wind turbine
It is widely used.Original governor is the resistance wire winding method used, and bronze drum regulation resistance filament length degree changes the big of resistance value
The small rotating speed to regulation motor.But due to also will produce certain energy consumption when resistance is powered itself so that resistance wire winding
The most energy consumption of governor of mode is larger, causes the heat itself distributed also very high, is mounted on blower interior, will produce certain
Security risk.
Utility model content
The purpose of this utility model is to provide a kind of DC fan governors, and low energy consumption for the fan speed regulation device, fever
It is few.
The above-mentioned purpose of the utility model technical scheme is that：
A kind of DC fan governor, including：
Switch module, one end couple the positive input of wind turbine, and the other end couples power cathode；
Pwm pulse modulation module couples switch module, and switch module conducting is controlled by pwm pulse；
Failure feedback module couples switch module and pwm pulse modulation module, the output control wind when switch module damages
The fault feedback signal and alarm signal that machine at the uniform velocity works.
By using above-mentioned technical proposal, when the PWM wave of pwm pulse modulation module output can be realized to switch module break-make
Between control, the duty ratio by adjusting pwm pulse can realize the turn-on time of regulating switch module, and because switch module one
The positive input of end coupling wind turbine, other end coupling power cathode can pass through parallel shunt principle when switch module is connected
The simulation short circuit for realizing wind turbine, when switch module disconnects, wind turbine normal work, the i.e. turn-on time of switch module are indirectly real
The control to wind turbine driving time is showed, to have the function that adjust rotation speed of fan.Due to by the way of simulation short circuit
The adjusting to the driving time of wind turbine is realized to adjust the rotating speed of wind turbine, the energy of consumption is reduced, and calorific value is less, certain
The safety of governor work is increased in degree.Meanwhile the setting of failure feedback module can also be realized when switch module damages
Bad when, control wind turbine at the uniform velocity work, to the notification technique in the case where ensureing that equipment where short time inner blower works normally
Personnel overhaul or replace to speed adjusting module, further increase the safety of governor work.
As the improvement of the utility model, the switch module includes field-effect tube, the drain electrode coupling of the field-effect tube
The source electrode of positive pole, field-effect tube misses power cathode, and the grid of field-effect tube couples the pwm pulse modulation module.
By using above-mentioned technical proposal, field-effect tube as it is a kind of it is common cooperation pwm pulse work switch element,
Its stable work in work further improves the safety of the work of governor.
As the improvement of the utility model, the failure feedback module includes：
It is respectively coupled to pwm pulse modulation module with the input terminal of logic unit, including AND gate circuit, the AND gate circuit
The drain electrode of output end and field-effect tube, it is described to export fault-signal with logic unit when the field-effect tube is breakdown；
Feedback unit, coupling and logic unit, for receiving fault-signal, and when receiving fault-signal described in output
Fault feedback signal and alarm signal.
By using above-mentioned technical proposal, when field-effect tube works normally, drain electrode and the pwm pulse of field-effect tube are modulated
The electric polarity of the output end of module is on the contrary, when field-effect tube is breakdown, drain electrode and the pwm pulse modulation module of field-effect tube
The electric polarity of output end will appear identical situation, fault-signal be exported with logic unit at this time, to detect field-effect tube
Whether work normally.
As the improvement of the utility model, the feedback unit includes that corresponding failure signal obtains electric relay, it is described after
First normally closed get an electric shock of electric appliance is serially connected with the electric power loop of wind turbine, and first normally-closed contact has been arranged in parallel a current-limiting resistance,
Second normally-closed contact of the relay is serially connected between field-effect tube and positive pole.
By using above-mentioned technical proposal, when relay obtains it is electric when, illustrate that field-effect tube is breakdown, first normally closed touch at this time
Point disconnects so that current-limiting resistance is serially connected with the current supply circuit of wind turbine, realizes to the current limliting of wind turbine, at the uniform velocity works to control wind turbine
In preset rotating speed；When second normally-closed contact disconnects, field-effect tube is disconnected with positive pole, so as to avoid field-effect tube
Form the simulation short circuit to wind turbine.
As the improvement of the utility model, the current-limiting resistance is serially connected with a light emitting diode, when described and logic unit
When exporting fault-signal, the light emitting diode exports the alarm signal.
By using above-mentioned technical proposal, when the first normally-closed contact disconnects, light emitting diode obtains electroluminescence, to export
Alarm signal prompts technical staff's speed adjusting module to break down.
Further include filter module as the improvement of the utility model, the filter module is coupled between wind turbine and power supply.
By using above-mentioned technical proposal, the setting of filter module realizes the stabilization of wind turbine velocity of rotation, while on the scene
When effect pipe is connected, the electric current for flowing through field-effect tube can be prevented excessive, played to a certain extent in order to protect field-effect tube
Effect.
As the improvement of the utility model, the filter module includes LC filter circuits.
By using above-mentioned technical proposal, LC filter circuits are as a kind of common filter circuit, set-up mode degree,
Design scheme is easy, reduces the design difficulty of filter module to a certain extent.
Further include reverse polarity protection's module as the improvement of the utility model, reverse polarity protection's module includes concatenation
Diode between wind turbine and positive pole.
By using above-mentioned technical proposal, the setting of diode plays the role of placing current reflux, to play
Effect to the reverse polarity protection of circuit.
In conclusion the utility model has the advantages that：
One, power consumption is low, due to the use of field-effect tube instead of resistance wire, reduces the power consumption of governor；
Two, rotating speed control is easy, when needing to adjust rotation speed of fan, it is only necessary to adjust the duty ratio of pwm pulse, phase
Than in the length of regulation resistance silk, intelligence degree higher.
Description of the drawings
Fig. 1 is the system diagram of DC fan governor；
Fig. 2 is the internal circuit diagram of DC fan governor.
In figure, 1, wind turbine；2, switch module；3, pwm pulse modulation module；4, failure feedback module；5, filter module；6、
Reverse polarity protection's module.
Specific implementation mode
The utility model is described in further detail below in conjunction with attached drawing.
As depicted in figs. 1 and 2, a kind of DC fan governor, including switch module 2, control switch module 2 work
Pwm pulse modulation module 3 and failure feedback module 4.
Switch module 2, includes the field-effect tube FE of N-channel, and the drain electrode of field-effect tube FE couples positive pole, field-effect tube
The source electrode of FE misses power cathode, the grid coupling pwm pulse modulation module 3 of field-effect tube FE.
Pwm pulse modulation module 3 couples switch module 2, for exporting pwm pulse.The way of output of pwm pulse be at
The ripe prior art includes but not limited to export pwm pulse by microcontroller and pass through the duty of remote adjustment pwm pulse herein
Than and by microcontroller output pwm pulse and pass through the duty ratio of potentiometer adjusting pwm pulse.
Failure feedback module 4, including with logic unit and feedback unit.
With logic unit, including AND gate circuit AN, the input terminal of AND gate circuit AN is respectively coupled to connect pwm pulse modulation module
The drain electrode of 3 output end and field-effect tube FE, when field-effect tube FE is breakdown, AND gate circuit AN exports fault-signal.Wherein,
Bleeder circuit is connected between AND gate circuit AN and field-effect tube, bleeder circuit includes the fixed resistance R1 being arranged in series and fixation
The input terminal of resistance R2, fixed resistance R1 and the node coupling AND gate circuit AN of fixed resistance R2 couplings, fixed resistance R2 ground connection,
The drain electrode of fixed resistance R1 coupling field-effect tube FE.
Feedback unit, including the triode TD and relay KM of the NPN type that are arranged in series.Wherein, the current collection of triode TD
Pole couples positive pole, and the emitter of triode TD is grounded by the coil of relay KM, the base stage coupling of triode TD and door
The output end of circuit AN.The normally-closed contact KM1 of relay KM is serially connected between wind turbine 1 and power cathode, and normally-closed contact KM1 is also simultaneously
It is associated with current-limiting resistance R3, the normally-closed contact KM2 of relay KM is serially connected between above-mentioned field-effect tube FE and positive pole.When with door
When circuit AN output fault-signal, feedback unit exports fault feedback signal, triode TD conductings, relay KM obtain it is electric, it is normally closed
Contact KM1 and normally closed electric shock KM2 is disconnected, and wind turbine 1 couples power supply by current-limiting resistance R3, so that 1 continue working of wind turbine, with
Ensure continue working in the 1 place equipment short time of wind turbine；Above-mentioned current-limiting resistance R3 has also been arranged in series a light emitting diode simultaneously
D2, when AND gate circuit AN exports fault-signal, light emitting diode D2 obtains electricity output alarm signal, to play prompt technology people
The effect of member.
Filter module 5, filter module 5 are coupled between wind turbine 1 and power supply, including are made of inductance L and electrolytic capacitor C1
LC filter circuits.
Reverse polarity protection's module 6, including the diode D1 that is serially connected between wind turbine 1 and positive pole.
By above said content it is found that when wind turbine 1 works, pwm pulse modulation module 3 exports pwm pulse, to adjust
The make-and-break time of field-effect tube FE, and then adjust the rotating speed of wind turbine 1.When field-effect tube FE is breakdown, AND gate circuit AN outputs
Fault-signal, relay KM obtain electric, and wind turbine 1 couples power supply by current-limiting resistance R3, to continue working, light emitting diode D2 hairs
Light is to prompt technical staff.Due to realizing the control to 1 rotating speed of wind turbine using field-effect tube cooperation pwm pulse, in certain journey
It ensure that the safety during governor work on degree.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can as needed make the present embodiment the modification of not creative contribution after reading this specification, but
As long as all being protected by Patent Law in the right of the utility model.
Claims (8)
1. a kind of DC fan governor, it is characterised in that：Including
Switch module (2), one end couple the positive input of wind turbine (1), and the other end couples power cathode；
Pwm pulse modulation module (3), coupling switch module (2) control switch module (2) by pwm pulse and are connected；
Failure feedback module (4), coupling switch module (2) and pwm pulse modulation module (3), it is defeated when switch module (2) are damaged
Go out to control fault feedback signal and alarm signal that wind turbine (1) at the uniform velocity works.
2. a kind of DC fan governor according to claim 1, it is characterised in that：The switch module (2) includes field
The drain electrode of effect pipe, the field-effect tube couples positive pole, and the source electrode of field-effect tube misses power cathode, the grid of field-effect tube
Pole couples the pwm pulse modulation module (3).
3. a kind of DC fan governor according to claim 2, it is characterised in that：Failure feedback module (4) packet
It includes：
It is respectively coupled to pwm pulse modulation module (3) with the input terminal of logic unit, including AND gate circuit, the AND gate circuit
The drain electrode of output end and field-effect tube, it is described to export fault-signal with logic unit when the field-effect tube is breakdown；
Feedback unit, coupling and logic unit, for receiving fault-signal, and export the failure when receiving fault-signal
Feedback signal and alarm signal.
4. a kind of DC fan governor according to claim 3, it is characterised in that：The feedback unit includes corresponding event
Barrier signal obtains electric relay, and the first normally closed get an electric shock of the relay is serially connected with the electric power loop of wind turbine (1), and described first often
Closed contact has been arranged in parallel a current-limiting resistance, the second normally-closed contact of the relay be serially connected with field-effect tube and positive pole it
Between.
5. a kind of DC fan governor according to claim 4, it is characterised in that：The current-limiting resistance is serially connected with a hair
Optical diode, when the output fault-signal with logic unit, the light emitting diode exports the alarm signal.
6. a kind of DC fan governor according to claim 5, it is characterised in that：Further include filter module (5), it is described
Filter module (5) is coupled to wind turbine (1) between power supply.
7. a kind of DC fan governor according to claim 6, it is characterised in that：The filter module (5) includes LC
Filter circuit.
8. a kind of DC fan governor according to claim 7, it is characterised in that：It further include reverse polarity protection's module
(6), reverse polarity protection's module (6) includes being serially connected with diode of the wind turbine (1) between positive pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721892406.0U CN207920932U (en) | 2017-12-28 | 2017-12-28 | A kind of DC fan governor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721892406.0U CN207920932U (en) | 2017-12-28 | 2017-12-28 | A kind of DC fan governor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207920932U true CN207920932U (en) | 2018-09-28 |
Family
ID=63616546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721892406.0U Expired - Fee Related CN207920932U (en) | 2017-12-28 | 2017-12-28 | A kind of DC fan governor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207920932U (en) |
-
2017
- 2017-12-28 CN CN201721892406.0U patent/CN207920932U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180928 Termination date: 20201228 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |