CN205986656U - Middle -size and small -size fan rectification braking main circuit - Google Patents
Middle -size and small -size fan rectification braking main circuit Download PDFInfo
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- CN205986656U CN205986656U CN201621010835.6U CN201621010835U CN205986656U CN 205986656 U CN205986656 U CN 205986656U CN 201621010835 U CN201621010835 U CN 201621010835U CN 205986656 U CN205986656 U CN 205986656U
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Abstract
The utility model provides a middle -size and small -size fan rectification braking main circuit, includes fan rectifier circuit, blower braking circuit, the blower braking circuit is wherein brakied the positive pole of diode and is connected the output of fan three -phase AC including braking diode, braking switch concatenation, and the other end ground connection of the one end of brake switch, brake switch is connected to the negative pole of braking diode. The utility model provides a blower braking circuit can not the depletion load energy of end, very big reduction energy loss, strengthened the efficiency of fan control ware.
Description
Technical field
This utility model is related to controller of fan field, and main circuit is braked in specially a kind of middle-size and small-size blower fan rectification.
Background technology
Rectification circuit generally refers to AC energy is converted to the circuit of direct current energy, and wind-driven generator refers to lead to
Cross and apply the mode of large energy consumption and drag wind-driven generator frame for movement and be in state out of service, popular wording is exactly
Allow blower fan can not turn.
At present, the blower fan rectifying part circuit of China's wind-driven power generation control system is typically all to adopt three groups of six diodes
Form three-phase bridge rectification circuit to realize, blower fan braking circuit individually adopts brake switch ground connection or accesses braking resistor,
It is attempted by between the direct current energy both positive and negative polarity of blower fan rectification output, the turn-on and turn-off then passing through to control brake switch will simultaneously
Blower fan braking is realized in the consumption in the form of heat energy of blower fan rectification DC power output in braking resistor and brake switch.Blower fan
Braking circuit is attempted by between the both positive and negative polarity of rectification circuit DC power output, and this Partial DC electric energy will be by air-blower control
Device uses for load（Accumulator charges or combining inverter DC side）, so must be female in rectification circuit DC power output
Series diode between line and controller of fan dc bus, to prevent from during braking circuit work also consuming the energy of load end
Fall.
The energy at depletion load end when preventing braking circuit work after series diode, but bring simultaneously one new
It is simply that the loss of diode energy itself, diode has the voltage drop of a fixation to problem in itself, when controller of fan gives load
When end provides blower fan side energy, the electric current flowing to load end can persistently produce energy loss because of the pressure drop of diode itself.
The efficiency of load end energy utilization so can be reduced, and this partition losses can continue to distribute in the form of heat, this is partly hot
Amount can affect life-span and the operating accuracy of other devices of controller of fan.
Utility model content
This utility model in order to overcome conventional fan rectification to brake energy loss that main circuit brings because of series diode with
And heat the problems such as affect other devices it is proposed that main circuit is braked in a kind of middle-size and small-size blower fan rectification, including blower fan rectification circuit,
Blower fan braking circuit, described blower fan braking circuit includes brake, diode, brake switch concatenation, the wherein anode of brake, diode
Connecting fan three-phase alternating current exports, and the negative electrode of brake, diode connects one end of brake switch, the other end ground connection of brake switch.
Preferably, described blower fan braking circuit includes brake, diode, brake switch, braking resistor concatenation, wherein brakes
The anode connecting fan three-phase alternating current output of diode, the negative electrode of brake, diode connects one end of braking resistor, braking resistor
The other end connect brake switch, brake switch the other end ground connection.
Preferably, the upper half-bridge of described blower fan rectification circuit adopts three independent diode anodes difference connecting fans
UVW, the negative electrode of three separate diode is directly connected to dc bus simultaneously；The lower half-bridge of described blower fan rectification circuit adopts three
The negative electrode of independent diode connects the UVW of wind-driven generator, the plus earth of three separate diode.
Preferably, described brake, diode is a diode or be made up of multiple diodes in parallels, described braking
Resistance is a resistance or is made up of multiple resistor coupled in parallel, and described brake switch is a brake switch or is opened by multiple brakings
Pass composes in parallel.
Preferably, described brake switch is fet switch.
Main circuit is braked in a kind of middle-size and small-size blower fan rectification that this utility model provides：
Blower fan three-phase alternating current exports U and is connected positive pole, the negative pole of commutation diode D2 and the braking of commutation diode D1
The positive pole of diode D7；
Blower fan three-phase alternating current exports V and is connected positive pole, the negative pole of commutation diode D4 and the braking of commutation diode D3
The positive pole of diode D8；
Blower fan three-phase alternating current exports W and is connected positive pole, the negative pole of commutation diode D6 and the braking of commutation diode D5
The positive pole of diode D9；
Commutation diode D1, D2, D3, D4, D5, D6 form rectified three-phase circuit, by blower fan threephase AC electric energy UVW rectification
For direct current energy DC/GND, commutation diode D1, D3, D5 negative pole connection DC, commutation diode D2, D4, D6 positive pole connects GND,
Direct current energy positive pole DC is directly connected to load end positive pole, and load end negative pole connects GND；
Diode D7, D8, D9 negative pole is simultaneously connected with braking resistor R1 or one end of multiple braking resistor parallel connection, braking electricity
The other end of resistance R1 or the parallel connection of multiple braking resistor connects field effect transistor Q1 or the drain electrode of multiple field effect transistor parallel connection, and field is imitated
Should pipe Q1 or multiple field effect transistor source ground in parallel.
Workflow of the present utility model is as follows：
1st, when energy needed for load end is more than or equal to blower fan output energy, blower fan braking circuit does not work, and blower fan exports
Energy is all supplied to load end and uses；
2nd, when energy needed for load end is less than blower fan output energy, blower fan braking circuit work under controller of fan control
Make, by blower fan export energy be more than energy needed for load end part in the form of heat energy consumption in blower fan braking circuit；
3rd, when energy needed for load end is 0, blower fan braking circuit is operated in normally open under controller of fan control,
Will blower fan output energy all in the form of heat energy consumption in blower fan braking circuit, blower fan is in on-position.
In three above state, load end using energy all do not have diode produce loss, greatly enhance
Controller of fan energy conversion efficiency.
A kind of middle-size and small-size blower fan rectification braking main circuit that this utility model provides, its blower fan rectification circuit equally adopts three
Six diodes of group, and its blower fan braking circuit directly from blower fan three-phase alternating current respectively series diode connect field effect transistor or
Access the mode of braking resistor.So when its blower fan braking circuit works, because the presence of three groups of six commutation diodes, wind
Machine braking circuit will not depletion load end energy, so not needing series diode in dc bus loop.Thus greatly
The efficiency reducing energy loss, enhancing controller of fan.During the work of blower fan braking circuit, it is serially connected in blower fan three-phase alternating current
Three diodes of outfan also can produce energy expenditure, but the energy inherently load end that blower fan braking consumes is not using
On energy, so this partition losses does not affect the efficiency of controller of fan.
Brief description
By reading the detailed description of hereafter preferred implementation, various other advantages and benefit are common for this area
Technical staff will be clear from understanding.Accompanying drawing is only used for illustrating the purpose of preferred implementation, and is not considered as to this practicality
New restriction.And in whole accompanying drawing, it is denoted by the same reference numerals identical part.In the accompanying drawings：
Fig. 1 is that main circuit is braked in blower fan rectification of the present utility model.
Fig. 2 is that main circuit is braked in the blower fan rectification of prior art.
Specific embodiment
It is more fully described the illustrative embodiments of the disclosure below with reference to accompanying drawings.Although showing this public affairs in accompanying drawing
The illustrative embodiments opened are it being understood, however, that may be realized in various forms the disclosure and the reality that should not illustrated here
The mode of applying is limited.On the contrary, these embodiments are provided to be able to be best understood from the disclosure, and can be by this public affairs
What the scope opened was complete conveys to those skilled in the art.
According to embodiment of the present utility model, as shown in Figure 1, the middle-size and small-size blower fan rectification system that this utility model provides
Dynamic main circuit structure is：
Blower fan three-phase alternating current exports U and is connected positive pole, the negative pole of commutation diode D2 and the braking of commutation diode D1
The positive pole of diode D7；
Blower fan three-phase alternating current exports V and is connected positive pole, the negative pole of commutation diode D4 and the braking of commutation diode D3
The positive pole of diode D8；
Blower fan three-phase alternating current exports W and is connected positive pole, the negative pole of commutation diode D6 and the braking of commutation diode D5
The positive pole of diode D9；
Commutation diode D1, D2, D3, D4, D5, D6 form rectified three-phase circuit, by blower fan threephase AC electric energy UVW rectification
For direct current energy DC/GND, commutation diode D1, D3, D5 negative pole connection DC, commutation diode D2, D4, D6 positive pole connects GND,
Direct current energy positive pole DC is directly connected to load end positive pole, and load end negative pole connects GND；
Diode D7, D8, D9 negative pole is simultaneously connected with one end of braking resistor R1, and the other end of braking resistor R1 connects field effect
Should pipe Q1 drain electrode, the source ground of field effect transistor Q1.
Blower fan rectification braking main circuit workflow of the present utility model is as follows：
1st, when energy needed for load end is more than or equal to blower fan output energy, blower fan braking circuit does not work, and blower fan exports
Energy is all supplied to load end and uses；
2nd, when energy needed for load end is less than blower fan output energy, blower fan braking circuit work under controller of fan control
Make in PWM mode, blower fan is exported the part that energy is more than energy needed for load end consumption in the form of heat energy and brakes in blower fan
Circuit；
3rd, when energy needed for load end is 0, blower fan braking circuit is operated in normally open under controller of fan control,
Will blower fan output energy all in the form of heat energy consumption in blower fan braking circuit, blower fan is in on-position.
In three above state, load end using energy do not have diode produce loss, compare conventional fan whole
Stream braking circuit, this utility model greatly enhances controller of fan energy conversion efficiency.
Relative, conventional fan rectification braking main circuit is as shown in Figure 2：
Blower fan three-phase alternating current exports U and is connected positive pole, the negative pole of commutation diode D2 and the braking of commutation diode D1
The positive pole of diode D7；
Blower fan three-phase alternating current exports V and is connected positive pole, the negative pole of commutation diode D4 and the braking of commutation diode D3
The positive pole of diode D8；
Blower fan three-phase alternating current exports W and is connected positive pole, the negative pole of commutation diode D6 and the braking of commutation diode D5
The positive pole of diode D9；
Commutation diode D1, D2, D3, D4, D5, D6 form rectified three-phase circuit, by blower fan threephase AC electric energy UVW rectification
For direct current energy DC/GND, commutation diode D1, D3, D5 negative pole connection DC, commutation diode D2, D4, D6 positive pole connects GND,
Direct current energy positive pole DC series diode D7 connects load end positive pole, and load end negative pole connects GND；
Direct current energy positive pole DC connects one end of braking resistor R1, and the other end of braking resistor R1 connects field effect transistor Q1
Drain electrode, the source ground of field effect transistor Q1.
The workflow that main circuit is braked in conventional fan rectification is as follows：
1st, when energy needed for load end is more than or equal to blower fan output energy, blower fan braking circuit does not work, and blower fan exports
Energy is all supplied to load end and uses；
2nd, when energy needed for load end is less than blower fan output energy, blower fan braking circuit work under controller of fan control
Make in PWM mode, blower fan is exported the part that energy is more than energy needed for load end consumption in the form of heat energy and brakes in blower fan
Circuit；
3rd, when energy needed for load end is 0, blower fan braking circuit is operated in normally open under controller of fan control,
Will blower fan output energy all in the form of heat energy consumption in blower fan braking circuit, blower fan is in on-position.
In three above state, diode D7, always in consumed energy, reduces controller of fan energy conversion efficiency.
So, a kind of middle-size and small-size blower fan rectification braking main circuit that this utility model provides, its blower fan rectification circuit is same
Using three groups of six diodes, and its blower fan braking circuit is directly from blower fan three-phase alternating current, and series diode connects field effect respectively
Pipe or the mode accessing braking resistor.So when its blower fan braking circuit works, because three groups of six commutation diodes
Exist, blower fan braking circuit will not depletion load end energy, so not needing series diode in dc bus loop.From
And greatly reduce energy loss, enhance the efficiency of controller of fan.During the work of blower fan braking circuit, it is serially connected in blower fan three
Three diodes of cross streams outfan also can produce energy expenditure, but the energy inherently load end that blower fan braking consumes
The energy that profit is not used, so this partition losses does not affect the efficiency of controller of fan.
The above, only this utility model preferably specific embodiment, but protection domain of the present utility model is not
It is confined to this, any those familiar with the art, in the technical scope that this utility model discloses, can readily occur in
Change or replacement, all should cover within protection domain of the present utility model.Therefore, protection domain of the present utility model answers institute
State and be defined by scope of the claims.
Claims (5)
1. main circuit is braked in a kind of middle-size and small-size blower fan rectification, including blower fan rectification circuit, blower fan braking circuit it is characterised in that：
Described blower fan braking circuit includes brake, diode, brake switch concatenation, the wherein anode connecting fan three-phase of brake, diode
Exchange output, the negative electrode of brake, diode connects one end of brake switch, the other end ground connection of brake switch.
2. as claimed in claim 1 a kind of middle-size and small-size blower fan rectification braking main circuit it is characterised in that：Described blower fan braking electricity
Road includes brake, diode, brake switch, braking resistor concatenation, and the anode connecting fan three-phase alternating current of wherein brake, diode is defeated
Go out, the negative electrode of brake, diode connects one end of braking resistor, the other end of braking resistor connects brake switch, brake switch
The other end is grounded.
3. as claimed in claim 1 a kind of middle-size and small-size blower fan rectification braking main circuit it is characterised in that：Described blower fan rectified current
The upper half-bridge on road adopts the UVW of three independent diode anodes difference connecting fans, and the negative electrode of three separate diode is simultaneously
It is directly connected to dc bus；The lower half-bridge of described blower fan rectification circuit connects wind-force using the negative electrode of three independent diodes and sends out
The UVW of motor, the plus earth of three separate diode.
4. as claimed in claim 1 or 2 a kind of middle-size and small-size blower fan rectification braking main circuit it is characterised in that：Described braking
Diode is a diode or is made up of multiple diodes in parallels, and described braking resistor is for a resistance or by multiple resistance
Compose in parallel, described brake switch is a brake switch or is composed in parallel by multiple brake switches.
5. as claimed in claim 4 a kind of middle-size and small-size blower fan rectification braking main circuit it is characterised in that：Described brake switch
For insulating gate type field effect tube switch or insulated gate bipolar transistor switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621010835.6U CN205986656U (en) | 2016-08-30 | 2016-08-30 | Middle -size and small -size fan rectification braking main circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621010835.6U CN205986656U (en) | 2016-08-30 | 2016-08-30 | Middle -size and small -size fan rectification braking main circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205986656U true CN205986656U (en) | 2017-02-22 |
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ID=58039502
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621010835.6U Active CN205986656U (en) | 2016-08-30 | 2016-08-30 | Middle -size and small -size fan rectification braking main circuit |
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| Country | Link |
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| CN (1) | CN205986656U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109936193A (en) * | 2019-03-27 | 2019-06-25 | 合肥为民电源有限公司 | A kind of wind-power electricity generation discharging circuit and unloading control method |
-
2016
- 2016-08-30 CN CN201621010835.6U patent/CN205986656U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109936193A (en) * | 2019-03-27 | 2019-06-25 | 合肥为民电源有限公司 | A kind of wind-power electricity generation discharging circuit and unloading control method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |