CN207069920U - A kind of air-conditioning frequency-converting speed-governing control system - Google Patents
A kind of air-conditioning frequency-converting speed-governing control system Download PDFInfo
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- CN207069920U CN207069920U CN201720950070.2U CN201720950070U CN207069920U CN 207069920 U CN207069920 U CN 207069920U CN 201720950070 U CN201720950070 U CN 201720950070U CN 207069920 U CN207069920 U CN 207069920U
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Abstract
The utility model discloses a kind of air-conditioning frequency-converting speed-governing control system, it includes 12 arteries and veins rectification circuits, IGBT inverters, temperature sensor and central processing unit, first alternating current of three phase mains input exports direct current to IGBT inverters after 12 arteries and veins rectification circuits carry out rectification, and the direct current is converted into the second exchange electricity output to compressor of air conditioner by IGBT inverters；Current environment temperature is gathered by temperature sensor simultaneously and exported to central processing unit, by central processing unit by current environment temperature compared with preset temperature, and according to comparative result output drive signal to IGBT inverters, IGBT inverters adjust the output frequency of second alternating current according to the drive signal, so as to change the speed of service of compressor of air conditioner, rectification is carried out by using 12 arteries and veins rectification circuits, avoid producing Current harmonic distortion, so as to reduce air-conditioning frequency-converting speed-governing control system in application to percent harmonic distortion caused by grid side.
Description
Technical field
Refrigeration control technical field is the utility model is related to, more particularly to a kind of air-conditioning frequency-converting speed-governing control system.
Background technology
Frequency control is current preferably one of speed regulating method, is widely used in the Energy Saving Control of motor load.For many years,
As the huge phenomenon of the power consumption of data center increasingly highlights, its operation cost pressure increases, also each in continuous research in industry
Class energy-conservation invention, and frequency control is exactly one of its research direction, is turned by the compressor for adjusting air conditioner in machine room with indoor fan
Speed, the cold output regulation of air conditioner in machine room is realized, there is better energy-saving effect.
And in the frequency control equipment routinely applied, the importation of ac-dc-ac inverter arrangements for speed regulation all uses two poles
Pipe rectification.This rectifier system can make speed control device produce larger harmonic current, its current distortion rate even up to 90%~
100%, harmonic pollution is produced to the grid side of frequency control equipment, interference easily is produced to other equipment on power network, in some instances it may even be possible to
The danger for causing equipment malfunction to be made.
Thus prior art could be improved and improve.
Utility model content
In view of in place of above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of air-conditioning frequency control control
System processed, rectification is carried out by using 12 arteries and veins rectification circuits, avoid producing Current harmonic distortion, become frequency modulation so as to reduce air-conditioning
Speed control system is in application to percent harmonic distortion caused by grid side.
In order to achieve the above object, the utility model takes following technical scheme：
A kind of air-conditioning frequency-converting speed-governing control system, it include 12 arteries and veins rectification circuits, IGBT inverters, temperature sensor and
Central processing unit, the first alternating current of three phase mains input export direct current to IGBT after 12 arteries and veins rectification circuits carry out rectification
Inverter, the direct current is converted into the second exchange electricity output to compressor of air conditioner by IGBT inverters；Pass through temperature simultaneously
Sensor gathers current environment temperature and exported to central processing unit, by central processing unit by current environment temperature with presetting
Temperature is compared, and is believed according to comparative result output drive signal to IGBT inverters, IGBT inverters according to the driving
The output frequency of number regulation second alternating current, so as to change the speed of service of compressor of air conditioner.
In described air-conditioning frequency-converting speed-governing control system, the 12 arteries and veins rectification circuit includes phase-shifting transformer, the one or six
Arteries and veins rectifier bridge and the two or six arteries and veins rectifier bridge, it is defeated after the shifted transformer progress phase shift processing of the first alternating current of three phase mains input
Go out first voltage and second voltage, by the one or six arteries and veins rectifier bridge and the two or six arteries and veins rectifier bridge respectively to the first voltage and second
Output exports direct current to IGBT inverters to same dc bus by the dc bus after voltage carries out rectification processing.
In described air-conditioning frequency-converting speed-governing control system, the phase-shifting transformer includes primary coil, the first secondary coil
With the second secondary coil, the primary coil is star-star connection, is connected with three phase mains；First secondary coil connects for star
Line, it is connected with the one or six arteries and veins rectifier bridge；Second secondary coil is angle scheme, is connected with the two or six arteries and veins rectifier bridge.
In described air-conditioning frequency-converting speed-governing control system, in addition to the phase sequential signal exported for detecting IGBT inverters
Phase-sequence detector, the phase-sequence detector connect the central processing unit.
It is described logical in described air-conditioning frequency-converting speed-governing control system, in addition to for the communication interface with upper machine communication
Communication interface is connected with central processing unit.
It is described in described air-conditioning frequency-converting speed-governing control system, in addition to for showing the display of air-conditioning state information
Display is connected with central processing unit.
In described air-conditioning frequency-converting speed-governing control system, the central processing unit handles core by driving chip, communication signal
Piece and display chip encapsulation form.
In described air-conditioning frequency-converting speed-governing control system, the model TMS320F2812 of the driving chip, the communication
The model MAX485 of signal processing chip, the model TM1602 of the display chip.
In described air-conditioning frequency-converting speed-governing control system, the communication interface is RS485 interfaces.
In described air-conditioning frequency-converting speed-governing control system, the display is light-emitting diode display or OLED display.
Compared to prior art, air-conditioning frequency-converting speed-governing control system provided by the utility model includes 12 arteries and veins rectified currents
Road, IGBT inverters, temperature sensor and central processing unit, the first alternating current of three phase mains input is through 12 arteries and veins rectification circuits
Direct current is exported to IGBT inverters after carrying out rectification, and the direct current is converted into the second exchange electricity output by IGBT inverters
To compressor of air conditioner；Current environment temperature is gathered by temperature sensor simultaneously and exported to central processing unit, by centre
Device is managed by current environment temperature compared with preset temperature, and according to comparative result output drive signal to IGBT inversions
Device, IGBT inverters adjust the output frequency of second alternating current according to the drive signal, so as to change compressor of air conditioner
The speed of service, by using 12 arteries and veins rectification circuits carry out rectification, avoid produce Current harmonic distortion, so as to reduce air-conditioning become
Frequency modulation speed control system is in application to percent harmonic distortion caused by grid side.
Brief description of the drawings
Fig. 1 is the structured flowchart of air-conditioning frequency-converting speed-governing control system provided by the utility model.
Fig. 2 is the circuit diagram of 12 arteries and veins rectification circuits in air-conditioning frequency-converting speed-governing control system provided by the utility model.
Embodiment
Air-conditioning frequency-converting speed-governing control system provided by the utility model carries out rectification by using 12 arteries and veins rectification circuits, keeps away
Exempt to produce Current harmonic distortion, so as to reduce air-conditioning frequency-converting speed-governing control system in application to harmonic distortion caused by grid side
Rate.
To make the purpose of this utility model, technical scheme and effect clearer, clear and definite, develop simultaneously implementation referring to the drawings
The utility model is further described example.It should be appreciated that specific embodiment described herein is only explaining this practicality
It is new, it is not used to limit the utility model.
Referring to Fig. 1, air-conditioning frequency-converting speed-governing control system provided by the utility model include 12 arteries and veins rectification circuits 10,
IGBT inverters 20, temperature sensor 30 and central processing unit 40, the 12 arteries and veins rectification circuit 10 connect with IGBT inverters 20
Connect, the IGBT inverters 20 and temperature sensor 30 are connected with central processing unit 40；First exchange of three phase mains input
Electricity exports direct current to IGBT inverters 20 after 12 arteries and veins rectification circuits 10 carry out rectification, will be described straight by IGBT inverters 20
Stream electricity is converted to the second exchange electricity output to compressor of air conditioner；Current environment temperature is gathered simultaneously by temperature sensor 30 simultaneously
Output to central processing unit 40, by central processing unit 40 by current environment temperature compared with preset temperature, and according to than
Compared with result output drive signal to IGBT inverters 20, IGBT inverters 20 are according to drive signal regulation second exchange
The output frequency of electricity, so as to change the speed of service of compressor of air conditioner.
Air-conditioning frequency-converting speed-governing control system i.e. provided by the utility model is to three-phase electricity by 12 arteries and veins rectification circuits 10
First alternating current of source input carries out rectification, the constant direct current of output voltage, passes through the output frequency of IGBT inverters 20 afterwards
Adjustable second alternating current is to compressor of air conditioner, by the output frequency for changing the second alternating current, you can adjust the fortune of compressor
Scanning frequency degree, and then adjust air-conditioning and export cold to reach the purpose of energy-conservation, environment temperature is gathered especially by temperature sensor 30,
And according to current environment temperature output drive signal to IGBT inverters 20, to change the output frequency of the second alternating current, example
If current environmental temperature is more than preset temperature, refrigeration cool-down is now needed, therefore drive the of the output of IGBT inverters 20
The frequency rise of two alternating currents, and then the speed of service rise of compressor of air conditioner is controlled, to reach the purpose for improving cold output,
Similarly, if current environmental temperature is less than or equal to preset temperature, now compressor, which need not run at high speed, wastes the energy, therefore reduces
The frequency of second alternating current, the speed of service of compressor of air conditioner is also declined, so as to save energy consumption, while realize air-conditioning cold flow
Real-time regulation and energy-saving effect, and due to the utility model be by 12 arteries and veins rectification circuits 10 carry out rectification, from skill
It can avoid producing Current harmonic distortion in art principle, so as to reduce air-conditioning frequency-converting speed-governing control system to humorous caused by grid side
Ripple aberration rate, effectively reduces harmonic pollution in electric power net.
Specifically, Fig. 2 is please participated in the lump, and it is whole that the 12 arteries and veins rectification circuit 10 includes phase-shifting transformer 100, the one or six arteries and veins
The arteries and veins rectifier bridge 12 of bridge 11 and the 2nd 6, the primary side connection three-phase power input end of the phase-shifting transformer 100 are flowed, the phase shift becomes
The output end of depressor 100 connects the one or six arteries and veins rectifier bridge 11 and the two or six arteries and veins rectifier bridge 12, the first exchange of three phase mains input
The shifted transformer 100 of electricity exports first voltage and second voltage after carrying out phase shift processing, by the one or six arteries and veins rectifier bridge 11 and the
Output is led to same dc bus after two or six arteries and veins rectifier bridges 12 carry out rectification processing to the first voltage and second voltage respectively
Cross the dc bus and export direct current to IGBT inverters 20.Pass through two six arteries and veins of phase shift multiple connection i.e. in the utility model
Rectifier bridge is rushed, composition twelve-pulse rectification circuit is to same DC bus powered, with regard to that can make caused by a six impulse commutation bridges
Harmonic wave harmonic wave caused by another six impulse commutations bridge is offset, and is substantially eliminated net side 5 times, 7 order harmonic components, is significantly inhibited
Side harmonics caused by frequency conversion speed-adjusting system pollute power network, improve the security of frequency-converting speed-governing control system.
Further, the phase-shifting transformer 100 includes primary coil 101, the first secondary coil 102 and the second secondary line
Circle 103, the primary coil 101 are star-star connection, are connected with three phase mains；First secondary coil 102 be star-star connection,
It is connected with the one or six arteries and veins rectifier bridge 11；Second secondary coil 103 is angle scheme, is connected with the two or six arteries and veins rectifier bridge 12.
As shown in Fig. 2 the primary side side of phase-shifting transformer 100 is the three-phase electricity of Y-connection, secondary side is connected by star and triangle respectively
Circuit composition is connect, the secondary primary side of wherein star-star connection does not have phase place change, and the secondary of Y and △ connection is former
Side can produce 30 ° of phase difference, and so as to realize phase shift, the two-way winding of secondary side is connected serially into the one or six arteries and veins rectifier bridge 11 respectively
With the two or six arteries and veins rectifier bridge 12, then 5 times caused by one of them six arteries and veins rectifier bridge, 7 subharmonic and another six arteries and veins rectifier bridge
Caused corresponding times harmonic current amplitude is equal, opposite in phase, cancels each other so as to not appear in the input of whole system
In the electric current of side, so as to avoid producing Current harmonic distortion in technical principle, effectively suppress percent harmonic distortion.
Specifically, the 12 arteries and veins rectification circuit 10 also includes the first electric capacity C1 and the second electric capacity C2, the one or six arteries and veins
Rectifier bridge 11 includes the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the 5th diode D5
With the 6th diode D6, negative pole, the second diode D2 negative pole and the 3rd diode D3 negative pole of the first diode D1
The positive pole of dc bus and the first electric capacity C1 one end are all connected with, the positive pole of the first diode D1 connects the 4th diode D4
Negative pole and the first secondary coil 102 a1 ends；The positive pole of the second diode D2 connect the 5th diode D5 negative pole and
The b1 ends of first secondary coil 102；The positive pole of the 3rd diode D3 connects the 6th diode D6 negative pole and the first secondary
The c1 ends of coil 102；The positive pole of the positive pole of the 4th diode D4, the 5th diode D5 positive pole and the 6th diode D6 is equal
Connect the first electric capacity C1 other end and the second electric capacity C2 one end.
Two or the six arteries and veins rectifier bridge 12 includes the 7th diode D7, the 8th diode D8, the 9th diode D9, the 12nd
Pole pipe D10, the 11st diode D11 and the 12nd diode D12, negative pole, the 8th diode D8 of the 7th diode D7
Negative pole and the 9th diode D9 negative pole be all connected with the first electric capacity C1 other end and the second electric capacity C2 one end, the described 7th
Diode D7 positive pole connects the tenth diode D10 negative pole and the c2 ends of the second secondary coil 103；The 8th diode D8
Positive pole connect the 11st diode D11 negative pole and the second secondary coil 103 b2 ends；The positive pole of the 9th diode D9
Connect the 12nd diode D12 negative pole and the a2 ends of the second secondary coil 103；The positive pole of the tenth diode D10, the tenth
One diode D11 positive pole and the 12nd diode D12 positive pole be all connected with dc bus negative pole and the second electric capacity C2 it is another
One end, the first electric capacity C1 and the second electric capacity C2 mainly strobe.
Preferably, the air-conditioning frequency-converting speed-governing control system also includes being used for the phase sequence letter for detecting the output of IGBT inverters 20
Number phase-sequence detector 50, the phase-sequence detector 50 connects the central processing unit 40, i.e., examined by phase-sequence detector 50
The phase sequential signal of IGBT inverters 20 is surveyed, and the phase sequence signal output to central processing unit 40, central processing unit 40 will be tied
Environment temperature and phase sequence signal output drive signal before being fated to IGBT inverters 20, such as when IGBT inverters 20 export
Phase sequential signal malfunctions, and during so as to cause compressor of air conditioner to invert, central processing unit 40 will be adjusted according to the phase sequential signal of current feedback
Whole drive signal, to change the phase sequence that IGBT inverters 20 export the second alternating current, realize the function of protection compressor.
It is to be understood that in the present embodiment, the IGBT inverters 20 and phase-sequence detector 50 are prior art, herein
Its structure and annexation are not repeated.
Further, the air-conditioning frequency-converting speed-governing control system also includes being used for the communication interface 60 with upper machine communication,
The communication interface 60 is connected with central processing unit 40, and by the communication interface 60 and upper machine communication, host computer can be achieved
Interacted with the teledata of air-conditioning frequency-converting speed-governing control system, form air conditioner in machine room group control system, realized and coordinated by host computer
The refrigeration outputs of each air-conditioning are dispatched, realization is uniformly controlled.The specific communication interface 60 can use RS485 interfaces, or
Other have the interface of communication function to person, such as RS232 interface etc., the utility model are not construed as limiting to this.
Further, the air-conditioning frequency-converting speed-governing control system also includes being used for the display for showing air-conditioning state information
70, the display 70 is connected with central processing unit 40, and current air-conditioning state information is shown by the display 70, such as
The temperature of current setting, wind speed, compressor rotary speed, mode of operation etc., can also the current environment temperature of simultaneous display etc., it is excellent
Selection of land, the display 70 are light-emitting diode display 70 or OLED display 70, can specifically be selected according to the actual requirements.
When it is implemented, the utility model use central processing unit 40 by driving chip, communication signal process chip and
Display chip encapsulation forms.Driving for example with model TMS320F2812 driving chip output IGBT inverters 20 is believed
Number, encapsulated using model MAX485 communication signal process chip and model TM1602 display chip, then by three
Into SoC, the central processing unit 40 in the present embodiment is collectively constituted, certainly, in other embodiments, can also use has identical work(
Can the driving chips of other models, communication signal process chip and display chip, the utility model be not construed as limiting to this.
In summary, air-conditioning frequency-converting speed-governing control system provided by the utility model includes 12 arteries and veins rectification circuits, IGBT
Inverter, temperature sensor and central processing unit, the first alternating current of three phase mains input are whole through the progress of 12 arteries and veins rectification circuits
Direct current is exported after stream to IGBT inverters, the direct current is converted into the second exchange electricity output to air-conditioning by IGBT inverters
Compressor；Current environment temperature is gathered by temperature sensor simultaneously and exported to central processing unit, will by central processing unit
Current environment temperature is compared with preset temperature, and according to comparative result output drive signal to IGBT inverters, IGBT
Inverter adjusts the output frequency of second alternating current according to the drive signal, so as to change the operation of compressor of air conditioner speed
Degree, rectification is carried out by using 12 arteries and veins rectification circuits, avoid producing Current harmonic distortion, so as to reduce air-conditioning frequency control control
System processed is in application to percent harmonic distortion caused by grid side.
It is understood that for those of ordinary skills, can according to the technical solution of the utility model and
The design of its utility model is subject to equivalent substitution or change, and all these changes or replacement should all belong to appended by the utility model
Scope of the claims.
Claims (10)
1. a kind of air-conditioning frequency-converting speed-governing control system, it is characterised in that including 12 arteries and veins rectification circuits, IGBT inverters, temperature
Sensor and central processing unit, the first alternating current of three phase mains input export direct current after 12 arteries and veins rectification circuits carry out rectification
The direct current is converted to the second exchange electricity output to compressor of air conditioner by electricity to IGBT inverters by IGBT inverters；Simultaneously
Current environment temperature is gathered by temperature sensor and exported to central processing unit, by central processing unit by current environment temperature
Degree is compared with preset temperature, and according to comparative result output drive signal to IGBT inverters, IGBT inverters are according to institute
The output frequency that drive signal adjusts second alternating current is stated, so as to change the speed of service of compressor of air conditioner.
2. air-conditioning frequency-converting speed-governing control system according to claim 1, it is characterised in that the 12 arteries and veins rectification circuit bag
Include phase-shifting transformer, the one or six arteries and veins rectifier bridge and the two or six arteries and veins rectifier bridge, the shifted change of the first alternating current of three phase mains input
Depressor exports first voltage and second voltage after carrying out phase shift processing, is distinguished by the one or six arteries and veins rectifier bridge and the two or six arteries and veins rectifier bridge
Output is exported to same dc bus by the dc bus after carrying out rectification processing to the first voltage and second voltage
Direct current is to IGBT inverters.
3. air-conditioning frequency-converting speed-governing control system according to claim 2, it is characterised in that the phase-shifting transformer includes original
Sideline circle, the first secondary coil and the second secondary coil, the primary coil are star-star connection, are connected with three phase mains；It is described
First secondary coil is star-star connection, is connected with the one or six arteries and veins rectifier bridge；Second secondary coil is angle scheme and second
Six arteries and veins rectifier bridges connect.
4. air-conditioning frequency-converting speed-governing control system according to claim 1, it is characterised in that also include inverse for detecting IGBT
Become the phase-sequence detector of the phase sequential signal of device output, the phase-sequence detector connects the central processing unit.
5. air-conditioning frequency-converting speed-governing control system according to claim 1, it is characterised in that also include being used to lead to host computer
The communication interface of news, the communication interface are connected with central processing unit.
6. air-conditioning frequency-converting speed-governing control system according to claim 1, it is characterised in that also include being used to show air-conditioning shape
The display of state information, the display are connected with central processing unit.
7. air-conditioning frequency-converting speed-governing control system according to claim 1, it is characterised in that the central processing unit is by driving
Chip, communication signal process chip and display chip encapsulation form.
8. air-conditioning frequency-converting speed-governing control system according to claim 7, it is characterised in that the model of the driving chip
TMS320F2812, the model MAX485 of the communication signal process chip, the model TM1602 of the display chip.
9. air-conditioning frequency-converting speed-governing control system according to claim 5, it is characterised in that the communication interface is RS485
Interface.
10. air-conditioning frequency-converting speed-governing control system according to claim 6, it is characterised in that the display is that LED is shown
Device or OLED display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720950070.2U CN207069920U (en) | 2017-08-01 | 2017-08-01 | A kind of air-conditioning frequency-converting speed-governing control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720950070.2U CN207069920U (en) | 2017-08-01 | 2017-08-01 | A kind of air-conditioning frequency-converting speed-governing control system |
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| Publication Number | Publication Date |
|---|---|
| CN207069920U true CN207069920U (en) | 2018-03-02 |
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| CN201720950070.2U Active CN207069920U (en) | 2017-08-01 | 2017-08-01 | A kind of air-conditioning frequency-converting speed-governing control system |
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| Country | Link |
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| CN (1) | CN207069920U (en) |
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2017
- 2017-08-01 CN CN201720950070.2U patent/CN207069920U/en active Active
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