CN109959129A - A kind of integral frequency conversion controller for screw machine central air-conditioning - Google Patents
A kind of integral frequency conversion controller for screw machine central air-conditioning Download PDFInfo
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- CN109959129A CN109959129A CN201711338804.2A CN201711338804A CN109959129A CN 109959129 A CN109959129 A CN 109959129A CN 201711338804 A CN201711338804 A CN 201711338804A CN 109959129 A CN109959129 A CN 109959129A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of integral frequency conversion controller for screw machine central air-conditioning, which has major loop and is integrated with the control system of variable frequency motor controller and generator set controller.Wherein, major loop provides the matched adjustable electric current of frequency, to control the motor speed of compressor；Generator set controller obtains and analyzes the cooling condition data of each unit equipment transmission, the output of fit object revolving speed temperature control curve and the matched policy control information of actual condition, and policy control information is sent to variable frequency motor controller；Variable frequency motor controller, the policy control information that will be received further complete output frequency adjustable function for the electric machine frequency adjustment signal of output electric current to major loop transmission to adjust the motor speed of compressor of air conditioner.The application improves the matching, reliability and scalability of unit allocation and frequency converter, significantly promotes unit operation efficiency, reduces project development period, fast responding market.
Description
Technical field
The present invention relates to screw machine field of central air-conditioning, more particularly, to a kind of height collection for screw machine central air-conditioning
At the frequency-variable controller of change.
Background technique
It is also growing for the duty requirements of central air-conditioning with the increase of social required quantity.In existing screw machine
In central air-conditioning, generally exported using the fixed frequency of motor, control cabinet uses star triangle soft start.There is starting punching in such driving method
It hits greatly, motor speed can not be adjusted, and can only mechanically adjust refrigeration work consumption, and a large amount of electric energy are converted to mechanical energy and heat
Can, larger waste of energy is not only caused, and since system is by mechanical shock and energy consumption temperature rise, influence lifetime of system.Simultaneously as
Electric machine controller is provided from unit temperature and pressure controller by different producers, in compatibility and the control of different capabilities unit
There are hidden danger in terms of the reliability of control strategy between device, simultaneously because needing to re-establish reliable control between different controllers
System strategy, substantially prolongs the project development time, influences project-based market and launch in time, reduces product competitiveness.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of integrated variable frequency controls for screw machine central air-conditioning
Device processed, the integral frequency conversion controller have major loop and are integrated with the control system of variable frequency motor controller and generator set controller
System, wherein the major loop provides the matched adjustable electric current of frequency, to control the motor speed of compressor；The unit
Controller obtains and analyzes the cooling condition data of each unit equipment transmission, the output of fit object revolving speed temperature control curve
With the matched policy control information of actual condition, and the policy control information is sent to variable frequency motor controller；The change
Frequency electric machine controller, the policy control information that will be received, further to major loop transmission for output electric current
Electric machine frequency adjustment signal complete output frequency adjustable function to adjust the motor speed of compressor.
Preferably, the frequency conversion control board includes: frequency conversion central processing unit, connect, is used for the generator set controller
Receive the policy control information, output and the matched motor speed updated value of actual condition and driving circuit are and described
The connection of frequency conversion central processing unit, is converted into electric machine frequency adjustment signal for the motor speed updated value.
Preferably, further, the variable frequency motor controller, when electric on it, using power supply delay start Preservation tactics,
So that the driving circuit is compared to the frequency conversion central processing unit delayed startup.
Preferably, further, the variable frequency motor controller is protected in its power-off using the power supply delay start
Strategy, so that the frequency conversion central processing unit is compared to the driving circuit delay cut-off.
Preferably, the major loop includes: filter unit, is connect with AC power supply system, for handling peak voltage
With protection rear end power device；Rectification unit is connect with the filter unit, and the ac voltage signal of input is converted into directly
Flow voltage signal；Voltage regulation filtering unit connect with the rectification unit, has filter inductor, for stablizing the direct current
Voltage signal；Precharge unit is connect with the rectification unit, and the on-off of the unit is controlled according to preset voltage predetermined value
State；Auxiliary Power Units connect with the voltage regulation filtering unit and the precharge unit respectively, have power supply delay
Starting protection strategy provides power supply for each control unit；Inversion unit, respectively with the voltage regulation filtering unit, the preliminary filling
Driving circuit connection in electric unit and the variable frequency motor controller, the electricity exported using the driving circuit
Unit frequency adjustment signal provides matched electric current to control the motor speed of compressor.
Preferably, the filter unit further using low-pass filter circuit, filters out front end spike and height
Frequency electromagnetic interference signal.
Preferably, the control system in the integral frequency conversion controller is also equipped with: novel maintenance device, with institute
The connection of frequency conversion central processing unit is stated, unit floor data is transmitted to remote central in real time, wherein the unit operating condition
Data are sent to the cooling condition data of the variable frequency motor controller by the variable-frequency electric by the generator set controller
After machine controller processing, obtained in conjunction with the current motor floor data that the variable frequency motor controller is got；Man-machine friendship
Mutual interface is connect with the generator set controller, inputs the temperature parameter of setting, and monitors feedback data and signal.
Preferably, the major loop is also equipped with: section breaker unit, single with the AC power supply system and the filtering
Member connection, each electrode tip have protection controller respectively, have the passive protection to electrode tip and utilize preset detection
Active control defencive function of the controlling mechanism to the integral frequency conversion controller.
Preferably, the rectification unit selects following types of device: not controlling type device or half control type device, or full control
Type device.
Compared with prior art, one or more embodiments in above scheme can have following advantage or beneficial to effect
Fruit:
The screw machine frequency converter transmission system proposed by the present invention for integrating unit allocation and frequency control integrates compression
Machine frequency control and unit temperature and pressure control, and the control strategy of valve opening, oil pump heating etc. improves unit allocation and becomes
Matching, reliability and the scalability of frequency device reduce the project development period, fast responding market, not only realize the easy of project
With property and reliability, while unit operation efficiency is significantly promoted, responds the policy of national energy conservation and emission reduction.
Although describing the present invention, those skilled in the art hereinafter in connection with some exemplary implementations and application method
Member is it should be appreciated that be not intended to limit the invention to these embodiments.It is on the contrary, it is intended to which that covering is included in appended right and wants
Seek all substitutes, amendment and the equivalent in spirit and scope of the invention defined in book.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.Target and other advantages of the invention can be wanted by following specification, right
Specifically noted structure is sought in book and attached drawing to be achieved and obtained.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the invention
It applies example and is used together to explain the present invention, be not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation of the integral frequency conversion controller for screw rod machine central air-conditioning in the embodiment of the present application
Figure；
Fig. 2 is the specific structure of the integral frequency conversion controller for screw rod machine central air-conditioning in the embodiment of the present application
Block diagram；
Fig. 3 is the revolving speed temperature of the integral frequency conversion controller for screw rod machine central air-conditioning in the embodiment of the present application
Target control curve synoptic diagram；
Fig. 4 is the control switch of the integral frequency conversion controller for screw rod machine central air-conditioning in the embodiment of the present application
The circuit timing diagram of Preservation tactics.
Specific embodiment
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, how to apply to the present invention whereby
Technological means solves technical problem, and the realization process for reaching technical effect can fully understand and implement.It needs to illustrate
As long as not constituting conflict, each feature in each embodiment and each embodiment in the present invention can be combined with each other,
It is within the scope of the present invention to be formed by technical solution.
In order to overcome the above-mentioned deficiencies of the prior art, the present embodiment proposes a kind of highly integrated formula screw machine central air-conditioning
Refrigerant frequency converter, integral compressor frequency control and unit temperature and pressure control, the control plan of valve opening, oil pump heating etc.
Slightly, the ease for use and reliability of project are not only realized, while significantly promoting unit operation efficiency, responds national energy conservation and emission reduction
Policy also uses advanced control circuit switch protection strategy, significantly lifting system reliability.
Fig. 1 is the structural representation of the integral frequency conversion controller for screw rod machine central air-conditioning in the embodiment of the present application
Figure, as shown in Figure 1, the integrated control system that the application is integrated using variable frequency motor controller and generator set controller, integrates
In the integral frequency conversion controller for having major loop and control system.Specifically, the application uses independent frequency control platform
(variable frequency motor controller) and unit refrigeration control platform (generator set controller), has Function Extension interface respectively, can cover more
Wide range of capacity and Function Extension.Wherein, major loop, from front end, AC power supply system takes electricity, by the AC power source of input
After filtering, rectification, pressure stabilizing and inversion processing, power supply is provided for compressor of air conditioner, and it is adjustable to provide matched frequency
Electric current, to control the motor speed of compressor；Generator set controller obtains and analyzes the cooling condition number of each unit equipment transmission
According to the output of, fit object revolving speed temperature control curve and the matched policy control information of actual condition, and by policy control information
It is sent to variable frequency motor controller；Variable frequency motor controller, the policy control information that will be received further are passed to major loop
It is adjustable to complete output frequency to adjust the motor speed of compressor of air conditioner for the defeated electric machine frequency adjustment signal for output electric current
Function.It should be noted that the application is not especially limited for the form of above-mentioned AC power supply system, the input terminal of major loop
It can be three-phase alternating current system, can also be one-way communication system.
Fig. 2 is the specific structure of the integral frequency conversion controller for screw rod machine central air-conditioning in the embodiment of the present application
Block diagram, as shown in Fig. 2, the integral frequency conversion controller includes: section breaker unit 1, filter unit 2, rectification unit 3, pressure stabilizing
Filter unit 4, inversion unit 5, precharge unit 6, Auxiliary Power Units 7, human-computer interaction interface 8, (the unit control of unit allocation plate
Device processed) 9, frequency conversion control board (variable frequency motor controller) 10 and novel maintenance device 11.Wherein, section breaker unit 1, filtering are single
Member 2, rectification unit 3, voltage regulation filtering unit 4, inversion unit 5, precharge unit 6 and Auxiliary Power Units 7 are the one of major loop
A composition example；Meanwhile human-computer interaction interface 8, unit allocation plate (generator set controller) 9, frequency conversion control board (variable-frequency motor control
Device) 10 and novel maintenance device 11 be control system a composition example.
It is illustrated respectively below for each unit.
Section breaker unit 1 is connect with external AC power supply system and filter unit 2, each terminal respectively with protection
Controller connection, is used for guard electrode end and entire back-end circuit.Specifically, section breaker unit has electrode tip and passively protects
Protective function and the preset detection controlling mechanism of utilization provide active control defencive function, excision electricity to integral frequency conversion controller
Net avoids back-end system failure propagation.It further says, when the integral frequency conversion controller system breaks down, by operating
Personnel implement passive protection movement to section breaker unit 1, disconnect all control protectors and/or faulty circuit of the unit 1
The control protector at place；When there is phenomena such as excessive transient current or overload in the circuit where section breaker unit 1 detects,
Using detection controlling mechanism, (data of detection circuit test point judge the test point for failure shape when monitoring data exception
State, digital output protector ON- and OFF- command signal), start active control defencive function, disconnects all controls protection of the unit automatically
The protection controller of terminal where device and/or faulty circuit.It should be noted that in the embodiment of the present application, if integration becomes
Frequency controller does not configure section breaker unit 1, and the application still can normally be implemented, therefore whether the application is to configuring section breaker unit
1 is not especially limited.
Filter unit 2 is connect with front end AC power-supply system or section breaker unit 1, for handle peak voltage and
Protect rear end power device.Specifically, filter unit 2, on the one hand, it can filter out front end spike, to peak voltage into
Row absorbs and release；On the other hand, protection can be provided for rear end power device, filter out high-frequency electromagnetic interference signal guarantee this one
The reliability of body frequency-variable controller.In addition, capacity and topological form of the application also directed to integral frequency conversion controller, design
LC low-pass filter circuit, to filter out the high frequency E MI signal by generating in back-end circuit conversion process, to improve itself
EMC performance.
Rectification unit 3 is connect with filter unit 2, and the ac voltage signal of input is converted into d. c. voltage signal, defeated
Out into intermediate dc circuit, it should be noted that the application is not especially limited for the device selection in rectification unit 3,
It may be selected not controlling device, half control device and wholly-controled device.
Voltage regulation filtering unit 4 connect with rectification unit 3, has filter inductor, exports for stablizing rectification unit 3
D. c. voltage signal, while reducing the side harmonics of input terminal.
Then, precharge unit 6 is illustrated.It connect precharge unit 6 with rectification unit 3, has charging current limiter
Resistance and switch controller, the unit control the on off operating mode of the unit according to preset voltage predetermined value, after protecting
Hold corresponding power supply unit.When real-time voltage reaches the preset value, by switch controller by the charging resistor in the unit 6
It is cut off from circuit.It should be noted that the application is not especially limited for protection voltage preset value, those skilled in the art
It can be adjusted according to actual needs.
Auxiliary Power Units 7 are separately connected with voltage regulation filtering unit 4 and precharge unit 6, DC/DC power module
For a preferable example of the unit 7.Auxiliary Power Units 7 have power supply delay start Preservation tactics, are that each control unit is (outstanding
It is variable-frequency motor control panel) power supply (DC low voltage power supply) is provided.Further say have two-way in Auxiliary Power Units 7
Power branch, when the power initiation, the first power branch first starts, and second source branch postpones compared to the first power branch
Starting, when the power cut-off, second source branch is first powered off, and the first power branch is disconnected compared to second source finger delays
Electricity.Since the unit 7 takes electricity from DC loop, and following frequency conversion central processing units are powered by the first power branch, therefore are worked as
When load power down, the energy that can be stored by the DC support capacitor in parallel with above-mentioned first power branch extends following frequency conversions
The working time of central processing unit, to ensure the normal switching-off and abnormality failure logging of pulse.
Then, to the frequency conversion control board (variable frequency motor controller) 10 and unit allocation plate in the integral frequency conversion controller
(generator set controller) 9 is described in detail.Wherein, generator set controller 9 its respectively with each unit equipment and frequency conversion control board 10
Connection includes that unit temperature classes data, unit pressure class data and unit operate class number by what is received from each unit equipment
Comprehensive point is carried out according to equal cooling condition data and the current compressor motor floor data obtained from frequency conversion control board 10
Analysis, on the one hand, the aperture data of output cold medium flux valve and oil pump fire data etc. control each unit equipment, and will
Cooling condition data, current compressor motor floor data and the two combine the result information of rear comprehensive analysis to be sent to change
Frequency control panel 10；On the other hand, control strategy between frequency conversion control board 10 and the plate of unit allocation plate 9, output and practical work are utilized
The matched policy control information of condition, and policy control information is sent to frequency conversion control board 10.In addition, frequency conversion control board 10,
Including frequency conversion central processing unit (not shown) and driving circuit (not shown), wherein frequency conversion central processing unit and unit allocation plate 9
Connection, for receiving the policy control information, output and the matched motor speed updated value of actual condition；Driving circuit,
It is connect with frequency conversion central processing unit, motor speed updated value is converted into electric machine frequency adjustment signal and is sent to following inversion units
5, to adjust the motor speed of compressor of air conditioner, reach the adjustable effect of output power.
In addition, the current motor frequency signal received from following inversion units 5 can also be converted by driving circuit
Current motor rotary speed data is sent to frequency conversion central processing unit, and then, frequency conversion central processing unit receives working as driving circuit transmission
Front motor rotary speed data, and motor operating principle is utilized, current motor floor data (the motor work for compressor is calculated
Condition data can be used as the data basis for constituting unit floor data in novel maintenance device 11), to be transmitted to generator set controller 9
In, so that generator set controller 9 can obtain the current motor floor data of compressor in real time.
It should be noted that in order to make the integral frequency conversion controller motor control platform and unit allocation platform it is effective
Combine, in generator set controller 9, devise control strategy between frequency conversion control board 10 and the plate of unit allocation plate 9.Its
In, control strategy between plate, firstly, comprehensive analysis is carried out by the historical data to motor floor data and cooling condition data,
Coupling building rotating speed of target temperature control curve, and be written into generator set controller 9.Then, in integral frequency conversion controller
It is real using the cooling water in the cooling condition data of above-mentioned each unit equipment of 9 real-time reception of generator set controller in operational process
Border temperature value with from the motor speed in the current motor floor data obtained in frequency conversion central processing unit, with rotating speed of target temperature
Controlling curve (referring to Fig. 3) is fitted, and makes frequency control and the accurate coupling objectives revolving speed temperature control curve of unit allocation, from
And the motor drive signal digital quantity that output updates, i.e. policy control information, achieve the purpose that accurately to control refrigeration effect.
Fig. 3 is the revolving speed temperature of the integral frequency conversion controller for screw rod machine central air-conditioning in the embodiment of the present application
Target control curve synoptic diagram.As shown in figure 3, specifically, X-axis indicates that temperature difference, Y-axis indicate the tachometer value of setting.Work as unit
After controller 9 gets cooling water current actual temperature value, cooling water actual temperature value is compared to obtain with target temperature
Temperature difference △ T believes to be calculated by above-mentioned revolving speed temperature objectives controlling curve with the matched policy control of actual condition
It ceases (including current motor demand revolving speed calculated value and temperature difference data), wherein target temperature is based on to current refrigeration work
What the comprehensive analysis of condition data obtained.Then, above-mentioned policy control information is sent to the frequency conversion central processing of frequency conversion control board
The pulse data of motor speed updated value is obtained by calculation in device, frequency conversion central processing unit, passes through driving circuit and inversion unit 5
By motor speed updated value adjust to the matched electric machine frequency adjustment signal of revolving speed temperature objectives controlling curve calculated value.It needs
Illustrate, when above-mentioned temperature difference is less than Δ T1, frequency conversion control board controls motor stalling, because temperature-fall period has certain be used to
Property, actual temperature still will drop to target temperature；In addition, frequency conversion control board output is set in advance because of the inherent characteristic of unit and motor
Fixed motor maximum (top) speed value, when temperature difference is greater than Δ T2, motor will be run by maximum (top) speed.
It further says, in order to improve the reliability and stability of integrated variable frequency electric machine controller, above-mentioned variable-frequency motor
Controller 10 is using the power supply delay start Preservation tactics in Auxiliary Power Units 7, so that variable frequency motor controller 10 has out
Close Preservation tactics.Wherein, the first power branch in above-mentioned Auxiliary Power Units 7 is in the frequency conversion in variable frequency motor controller 10
Central processor provides power supply, and above-mentioned second source branch provides power supply for the driving circuit in variable frequency motor controller 10.Wherein,
Fig. 4 is the control switch Preservation tactics of the integral frequency conversion controller for screw rod machine central air-conditioning in the embodiment of the present application
Circuit timing diagram, as shown in figure 4, specifically, when variable frequency motor controller 10 powers on, central processing unit first starts, concurrently
Initialization control pulse is sent, then to drive circuitry, so that driving circuit is compared to frequency conversion central processing unit delayed startup, really
It protects and does not explode even because the mistake of pulse caused by the surge of power up sends to damage so as to cause power device；Work as variable-frequency motor
When controller 10 powers off, the driving circuit of second source branches affect completes deenergizing step in advance, and frequency conversion central processing unit utilizes
The energy of power down moment DC support capacitor storage completes pulse blocking, extends the working time of frequency conversion central processing unit, so that
Frequency conversion central processing unit is compared to driving circuit delay cut-off, to ensure the normal switching-off and abnormality failure logging of pulse,
To protect power device.
Finally, being illustrated to inversion unit 5.Inversion unit 5 its respectively with voltage regulation filtering unit 4, precharge unit 6,
The air conditioner compressed machine equipment connection of driving circuit and outside in frequency conversion control board 10, the frequency exported using above-mentioned driving circuit
The adjustable electric machine frequency adjustment signal of rate provides matched electric current to compressor, to control the motor speed of compressor.
In addition, human-computer interaction interface 8, connect with unit allocation plate 9, the setting value of input temp parameter, and monitoring machine
Outdoor temperature, each unit equipment operating condition data and the Threshold Alerts signal of each unit equipment etc. of group equipment feedback.Far
Cheng Yunwei device 11 connect with above-mentioned frequency conversion central processing unit, unit floor data is transmitted to remote central service in real time
Device, wherein unit floor data is sent to the cooling condition data of variable frequency motor controller 10 by frequency conversion by generator set controller 9
After the processing of electric machine controller 10, obtained in conjunction with the current motor floor data that variable frequency motor controller 9 is got, remote back-office
It monitors unit equipment operating status in real time, is provided by guidance, while after-sale service is substantially improved for maintenance, the maintenance of unit to user
Response degree and accuracy in time.
It should be noted that the external compressor load equipment of the application is different from air-cooled, water-cooling type frequency converter, use is cold
The problems such as matchmaker is cooling, substantially reduces cabinet body volume, solves fan noise, and leak causes systemic contamination, short circuit.
The application integrated form screw machine central air-conditioning refrigerant frequency converter, integral compressor frequency control and unit temperature and pressure
Power control, obtains floor datas and the compressor electric motor floor datas such as temperature, the pressure of unit equipment in real time, flat using frequency conversion
Control strategy between plate between platform and machine group platform realizes that the valve opening to unit equipment, oil pump heat the motor speed updated
Deng further control, not only increase the ease for use and reliability of realization project, while significantly promoting unit operation efficiency, responds
The policy of national energy conservation and emission reduction.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope disclosed by the invention, any changes or substitutions that can be easily thought of by any those skilled in the art, should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Although disclosed herein embodiment it is as above, the content is only to facilitate understanding the present invention and adopting
Embodiment is not intended to limit the invention.Any those skilled in the art to which this invention pertains are not departing from this
Under the premise of the disclosed spirit and scope of invention, any modification and change can be made in the implementing form and in details,
But scope of patent protection of the invention, still should be subject to the scope of the claims as defined in the appended claims.
Claims (9)
1. a kind of integral frequency conversion controller for screw machine central air-conditioning, which is characterized in that the integrated variable frequency control
Device has major loop and is integrated with the control system of variable frequency motor controller and generator set controller, wherein
The major loop provides the matched adjustable electric current of frequency, to control the motor speed of compressor；
The generator set controller obtains and analyzes the cooling condition data of each unit equipment transmission, fit object revolving speed temperature
Controlling curve output and the matched policy control information of actual condition, and the policy control information is sent to variable-frequency motor control
Device processed；
The variable frequency motor controller, the policy control information that will be received further transmit needle to the major loop
Output frequency adjustable function is completed to adjust the motor speed of compressor to the electric machine frequency adjustment signal of output electric current.
2. integral frequency conversion controller according to claim 1, which is characterized in that the variable frequency motor controller includes:
Frequency conversion central processing unit is connect with the generator set controller, for receiving the policy control information, output and reality
The motor speed updated value of Conditions Matching, and
Driving circuit is connect with the frequency conversion central processing unit, and the motor speed updated value is converted into electric machine frequency tune
Save signal.
3. integral frequency conversion controller according to claim 2, which is characterized in that further,
The variable frequency motor controller, when electric on it, using power supply delay start Preservation tactics, so that the driving circuit phase
Compared with the frequency conversion central processing unit delayed startup.
4. integral frequency conversion controller according to claim 2 or 3, which is characterized in that further,
The variable frequency motor controller, in its power-off, using the power supply delay start Preservation tactics, so that in the frequency conversion
Central processor is compared to the driving circuit delay cut-off.
5. integral frequency conversion controller according to any one of claims 1 to 4, which is characterized in that the major loop packet
It includes:
Filter unit is connect with AC power supply system, for handling peak voltage and protection rear end power device；
Rectification unit is connect with the filter unit, and the ac voltage signal of input is converted into d. c. voltage signal；
Voltage regulation filtering unit connect with the rectification unit, has filter inductor, for stablizing the DC voltage letter
Number；
Precharge unit is connect with the rectification unit, and the on off operating mode of the unit is controlled according to preset voltage predetermined value；
Auxiliary Power Units connect with the voltage regulation filtering unit and the precharge unit respectively, have power supply delay
Starting protection strategy provides power supply for each control unit；
Inversion unit, respectively and in the voltage regulation filtering unit, the precharge unit and the variable frequency motor controller
The driving circuit connection, using the driving circuit export the electric machine frequency adjustment signal, matched electric current is provided
To control the motor speed of compressor.
6. integral frequency conversion controller according to any one of claims 1 to 5, which is characterized in that the filter unit,
It further uses low-pass filter circuit, filters out front end spike and high-frequency electromagnetic interference signal.
7. integral frequency conversion controller described according to claim 1~any one of 6, which is characterized in that the integration becomes
The control system in frequency controller is also equipped with:
Novel maintenance device connect with the frequency conversion central processing unit, unit floor data is transmitted to remote central in real time
Server, wherein the unit floor data is sent to the system of the variable frequency motor controller by the generator set controller
Cold floor data is after variable frequency motor controller processing, the current electricity that gets in conjunction with the variable frequency motor controller
Machine floor data obtains；
Human-computer interaction interface is connect with the generator set controller, inputs the temperature parameter of setting, and monitors feedback data and letter
Number.
8. integral frequency conversion controller according to claim 5, which is characterized in that the major loop is also equipped with:
Section breaker unit is connect with the AC power supply system and the filter unit, and each electrode tip has guarantor respectively
Controller is protected, have to the passive protection of electrode tip and the integrated variable frequency is controlled using preset detection controlling mechanism
The active control defencive function of device.
9. integral frequency conversion controller described according to claim 1~any one of 8, which is characterized in that the rectification unit
Select following types of device:
Type device is not controlled, or
Half control type device, or
Wholly-controled device.
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| CN201711338804.2A CN109959129A (en) | 2017-12-14 | 2017-12-14 | A kind of integral frequency conversion controller for screw machine central air-conditioning |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114362179A (en) * | 2021-11-25 | 2022-04-15 | 科希曼电器有限公司 | Air source heat pump suitable for rural low-voltage of low temperature |
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| CN1937346A (en) * | 2006-09-13 | 2007-03-28 | 沈阳铝镁设计研究院 | Power-supply rectifying system at direct current side with protection device |
| JP2009189106A (en) * | 2008-02-04 | 2009-08-20 | Mitsubishi Heavy Ind Ltd | Apparatus and method for motor control |
| CN103277875A (en) * | 2013-06-21 | 2013-09-04 | 上海能誉科技发展有限公司 | Energy-saving control system for refrigeration plant room |
| CN204327463U (en) * | 2014-05-29 | 2015-05-13 | 金西盟（北京）仪器有限公司 | A kind of delayed startup compressor |
| CN105318460A (en) * | 2015-10-15 | 2016-02-10 | 珠海格力电器股份有限公司 | Control system, control method and water chilling unit applying control system and control method |
| CN206461538U (en) * | 2017-01-12 | 2017-09-01 | 株洲中车时代电气股份有限公司 | A kind of screw machine central air-conditioning synchronous motor Variable Frequency Drives |
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