CN101192807A - An intelligent controller for DC frequency conversion compressor and its control method - Google Patents
An intelligent controller for DC frequency conversion compressor and its control method Download PDFInfo
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Abstract
The invention discloses an intelligent controller for a direct current variable-frequency compressor, which comprises a kernel control module, a variable-frequency contravariant module and a power factor correction module. The kernel control module is used for controlling the variable-frequency contravariant module and the power factor correction module; the variable-frequency contravariant module is used for driving the compressor in sinusoidal direct current variable-frequency; the power factor correction module is used for correcting the power factor of a variable-frequency air conditioning system. The invention also discloses an intelligence control method for a direct current variable-frequency compressor. First, the kernel control module is communicated with an upper machine to pass relevant information; then the compressor is derived by the variable-frequency contravariant module through sinusoidal direct current variable-frequency; at last the power factor of the variable-frequency air conditioning system is corrected. The invention achieves a variable-frequency control for the vector of the direct current variable-frequency compressor and a power factor correction of the variable-frequency air conditioning, and extends the versatility of the direct current variable-frequency controller and improves the power factor of the air conditioning system.
Description
Technical field
The present invention relates to the DC frequency converting air-conditioner technical field, particularly relate to a kind of intelligent controller for DC frequency conversion compressor and control method thereof.
Background technology
Along with the arrival of energy crisis in the world wide, national governments are all promoting energy-saving and cost-reducing technology energetically for the purpose of sustainable economic development.Capital equipment as household electricity, direct current varied-frequency air conditioner more and more is subjected to liking of users because of characteristics such as good energy-conservation, accurate temperature controlling, ultralow temperature start, heat fast, and DC frequency converting air-conditioner also must become the developing direction of air-conditioning technical.
In the DC frequency converting air-conditioner technical field, come branch to have two kinds by the compressor controlling schemes, a kind of is with the scheme of 120 degree controls, is the trapezoidal wave controlling schemes again, and this control mode is simple, parameter dependence to compressor is low, but this control mode is low to the utilization ratio of compressor, and frequency characteristic is poor, and low-frequency vibration is big, high-frequency noise is big, can not well bring into play the advantage of DC frequency-changeable compressor; Another kind of control mode is 180 degree controlling schemes, is sine DC frequency conversion controlling schemes or vector DC frequency-changing controlling schemes again.This controlling schemes does not need not conducting phase when the detection rotor position, the frequency conversion drive pattern is spent sinusoidal wave DC frequency-changing pattern with 180, has improved the service efficiency of compressor greatly, and the frequency characteristic of this control mode also is much better than 120 degree control modes.But 180 degree DC frequency-changing control technology difficulty are big, need set up complicated mathematical model, need to use high-speed chip just can finish related operation, and 180 the degree control mode strong to the parameter dependence of compressor, so use the versatility of DC variable frequency air conditioner controller of this control mode very poor, a general controller can only be controlled a compressor.
In the convertible frequency air-conditioner, its power prime generally all adopts diode full-bridge rectification mode, causes harmonic pollution in electric power net, and power factor descends.The basic reason that harmonic wave produces is because due to the nonlinear load.When electric current is flowed through load, with the non-linear relation of added voltage, just form non-sinusoidal current, thereby produce harmonic wave.In the air-conditioning frequency-changing control system, the AC power of 220VAC is through rectifier bridge rectification, high power transistor inversion, and the result produces the electric current high order harmonic component in the input and output loop.Current harmonics can cause the serious distortion of line voltage; Cable and wire is overheated, and ageing of insulation is quickened, and damages and causes short-circuit between conductors and earth fault and cause appliance fire and personal shock hazard; Flat wave capacitor device after the rectification is overheated, fragile, and the life-span is short; Harm such as the power factor reduction of system cause potential hazard to the safe operation of electrical network and other power consumption equipments.Because the use of convertible frequency air-conditioner has a large capacity and a wide range, its harm is more serious.So a perfect convertible frequency air-conditioner control system needs harmonic wave and suppresses and the power factor correction scheme, be applied to go in the convertible frequency air-conditioner to realize its power factor correction, DC frequency-changing scheme originally generally adopts the method for secondary power factor correction module to solve this problem, the power factor correction module needs the very expensive special integrated circuit of price to control, thereby increased the cost of convertible frequency air-conditioner scheme, reduced the market competitiveness.
Summary of the invention
The problem to be solved in the present invention provides a kind of intelligent controller for DC frequency conversion compressor and control method thereof, realizes the vector converter control of DC frequency-changeable compressor and the power factor correction of convertible frequency air-conditioner.
For achieving the above object, the technical scheme of embodiments of the invention proposes a kind of intelligent controller for DC frequency conversion compressor, comprises a kernel control module, a frequency conversion inversion module and a power factor correction module; Described kernel control module is used to control described frequency conversion inversion module and described power factor correction module; Described frequency conversion inversion module is used for the sine DC frequency conversion Driven Compressor; Described power factor correction module, the power factor that is used to correct frequency-conversion air-conditioning system.
Described kernel control module comprises communication control unit, is used to realize the communication of information between described kernel control module and the host computer.
Described frequency conversion inversion module further comprises intelligent frequency-conversion unit and control unit; Described control unit further comprises current detecting analysis subelement and position calculation and frequency conversion sequencing control subelement, and described current detecting is analyzed subelement, is used for detecting and the isolated-phase buses electric current, calculates the three-phase current of compressor according to described bus current; Described position calculation and frequency conversion sequencing control subelement are used for according to described three-phase current, calculate the positional information and the velocity information of rotor, control the electric current of described intelligent frequency-conversion unit output, and then sine DC frequency conversion drive described compressor.
Described power factor correction module is used for producing electric current on minor loop, makes this electric current be transported to the flat wave capacitor end by diode, with the current waveform of AC power in advance, improves the current harmonics in the power supply.
Described communication control unit comprises that further communication data receives subelement, communication data output subelement and communication clock and receives subelement, and described subelement is respectively applied for the communication of the information of carrying out with host computer.
Described subelement is respectively applied for host computer and carries out in the communication of information, and described communication employing baud rate is 1200 serial peripheral equipment interface SPI communication mode.
Described subelement is respectively applied for host computer and carries out in the communication of information, and described information comprises the parameter and the control command of compressor.
Described kernel control module adopts 32 single-chip microcomputers.
For achieving the above object, the technical scheme of embodiments of the invention proposes a kind of DC frequency-changeable compressor intelligence control method, may further comprise the steps:
A, kernel control module and upper machine communication transmit relevant information;
B, frequency conversion inversion module are by the sine DC frequency conversion Driven Compressor;
C, the power factor of correcting frequency-conversion air-conditioning system.
In the described steps A, the relevant information of transmitting between described kernel control module and the host computer comprises the parameter and the control command of compressor.
Described step B further may further comprise the steps:
B1, detection and isolated-phase buses electric current, the three-phase current of calculating compressor;
B2, according to described three-phase current, utilize the positional information and the velocity information of calculation of parameter compressor drum of the compressor of described operation, the electric current of control intelligent frequency-conversion unit output;
B3, according to the described compressor of current drives of described intelligent frequency-conversion unit output.
Described step C further may further comprise the steps:
C1, forward voltage also deficiency insulated gate is double-clicked type field effect transistor IGBT conducting so that during the conducting of major loop rectifier bridge, carry out pulse width modulation (PWM) control;
Produce electric current on C2, the minor loop, described electric current storage power on energy storage inductor;
C3, after reaching by the numerical value of system decision, turn-offs in described electric current insulated gate double-click type field effect transistor IGBT;
C4, the electric current that described inductance is stored are transported to the flat wave capacitor end by diode;
C5, repeatedly conducting and close insulated gate double-click type field effect transistor IGBT;
C6, in advance with the current waveform of AC power.
The technical scheme of embodiments of the invention has realized the vector converter control of DC frequency-changeable compressor and the power factor correction of convertible frequency air-conditioner by intelligent controller and control method thereof, make the versatility of DC variable frequency air conditioner controller wider, improved the power factor of air-conditioning system.
Description of drawings
Fig. 1 is the current waveform of 180 degree sine DC frequency conversion Driven Compressor;
Fig. 2 is current waveform and the power factor correction module control signal waveform after the power factor correction module is proofreaied and correct among the present invention;
Fig. 3 is the structural representation of intelligent controller for DC frequency conversion compressor of the present invention;
Fig. 4 is the embodiment flow chart of DC frequency-changeable compressor intelligence control method of the present invention.
Embodiment
About feature of the present invention and practical application, existing conjunction with figs. is described in detail as follows as most preferred embodiment:
A kind of intelligent controller for DC frequency conversion compressor of the present invention comprises kernel control module 2, frequency conversion inversion module 1 and power factor correction module 3 as shown in Figure 3.Wherein, kernel control module 2 adopts 32 single-chip microcomputers, is used for control of conversion inversion module 1 and power factor correction module 3; Kernel control module 2 further comprises communication control unit 21, is used to realize the communication of information between kernel control module 2 and the host computer; Communication control unit 21 comprises that further the communication clock receives subelement 213, communication data receives subelement 211 and communication data output subelement 212, described subelement is respectively applied for the communication of the information of carrying out with host computer, described information comprises the parameter and the control command of compressor, its communication employing baud rate is 1200 SPI (Serial Peripheral Interface, Serial Peripheral Interface (SPI)) communication mode.Frequency conversion inversion module 1, be used for the sine DC frequency conversion Driven Compressor, it further comprises intelligent frequency-conversion unit 11 and control unit 12, control unit 12 further comprises current detecting analysis subelement 121 and position calculation and frequency conversion sequencing control subelement 122, wherein, current detecting is analyzed subelement 121, is used for detecting and the isolated-phase buses electric current, calculates the three-phase current of compressor according to described bus current; Position calculation and frequency conversion sequencing control subelement 122 are used for according to described three-phase current, calculate the positional information and the velocity information of rotor, the electric current of control intelligent frequency-conversion unit 11 outputs, and then sine DC frequency conversion drives described compressor.Power factor correction module 3 is used for producing electric current on minor loop, makes this electric current be transported to the flat wave capacitor end by diode, with the current waveform of AC power in advance, improves the current harmonics in the power supply, thereby corrects the power factor of frequency-conversion air-conditioning system.
Embodiment one, and when adopting intelligent controller for DC frequency conversion compressor shown in Figure 3, the flow process of DC frequency-changeable compressor intelligence control method of the present invention the present invention includes following steps as shown in Figure 4:
Step S101, kernel control module 2 receives subelement 213, communication data reception subelement 211 and communication data output subelement 212 and upper machine communication by the communication clock in the communication control unit 21, transmit relevant information, described relevant information comprises the parameter and the control command of compressor.
Step S102, frequency conversion inversion module 1 is by the sine DC frequency conversion Driven Compressor, and step S102 further may further comprise the steps:
Current detecting is analyzed subelement 121 and is detected and the isolated-phase buses electric current, calculates the three-phase current of compressor;
Position calculation and frequency conversion sequencing control subelement 122 utilize the parameter of vector control theory and described compressor according to described three-phase current, calculate the positional information and the velocity information of rotor, the electric current of control intelligent frequency-conversion unit 11 outputs;
Frequency conversion inversion module 1 drives described compressor operation according to the current sinusoidal DC frequency-changing of described intelligent frequency-conversion unit 11 outputs.
Step S103, the power factor of correcting frequency-conversion air-conditioning system, step S103 further may further comprise the steps:
Power factor correction module 3 forward voltage also deficiency so that during the conducting of major loop rectifier bridge, carry out PWM (Pulse Width Modulation, pulse width modulation) control is with IGBT (Insulated GateBipolar Transistor, igbt) conducting;
On minor loop, produce electric current, described electric current storage power on energy storage inductor;
After electric current reaches numerical value by system decision, turn-off IGBT;
3 controls of power factor correction module are transported to the flat wave capacitor end with the electric current that described inductance stores by diode;
Power factor correction module 3 is controlled repeatedly conducting and is closed IGBT;
The current waveform of AC power is shifted to an earlier date, improve the current harmonics in the power supply.
Though the present invention discloses as above with aforesaid preferred embodiment; right its is not in order to limiting the present invention, anyly has the knack of alike skill person, without departing from the spirit and scope of the present invention; when doing a little change and retouching, these change with retouching also should be considered as protection scope of the present invention.
Claims (12)
1. intelligent controller for DC frequency conversion compressor is characterized in that: comprise a kernel control module, a frequency conversion inversion module and a power factor correction module,
Described kernel control module is used to control described frequency conversion inversion module and described power factor correction module;
Described frequency conversion inversion module is used for the sine DC frequency conversion Driven Compressor;
Described power factor correction module, the power factor that is used to correct frequency-conversion air-conditioning system.
2. a kind of intelligent controller for DC frequency conversion compressor as claimed in claim 1 is characterized in that described kernel control module comprises communication control unit, is used to realize the communication of information between described kernel control module and the host computer.
3. a kind of intelligent controller for DC frequency conversion compressor as claimed in claim 1 is characterized in that, described frequency conversion inversion module further comprises intelligent frequency-conversion unit and control unit,
Described control unit further comprises current detecting analysis subelement and position calculation and frequency conversion sequencing control subelement;
Wherein, described current detecting is analyzed subelement, is used for detecting and the isolated-phase buses electric current, calculates the three-phase current of compressor according to described bus current;
Described position calculation and frequency conversion sequencing control subelement are used for according to described three-phase current, calculate the positional information and the velocity information of rotor, control the electric current of described intelligent frequency-conversion unit output, and then sine DC frequency conversion drive described compressor.
4. a kind of intelligent controller for DC frequency conversion compressor as claimed in claim 1, it is characterized in that, described power factor correction module, be used on minor loop, producing electric current, make this electric current be transported to the flat wave capacitor end by diode, the current waveform of AC power is shifted to an earlier date, improve the current harmonics in the power supply.
5. a kind of intelligent controller for DC frequency conversion compressor as claimed in claim 2, it is characterized in that, described communication control unit comprises that further communication data receives subelement, communication data output subelement and communication clock and receives subelement, and described subelement is respectively applied for the communication of the information of carrying out with host computer.
6. a kind of intelligent controller for DC frequency conversion compressor as claimed in claim 5 is characterized in that, described subelement is respectively applied for host computer and carries out in the communication of information, and described communication employing baud rate is 1200 serial peripheral equipment interface SPI communication mode.
7. a kind of intelligent controller for DC frequency conversion compressor as claimed in claim 5 is characterized in that, described information comprises the parameter and the control command of compressor.
8. a kind of intelligent controller for DC frequency conversion compressor as claimed in claim 1 or 2 is characterized in that, described kernel control module adopts 32 single-chip microcomputers.
9. a DC frequency-changeable compressor intelligence control method is characterized in that, may further comprise the steps:
A, kernel control module and upper machine communication transmit relevant information;
B, frequency conversion inversion module are by the sine DC frequency conversion Driven Compressor;
C, the power factor of correcting frequency-conversion air-conditioning system.
10. as a kind of DC frequency-changeable compressor intelligence control method as described in the claim 9, it is characterized in that in the described steps A, the relevant information of transmitting between described kernel control module and the host computer comprises the parameter and the control command of compressor.
11. a kind of DC frequency-changeable compressor intelligence control method as claimed in claim 9 is characterized in that described step B further may further comprise the steps:
B1, detection and isolated-phase buses electric current, the three-phase current of calculating compressor;
B2, according to described three-phase current, utilize the positional information and the velocity information of calculation of parameter compressor drum of the compressor of described operation, the electric current of control intelligent frequency-conversion unit output;
B3, according to the described compressor of current drives of described intelligent frequency-conversion unit output.
12. a kind of DC frequency-changeable compressor intelligence control method as claimed in claim 9 is characterized in that described step C further may further comprise the steps:
C1, forward voltage also deficiency insulated gate is double-clicked type field effect transistor IGBT conducting so that during the conducting of major loop rectifier bridge, carry out pulse width modulation (PWM) control;
Produce electric current on C2, the minor loop, described electric current storage power on energy storage inductor;
C3, after reaching by the numerical value of system decision, turn-offs in described electric current insulated gate double-click type field effect transistor IGBT;
C4, the electric current that described inductance is stored are transported to the flat wave capacitor end by diode;
C5, repeatedly conducting and close insulated gate double-click type field effect transistor IGBT;
C6, in advance with the current waveform of AC power.
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| CNA2006101449992A CN101192807A (en) | 2006-11-29 | 2006-11-29 | An intelligent controller for DC frequency conversion compressor and its control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834559A (en) * | 2010-05-25 | 2010-09-15 | 中山职业技术学院 | Phase-shifting output system of frequency converter of home appliance compressor and implementing method thereof |
| CN107078684A (en) * | 2014-09-24 | 2017-08-18 | 因温特奥股份公司 | Transport equipment for persons with least one inverter |
| CN109915946A (en) * | 2019-03-21 | 2019-06-21 | 广东美的制冷设备有限公司 | Electric control gear, outdoor unit and air conditioner |
-
2006
- 2006-11-29 CN CNA2006101449992A patent/CN101192807A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834559A (en) * | 2010-05-25 | 2010-09-15 | 中山职业技术学院 | Phase-shifting output system of frequency converter of home appliance compressor and implementing method thereof |
| CN101834559B (en) * | 2010-05-25 | 2012-02-29 | 中山职业技术学院 | Phase-shifting output system of frequency converter of home appliance compressor and implementing method thereof |
| CN107078684A (en) * | 2014-09-24 | 2017-08-18 | 因温特奥股份公司 | Transport equipment for persons with least one inverter |
| CN109915946A (en) * | 2019-03-21 | 2019-06-21 | 广东美的制冷设备有限公司 | Electric control gear, outdoor unit and air conditioner |
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