CN203100066U - Direct-current variable frequency air conditioner and control system thereof - Google Patents
Direct-current variable frequency air conditioner and control system thereof Download PDFInfo
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- CN203100066U CN203100066U CN 201320017099 CN201320017099U CN203100066U CN 203100066 U CN203100066 U CN 203100066U CN 201320017099 CN201320017099 CN 201320017099 CN 201320017099 U CN201320017099 U CN 201320017099U CN 203100066 U CN203100066 U CN 203100066U
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Abstract
The utility model belongs to the technical field of air conditioners, and particularly relates to a direct-current variable frequency air conditioner and a control system thereof. By means of a high-frequency injection method controller, an FOC controller and a voltage space vector modulator in a variable frequency control module, in a normal FOC control mode, the high-frequency injection method controller stops, only the FOC controller works, and therefore high-frequency stable operation of a motor is achieved. In a high-frequency injection method control mode, the high-frequency injection method controller starts, and therefore ultralow-frequency stable operation of the motor is achieved. According to the control system of the direct-current variable frequency air conditioner, seamless switching of the normal FOC control mode and the high-frequency injection method control mode is achieved, continuous and stable operation of the motor from ultralow frequency to high frequency is achieved, and therefore use comfort and energy-saving performance of the direct-current variable frequency air conditioner are improved.
Description
Technical field
The utility model belongs to air-conditioning technical field, relates in particular to a kind of DC frequency converting air-conditioner and control system thereof.
Background technology
Existing DC frequency converting air-conditioner control system, but the drive compression machine turns round in the scope of 1Hz～150Hz, when room temperature has satisfied default temperature conditions, needs compressor with low frequency operation more, can only stop compressor, when treating that room temperature and preset temperature satisfy certain difference, restart compressor again.Stopping compressor to this section of restarting compressor electric motor in the period, the temperature fluctuation in room strengthens relatively, has influenced the comfortableness that DC frequency converting air-conditioner uses.
On the other hand, existing DC frequency converting air-conditioner control system generally can not realize the interval continuous ultralow frequency operation of 0～1Hz, and when compressor starts again, often use the startup method of rotating speed open loop: promptly the moving compressor electric motor of pioneer runs to the interval of 10Hz～30Hz, switches to the state of speed closed loop again.Therefore produce relatively large starting current and start noise, reduced the comfort and the energy saving of DC frequency converting air-conditioner equally.
A kind of DC frequency converting air-conditioner control system of ultralow frequency operation is provided in the prior art, between low frequency range, has exported the sine wave of fixed current and frequency to compressor.Owing to can not detect the actual running speed of compressor under this state, so can not guarantee the stable operation of compressor; And in case enter between low frequency range, can not directly accelerate to again between high frequency region, must shut down earlier, restart compressor then, so the continuous operation between can not really realizing from 0Hz to the high frequency region.
The utility model content
In view of above-mentioned technical problem, the purpose of this utility model at first is to provide a kind of DC frequency converting air-conditioner control system, is intended to solve existing DC frequency converting air-conditioner control system and can not realizes the directly continuous technical problem to the high frequency section operation of 0～1Hz ultralow frequency operation.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of DC frequency converting air-conditioner control system comprises the power factor correction module, VFC module and the power inverter module that are connected between AC power and the compressor electric motor, comprising:
The output high voltage signal, determine the position of rotor by the current signal that detects described motor, to control the high frequency injection method controller of described motor stable operation under 0～1Hz low frequency;
Export the FOC controller of conventional voltage signal, the stable operation of the described motor high frequency of control; And
Link to each other with the output of described high frequency injection method controller, the output of FOC controller respectively, export the space vector of voltage modulator of six road pwm control signals to described power inverter module.
Further, described DC frequency converting air-conditioner control system also comprises: link to each other with described VFC module, power inverter module simultaneously, the current signal of described motor is fed back to the sampling resistor R1 of the FOC closed-loop control of described VFC module, the described motor of realization.
Further, described DC frequency converting air-conditioner control system also comprises: be connected in parallel on described VFC module two ends, reduce the energy-storage travelling wave tube of DC bus-bar voltage ripple.
Particularly, described energy-storage travelling wave tube is electrochemical capacitor E1.
Further, described DC frequency converting air-conditioner control system also comprises: be connected between described AC power and the power factor correction module, AC rectification is become galvanic rectification module.
Particularly, the rectifier bridge of described rectification module for constituting by four diodes.
The purpose of this utility model also is to provide a kind of DC frequency converting air-conditioner, and this DC frequency converting air-conditioner comprises the DC frequency converting air-conditioner control system under as above arbitrary form.
DC frequency converting air-conditioner that the utility model provides and control system thereof, by high frequency injection method controller, FOC controller and the space vector of voltage modulator in the VFC module, under conventional FOC control model, high frequency injection method controller stops, have only the work of FOC controller, can realize the high frequency stable operation of motor; Under high frequency injection method control model, high frequency injection method controller starts, and can realize the stable operation of motor ultralow frequency.By this Novel DC convertible frequency air-conditioner control system, realize the seamless switching of conventional FOC control model and high frequency injection method control model, realize lasting, the stable operation of motor from the ultralow frequency to the high frequency, and then improve the comfort and the energy saving of DC frequency converting air-conditioner.
Description of drawings
Fig. 1 is the structured flowchart of the DC frequency converting air-conditioner control system that provides of the utility model embodiment;
Fig. 2 is the structured flowchart of VFC module in the DC frequency converting air-conditioner control system that provides of the utility model embodiment;
Fig. 3 is the control realization flow figure of VFC module in the DC frequency converting air-conditioner control system that provides of the utility model embodiment.
The specific embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The utility model embodiment at first provides a kind of DC frequency converting air-conditioner control system, can realize lasting, the stable operation of motor from 0～1Hz ultralow frequency to high frequency, and then improves the comfort and the energy saving of DC frequency converting air-conditioner.Fig. 1 is the structured flowchart of the DC frequency converting air-conditioner control system that provides of the utility model embodiment; For convenience of explanation, only show the part relevant with present embodiment.
Referring to Fig. 1, the DC frequency converting air-conditioner control system comprises power factor correction module 100, VFC module 200 and the power inverter module 300 that is connected in turn between AC power AC and the compressor electric motor;
Wherein, power factor correction module 100 is used to improve the power factor of DC frequency converting air-conditioner; VFC module 200 is used to control the seamless switching of realization 0～1Hz ultralow frequency control model to the high frequency operational mode, to power inverter module 300 outputs six road pwm control signals; 300 of power inverter modules are three-phase alternating current with dc inverter, in order to the dynamo-electric machine of drive compression.
When specific implementation, VFC module 100 is a VFC MCU, and its structure is formed as shown in Figure 2.Fig. 2 shows the structured flowchart of the VFC module MCU that a preferred embodiment provides, as shown in the figure:
VFC module MCU comprises: high frequency injection method controller 10, FOC(Field OrientedControl, a directed control) controller 20 and the space vector of voltage modulator 30 that links to each other with the output of the output of high frequency injection method controller 10, FOC controller 20 respectively; Wherein, high frequency injection method controller 10 is used for the output high voltage signal, can determine the position of rotor by the current signal that detects compressor electric motor, with the stable operation under 0～1Hz low frequency of control motor, FOC controller 20 is used to export conventional voltage signal, the stable operation of control compressor electric motor high frequency, and 30 of space vector of voltage modulators can be exported six road pwm control signals to described power inverter module 300.
Continuation is referring to Fig. 1, as a preferred embodiment of the present utility model, the DC frequency converting air-conditioner control system comprises that also the sampling resistor R1. sampling resistor R1 that links to each other with VFC module 200, power inverter module 300 simultaneously is used for the current signal of compressor electric motor is fed back to the FOC closed-loop control of VFC module 200, realization motor.
When specific implementation, the DC frequency converting air-conditioner control system also comprises and is connected in parallel on VFC module 200 two ends, is used to reduce the energy-storage travelling wave tube of DC bus-bar voltage ripple.As a preferred embodiment of the present utility model, energy-storage travelling wave tube shown in Figure 1 is electrochemical capacitor E1.
Continuation is referring to Fig. 1, and the DC frequency converting air-conditioner control system also comprises and being connected between AC power AC and the power factor correction module 100, and AC rectification is become galvanic rectification module.As a preferred embodiment of the present utility model, when specific implementation, the rectifier bridge B1 of rectification module for constituting by four diodes.
The VFC module 200 that the utility model embodiment provides has two kinds of mode of operations: conventional FOC control model and high frequency injection method control model.Wherein, under the conventional FOC control model, high frequency injection method controller 10 stops, and has only 20 work of FOC controller, can realize the high frequency stable operation of motor; Under the high frequency injection method control model, high frequency injection method controller 10 starts, and can realize the stable operation of motor ultralow frequency.That is to say, VFC module MCU can be between conventional FOC control model and high frequency injection method control model seamless switching, realize the stable continuous service of motor from the ultralow frequency to the high frequency.
Fig. 3 shows the control realization flow sketch of VFC module 200.As shown in the figure:
In step S21: judge whether electric motor starting is finished,, otherwise remain on step S21 if finish then enter step S22.
In step S22: judge that whether running frequency is preset value greater than F1(F1, generally get its scope and be 3Hz～20Hz); If greater than F1, then enter step S23, otherwise enter step S24.
In step S23: close the high frequency injection method, VFC module MCU is operated in conventional FOC control model, returns step S22 at last.
In step S24: start the high frequency injection method, VFC module MCU is operated in high frequency injection method control model, returns step S22 at last.
The DC frequency converting air-conditioner control system that provides according to the utility model embodiment, after the high frequency injection method of VFC module 200 is opened, can reach the running frequency minimum of a value is 0～1Hz, frequency resolution is 0.1Hz, and the compressor electric motor of really realizing DC frequency converting air-conditioner is by lasting, the stable operation of ultralow frequency to high frequency.
DC frequency converting air-conditioner that the utility model provides and control system thereof, by high frequency injection method controller, FOC controller and the space vector of voltage modulator in the VFC module, under conventional FOC control model, high frequency injection method controller stops, have only the work of FOC controller, can realize the high frequency stable operation of motor; Under high frequency injection method control model, high frequency injection method controller starts, and can realize the stable operation of motor ultralow frequency.By this Novel DC convertible frequency air-conditioner control system, realize the seamless switching of conventional FOC control model and high frequency injection method control model, realize lasting, the stable operation of motor from the ultralow frequency to the high frequency, and then improve the comfort and the energy saving of DC frequency converting air-conditioner.
The above only is preferred embodiment of the present utility model, not in order to restriction the utility model, although the utility model has been carried out more detailed explanation with reference to previous embodiment, for a person skilled in the art, it still can make amendment or part technical characterictic wherein is equal to replacement the technical scheme that aforementioned each embodiment put down in writing.All any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (7)
1. a DC frequency converting air-conditioner control system comprises the power factor correction module, VFC module and the power inverter module that are connected between AC power and the compressor electric motor, it is characterized in that described VFC module comprises:
The output high voltage signal, determine the position of rotor by the current signal that detects described motor, to control the high frequency injection method controller of described motor stable operation under 0～1Hz low frequency;
Export the FOC controller of conventional voltage signal, the stable operation of the described motor high frequency of control; And
Link to each other with the output of described high frequency injection method controller, the output of FOC controller respectively, export the space vector of voltage modulator of six road pwm control signals to described power inverter module.
2. DC frequency converting air-conditioner control system as claimed in claim 1 is characterized in that, described DC frequency converting air-conditioner control system also comprises:
Link to each other with described VFC module, power inverter module simultaneously, the current signal of described motor is fed back to the sampling resistor R1 of the FOC closed-loop control of described VFC module, the described motor of realization.
3. DC frequency converting air-conditioner control system as claimed in claim 2 is characterized in that, described DC frequency converting air-conditioner control system also comprises:
Be connected in parallel on described VFC module two ends, reduce the energy-storage travelling wave tube of DC bus-bar voltage ripple.
4. DC frequency converting air-conditioner control system as claimed in claim 3 is characterized in that, described energy-storage travelling wave tube is electrochemical capacitor E1.
5. DC frequency converting air-conditioner control system as claimed in claim 1 is characterized in that, described DC frequency converting air-conditioner control system also comprises:
Be connected between described AC power and the power factor correction module, AC rectification is become galvanic rectification module.
6. DC frequency converting air-conditioner control system as claimed in claim 5 is characterized in that, the rectifier bridge of described rectification module for being made of four diodes.
7. a DC frequency converting air-conditioner is characterized in that, described DC frequency converting air-conditioner comprises each described DC frequency converting air-conditioner control system as claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320017099 CN203100066U (en) | 2013-01-14 | 2013-01-14 | Direct-current variable frequency air conditioner and control system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320017099 CN203100066U (en) | 2013-01-14 | 2013-01-14 | Direct-current variable frequency air conditioner and control system thereof |
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| CN203100066U true CN203100066U (en) | 2013-07-31 |
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| CN 201320017099 Expired - Lifetime CN203100066U (en) | 2013-01-14 | 2013-01-14 | Direct-current variable frequency air conditioner and control system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108282129A (en) * | 2018-03-06 | 2018-07-13 | 珠海格力电器股份有限公司 | Driven compressor control circuit, method and the transducer air conditioning for including the circuit |
-
2013
- 2013-01-14 CN CN 201320017099 patent/CN203100066U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108282129A (en) * | 2018-03-06 | 2018-07-13 | 珠海格力电器股份有限公司 | Driven compressor control circuit, method and the transducer air conditioning for including the circuit |
| CN108282129B (en) * | 2018-03-06 | 2024-04-26 | 珠海格力电器股份有限公司 | Compressor driving control circuit and method and variable frequency air conditioner comprising circuit |
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Granted publication date: 20130731 |