CN202535303U - Compressor driving device used for variable-frequency air conditioner - Google Patents
Compressor driving device used for variable-frequency air conditioner Download PDFInfo
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- CN202535303U CN202535303U CN2012201943822U CN201220194382U CN202535303U CN 202535303 U CN202535303 U CN 202535303U CN 2012201943822 U CN2012201943822 U CN 2012201943822U CN 201220194382 U CN201220194382 U CN 201220194382U CN 202535303 U CN202535303 U CN 202535303U
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Abstract
The embodiment of the utility model provides a compressor driving device used for a variable-frequency air conditioner. The compressor driving device includes a speed regulator, a q-axis current regulator, a d-axis current regulator, a first torque control unit, a second torque control unit, a third torque control unit, a voltage coordinate inverse transformation unit, a current coordinate transformation unit, a rotation speed estimation unit, a flux-weakening control unit and a direct current bus voltage control unit. The compressor driving device provided by the embodiment of the utility model can inhibit vibration in low-speed operation of a motor, reduce current fluctuation in intermediate-speed operation of the motor, and automatically adjust direct current voltage in high-speed operation of the motor for providing most appropriate voltage for the system, thereby further improving comprehensive efficiency of the system.
Description
Technical field
The utility model relates to the Compressor Technology field, especially relates to the drive unit of a kind of convertible frequency air-conditioner with compressor.
Background technology
At present, generally be to adopt single rotor mechanism in the compressor of family expenses convertible frequency air-conditioner, promptly the rotor by motor drives an eccentric mechanism.The cost performance of compressor can improve in this single rotor mechanism, reduces manufacturing cost.In addition, along with the raising of line seal technology, invalid secondary refrigerant leakage has reduced to minimum.But this has brought a kind of difficulty but for the driving of motor in the compressor: in the process that the rotor of motor rotates a circle; Load is uncertain; Along with rotor-position changes and changes, and because the raising of aforementioned pipeline Sealing Technology, secondary refrigerant leakage reduces; More aggravate the fluctuation of this load, reduced the efficient of compressor.
Secondly; The compressor of domestic variable frequency air-conditioning extensively adopts the power source of permanent magnet synchronous motor as thermal power transfer; In order to improve the efficient of motor, along with the permanent-magnet synchronous development of material technology, the magnetic flux of the permanent magnet of permanent magnet synchronous motor becomes increasing.But, be used to drive this motor converter plant supply power voltage not therefore and proportional raising.If still use traditional single phase power supply power factor correcting method, because DC bus-bar voltage is fixed value, and can't change along with the variation of the working condition of motor, the result can cause the overall efficiency of actual frequency-changing control system to descend.
The utility model content
The utility model embodiment provides the drive unit of a kind of convertible frequency air-conditioner with compressor, is used to improve the runnability and the efficient of single-rotor compressor.
The utility model embodiment also provides the drive unit of a kind of convertible frequency air-conditioner with compressor; Comprise: speed regulator, q shaft current adjuster, d shaft current adjuster, the first torque control unit, the second torque control unit, the 3rd torque control unit, voltage coordinate inverse transformation block, electric current coordinate transformation unit, rotating speed estimation unit, weak magnetic control system unit and DC bus-bar voltage control unit, the said first torque control unit are used for obtaining being used to the compensated torque command value that suppresses to vibrate according to the estimated actual speed value of rotating speed estimation unit; After the torque value addition of the compensated torque command value of said first torque control unit output and the output of said speed regulator, the conversion through torque and q shaft current obtains the input value of q shaft current value as said q shaft current adjuster; The said second torque control unit is used for the be reduced q shaft voltage compensating instruction value of current fluctuation of q axle actual current value according to the output of said current conversion unit; Obtain the instruction of q shaft voltage after the output valve stack of the q shaft voltage compensating instruction value of said second torque control unit output and said q shaft current adjuster; Said the 3rd torque control unit is used for the be reduced d shaft voltage compensating instruction value of current fluctuation of d axle actual current value according to the output of said current conversion unit; Obtain the instruction of d shaft voltage after the output valve stack of the d shaft voltage compensating instruction value of said second torque control unit output and said d shaft current adjuster; Said voltage coordinate inverse transformation block is used for said q shaft voltage instruction and the instruction of said d shaft voltage are carried out exporting to motor to drive said single-rotor compressor after the coordinate transform; Said electric current coordinate transformation unit is used for the detected U of said motor, W phase current values are converted into the actual current value of d, q axle; Said rotating speed estimation unit is used for estimating said actual speed value according to the actual current value of said d, q axle; Said weak magnetic control system unit is used for d shaft current command value is carried out weak magnetic control system; Said DC bus-bar voltage control unit is used for the step-up ratio of regulating the power factor regulating circuit automatically according to through the d shaft current command value of weak magnetic control system output; And described step-up ratio is used for the power factor regulating circuit, promote the d-c bus voltage value of output.
Preferably, the first torque control unit comprises among the utility model embodiment: first extraction module is used for extracting the alternating component of actual speed value; The first integral adjustment module is used for that said alternating component is carried out integration and regulates; The phase place determination module, the phase place that is used to extract said actual speed value fluctuation decides the phase place of motor torque; First output module is used to export the compensated torque command value that suppresses vibration.
Preferably, the second torque control unit comprises among the utility model embodiment: second extraction module is used for extracting the alternating component of q axle actual current value; The second integral adjustment module is used for the alternating component of q axle actual current value is carried out the integration adjusting so that said alternating component is zero; Second output module is used to export the q shaft voltage compensating instruction value that is used to reduce current fluctuation; Said the 3rd torque control unit comprises: the 3rd extraction module is used for extracting the alternating component of d axle actual current value; The third integral adjustment module is used for the alternating component of d axle actual current value is carried out the integration adjusting so that said alternating component is zero; The 3rd output module is used to export the d shaft voltage compensating instruction value that is used to reduce current fluctuation.
Preferably; The DC bus-bar voltage control unit specifically is used among the utility model embodiment; Limits value to d shaft current command value carries out the integration adjusting with the d shaft current command value error of exporting through weak magnetic control system, obtains the step-up ratio instruction of circuit of power factor correction.
On the other hand, the utility model embodiment also provides a kind of air conditioner, comprises aforesaid drive unit.The utility model embodiment can be so that motor suppresses the vibration of motor when operating in the low speed territory; And during operating in, reduces by motor current fluctuation during speed; Thereby reduced the loss of system; Can also adjust direct voltage automatically when last the utility model embodiment motor operates in two-forty, optimal voltage is provided, further improve the overall efficiency of system to system.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously, the accompanying drawing in describing below only is some embodiment of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the drive unit of a kind of single-rotor compressor that Fig. 1 provides for the utility model embodiment;
The control flow chart of the DC bus-bar voltage control unit that Fig. 2 provides for the utility model embodiment;
The structural representation of a kind of first torque control unit that Fig. 3 provides for the utility model embodiment;
The structural representation of a kind of second torque control unit that Fig. 4 provides for the utility model embodiment;
The structural representation of a kind of the 3rd torque control unit that Fig. 5 provides for the utility model embodiment;
The structural representation of a kind of air conditioner that Fig. 6 provides for the utility model embodiment.
Embodiment
To combine the accompanying drawing among the utility model embodiment below, the technical scheme among the utility model embodiment is carried out clear, intactly description, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Be illustrated in figure 1 as the structural representation of the drive unit of a kind of single-rotor compressor that the utility model embodiment provides, this drive unit comprises: speed regulator 510, q shaft current adjuster 520, d shaft current adjuster 530, the first torque control unit 540, the second torque control unit 550, the 3rd torque control unit 560, voltage coordinate inverse transformation block 570, electric current coordinate transformation unit 580, rotating speed estimation unit 590, weak magnetic control system unit 600 and DC bus-bar voltage control unit 610.It is consistent with the rotary speed instruction value that speed regulator 510 is used to control actual speed, and it is input as the rotary speed instruction value
The actual speed value ω that is exported with rotating speed estimation unit 590
1, it is output as
The first torque control unit 540 is used for the actual speed value ω estimated according to rotating speed estimation unit 590
1Obtain being used to the compensated torque command value Δ τ that suppresses to vibrate
*, therefore, the first torque control unit 540 be input as the actual speed value ω that rotating speed estimation unit 590 is exported
1, and be output as compensated torque command value Δ τ
*In the present embodiment, the output of speed regulator 510
Output Δ τ with the first torque control unit 540
*Obtain τ after the stack
*, the conversion (being the maximum output matrix optimization of unitary current) through torque and q shaft current obtains q shaft current command value again
Remake a input, realized when motor operates in the low speed territory, reaching the purpose that suppresses vibration with this for q shaft current adjuster 520.
The conversion relation of torque in the present embodiment and q shaft current is following:
Wherein: P: the motor logarithm;
generating constant set point;
d axle/q axle inductance set point;
d shaft current command value.
Q shaft current adjuster 520 is used to control q axle actual current and the instruction current value is consistent, and one of which is input as the scaled value that superposition that speed regulator 510 and the first torque control unit 540 export and the conversion through torque and q shaft current obtain
Another is input as the q axle actual current value I of electric current coordinate transformation unit 580 outputs
Q_fb
The second torque control unit 550 is used for the q axle actual current value I according to 580 outputs of electric current coordinate transformation unit
Q_fbThe q shaft voltage compensating instruction value of current fluctuation is reduced
Therefore, the q axle actual current value I that is input as 580 outputs of electric current coordinate transformation unit of the second torque control unit 550
Q_fb, and be output as q shaft voltage compensating instruction value
In the present embodiment, obtain q shaft voltage instruction
after the output of the output of q shaft current adjuster 520 and the second torque control unit 550
addition and export to voltage coordinate inverse transformation block 570.
D shaft current adjuster 530 is used to control d axle actual current and the instruction current value is consistent, the individual d shaft current command value that is input as of one of which
Another is input as the d axle actual current value I of electric current coordinate transformation unit 580 outputs
D_fb
The 3rd torque control unit 560 is used for the d axle actual current value I according to 580 outputs of electric current coordinate transformation unit
D_fbThe d shaft voltage compensating instruction value of current fluctuation is reduced
Therefore, the d axle actual current value I that is input as 580 outputs of electric current coordinate transformation unit of the 3rd torque control unit 560
D_fb, and be output as d shaft voltage compensating instruction value
In the present embodiment, obtain d shaft voltage instruction
and export to voltage coordinate inverse transformation block 570 after the output of the output of d shaft current adjuster 530 and the 3rd torque control unit 560
stack.Voltage coordinate inverse transform unit 570 is used for q-axis voltage command
and the d-axis voltage command
coordinate inverse transform output to the motor to drive a single-rotor compressor.
An embodiment as the utility model; Voltage coordinate inverse transformation block 570 be with (d, q) rotating coordinate system is transformed to (u, v; W) thus three phase coordinate systems obtain U, V, the instruction of W three-phase output voltage, then motor is exported in this output voltage instruction.
Electric current coordinate transformation unit 580 is used for the detection according to motor current is obtained U, W phase current values I
uAnd I
w, coordinate transform is the actual current value I of d, q axle then
D_fbAnd I
Q_fb
Rotating speed estimation unit 590 is used for the actual current value I according to d, q axle
D_fbAnd I
Q_fbEstimate actual speed value ω
1
Weak magnetic control system unit 600 is used for d shaft current command value is carried out weak magnetic control system, and weak magnetic control is made as prior art, repeats no more at this.
DC bus-bar voltage control unit 610 is used for the step-up ratio of regulating the power factor regulating circuit automatically according to through the d shaft current command value
of weak magnetic control system output; And described step-up ratio is used for the power factor regulating circuit, promote the d-c bus voltage value of motor output.
As an embodiment of the utility model, be illustrated in figure 2 as the control flow chart of DC bus-bar voltage control unit, DC bus-bar voltage control unit 610 specifically is used for, to the limits value of d shaft current command value
With d shaft current command value through weak magnetic control system output
Error is carried out the integration adjusting, obtains the step-up ratio instruction Δ a of circuit of power factor correction
L
The utility model embodiment can be so that motor suppresses the vibration of motor when operating in the low speed territory, and motor reduces current fluctuation during speed in operating in, thereby has reduced the loss of system.
Be illustrated in figure 3 as the structural representation of a kind of first torque control unit that the utility model embodiment provides, this first torque control unit 540 comprises: first extraction module 541, first integral adjustment module 542, phase place determination module 543 and first output module 544.
First integral adjustment module 542 is used for that said alternating component is carried out integration and regulates.It is that to make the fluctuation composition of velocity of rotation be zero that alternating component in the actual speed value is carried out purpose that integration regulates.
The phase place that phase place determination module 543 is used to extract the fluctuation of actual speed value decides the phase place of motor torque.
Be illustrated in figure 4 as the structural representation of a kind of second torque control unit that the utility model embodiment provides, this second torque control unit 550 comprises: second extraction module 551, second integral adjustment module 552 and second output module 553, wherein:
Second integral adjustment module 552 is used for the alternating component of q axle actual current value is carried out the integration adjusting so that said alternating component is zero.
Be illustrated in figure 5 as the structural representation of a kind of the 3rd torque control unit that the utility model embodiment provides, the 3rd torque control unit 560 comprises: the 3rd extraction module 561, third integral adjustment module 562 and the 3rd output module 563, wherein:
The 3rd extraction module 561 is used for extracting the alternating component of d axle actual current value.
Third integral adjustment module 562 is used for the alternating component of d axle actual current value is carried out the integration adjusting so that said alternating component is zero.
The 3rd output module 563 is used to export the d shaft voltage compensating instruction value that is used to reduce current fluctuation.
The structural representation of a kind of air conditioner that provides for the utility model embodiment like Fig. 6, this air conditioner 110 comprises aforesaid drive unit 111, other structure can repeat no more at this referring to existing air conditioner structure.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description; Can instruct relevant hardware to accomplish through computer program; Described program can be stored in the computer read/write memory medium; This program can comprise like above-mentioned each the flow process of embodiment when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
Above-described specific embodiment; Purpose, technical scheme and beneficial effect to the utility model have carried out further explain, it should be understood that the above is merely the specific embodiment of the utility model; And be not used in the protection range that limits the utility model; All within the spirit and principle of the utility model, any modification of being made, be equal to replacement, improvement etc., all should be included within the protection range of the utility model.
Claims (5)
1. a convertible frequency air-conditioner is with the drive unit of compressor; It is characterized in that; Comprise: speed regulator, q shaft current adjuster, d shaft current adjuster, the first torque control unit, the second torque control unit, the 3rd torque control unit, voltage coordinate inverse transformation block, electric current coordinate transformation unit, rotating speed estimation unit, weak magnetic control system unit and DC bus-bar voltage control unit
The said first torque control unit is used for obtaining being used to the compensated torque command value that suppresses to vibrate according to the estimated actual speed value of rotating speed estimation unit;
After the torque value addition of the compensated torque command value of said first torque control unit output and the output of said speed regulator, the conversion through torque and q shaft current obtains the input value of q shaft current value as said q shaft current adjuster;
The said second torque control unit is used for the be reduced q shaft voltage compensating instruction value of current fluctuation of q axle actual current value according to the output of said current conversion unit;
Obtain the instruction of q shaft voltage after the output valve stack of the q shaft voltage compensating instruction value of said second torque control unit output and said q shaft current adjuster;
Said the 3rd torque control unit is used for the be reduced d shaft voltage compensating instruction value of current fluctuation of d axle actual current value according to the output of said current conversion unit;
Obtain the instruction of d shaft voltage after the output valve stack of the d shaft voltage compensating instruction value of said second torque control unit output and said d shaft current adjuster;
Said voltage coordinate inverse transformation block is used for said q shaft voltage instruction and the instruction of said d shaft voltage are carried out exporting to motor to drive said single-rotor compressor after the coordinate transform;
Said electric current coordinate transformation unit is used for the detected U of said motor, W phase current values are converted into the actual current value of d, q axle;
Said rotating speed estimation unit is used for estimating said actual speed value according to the actual current value of said d, q axle;
Said weak magnetic control system unit is used for d shaft current command value is carried out weak magnetic control system;
Said DC bus-bar voltage control unit is used for the step-up ratio of regulating the power factor regulating circuit automatically according to through the d shaft current command value of weak magnetic control system output; And described step-up ratio is used for the power factor regulating circuit, promote the d-c bus voltage value of output.
2. convertible frequency air-conditioner as claimed in claim 1 is characterized in that with the drive unit of compressor the said first torque control unit comprises:
First extraction module is used for extracting the alternating component of actual speed value;
The first integral adjustment module is used for that said alternating component is carried out integration and regulates;
The phase place determination module, the phase place that is used to extract said actual speed value fluctuation decides the phase place of motor torque;
First output module is used to export the compensated torque command value that suppresses vibration.
3. convertible frequency air-conditioner as claimed in claim 1 is characterized in that with the drive unit of compressor,
The said second torque control unit comprises:
Second extraction module is used for extracting the alternating component of q axle actual current value;
The second integral adjustment module is used for the alternating component of q axle actual current value is carried out the integration adjusting so that said alternating component is zero;
Second output module is used to export the q shaft voltage compensating instruction value that is used to reduce current fluctuation;
Said the 3rd torque control unit comprises:
The 3rd extraction module is used for extracting the alternating component of d axle actual current value;
The third integral adjustment module is used for the alternating component of d axle actual current value is carried out the integration adjusting so that said alternating component is zero;
The 3rd output module is used to export the d shaft voltage compensating instruction value that is used to reduce current fluctuation.
4. convertible frequency air-conditioner as claimed in claim 1 is characterized in that with the drive unit of compressor,
Said DC bus-bar voltage control unit specifically is used for, and the limits value and the d shaft current command value error of exporting through weak magnetic control system of d shaft current command value is carried out integration regulate, and obtains the step-up ratio instruction of circuit of power factor correction.
5. an air conditioner is characterized in that, comprises arbitrary described drive unit like claim 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201943822U CN202535303U (en) | 2012-04-28 | 2012-04-28 | Compressor driving device used for variable-frequency air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201943822U CN202535303U (en) | 2012-04-28 | 2012-04-28 | Compressor driving device used for variable-frequency air conditioner |
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| CN202535303U true CN202535303U (en) | 2012-11-14 |
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| CN2012201943822U Expired - Fee Related CN202535303U (en) | 2012-04-28 | 2012-04-28 | Compressor driving device used for variable-frequency air conditioner |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103378788A (en) * | 2012-04-28 | 2013-10-30 | 瑞萨电子(中国)有限公司 | Method and device for driving compressor for variable-frequency air conditioner |
| CN103532462A (en) * | 2013-09-17 | 2014-01-22 | 四川长虹电器股份有限公司 | Low-frequency torque compensation transition control method for permanent magnet synchronous motor |
| CN103296958B (en) * | 2013-05-22 | 2016-01-13 | 四川长虹电器股份有限公司 | A kind of torque automatic compensating method and torque self compensating system |
| WO2016050045A1 (en) * | 2014-09-30 | 2016-04-07 | 海信科龙电器股份有限公司 | Variable-frequency air conditioner control method |
| CN106194682A (en) * | 2015-05-29 | 2016-12-07 | 曼卡车和巴士股份公司 | For regulating method and the regulating loop in the electric drive portion of compressed air compressor |
| CN107623474A (en) * | 2017-10-24 | 2018-01-23 | 奥克斯空调股份有限公司 | A kind of power conversion control method and device |
| CN109309461A (en) * | 2017-07-28 | 2019-02-05 | 上海三菱电梯有限公司 | Elevator starts control device |
| CN109305612A (en) * | 2017-07-28 | 2019-02-05 | 上海三菱电梯有限公司 | Elevator starts control device |
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2012
- 2012-04-28 CN CN2012201943822U patent/CN202535303U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103378788A (en) * | 2012-04-28 | 2013-10-30 | 瑞萨电子(中国)有限公司 | Method and device for driving compressor for variable-frequency air conditioner |
| CN103378788B (en) * | 2012-04-28 | 2015-11-25 | 瑞萨电子(中国)有限公司 | The driving method of convertible frequency air-conditioner compressor and device |
| CN103296958B (en) * | 2013-05-22 | 2016-01-13 | 四川长虹电器股份有限公司 | A kind of torque automatic compensating method and torque self compensating system |
| CN103532462A (en) * | 2013-09-17 | 2014-01-22 | 四川长虹电器股份有限公司 | Low-frequency torque compensation transition control method for permanent magnet synchronous motor |
| CN103532462B (en) * | 2013-09-17 | 2016-04-13 | 四川长虹电器股份有限公司 | Permagnetic synchronous motor low-frequency torque compensation transition control method |
| WO2016050045A1 (en) * | 2014-09-30 | 2016-04-07 | 海信科龙电器股份有限公司 | Variable-frequency air conditioner control method |
| CN106194682A (en) * | 2015-05-29 | 2016-12-07 | 曼卡车和巴士股份公司 | For regulating method and the regulating loop in the electric drive portion of compressed air compressor |
| CN106194682B (en) * | 2015-05-29 | 2020-05-15 | 曼卡车和巴士股份公司 | Method for controlling an electric drive of a compressed air compressor and control circuit |
| CN109309461A (en) * | 2017-07-28 | 2019-02-05 | 上海三菱电梯有限公司 | Elevator starts control device |
| CN109305612A (en) * | 2017-07-28 | 2019-02-05 | 上海三菱电梯有限公司 | Elevator starts control device |
| CN109309461B (en) * | 2017-07-28 | 2020-09-18 | 上海三菱电梯有限公司 | Elevator starting control device |
| CN109305612B (en) * | 2017-07-28 | 2020-09-18 | 上海三菱电梯有限公司 | Elevator starting control device |
| CN107623474A (en) * | 2017-10-24 | 2018-01-23 | 奥克斯空调股份有限公司 | A kind of power conversion control method and device |
| CN107623474B (en) * | 2017-10-24 | 2019-01-01 | 奥克斯空调股份有限公司 | A kind of power conversion control method and device |
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Granted publication date: 20121114 Termination date: 20190428 |
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