CN1610242A - Control method of parameter containing basic variable for asynchronous machine - Google Patents
Control method of parameter containing basic variable for asynchronous machine Download PDFInfo
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- CN1610242A CN1610242A CN 200310110428 CN200310110428A CN1610242A CN 1610242 A CN1610242 A CN 1610242A CN 200310110428 CN200310110428 CN 200310110428 CN 200310110428 A CN200310110428 A CN 200310110428A CN 1610242 A CN1610242 A CN 1610242A
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Abstract
The present invention is the control method of parameter containing base variable for asynchronous motor. The base variable itself or the load angle tangent is adopted in constituting equivalent closed rotation speed control, so as to meet the requirement of soft start speed increment and/or soft stop speed decrement under different loads.
Description
The present invention relates to the parameter control method that contains based variable of a kind of motor control method, particularly a kind of asynchronous machine.
In industry and resident living, using at present the asynchronous machine that under power frequency supply, moves in a large number; needs according to electrical network or load; soft start raising speed and soft stop reduction of speed are carried out in requirement; the latter is as being used to eliminate " water hammer effect " of pump machine; should adopt speed closed loop control according to the essential requirement of speed control; for fear of the installing speed probe, this just needs a kind of new equivalent speed closed loop control method of exploitation again.
The parameter control method that contains based variable that the purpose of this invention is to provide a kind of asynchronous machine.
Comprise be serially connected with between power frequency supply and the controlled motor I M contain Regulation Control inlet 10 three opposite and connect thyristor unit 01 and contain the parameter of based variable and the condition of the observing unit 02 that stator current is shared under, it is as follows that technical scheme of the present invention is pressed the level division.
Set point FZ
CWith the parameter estimator value FZ that contains based variable from observing unit 02
FDifference E, through behind regulon 03 and the amplitude limit unit 04 the stator current value of providing I
CThe stator current value of providing I
CWith stator current measured value I from observing unit 02
FDifference through being sent to Regulation Control inlet 10 behind the regulon 05 again.
Set point FZ
CWith parameter estimator value FZ
FPhysical meaning identical, or be all basic variable self, or be all the power angle tangent value.
Set point FZ
COr from the middle tap of potentiometer 13 and by artificial setting or from the output of function generating unit 20 and automatic setting.
Below in conjunction with accompanying drawing the present invention is further elaborated.
Fig. 1 is a circuit diagram.
Fig. 2 is Z-W
2T
2And TG δ-W
2T
2Curve chart.
Fig. 3 is set point FZ
CPie graph.
The circuit of Fig. 1 constitutes as previously described, and regulon 03 is the proportional integral regulon with regulon 05.
Power frequency only is that in the frequency control refers in particular to frequency, so the patent No. is that the observation formula of the basic variable Z that provided in 01106851.5 " observation procedure that contains the parameter of based variable in the variable frequency speed modulation of asynchronous motor " and power angle tangent value TG δ is suitable equally under power frequency, that is
Z=WG/ (IK * L1 * W1) (formula 1)
TG δ=SQR ((1-Z)/(Z-B0)) (formula 2)
And by Electrical Motor TG δ=W as can be known
2T
2(formula 3)
Can get Z=(1+B0 * TG δ again by (formula 2)
2)/(1+TG δ
2) (formula 4)
In above-listed formula: WG is the phase reactive power of motor, and IK is the square value of the phase stator current I1 of motor, and L1 is the phase inductance of the stator winding of motor, and W1 is the stator angular frequency, W
2Be slip angular frequency, T
2Be rotor time constant, B0 is a magnetic leakage factor, and SQR represents extraction of square root, can draw Z-W according to (formula 3) and (formula 4)
2T
2And TG δ-W
2T
2Curve.
In the static coordinate system of α and β axle, be that 02277645.1 " under the power frequency asynchronous machine observation contain the used coordinate conversion unit of basic variable parameter " can get according to the patent No.
IK＝I1α
2+I1β
2，I1＝SQR(IK)，VK＝V1α
2+V1β
2，V1＝SQR(VK)，
WG＝V1β×I1α-V1α×I1β， YG＝V1α×I1α+V1β×I1β，
COSθ＝YG/(V1×I1)，
Again in the synchronous rotation coordinate system of D and Q axle, be that 02139708.2 " the reactive power operation method that is used for basic variable observation in the asynchronous machine " can get according to the patent No.
IK＝I1D
2+I1Q
2，I1＝SQR(IK)，VK＝V1D
2+V1Q
2，V1＝SQR(VK)，
WG＝V1Q×I1D-V1D×I1Q， YG＝V1D×I1D+V1Q×I1Q，
COSθ＝YG/(V1×I1)，
In various in the above: V1 is the phase stator voltage of motor, and YG is the phase active power of motor, and COS θ is the power factor of motor, and α and β (D and Q) represent the component of curtage on α axle and β axle (at D axle and Q axle) respectively.
The parameter estimator value FZ that contains based variable by observing unit 02 output
F(equal Z (formula 1) or equal TG δ (formula 2)) and stator current measured value I
F(equaling I1).Z-W has been shown among Fig. 2
2T
2And TG δ-W
2T
2Curve, the A point is represented the motor point of zero velocity among Fig. 2, along with motor speed rising, then W
2T
2Reduce, Z increases, and TG δ reduces; When motor speed descends, W then
2T
2Increase, Z reduces, and TG δ increases; And all be the monotone variation curve, so Z and TG δ all can be used as the motor speed signal of equivalence, thereby the equivalent speed closed loop that constitutes is as shown in Figure 1 controlled.But work as FZ
FDuring for Z, if E＞0 among Fig. 1, then the output of regulon 03 should increase; And work as FZ
FDuring for TG δ, if E＞0 among Fig. 1, then the output of regulon 03 (many a negative function) should reduce.
In Fig. 3, set point FZ
CBy diverter switch SW or from the output of function generating unit 20 and automatic setting, or from the middle tap of potentiometer 13 and by artificial setting.The counting unit 15 that function generating unit 20 is used by variable-frequency clock generation unit 14, as the address, EEPROM 16 and D/A converter unit 17 serial connection mutually form, and these all are prior aries.
Many unit among Fig. 1 and Fig. 3 all can be realized by monolithic computer or data processor.
Excellent characteristics of the present invention are as follows:
(1) as a kind of new equivalent speed closed loop control method, to satisfy soft start raising speed and soft stop The essential demand of machine reduction of speed control.
(2) by changing the frequency of clock generation unit 14, can set soft start and soft stop the time Between.
(3) by changing the internal storage data of EEPROM 16, can adapt to the needs of various loads.
(4) because in the synchronous rotary coordinate system, first-harmonic shows as direct current signal, passes through digital filtering Process, be easy to the elimination harmonic components.
(5) have current limiting performance, to guarantee device security, this is by amplitude limit unit 04 and I among Fig. 1C-I
FThe closed-loop adjustment that consists of realizes.
Claims (3)
1, a kind of parameter control method that contains based variable of asynchronous machine, comprise three opposite and the parameter and the shared observing units 02 of stator current that connect thyristor unit 01 and contain based variable that contain Regulation Control inlet 10 that are serially connected with between power frequency supply and the controlled motor I M, it is characterized in that: set point FZ
CWith the parameter estimator value FZ that contains based variable from observing unit 02
FDifference E, through behind regulon 03 and the amplitude limit unit 04 the stator current value of providing I
CThe stator current value of providing I
CWith stator current measured value I from observing unit 02
FDifference through being sent to Regulation Control inlet 10 behind the regulon 05 again.
2, control method according to claim 1 is characterized in that: said set point FZ
CWith parameter estimator value FZ
FPhysical meaning identical, or be all basic variable self, or be all the power angle tangent value.
3, according to claim 1,2 described control methods, it is characterized in that: said set point FZ
COr from the middle tap of potentiometer 13 and by artificial setting or from the output of function generating unit 20 and automatic setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310110428 CN1610242A (en) | 2003-10-20 | 2003-10-20 | Control method of parameter containing basic variable for asynchronous machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310110428 CN1610242A (en) | 2003-10-20 | 2003-10-20 | Control method of parameter containing basic variable for asynchronous machine |
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| Publication Number | Publication Date |
|---|---|
| CN1610242A true CN1610242A (en) | 2005-04-27 |
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ID=34759106
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111082717A (en) * | 2020-02-06 | 2020-04-28 | 浙江大华技术股份有限公司 | Stepping motor control method and device |
-
2003
- 2003-10-20 CN CN 200310110428 patent/CN1610242A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111082717A (en) * | 2020-02-06 | 2020-04-28 | 浙江大华技术股份有限公司 | Stepping motor control method and device |
| CN111082717B (en) * | 2020-02-06 | 2022-05-03 | 浙江大华技术股份有限公司 | Stepping motor control method and device |
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