CN102437812A - Dynamic magnetic link control method used for carrying out frequency conversion and speed regulation on asynchronous motor - Google Patents
Dynamic magnetic link control method used for carrying out frequency conversion and speed regulation on asynchronous motor Download PDFInfo
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- CN102437812A CN102437812A CN2011104524939A CN201110452493A CN102437812A CN 102437812 A CN102437812 A CN 102437812A CN 2011104524939 A CN2011104524939 A CN 2011104524939A CN 201110452493 A CN201110452493 A CN 201110452493A CN 102437812 A CN102437812 A CN 102437812A
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Abstract
The invention relates to a dynamic magnetic link control method used for carrying out frequency conversion and speed regulation on an asynchronous motor. For different speed zones of the asynchronous motor, stator flux linkage given value and tolerance value in a hysteresis comparator are dynamically adjusted according to an algorithm, motion direction at a stator flux linkage vector end point is consistent with a voltage vector direction by selecting one of working voltage vectors of 0 degree, plus 60 degrees and minus 60 degrees by virtue of flux linkage trajectory tracking control and flux linkage adjustment control, and dynamic control performance of electromagnetic torque during frequency conversion and speed regulation of the asynchronous motor is improved.
Description
Technical field
The present invention relates to a kind of A/C transmission control method, relate in particular to the dynamic magnetic linkage control method of a kind of asynchronous motor.
Background technology
Variable-frequency control technique is a kind of novel electric power drive speed-adjusting technology of rising late 1980s; Technology such as current collection power electronics, control automatically, microelectronics, Electrical Motor are in the new and high technology of one; In each field of national economy extensive applicability is arranged with its excellent speed adjusting performance, significant power savings; Being known as both at home and abroad is to use the widest, the highest, the optimal electric drive scheme of effect in the world, is the developing direction of electric drive.Frequency control is to reach the electric machine speed regulation purpose through changing supply frequency and supply voltage, and frequency control provides important new tool for improving the business economic benefit.
At motor friction speed section, because the existence of motor stator winding resistance, the relation between motor stator magnetic linkage and the stator terminal voltage is rendered as different characteristic.In variable frequency regulating speed control, the controlling electromagnetic torque of asynchronous motor is reached by the control stator magnetic linkage, the dynamic response characteristic of controlling electromagnetic torque is directly connected to the frequency control performance.Therefore,, need to control, improve the speed adjusting performance of frequency converter with different relationships to deciding magnetic linkage at motor friction speed section.
Summary of the invention
The objective of the invention is to different speed of service section according to asynchronous motor; Dynamically adjust stator flux linkage set value and tolerance in the hysteresis comparator; Regulate control through magnetic linkage track tracking Control and magnetic linkage; Select 0 degree ,+one of 60 degree ,-60 degree operating voltage vectors, make the direction of motion of stator magnetic linkage vector end points consistent with the voltage vector direction, improve the dynamic control performance of the electromagnetic torque in the asynchronous motor frequency-changing speed-regulating.
The present invention realizes like this; To the friction speed section of asynchronous motor,, dynamically adjust stator flux linkage set value and tolerance in the hysteresis comparator according to formula 1 and formula 2; Regulate control through magnetic linkage track tracking Control and magnetic linkage; Select 0 degree ,+one of 60 degree ,-60 degree operating voltage vectors, make the direction of motion of stator magnetic linkage vector end points consistent with the voltage vector direction, improve the dynamic control performance of the electromagnetic torque in the asynchronous motor frequency-changing speed-regulating;
In the formula;
is motor stator benchmark magnetic linkage;
is the fiducial value of magnetic linkage adjusting tolerance, and
is the motor rated speed.
is given magnetic linkage;
regulates tolerance for magnetic linkage, and
,
,
,
are regulatory factor.
When the speed of service of motor less than rated speed 35% the time; By formula
confirms the stator flux linkage set value of hysteresis comparator in the magnetic linkage track tracking Control, and by formula
confirms the tolerance of hysteresis comparator in the magnetic linkage adjusting control;
When the speed of service of motor at 35% between 75% time of rated speed; By formula
confirms the stator flux linkage set value of hysteresis comparator in the magnetic linkage track tracking Control, and by formula
confirms the tolerance of hysteresis comparator in the magnetic linkage adjusting control;
When the speed of service of motor greater than rated speed 75% the time; By formula
confirms the stator flux linkage set value of hysteresis comparator in the magnetic linkage track tracking Control, and by formula
confirms the tolerance of hysteresis comparator in the magnetic linkage adjusting control.Reach the stator flux linkage set value dynamically adjusted in the hysteresis comparator and the purpose of tolerance.
Technique effect of the present invention is: in variable frequency regulating speed control, make the direction of motion of stator magnetic linkage vector end points consistent with the voltage vector direction, effectively improve the dynamic control performance of the electromagnetic torque in the asynchronous motor frequency-changing speed-regulating.
Description of drawings
Fig. 1 is the dynamic magnetic linkage control principle block diagram of asynchronous motor frequency-changing speed-regulating of the present invention.
Embodiment
As shown in Figure 1, according to stator voltage, stator current and the rotor speed of asynchronous motor, calculate stator magnetic linkage Ψ s and the projection Ψ on β a axle, β b axle, β c axle thereof by the stator magnetic linkage computing unit
β a, Ψ
β b, Ψ
β c, and calculate given magnetic linkage value Ψ and tolerance ε according to formula 1, formula 2.Produce magnetic linkage track vector S ψ by hysteresis comparator in the magnetic linkage track tracking Control
a, S Ψ
b, S Ψ
cWherein, work as Ψ
β aDuring more than or equal to+Ψ, S ψ
aEqual 0, work as Ψ
β aDuring smaller or equal to-Ψ, S ψ
aEqual 1, work as Ψ
β a-Ψ and+Ψ between the time, S ψ
aRemain unchanged in; Work as Ψ
β bDuring more than or equal to+Ψ, S Ψ
bEqual 0, work as Ψ
β bDuring smaller or equal to-Ψ, S Ψ
bEqual 1, work as Ψ
β b-Ψ and+Ψ between the time, S Ψ
bRemain unchanged in; Work as Ψ
β cDuring more than or equal to+Ψ, S Ψ
cEqual 0, work as Ψ
β cDuring smaller or equal to-Ψ, S Ψ
cEqual 1, work as Ψ
β c-Ψ and+Ψ between the time, S Ψ
cRemain unchanged in.Regulate hysteresis comparator generation magnetic linkage adjusting vector Ψ in the control by magnetic linkage
QWherein, as Ψ-Ψ s during greater than+ε, Ψ
QEqual 1, as Ψ-Ψ s during less than-ε, Ψ
QEqual-1, when Ψ-Ψ s-ε and+ε between the time, Ψ
QEqual 0.According to magnetic linkage track vector S ψ
a, S Ψ
b, S Ψ
cAnd magnetic linkage is regulated vector Ψ
QBy the voltage vector selector select 0 degree ,+one of 60 degree ,-60 degree operating voltage vectors, wherein, work as Ψ
QEqual at 0 o'clock, according to magnetic linkage track vector S ψ
a, S Ψ
b, S Ψ
cSelect the degree of 0 on corresponding magnetic linkage track section operating voltage vector, work as Ψ
QEqual at 1 o'clock, according to magnetic linkage track vector S ψ
a, S Ψ
b, S Ψ
cSelect the degree of-60 on corresponding magnetic linkage track section operating voltage vector, work as Ψ
QEqual at-1 o'clock, according to magnetic linkage track vector S ψ
a, S Ψ
b, S Ψ
cSelect the degree of 60 on corresponding magnetic linkage track section operating voltage vector; Thereby control inverter produces the correspondent voltage vector; Make the direction of motion of stator magnetic linkage vector end points consistent, improve the dynamic control performance of the electromagnetic torque in the asynchronous motor frequency-changing speed-regulating with the voltage vector direction.
As shown in Figure 1, the stator magnetic linkage computing unit calculates stator magnetic linkage Ψ s and the projection Ψ on β a axle, β b axle, β c axle thereof according to stator voltage, stator current and the rotor speed of asynchronous motor
β a, Ψ
β b, Ψ
β c, and calculate given magnetic linkage value Ψ and tolerance ε according to formula 1, formula 2, produce magnetic linkage track vector S ψ by hysteresis comparator in the magnetic linkage track tracking Control
a, S Ψ
b, S Ψ
c, regulate hysteresis comparator generation magnetic linkage adjusting vector Ψ in the control by magnetic linkage
Q, according to selecting magnetic linkage track vector S ψ
a, S Ψ
b, S Ψ
cAnd magnetic linkage is regulated vector Ψ
QBy the voltage vector selector select 0 degree ,+one of 60 degree ,-60 degree operating voltage vectors; Control inverter produces the correspondent voltage vector; Make the direction of motion of stator magnetic linkage vector end points consistent, improve the dynamic control performance of the electromagnetic torque in the asynchronous motor frequency-changing speed-regulating with the voltage vector direction.
Claims (1)
1. the dynamic magnetic linkage control method of an asynchronous motor frequency-changing speed-regulating; It is characterized in that friction speed section to asynchronous motor; According to formula 1 and formula 2; Dynamically adjust stator flux linkage set value and tolerance in the hysteresis comparator, regulate control through magnetic linkage track tracking Control and magnetic linkage, select 0 degree ,+one of 60 degree ,-60 degree operating voltage vectors; Make the direction of motion of stator magnetic linkage vector end points consistent, improve the dynamic control performance of the electromagnetic torque in the asynchronous motor frequency-changing speed-regulating with the voltage vector direction;
In the formula;
is motor stator benchmark magnetic linkage;
regulates the fiducial value of tolerance for magnetic linkage;
is the motor rated speed;
is given magnetic linkage;
regulates tolerance for magnetic linkage, and
,
,
,
are regulatory factor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110452493.9A CN102437812B (en) | 2011-12-30 | 2011-12-30 | Dynamic magnetic link control method used for carrying out frequency conversion and speed regulation on asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110452493.9A CN102437812B (en) | 2011-12-30 | 2011-12-30 | Dynamic magnetic link control method used for carrying out frequency conversion and speed regulation on asynchronous motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102437812A true CN102437812A (en) | 2012-05-02 |
| CN102437812B CN102437812B (en) | 2014-05-14 |
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|---|---|---|---|
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| CN (1) | CN102437812B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102983806A (en) * | 2012-11-29 | 2013-03-20 | 深圳市汇川技术股份有限公司 | Asynchronous machine stator flux estimation system based on current model and method |
| CN103457532A (en) * | 2013-09-11 | 2013-12-18 | 昆山新金福精密电子有限公司 | Speed sensor-less magnetic flux linkage vector control method based on fuzzy self-adaptation |
| CN103580577A (en) * | 2012-07-24 | 2014-02-12 | 西门子公司 | Method and apparatus for determining an electrical torque of an electrical machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1516416A1 (en) * | 2002-06-04 | 2005-03-23 | Wavecrest Laboratories, LLC | Rotary electric motor having a plurality of shifted stator poles and/or rotor poles |
| CN101056084A (en) * | 2007-03-07 | 2007-10-17 | 今创集团有限公司 | Direct torque brushless DC servo control system and its working method |
| CN101387688A (en) * | 2007-09-11 | 2009-03-18 | 通用汽车环球科技运作公司 | Method and apparatus for electric motor torque monitoring |
| CN101902192A (en) * | 2010-07-15 | 2010-12-01 | 福州大学 | Direct automatic control method of hybrid stepper motor |
-
2011
- 2011-12-30 CN CN201110452493.9A patent/CN102437812B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1516416A1 (en) * | 2002-06-04 | 2005-03-23 | Wavecrest Laboratories, LLC | Rotary electric motor having a plurality of shifted stator poles and/or rotor poles |
| CN101056084A (en) * | 2007-03-07 | 2007-10-17 | 今创集团有限公司 | Direct torque brushless DC servo control system and its working method |
| CN101387688A (en) * | 2007-09-11 | 2009-03-18 | 通用汽车环球科技运作公司 | Method and apparatus for electric motor torque monitoring |
| CN101902192A (en) * | 2010-07-15 | 2010-12-01 | 福州大学 | Direct automatic control method of hybrid stepper motor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103580577A (en) * | 2012-07-24 | 2014-02-12 | 西门子公司 | Method and apparatus for determining an electrical torque of an electrical machine |
| CN103580577B (en) * | 2012-07-24 | 2018-11-09 | 西门子公司 | Method and apparatus for the electromagnetic torque for measuring motor |
| CN102983806A (en) * | 2012-11-29 | 2013-03-20 | 深圳市汇川技术股份有限公司 | Asynchronous machine stator flux estimation system based on current model and method |
| CN103457532A (en) * | 2013-09-11 | 2013-12-18 | 昆山新金福精密电子有限公司 | Speed sensor-less magnetic flux linkage vector control method based on fuzzy self-adaptation |
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| Publication number | Publication date |
|---|---|
| CN102437812B (en) | 2014-05-14 |
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