CN108111086A - A kind of method for the real-time for improving switch table schema Direct Torque Control - Google Patents

A kind of method for the real-time for improving switch table schema Direct Torque Control Download PDF

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Publication number
CN108111086A
CN108111086A CN201711484086.XA CN201711484086A CN108111086A CN 108111086 A CN108111086 A CN 108111086A CN 201711484086 A CN201711484086 A CN 201711484086A CN 108111086 A CN108111086 A CN 108111086A
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sector
stator magnetic
magnetic linkage
vector
linkage vector
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CN108111086B (en
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唐校
刘畅
张志�
李秀平
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Dongguan University of Technology
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Dongguan University of Technology
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/30—Direct torque control [DTC] or field acceleration method [FAM]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

The invention belongs to switch table schema Study on direct torque control technology field, disclose a kind of method for the real-time for improving switch table schema Direct Torque Control, stator magnetic linkage vector component is converted into respective components in 60 ° of coordinate systems, the sector number that stator magnetic linkage vector is located in voltage vector region division is first judged according to the numerical value of two components；In each voltage vector sector there are two be directed to flux linkage vector small sector, further according to flux linkage vector coordinate components value through logic compare and shift operation, small sector number is judged, the sector as residing for small sector number determines stator magnetic linkage.The present invention judges sector residing for stator magnetic linkage in 60 ° of coordinate systems, only needs simple logic judgment and shift operation, and shift operation is primarily directed to the computing for multiplying 2 and multiply 0.5 during algorithm is realized.

Description

A kind of method for the real-time for improving switch table schema Direct Torque Control
Technical field
It is straight the invention belongs to switch table schema Study on direct torque control technology field more particularly to a kind of raising switch table schema The method for connecing the real-time of direct torque.
Background technology
It is 6 sectors that table schema Direct Torque Control, which is switched, generally by stator magnetic linkage interval division, stator magnetic linkage vector institute Place sector judges it is the important step for realizing Direct Torque Control.But it is quiet that traditional stator magnetic linkage vector sector, which judges, It is carried out in orthogonal coordinate system only, according to coordinate components ψ of the stator magnetic linkage being calculated in orthogonal coordinate systemαAnd ψβ, obtain The tangent value of magnetic linkage position angleIn conjunction with ψαAnd ψβSymbol, determined by comparing residing for stator magnetic linkage vector Sector.Traditional stator flux linkage vector sector judges that algorithm is related to more trigonometric function operation, division arithmetic etc., for processor Operation is time-consuming more, therefore is unfavorable for the real-time of entire algorithm.
In conclusion problem existing in the prior art is：Traditional switch table schema Direct Torque Control is judged due to sector Trigonometric function operation and division arithmetic cannot effectively be avoided, implementation procedure takes more, is unfavorable for the real-time of entire algorithm.
The content of the invention
In view of the problems of the existing technology, the present invention provides a kind of realities for improving switch table schema Direct Torque Control The method of when property.
The present invention is achieved in that a kind of method for the real-time for improving switch table schema Direct Torque Control, described It is right in 60 ° of coordinate systems that stator magnetic linkage vector component is converted by the method for the real-time of raising switch table schema Direct Torque Control Component is answered, the sector number that stator magnetic linkage vector is located in voltage vector region division is first judged according to the numerical value of two components； There are two the small sector for flux linkage vector region, (as shown in Figure 3 and Figure 4, voltage vector is fanned in each voltage vector sector 1. area 1 can be divided into two small sectors of stator magnetic linkage " and 2. ', the similar division in other sectors), further according to the seat of flux linkage vector Mark component value is compared through logic and shift operation, and small sector number residing for stator magnetic linkage vector is judged, true by small sector number Determine sector residing for stator magnetic linkage vector (1. ' and 1. " belong to stator magnetic linkage sector 1., other regions are similar).
Further, the voltage vector spatial sector division includes：
(1) ψ is worked asg+ψhWhen >=0, stator magnetic linkage vector is located at one in voltage vector spatial sector 1 or sector 2 or sector 6 A sector；
(2) ψ is worked asg+ψh<When 0, stator magnetic linkage vector is located at one in voltage vector spatial sector 3 or sector 4 or sector 5 Sector.
Further, described (1) specifically includes：
If 1) ψg<0, then stator magnetic linkage vector be located at voltage vector spatial sector 2；
If 2) ψh<0, then stator magnetic linkage vector be located at voltage vector spatial sector 6；
3) otherwise, stator magnetic linkage vector is located at voltage vector spatial sector 1.
Further, it is described 1) to include：
If a)-ψg≥0.5ψh, 3. stator magnetic linkage vector is located at sector；
B) otherwise, 2. stator magnetic linkage vector is located at sector；
It is described 2) to include：
If a) ψg≥-2ψh, 1. stator magnetic linkage vector is located at sector；
B) otherwise, 6. stator magnetic linkage vector is located at sector；
It is described 3) to include：
If a) ψg≥ψh, 1. stator magnetic linkage vector is located at sector；
B) otherwise, 2. stator magnetic linkage vector is located at sector.
Further, described (2) specifically include：
If 1) ψh>=0, then stator magnetic linkage vector be located at voltage vector spatial sector 3；
If 2) ψg>=0, then stator magnetic linkage vector be located at voltage vector spatial sector 5；
3) otherwise, stator magnetic linkage vector is located at voltage vector spatial sector 4.
Further, it is described 1) to include：
If a)-ψg≥2ψh, 4. stator magnetic linkage vector is located at sector；
B) otherwise, 3. stator magnetic linkage vector is located at sector；
It is described 2) to include：
If a) ψg≥-0.5ψh, 6. stator magnetic linkage vector is located at sector；
B) otherwise, 5. stator magnetic linkage vector is located at sector；
It is described 3) to include：
If a) ψg<ψh, 4. stator magnetic linkage vector is located at sector；
B) otherwise, 5. stator magnetic linkage vector is located at sector.
The present invention judges sector residing for stator magnetic linkage vector in 60 ° of coordinate systems entire algorithm performs only need letter Single logic judgment and shift operation can be completed, and wherein shift operation is primarily directed to multiply 2 Hes during algorithm is realized Multiply 0.5 computing.Judge algorithm compared to the sector in conventional orthogonal coordinate system, avoid division arithmetic, for the processing of execution For device, code can be substantially reduced and perform the time, the dependence of hardware resource can also decline.For a user, there are two The advantage of a aspect：(1) more cheap processor can be selected to complete algorithm；(2) processor can be reserved at the more time Other items are managed, solve more complicated algorithm.Under the Integrated Development Environment CCS of TI companies time statistics work is performed using code The execution time of code needed for the judgement of stator magnetic linkage vector sector, following table are completed in tool comparison orthogonal coordinate system and 60 ° of coordinate systems It is the correction data (unit of the two：Clock cycle)：
Orthogonal coordinate system 197 194 382 370
60 ° of coordinate systems 23 23 29 31
Description of the drawings
Fig. 1 is the method flow of the real-time provided in an embodiment of the present invention for improving switch table schema Direct Torque Control Figure.
Fig. 2 is that stator magnetic linkage vector space sector divides schematic diagram in orthogonal coordinate system.
Fig. 3 is voltage vector spatial sector division schematic diagram provided in an embodiment of the present invention.
Fig. 4 is that stator magnetic linkage vector space sector divides schematic diagram in 60 ° of coordinate systems provided in an embodiment of the present invention.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to Limit the present invention.
The application principle of the present invention is explained in detail below in conjunction with the accompanying drawings.
As shown in Figure 1, the method for the real-time provided in an embodiment of the present invention for improving switch table schema Direct Torque Control Comprise the following steps：
S101：The stator magnetic linkage vector component of acquisition is converted into respective components in 60 ° of coordinate systems, according to two components Numerical value first judges the sector number that stator magnetic linkage vector is located in the division of voltage vector space；
S102：There are two the small sector for being directed to flux linkage vector in each voltage vector spatial sector, further according to magnetic linkage The coordinate components value of vector is compared through logic and shift operation, small sector number residing for stator magnetic linkage vector is judged, by small Sector number just can determine sector residing for stator magnetic linkage vector.
The application principle of the present invention is further described below in conjunction with the accompanying drawings.
(1) 60 ° of coordinate system feature：
1. the h axis components of each point are equal in same horizontal line；
2. the g axis components of each point are equal on same 60 ° of lines；
3. on same 120 ° of lines the g axis of each point with it is h axis components and equal.
Stator magnetic linkage vector sector judges in (2) 60 ° of coordinate systems
The division of stator magnetic linkage vector space sector is as shown in Figure 4 in 60 ° of coordinate systems：
Small subregion is 1. in Fig. 4 ' and 1. " belonging to sector 1., other sectors are similar.The division of voltage vector spatial sector is as schemed Shown in 3：
1) ψ is worked asg+ψhWhen >=0, stator magnetic linkage vector is located at one in voltage vector spatial sector 1 or sector 2 or sector 6 Sector.
If i) ψg<0, then stator magnetic linkage vector be located at voltage vector spatial sector 2
If a)-ψg≥0.5ψh, 3. stator magnetic linkage vector is located at sector '；
B) otherwise, 2. stator magnetic linkage vector is located at sector ".
Ii) if ψh<0, then stator magnetic linkage vector be located at voltage vector spatial sector 6
If a) ψg≥-2ψh, 1. stator magnetic linkage vector is located at sector '；
B) otherwise, 6. stator magnetic linkage vector is located at sector ".
Iii) otherwise, stator magnetic linkage vector is located at voltage vector spatial sector 1
If a) ψg≥ψh, 1. stator magnetic linkage vector is located at sector "；
B) otherwise, 2. stator magnetic linkage vector is located at sector '.
2) ψ is worked asg+ψh<When 0, stator magnetic linkage vector is located at one in voltage vector spatial sector 3 or sector 4 or sector 5 Sector.
If i) ψh>=0, then stator magnetic linkage vector be located at voltage vector spatial sector 3
If a)-ψg≥2ψh, 4. stator magnetic linkage vector is located at sector '；
B) otherwise, 3. stator magnetic linkage vector is located at sector ".
Ii) if ψg>=0, then stator magnetic linkage vector be located at voltage vector spatial sector 5
If a) ψg≥-0.5ψh, 6. stator magnetic linkage vector is located at sector '；
B) otherwise, 5. stator magnetic linkage vector is located at sector ".
Iii) otherwise, stator magnetic linkage vector is located at voltage vector spatial sector 4
If a) ψg<ψh, 4. stator magnetic linkage vector is located at sector "；
B) otherwise, 5. stator magnetic linkage vector is located at sector '.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.

Claims (6)

  1. A kind of 1. method for the real-time for improving switch table schema Direct Torque Control, which is characterized in that the raising switch list Stator magnetic linkage vector component is converted into respective components in 60 ° of coordinate systems, root by the method for the real-time of pattern Direct Torque Control First judge the sector number that stator magnetic linkage vector is located in voltage vector region division according to the numerical value of two components；It is sweared in each voltage It measures in sector all there are two the small sector for being directed to flux linkage vector, compares and move through logic further according to the coordinate components value of flux linkage vector Bit arithmetic judges small sector number, the sector as residing for small sector number determines stator magnetic linkage vector.
  2. 2. the method for the real-time as described in claim 1 for improving switch table schema Direct Torque Control, which is characterized in that institute Stating the division of voltage vector sector includes：
    (1) ψ is worked asg+ψhWhen >=0, stator magnetic linkage vector is located at a fan in voltage vector spatial sector 1 or sector 2 or sector 6 Area；
    (2) ψ is worked asg+ψh<When 0, stator magnetic linkage vector is located at a fan in voltage vector spatial sector 3 or sector 4 or sector 5 Area；
    ψgAnd ψhCoordinate components of the stator magnetic linkage vector in 60 ° of coordinate systems are represented respectively.
  3. 3. the method for the real-time as claimed in claim 2 for improving switch table schema Direct Torque Control, which is characterized in that institute (1) is stated to specifically include：
    If 1) ψg<0, then stator magnetic linkage vector be located at voltage vector spatial sector 2；
    If 2) ψh<0, then stator magnetic linkage vector be located at voltage vector spatial sector 6；
    3) otherwise, stator magnetic linkage vector is located at voltage vector spatial sector 1.
  4. 4. the method for the real-time as claimed in claim 3 for improving switch table schema Direct Torque Control, which is characterized in that institute 1) stating includes：
    If a)-ψg≥0.5ψh, 3. stator magnetic linkage vector is located at sector；
    B) otherwise, 2. stator magnetic linkage vector is located at sector；
    It is described 2) to include：
    If a) ψg≥-2ψh, 1. stator magnetic linkage vector is located at sector；
    B) otherwise, 6. stator magnetic linkage vector is located at sector；
    It is described 3) to include：
    If a) ψg≥ψh, 1. stator magnetic linkage vector is located at sector；
    B) otherwise, 2. stator magnetic linkage vector is located at sector.
  5. 5. the method for the real-time as claimed in claim 2 for improving switch table schema Direct Torque Control, which is characterized in that institute (2) are stated to specifically include：
    If 1) ψh>=0, then stator magnetic linkage vector be located at voltage vector spatial sector 3；
    If 2) ψg>=0, then stator magnetic linkage vector be located at voltage vector spatial sector 5；
    3) otherwise, stator magnetic linkage vector is located at voltage vector spatial sector 4.
  6. 6. the method for the real-time as claimed in claim 5 for improving switch table schema Direct Torque Control, which is characterized in that institute 1) stating includes：
    If a)-ψg≥2ψh, 4. stator magnetic linkage vector is located at sector；
    B) otherwise, 3. stator magnetic linkage vector is located at sector；
    It is described 2) to include：
    If a) ψg≥-0.5ψh, 6. stator magnetic linkage vector is located at sector；
    B) otherwise, 5. stator magnetic linkage vector is located at sector；
    It is described 3) to include：
    If a) ψg<ψh, 4. stator magnetic linkage vector is located at sector；
    B) otherwise, 5. stator magnetic linkage vector is located at sector.
CN201711484086.XA 2017-12-29 2017-12-29 Method for improving instantaneity of direct torque control in switch meter mode Active CN108111086B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102647101A (en) * 2011-12-26 2012-08-22 东方日立(成都)电控设备有限公司 Three-level space vector modulation method under multiple coordinate systems
CN104022671A (en) * 2014-04-09 2014-09-03 江苏大学 60degree coordinate system based virtual vector modulation algorithm of tri-level inverter
CN104506064A (en) * 2014-12-03 2015-04-08 许继电气股份有限公司 Space vector modulation method of three-level current converter
CN104836466A (en) * 2015-05-28 2015-08-12 哈尔滨理工大学 60-degree coordinate system-based three-phase VIENNA rectifier and control method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102647101A (en) * 2011-12-26 2012-08-22 东方日立(成都)电控设备有限公司 Three-level space vector modulation method under multiple coordinate systems
CN104022671A (en) * 2014-04-09 2014-09-03 江苏大学 60degree coordinate system based virtual vector modulation algorithm of tri-level inverter
CN104506064A (en) * 2014-12-03 2015-04-08 许继电气股份有限公司 Space vector modulation method of three-level current converter
CN104836466A (en) * 2015-05-28 2015-08-12 哈尔滨理工大学 60-degree coordinate system-based three-phase VIENNA rectifier and control method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
唐校: "基于60°坐标系SVPWM的永磁同步电机高效率直接转矩控制研究", 《中国博士学位论文全文数据库 工程科技Ⅱ辑》 *

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