CN110224650A - Field weakening control method, device and motor - Google Patents
Field weakening control method, device and motor Download PDFInfo
- Publication number
- CN110224650A CN110224650A CN201910605885.0A CN201910605885A CN110224650A CN 110224650 A CN110224650 A CN 110224650A CN 201910605885 A CN201910605885 A CN 201910605885A CN 110224650 A CN110224650 A CN 110224650A
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- control method
- offset
- output valve
- field weakening
- weak
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Classifications
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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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/0085—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation specially adapted for high speeds, e.g. above nominal speed
- H02P21/0089—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation specially adapted for high speeds, e.g. above nominal speed using field weakening
-
- 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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/22—Current control, e.g. using a current control loop
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The present invention relates to driving motor technical field, a kind of motor field weakening control method, device and motor are specifically provided.Field weakening control method, comprising: obtain the output valve of q shaft voltage and the setting value of q shaft voltage under weak magnetic state；The offset of weak magnetoelectricity stream is determined according to the output valve and the setting value；Weak magnetoelectricity stream is compensated according to the offset.Control method of the invention improves motor weak magnetic effect, and then improve motor speed by being modified compensation to weak magnetoelectricity stream on the basis of existing weak magnetic method, and it is higher to compare existing weak magnetic speed-up revolving speed, improves motor driven performance, meets greater demand scene.
Description
Technical field
The present invention relates to driving motor technical fields, and in particular to a kind of motor field weakening control method, device and motor.
Background technique
With the development of new-energy automobile industry, the quantity of electric car is skyrocketed through, motor in electric automobile drive control
Core component of the system as electric car, it is the driveability for improving electric car, the root for travelling reliability and stability
This guarantee, therefore driving motor is the important research direction of new-energy automobile.For driving motor, under certain voltage, motor
The maximum speed (base speed) that can be run is difficult to meet actual demand, it is therefore desirable to the feelings constant in power of motor otherwise
Revolving speed is further increased under condition, i.e. invariable power mode promotes revolving speed.Weak magnetic speed-up is the common invariable power raising speed side of driving motor
Method, weak magnetic are the negative currents by increasing motor d shaft current, weaken magnetic flux, to realize the rising of revolving speed.But it is existing
Weak magnetic method, since the utilization rate of inverter output voltage is limited, causes weak magnetic speed-up effect limited in actually control, it is difficult to
Meet the actual demand of driving motor.
Summary of the invention
It is limited to solve field weakening control method raising speed effect in the prior art, it is difficult to which that the technology for meeting actual demand is asked
Topic, the present invention provides a kind of higher motor field weakening control method of weak magnetic speed-up effect, device and motors.
In a first aspect, the present invention provides a kind of field weakening control methods, comprising:
Obtain the output valve of q shaft voltage and the setting value of q shaft voltage under weak magnetic state；
The offset of weak magnetoelectricity stream is determined according to the output valve and the setting value；
Weak magnetoelectricity stream is compensated according to the offset.
In some embodiments, the offset packet that weak magnetoelectricity stream is determined according to the output valve and the setting value
It includes:
PI operation is carried out to the difference of the output valve and the setting value, obtains the offset.
In some embodiments, described compensated according to the offset to weak magnetoelectricity stream includes:
The current value of the offset and the weak magnetoelectricity stream is summed to obtain the correction value of d shaft current, is repaired based on described
Positive value adjustment d shaft current.
In some embodiments, the setting value V of the q shaft voltageq-refIt indicates are as follows:
In formula, VmaxFor system maximum voltage value, VdFor d shaft voltage value.
In some embodiments, the weak magnetoelectricity stream Id1It indicates are as follows:
In formula, VqFor q shaft voltage value, RsFor phase resistance, IqFor q shaft current value, LdFor d axle inductance, PIgFor q shaft current
Variable quantity, E are counter electromotive force, and ω is revolving speed.
6. field weakening control method according to claim 1, which is characterized in that
The output valve of the q shaft voltage is electric current loop output valve.
Second aspect, the present invention provides a kind of weak magnetic control devices, comprising:
Module is obtained, for obtaining the setting value of the output valve of q shaft voltage and q shaft voltage under weak magnetic state；
Determining module, for determining the offset of d shaft current according to the output valve and the setting value；And
Compensating module, for generating compensation electric current according to the offset, to be compensated to weak magnetoelectricity stream.
The third aspect, the present invention provides a kind of electronic equipment, comprising:
Processor；With
Memory, being stored with can communicate to connect with the processor, be stored with the meter that can be executed by the processor
Calculation machine readable instruction is performed in the computer-readable instruction, and the processor is executed according to reality any in first aspect
Apply field weakening control method described in mode.
Fourth aspect, the present invention provides a kind of motors, comprising:
Motor body；With
According to above-mentioned electronic equipment.
5th aspect, the present invention provides a kind of storage mediums, are stored with computer instruction, and the computer instruction is used for
Computer is set to execute the field weakening control method according to any embodiment in first aspect.
Motor field weakening control method provided by the invention, including obtaining the output valve of q shaft voltage and q axis electricity under weak magnetic state
The setting value of pressure determines the offset of d shaft current according to output valve and setting value, compensation electric current is generated according to offset, with right
Weak magnetoelectricity stream compensates.Control method of the invention, by being repaired to weak magnetoelectricity stream on the basis of existing weak magnetic method
Positive compensation improves motor weak magnetic effect, and then improves motor speed, and it is higher to compare existing weak magnetic speed-up revolving speed, improves motor and drives
Dynamic performance, meets greater demand scene.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow chart of motor field weakening control method in some embodiments according to the present invention.
Fig. 2 is the working principle diagram of middle motor weak magnetic control according to one embodiment of the present invention.
Fig. 3 is the structural schematic diagram of motor weak magnetic control device in some embodiments according to the present invention.
Fig. 4 is adapted for that control method or the Computer Systems Organization of processor are shown in embodiment of the present invention for realizing
It is intended to.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Mode is a part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, this field is general
Logical technical staff every other embodiment obtained without making creative work, belongs to protection of the present invention
Range.As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
Motor field weakening control method provided by the invention can be used for controlling such as permanent magnet synchronous motor, DC brushless motor
Equal driving motors carry out weak magnetic control to motor, improve motor speed.It should be noted that working as electricity in weak magnetic control system
For machine when base speed operates above, the amplitude of counter electromotive force E becomes closer to the maximum voltage U exported in inverter, may be expressed as:
U=E+IR (1)
Wherein, loss the sum of of the IR for motor, accounting very little, therefore under weak magnetic state, U ≈ E can be approximately considered.Instead
Electromotive force E is indicated are as follows:
E=CeΦω (2)
In formula, wherein CeFor back electromotive force constant, Φ is magnetic flux, and ω is revolving speed, and weak magnetic speedup, which is exactly based on, increases d axis
Negative current, so that magnetic field and rotor permanent magnet magnetic direction that electric current generates are on the contrary, to weaken magnetic flux Φ.By formula (2) it is found that
When magnetic flux Φ reduces, rotational speed omega rises, thus raising speed.In to motor weak magnetic control system, motor is weak by inverter power supply
Magnetoelectricity stream is limited by inverter fan-out capability, causes raising speed effect limited, it is difficult to meet driving motor demand.Of the invention
Control method is based on this, by compensating to weak magnetoelectricity stream, to improve motor speed.
As shown in Figure 1, in some embodiments, motor field weakening control method provided by the invention can include:
S10 obtains the output valve of q shaft voltage and the setting value of q shaft voltage under weak magnetic state.
S20 determines the offset of weak magnetoelectricity stream according to output valve and setting value.
S30 compensates weak magnetoelectricity stream according to offset.
Specifically, in the control method of the invention, the output valve and q axis of q shaft voltage first under acquisition weak magnetic state
The output valve of such as electric current loop can be used in the setting value of voltage, the output valve of q shaft voltage, is determined according to output valve and setting value weak
The offset of magnetoelectricity stream compensates weak magnetoelectricity stream according to offset, to increase the negative current of d shaft current, improves weak
Magnetic effect meets the usage scenario of requirements at the higher level to further increase motor speed.
In some embodiments, field weakening control method provided by the invention, the output valve of q shaft voltage are the defeated of electric current loop
It is worth out, the setting value of q shaft voltage is based on inverter maximum output voltage and provides, specifically, the setting value V of q shaft voltageq-refTable
It is shown as:
In formula, VmaxFor inverter maximum output voltage, VdFor d shaft voltage value.It is obtained by inverter maximum output voltage
Maximum setting value, offset Δ IdThe difference of output valve and setting value based on q shaft voltage carries out PI operation and obtains.It needs
Bright, in the control of motor weak magnetic, motor will be limited by inverter power supply, operation by inverter fan-out capability,
Inverter limitation includes two aspects: being on the one hand that current amplitude is limited, is on the other hand that voltage magnitude is limited.These two aspects limit
System can be expressed as in the plane using d shaft current and q shaft current as reference axis using origin as the current limitation in center of circle circle and electricity
Press the limit oval, theoretically motor operating point is located at the fan-out capability of motor when on current limitation circle and voltage limit ellipse most
Greatly.In the present embodiment, PI operation is carried out by the difference of maximum set value and the output valve of q shaft voltage, q shaft voltage is mentioned
Height improves the fan-out capability of motor to approach or be maintained at voltage limit circle for motor operating point.
PI operation, which is carried out, by the difference to setting value and the output valve of q shaft voltage obtains the offset Δ of weak magnetoelectricity stream
Id, by offset Δ IdIt compensates to weak magnetoelectricity stream Id1In, Id1For the weak magnetoelectricity stream in the control of conventional weak magnetic, weak magnetoelectricity stream Id1It indicates
Are as follows:
In formula, VqFor q shaft voltage value, RsFor phase resistance, IqFor q shaft current value, LdFor d axle inductance, PIqFor q shaft current
Variable quantity, E are counter electromotive force, and ω is revolving speed.To offset Δ IdWith weak magnetoelectricity stream Id1Summation obtains compensated d shaft current
Correction value Id, the correction value I based on d shaft currentdAdjust d shaft current.By being compensated to weak magnetoelectricity stream, so that it is negative to increase d axis
To electric current, and then improve motor speed.
Weak magnetic in some embodiments according to the present invention is shown in Fig. 2 and controls working principle diagram, below with reference to Fig. 2 to this
Invention control method further illustrates.
In the present embodiment, in step slo, acquisition obtains electric current loop output valve Vqref, q axis is calculated by formula (3)
The setting value V of voltageq-ref, it is based on electric current loop output valve VqrefWith setting value Vq-refOffset value calculation Δ Id, indicate are as follows:
ΔId=PI [Vq-ref-Vqref]
Weak magnetoelectricity stream value I is calculated using formula (4)d1, by offset Δ IdIt compensates to weak magnetoelectricity stream Id1In, i.e., to offset Δ
IdWith weak magnetoelectricity stream Id1Summation obtains the correction value I of compensated d shaft currentd, indicate are as follows:
Id=Id1+ΔId
Correction value I based on d shaft currentdD shaft current is adjusted, by compensating to weak magnetoelectricity stream, so that it is negative to increase d axis
To electric current, and then improve motor speed.
Second aspect, the present invention provides a kind of weak magnetic control devices, comprising:
Module 10 is obtained, for obtaining the setting value of the output valve of q shaft voltage and q shaft voltage under weak magnetic state；
Determining module 20, for determining the offset of d shaft current according to output valve and setting value；And
Compensating module 30, for generating compensation electric current according to offset, to be compensated to weak magnetoelectricity stream.
The third aspect, the present invention provides a kind of electronic equipment, comprising:
Processor；With
Memory, being stored with can communicate to connect with the processor, be stored with the meter that can be executed by the processor
Calculation machine readable instruction is performed in the computer-readable instruction, and the processor is executed according to any of the above-described embodiment
The field weakening control method.
Fourth aspect, the present invention provides a kind of motors, comprising:
Motor body；With
The electronic equipment of root according to the above.
5th aspect, the present invention provides a kind of storage mediums, are stored with computer instruction, and the computer instruction is used for
Computer is set to execute the field weakening control method according to any of the above-described embodiment.
Specifically, Fig. 4 shows the pupil detection method or processor for being suitable for being used to realize embodiment of the present invention
The structural schematic diagram of computer system 600 realizes above-mentioned electronic equipment and storage medium corresponding function by system shown in Figure 4.
As shown in figure 4, computer system 600 includes central processing unit (CPU) 601, it can be read-only according to being stored in
Program in memory (ROM) 602 or be loaded into the program in random access storage device (RAM) 603 from storage section 608 and
Execute various movements appropriate and processing.In RAM 603, also it is stored with system 600 and operates required various programs and data.
CPU 601, ROM 602 and RAM 603 are connected with each other by bus 604.Input/output (I/O) interface 605 is also connected to always
Line 604.
I/O interface 605 is connected to lower component: the importation 606 including keyboard, mouse etc.；It is penetrated including such as cathode
The output par, c 607 of spool (CRT), liquid crystal display (LCD) etc. and loudspeaker etc.；Storage section 608 including hard disk etc.；
And the communications portion 609 of the network interface card including LAN card, modem etc..Communications portion 609 via such as because
The network of spy's net executes communication process.Driver 610 is also connected to I/O interface 605 as needed.Detachable media 611, such as
Disk, CD, magneto-optic disk, semiconductor memory etc. are mounted on as needed on driver 610, in order to read from thereon
Computer program be mounted into storage section 608 as needed.
Particularly, according to embodiment of the present disclosure, the process of method description above may be implemented as computer software
Program.For example, embodiment of the present disclosure includes a kind of computer program product comprising be tangibly embodied in machine readable Jie
Computer program in matter, computer program include the program code for executing above-mentioned method.In such embodiment
In, which can be downloaded and installed from network by communications portion 609, and/or from 611 quilt of detachable media
Installation.
Flow chart and block diagram in attached drawing illustrate system, method and computer according to the various embodiments of the present invention
The architecture, function and operation in the cards of program product.In this regard, each box in flowchart or block diagram can be with
A part of a module, program segment or code is represented, a part of module, program segment or code includes one or more uses
The executable instruction of the logic function as defined in realizing.It should also be noted that in some implementations as replacements, being marked in box
The function of note can also occur in a different order than that indicated in the drawings.For example, two boxes succeedingly indicated are actually
It can be basically executed in parallel, they can also be executed in the opposite order sometimes, and this depends on the function involved.Also it to infuse
Meaning, the combination of each box in block diagram and or flow chart and the box in block diagram and or flow chart can be with holding
The dedicated hardware based system of functions or operations as defined in row is realized, or can use specialized hardware and computer instruction
Combination realize.
Obviously, above embodiment is only intended to clearly illustrate example, and does not limit the embodiments.
For those of ordinary skill in the art, other various forms of variations can also be made on the basis of the above description
Or it changes.There is no necessity and possibility to exhaust all the enbodiments.And obvious variation extended from this
Or it changes still within the protection scope of the invention.
Claims (10)
1. a kind of field weakening control method characterized by comprising
Obtain the output valve of q shaft voltage and the setting value of q shaft voltage under weak magnetic state；
The offset of weak magnetoelectricity stream is determined according to the output valve and the setting value；
Weak magnetoelectricity stream is compensated according to the offset.
2. field weakening control method according to claim 1, which is characterized in that described according to the output valve and the setting
Value determines that the offset of weak magnetoelectricity stream includes:
PI operation is carried out to the difference of the output valve and the setting value, obtains the offset.
3. field weakening control method according to claim 2, which is characterized in that it is described according to the offset to weak magnetoelectricity stream
It compensates and includes:
The current value of the offset and the weak magnetoelectricity stream is summed to obtain the correction value of d shaft current, is based on the correction value
Adjust d shaft current.
4. field weakening control method according to any one of claims 1 to 3, which is characterized in that
The setting value V of the q shaft voltageq-refIt indicates are as follows:
In formula, VmaxFor system maximum voltage value, VdFor d shaft voltage value.
5. field weakening control method according to any one of claims 1 to 3, which is characterized in that the weak magnetoelectricity stream Id1It indicates
Are as follows:
In formula, VqFor q shaft voltage value, RsFor phase resistance, IqFor q shaft current value, LdFor d axle inductance, PIqFor the variation of q shaft current
Amount, E is counter electromotive force, and ω is revolving speed.
6. field weakening control method according to claim 1, which is characterized in that
The output valve of the q shaft voltage is electric current loop output valve.
7. a kind of weak magnetic control device characterized by comprising
Module is obtained, for obtaining the setting value of the output valve of q shaft voltage and q shaft voltage under weak magnetic state；
Determining module, for determining the offset of d shaft current according to the output valve and the setting value；And
Compensating module, for being compensated according to the offset to weak magnetoelectricity stream.
8. a kind of electronic equipment characterized by comprising
Processor；With
Memory, being stored with can communicate to connect with the processor, be stored with the computer that can be executed by the processor
Readable instruction is performed in the computer-readable instruction, and the processor executes described in any item according to right 1 to 6
Field weakening control method.
9. a kind of motor characterized by comprising
Motor body；With
Electronic equipment according to claim 8.
10. a kind of storage medium, which is characterized in that be stored with computer instruction, the computer instruction is for holding computer
Row field weakening control method according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910605885.0A CN110224650B (en) | 2019-07-05 | 2019-07-05 | Flux-weakening control method and device and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910605885.0A CN110224650B (en) | 2019-07-05 | 2019-07-05 | Flux-weakening control method and device and motor |
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| Publication Number | Publication Date |
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| CN110224650A true CN110224650A (en) | 2019-09-10 |
| CN110224650B CN110224650B (en) | 2021-08-27 |
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| CN201910605885.0A Active CN110224650B (en) | 2019-07-05 | 2019-07-05 | Flux-weakening control method and device and motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529979A (en) * | 2019-09-12 | 2019-12-03 | 宁波奥克斯电气股份有限公司 | A kind of motor control method, device and air conditioner |
| WO2024021763A1 (en) * | 2022-07-29 | 2024-02-01 | 青岛海尔空调器有限总公司 | Control method and apparatus for air conditioner, and air conditioner and storage medium |
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| CN103701384A (en) * | 2013-12-30 | 2014-04-02 | 中冶南方（武汉）自动化有限公司 | Field weakening control method for built-in permanent magnet synchronous motor |
| KR20180112629A (en) * | 2017-04-04 | 2018-10-12 | 대우조선해양 주식회사 | Method for weak field control of induction motor |
| CN109804550A (en) * | 2016-10-25 | 2019-05-24 | 密克罗奇普技术公司 | Closed loop magnetic flux for permanent magnet synchronous motor weakens |
| CN109831132A (en) * | 2019-01-23 | 2019-05-31 | 上海肖可雷电子科技有限公司 | A kind of field weakening control method of permanent magnet synchronous motor |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103701384A (en) * | 2013-12-30 | 2014-04-02 | 中冶南方（武汉）自动化有限公司 | Field weakening control method for built-in permanent magnet synchronous motor |
| CN109804550A (en) * | 2016-10-25 | 2019-05-24 | 密克罗奇普技术公司 | Closed loop magnetic flux for permanent magnet synchronous motor weakens |
| KR20180112629A (en) * | 2017-04-04 | 2018-10-12 | 대우조선해양 주식회사 | Method for weak field control of induction motor |
| CN109831132A (en) * | 2019-01-23 | 2019-05-31 | 上海肖可雷电子科技有限公司 | A kind of field weakening control method of permanent magnet synchronous motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110529979A (en) * | 2019-09-12 | 2019-12-03 | 宁波奥克斯电气股份有限公司 | A kind of motor control method, device and air conditioner |
| WO2024021763A1 (en) * | 2022-07-29 | 2024-02-01 | 青岛海尔空调器有限总公司 | Control method and apparatus for air conditioner, and air conditioner and storage medium |
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| CN110224650B (en) | 2021-08-27 |
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