CN110535387A - Current amplitude adjusting method, system, equipment and computer readable storage medium - Google Patents
Current amplitude adjusting method, system, equipment and computer readable storage medium Download PDFInfo
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- CN110535387A CN110535387A CN201910699031.3A CN201910699031A CN110535387A CN 110535387 A CN110535387 A CN 110535387A CN 201910699031 A CN201910699031 A CN 201910699031A CN 110535387 A CN110535387 A CN 110535387A
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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
- H02P21/0003—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
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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
- H02P21/14—Estimation or adaptation of machine parameters, e.g. flux, current or voltage
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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
- H02P21/22—Current control, e.g. using a current control loop
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Abstract
The embodiment of the invention discloses a kind of current amplitude adjusting method, system, equipment and computer readable storage mediums, this method comprises: obtaining the power-factor angle of the hair wave signal of the electric machine controller in real time, and the output electric current and output voltage of electric machine controller described in real-time sampling；It is calculated in real time according to the power-factor angle, output electric current and output voltage with reference to angle value of feedback；According to described with reference to angle value of feedback and with reference to the amplitude of the real-time adjustment instruction electric current of angle preset value, the current phase angle being greater than when the electromagnetic torque that the electric machine controller exports reaches maximum with reference to angle preset value.The embodiment of the present invention by according to according to reference angle value of feedback and with reference to the real-time adjustment instruction electric current of angle preset value amplitude to realize the amplitude of the instruction current of adjustment electric machine controller in real time, to guarantee that permanent magnet synchronous motor keeps synchronous effect.
Description
Technical field
The present embodiments relate to permanent magnet synchronous motor frequency control field more particularly to a kind of current amplitude adjusting sides
Method, system, equipment and computer readable storage medium.
Background technique
The difficult point of permanent magnet synchronous motor vector control without position sensor is that weathering zone load is started and run, therefore is much controlled
Scheme processed all uses closed loop current in low speed, i.e. I/F control, and I/F controls work in speed open loop, current closed-loop state, such as
Shown in Fig. 1, the amplitude of electric current can have generally been planned in advance and according to the speed of open loop with rotating coordinate system synchronous rotary, in difference
Frequency under run under run with fixed electric current, regardless of load is unloaded or heavy duty.Planning current amplitude has following at present
Two methods:
1) be fixed as constant value at different frequencies, due to heavy duty to be guaranteed can run it is out-of-step free, so fixed
Value it is generally all bigger, it is more than rated current of motor or rated current of motor.However the method is controlled under different loads
The output electric current of device processed is the same, if load is zero load, theoretically electric current is close to zero, but uses fixed current
Method actual current is but very big, and very big copper loss will be generated on electric motor resistance, causes the efficiency of entire electric machine control system
It is very low, the due energy-efficient effect of controller can not be played.
2) it is directed to load characteristic, different current amplitudes is planned at different frequencies, can be linear be also possible to
Exponential form, on condition that each load is fixed with the variation of frequency.However in the method, although electric machine controller is defeated
Electric current out changes with the variation of frequency, but this variation is that segregation reasons are good, and the rule changed every time is all identical
, therefore the load that can only be directed to identical rule is just significant, if loadtype is changed, it is likely that motor is caused to lose
Step, can not start.
Summary of the invention
The resistance copper loss that the embodiment of the present invention is directed to motor when above-mentioned load is unloaded is big, the control effect of electric machine control system
The problem of rate is low, and the type loaded changes and leads to permanent magnet synchronous motor step-out, can not start, the embodiment of the present invention
A kind of current amplitude adjusting method, system, equipment and computer readable storage medium are provided, to adjust electric machine controller in real time
The amplitude of instruction current to guarantee that permanent magnet synchronous motor keeps synchronizing, while reducing the resistance copper loss of motor when zero load, mentions
The control efficiency of high machine control system.
The technical solution that the embodiment of the present invention solves above-mentioned technical problem is: providing a kind of current amplitude adjusting method, uses
The amplitude of instruction current in adjustment electric machine controller, and the electric machine controller is for realizing the frequency conversion control of permanent magnet synchronous motor
System, comprising:
The power-factor angle of the hair wave signal of the electric machine controller, and electric machine controller described in real-time sampling are obtained in real time
Output electric current and output voltage；
It is calculated in real time according to the power-factor angle, output electric current and output voltage with reference to angle value of feedback；
According to described with reference to angle value of feedback and with reference to the amplitude of the real-time adjustment instruction electric current of angle preset value, the reference
The electromagnetic torque that angle preset value is greater than electric machine controller output reaches current phase angle when maximum.
Preferably, described obtained in real time according to the power-factor angle, output electric current and output voltage is fed back with reference to angle
Value, comprising:
The output electric current is coordinately transformed, the output electric current under rectangular coordinate system is obtained；
Output electric current under the rectangular coordinate system is done into rotation transformation according to the power-factor angle, obtains rotational coordinates
Output electric current under system；
Output voltage virtual value is obtained according to the output voltage；
According to the output electric current under the power-factor angle, rotating coordinate system and described in output voltage virtual value calculates in real time
With reference to angle value of feedback.
Preferably, described to be obtained with reference to angle value of feedback according to following calculated value:
Wherein,It is the power-factor angle for the hair wave signal that δ is the electric machine controller, i to refer to angle value of feedbackδFor
The corresponding size of current of the stator current signal, V are the virtual value of the output voltage, and R is the permanent magnet synchronous motor
Equivalent resistance；The Xq=2 π × f × Lq, and f is the frequency of the output voltage of the electric machine controller, LqIt is same for the permanent magnetism
Walk the inductance value of the q axis of motor.
Preferably, the electric machine controller includes pi regulator, described to be pressed from both sides according to described with reference to angle value of feedback and reference
The amplitude of the real-time adjustment instruction electric current of angle preset value, comprising:
The amplitude of described instruction electric current is generated using the pi regulator, the input of the pi regulator is described with reference to folder
The difference of angle preset value and reference angle value of feedback, the output of the pi regulator are the amplitude of described instruction electric current.
Preferably, described to be with reference to angle preset valueAnd
Wherein, ψmFor the magnetic linkage that the rotor of the permanent magnet synchronous motor generates, LdFor the d axis electricity of the permanent magnet synchronous motor
Inductance value, LqFor the inductance value of the q axis of the permanent magnet synchronous motor, IsIt is adjusted for a upper current amplitude for the electric machine controller
The amplitude of the instruction current issued when the period, α are constant, and 10 ° of 45 ° of < α <.
The embodiment of the present invention also provides a kind of current amplitude regulating system, for adjusting instruction current in electric machine controller
Amplitude, and the electric machine controller is for realizing the frequency control of permanent magnet synchronous motor, comprising:
Module is obtained, the power-factor angle of the hair wave signal for obtaining the electric machine controller in real time, and real-time sampling
The output electric current and output voltage of the electric machine controller；
Computing module, it is anti-with reference to angle for being calculated in real time according to the power-factor angle, output electric current and output voltage
Feedback value；
Adjust module, for according to described with reference to angle value of feedback and with reference to the real-time adjustment instruction electric current of angle preset value
Amplitude, the current phase being greater than when the electromagnetic torque that the electric machine controller exports reaches maximum with reference to angle preset value
Angle.
Preferably, the computing module includes:
Subelement is converted, for the output electric current to be coordinately transformed, obtains the output electric current under rectangular coordinate system；
List member is rotated, is become for the output electric current under the rectangular coordinate system to be done rotation according to the power-factor angle
It changes, obtains the output electric current under rotating coordinate system；
Subelement is obtained, for obtaining output voltage virtual value according to the output voltage；
Computation subunit, for the output electric current and output voltage according to the power-factor angle, power factor angular direction
Virtual value is calculated in real time with reference to angle value of feedback.
Preferably, the electric machine controller includes pi regulator, and the adjustment module is specifically used for: being adjusted using the PI
Device generates the amplitude of described instruction electric current, and the input of the pi regulator is described with reference to angle preset value and with reference to angle feedback
The difference of value, the output of the pi regulator are the amplitude of described instruction electric current.
The embodiment of the present invention also provides a kind of current amplitude and adjusts machine equipment, including memory, processor and is stored in
In the memory and the computer program that can run on the processor, when the processor executes the computer program
The step of realizing the current amplitude adjusting method.
The embodiment of the present invention also provides a kind of computer readable storage medium, and the computer-readable recording medium storage has
The step of computer program, the computer program realizes current amplitude adjusting method when being executed by processor.
Current amplitude adjusting method, system, equipment and the computer readable storage medium of the embodiment of the present invention, by real-time
The amplitude for adjusting the instruction current of electric machine controller output enables electric machine controller according to the difference of load, adjusts in real time
The electric current that permanent magnet synchronous motor keeps synchronous is inputted, is avoided since load changes, and the electric current of input load can not be with
The problem of changing with load and changing, so that the permanent magnet synchronous motor moment keeps synchronizing, simultaneously as the amplitude root of instruction current
Change according to the variation of load, so that in zero load, the electric current of input load is 0, to realize motor when reducing unloaded
Resistance copper loss, improve the effect of the control efficiency of machine control system.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below by institute in the description to the embodiment of the present invention
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the flow diagram for the current amplitude adjusting method that one embodiment of the invention provides；
Fig. 2 be another embodiment of the present invention provides current amplitude adjusting method flow diagram；
Fig. 3 is that electric current showing under rectangular coordinate system is exported in the current amplitude adjusting method of one embodiment of the invention offer
It is intended to；
Fig. 4 is that the output electric current in the current amplitude adjusting method of one embodiment of the invention offer under rectangular coordinate system is obtaining
Obtain the schematic diagram under rotating coordinate system；
Fig. 5 is a schematic diagram figure of the current amplitude regulating system that one embodiment of the invention provides；
Fig. 6 is a schematic diagram of the current amplitude adjustment equipment that one embodiment of the invention provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
In electric machine controller operational process, when the electromagnetic torque of output reaches balance with load torque, stator current
Angle between q axis is that a definite value (is denoted as), the rotor of permanent magnet synchronous motor can keep synchronous with current phasor at this time
Rotation.When load torque increases, since the electromagnetic torque of electric machine controller output is less than load torque, at this time permanent magnet synchronous electric
Machine will slow down, the angle between stator current and q axisIt will reduce, output electromagnetic torque will will increase, stator current arrow
Amount and the angle of q axis will reach equilibrium state a new position.Similarly, when load torque reduces, permanent magnet synchronous electric
Machine will accelerate, angleIt will will increase, output electromagnetic torque will reduce, equally it can reach balance a new position,
This characteristic is referred to as " torque-generator rotor angle self-balancing " characteristic.But if load torque is greater than the maximum electricity that electric current can be output
When magnetic torque, angleIt can be decreased to less thanRegion, motor output torque will continue to reduce at this time, and motor can lose stabilization
The condition of operation, generate step-out failure, therefore under motoring condition self-balancing region angular range it is as follows:
So if can controlIt would not step-out in the region of self-balancing.
For this purpose, passing through the finger exported to electric machine controller the embodiment of the invention provides a kind of current amplitude adjusting method
The amplitude of electric current is enabled to be adjusted, so that the angle between stator current and q axisIt is maintained at self-balancing region in real time, to make
Obtain the purpose that permanent magnet synchronous motor keeps synchronous.
In one embodiment, as shown in Figure 1, providing a kind of current effective value adjusting method, this method can apply motor control
Device processed, and this method comprises the following steps:
S10: the power-factor angle of the hair wave signal of electric machine controller is obtained in real time, and real-time sampling electric machine controller is defeated
Electric current and output voltage out.
Wherein, hair wave signal refers to that electric machine controller controls the voltage or current of input permanent magnet synchronous motor
When, the control signal that is issued；Power-factor angle refers to the phase difference of the voltage and current in the hair wave signal of electric machine controller；
The output electric current of electric machine controller is the stator current for inputting permanent magnet synchronous motor.Specifically, due to the hair of electric machine controller
Wave signal is generally current signal or voltage signal, therefore, the electric current and voltage that can be exported by calculating electric machine controller
Between phase difference obtain power-factor angle.In addition, passing through the output electric current for obtaining sample circuit real-time sampling electric machine controller
And output voltage.
S20: it is calculated in real time according to power-factor angle, output electric current and output voltage with reference to angle value of feedback.
Wherein, the angle with reference to angle value of feedback between stator current and q axis.
In conjunction with Fig. 2, the step is specific can include:
S21: output electric current is coordinately transformed (i.e. Clarke transform), the output electric current under rectangular coordinate system is obtained.
Exporting schematic diagram of the electric current under rectangular coordinate system can be as shown in Figure 3.Output electric current is coordinately transformed, it will
In three phase projections to rectangular coordinate system for exporting electric current, so that the output current equivalence of three-phase is d shaft current and q axis electricity
Stream.
S22: the output electric current under rectangular coordinate system is done rotation transformation (i.e. Parker transform) according to power-factor angle, is obtained
Output electric current under rotating coordinate system.
Schematic diagram of the output electric current in the case where obtaining rotating coordinate system under rectangular coordinate system can be as shown in Figure 4.
S23: output voltage virtual value is obtained according to output voltage.
S24: according under power-factor angle, rotating coordinate system output electric current and output voltage virtual value calculate reference in real time
Angle value of feedback.
The amplitude that pi regulator generates instruction current specifically can be used in the step, wherein the input of pi regulator is ginseng
Angle preset value and the difference with reference to angle value of feedback are examined, the output of pi regulator is the amplitude of instruction current.
Wherein, it is obtained with reference to angle value of feedback according to following calculating formula (1):
Wherein,It is the power-factor angle for the hair wave signal that δ is electric machine controller, i to refer to angle value of feedbackδFor rotation
Output electric current under coordinate system, V are the virtual value of output voltage, and R is the equivalent resistance of permanent magnet synchronous motor；Xq=2 π × f ×
Lq, and f is the frequency of the output voltage of electric machine controller, LqFor the inductance of the q axis of permanent magnet synchronous motor.
S30: according to reference angle value of feedback and with reference to the amplitude of the real-time adjustment instruction electric current of angle preset value, angle is default
The electromagnetic torque that value is greater than electric machine controller output reaches current phase angle when maximum.
In view of the stability of permanent magnet synchronous motor, angle preset value would generally there are certain allowances, it is assumed that angle is pre-
If value isAllowance is α, then angle preset value isAnd
Wherein, ψmFor the magnetic linkage that the rotor of permanent magnet synchronous motor generates, LdFor the d axle inductance of permanent magnet synchronous motor, LqFor forever
The inductance of the q axis of magnetic-synchro motor, IsThe instruction current issued when adjusting the period for a upper current amplitude for electric machine controller
Amplitude, α is constant, and 10 ° of 45 ° of < α <.
The embodiment by adjusting instruction current amplitude so that when the load increases, the amplitude of instruction current also increases,
When the load decreases, the amplitude of instruction current is also reduced, to change the angle between stator current and q axisTo controlIn the region of self-balancing, it can both guarantee that permanent magnet synchronous motor was synchronous in this way, the stability of system can also be maintained.
In one embodiment, a kind of current amplitude regulating system is provided, the current amplitude regulating system and above-described embodiment
Middle current amplitude adjusting method corresponds.As shown in figure 5, the current amplitude regulating system includes obtaining module 10, calculating mould
Block 20 and adjustment module 30.Wherein:
Module 10 is obtained, the power-factor angle of the hair wave signal for obtaining electric machine controller in real time, and real-time sampling electricity
The output electric current and output voltage of machine controller.
Computing module 20 is fed back for being calculated in real time according to power-factor angle, output electric current and output voltage with reference to angle
Value；
Module 30 is adjusted, for according to reference angle value of feedback and with reference to the width of the real-time adjustment instruction electric current of angle preset value
Value is greater than the current phase angle when electromagnetic torque that electric machine controller exports reaches maximum with reference to angle preset value.
In specific implementation, above-mentioned computing module 20 further include: transformation subelement 21, obtains son list at rotation subelement 22
Member 23 and computation subunit 24.Wherein:
Subelement 21 is converted, is coordinately transformed (i.e. Clarke transform) for electric current will to be exported, rectangular coordinate system is obtained
Under output electric current.
Subelement 22 is rotated, for the output electric current under rectangular coordinate system to be done rotation transformation (i.e. according to power-factor angle
Parker transform), obtain the output electric current under rotating coordinate system.
Subelement 23 is obtained, for obtaining output voltage virtual value according to output voltage.
Computation subunit 24, for being had according to the output electric current and output voltage of power-factor angle, power factor angular direction
Valid value is calculated in real time with reference to angle value of feedback.It should be noted that computation subunit 24 is mainly calculated by following calculating formula (3)
It obtains with reference to angle value of feedback:
Wherein,It is the power-factor angle for the hair wave signal that δ is electric machine controller, i to refer to angle value of feedbackδFor rotation
Output electric current under coordinate system, V are the virtual value of output voltage, and R is the equivalent resistance of permanent magnet synchronous motor.Xq=2 π × f ×
Lq, and f is the frequency of the output voltage of electric machine controller, LqFor the inductance of the q axis of permanent magnet synchronous motor.
Adjustment module 30 is specifically used for: the amplitude of instruction current is generated using pi regulator, the input of pi regulator is ginseng
Angle preset value and the difference with reference to angle value of feedback are examined, the output of pi regulator is the amplitude of instruction current.Wherein, mould is adjusted
Block 30 is calculated especially by following calculating formula (4) with reference to angle preset value:And
Wherein, ψmFor the magnetic linkage that the rotor of permanent magnet synchronous motor generates, LdFor the d axle inductance value of permanent magnet synchronous motor, LqFor
The inductance value of the q axis of permanent magnet synchronous motor, IsThe instruction issued when adjusting the period for a upper current amplitude for electric machine controller
The amplitude of electric current, α are constant, and 10 ° of 45 ° of < α <.
The current amplitude adjusting method category in current amplitude regulating system and above-mentioned Fig. 1 corresponding embodiment in the present embodiment
In same design, specific implementation process is shown in corresponding embodiment of the method in detail, and the technical characteristic in embodiment of the method is at this
Corresponding in apparatus embodiments to be applicable in, which is not described herein again.
The embodiment of the present invention also provides a kind of current amplitude adjustment equipment 6, which specifically can be electric machine controller,
As shown in fig. 6, the current amplitude adjustment equipment 6 includes memory 61 and processor 62, it is stored with and can handling in memory 61
The computer program that device 62 executes, and current amplitude adjusting method as described above is realized when the execution computer program of processor 62
Step.
The current amplitude adjusting method in current amplitude adjustment equipment 6 and above-mentioned Fig. 1 corresponding embodiment in the present embodiment
Belong to same design, specific implementation process is shown in corresponding embodiment of the method in detail, and the technical characteristic in embodiment of the method exists
Corresponding in this apparatus embodiments to be applicable in, which is not described herein again.
The embodiment of the present invention also provides a kind of computer readable storage medium, and computer journey is stored on the storage medium
Sequence, when computer program is executed by processor, the step of realizing current amplitude adjusting method as described above.Meter in the present embodiment
Current amplitude adjusting method in calculation machine readable storage medium storing program for executing and above-mentioned Fig. 1 corresponding embodiment belongs to same design, specific real
Existing process is shown in corresponding embodiment of the method in detail, and the technical characteristic in embodiment of the method is corresponding suitable in this apparatus embodiments
With which is not described herein again.
It should be understood that the size of the serial number of each step is not meant that the order of the execution order in above-described embodiment, each process
Execution sequence should be determined by its function and internal logic, the implementation process without coping with the embodiment of the present application constitutes any limit
It is fixed.
It is apparent to those skilled in the art that for convenience of description and succinctly, only with above-mentioned each function
Can unit, module division progress for example, in practical application, can according to need and by above-mentioned function distribution by different
Functional unit, module are completed.Each functional unit in embodiment, module can integrate in a processor, be also possible to each
A unit physically exists alone, and can also be integrated in one unit with two or more units, and above-mentioned integrated unit was both
It can take the form of hardware realization, can also realize in the form of software functional units.In addition, each functional unit, module
Specific name be also only for convenience of distinguishing each other, the protection scope being not intended to limit this application.Unit in above system,
The specific work process of module, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician
Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed
Scope of the present application.
In embodiment provided herein, it should be understood that disclosed current amplitude adjusting method, system and set
It is standby, it may be implemented in other ways.For example, current amplitude regulating system embodiment described above is only schematic
's.
In addition, each functional unit in each embodiment of the application can integrate in a processor, it is also possible to
Each unit physically exists alone, and can also be integrated in one unit with two or more units.Above-mentioned integrated unit
Both it can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated module/unit be realized in the form of SFU software functional unit and as independent product sale or
In use, can store in a computer readable storage medium.Based on this understanding, the application realizes above-mentioned implementation
All or part of the process in example method, can also instruct relevant hardware to complete, the meter by computer program
Calculation machine program can be stored in a computer readable storage medium, the computer program when being executed by processor, it can be achieved that on
The step of stating each embodiment of the method.Wherein, the computer program includes computer program code, the computer program generation
Code can be source code form, object identification code form, executable file or certain intermediate forms etc..The computer-readable medium
It may include: any entity or changing interface equipment, recording medium, USB flash disk, the movement that can carry the computer program code
Hard disk, magnetic disk, CD, computer storage, read-only memory (Read-Only Memory, ROM), random access memory
(Random Access Memory, RAM), electric carrier signal, telecommunication signal and software distribution medium etc..
Embodiment described above is only to illustrate the technical solution of the application, rather than its limitations；Although referring to aforementioned reality
Example is applied the application is described in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution should all
Comprising within the scope of protection of this application.
Claims (10)
1. a kind of current amplitude adjusting method, for adjusting the amplitude of instruction current in electric machine controller, and the motor control
Device for realizing permanent magnet synchronous motor frequency control, which is characterized in that the described method includes:
The power-factor angle of the hair wave signal of the electric machine controller is obtained in real time, and electric machine controller described in real-time sampling is defeated
Electric current and output voltage out；
It is calculated in real time according to the power-factor angle, output electric current and output voltage with reference to angle value of feedback；
It is described to refer to angle according to described with reference to angle value of feedback and with reference to the amplitude of the real-time adjustment instruction electric current of angle preset value
The electromagnetic torque that preset value is greater than electric machine controller output reaches current phase angle when maximum.
2. current amplitude adjusting method as described in claim 1, which is characterized in that it is described according to the power-factor angle, it is defeated
Electric current and output voltage are calculated in real time with reference to angle value of feedback out, comprising:
The output electric current is coordinately transformed, the output electric current under rectangular coordinate system is obtained；
Output electric current under the rectangular coordinate system is done into rotation transformation according to the power-factor angle, is obtained under rotating coordinate system
Output electric current；
Output voltage virtual value is obtained according to the output voltage；
According under the power-factor angle, rotating coordinate system output electric current and output voltage virtual value calculate the reference in real time
Angle value of feedback.
3. current amplitude adjusting method as claimed in claim 2, which is characterized in that the reference angle value of feedback is according to following
Calculating formula obtains:
Wherein,To refer to angle value of feedback, δ is the power-factor angle of the hair wave signal of the electric machine controller, iδFor the rotation
Turn the output electric current under coordinate system, V is the virtual value of the output voltage, and R is the equivalent resistance of the permanent magnet synchronous motor；Institute
State Xq=2 π × f × Lq, and f is the frequency of the output voltage of the electric machine controller, LqFor the q axis of the permanent magnet synchronous motor
Inductance.
4. current amplitude adjusting method as described in claim 1, which is characterized in that the electric machine controller includes that PI is adjusted
Device, it is described according to the amplitude with reference to angle value of feedback and the reference real-time adjustment instruction electric current of angle preset value, comprising:
The amplitude of described instruction electric current is generated using the pi regulator, the input of the pi regulator is described pre- with reference to angle
If value and the difference with reference to angle value of feedback, the output of the pi regulator is the amplitude of described instruction electric current.
5. current amplitude adjusting method as described in claim 1, which is characterized in that described to be with reference to angle preset valueAnd
Wherein, ψmFor the magnetic linkage that the rotor of the permanent magnet synchronous motor generates, LdFor the d axle inductance value of the permanent magnet synchronous motor,
LqFor the inductance value of the q axis of the permanent magnet synchronous motor, IsWhen adjusting the period for a upper current amplitude for the electric machine controller
The amplitude of the instruction current of sending, α are constant, and 10 ° of 45 ° of < α <.
6. a kind of current amplitude regulating system, for adjusting the amplitude of instruction current in electric machine controller, and the motor control
Device for realizing permanent magnet synchronous motor frequency control characterized by comprising
Module is obtained, the power-factor angle of the hair wave signal for obtaining the electric machine controller in real time, and described in real-time sampling
The output electric current and output voltage of electric machine controller；
Computing module, for being calculated in real time according to the power-factor angle, output electric current and output voltage with reference to angle value of feedback；
Module is adjusted, for according to the width with reference to angle value of feedback and the reference real-time adjustment instruction electric current of angle preset value
Value, the current phase angle being greater than when the electromagnetic torque that the electric machine controller exports reaches maximum with reference to angle preset value.
7. current amplitude regulating system as claimed in claim 6, which is characterized in that the computing module includes:
Subelement is converted, for the output electric current to be coordinately transformed, obtains the output electric current under rectangular coordinate system；
Subelement is rotated, for the output electric current under the rectangular coordinate system to be done rotation transformation according to the power-factor angle,
Obtain the output electric current under rotating coordinate system；
Subelement is obtained, for obtaining output voltage virtual value according to the output voltage；
Computation subunit, for effective according to the output electric current and output voltage of the power-factor angle, power factor angular direction
Value calculates refer to angle value of feedback in real time.
8. current amplitude regulating system as claimed in claim 7, which is characterized in that the electric machine controller includes that PI is adjusted
Device, the adjustment module are specifically used for: the amplitude of described instruction electric current is generated using the pi regulator, the pi regulator
Input is described with reference to angle preset value and with reference to the difference of angle value of feedback, and the output of the pi regulator is described instruction electricity
The amplitude of stream.
9. a kind of current amplitude adjustment equipment, including memory, processor and storage are in the memory and can be described
The computer program run on processor, which is characterized in that the processor realizes such as right when executing the computer program
It is required that the step of any one of 1 to 5 current amplitude adjusting method.
10. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In realizing the current amplitude adjusting method as described in any one of claim 1 to 5 when the computer program is executed by processor
Step.
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