CN105024604B - A kind of method and a device for controlling weak magnetism of permagnetic synchronous motor - Google Patents
A kind of method and a device for controlling weak magnetism of permagnetic synchronous motor Download PDFInfo
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Abstract
The embodiment of the invention discloses a kind of method and a device for controlling weak magnetism of permagnetic synchronous motor, it is related to permagnetic synchronous motor field, to shorten debug time, and improves systematic function.Method provided in an embodiment of the present invention, including：The first regulated value of d shaft currents is obtained according to the actual value of DC bus-bar voltage；The second regulated value of d shaft currents is obtained according to the actual value of the index parameter of rotor；The index parameter includes following any：Frequency, angular frequency, rotating speed；According to first regulated value and second regulated value, the regulated value of d shaft currents is obtained；According to the initial set-point of d shaft currents and the regulated value of the d shaft currents, the desired value of d shaft currents is obtained；Wherein, the desired value of the d shaft currents is negative value；The permagnetic synchronous motor operation is controlled according to the desired value of the d shaft currents.
Description
Technical field
The present invention relates to the field weakening control method and dress in permagnetic synchronous motor field, more particularly to a kind of permagnetic synchronous motor
Put.
Background technology
The vector control technology of permagnetic synchronous motor can make permagnetic synchronous motor obtain good transient response spy because of it
Property, realize to load disturbance and the quick response of given value changes, and be used widely.In the vector control of permagnetic synchronous motor
During system, when traction invertor is supplied to the voltage of permagnetic synchronous motor to reach maximum, by reducing permanent magnet synchronous electric
The magnetic field (carrying out weak magnetic control to permagnetic synchronous motor) of machine can reduce the back-emf of permagnetic synchronous motor, turn so as to raise
The rotating speed of son.
At present, d axles (i.e. d-axis) electric current can be made to be less than 0 by certain method, so as to reduce using its demagnetizing effect
The magnetic field of permagnetic synchronous motor, and then realize weak magnetic control.In the prior art, it can be less than d shaft currents by following methods
0：Calculated using d shaft voltage Vdr and q shaft voltages Vqr and obtain neutral phase voltage Vr；Vr is compared with reference voltage Vbase, most
Negative Idr (i.e. d shaft currents) is obtained by negative-feedback PI (Proportional Integral, proportional integration) regulations eventually.This method
Realize that block diagram is as shown in Figure 1.
Weak magnetic control is realized because such scheme is adjusted by PI, and PI regulations can bring following problem：PI parameter testings
Time is long；Integration saturation is easily produced, causes poor system performance.
The content of the invention
The embodiment of the present invention provides a kind of method and a device for controlling weak magnetism of permagnetic synchronous motor, to shorten during debugging
Between, and improve systematic function.
To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：
First aspect there is provided a kind of field weakening control method of permagnetic synchronous motor, including：
The first regulated value of d shaft currents is obtained according to the actual value of DC bus-bar voltage；
The second regulated value of d shaft currents is obtained according to the actual value of the index parameter of rotor；The index parameter include with
Under it is any：Frequency, angular frequency, rotating speed；
According to first regulated value and second regulated value, the regulated value of d shaft currents is obtained；
According to the initial set-point of d shaft currents and the regulated value of the d shaft currents, the desired value of d shaft currents is obtained；Wherein,
The desired value of the d shaft currents is negative value；
The permagnetic synchronous motor operation is controlled according to the desired value of the d shaft currents.
It is described according to first regulated value and described with reference in a first aspect, in the first possible implementation
Two regulated values, obtain the regulated value of d shaft currents, including：
First regulated value is multiplied with second regulated value, the regulated value of d shaft currents is obtained.
With reference to the first possible implementation of first aspect, in second of possible implementation, the basis
The actual value of DC bus-bar voltage obtains the first regulated value of d shaft currents, including：
The first of d shaft currents is obtained according to the load characteristic of the permagnetic synchronous motor and the actual value of DC bus-bar voltage
Regulated value.
, may at the third with reference to the first possible implementation or second of possible implementation of first aspect
Implementation in, the actual value of the DC bus-bar voltage and first regulated value are linear；And/or, it is described to refer to
The actual value and second regulated value for marking parameter are linear.
It is described by institute in the 4th kind of possible implementation with reference to the first possible implementation of first aspect
State the first regulated value to be multiplied with second regulated value, obtain the regulated value of d shaft currents, including：
First regulated value is multiplied with second regulated value, intermediate regulations value is obtained；
The intermediate regulations value is carried out after amplitude limit, the regulated value of d shaft currents is obtained.
Second aspect there is provided a kind of weak magnetic control device of permagnetic synchronous motor, including：
First regulated value acquiring unit, the first regulation for obtaining d shaft currents according to the actual value of DC bus-bar voltage
Value；
Second regulated value acquiring unit, the actual value for the index parameter according to rotor obtains the second tune of d shaft currents
Section value；The index parameter includes following any：Frequency, angular frequency, rotating speed；
The regulated value acquiring unit of d shaft currents, for according to first regulated value and second regulated value, obtaining d
The regulated value of shaft current；
The desired value acquiring unit of d shaft currents, for the regulation according to the initial set-point of d shaft currents and the d shaft currents
Value, obtains the desired value of d shaft currents；Wherein, the desired value of the d shaft currents is negative value；
Control unit, for controlling the permagnetic synchronous motor to run according to the desired value of the d shaft currents.
With reference to second aspect, in the first possible implementation, the regulated value acquiring unit of the d shaft currents is specific
For first regulated value to be multiplied with second regulated value, the regulated value of d shaft currents is obtained.
With reference to the first possible implementation of second aspect, in second of possible implementation, described first
Regulated value acquiring unit according to the actual value of the load characteristic of the permagnetic synchronous motor and DC bus-bar voltage specifically for obtaining
Obtain the first regulated value of d shaft currents.
, may at the third with reference to the first possible implementation or second of possible implementation of second aspect
Implementation in, the actual value of the DC bus-bar voltage and first regulated value are linear；And/or, it is described to refer to
The actual value and second regulated value for marking parameter are linear.
With reference to the first possible implementation of second aspect, in the 4th kind of possible implementation, the d axles electricity
The regulated value acquiring unit of stream specifically for：
First regulated value is multiplied with second regulated value, intermediate regulations value is obtained；
The intermediate regulations value is carried out after amplitude limit, the regulated value of d shaft currents is obtained.
This programme by obtain respectively DC bus-bar voltage and rotor index parameter actual value to the shadows of d shaft currents
Ring, obtain the first regulated value and the second regulated value；It is the d shaft currents of negative value according to the first regulated value and the acquisition of the second regulated value
Desired value, permagnetic synchronous motor operation is controlled according to the desired value of d shaft currents.Compared with prior art, this programme need not be adopted
Adjusted with PI, therefore, it is possible to shorten debug time, and the systematic function caused by PI regulations are also easy to produce integration saturation can be prevented
Poor the problem of.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 realizes block diagram for a kind of field weakening control method of permagnetic synchronous motor of the prior art；
Fig. 2 is a kind of schematic flow sheet of the field weakening control method for permagnetic synchronous motor that the embodiment of the present invention one is provided；
Fig. 3 is a kind of schematic flow sheet of the field weakening control method for permagnetic synchronous motor that the embodiment of the present invention two is provided；
Fig. 4 realizes block diagram for a kind of field weakening control method of permagnetic synchronous motor of the offer of the embodiment of the present invention two；
Fig. 5 realizes block diagram for the field weakening control method of another permagnetic synchronous motor of the offer of the embodiment of the present invention two；
Fig. 6 is a kind of structural representation of the weak magnetic control device for permagnetic synchronous motor that the embodiment of the present invention three is provided；
Fig. 7 is a kind of structural representation of the weak magnetic control device for permagnetic synchronous motor that the embodiment of the present invention four is provided.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
It should be noted that the terms "and/or", only a kind of incidence relation for describing affiliated partner, is represented
There may be three kinds of relations, for example, A and/or B, can be represented：Individualism A, while there is A and B, individualism B these three
Situation.
Embodiment one
As shown in Fig. 2 be a kind of field weakening control method of permagnetic synchronous motor provided in an embodiment of the present invention, including：
201：The first regulated value of d shaft currents is obtained according to the actual value of DC bus-bar voltage.
Exemplary, " permagnetic synchronous motor " in the embodiment of the present invention can apply in plurality of devices, and the equipment can
Think direct current compressor etc..The executive agent of the embodiment of the present invention can be controller, and the controller can be permanent magnet synchronous electric
The control unit in equipment where machine, or independently of the entity of the equipment where permagnetic synchronous motor
" DC bus-bar voltage " refers to the DC bus-bar voltage of traction invertor.When implementing, this method can also be wrapped
Include：Obtain the actual value of DC bus-bar voltage；It can specifically be realized using method of the prior art.
In order to illustrate influence of the DC bus-bar voltage to d shaft currents, following formula 1 and formula 2 are illustrated first：
Formula 1：Wherein, udIt is the electricity that traction invertor is supplied to permagnetic synchronous motor
Vector is pressed in the projection of d axles, uqIt is that traction invertor is supplied to the voltage vector of permagnetic synchronous motor in the throwing of q axles (quadrature axis)
Shadow, ψdIt is the magnetic linkage of rotor (permanent magnet) in the projection of d axles, ψqIt is projection of the magnetic linkage in q axles, LdIt is d axle inductances, LqIt is q axles
Inductance, ω is the actual angular frequency of rotor, R1For stator resistance, idIt is the d shaft currents under rotor coordinate, iqUnder being rotor coordinate
Q shaft currents.
Formula 2：Wherein, ψfIt is the magnetic linkage of rotor.
Due to permagnetic synchronous motor carry out weak magnetic control when, permagnetic synchronous motor be typically in high frequency operation when, this
When negligible stator resistance pressure drop, therefore formula 3 can be obtained according to formula 1 and formula 2：Wherein, U is that traction invertor is supplied to permanent magnetism same
Walk the amplitude of the voltage vector of motor.Formula 4 can be obtained by formula 3：Due to forever
During magnetic-synchro motor carries out weak magnetic control, DC bus-bar voltage UdcIt is equal with U, therefore formula 5 can be obtained：
It can be seen from formula 5, i is influenceeddParameter include：Udc、ω、iq、Ld、LqAnd ψf.Usually, UdcWith ω to id's
Influence is larger.Because when carrying out weak magnetic control to permagnetic synchronous motor, d shaft currents are negative value；Therefore, it can be seen from formula 5,
When ω is constant, idAbsolute value with UdcIncrease and reduce, that is to say, that UdcWith idAbsolute value be inversely proportional, UdcWith id
Be directly proportional；Work as UdcWhen constant, idAbsolute value increase with ω increase, that is to say, that ω and idAbsolute value into just
Than ω and idBe inversely proportional.In the embodiment of the present invention, by UdcTo idInfluence with " the first regulated value of d shaft currents " represent, will
ω is to idInfluence with " the second regulated value of d shaft currents " represent.
Optionally, step 201 can include：According to the load characteristic of the permagnetic synchronous motor and dc bus electricity
The actual value of pressure obtains the first regulated value of d shaft currents.Exemplary, when permagnetic synchronous motor is applied in a certain equipment,
The load characteristic of the permagnetic synchronous motor can be the load characteristic of the equipment, for example, when the equipment is compressor, this is optional
Mode can be：The first of d shaft currents is obtained according to the load characteristic of compressor and the actual value of the DC bus-bar voltage
Regulated value.
202：The second regulated value of d shaft currents is obtained according to the actual value of the index parameter of rotor；The index parameter bag
Include following any：Frequency, angular frequency, rotating speed.
Exemplary, when implementing, this method can also include：The actual value of the indication index parameter of rotor is determined,
It can specifically be realized using method of the prior art.It should be noted that between the frequency f of rotor, angular frequency and rotating speed n
Meet following relation：ω=2 π f, n=60f/p, wherein, p refers to the number of pole-pairs of permagnetic synchronous motor rotating excitation field.
Optionally, in order to reduce the amount of calculation of field weakening control method, the actual value of the DC bus-bar voltage and described the
Relation between one regulated value can be linear relationship；And/or, the actual value of the index parameter and second regulated value it
Between relation can be linear relationship.
203：According to first regulated value and second regulated value, the regulated value of d shaft currents is obtained.
Optionally, step 203 can be implemented as：First regulated value is multiplied with second regulated value, d axles are obtained
The regulated value of electric current.Furthermore it is also possible to be embodied as：First regulated value, second regulated value are multiplied with -1, d is obtained
The regulated value of shaft current.
Optionally, step 203 can be implemented as：First regulated value is multiplied with second regulated value, in obtaining
Between regulated value；The intermediate regulations value is carried out after amplitude limit, the regulated value of d shaft currents is obtained.
204：According to the initial set-point of d shaft currents and the regulated value of the d shaft currents, the desired value of d shaft currents is obtained；
Wherein, the desired value of the d shaft currents is negative value.
Exemplary, the initial set-point of d shaft currents is 0.When the regulated value of d shaft currents is negative value, step 204 is specific
Can be：The initial set-point of d shaft currents is added with the regulated value of d shaft currents, the desired value of d shaft currents is obtained；When d axles electricity
The regulated value of stream be on the occasion of when, step 204 is specifically as follows：By the initial set-point of d shaft currents and the regulated value phase of d shaft currents
Subtract, obtain the desired value of d shaft currents.
205：The permagnetic synchronous motor operation is controlled according to the desired value of the d shaft currents.
Exemplary, the concrete methods of realizing of step 205 can be the vector controlled of permagnetic synchronous motor in the prior art
Method.
The field weakening control method of permagnetic synchronous motor provided in an embodiment of the present invention, by obtaining DC bus-bar voltage respectively
Influence with the actual value of the index parameter of rotor to d shaft currents, obtains the first regulated value and the second regulated value；Adjusted according to first
Section value and the second regulated value obtain the desired value of the d shaft currents for negative value, and permanent magnet synchronous electric is controlled according to the desired value of d shaft currents
Machine is run.Compared with prior art, this programme therefore, it is possible to shorten debug time, and need not can be prevented using PI regulations
The problem of systematic function is poor caused by PI regulations are also easy to produce integration saturation.
Embodiment two
In the present embodiment, permagnetic synchronous motor is applied in compressor." index parameter " in embodiment one is in this implementation
It is in example：Rotating speed.As shown in figure 3, the field weakening control method for the permagnetic synchronous motor that the present embodiment is provided, including：
301：Controller judges whether to need to carry out weak magnetic control to permagnetic synchronous motor.
If it is not, then performing step 302；If so, then performing step 303.
Exemplary, controller can determine to need to carry out weak magnetic control to permagnetic synchronous motor under the instruction of user；
Can also be when detecting the output voltage of traction invertor for maximum voltage, it is determined that needing to carry out weak magnetic to permagnetic synchronous motor
Control.
302：Using the initial set-point of d shaft currents as d shaft currents desired value；Wherein, the initial set-point of d shaft currents
For 0.
Perform after step 302, perform step 308.
303：Determine the actual value of the actual value of DC bus-bar voltage and the rotating speed of rotor.
Exemplary, when implementing, the estimated value of DC bus-bar voltage can be sent to by CPU with conditioned circuit
AD (Analog to Digital, the analog-to-digital conversion) analog sampling of (Central Processing Unit, central processing unit)
Mouthful, then the estimated value of DC bus-bar voltage is scaled to by CPU software the actual value of DC bus-bar voltage.Furthermore it is possible to logical
Cross the actual value that rotor flux estimator obtains the rotating speed of rotor.
304：The first regulation of d shaft currents is obtained according to the load characteristic of compressor and the actual value of DC bus-bar voltage
Value, wherein, the actual value of DC bus-bar voltage and the first regulated value are linear.
Exemplary, the load characteristic of compressor is：When the running speed of compressor is higher, loading moment is bigger.First
Regulated value is negative value.It can be seen from embodiment one, the absolute value of DC bus-bar voltage and the first regulated value is inversely proportional.
305：The second regulated value of d shaft currents is obtained according to the actual value of rotating speed, wherein, the actual value of the angular frequency of rotor
It is linear with the second regulation.
Exemplary, the second regulated value is negative value.It can be seen from embodiment one, the absolute value of rotating speed and the second regulated value into
Direct ratio.
306：First regulated value and the second regulated value are multiplied, the regulated value of d shaft currents is obtained.
307：The initial set-point and the regulated value of d shaft currents of d shaft currents are subtracted each other, the desired value of d shaft currents is obtained.
It should be noted that when implementing, the action of amplitude limit can be performed within step 306, can also be in step 307
The middle action for performing amplitude limit.Specifically, step 306 can include：First regulated value is multiplied with the second regulated value, centre is obtained
Regulated value；Intermediate regulations value is carried out after amplitude limit, the regulated value of d shaft currents is obtained.Or, step 307 can include：By d axles
The initial set-point and the regulated value of d shaft currents of electric current subtract each other, and obtain intermediate objective value；Intermediate objective value is carried out after amplitude limit,
Obtain the desired value of d shaft currents.
Exemplary, step 303-307 process is referred to as weak magnetic control process, as shown in figure 4, being weak magnetic control process
One kind realize block diagram.Wherein, the initial set-point of d shaft currents is id*, the regulated value of d shaft currents is △ id, the mesh of d shaft currents
Scale value is idref, the first regulated value is △ id_ 1, the second regulated value is △ id_ 2, the actual value of DC bus-bar voltage is Udc, angular frequency
The actual value of rate is ω.In addition, in the Fig. 4, being illustrated so that step 307 includes " amplitude limit " action as an example.Wherein, middle mesh
Scale value is。
308：Permagnetic synchronous motor operation is controlled according to the desired value of d shaft currents.
Perform after step 308, then terminate.
Exemplary, step 308 implements process as shown in figure 5, can specifically include：
1), using stator side U, V the biphase current Ia and Ib of current sensor sampling permagnetic synchronous motor, by clark
Conversion and park obtain the reality of the q shaft currents under the actual value Id and rotor coordinate of the d shaft currents under rotor coordinate after converting
Value Iq；Through rotor flux observer, the actual value ω of angular frequency and the space angle θ of rotor field are obtained；
2), by the actual value ω of angular frequency and the desired value ω of angular frequencyrefIt is compared, comparison signal carries out PI regulations
Afterwards, the desired value i of q shaft currents is obtainedqref；
3), by d shaft current desired values idrefIt is compared, compares with the actual value Id of the d shaft currents under rotor reference axis
Signal obtains d axle output voltages Ud after carrying out PI regulations；Q shaft current desired values iqrefWith the q shaft currents under rotor coordinate
Actual value Iq is compared, and comparison signal obtains q axle output voltages Uq after carrying out PI regulations；
4), according to the space angle θ of rotor field, park inversions are carried out to d axle output voltage Ud and q axle output voltages Uq
Change, after SVPWM (Space Vector Pulse Width Modulation, space vector pulse width modulation), export six tunnels
PWM (Pulse Width Modulation, pulse width modulation) waveform；Utilize six road PWM waveform control IGBT
(Insulated Gate Bipolar Transistor's, insulated gate bipolar transistor) opens shut-off, so as to drive permanent magnetism
Synchronous motor is run.
The field weakening control method of permagnetic synchronous motor provided in an embodiment of the present invention, by obtaining DC bus-bar voltage respectively
Influence with the actual value of the index parameter of rotor to d shaft currents, obtains the first regulated value and the second regulated value；Adjusted according to first
Section value and the second regulated value obtain the desired value of the d shaft currents for negative value, and permanent magnet synchronous electric is controlled according to the desired value of d shaft currents
Machine is run.Compared with prior art, this programme therefore, it is possible to shorten debug time, and need not can be prevented using PI regulations
The problem of systematic function is poor caused by PI regulations are also easy to produce integration saturation.
Embodiment three
As shown in fig. 6, being a kind of weak magnetic control device 6 of permagnetic synchronous motor provided in an embodiment of the present invention, to hold
The field weakening control method of permagnetic synchronous motor shown in row Fig. 2, the device 6 includes：
First regulated value acquiring unit 61, is adjusted for obtaining the first of d shaft currents according to the actual value of DC bus-bar voltage
Section value；
Second regulated value acquiring unit 62, the actual value for the index parameter according to rotor obtains the second of d shaft currents
Regulated value；The index parameter includes following any：Frequency, angular frequency, rotating speed；
The regulated value acquiring unit 63 of d shaft currents, for according to first regulated value and second regulated value, obtaining
The regulated value of d shaft currents；
The desired value acquiring unit 64 of d shaft currents, for the tune according to the initial set-point of d shaft currents and the d shaft currents
Section value, obtains the desired value of d shaft currents；Wherein, the desired value of the d shaft currents is negative value；
Control unit 65, for controlling the permagnetic synchronous motor to run according to the desired value of the d shaft currents.
Optionally, the regulated value acquiring unit 63 of the d shaft currents is specifically for by first regulated value and described the
Two regulated values are multiplied, and obtain the regulated value of d shaft currents.
Optionally, the first regulated value acquiring unit 61 is specifically for special according to the load of the permagnetic synchronous motor
Property and DC bus-bar voltage actual value obtain d shaft currents the first regulated value.
Optionally, the actual value of the DC bus-bar voltage and first regulated value are linear；And/or, it is described
The actual value of index parameter and second regulated value are linear.
Optionally, the regulated value acquiring unit 63 of the d shaft currents specifically for：
First regulated value is multiplied with second regulated value, intermediate regulations value is obtained；
The intermediate regulations value is carried out after amplitude limit, the regulated value of d shaft currents is obtained.
The weak magnetic control device of permagnetic synchronous motor provided in an embodiment of the present invention, by obtaining DC bus-bar voltage respectively
Influence with the actual value of the index parameter of rotor to d shaft currents, obtains the first regulated value and the second regulated value；Adjusted according to first
Section value and the second regulated value obtain the desired value of the d shaft currents for negative value, and permanent magnet synchronous electric is controlled according to the desired value of d shaft currents
Machine is run.Compared with prior art, this programme therefore, it is possible to shorten debug time, and need not can be prevented using PI regulations
The problem of systematic function is poor caused by PI regulations are also easy to produce integration saturation.
Example IV
As shown in fig. 7, being a kind of weak magnetic control device 7 of permagnetic synchronous motor provided in an embodiment of the present invention, to hold
The field weakening control method of permagnetic synchronous motor shown in row Fig. 2, the device 7 includes：Memory 71 and processor 72, wherein,
Memory 71 is used to store one group of code, and the code performs following action for control processor 72：
The first regulated value of d shaft currents is obtained according to the actual value of DC bus-bar voltage；
The second regulated value of d shaft currents is obtained according to the actual value of the index parameter of rotor；The index parameter include with
Under it is any：Frequency, angular frequency, rotating speed；
According to first regulated value and second regulated value, the regulated value of d shaft currents is obtained；
According to the initial set-point of d shaft currents and the regulated value of the d shaft currents, the desired value of d shaft currents is obtained；Wherein,
The desired value of the d shaft currents is negative value；
The permagnetic synchronous motor operation is controlled according to the desired value of the d shaft currents.
Optionally, first regulated value specifically for being multiplied, obtaining by the processor 72 with second regulated value
The regulated value of d shaft currents.
Optionally, the processor 72 is specifically for according to the load characteristic and dc bus of the permagnetic synchronous motor
The actual value of voltage obtains the first regulated value of d shaft currents.
Optionally, the actual value of the DC bus-bar voltage and first regulated value are linear；And/or, it is described
The actual value of index parameter and second regulated value are linear.
Optionally, the processor 72 specifically for：
First regulated value is multiplied with second regulated value, intermediate regulations value is obtained；
The intermediate regulations value is carried out after amplitude limit, the regulated value of d shaft currents is obtained.
The weak magnetic control device of permagnetic synchronous motor provided in an embodiment of the present invention, by obtaining DC bus-bar voltage respectively
Influence with the actual value of the index parameter of rotor to d shaft currents, obtains the first regulated value and the second regulated value；Adjusted according to first
Section value and the second regulated value obtain the desired value of the d shaft currents for negative value, and permanent magnet synchronous electric is controlled according to the desired value of d shaft currents
Machine is run.Compared with prior art, this programme therefore, it is possible to shorten debug time, and need not can be prevented using PI regulations
The problem of systematic function is poor caused by PI regulations are also easy to produce integration saturation.
It is apparent to those skilled in the art that, for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, may be referred to the corresponding process in preceding method embodiment, will not be repeated here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematical, for example, the unit
Divide, only a kind of division of logic function there can be other dividing mode when actually realizing, such as multiple units or component
Another system can be combined or be desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or
The coupling each other discussed or direct-coupling or communication connection can be the indirect couplings of device or unit by some interfaces
Close or communicate to connect, can be electrical, machinery or other forms.
The unit illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, can also
That the independent physics of unit includes, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, it would however also be possible to employ hardware adds the form of SFU software functional unit to realize.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in an embodied on computer readable and deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are to cause a computer
Equipment (can be personal computer, server, or network equipment etc.) performs the portion of each embodiment methods described of the invention
Step by step.And foregoing storage medium includes：USB flash disk, mobile hard disk, ROM (Read-Only Memory, read-only storage), RAM
(Random Access Memory, random access memory), magnetic disc or CD etc. are various can be with Jie of store program codes
Matter.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (10)
1. a kind of field weakening control method of permagnetic synchronous motor, it is characterised in that including：
The first regulated value of d shaft currents is obtained according to the actual value of DC bus-bar voltage；
The second regulated value of d shaft currents is obtained according to the actual value of the index parameter of rotor；The index parameter includes following
It is a kind of：Frequency, angular frequency, rotating speed；
According to first regulated value and second regulated value, the regulated value of d shaft currents is obtained；
According to the initial set-point of d shaft currents and the regulated value of the d shaft currents, the desired value of d shaft currents is obtained；Wherein, the d
The desired value of shaft current is negative value；
The permagnetic synchronous motor operation is controlled according to the desired value of the d shaft currents.
2. according to the method described in claim 1, it is characterised in that described to be adjusted according to first regulated value with described second
Value, obtains the regulated value of d shaft currents, including：
First regulated value is multiplied with second regulated value, the regulated value of d shaft currents is obtained.
3. method according to claim 2, it is characterised in that described that d axles are obtained according to the actual value of DC bus-bar voltage
First regulated value of electric current, including：
The first regulation of d shaft currents is obtained according to the load characteristic of the permagnetic synchronous motor and the actual value of DC bus-bar voltage
Value.
4. according to the method in claim 2 or 3, it is characterised in that by the actual value of the DC bus-bar voltage with it is described
First regulated value is considered as linear relationship；And/or, the actual value of the index parameter and second regulated value are considered as linear pass
System.
5. method according to claim 2, it is characterised in that described by first regulated value and second regulated value
It is multiplied, obtains the regulated value of d shaft currents, including：
First regulated value is multiplied with second regulated value, intermediate regulations value is obtained；
The intermediate regulations value is carried out after amplitude limit, the regulated value of d shaft currents is obtained.
6. a kind of weak magnetic control device of permagnetic synchronous motor, it is characterised in that including：
First regulated value acquiring unit, the first regulated value for obtaining d shaft currents according to the actual value of DC bus-bar voltage；
Second regulated value acquiring unit, the actual value for the index parameter according to rotor obtains the second regulated value of d shaft currents；
The index parameter includes following any：Frequency, angular frequency, rotating speed；
The regulated value acquiring unit of d shaft currents, for according to first regulated value and second regulated value, obtaining d axles electricity
The regulated value of stream；
The desired value acquiring unit of d shaft currents, for the regulated value according to the initial set-point of d shaft currents and the d shaft currents, is obtained
Obtain the desired value of d shaft currents；Wherein, the desired value of the d shaft currents is negative value；
Control unit, for controlling the permagnetic synchronous motor to run according to the desired value of the d shaft currents.
7. device according to claim 6, it is characterised in that the regulated value acquiring unit of the d shaft currents specifically for,
First regulated value is multiplied with second regulated value, the regulated value of d shaft currents is obtained.
8. device according to claim 7, it is characterised in that the first regulated value acquiring unit specifically for, according to
The load characteristic of the permagnetic synchronous motor and the actual value of DC bus-bar voltage obtain the first regulated value of d shaft currents.
9. the device according to claim 7 or 8, it is characterised in that by the actual value of the DC bus-bar voltage with it is described
First regulated value is considered as linear relationship；And/or, the actual value of the index parameter and second regulated value are considered as linear pass
System.
10. device according to claim 7, it is characterised in that the regulated value acquiring unit of the d shaft currents is specifically used
In：
First regulated value is multiplied with second regulated value, intermediate regulations value is obtained；
The intermediate regulations value is carried out after amplitude limit, the regulated value of d shaft currents is obtained.
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| CN106452244A (en) * | 2016-10-27 | 2017-02-22 | 江苏大学 | Maximum torque output linear field weakening control method and system of embedded permanent magnet synchronous motor |
| CN107086544B (en) * | 2017-05-10 | 2019-03-08 | 广东美的暖通设备有限公司 | Overvoltage crowbar, three-phase drive motor and air conditioner |
| CN107979320B (en) * | 2017-12-30 | 2020-06-02 | 易事特集团股份有限公司 | Brushless double-fed motor rotation speed measuring method and system |
| CN112910232B (en) * | 2021-03-19 | 2022-04-19 | 青岛海信日立空调***有限公司 | Air conditioning system |
| CN114647270A (en) * | 2022-03-31 | 2022-06-21 | 广东海悟科技有限公司 | Method and device for controlling bus voltage of fan, storage medium and electronic device |
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