CN109889115A - A kind of driving method, system and the device of improved three-phase alternating current generator - Google Patents
A kind of driving method, system and the device of improved three-phase alternating current generator Download PDFInfo
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Abstract
This application discloses driving method, system and the devices of a kind of improved three-phase alternating current generator, comprising: obtains rotor position angle and electric current；Coordinate system transformation is carried out to electric current and obtains exciting current and torque current, and updates excitation voltage and torque voltage, and then obtain driving voltage vector；Judge corresponding three operation modes in work sector where driving voltage vector on vector distribution map, and calculate the working time of each operation mode, to control driving transducer power bridge arm outputting drive voltage vector；Vector distribution map identical, identical work sector of radius including four centers of circle, two of them work sector central angle relatively and are 60 °, other two work sector central angle is opposite and is 120 °.The application generates driving voltage vector with the operation mode of specific four sectors that work, so that the on off sequence of inverter power bridge arm is simplified, can adjust the speed and position in lower switching frequency down coversion, loss reduces, and efficiency and reliability improves.
Description
Technical field
The present invention relates to motor-drive technique field, in particular to a kind of driving method of improved three-phase alternating current generator,
System and device.
Background technique
With the continuous improvement of modern society's productivity, the limitation of direct current generator becomes to be more and more obvious, and alternating current
Machine is because its structure is simple, sturdy and durable, inertia is small, dynamic response is good, high-efficient, economic and reliable, adaptation environment is wide, is easy to tie up
It protects, be easy to the advantages that developing to high-voltage large-capacity, gradually instead of direct current generator, occupy leading position in transmission field, more
To apply the occasion in various power grades more.The control of three phase alternating current motor driving is the pass of three phase alternating current motor application
One of key technology, the design feature of three phase alternating current motor make have very big advantage using vector control system.However it actually answers
In, with the increase of actuator power, all there is certain deficiencies for each control strategy, as switching frequency is high, switching loss
The problems such as big, it has also become restrict a critical issue of high power density driver development.
In general, SVPWM three phase alternating current motor control strategy, uses 8 kinds of switch state Fitted reference voltage vectors.Specific
Under switching frequency, if switching tube characteristic and circuit structure are it has been determined that control strategy directly affects its efficiency, switching frequency is got over
Height, efficiency is higher, thus larger to the loss of switch.
Therefore, how to provide a kind of scheme of solution above-mentioned technical problem is that current those skilled in the art need to solve
Problem.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of driving method of improved three-phase alternating current generator, system and
Device, to realize the efficient control to three phase alternating current motor in the lower situation of switching frequency.Its concrete scheme is as follows:
A kind of driving method of improved three-phase alternating current generator, comprising:
Obtain the current rotor position angle and current flow of three phase alternating current motor；
Current flow is transformed into two-phase rotor coordinate by threephase stator coordinate system by coordinate system transformation, is obtained current
Exciting current and current torque electric current；
Using current exciting current and current torque electric current, excitation voltage and torque voltage are updated；
Using current rotor position angle, current excitation voltage and current torque voltage, present drive voltage vector is obtained；
Judge on vector distribution map, corresponding three operation modes in work sector where present drive voltage vector, and counts
The working time of each operation mode is calculated, to control the working condition of driving transducer power bridge arm, exports current driving
Voltage vector；
Wherein, the vector distribution map includes that four centers of circle are identical, the identical work sector of radius, two of them institute
It states work sector central angle relatively and is 60 °, other two work sector central angle is opposite and is 120 °.
Preferably, on the judgement vector distribution map, corresponding three works in work sector where present drive voltage vector
Before making mode, further includes:
Determine that four work sectors are respectively as follows:
First work sector of the first sector in six sectors of corresponding SVPWM vector distribution map；
Second work sector of the second sector and third sector in six sectors of the corresponding SVPWM vector distribution map；
The third work sector of 4th sector in six sectors of the corresponding SVPWM vector distribution map；
4th work sector of the 5th sector and the 6th sector in six sectors of the corresponding SVPWM vector distribution map；
Corresponding three operation modes in the work sector be respectively the work sector two radius vectors and one zero
Vector.
Preferably, on the judgement vector distribution map, corresponding three works in work sector where present drive voltage vector
Before making mode, further includes:
Determine that four work sectors are respectively as follows:
First work sector of the 6th sector and the first sector in six sectors of corresponding SVPWM vector distribution map；
Second work sector of the second sector in six sectors of the corresponding SVPWM vector distribution map；
The third of third sector and the 4th sector work sector in six sectors of the corresponding SVPWM vector distribution map；
4th work sector of the 5th sector in six sectors of the corresponding SVPWM vector distribution map；
Corresponding three operation modes in the work sector be respectively the work sector two radius vectors and one zero
Vector.
Preferably, on the judgement vector distribution map, corresponding three works in work sector where present drive voltage vector
Before making mode, further includes:
Determine that four work sectors are respectively as follows:
First work sector of the first sector and the second sector in six sectors of corresponding SVPWM vector distribution map；
Second work sector of third sector in six sectors of the corresponding SVPWM vector distribution map；
The third of 4th sector and the 5th sector work sector in six sectors of the corresponding SVPWM vector distribution map；
4th work sector of the 6th sector in six sectors of the corresponding SVPWM vector distribution map；
Corresponding three operation modes in the work sector be respectively the work sector two radius vectors and one zero
Vector.
Preferably, the process of the current rotor position angle for obtaining three phase alternating current motor and current flow, further includes:
Obtain the current angular velocity of the three phase alternating current motor；
Correspondingly, described utilize current exciting current and current torque electric current, before updating excitation voltage and torque voltage,
Further include:
Using current angular velocity and reference angular velocities, current torque electric current is updated；
Using current exciting current and exciting current is referred to, updates current exciting current.
Preferably, it is described utilize current angular velocity and reference angular velocities, update current torque electric current before, further includes:
Using current rotor position angle and reference bit angle setting, current reference angular speed is updated.
Preferably, described that current flow is transformed by threephase stator coordinate system by two-phase rotor coordinate by coordinate system transformation
System, obtains the process of current exciting current and current torque electric current, specifically includes:
It is converted, current flow is converted by threephase stator coordinate system to two-phase stator rectangular coordinate system, then lead to by Clark
Two-phase coordinate system transformation is crossed, current flow is converted by the two-phase stator rectangular coordinate system to two-phase rotor coordinate, is obtained
Current exciting current and current torque electric current.
Correspondingly, the invention also discloses a kind of drive systems of improved three-phase alternating current generator, comprising:
Data acquisition module, for obtaining the current rotor position angle and current flow of three phase alternating current motor；
Current conversion module turns for current flow to be transformed into two-phase by threephase stator coordinate system by coordinate system transformation
Subcoordinate system obtains current exciting current and current torque electric current；
Voltage update module updates excitation voltage and torque electricity for utilizing current exciting current and current torque electric current
Pressure；
Voltage transformation module is worked as utilizing current rotor position angle, current excitation voltage and current torque voltage
Preceding driving voltage vector；
Vector output module, for judging vector distribution map, work sector is corresponding where present drive voltage vector
Three operation modes, and the working time of each operation mode is calculated, to control the work of driving transducer power bridge arm
State exports present drive voltage vector；
Wherein, the vector distribution map includes that four centers of circle are identical, the identical work sector of radius, two of them institute
It states work sector central angle relatively and is 60 °, other two work sector central angle is opposite and is 120 °.
Preferably, the data acquisition module is also used to obtain the current angular velocity of the three phase alternating current motor；
Correspondingly, the drive system further includes electric current update module, for utilizing current angular velocity and reference angular velocities,
Update current torque electric current；Using current exciting current and exciting current is referred to, updates current exciting current.
Correspondingly, the invention also discloses a kind of driving devices of improved three-phase alternating current generator, comprising:
Memory, for storing computer program；
Processor realizes the driving method of three phase alternating current motor as described above when for executing the computer program
Step.
The invention discloses a kind of driving methods of improved three-phase alternating current generator, comprising: obtains three phase alternating current motor
Current rotor position angle and current flow；Current flow two-phase is transformed by threephase stator coordinate system by coordinate system transformation to turn
Subcoordinate system obtains current exciting current and current torque electric current；Using current exciting current and current torque electric current, update is encouraged
Magnetoelectricity pressure and torque voltage；Using current rotor position angle, current excitation voltage and current torque voltage, obtain currently driving electricity
Press vector；Judge on vector distribution map, corresponding three operation modes in work sector where present drive voltage vector, and calculates
The working time of each operation mode exports current driving electricity to control the working condition of driving transducer power bridge arm
Press vector；Wherein, the vector distribution map includes that four centers of circle are identical, the identical work sector of radius, two of them institute
It states work sector central angle relatively and is 60 °, other two work sector central angle is opposite and is 120 °.
By upper, the present invention generates driving voltage vector with the operation mode of specific four sectors that work, since work is fanned
The adjustment in area, so that the on off sequence of inverter power bridge arm is simplified, to carry out frequency control under lower switching frequency
And positioning reduces three phase alternating current motor driving transducer while obtaining with conventional vector control identical steady-state performance
Loss, while saving software development resource, improve the efficiency and reliability of driving transducer.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of step flow chart of the driving method of improved three-phase alternating current generator in the embodiment of the present invention；
Fig. 2 is a kind of vector distribution map in the embodiment of the present invention；
Fig. 3 is another vector distribution map in the embodiment of the present invention；
Fig. 4 is another vector distribution map in the embodiment of the present invention；
Fig. 5 is the waveform diagram of the stator three-phase current of permanent magnet synchronous motor in the embodiment of the present invention；
Fig. 6 is permanent magnet synchronous motor output torque in the embodiment of the present invention；
Fig. 7 is the comparison diagram of the on-off times of two methods in the embodiment of the present invention；
Fig. 8 is a kind of step flow chart of the driving method of specific improved three-phase alternating current generator in the embodiment of the present invention；
Fig. 9 is a kind of system control signal of the driving method of specific improved three-phase alternating current generator in the embodiment of the present invention
Figure；
Figure 10 is a kind of structure distribution figure of the drive system of improved three-phase alternating current generator in the embodiment of the present invention.
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 only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It is shown in Figure 1 the embodiment of the invention discloses a kind of driving method of improved three-phase alternating current generator, comprising:
S11: the current rotor position angle and current flow of three phase alternating current motor are obtained；
Wherein, current flow generally only obtains the biphase current i of three phase alternating current motoraAnd ib, according to Kirchhoff's law ia
+ib+ic=0, the electric current i of third phase can be calculatedc；Rotor position angle θ, that is, the electrical angle of three phase alternating current motor, can lead to
Reading encoder in real time is crossed to obtain.
S12: current flow is transformed by threephase stator coordinate system by two-phase rotor coordinate by coordinate system transformation, is obtained
Current exciting current idWith current torque electric current iq；
S13: current exciting current i is utilizeddWith current torque electric current iq, update excitation voltage VdWith torque voltage Vq；
S14: current rotor angular position theta, current excitation voltage V are utilizeddWith current torque voltage Vq, obtain currently driving electricity
Press vector Vr；
S15: judging on vector distribution map, corresponding three Working moulds in work sector where present drive voltage vector Vr
State, and the working time of each operation mode is calculated, to control the working condition of driving transducer power bridge arm, output is worked as
Preceding driving voltage vector；
Wherein, different from six equal part sectors in the SVPWM vector distribution map of traditional seven segmentations or five-part form, the vector point
Butut includes that four centers of circle are identical, the identical work sector of radius, the sector central angle that works described in two of them it is opposite and
It is 60 °, other two work sector central angle is opposite and is 120 °.
Specifically, corresponding three operation modes in each work sector include Ua、UbAnd U0, wherein Ua、UbFor can be in vector
The vector of Orthogonal Decomposition, U on distribution map0For zero vector, three operation modes corresponding working time is respectively Ta、TbAnd T0, root
U can be obtained according to voltage-second balance principlerTs=UaTa+UbTb+U0T0, and then determine working time Ta、TbAnd T0。
It, can be orthogonal with same principle by driving voltage vector Vr in order to facilitate the working time for calculating each operation mode
It is decomposed into VαAnd Vβ, amplitude isThen following formula is calculated:
T0=Ts-Ta-Tb；
Wherein Vα aAnd Vβ aFor the vector U that worksaOrthogonal Decomposition amount, Vα bAnd Vβ bFor the vector U that worksbOrthogonal Decomposition amount.
Specifically, the distribution of four work sectors can be using the vector distribution map of former SVPWM as base on vector distribution map
Plinth realizes that four work sectors are opposite two-by-two, referring to fig. 2, shown in 3,4, shares three to determine the work sector in the present embodiment
Kind determines method:
In Fig. 2, on the judgement vector distribution map, corresponding three work in work sector where present drive voltage vector
Before mode, further includes:
Determine that four work sectors are respectively as follows:
First work sector of the first sector in six sectors of corresponding SVPWM vector distribution map；
Second work sector of the second sector and third sector in six sectors of the corresponding SVPWM vector distribution map；
The third work sector of 4th sector in six sectors of the corresponding SVPWM vector distribution map；
4th work sector of the 5th sector and the 6th sector in six sectors of the corresponding SVPWM vector distribution map；
Corresponding three operation modes in the work sector be respectively the work sector two radius vectors and one zero
Vector.
In figure first work sector, second work sector, third work sector and the 4th work sector respectively with the sector I,
The sector II, the sector III and the sector IV indicate.
In Fig. 3, on the judgement vector distribution map, corresponding three work in work sector where present drive voltage vector
Before mode, further includes:
Determine that four work sectors are respectively as follows:
First work sector of the 6th sector and the first sector in six sectors of corresponding SVPWM vector distribution map；
Second work sector of the second sector in six sectors of the corresponding SVPWM vector distribution map；
The third of third sector and the 4th sector work sector in six sectors of the corresponding SVPWM vector distribution map；
4th work sector of the 5th sector in six sectors of the corresponding SVPWM vector distribution map；
Corresponding three operation modes in the work sector be respectively the work sector two radius vectors and one zero
Vector.
In figure first work sector, second work sector, third work sector and the 4th work sector respectively with the sector I,
The sector II, the sector III and the sector IV indicate.
In Fig. 4, on the judgement vector distribution map, corresponding three work in work sector where present drive voltage vector
Before mode, further includes:
Determine that four work sectors are respectively as follows:
First work sector of the first sector and the second sector in six sectors of corresponding SVPWM vector distribution map；
Second work sector of third sector in six sectors of the corresponding SVPWM vector distribution map；
The third of 4th sector and the 5th sector work sector in six sectors of the corresponding SVPWM vector distribution map；
4th work sector of the 6th sector in six sectors of the corresponding SVPWM vector distribution map；
Corresponding three operation modes in the work sector be respectively the work sector two radius vectors and one zero
Vector.
In figure first work sector, second work sector, third work sector and the 4th work sector respectively with the sector I,
The sector II, the sector III and the sector IV indicate.
It is understood that specifically judge present drive voltage vector Vr on vector distribution map which work sector when,
According to the method for former SVPWM vector distribution map, is calculated and is judged using following formula:
Wherein, the function of sign (x) is defined as x < 0, sign (x)=0, as x > 0, sign (x)=1；N=3
When driving voltage vector Vr be located at the first sector, driving voltage vector Vr is located at the second sector when N=1, driving voltage when N=5
Vector Vr is located at third sector, and driving voltage vector Vr is located at the 4th sector when N=4, and driving voltage vector Vr is located at when N=6
5th sector, driving voltage vector Vr is located at the 6th sector when N=2.
Work in determining the present embodiment sector and original SVPWM six sectors corresponding relationship after, according to method above
Work sector where can determine as driving voltage vector Vr go the vector distribution map of the present embodiment.
Shown in referring to figs. 5 and 6, Fig. 5 is the wave of practical application of the present invention stator three-phase current in permanent magnet synchronous motor
Shape figure, Fig. 6 are the permanent magnet synchronous motor output torque of practical application of the present invention.It can be seen that driving method of the invention can be in system
Ideal driving effect is obtained in the case where controllable, while guaranteeing the stable state and dynamic property of motor operation.Although Fig. 5,
Fig. 6 is by taking permanent magnet synchronous motor as an example, but since principle of vector control is identical, so the present embodiment is to be suitable for all kinds of three-phase alternating currents
The driving method of motor.
Further, the present embodiment can be applied to the AC motor system of Field orientable control, the driving side of the present embodiment
Method can cooperate speed regulation and/or position control system to realize that detail is under to three phase alternating current motor more precise control
Literary embodiment.
In the prior art, SVPWM is needed by realizing in six different sectors to the switching of six operation modes pair
The drive control of three phase alternating current motor, three phase alternating current motor starts six power switch of wherein three-phase bridge arm in one cycle
Manage each switch 1 time, totally 6 times；It is that three phase alternating current motor driver is steady that driving method in the present embodiment, which uses three operation modes,
Fixed operation, in the case where effect is equally stable, compared with SVPWM control strategy, the circuit mode quantity of the present embodiment use
(operation mode) quantity reduces 1/3, and the on-off times of driving transducer power bridge arm upper switch pipe reduce 11/18, is effectively reduced
Switching frequency and loss.It is shown in Figure 6, using Simulink, SVPWM and the present embodiment are carried out to permanent magnet synchronous motor
Emulation, switching frequency is set as 5kHz, and simulation time 1s, Fig. 7 are specially the comparison of the on-off times of two methods.
The invention discloses a kind of driving methods of improved three-phase alternating current generator, comprising: obtains three phase alternating current motor
Current rotor position angle and current flow；Current flow two-phase is transformed by threephase stator coordinate system by coordinate system transformation to turn
Subcoordinate system obtains current exciting current and current torque electric current；Using current exciting current and current torque electric current, update is encouraged
Magnetoelectricity pressure and torque voltage；Using current rotor position angle, current excitation voltage and current torque voltage, obtain currently driving electricity
Press vector；Judge on vector distribution map, corresponding three operation modes in work sector where present drive voltage vector, and calculates
The working time of each operation mode exports current driving electricity to control the working condition of driving transducer power bridge arm
Press vector；Wherein, the vector distribution map includes that four centers of circle are identical, the identical work sector of radius, two of them institute
It states work sector central angle relatively and is 60 °, other two work sector central angle is opposite and is 120 °.
By upper, the present invention generates driving voltage vector with the operation mode of specific four sectors that work, since work is fanned
The adjustment in area, so that the on off sequence of inverter power bridge arm is simplified, to carry out frequency control under lower switching frequency
And positioning reduces three phase alternating current motor driving transducer while obtaining with conventional vector control identical steady-state performance
Loss, while saving software development resource, improve the efficiency and reliability of driving transducer.
The embodiment of the invention discloses a kind of driving methods of specific improved three-phase alternating current generator, real relative to upper one
Example is applied, the present embodiment has made further instruction and optimization to technical solution.Specifically, it is shown in Figure 8,
S21: the current rotor angular position theta, current flow and current angular velocity ω of three phase alternating current motor are obtained；
S22: being converted by Clark, and current flow is converted by threephase stator coordinate system to two-phase stator rectangular coordinate system,
Again by two-phase coordinate system transformation, current flow is converted by the two-phase stator rectangular coordinate system to two-phase rotor coordinate,
Obtain current exciting current and current torque electric current；
It is understood that the current flow obtained in the step s 21 is ia、ibAnd ic, it is converted by Clark, it will be current
Electric current is converted to the i of two-phase stator rectangular coordinate system by threephase stator coordinate systemαAnd iβ, transformational relation is shown below:
Further, by two-phase coordinate system transformation, by the i of the sub- rectangular coordinate system of two bottomsαAnd iβ, be converted to two-phase rotor
The exciting current i of coordinate systemdWith torque current iq, transformational relation is shown below:
S23: current rotor angular position theta and reference bit angle setting θ are utilized*, update current reference angular velocity omega*；
S24: current angular velocity ω and reference angular velocities ω is utilized*, update current torque electric current iq；Utilize current excitation electricity
Exciting current is flowed and referred to, current exciting current i is updatedd；
S25: current exciting current i is utilizeddWith current torque electric current iq, update excitation voltage VdWith torque voltage Vq；
S26: current rotor angular position theta, current excitation voltage V are utilizeddWith current torque voltage Vq, obtain currently driving electricity
Press vector Vr；
S27: judging on vector distribution map, corresponding three Working moulds in work sector where present drive voltage vector Vr
State, and the working time of each operation mode is calculated, to control the working condition of driving transducer power bridge arm, output is worked as
Preceding driving voltage vector Vr；
Wherein, the vector distribution map includes that four centers of circle are identical, the identical work sector of radius, two of them institute
It states work sector central angle relatively and is 60 °, other two work sector central angle is opposite and is 120 °.
Wherein, the detail of step S27 is implemented identical with step S15 in a upper embodiment, with reference to above, herein
It does not repeat.
It is understood that the step in the present embodiment can be indicated by the system control schematic diagram in Fig. 9, it is seen then that Fig. 9
System control in most important part be electric current conversion electric current loop, speed ring can also be added outside electric current loop, embody step
Feedback control loop relevant to ω in rapid S24, realizes frequency control, outmost turns are using current rotor angular position theta as position feedback
Ring is, it can be achieved that positioning function.
Correspondingly, the embodiment of the invention also discloses a kind of drive systems of improved three-phase alternating current generator, referring to Figure 10
It is shown, comprising:
Data acquisition module 1, for obtaining the current rotor position angle and current flow of three phase alternating current motor；
Current conversion module 2, for current flow to be transformed into two-phase by threephase stator coordinate system by coordinate system transformation
Rotor coordinate obtains current exciting current and current torque electric current；
Voltage update module 3 updates excitation voltage and torque electricity for utilizing current exciting current and current torque electric current
Pressure；
Voltage transformation module 4 is obtained for utilizing current rotor position angle, current excitation voltage and current torque voltage
Present drive voltage vector；
Vector output module 5, for judging vector distribution map, work sector is corresponding where present drive voltage vector
Three operation modes, and the working time of each operation mode is calculated, to control the work of driving transducer power bridge arm
State exports present drive voltage vector；
Wherein, the vector distribution map includes that four centers of circle are identical, the identical work sector of radius, two of them institute
It states work sector central angle relatively and is 60 °, other two work sector central angle is opposite and is 120 °.
In some preferred embodiments, the data acquisition module is also used to obtain the current of the three phase alternating current motor
Angular speed；
Correspondingly, the drive system further includes electric current update module, for utilizing current angular velocity and reference angular velocities,
Update current torque electric current；Using current exciting current and exciting current is referred to, updates current exciting current.
By upper, the present invention generates driving voltage vector with the operation mode of specific four sectors that work, since work is fanned
The adjustment in area, so that the on off sequence of inverter power bridge arm is simplified, to carry out frequency control under lower switching frequency
And positioning reduces three phase alternating current motor driving transducer while obtaining with conventional vector control identical steady-state performance
Loss, while saving software development resource, improve the efficiency and reliability of driving transducer.
Correspondingly, the invention also discloses a kind of driving devices of improved three-phase alternating current generator, comprising:
Memory, for storing computer program；
Processor performs the steps of when for executing the computer program
Obtain the current rotor position angle and current flow of three phase alternating current motor；
Current flow is transformed into two-phase rotor coordinate by threephase stator coordinate system by coordinate system transformation, is obtained current
Exciting current and current torque electric current；
Using current exciting current and current torque electric current, excitation voltage and torque voltage are updated；
Using current rotor position angle, current excitation voltage and current torque voltage, present drive voltage vector is obtained；
Judge on vector distribution map, corresponding three operation modes in work sector where present drive voltage vector, and counts
The working time of each operation mode is calculated, to control the working condition of driving transducer power bridge arm, exports current driving
Voltage vector；
Wherein, the vector distribution map includes that four centers of circle are identical, the identical work sector of radius, two of them institute
It states work sector central angle relatively and is 60 °, other two work sector central angle is opposite and is 120 °.
By upper, the present invention generates driving voltage vector with the operation mode of specific four sectors that work, since work is fanned
The adjustment in area, so that the on off sequence of inverter power bridge arm is simplified, to carry out frequency control under lower switching frequency
And positioning reduces three phase alternating current motor driving transducer while obtaining with conventional vector control identical steady-state performance
Loss, while saving software development resource, improve the efficiency and reliability of driving transducer.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
A kind of driving method, system and the device of improved three-phase alternating current generator provided by the present invention are carried out above
It is discussed in detail, used herein a specific example illustrates the principle and implementation of the invention, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to
According to thought of the invention, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification
It should not be construed as limiting the invention.
Claims (10)
1. a kind of driving method of improved three-phase alternating current generator characterized by comprising
Obtain the current rotor position angle and current flow of three phase alternating current motor；
Current flow is transformed into two-phase rotor coordinate by threephase stator coordinate system by coordinate system transformation, obtains current excitation
Electric current and current torque electric current；
Using current exciting current and current torque electric current, excitation voltage and torque voltage are updated；
Using current rotor position angle, current excitation voltage and current torque voltage, present drive voltage vector is obtained；
Judge on vector distribution map, corresponding three operation modes in work sector where present drive voltage vector, and calculates every
The working time of a operation mode exports present drive voltage to control the working condition of driving transducer power bridge arm
Vector；
Wherein, the vector distribution map includes that four centers of circle are identical, the identical work sector of radius, work described in two of them
Make sector central angle relatively and be 60 °, other two work sector central angle is opposite and is 120 °.
2. driving method according to claim 1, which is characterized in that on the judgement vector distribution map, present drive voltage
Before corresponding three operation modes in work sector where vector, further includes:
Determine that four work sectors are respectively as follows:
First work sector of the first sector in six sectors of corresponding SVPWM vector distribution map；
Second work sector of the second sector and third sector in six sectors of the corresponding SVPWM vector distribution map；
The third work sector of 4th sector in six sectors of the corresponding SVPWM vector distribution map；
4th work sector of the 5th sector and the 6th sector in six sectors of the corresponding SVPWM vector distribution map；
Corresponding three operation modes in the work sector are respectively two radius vectors and a zero vector of the work sector.
3. driving method according to claim 1, which is characterized in that on the judgement vector distribution map, present drive voltage
Before corresponding three operation modes in work sector where vector, further includes:
Determine that four work sectors are respectively as follows:
First work sector of the 6th sector and the first sector in six sectors of corresponding SVPWM vector distribution map；
Second work sector of the second sector in six sectors of the corresponding SVPWM vector distribution map；
The third of third sector and the 4th sector work sector in six sectors of the corresponding SVPWM vector distribution map；
4th work sector of the 5th sector in six sectors of the corresponding SVPWM vector distribution map；
Corresponding three operation modes in the work sector are respectively two radius vectors and a zero vector of the work sector.
4. driving method according to claim 1, which is characterized in that on the judgement vector distribution map, present drive voltage
Before corresponding three operation modes in work sector where vector, further includes:
Determine that four work sectors are respectively as follows:
First work sector of the first sector and the second sector in six sectors of corresponding SVPWM vector distribution map；
Second work sector of third sector in six sectors of the corresponding SVPWM vector distribution map；
The third of 4th sector and the 5th sector work sector in six sectors of the corresponding SVPWM vector distribution map；
4th work sector of the 6th sector in six sectors of the corresponding SVPWM vector distribution map；
Corresponding three operation modes in the work sector are respectively two radius vectors and a zero vector of the work sector.
5. according to claim 1 to any one of 4 driving methods, which is characterized in that
The process of the current rotor position angle for obtaining three phase alternating current motor and current flow, further includes:
Obtain the current angular velocity of the three phase alternating current motor；
Correspondingly, described utilize current exciting current and current torque electric current, before updating excitation voltage and torque voltage, also wrap
It includes:
Using current angular velocity and reference angular velocities, current torque electric current is updated；
Using current exciting current and exciting current is referred to, updates current exciting current.
6. driving method according to claim 5, which is characterized in that it is described using current angular velocity and reference angular velocities, more
Before new current torque electric current, further includes:
Using current rotor position angle and reference bit angle setting, current reference angular speed is updated.
7. driving method according to claim 6, which is characterized in that it is described by coordinate system transformation by current flow by three-phase
Stator coordinate is transformed into two-phase rotor coordinate, obtains the process of current exciting current and current torque electric current, specifically includes:
It is converted by Clark, current flow is converted by threephase stator coordinate system to two-phase stator rectangular coordinate system, then pass through two
Phase coordinate system transformation, current flow is converted by the two-phase stator rectangular coordinate system to two-phase rotor coordinate, is obtained current
Exciting current and current torque electric current.
8. a kind of drive system of improved three-phase alternating current generator characterized by comprising
Data acquisition module, for obtaining the current rotor position angle and current flow of three phase alternating current motor；
Current conversion module is sat for current flow to be transformed into two-phase rotor by threephase stator coordinate system by coordinate system transformation
Mark system, obtains current exciting current and current torque electric current；
Voltage update module updates excitation voltage and torque voltage for utilizing current exciting current and current torque electric current；
Voltage transformation module obtains working as forerunner for utilizing current rotor position angle, current excitation voltage and current torque voltage
Dynamic voltage vector；
Vector output module, for judging vector distribution map, work sector is three corresponding where present drive voltage vector
Operation mode, and the working time of each operation mode is calculated, to control the working condition of driving transducer power bridge arm,
Export present drive voltage vector；
Wherein, the vector distribution map includes that four centers of circle are identical, the identical work sector of radius, work described in two of them
Make sector central angle relatively and be 60 °, other two work sector central angle is opposite and is 120 °.
9. drive system according to claim 8, which is characterized in that the data acquisition module is also used to:
Obtain the current angular velocity of the three phase alternating current motor；
Correspondingly, the drive system further includes electric current update module, it is used for:
Using current angular velocity and reference angular velocities, current torque electric current is updated；
Using current exciting current and exciting current is referred to, updates current exciting current.
10. a kind of driving device of improved three-phase alternating current generator characterized by comprising
Memory, for storing computer program；
Processor, realizing the three phase alternating current motor as described in any one of claim 1 to 7 when for executing the computer program
The step of driving method.
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