CN104639007B - A kind of control method of many rated operation point rare-earth permanent-magnet electric machines - Google Patents
A kind of control method of many rated operation point rare-earth permanent-magnet electric machines Download PDFInfo
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Abstract
A kind of many rated operation point rare-earth permanent-magnet electric machines and its control, including rare-earth permanent-magnet electric machine and control method, described rare-earth permanent-magnet electric machine and control method, described rare-earth permanent-magnet electric machine is the winding that two or more independence is set with a stator, described independent terminals, described independent winding has the independent rated operation point of its correspondence, described independent rated operation point has its independent motor work output performance data, described frequency-changing control system for the independent mathematical modulo template of multigroup correspondence of more than 2 and single CPU control chips combination, switch operating controls same motor respectively.
Description
Technical field
The present invention relates to a kind of rare-earth permanent-magnet electric machine of many rated operation points and its control method.
Background technology
China's rare earth material enriches, and accounts for global total amount 50~60%, and the application of rare-earth permanent-magnet electric machine is extensive by Zhejiang, at present
In multiple sector applications, from space flight to civilian in popularization.Particularly above can in the application of pure electric automobile and electro spindle lathe
Have the advantages that larger.At present using VFC driving rare-earth permanent-magnet electric machine work, and then realize that machine-tool will by operating mode
Ask work.In the course of the work must by mathematical modulo template in frequency converter by panel is input to by the electrical parameter of motor
Block, it is established that a rational motor mathematical model.One motor only has a kind of corresponding electrical parameter.One mathematical modeling
Plate can only set up a rational motor mathematical model.And then the sampling component in newly-established mathematical modeling combination frequency converter
（From motor side）Collect Current Voltage value and new Current Voltage value supply motor realization driving is produced after CPU calculation optimizations.
Sampling component, which is combined, from newly-established mathematical modeling gathers current of electric magnitude of voltage to through the new electric current of CPU calculation optimizations output
The process of magnitude of voltage, forms closed-loop current control process.Also encoder can be added in control process and realizes speed closed loop, then
Control accuracy is effectively improved.This control at present drives the application of rare-earth permanent-magnet electric machine for asynchronous machine,
Efficiency, energy-conservation, small volume, usage range can be improved wider, but all had a problem that, either magneto or three
Phase Induction Machines, in the presence of a common working characteristics, more than rated operation point be Constant-power drive, rated operation point with
Lower is permanent torque output.Rare-earth permanent-magnet electric machine also embodies another contradiction, when being worked more than rated operation point, with rotating speed
Raising, counter electromotive force then accordingly improves.When rotating speed reaches it is certain when counter electromotive force be more than power network driving voltage, then rare earth permanent magnet
Motor cisco unity malfunction.Use weak magnetism speed expansion processing at present, with the raising of speed, efficiency understands dramatic decrease, so not only
Have impact on the operating efficiency of motor, and during weak magnetic processing opposing magnetic field increase, it is easy to cause permanent magnet loss of excitation,
Weak magnetic processing simultaneously also can only be in certain scope so that applying working condition is limited.Particular note is that when motor work
During operating mode below rated operation point, motor is constant moment of force output.The efficient work point of motor is typically set in nominal operation
Point, when low speed, when rotating speed is that the work of 1/2 or 1/3 rated operation point is even lower, electric efficiency declines, while voltage declines,
If now moment of torsion increase, corresponding current is increased, motor temperature rises, and has a strong impact on the normal of motor and uses, and actual work
Condition is then often existed for machine tool chief axis driving, and slow-speed of revolution driving requires there is larger driving moment, or even requires to reach
Several times of rated operation point, can only force motor overload to use, and original slow-speed of revolution work there is low-voltage, poor efficiency, radiating
The contradiction that condition is bad, temperature is high, for electric automobile, then requires course of work constant moment of force, starts, raises speed and goes up a slope
When, range request high-torque is crossed, while requiring to want corresponding raising with the increase power of speed.Overload is even more to increase electric current,
It is particularly thorny that temperature rises.Thus above-described Railway Project is existing when current rare-earth permanent-magnet electric machine is used asks
Topic.
The content of the invention
In view of the deficiencies in the prior art, it is an object of the invention to provide a kind of low speed torque of many rated operation points it is big,
Operating rate region is wide, efficiency high rare-earth permanent-magnet electric machine and its control method.
To achieve these goals the technical scheme is that：A kind of control of the rare-earth permanent-magnet electric machine of many rated operation points
Method processed, described rare-earth permanent-magnet electric machine is to be set with more than two independent windings, described independent winding on a stator
There is its independent terminals, described independent winding has its independent rated operation point, described independent rated operation point
There is its independent motor work output performance data, described rare-earth permanent-magnet electric machine uses frequency-changing control system；The control method
Carry out according to the following steps：Step（1）Magneto low speed, middling speed, the independent winding of three groups of combinations of three velocity bands at a high speed
Corresponding rated operation point electrical parameter 1,2,3 passes through three independent mathematical modulos in the input converter of frequency converter wainscot 5 respectively
Template block 6,7,8 independently sets up three rational mathematical modelings；Step（2）Collection component 14 is respectively from electricity in frequency converter
When terminals a, b, the c at machine rated operation point winding connection end 11,12,13 collect motor correspondence rated operation point winding work
Electric current, magnitude of voltage combined mathematical module plate 6,7,8 three correspondence mathematical modeling plates set up reasonable mathematical modelings warp
CPU calculation optimizations export new Current Voltage value and independently corresponding rated operation point winding connection are defeated by through driving plate 10
End 11,12,13；Step（3）Working frequency setting 4 required by a certain operating mode of motor correspondence is defeated by through frequency converter wainscot 5
The Current Voltage value and the frequency of working condition requirement that CPU9 is gathered with reference to newly-established mathematical modulo offset and collection component are defeated
Enter to export new Current Voltage value and operating mode frequency values after value is handled through CPU calculation optimizations right for operating mode work institute through driving plate 10
The rated operation point winding connection end answered, now the normal work of rare-earth permanent-magnet electric machine 15 is in set point work condition state；In step（2）
In, the electrical parameter 1,2,3 corresponding to many rated operation points of rare-earth permanent-magnet electric machine is defeated by mathematical modeling through frequency converter wainscot 5 respectively
Plate 6,7,8, by CPU handle after through driving plate 10 and magneto rated operation point winding connection end 11,12,13 form three groups
It is specified corresponding to independent laterally driven control route, its rated operation point electrical parameter 1 and mathematics mould plate block 6 and motor
Operating point winding connection end 11 is one group；The electrical parameter of rated operation point electrical parameter 2 and mathematics mould plate block 7 and Rated motor work
It is one group to make point winding connection end 12；Rated operation point electrical parameter 3 and mathematics mould plate block 8 and Rated motor operating point winding
Terminals 13 are one group；Three groups of independent, single group work independent for interlocking, another two groups do not work, respectively by synchronism switching member
Part E-X, F-Y, G-Z difference synchronism switching are implemented, E and X, F and Y, G and Z difference synchronism switchings, are interlocking between three, respectively
Interlocking switching in a dynamic state, controls same motor between group.
Further, it is set with the independent winding combination side of multiple correspondences on one stator of described rare-earth permanent-magnet electric machine
Formula, the speed setting method for the different rated operation point work that described independent winding has is each rated operation point phase
Rated speed between mutually is multiple proportion, and the second rated operation point rotating speed is 2 times of the first rated operation point rotating speed, the 3rd volume
The rotating speed for determining operating point is 4 times of the first rated operation point, and each independent winding has the umber of turn of different rated operation points
Establishing method is：Second rated operation point umber of turn is 1/2 times of the first rated operation point, and parallel branch number is the first volume
Determine operating point 2 times, its first rated operation point is low speed point, and the second rated operation point is middling speed point, the 3rd rated operation point
For high speed point, the umber of turn of the 3rd rated operation point is 1/4 times of the first rated operation point number of turn, and parallel branch number is
4 times of one rated operation point, its specific method presses star connection：First rated operation point winding connection end 1,2,3 is external three
Phase lead-out wire terminals, terminals 1 are A phases, and terminals 2 are B phases, and terminals 3 are C phases, and terminals 4,5,6 are simultaneously connected in star
Point, the second rated operation point winding connection method is：Mutually and be A phases, terminals 2,10 are mutually and be B phases, terminals for terminals 1,8
3rd, 12 mutually and for C phases, and mutually and be star midpoint, the 3rd rated operation point winding connection method is terminals 7,4,9,5,11,6：
Terminals 1,8,14,16 mutually and be A phases, terminals 2,10,18,20 mutually and be B phases, terminals 24,22,12,3 mutually and be C phases,
Terminals 13,15,7,4,17,19,9,5,21,23,11,6 mutually and be star midpoint, the rated operation point of delta connection first around
Organizing terminals method is：Mutually and be A phases, mutually and be B phases, terminals 2,4 are mutually and be C phases, second for terminals 3,5 for terminals 1,6
Nominal operation winding connection method is：Terminals 8,1,11,6 mutually and be A phases, terminals 3,12,9,5 mutually and be B phases, terminals 4,
7th, 2,10 mutually and for C phases, and the 3rd nominal operation winding connection method is：Terminals 8,1,16,14,23,21,6,11 are mutually and be A
Phase, mutually and be B phases, terminals 15,13,4,7,18,20,2,10 are mutually and be C phases for terminals 22,24,3,12,9,5,17,19.
Further, described frequency-changing control system is the independent mathematical modulo template of multigroup correspondence of more than 2 and single
CPU control chips combination, respectively switch operating control same motor.
Further, described frequency-changing control system includes：Motor electrical parameter TIP, mathematical modeling plate, CPU controls
Microarray plate processed, driving plate and current of electric voltage signal acquisition component.Described mathematical modeling plate is multigroup independence
, it is to be correspondingly arranged with each nominal operation points corresponding to the multiple independent windings of separate unit rare-earth permanent-magnet electric machine, what it was set up
Mathematical modeling is through frequency converter inner panel input correspondence according to the independent electrical parameter of rare-earth permanent-magnet electric machine rated operation point correspondence
Individually set up, described CPU control chips plate for single plate and distinguishes switch operating, institute with multiple mathematical modeling plates
The driving plate stated is single plate.Described current of electric voltage signal acquisition component is single component.
Further, when described many rated operation point rare-earth permanent-magnet electric machines and frequency-changing control system job control, each number
Learn model plate for interlocking to switch, mathematical modeling plate and motor independent winding synchronism switching, the winding of described motor independence
Between switch to switching at runtime.
Further, switching at runtime and static switching is respectively adopted in the switching of described winding, for machine tool chief axis driving then
Using static state switching, that is, switching is shut down, switching at runtime is then used for electric automobile driving.
Further, when motor is operated in previous rated operation point to latter specified in described switching at runtime handoff procedure
Operating point should be switched over when switching in the rotating speed interval of the 65%~90% of latter rated operation point rotating speed.
Advantages of the present invention：In the introduction, working method and the drive of existing rare-earth permanent-magnet electric machine have been expressly recited
Dynamic control technology, but in the presence of limitation problem is used, for wide working region and speed and moment of torsion when different working conditions changes are big, its
Work validity is severely impacted, and is increased in high velocity due to the raising of the counter electromotive force meeting corresponding speed of magneto,
So that speed is more than 2 times of nominal operation spot speed as an example, now motor works in invariable power, then counter electromotive force is also corresponding 2 times
Increase, is that exemplified by 380V rated operation point counter electromotive force design values are 340V, then Shi Jishiyong speed reaches by line voltage
During 2 times of rated operation point, its counter electromotive force is 680V, and now forward voltage is less than counter electromotive force, system then can not normal work,
Expected expansion speed effect also have to can not be often reached, at a high speed using weak magnetism speed expansion processing, even if employing the measure of weak magnetism speed expansion
Under power output often decline rapidly with the increase of motor speed.Here it is the weak magnetism speed expansion present in permanent magnet motor
Difficult problem.Not only decline electric efficiency, and easily cause permanent magnet loss of excitation.It is dilute with 2000 turns of 40kW rated operation points rotating speed
Exemplified by native magneto, now rated operation point power is 40kW, and rotating speed is 2000 turns, torsion 191Nm, counter electromotive force design
For 340V, rise in rated operation point above rotating speed, torsion correspondence is proportional to be declined.Decline in the following rotating speed of rated operation point,
Then voltage also corresponds to ratio and declined, and now torque is constant, but operating mode low regime has often required that high pulling torque, if moment of torsion is increased,
Electric current rises on year-on-year basis, and corresponding motor temperature also rises, efficiency declines, and heat balance point rising occurs, even results in motor and burn out.So
And specific operation has specific requirement, the driving for machine tool chief axis then requires that low regime will have high pulling torque, or even requires several times
In the moment of torsion of normal revolution point, then require that moment of torsion is small at a high speed, the perseverance during whole speed interval is then required for electric automobile
Moment of torsion, high pulling torque is then required when starting, raise speed, going up a slope, and is increased on year-on-year basis while must being fulfilled for speed and improving correspondence power.These lances
Shield is all the unsolved problem of prior art.The present invention uses the design side of the multiple rated operation points of same rare-earth permanent-magnet electric machine
Method can not only improve operating efficiency, motor can be allowed to be operated in high-efficiency point and high efficiency range, and can have larger working region to fit
Ying Xing, while larger moment of torsion can be obtained low regime under same power condition, and can guarantee that high velocity effectively works, together
When solve the difficult contradiction of permagnetic synchronous motor weak magnetism speed expansion under high speed conditions, it is ensured that high velocity magneto being capable of efficient work
Make.More importantly can be according to different working condition requirements by motor working region progress hierarchical analysis, correspondence designs segment identifier
The service behaviour of domain rated operation point so that motor meet working condition requirement in interval driveability, reach saving material, body
Small, the energy-efficient purpose of product, overcomes the existing method using expanded motor power and wastes the energy to tackle above-mentioned contradiction.
By taking the permagnetic synchronous motor of 40kW-4 grades of 0~6000 rev/min of 380V low-speed regions as an example, analysis is compared, prior art is led to
Normal Rated motor operating point design is at 3000 revs/min（Certainly it can also design at 2500 turns or 3500 revs/min）, now with rated speed
O'clock exemplified by 3000 revs/min, then rated operation point torsion==127.3Nm, rated operation point electric current be 73~
74A, frequency is 100Hz, when operating mode is 150 revs/min, and working frequency is 5Hz, and the voltage for being now defeated by motor is only 20V, is turned round
Square is 127.3Nm, and electric current is 73~74A, but often many requirement of actual working condition high pulling torques, such as pure electric automobile go up a slope,
When starting, raising speed, during lathe slow cutting, often low regime requires more than 2 times rated operation point operation torques, this operating mode torsion
Double, electric current is also corresponded to and doubled, now such as to obtain moment of torsion 127.3*2=254.6N of twice of rated operation point
M, then electric current is 73*2=146A, and then temperature rise rises suddenly motor, and efficiency declines, or even step-out phenomenon occurs, and causes motor quality occur
Problem, have to be using the method for increasing design of electrical motor power.And 150 revs/min of the operating point, 3000 revs/min away from rated operation point phases
Poor 2850 revs/min, speed differs greatly, electric efficiency Ze≤50% now, it is impossible to obtain high operating efficiency.When being operated in height
During 6000 revs/min of fast area, then speed rises, and moment of torsion equal proportion declines, and motor is in invariable power working condition, but actual speed ratio
Rated speed rises 1 times, then counter electromotive force also rises 1 times, is 2 times of rated operation point 340V（680V）, counter electromotive force is big
In forward voltage（680V>380V）, motor then can not normal work, now frequency converter then use weak magnetism speed expansion processing function, then
Decline power of motor, electric efficiency declines, or even causes the generation of permanent magnet magnet loss phenomenon.The technology of the present invention is then using same
The design method of the multiple rated operation points of magneto, or with above-mentioned 40kW-4 grades, contrasted exemplified by 0~6000 rev/min of motor
Illustrate, three rated operation points are set respectively, and low regime rated operation point is 1000 turns, and middling speed area rated operation point rotating speed is
2000 turns, high speed operation area rated operation point rotating speed be 4000 turns, then the major motor parameter of three operating points be presented as moment of torsion=, then tick-over point moment of torsion==382Nm, middling speed area moment of torsion==191Nm is high
Fast area's moment of torsion==95.5Nm, electric current is 73~74A, and counter electromotive force is still designed in 340V, and input voltage is equal
For 380V, thus rotating speed is embodied three rated operation points is interregional more excellent at it between 1000~4000 rotating speed areas
Output services performance, ensure that in low regime can have 382Nm moment of torsion between 0~1000 turn, relative to single specified work
Make point motor same region 127.3Nm contrast, then increase as many as 3 times, at the same operating current be also kept in 73~74A it
Between do not increase, efficiency is relatively also high, because according to the difference of actual state, and the actual phase difference of efficiency is change, is not made herein
It is discussed in detail.In middling speed area, then there is 191Nm torsion, relative to the moment of torsion of single rated operation point motor, then improve 1.5
Times, its electric current is also kept between 73~74A, and counter electromotive force is also accordingly controlled in 340V, and input voltage is 380V, in rotating speed
191Nm torsion can be obtained less than the regional work below 2000 revs/min of rated operation point.In high velocity rated operation point
4000 turns are designed as, then ensure that less than 4000 turns rated speed regional works have 96Nm moment of torsion, this stage mainly considers
Harmful effect of the counter electromotive force caused by controlling and working inside high-speed permanent magnet motor, with 6000 revs/min points of operating mode peak
Analysis, the rotating ratio relative to high velocity rated operation point rotating speed and its peak and rated operation point is 1.5 times, then corresponding anti-
Electromotive force also increases by 1.5 times, for design 340V high speed rated operation point counter electromotive force, then 340*1.5=510V, now instead
Electromotive force 510V is 1.34 times with respect to input voltage 380V, and singly pinpoints and design the counter electromotive force of now operating mode for 680V, then phase
It is also just smaller using the pressure of weak magnetism speed expansion to motor during to VFC, it can effectively ensure the service behaviour of magneto
With efficient output.Designed and analyzed with single rated operation point, in 3000 turns of rated operation point, counter electromotive force 340V, then 6000 turns
680V can be risen to, is then 1.78 times, VFC must just be increased when weak magnetic is handled for input voltage 380V
The difficulty of the weak magnetism speed expansion of d-axis, directly affects the power of this region motor, and also have certain to the service behaviour of permanent magnet
Influence, while weak magnetism speed expansion processing operation interval is also wider, motor is in high speed peak value operating power meeting dramatic decrease, while efficiency
Also decline.The design of single nominal operation and many rated operation points from above-mentioned same 0~6000 turn of magneto of 40kW-4 levels
Job design its situation is contrastingly, it is clear that many rated operation points work solve low regime high pulling torques and high velocity counter electromotive force
Contradiction brings the problem of weak magnetism speed expansion is difficult, while can guarantee that magneto works in high-efficiency point, while can effectively improve forever
The operating efficiency of magneto.And solve the shortcoming embodied when current magneto works under extraordinary operating mode, most critical
Be to solve the brought difficulty and contradiction that worked under the big operating mode of speed torsion change.Particularly how specified pure electric automobile is
The design method of operating point can also meet adaptation and the requirement of the permanent moment of torsion of process, constant with moment of torsion in variant rated operation point
Power corresponds to the raising of rated operation point rotating speed and increased method is set, so that the driving of motor is effectively met, it is full
Sufficient performance of operating condition, reaches energy-conservation, material saving, efficient effect.
The technical program is equally applicable to various three phase variable frequency motor, including switch magnetic group, frequency conversion drive motor.
Brief description of the drawings
Fig. 1 is operation principle block diagram of the embodiment of the present invention.
Fig. 2 is the first rated operation point of star method winding diagram of the present invention.
Fig. 3 is the second rated operation point of star connection winding diagram of the present invention.
Fig. 4 is the rated operation point winding diagram of star connection the 3rd of the present invention.
Fig. 5 is the first rated operation point of delta connection winding diagram of the present invention.
Fig. 6 is the second rated operation point of delta connection winding diagram of the present invention.
Fig. 7 is the rated operation point winding diagram of delta connection the 3rd of the present invention.
Specific embodiment
With reference to embodiment operation principle conceptual scheme, the present invention is further elaborated.
Embodiment operation principle block diagram 1 shows according to the following steps：Step（1）Magneto low speed, at a high speed middling speed, three speed
Rated operation point electrical parameter 1,2,3 corresponding to the independent winding for three groups of combinations for spending region passes through frequency converter wainscot 5 respectively
In input converter, three independent mathematical modeling plates 6,7,8 independently set up three rational motor mathematical models；
Step（2）Collection component 14 in frequency converter respectively from the terminals a of Rated motor operating point winding connection end 11,12,13, b,
Electric current, magnitude of voltage combined mathematical module plate 6 when c points collect motor correspondence rated operation point winding work, 7,8 three it is right
The rational mathematical modeling plate that mathematical modeling plate is set up is answered to export new Current Voltage value through driving through CPU calculation optimizations
Plate 10 is defeated by independently corresponding rated operation point winding connection end 11,12,13；Step（3）The a certain operating mode of motor correspondence
Required working frequency setting 4 is defeated by CPU9 with reference to newly-established mathematical modulo offset and collection member through frequency converter wainscot 5
The Current Voltage value and the frequency input value of working condition requirement that device is gathered export new electric current electricity after being handled through CPU calculation optimizations
Pressure value and operating mode frequency values, work corresponding rated operation point winding connection end through driving plate 10 for operating mode, and now rare earth is forever
The normal work of magneto 15 is in set point situation；In step（2）In, the corresponding electrical parameter of many rated operation points of rare-earth permanent-magnet electric machine
1st, 2,3 be defeated by mathematical modeling plate 6,7,8 through frequency converter wainscot respectively, by CPU handle after through driving plate 10 and magneto
Rated operation point winding connection end 11,12,13 forms the laterally driven control route of three groups of independence, its rated operation point electrical parameter
1 and mathematics mould plate block 6 and motor corresponding to rated operation point winding connection end 11 be one group；The electrical parameter of rated operation point 2
It it is one group with winding connection end 12 corresponding to mathematics mould plate block 7 and Rated motor operating point；The He of rated operation point electrical parameter 3
The corresponding terminals 13 of mathematical modeling plate 8 and the winding of Rated motor operating point 9 institute are one group；This independent three groups are interlocking
It is independent, single group work, another two groups can not work, and interlock synchronism switching respectively by synchronism switching element E-X, F-Y, G-Z respectively
Implement, E and X, F and Y, G and Z difference synchronism switchings, be again interlocking work between three, cut between each group in dynamic situation interlocking
Change, control same motor.
Collection component 14 in embodiment operation principle block diagram 1 is respectively by three independent Rated motor operating points
11st, the Current Voltage value that 12,13 winding connection end a, b, c are gathered is respectively through CPU9 combined mathematical modules plate 6,7,8, and institute is solely
The frequency found newly-established mathematical modeling and set 4 inputs by working frequency is defeated by after CPU9 optimization calculating through driving plate 10
Corresponding rated operation point winding connection end, the process for realizing interlocking work is closed-loop current control process.
Claims (7)
1. a kind of control method of many rated operation point rare-earth permanent-magnet electric machines, it is characterised in that：Described rare-earth permanent-magnet electric machine
The winding of two or more independence is set with one stator, described independent winding has its independent terminals, and described is only
Vertical winding has the independent rated operation point of its correspondence, and described independent rated operation point has its independent motor work output property
Energy data, described rare-earth permanent-magnet electric machine uses frequency-changing control system；The control method is carried out according to the following steps：Step（1）It is dilute
Native magneto low speed, at a high speed middling speed, rated operation point electricity ginseng corresponding to the independent winding of three groups of combinations of three velocity bands
Number (1), (2), (3) respectively by three independent mathematical modeling plates (6) in frequency converter wainscot (5) input converter,
(7), (8) independently set up three rational mathematical modelings；Step（2）Collection component (14) is respectively from motor in frequency converter
Rated operation point winding connection end (11), (12), terminals a, b, the c of (13) collect motor correspondence rated operation point winding work
It is reasonable that electric current, magnitude of voltage combined mathematical module plate (6), (7), (8) three correspondence mathematical modeling plates when making are set up
Mathematical modeling exports new Current Voltage value through CPU calculation optimizations and independently corresponding specified work is defeated by through driving plate (10)
Make point winding connection end (11), (12), (13)；Step（3）Working frequency setting (4) warp required by a certain operating mode of motor correspondence
Frequency converter wainscot (5) is defeated by CPU (9) and combines the Current Voltage value that newly-established mathematical modeling and collection component are gathered
The frequency that new Current Voltage value and working condition requirement are exported after being handled with the frequency input value of working condition requirement through CPU calculation optimizations is defeated
Enter value to work for operating mode through driving plate (10) corresponding rated operation point winding connection end, now rare-earth permanent-magnet electric machine (15) is being just
Often it is operated in set point work condition state；In step（2）In, electrical parameter (1) corresponding to many rated operation points of rare-earth permanent-magnet electric machine,
(2), (3) are defeated by mathematical modeling plate (6), (7), (8) through frequency converter wainscot (5) respectively, by CPU handle after through driving plate
(10) and rare-earth permanent-magnet electric machine rated operation point winding connection end (11), (12), (13) formed three groups of independence laterally driven control
Rated operation point winding corresponding to route processed, its rated operation point electrical parameter (1) and mathematics mould plate block (6) and motor connects
Line end (11) is one group；Rated operation point electrical parameter (2) and mathematics mould plate block (7) and Rated motor operating point winding connection
It is one group to hold (12)；Rated operation point electrical parameter (3) and mathematics mould plate block (8) and Rated motor operating point winding connection end
(13) it is one group；Independent three groups are independent for interlocking, single group work, and another two groups do not work, respectively by synchronism switching element E-X,
F-Y, G-Z difference synchronism switching are implemented, E and X, F and Y, G and Z difference synchronism switchings, are interlocking between three, between each group
Interlocking switching in a dynamic state, controls same motor.
2. a kind of control method of many rated operation point rare-earth permanent-magnet electric machines according to claim 1, it is characterised in that：One
Each rated operation point of multiple independent windings on individual stator has different rotating speeds respectively, and speed setting method is each specified work
It is multiple proportion to make the rated speed of point each other, and the second rated operation point rotating speed is 2 times of the first rated operation point rotating speed,
3rd rated operation point rotating speed is 4 times of the first rated operation point rotating speed, and each independent winding has different rated operation points
Umber of turn establishing method is：Second rated operation point umber of turn is 1/2 times of the first rated operation point, and parallel branch number
It is 2 times of the first rated operation point, its first rated operation point is low speed point, and the second rated operation point is middling speed point, the 3rd volume
Operating point is determined for high speed point, and the umber of turn of the 3rd rated operation point is 1/4 times of the first rated operation point number of turn, and branch in parallel
Way is 4 times of the first rated operation point, and its specific method presses star connection：First rated operation point winding connection end 1,2,3
For external three-phase lead-out wire terminals, terminals 1 are A phases, and terminals 2 are B phases, and terminals 3 are C phases, and terminals 4,5,6 simultaneously connect
For star midpoint, the second rated operation point winding connection method is：Mutually and be A phases, terminals 2,10 are mutually and be B for terminals 1,8
Phase, mutually and be C phases, mutually and be star midpoint, the 3rd rated operation point winding connects terminals 7,4,9,5,11,6 for terminals 3,12
Line method is：Mutually and be A phases, terminals 2,10,18,20 are mutually and be B phases, terminals 24,22,12,3 for terminals 1,8,14,16
Mutually and for C phases, terminals 13,15,7,4,17,19,9,5,21,23,11,6 are mutually and be star midpoint, the volume of delta connection first
Determining operating point winding connection end method is：Mutually and be A phases, mutually and be B phases, terminals 2,4 are mutually simultaneously for terminals 3,5 for terminals 1,6
For C phases, the second rated operation point winding connection method is：Mutually and be A phases, terminals 3,12,9,5 are simultaneously mutually for terminals 8,1,11,6
B phases, mutually and be C phases, the 3rd rated operation point winding connection method is for terminals 4,7,2,10：Terminals 8,1,16,14,23,
21st, 6,11 mutually and for A phases, terminals 22,24,3,12,9,5,17,19 mutually and be B phases, terminals 15,13,4,7,18,20,2,
10 mutually and for C phases.
3. a kind of control method of many rated operation point rare-earth permanent-magnet electric machines according to claim 2, it is characterised in that：Institute
The frequency-changing control system stated is the independent mathematical modeling plate of multigroup correspondence and single CPU control chip plates of more than 2
Combination, respectively switch operating control same motor.
4. a kind of control method of many rated operation point rare-earth permanent-magnet electric machines according to claim 3, it is characterised in that：Institute
The frequency-changing control system stated includes：Frequency converter wainscot, mathematical modeling plate, CPU control chips plate, driving plate and electricity
Electromechanics stream voltage signal acquisition component, described mathematical modeling plate is multigroup independent, is and separate unit rare-earth permanent-magnet electric machine
Nominal operation points are correspondingly arranged corresponding to multiple independent windings, and its mathematical modeling set up is each according to rare-earth permanent-magnet electric machine
The independent electrical parameter of rated operation point correspondence inputs what correspondence was individually set up through frequency converter wainscot, described CPU control chips
Plate is single plate and distinguishes switch operating with multiple mathematical modeling plates, and described driving plate is single plate, collection
The collection component of current of electric voltage signal is single component.
5. a kind of control method of many rated operation point rare-earth permanent-magnet electric machines according to claim 4, it is characterised in that：Institute
Each mathematical modeling plate switches for interlocking when many rated operation point rare-earth permanent-magnet electric machines and frequency-changing control system job control stated,
Mathematical modeling plate and motor independent winding synchronism switching.
6. a kind of control method of many rated operation point rare-earth permanent-magnet electric machines according to claim 5, it is characterised in that：Around
Switching at runtime and static switching is respectively adopted in group switching, for machine tool chief axis driving using static switching, for electric automobile drive
It is dynamic to use switching at runtime.
7. a kind of control method of many rated operation point rare-earth permanent-magnet electric machines according to claim 5, it is characterised in that：From
First rated operation point to the second rated operation point switch when should the second rated operation point rotating speed 65%~90% rotating speed it is interval
Switch over.
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Effective date of registration: 20201217 Address after: No. 14-1, Jinglin Road, Yangtou street, Fu'an City, Ningde City, Fujian Province Patentee after: Fuan Jifa Motor Co.,Ltd. Patentee after: Guo Hui Patentee after: Guo Zigang Address before: 355000 25 Hao garden villa, Yangtou street, Fu'an, Ningde, Fujian Patentee before: Guo Hui Patentee before: Guo Zigang |