永磁同步电动机英文翻译

1、中英文翻译英文原文Research on Voltage Space-vector Con trol System of Syn chro nous MotorVector con trol of field orie nted con trol, the basic idea is: through coord in ate tran sformatio n con trol method for simulatio n of DC motor to con trol the perma nent mag net synchronous motor. Three-phase symmetri

2、cal windings in three-phaseAC can produce a rotating magnetic motive force, two phase symmetrical windings into two symmetric alternating current can produce the same rotating magnet ometive force; therefore the three-phase symmetric winding can be replaced with two phase symmetrical windings equiva

3、le nt in depe ndent of each other, equivale nt prin ciple is the con sta nt mag netomotive force produced before and after tran sformatio n, tran sformatio n and total power con sta nt.In oil field, the power factor was reduced and the reactive power consumption was in creased because of the usage o

4、f the large nu mber of asynchronous motor, and result ing in a huge waste of en ergy, which reduced the in tegrated cost-effective of field. The perma nent magnet synchronous motor possess all the adva ntages of synchronous motor and it has high efficie ncy and higher power factor. For the adva ntag

5、es of perma nent magnet synchrono us,it will bring good energy saving results if it is used in pumping unit. As a result,the study on perma nent magnet synchronous motor con trol system is importa nt.In this paper the theory of vector control system on PMSM is first deeply studied,and the idea of co

6、ord in ate tran sformatio n is used to build the mathematical model of PMSM. An in-depth theoretical analysis of voltage space vector control algorithm is done. Secondly,basedon the mathematical model of permanent magnet synchronous motor and SVPWM theory,the model of PMSM vector control system is e

7、stablished by of Matlab/Simuli nk. The simulati on result shows the possibility of using the con trol system.In the paper, the software and hardware of PMSM vector control system is designed core-based TI Company s motor control DSP chip TMS320LF2407A. Hardware ncludes the main circuit,control circu

8、it and its peripheral circuits;software contains the main program and SVPWM in terrupt subrouti ne,it achieves the impleme ntati on of the dual closed-loop curre nt. At last,the motor experiments are carried on under the laboratory,the experimental results verify the correct ness of the hardware and

9、 con trol program.Permanent magnet synchronous motor with the advantagesof simple structure,high efficiency,wide speed range,widely used in machining,aerospace and electric traction fields,this paper introduces the structure,control strategy of permanent magnet synchronous motor and its vector torqu

10、e con trol research prese nt situati on and directi on.Based on space vector prin ciple,the three ki nd of coord in ate systems as well as the transformation of them which usually used in motor' sspeed control system are in troduced,the n,the mathematic models on differe nt coord in ate systems

11、are derived,be based on that,the principle of traditional direct torque control system as well as the direct torque con trol system based on SVPWM are an alyzed detailed,mea nwhile,the realizati on process of SVPWM algorithm is derived.Finally,the simulation model of convientional DTC Control system

12、 are established in MATLAB/Simuli nk.Con trol of perma nent magnet synchronous motoma in ly in the followi ng1.1 vector con trolThe core idea of vector control of three-phase current,voltage,the flux of the motor by coord in ate tran sformatio n in to the rotor flux orie nted phase refere nee coord

13、in ate system, con trol idea accord ing to DC motor, con trol motor torque.The adva ntages of the fielobrie nted vector control is good torque response,precisespeed control,zero speed can achieve full load.However,the vector con trol system n eeds to determ ine the rotor flux,to coord in ate tran sf

14、ormatio n,a large amount of calculati on ,but also con sider the effect of cha nges in the rotor of the motor parameters,which makes the system more complex,this is the vector control deficie ncies.1.2 direct torque con trolIt is based on stator flux orie ntati on ,impleme ntati on of direct con tro

15、l of stator flux and torque.The con trol is based on the idea of amplitude real-time detect ion of motor torque and flux are given,and the torque and flux linkage value comparison,the torque and flux adjusting the appropriate stator voltage space vector selection table switch calculated directly fro

16、m an offlin e,power switch and con trol of inv erter state.Direct torque con trol does n ot n eed the vector coord in ate tran sformatio n complex,the motor model is simplified, no pulse width modulati on sig nal gen erator,c on trol has the adva ntages of simple structure,motor parameter cha nges,c

17、a n obta in good dyn amic performa nce.But there are also some shortco min gs,such as the inv erter switch ing freque ncy is not fixed,large torque ripple curre nt to realize digital con trol requires high sampli ng freque ncy.1.3 direct torque control based on space vectomodulation (SVM-DTC)The SVM

18、-DTC con trol is the vector con trol and direct torque control together,its theory foun datio n and DTC con trol theory,is based on torque an gle con trol.Accordi ng to the cha nge of torque angle and flux vector position,get the flux of the next cycle position,which can be the refere nee voltage ve

19、ctor is required,the n the refere nee voltage vector modulatio n,PWM wave inv erter driv in g.The SVM-DTC con trol,the flux cha nges to determ ine the n ext positi on,so the accurate estimation of flux has great effect on the control system,and the flux estimation depe nds on motor parameters are st

20、able.In additi on ,the electromag netic torque and torque an gle is a nonlinear relationship,but in the practical application is approximately linear,using PIregulatio n,peforma nee so that the PI parameters can also affect the system.1.4 The model refere nee adaptive con trol(MRAS)The model system

21、requirements of the control system with a model for the adaptive control,the output response model is ideal,this model is called the reference model.The system always tries to make dyn amic con siste ncy can bed yn amic refere nce model and the adjustable model in operati on .By compari ng the outpu

22、t of refere nce model and actual process,a nd through the adaptive con troller to adjust some parameters of the adjustable model or gen erate an auxiliary in put,so that the output error betwee n actual output and the refere nce model as small as possible .In practical applicati on, usually used for

23、 speed estimati on ,to realize the speed sen sor less operati on. Therefore,the model refere nce adaptive depe nds mainly on the accuracy of the adjustable model,the stable operati on of the system plays a decisive role in .In addition,the adaptive control law parameters tuning is a difficult proble

24、m,the control accuracy of the con trol system has a great impact.1.5The stateobserver based con trolCon trol based on state observer is developed based on the moder n con trol theory,observer based on the mathematical model of perma nent mag net synchronous motor,used for each observati on con trol

25、system and the state,thus extract ing speed con trol.It is also depe ndent on the accuracy of the motor model,the appearanceof large error will run at low speed or in creas ing temperature leads to the variati on of motor parameters,so as to bring large deviati on to con trol.1.6 in tellige nt con t

26、rolThe use of intelligent algorithms,intelligent control of the control system, such as fuzzy con trol, neural n etwork con trol,self-t uning parameters and so on through one or several times after the trial operation, automatic parameter tuning out,to realize the optimization control.Intelligent co

27、ntrol has many advantages,especially in the motor is multi variable ,non li near con trol system,however,c on trol and its performa nce depe nds on the con trol object,that is to say not every control system can achieve good control,which require sexperience.At the same time,the large amount of comp

28、utation,but also has certain requireme nts for the con troller.Synchronous Motor because of hav ing power factor higher run- time efficie ncy higher , stability good, the revoIving speed settles to wait a merit, is extensively been applied to in dustrial producti on amid. The start ing fault that ac

29、qua ints with synchronous motor, and debugg ing in time, all have importa nt meaning to the motor and the product ion systems . By way of energy in time, accurate debugging and transaction fault, have the familiar fault progress of the synchronous motor in detail an alytical!2 Familiar fault2.1 The

30、syn chro motor after switchi ng on electricity the in capability startsThe syn chro motor after starti ng the in capability run - time gen erally has the reas on of severals as follows:(1) Power supply voltage over low.Because at the square of voltage, the starti ng torque direct proporti on of syn

31、chro motor's the voltage of power supply over make low the starti ng torque of synchro motor significantly the droop is lower than load troque, can not start thus and want to raise vs this power supply voltage to enlarge the starting torque of dynamo.(2) The fault of motor. Check motor settle, t

32、he rotor winding had no short circuit, open circtui, open soldering and link bad etc. fault, these the faults will make the dynamo can not start to create starting of rating of intensity of magnetic field, make thus the dynamo can not start;Checking the motor bearing has already had no failure, the

33、port cap has have no loose, if bearing failure port shroud loose, result in bearing's down sinking, mutually rub with stator iron core, result in thus dynamo's canning not start, vs settle the rotor fault can be shaken table with the low tension, gradually click to check to seek a fault cond

34、ition and adopt homologous treatme nt;The coun tersgaft accepts and carries to shroud a loose con diti on and all wants a pan car before driving each time and sees motor rotor whether slewing is vivid, if bearing or shaft kiowatt damage and replace in time.(3) The con trol device breaks dow n. This

35、kind of faults are mostly the d.c. output voltage of the windings of Li magnetic belt to adjust not appropriate or don't output, result in the stator curre nt of motor over big, cause the motor con duct electricity the run make or the losi ng of dynamo magnetic belt run - time.Should check wheth

36、er output voltage current and its waveform that the Li magnetic belt equips is normal at this time, the Rong breaks whether the mach ine Rong breaks, the con tact is bad;Whether circuit board plug-i n puts pris on or alignment;Check loop resistance,put out whether crystal gate tube of magnet burns o

37、ut or brokes through.(4) Mecha nical trouble. Such as be dragged along a dyn amic mach inery to block, result in motor in capability's starti ng, the rotor that moves motor in resp onse to the pan at this time sees whether the slew ing is vivid, machi nery burde n whether existe nee fault2.2The

38、syn chro motor in capability leads long in to syn chro ni zati on.Syn chro motor in com mon use law of nonsynchronous start in g,throw in Li magn etic belt when the motor rotor revoIving speed hits synchronous revoIving speed of 95%, make it leads long into synchroni zati on. The syn chro motor in c

39、apability leads long into synchronous reas on as follows:(1) The Li magnetic belt winding short circuit.Because the winding of Li magnetic belt, existence short circuit breaks down, as a result makes motor able to stabilize run - time but in capability and lead long into synchroni zati on while bein

40、g lower tha n synchronous revo Iving speed. Check to seek the Li magnetic belt winding short circuit, can open into low - tension(about the 30 Vs) in the rotor derivation on - line, put on the magnetic poles surface with a hand work steel saw, pursue in spect ion magn etic poles, if vibrat ing is vi

41、ole nt, expla in the magnetic poles to have no short circuit on steel saw of the magnetic poles' surface, if the vibrating of saw blade micro or don't flap, explain the magnetic poles short circuit. After unioading the magnetic poles, check the fault to click,is short-circuit degree, adopt l

42、ocal to mend or re- round to make.(2) Power supply voltage over low. Power supply voltage over low, result in the strong Li link of the device of Li magn etic belt in capability work ing, make the motor in capability lead long into synchroni zati on thus, the con crete way is to raise power supply v

43、oltage appropriately.(3) The fault of Li magnetic belt device. Such as throw Li over speedy(namely throw in Li magn etic belt, motor rotor revo Iving speed over low), will make the motor can not lead long into synchronization, should check to throw if the Li link exists fault at this time. If Li mag

44、netic belt device fault, the output's current is lower than a rating value, cause the electricity magnetic troque of dynamo over small but can not lead long into synchronization, at this time in response to scrutiny Li magnetic belt device of throw Li link and phase - shifting link, waveform use

45、 oscillo graph to check to throw Li link and phase - shifting link, should also check and put out magnetic belt link and put out crystal gate of magnetic belt whether tube discovers a question as usual, han dle in time, if the in capability han dles in time, by way of the en ergy quickly restore cap

46、acity, should replace to provide for use circuit board.2.3 Brush and compress tightly spring and gather to give or get an electric shock ring fault.The brush leads short and compresses tightly spri ng press scarcity and make brush and gather to give or get an electric shock ring of in directly touch

47、 badly, thus gen erate spark or arc electric, arc electric or spark to on the other hand and easily spark short circuit, will make arc electric burn on the other hand shorter, spark open circtui thus, result in Li magnetic belt device only the Li magnetoelectricity press but have no Li magnetoelectr

48、icity streaming;Compress tightly spring ageing lapse, make brush and gather to give or get an electric shock ring of in directly touch badly, effect the starti ng of motor thus;Gather to give or get an electric shock a ring surface to there is grease sta in and scar or slot scar, will make brush and

49、 gather to give or get an electric shock ring of in directly touch badly, gen erate spark, spark further bur n gather to give or get an electric shock ring, will also make gnd short-circuit, the spark effects the starting of motor thus.For gather to give or get an electric shock ring superficial gre

50、ase sta in, can wipe to clea n with the acet one; For thin trace, use many fettle shagg ing rings of san dpapers surface, is ring surface roughness to hit R1.6 ums, if the slot scar obviously needs to get on the car bed transform, truning, enter amount of knife to take every time 1 mm as proper, in

51、the 1-1.5 ms/s, the truning speedcontrol's roughnesshits of the ums of R1.5-1.8 and becomesbad anti to fin ally polish with the san dpaper 2-3 times over the 0.05 mms.2.4 The damper winding breaks dow n.The damper winding of syn chro motor rotor is provided for syn chro motor start ing to use an

52、d wipe - out run - time at the same time amid spark because of loading to change of out of step osc.Start the damper win di ng in the process to in cise the magn etic field of stator revolutio n but in duced very big start ing curre nt in the syn chro motor, so the big curre nt by all means will res

53、ult in damping hair thermal expansion, under the normal condition because of starting time short, the damper winding starting is behind soon will cool off, but block up revolution in the motor, lack phase, start the super - in time to length ways wait a condition down, if don't shut down in time

54、, will result in the damping take off soldering to split etc. condition.The damper wi nding is weaker link in the syn chro motor parts, the damper win di ng familiar fault has:The damp ing takes off solderi ng and split, the damp ing ring discharges wildfire, damp ing ring the strain is serious.Thes

55、e faults will effect the starting of synchro motor. The damping takes off solderi ng and chooses silver acti nium weldi ng rod and adopts oxyacetyle ne weldi ng to weld, the dynamo after taking out the core heats into rotor 200 Celsius degrees set rotor vertical in the ove n, after tak ing out and a

56、dopt 750 Celsius degrees to or soly weld temperature, damp ing and the bli nd side of of damp ing ring complete solderi ngs are full, clear a solderi ng dirt aga in, ;For split of the damping , after dismantling original damping, choose the material of material homology and adopt the above-mentioned

57、 method to weld after packing good damp in g.Damp ing ring the wildfire is mainly what damp ing ring in directly touches bad or get in touch with area isn't eno ugh to result in. Damp ing ring the stra in seriously is mainly a damping to fix anticoincidence in the slot, the damping plugs into da

58、mping ring while welding hole falsely, appear additi onal stress after weld ing, at plus damp ing ring inten sity not eno ugh to, treatment is loose open all connectivity bolts of damping rings, vs strain anti big of damping ring, after oxyacetyle ne weldi ng heati ng adjust with the exclusive use f

59、ixture eve n, vs strain serious replace a new damp ing of ring.3 Con clusi onWhe n the syn chro motor appears fault, cautiously an alytical possible reas on, gradually expel, look into related data when it's necessary, absorb experience, propose corrective actions.Analytical the dynamo fault not only need to have firm theory knowledge and experience of prolific maintenance repairs, but also need to aim at concrete fault, deep con siderati on, brave creative, the dyn amo after en suri ng to break dow n removal